CB-570: deliver composed OpenCode charter

The supplier swap left three parameter lists indented one column past
their siblings and one javadoc line broken mid-sentence. No behaviour
change.

.claude-plugin/marketplace.json

@@ -0,0 +1,18 @@
+{
+  "name": "claude-bridge",
+  "description": "Tooling for orchestrating a fleet of delegated coding agents through the bridged MCP gateway.",
+  "owner": {
+    "name": "LTMS"
+  },
+  "plugins": [
+    {
+      "name": "claude-bridge",
+      "source": "./plugin",
+      "description": "Make a project bridge-ready: mount the bridged MCP gateway and apply standard Claude Code settings so a session can orchestrate delegated workers. Ships no credentials.",
+      "version": "0.1.0",
+      "author": {
+        "name": "LTMS"
+      }
+    }
+  ]
+}

.claude/skills/implementer/SKILL.md

@@ -0,0 +1,137 @@
+---
+name: implementer
+description: Implementer-role procedure for a bridged worker — verify your worktree, implement the scope, commit, push, open your own PR, and hand off the PR URL. Load this when the lead delegates you an implementation task over bridged.
+---
+
+# Implementer worker — procedure
+
+The turn contract (one `bridge_reply`, `bridge_ask` for the lead's decisions, honest reporting,
+never merge, never commit `.mcp.json` or `wiki/`) is in **`CLAUDE.md` → Bridge communication →
+Worker** and already applies. This skill is only the *implement-and-hand-off procedure*.
+
+You run in an **isolated git worktree on your own branch** — a full peer of the primary (same repo,
+`CLAUDE.md`, skills), differing in the model behind you and the branch you sit on. Your MCP surface
+is **only what your launcher mounted** (the bridge): the primary's IDE and forge servers are not
+yours, and the worktree's `.mcp.json` is deliberately emptied so you cannot inherit them.
+The worktree model is documented in [`docs/Worker-Git-Workflow.md`](../../../docs/Worker-Git-Workflow.md).
+
+## 1. Confirm where you are — then never leave
+
+Before touching anything:
+
+```bash
+git rev-parse --show-toplevel   # your worktree root — NOT the primary's main tree
+git branch --show-current       # your dedicated branch: worker/<ticket>-<nonce>
+git status                      # should be clean at the start
+```
+
+Do **all** work here, on this branch. Never `git checkout main`, never rebase onto or push to
+`main`. The branch is your isolation — respect it.
+
+**Every path you read, edit, or build is relative to that root.** Work from `$PWD`; if a tool, a
+brief, or your own memory hands you an absolute path, check it starts with your worktree root
+before you touch it, and stop if it doesn't. An absolute path pointing anywhere else is the
+primary's checkout — editing there while building here means **every build you run is of code that
+does not contain your changes**, and it passes while your work goes nowhere. This has happened:
+a worker made all 59 of its edits in the primary's tree and never noticed.
+
+```bash
+test "$(git rev-parse --show-toplevel)" = "$PWD" || cd "$(git rev-parse --show-toplevel)"
+```
+
+## 2. Implement
+
+- Implement exactly the scope the lead named. Keep the diff focused; note anything out of scope
+  in your reply instead of widening it.
+- Match the surrounding code's style, naming, and idioms.
+
+**Acceptance criterion — a green build, quoted.** Your work is not done until this passes *inside
+your worktree*:
+
+```bash
+cd "$(git rev-parse --show-toplevel)/bridged" && mvn clean install
+echo "exit=$?"
+```
+
+Read its **full** output — never pipe it through `tail`/`head`/`grep`, which hide a failure behind
+a zero exit. Then quote the real `Tests run: … Failures: … Errors: …` line and the
+`BUILD SUCCESS`/`FAILURE` verbatim in your reply. If it does not go green, say so with the actual
+error; a failing build honestly reported is a usable result, a claimed-green one is not. You have
+no IDE MCP tools, so `mvn` is your only verification — never claim a check you had no way to run.
+
+## 3. Commit
+
+```bash
+git add <the files you changed>     # explicitly — never `git add -A` / `git add .`
+git commit -m "<ticket>: <clear one-line summary>"
+```
+
+`.mcp.json` is neutralized and `--skip-worktree` in your worktree — never `git add` it, and never
+"restore" it from the primary's copy. Same for `wiki/` (a submodule with its own remote).
+
+## 4. Push
+
+```bash
+git push -u origin HEAD
+```
+
+Push is over SSH as the same user — no extra credential needed. Never force-push over anything
+you did not create.
+
+## 5. Open your own PR to `main`
+
+Via the gitea REST API. The daemon injected a **repo-scoped token** (`GITEA_TOKEN`) and the forge
+host (`GITEA_HOST`) into your env for exactly this — the token can create a PR but **cannot
+merge**.
+
+```bash
+API="${GITEA_HOST%/}/api/v1/repos/lms/claude-bridge/pulls"
+BRANCH="$(git branch --show-current)"
+curl -sS -X POST "$API" \
+  -H "Authorization: token ${GITEA_TOKEN}" \
+  -H "Content-Type: application/json" \
+  -d "$(cat <<JSON
+{"head": "${BRANCH}", "base": "main",
+ "title": "<ticket>: <concise change summary>",
+ "body": "<what changed and why; reference the ticket; note tests run and their result>"}
+JSON
+)"
+```
+
+The response JSON carries `"html_url"` — that is your PR URL. On a non-2xx, read the error body,
+fix it if the cause is yours (e.g. branch not pushed yet), and report the failure rather than
+inventing a URL. If `GITEA_TOKEN` is unset your profile was not granted PR-create: push the branch
+and report its name so the lead opens the PR.
+
+## 6. Hand off — what goes in `bridge_reply`
+
+The reply is the entire handoff; the lead cannot see your terminal.
+
+```
+PR:      <html_url from step 5, or "not created: <reason>" + branch name>
+branch:  <your branch>
+root:    <git rev-parse --show-toplevel — proves you worked in your own worktree>
+files:   <worktree-relative paths you changed>
+build:   <the verbatim "Tests run: …" and BUILD SUCCESS/FAILURE lines — or "not run: <why>">
+summary: <2-3 lines: what you implemented and any caveat the reviewer needs>
+```
+
+```mermaid
+sequenceDiagram
+    autonumber
+    participant L as Lead
+    participant I as Implementer (you)
+    participant G as git / gitea
+
+    L->>I: delegated task (you are in a worktree on your branch)
+    I->>I: "implement here — every path under $PWD"
+    I->>I: "mvn clean install in this worktree, unpiped, until green"
+    I->>G: git commit (never .mcp.json / wiki)
+    I->>G: git push -u origin HEAD
+    I->>G: POST /pulls (GITEA_TOKEN) — open PR to main
+    G-->>I: html_url
+    I->>L: bridge_reply(PR url, branch, files, tests)
+    Note over L,G: the lead reviews the PR and merges on green — you never merge
+```
+
+*The implement turn: work in the worktree, commit → push → open the PR, hand off the URL.*

.claude/skills/port-to-opencode/SKILL.md

@@ -0,0 +1,180 @@
+---
+name: port-to-opencode
+description: Make an OpenCode session a first-class participant in a Claude Code workspace — instructions, MCP servers, and secrets — without duplicating config. Use when onboarding opencode to a project that already has CLAUDE.md and .mcp.json, or when an opencode peer needs the same tools and rules as the Claude session.
+---
+
+# Porting a Claude Code workspace to OpenCode
+
+**The headline: there is almost nothing to port.** OpenCode reads `CLAUDE.md` natively. The only
+artifact you create is one `opencode.json` mapping MCP servers. Do not translate instructions, do
+not generate a second rules file, and do not install a sync tool — every one of those makes the
+workspace worse.
+
+Everything below was verified against `opencode 1.18.16` and the OpenCode docs.
+
+## 1. Know what you get for free
+
+OpenCode's instruction search order:
+
+```
+1. walking up from cwd:   AGENTS.md , then CLAUDE.md
+2. global:                ~/.config/opencode/AGENTS.md
+3. Claude Code global:    ~/.claude/CLAUDE.md          (unless disabled)
+```
+
+*"The first matching file wins in each category."*
+
+Consequences that decide the whole procedure:
+
+- **A project `CLAUDE.md` is already read.** No port needed.
+- **Your user-level `~/.claude/CLAUDE.md` is already read too.** Global preferences carry over.
+- **An `AGENTS.md` in the repo SHADOWS `CLAUDE.md`.** If one exists from a previous Codex port,
+  **delete it** — otherwise opencode reads the stale translated copy instead of the real rules.
+  This is the single most likely way to get this wrong.
+
+## 2. Create `opencode.json` for MCP servers only
+
+Project config lives at `opencode.json` in the repo root; the global one is
+`~/.config/opencode/opencode.json`. **Configs merge, they do not replace** — so machine-local
+servers belong in the global file and shared ones in the project file.
+
+Map each entry from `.mcp.json`:
+
+| `.mcp.json` | `opencode.json` |
+|---|---|
+| `"type": "http"` / `"sse"` | `"type": "remote"`, `"url"` |
+| `"type": "stdio"` | `"type": "local"`, `"command": ["bin", "arg"]` |
+| `"command"` + `"args"` | single `"command"` array |
+| `"env"` | `"environment"` |
+| `"headers"` | `"headers"` |
+
+```json
+{
+  "$schema": "https://opencode.ai/config.json",
+  "instructions": ["CLAUDE.md"],
+  "mcp": {
+    "bridged":  { "type": "remote", "url": "http://127.0.0.1:8765/mcp", "enabled": true },
+    "context7": { "type": "remote", "url": "https://example.dev/mcp", "enabled": true,
+                  "headers": { "Authorization": "Bearer {env:CONTEXT7_TOKEN}" } },
+    "gitea":    { "type": "local", "command": ["gitea-mcp", "-t", "stdio"], "enabled": true,
+                  "environment": { "GITEA_ACCESS_TOKEN": "{env:GITEA_ACCESS_TOKEN}" } }
+  }
+}
+```
+
+Set `instructions` explicitly even though `CLAUDE.md` is found anyway — the fallback only applies
+while no `AGENTS.md` exists, and being explicit survives someone adding one later.
+
+## 3. Reference secrets, never embed them
+
+OpenCode substitutes at load time, in both `headers` and `environment`:
+
+```
+{env:VARIABLE_NAME}      value from the environment
+{file:~/.secrets/token}  value read from a file
+```
+
+**No credential ever belongs in `opencode.json`.** With `{env:…}` there is no reason to write one,
+which is what makes this file safe to commit — and it must be committable, because a peer running
+in a git worktree receives tracked files only.
+
+**But `{env:…}` reads OpenCode's *process* environment — and OpenCode has no env store of its
+own.** A Claude Code `env` block in `~/.claude/settings.json` or `.claude/settings.local.json` does
+**not** reach it: those files are Claude Code's, and the variables exist only inside processes
+Claude Code spawned. Verify with a clean login shell, not the shell your agent hands you:
+
+```bash
+env -u MY_TOKEN zsh -lc 'echo "${MY_TOKEN:-NOT IN PROFILE}"'
+```
+
+So `{env:…}` only works if something puts the variable in the environment first. Pick the supply
+route by who launches opencode:
+
+| Launcher | Route |
+|---|---|
+| a human, from a terminal | one central store, sourced by the login shell |
+| a spawner (bridge, CI, IDE) | `{env:…}`, with the spawner injecting the variable |
+
+**For the human case, keep every credential in one file the login shell sources.** Here that file
+is `${SHARED_ENV}/tools/secrets.sh`, sourced from `${SHARED_ENV}/.ltms`, kept at mode 600 and never
+committed. `opencode.json` then names variables and holds no values:
+
+```json
+"headers": { "Authorization": "Bearer {env:CONTEXT7_TOKEN}" }
+```
+
+Both routes end at the same syntax, and that is the point. The file does not change when a human
+launches opencode instead of the bridge.
+
+**`{file:…}` also works, and this project moved away from it.** Opencode resolves a relative
+`{file:}` path against the project root, so a gitignored `.secrets/` beside `opencode.json` needs no
+shell setup at all. It did not fail; the problem is that it makes a second copy of the token. The
+same secret then lives in two places, and the copy you forget is the one that leaks or goes stale.
+One store with many references is easier to rotate and to audit.
+
+**One catch survives either choice, so state it out loud:** what a human's shell exports does not
+reach a spawned peer, and neither does a gitignored `.secrets/` — a git worktree receives tracked
+files only. Spawned peers must be fed through `{env:…}` by whatever launches them. Check the
+variable *names* match: a spawner often injects under a different name than your shell uses, and
+the config has no fallback. In this repo the bridge goes further: it neutralizes a worktree's
+`opencode.json`, so a member cannot inherit the primary's credentials by accident.
+
+## 4. Do not port machine-local MCP servers
+
+IDE indexes, language servers, editor bridges — anything bound to *your* checkout — stay out of the
+project file. Put them in `~/.config/opencode/opencode.json` if you want them personally.
+
+A committed project config reaches every worktree. A worker that mounts servers whose paths point
+into the primary's checkout will edit the primary's files while building in its own — every build
+passes, every change lands in the wrong tree.
+
+Port the servers the work needs. Leave the rest.
+
+## 5. Verify against the running agent, not the file
+
+A file on disk proves nothing about what the agent loaded.
+
+```bash
+opencode run "In one line: state a rule from this project's instructions."
+```
+
+The answer must reflect the actual `CLAUDE.md`. If it answers generically, the instructions did not
+reach the model and everything after this is built on sand.
+
+Then confirm the tools are mounted:
+
+```bash
+opencode mcp list
+```
+
+**"connected" does not mean "working".** A stdio server with a missing credential still completes
+the MCP handshake and reports green; only a real tool call reveals it. Verified: `gitea` showed
+`✓ connected` with no token, then failed the first call with `token is required`. A remote server
+is more honest (`⚠ needs authentication`), but do not rely on that difference — **exercise one
+authenticated tool per server**:
+
+```bash
+opencode run "Call <server>'s <tool>. Report the result or the exact error. One line."
+```
+
+Check too that no server you deliberately withheld is present.
+
+## 6. Report
+
+State what you changed, which servers crossed and which you withheld and why, and quote the
+verification answer verbatim. If any server failed to connect, say so plainly — a partially mounted
+peer is worse than a missing one, because it looks configured.
+
+## Gotchas
+
+- **A leftover `AGENTS.md` silently wins over `CLAUDE.md`.** Check for one before anything else.
+- **`opencode.json` is merged, not overridden** — a global entry and a project entry with the same
+  server name both matter; keep names distinct unless you intend to layer them.
+- **`enabled: false`** turns a server off without deleting its config — prefer it over removal when
+  you may want the server back.
+- **OAuth-based servers** store tokens in `~/.local/share/opencode/mcp-auth.json` after
+  `opencode mcp auth <server>`; that is machine state, never config to commit.
+- **Skills and subagents do not port.** OpenCode uses its own agent markdown under
+  `.opencode/agents/`; `.claude/skills/**` is not read. If a delegation brief tells a peer to load a
+  skill by name, that instruction has no effect on an opencode peer — spell the procedure out in the
+  brief, or author the equivalent agent file.

.claude/skills/reviewer/SKILL.md

@@ -0,0 +1,51 @@
+---
+name: reviewer
+description: Reviewer-role procedure for a bridged worker — how to work a review scope and the exact shape of the finding to report. Load this when the lead delegates you a code review over bridged.
+---
+
+# Reviewer worker — procedure
+
+The turn contract (one `bridge_reply`, `bridge_ask` for the lead's decisions, honest reporting,
+never merge) is in **`CLAUDE.md` → Bridge communication → Worker** and already applies. This
+skill is only the *review procedure*: how to work the scope, and the exact shape of what you
+send back.
+
+## 1. Read the whole scope before you judge
+
+The delegation names your scope — a file, a diff, a PR, a function. **Read all of it first.**
+A review that fires on a snippet misses the caller that makes it safe (or the one that makes it
+a bug). Reviewing part of the scope and guessing the rest is the most common way a reviewer is
+wrong.
+
+## 2. Stay in the scope
+
+- Review **only** what you were assigned. Something elsewhere looks wrong? One line in your
+  reply — do not go hunt it. Wandering is how two reviewers report the same thing and neither
+  covers what it was given.
+- Do **not** edit files or run the build. You review; the owner acts.
+
+## 3. Reach for `bridge_ask` only for a genuine fork
+
+Ambiguous requirement, a missing acceptance criterion, "intended or a bug?", or two defensible
+fixes with different consequences — those are the lead's call, and guessing produces a
+confident-but-wrong finding. Anything you could settle by reading more code is yours to settle.
+
+## 4. The finding — what goes in `bridge_reply`
+
+Report the **single most important** real issue in the scope, in these four lines, under
+~90 words:
+
+```
+1. <path>:<line>
+2. issue: <one sentence — what is wrong and why it matters>
+3. fix: <one line — the concrete change>
+4. severity: high | medium | low
+```
+
+- **Nothing real after reading?** Reply `NO ISSUE` and one line saying why. A clean review is a
+  valid result; a fabricated issue is worse than none.
+- **Severity:** `high` = wrong result, data loss, security, or a hang/crash on a real path ·
+  `medium` = a real bug on an edge path, or a correctness risk under load/concurrency ·
+  `low` = clarity, a latent foot-gun, or a smell with no current failure.
+- Be specific and verifiable: a line number and a one-line repro beat an adjective. If you can't
+  point at where it goes wrong, you haven't found it yet.

.gitea/workflows/ci.yml

@@ -0,0 +1,107 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      # The wiki submodule is docs only and is not needed to build — leave it unfetched so CI
+      # does not depend on the wiki repo being reachable.
+      - uses: actions/checkout@v4
+
+      # The runner image ships an older default-jdk; bridged sets maven.compiler.release=25, so
+      # provision the JDK explicitly rather than apt-installing whatever "default" means today.
+      - name: Set up JDK 25
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: '25'
+          cache: maven
+
+      # setup-java provisions the JDK only — it does NOT install Maven, and the runner image has
+      # no mvn on PATH (a bare `mvn` exits 127). Install it separately. apt pulls a default JRE as
+      # a dependency; JAVA_HOME from setup-java still wins, which the version check below proves.
+      - name: Install Maven
+        run: |
+          apt-get update && apt-get install -y --no-install-recommends maven
+          mvn -version
+
+      - name: Build and test
+        working-directory: bridged
+        # This IS the mock-socket surface CB-503 asks for: the pom's `default-excludes` profile
+        # already sets excludedGroups=contract, so the @Tag("contract") tests — which need a live
+        # herdr socket and a RabbitMQ container — are excluded without any flag here. Everything
+        # that runs does so against the fake UDS herdr and fake ccs/claude stubs.
+        run: mvn -B clean install
+
+      # Deliberately NOT actions/upload-artifact: this Gitea instance presents as GHES, and
+      # @actions/artifact v2+ (i.e. upload-artifact@v4) refuses to run there —
+      # "GHESNotSupportedError ... not currently supported on GHES", which red-Xes an otherwise
+      # green build. Since the artifact could not be retrieved anyway, dump the failing tests into
+      # the log instead, where they are actually readable.
+      - name: Failing test output
+        if: failure()
+        working-directory: bridged
+        run: |
+          for f in target/surefire-reports/*.txt; do
+            [ -f "$f" ] || continue
+            grep -qE "Failures: [1-9]|Errors: [1-9]" "$f" && { echo "===== $f ====="; cat "$f"; }
+          done
+          exit 0
+
+  # CB-521 — actually run the AMQP contract test in CI, against a REAL broker. The broker is a
+  # RabbitMQ SERVICE CONTAINER, not Testcontainers-with-Docker: the runner image has no Docker, so
+  # AmqpReplyInboxContractTest reads AMQP_URI (set below to the service's network alias) and binds
+  # straight to it — no Docker, no skipped tests. This separation (build job hermetic and
+  # Docker-free; contract job broker-provided) is deliberate — see the default-excludes/contract
+  # profiles in bridged/pom.xml. `setup-java` provides the JDK only; Maven is installed separately,
+  # exactly as in the build job above.
+  contract:
+    runs-on: ubuntu-latest
+    services:
+      rabbitmq:
+        image: rabbitmq:3.13          # same AMQP 0-9-1 engine the local Testcontainers fixture uses
+        env:
+          RABBITMQ_DEFAULT_USER: guest
+          RABBITMQ_DEFAULT_PASS: guest
+        ports:
+          - 5672:5672
+    env:
+      # Service containers are reachable from the job by their network alias on their internal port.
+      AMQP_URI: amqp://guest:guest@rabbitmq:5672
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up JDK 25
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: '25'
+          cache: maven
+
+      - name: Install Maven
+        run: |
+          apt-get update && apt-get install -y --no-install-recommends maven
+          mvn -version
+
+      # The `contract` profile clears the default-excludes group, so the @Tag("contract") AMQP test
+      # runs against the RabbitMQ service container (AMQP_URI). Pinned to the one contract test to
+      # avoid re-running the unit suite already covered by the `build` job.
+      - name: Contract tests
+        working-directory: bridged
+        run: mvn -B -Pcontract test -Dtest=AmqpReplyInboxContractTest
+
+      - name: Failing test output
+        if: failure()
+        working-directory: bridged
+        run: |
+          for f in target/surefire-reports/*.txt; do
+            [ -f "$f" ] || continue
+            grep -qE "Failures: [1-9]|Errors: [1-9]" "$f" && { echo "===== $f ====="; cat "$f"; }
+          done
+          exit 0

.gitignore

@@ -0,0 +1,13 @@
+# No secret belongs in this repo any more: every credential lives in one shell-level store
+# (${SHARED_ENV}/tools/secrets.sh), and opencode.json reads it as {env:...}. This line stays as a
+# backstop, so a workspace-scoped copy that someone re-creates by habit still cannot be committed.
+.secrets/
+
+# Settings backups inherit the env block — and secrets with it.
+.claude/settings.local.json.bak*
+
+# Daemon runtime artefacts. bridged appends its log wherever it is launched from, so both the
+# repo root and bridged/ collect one; neither belongs in git.
+bridged.out
+bridged/bridged.out
+logs/

CLAUDE.md

@@ -1,7 +1,245 @@
 # claude-bridge — project instructions
 
+## Bridge communication (enforced — read this first)
+
+> **Canonical block.** Everything down to §Layering is the portable bridge charter, copied verbatim
+> into every project that mounts the bridge MCP. Keep it byte-identical with the template in the
+> wiki ([Use Cases](https://git.ltms.dev/lms/claude-bridge/wiki/7-Use-Cases) → *The portable
+> CLAUDE.md block*); improvements go to the template first, then out to each project. Anything
+> specific to *this* repo lives under §Project addendum below, never inline above it.
+
+If no `bridge_*` MCP tools are mounted in this session, this section does not apply — skip it.
+
+`bridged` is the **sole communication gateway** between agents here. The orchestrating session (the
+**primary**) and every delegated peer (a **member**) mount the *same* MCP server and talk only
+through its `bridge_*` tools. No session addresses a peer, a broker, or the network directly.
+
+### Which role am I? — settle this before acting
+
+**Every role reads this file.** A member runs in a git worktree of this same repo, so it inherits
+this `CLAUDE.md` verbatim, and every rule below is role-conditional.
+
+**Call `bridge_whoami`.** It returns `primary`, `worker`, or `architect`, resolved by the daemon from
+your connection — unforgeable, and the same resolution its authorization gate uses. A worker also
+carries its `sessionId`, `profile`, `worktree` and `branch`; an architect carries the slot name it
+was bound to. Don't infer what you can ask.
+
+Only if that call is unavailable, fall back to these — each is one-way, so keep reading until one
+fires: the reply charter in your system prompt (*"You are an off-subscription worker in the
+claude-bridge fleet"*) ⇒ **spawned member**; bridge tools prefixed `mcp__bridge__*` ⇒ **spawned
+member** (the launcher fixes that mount name; a primary's mount is named by whoever wrote its
+`.mcp.json`, so it varies); `ANTHROPIC_BASE_URL` set ⇒ **spawned member** (Claude-model members run
+on a clean env, so its *absence* proves nothing). None of these separate a worker from an architect —
+only `bridge_whoami` does. **Still unsure ⇒ act as a worker**, the most restricted member role. The
+two mistakes are not symmetric: a primary acting as a worker is refused by the authorization gate —
+loud and self-correcting — while a member acting as the primary ends its turn with no `bridge_reply`,
+and the sender silently receives nothing. Fail toward the recoverable error.
+
+### Invariants — both roles, no exceptions
+
+1. **Never set, export, or forward `ANTHROPIC_BASE_URL`** (or `ANTHROPIC_AUTH_TOKEN`). The primary
+   stays on subscription; only the bridge puts a member off it, at spawn. Mounting the bridge must
+   never move a session across that boundary.
+2. **The bridge is the only channel.** Text you print in your terminal reaches nobody — the other
+   side cannot see your screen. An answer that isn't in a `bridge_*` call is silently discarded.
+3. **Identity comes from the connection, never an argument.** Workers never pass a target; you
+   cannot act as another session. Spawn/stop/drain are lead-only; **send is lead or architect**;
+   reply/ask are only-as-itself — any peer may answer for its own pane, and for no other. A call
+   outside your role is refused, not queued.
+4. **Delivery is status-gated: one message per turn.** Don't busy-poll a peer's terminal and don't
+   re-send because a call looks slow — the bridge delivers when the peer is `idle`, `blocked` or
+   `done`. A spawned member must **also** have mounted the bridge MCP: until it has, it is not
+   deliverable, and a send waits on that gate for ~60s and then fails without ever reaching its pane.
+5. **Never drive the terminal multiplexer directly** (no `herdr` CLI, no socket). The bridge owns
+   policy; the multiplexer owns PTYs. Going around the bridge bypasses every rule above.
+
+### Primary (lead) — run this on every task, in order
+
+**Delegate by default — that is the job.** With the bridge mounted you are an orchestrator on a
+metered subscription, and workers are cheap, parallel, and disposable. The default answer to "who
+does this?" is **a worker**, not you. Reach for `bridge_send` before you reach for `Edit`. The steps
+below are the procedure — run them in order, every task, not only the big ones.
+
+0. **Know your role** — `bridge_whoami`, once per session, before anything else.
+1. **Split.** Write the unit list. Every unit carries: scope · the files or PR in question ·
+   acceptance criteria · exactly what to report back. A unit with no acceptance criteria is not
+   ready to delegate — refine it or keep it.
+2. **Gate each unit** on one question: **"can I write a brief good enough for a worker to
+   succeed?"** — *not* "could I do this faster myself?" (usually you could; doing it yourself costs
+   your context and your subscription, while a wasted worker turn costs a worker turn). Yes ⇒
+   delegate. The keep-list is closed: the conversation with the user, decomposition and planning,
+   the final judgment call, verification, merges, and anything that depends on context only you
+   hold. Nothing else is yours by default.
+3. **Spawn every delegated unit first** — `bridge_spawn{profile, worktree:true, ticket}`, one per
+   unit, *before* sending any. Pass `profile` explicitly: profiles differ in model and cost, not in
+   tier, so the default is rarely what you want.
+4. **Then send them all** — `bridge_send{sessionId, content, wait:false}`. Line 1 of every brief is
+   `Load the <name> skill.` naming the worker's playbook; those skills are opt-in and that line is
+   what makes them reliable. Where the project ships no such skill, spell the procedure out in the
+   brief instead. The brief is self-contained — the worker sees your message and the repo, nothing
+   of your context, your plan, or your screen.
+5. **Collect** — `bridge_poll{ticket}` → `bridge_ack{ticket, msgId}`. Answer a worker's `bridge_ask`
+   with `bridge_send{turnId, content}` — **not** `sessionId`. A worker gone quiet is diagnosed with
+   `bridge_status`, never by reading its terminal.
+6. **Verify yourself.** Re-run the build and the checks. A worker mounts only the bridge MCP and
+   cannot run your other tooling, and a piped command (`… | tail`) hides failures behind a zero
+   exit — never promote a worker's "clean" to a fact.
+7. **Review — fan out.** Spawn reviewers against the diff, one per dimension or per file, with
+   `wait:false`. Never the implementer of the scope it reviews, and brief them from the diff — not
+   from the implementer's rationale, which carries its own blind spot. Dispatch each PR's reviewers
+   as it lands; don't wait for the last implementer. Under ~50 changed lines, skip the fan-out and
+   read it yourself.
+8. **Adjudicate, merge, tear down — yours alone.** Read the diff yourself: fully if it is small,
+   targeted at the reported findings and the risky paths if it is large. Reviewer findings direct
+   your attention; they never substitute for it. Then merge, then `bridge_stop{paneId}`.
+
+**Steps 3 and 4 are separate on purpose** — spawning and sending in one loop is how parallel work
+silently becomes serial, and it is the most common way this layer is wasted. For the same reason,
+prefer `wait:false` + `bridge_poll` for anything non-trivial: a blocking `bridge_send` is capped by
+*your own* MCP client call timeout (~60s), well below the task's real runtime.
+
+**Delegating does not delegate responsibility.** Workers open PRs; you are the gate. Never delegate
+the merge — and merging on a reviewer's word is delegating it by proxy.
+
+| Intent | Tool |
+|---|---|
+| Confirm your own role | `bridge_whoami` |
+| See backends available | `bridge_profiles` |
+| Start a member | `bridge_spawn{role?, profile?, cwd?, worktree?, ticket?}` → `sessionId` + `paneId` |
+| See the fleet | `bridge_list` → `leads` (your peers) + `members` · one peer's state: `bridge_status{sessionId}` |
+| Delegate (blocking) | `bridge_send{sessionId, content}` |
+| Delegate (long task) | `bridge_send{sessionId, content, wait:false}` → ticket → `bridge_poll{ticket}` |
+| Answer a member's `bridge_ask` | `bridge_send{turnId, content}` — **not** `sessionId` |
+| Message a **peer lead** | `bridge_send{sessionId: <their terminal>, content}` — `bridge_list` → `leads` reports it. Coordination only, **never** a task |
+| Answer a peer lead that messaged you | `bridge_reply{content}` — the one case a lead replies |
+| Collect a held reply | `bridge_poll{target}` · then `bridge_ack{target, msgId}` |
+| Tear down a member | `bridge_stop{paneId}` |
+
+### Lead ↔ lead — coordinate, never delegate
+
+`bridge_list` returns `leads` alongside `members`; your own row carries `self: true`. Every other row
+is a peer — an orchestrator with its own context, its own members, and its own judgment. An empty
+`members` array means no members are spawned; it says nothing about peers.
+
+**A lead never assigns a task to another lead.** Work goes to members — only ever downward, never
+sideways. Sending a peer a brief with acceptance criteria is a category error: a brief is a member's
+artefact, and a peer is not yours to task. If a unit needs doing and it falls in your area, spawn a
+member and delegate it yourself; if it falls in the peer's area, say so and let the peer assign it.
+The traffic between leads is coordination and nothing else:
+
+1. **Divide the map, not the work.** Agree who owns which area, then each of you assigns inside your
+   own. Split by **context ownership** — whoever already holds the context owns that area — and say
+   who takes what, in one message, before either of you starts. Two leads silently working the same
+   unit is the failure mode here, and neither notices until the merge.
+2. **Share findings, hazards, and corrections.** What you have already discovered, what broke, what
+   the next person will trip on. This is the traffic that actually pays for the channel: it costs one
+   message and saves a peer a rediscovery.
+3. **Verify a peer exactly as you verify yourself.** Peer status buys nothing: check the claim
+   against the code, and re-run the build. A peer's correction gets the same treatment — right or
+   wrong on the evidence, not on who said it. Neither of you merges the other's work unreviewed.
+
+Being messaged by a peer does not make you its worker: answer with `bridge_reply`, and push back on
+the substance if it is wrong. A peer that simply complies has thrown away the reason there are two of
+you.
+
+### Member (worker or architect) — the turn contract
+
+1. **Load the playbook skill the lead named** before doing anything else.
+2. **Do the assigned scope only.** Note anything you spot outside it in one line; don't go hunt it.
+3. **`bridge_ask{question}`** when a decision is genuinely the lead's (ambiguous requirement, two
+   defensible fixes, "bug or intended?"). It blocks and you resume the *same* turn with the answer.
+   Don't ask what you could decide yourself.
+4. **End the turn with exactly one `bridge_reply{content}`**, carrying your complete answer. This is
+   the whole handoff. No `bridge_reply` ⇒ the sender gets nothing and the exchange stalls.
+   Do **not** lean on the completion fallback to carry your answer for you: when you end a turn
+   without replying, the bridge scrapes your pane, and it can return only the last 4000 characters.
+   A clipped scrape is marked as partial, but the missing text is gone — your report reaches the
+   lead with its end cut off.
+5. **Report honestly.** State only what you actually ran and its real output, including failures.
+   You mount **only** the bridge MCP — the primary's other servers (IDE, forge, docs) are not yours,
+   so never claim the result of a check you had no way to run.
+6. **Never merge.** Stage files explicitly — never `git add -A` — and leave alone anything the
+   project marks as not-yours-to-commit.
+
+### Where each rule lives (don't duplicate — extend the right layer)
+
+| Layer | Scope | Reaches |
+|---|---|---|
+| the launcher's reply charter | the one rule that must survive with no repo: *end every turn with `bridge_reply`* | every spawned member, at launch, every peer kind — never a lead |
+| **this section** | protocol + orchestration policy | primary **and** every member that reads the repo — tracked in git, so worktrees inherit it |
+| role playbook skills | per-job procedure (commit/PR recipe, finding format) | a member told to load one |
+| the bridge's own docs | design detail, flows, error model | on demand |
+
+A rule belongs in **exactly one** layer — the outermost one that must obey it. Peers that don't read
+`CLAUDE.md` (non-Claude adapters) get the charter only, so any rule *they* must obey belongs in the
+charter, not here.
+
+## Project addendum — claude-bridge (not part of the canonical block)
+
+- **This repo is the bridge.** The daemon is `bridged`, its MCP mount is `http://127.0.0.1:8765/mcp`,
+  and the code behind the rules above is `mcp/BridgeMcp` (tools), `auth/Authz` (the role table),
+  `mcp/ConnectionIdentity` (connection→role), and `worker/*Launcher` (`REPLY_CHARTER`).
+- **Skills available to delegate:** `implementer` (worktree → commit → push → own PR) and
+  `reviewer` (scoped review → one structured finding). Name one in every delegation.
+- **Primary-side skills** (not delegation playbooks — a worker cannot use them):
+  `port-to-opencode` (make an OpenCode session a participant in this workspace).
+- **Never commit** `.mcp.json` (the primary's local copy, flagged `--skip-worktree`) or `wiki/`
+  (a submodule with its own remote).
+- **Flows and the error model** — rendezvous, `bridge_ask`, detached delivery, turn-done fallback —
+  are diagrammed in `docs/MCP-Contract.md` §6, kept out of this file because it loads into every
+  session's context.
+
+### The prompt is part of the product — update it with the code (mandatory)
+
+This repo *is* the bridge, so the canonical block above is not documentation about someone else's
+system: it is the instruction surface this codebase ships. **Every change here must end by asking
+whether the block still tells the truth.** A code change that silently invalidates it is an
+incomplete change — the agents reading it have no other source.
+
+Before you call any work done, check the row that matches what you touched:
+
+| You changed… | Re-read and update… |
+|---|---|
+| a `bridge_*` tool — added, removed, renamed, or its params/semantics | the primary's intent→tool table; any rule that names that tool |
+| `Authz` / the role table | invariant 3, and the primary-only vs worker-only claims |
+| `ConnectionIdentity` / how a caller is resolved | the `bridge_whoami` paragraph and the fallback ladder |
+| `REPLY_CHARTER`, or a launcher's mount/flags | the fallback ladder (`mcp__bridge__*`), and the layering table's top row |
+| the injector / status gating | invariant 4 |
+| worktree provisioning or the parity overlay | the "both roles read this file" premise — it rests on the worker's worktree being a checkout of this repo |
+| `.claude/skills/**` | the addendum's skill list, and the "name the playbook" rule |
+| a new peer kind (non-Claude adapter) | what that peer can read — anything it must obey belongs in its charter, not in the block |
+| **anything an operator can use, configure, or observe** — an MCP tool, a `bridged.yaml` knob, an endpoint, a visible behaviour | **[Features](wiki/11-Features.md)** — one entry: what it does · the knob that turns it on · **why it exists** · the gotcha |
+
+That last row is not bookkeeping. Chapters 1–10 answer *how is this built* and *why this way*;
+none of them has a home for *what can it do and how do I turn it on*, so for twenty tickets a
+shipped capability landed nowhere and the Roadmap went on claiming the stage was finished. The
+*why* line is the one that matters — without it a decision gets re-litigated from scratch a month
+later. Internal contract changes go to `wiki/9-Implementation.md` instead; test and coverage work
+is a Roadmap line. A change that touches none of the three earns no entry, and that is a normal
+outcome rather than an omission.
+
+Then **propagate**: the block in this file and the template in the wiki
+([Use Cases](https://git.ltms.dev/lms/claude-bridge/wiki/7-Use-Cases) → *The portable `CLAUDE.md`
+block*) must stay byte-identical, and other projects carrying the block need the same edit. Verify
+rather than trust:
+
+```bash
+python3 - <<'PY'
+import pathlib
+c = pathlib.Path("CLAUDE.md").read_text()
+w = pathlib.Path("wiki/7-Use-Cases.md").read_text()
+S, E = "## Bridge communication (enforced", "## Project addendum — claude-bridge"
+block = c[c.index(S):c.index(E)].rstrip() + "\n"
+i = w.index("```markdown\n") + len("```markdown\n")
+print("in sync:", w[i:w.index("\n```\n", i) + 1] == block)
+PY
+```
+
 ## IDE MCP tools & validation workflow (enforced)
 
+> **Primary only.** Workers have no IDE MCP mount — if you are a worker, skip this section and
+> report the build/test output you actually ran (see §Bridge communication → Worker).
+
 Two IDE MCP servers are connected: **intellij-index** (semantic code intelligence) and
 **jetbrains** (file problems, reformat, debugger). IntelliJ has multiple projects open; our
 module is **`bridged`**. Always pass these to IDE MCP tools:
@@ -20,6 +258,15 @@ module is **`bridged`**. Always pass these to IDE MCP tools:
    test run). A per-file-clean file can still break the build or another module. This is the
    whole-project gate before declaring work done or committing.
 
+**Whenever dependencies change (or a `pom.xml` edit), validate CVEs with
+`jetbrains get_file_problems{filePath: "bridged/pom.xml"}`** — its Mend.io check reflects the
+dependencies on disk. (Note: `ide_diagnostics` / intellij-index does NOT re-resolve dependencies
+after a pom edit without a full Maven reimport, so it reports stale CVE results — don't trust it
+for this.) Treat a CVE warning like any other: bump to a patched version and confirm
+`mvn clean install` still passes. If the latest available version is still flagged (EOL line,
+"insufficient information", or config-file-only advisories), document it as accepted in the pom
+rather than chasing a fix that doesn't exist.
+
 ### Use IDE MCP tools for navigation, refactoring, and diagnostics only
 
 - **Navigate (prefer over Grep/Read for symbols):** `ide_find_definition`, `ide_find_class`,

README.md

@@ -50,8 +50,9 @@ flowchart LR
   plain daemon (no Anthropic quota), so it may poll/subscribe freely.
 - **One gateway (unified MCP setup):** `bridged` is the **sole communication path** for every
   Claude session. Primary and workers each mount it as an MCP server (one `claude mcp add`
-  line, same on both) and talk over MCP tools — `bridge_send` / `bridge_reply` / `bridge_ask` /
-  `bridge_status`. **No Claude session ever addresses a broker, a peer, or the network
+  line, same on both) and talk over MCP tools — `bridge_send` / `bridge_reply` /
+  `bridge_status` (with `bridge_ask` planned for the blocked-worker path). **No Claude session
+  ever addresses a broker, a peer, or the network
   directly**; any queue is `bridged`-internal. MCP tool I/O never sets `ANTHROPIC_BASE_URL`, so
   mounting the bridge is subscription-safe by construction.
 - **How the primary consumes a reply:** a single **blocking MCP call** (`bridge_send`);
@@ -85,6 +86,38 @@ Gitea wiki.
 
 ## Status
 
-🟢 Design — herdr-centric **`bridged`** message server selected as the primary approach
-(2026-07-11), superseding the AgentAPI plan (2026-07-08). AgentAPI retained as fallback
-injector.
+🟢 **Implemented & dogfooded** — the herdr-centric **`bridged`** message server is built and in
+real use: an Opus primary delegates tasks to off-subscription workers that reply through the
+bridge (code reviews delegated this way have produced committed bug fixes). Selected as the
+primary approach 2026-07-11, superseding the AgentAPI plan (2026-07-08); AgentAPI retained as a
+fallback injector.
+
+**Shipped** (Java 25 · Maven · 266 unit/acceptance tests green; the live-herdr and broker contract
+tests run separately via `mvn test -Pcontract`):
+
+- **Core gateway** — herdr socket client (contract-tested vs live 0.7.0); guard-checked worker
+  spawn with `ANTHROPIC_BASE_URL` injected only into the worker's env; status-gated injector;
+  blocking `bridge_send` with reply rendezvous; MCP server as a thin adapter over the REST core.
+- **MCP tools** — `bridge_send` / `bridge_reply` / `bridge_status` (messaging) and `bridge_spawn`
+  / `bridge_list` / `bridge_stop` / `bridge_profiles` / `bridge_poll` (fleet). Caller identity is
+  connection-based (loopback peer PID → herdr pane), so the same mount serves primary and workers.
+- **Delivery reliability** — completion fallback (a confirmed `working→idle` turn resolves a
+  send); async fire-and-poll (beats the caller's MCP call timeout for long tasks); and failure
+  detection for wedged (`unknown`), vanished, and never-ready workers so a send never hangs.
+- **Fleet** — multiple worker profiles, each with an independent base_url guard check; workers
+  inherit the primary's working directory (never `$HOME`); a readiness gate holds delivery until
+  a worker's Claude has connected the bridge MCP (no paste lost into its boot window).
+- **Blocked-worker path** — `bridge_ask` reverse rendezvous: a worker pauses its delegated turn to
+  ask the primary and resumes the *same* turn with the answer (CB-205).
+- **Session lifecycle** — session manager with spawn/reuse/recycle, `idle_ttl` reaper, `context_cap`,
+  and graceful drain on shutdown (CB-301/CB-303); per-worker git worktrees on their own branch with
+  a config-parity overlay, so parallel implementers never stomp each other (CB-301-ext).
+- **Reliable worker→primary delivery** — a durable `ReplyInbox` (in-memory by default, AMQP/LavinMQ
+  for cross-restart durability) holds a reply that arrives with no open send, and an active
+  status-gated push loop nudges the primary to drain it (CB-307).
+- **Pluggable peers** — a `PeerLauncher` SPI with two in-tree adapters, `claude-code` and `opencode`,
+  routed by a `kind:` discriminator (CB-401/CB-402).
+
+**Next** (see the [roadmap](wiki/8-Roadmap.md)) — Stage 5 hardening (auth/TLS, `/metrics`, CI,
+service supervision, per-session authz + audit), then cross-host: CB-308 multi-host federation and
+CB-500 multi-tier coordination.

bridged/.gitignore

@@ -5,6 +5,9 @@ dependency-reduced-pom.xml
 # Local runtime config (copy from bridged.example.yaml)
 bridged.yaml
 
+# CB-505 audit trail + daemon stdout/stderr — runtime records, never source
+logs/
+
 # Editor / OS
 *.iml
 .idea/

bridged/bridged.example.yaml

@@ -3,31 +3,407 @@
 # bridged is the sole gateway between primary/worker Claude sessions and herdr.
 # It is NOT a Claude process and must never carry ANTHROPIC_BASE_URL.
 
-# REST + MCP listen address. Keep it on loopback — bridged is same-host in Stage-1.
+# REST + MCP listen address. Keep it on loopback unless you also switch auth.mode to `token`
+# below — bridged REFUSES TO START on a non-loopback bind under loopback-trust (see auth).
 bind:
   host: 127.0.0.1
-  port: 8080
+  port: 8765
+
+# API authentication (CB-501). Governs how a caller that is NOT an on-host worker pane proves it
+# is the primary. Worker identity never depends on this: a loopback peer PID that maps to a herdr
+# pane is unforgeable and is always honoured, so turning auth on cannot lock the fleet out.
+#
+#   mode: loopback-trust  → DEFAULT, and the historical behaviour: any loopback caller that is not
+#                           a worker is the primary, no credential needed. Sound ONLY because the
+#                           OS refuses remote connections to a loopback socket.
+#   mode: token           → such a caller must send `Authorization: Bearer <token>`; without it it
+#                           is anonymous and authorized for nothing. REQUIRED for a non-loopback
+#                           bind — the daemon fails fast otherwise, because "unauthenticated ⇒
+#                           primary" on a reachable port would hand spawn/stop/send to anyone.
+#   tokenEnv              → host env var holding the token (never the literal value). Default
+#                           BRIDGED_API_TOKEN. Read only in token mode; empty ⇒ startup fails.
+#
+# TLS is deliberately NOT terminated in the daemon (CB-501 D3): run a reverse proxy in front and
+# let it own certificate lifecycle, e.g.
+#     location / { proxy_pass http://127.0.0.1:8765; proxy_set_header Authorization $http_authorization; }
+# The broker link gets TLS from its own URI (amqps://…) — see `broker` below.
+# auth:
+#   mode: token
+#   tokenEnv: BRIDGED_API_TOKEN
+
+# Optional pinned primary terminal (CB-307). Names the herdr pane the PRIMARY itself runs in:
+# a caller whose connection maps to this pane resolves as the primary (no credential needed —
+# the pane mapping is as unforgeable as a worker's), and reply nudges are pushed to it.
+# REQUIRED when the primary runs inside a herdr pane — without it the pane match reads the
+# primary as a worker and refuses spawn/send/stop. Get the id from bridge_whoami; re-pin if
+# the primary moves panes.
+# primary:
+#   terminal: term_0123456789abcd
+#   pushReminders: 5      # max nudges before giving up (default 5)
+#   pushBackoffMs: 15000  # delay between nudges (default 15000)
+
+# CB-530: MORE THAN ONE LEAD. `primary:` above is singular by construction — every other pane
+# resolves as a worker — which is right for one lead driving a fleet and wrong the moment two leads
+# (say a Claude lead and an opencode lead) work as peers: the second is silently demoted and refused
+# every orchestration call. List each lead's pane here and all of them resolve as leads.
+#
+#   terminal → the ONLY field identity depends on; get it from that session's bridge_whoami
+#   kind/model → descriptive; they document what runs in the pane and are echoed by bridge_whoami
+#
+# A lead is never spawned — it pre-exists, which is exactly why it must be named rather than created.
+# `bridge_whoami` reports `{"role":"primary","leader":"<name>"}`; role stays "primary" because a lead
+# IS a primary for authorization, so nothing that keys on the role breaks.
+#
+# KEEP `primary:` when adding leads: it still addresses the CB-307 push loop, which needs a single
+# destination for its nudges. If both name the same terminal, the `fleet.leaders:` entry wins.
+#
+# Leads are configured under `fleet.leaders:` — see THE FLEET further down.
+#
+# Two things stop the tab-name convention from becoming a way to claim leadership: the configured
+# member spaces are excluded from the scan, so nothing bridged places can land in a matching tab;
+# and startup REFUSES a `tabPrefix` that the fleet tabLabel template, or any per-profile `tabLabel`
+# override, also matches — so the two namespaces cannot overlap by accident. The label is a NAME,
+# never a capability: what a pane may do is decided by the role the daemon resolves for it.
+
+# CB-551: IDLE-LEAD HEARTBEAT — nudge the single lead back to work when it has been continuously
+# idle (no open bridge_send driving it) past the quiet period. The fleet is one lead + architects +
+# workers, so a lead that stalls is a single point of failure; the ReplyPushLoop only nudges when a
+# reply lands, and this timer catches the gap where nothing lands and the lead just sits idle.
+#
+# Opt-in on purpose — it SPENDS the operator's subscription on its own initiative (each nudge starts
+# a lead turn nobody asked for), so upgrading the daemon must never switch it on for you. Absent
+# block = feature off, exactly as before.
+#
+# Three knobs, each with a default that errs on the side of not burning context:
+#   idleAfterSeconds: 300   # how long the lead must stay idle before the FIRST nudge (default 300 —
+#                           # absorbs normal post-turn pauses; re-prompting every pause burns context)
+#   backoffMs: 60000        # re-check cadence / spacing between nudges past the quiet period (default 60000)
+#   quietNudgeCap: 3        # cap on consecutive nudges that find NOTHING pending, then it stops
+#                           # until real state appears (default 3 — never nag an empty fleet forever)
+# leadHeartbeat:
+#   idleAfterSeconds: 300
+#   backoffMs: 60000
+#   quietNudgeCap: 3
 
 # herdr Unix socket. Omit to use the client default
 # (${HERDR_SOCKET_PATH:-~/.config/herdr/herdr.sock}).
 herdrSocket: ~/.config/herdr/herdr.sock
 
-# How a worker session is spawned. Stage-1 uses the existing ccs `ltms-local`
-# profile, whose .claude.json routes to the gx00 vLLM below.
-worker:
-  profile: ltms-local
-  baseUrl: http://gx00.gw:8000     # the gx00 vLLM (models: coder / deepseek-v4-flash)
-  model: coder
-  # Placement: each worker lands in its OWN tab inside a dedicated worker space, so it
-  # never splits or clutters your real work spaces. Use `pane` for the legacy behaviour
-  # (split the currently-focused tab).
-  placement: tab                   # tab | pane
-  workspace: bridged-workers       # the dedicated worker space (found-or-created, shared)
-  tabLabel: "worker: {profile} #{n}"  # {profile}/{model}/{n} substituted; {n} keeps sibling tabs distinct
+# How member sessions are spawned. Define one or more named profiles (backends) under
+# `profiles`; each key is the profile name (also the ccs profile). A profile says only WHICH
+# BACKEND — model, CLI adapter, credentials, cost. It says nothing about what a member spawned on
+# it is for; that is the member's role, and roles live under `fleet:` below. Which profile an
+# unqualified spawn lands on comes from that role's pool, not from a global default.
+#
+# Shared knobs (placement/workspace) can be repeated per profile; they usually match.
+#   placement: tab   → each worker lands in its OWN tab in a dedicated worker space (default).
+#                      Use `pane` for the legacy behaviour (split the focused tab).
+#   mcpUrl           → bridged mounts the bridge MCP (--mcp-config, inline) + reply charter
+#                      (--append-system-prompt) as launch flags; nothing is written to the profile.
+#   tokenEnv         → host env var holding the worker's auth token (value never stored in config);
+#                      omit for a backend that needs no token (e.g. a local ollama).
+#   cwd              → pin this profile's working directory (CB-112). Omit to inherit the primary's
+#                      cwd on an MCP spawn, else the daemon's cwd — never $HOME. See
+#                      docs/Worker-Startup-and-Trust.md.
+#   configDir        → CLAUDE_CONFIG_DIR for the worker, so it inherits that profile's
+#                      skills/MCP/hooks. Omit to leave the worker on the host default.
+#   parityOverlay    → repo-relative paths copied primary→worktree so a worker in a provisioned
+#                      worktree sees the same local config (CB-301-ext). Omit for the default set:
+#                      [.claude/settings.local.json, .env, .envrc].
+#
+#                      Do NOT add .mcp.json (CB-525). A worker's tools are whatever its launcher
+#                      mounts — the bridge, and nothing else. Replicating the primary's MCP config
+#                      handed a worker the primary's IDE servers, which are bound to the primary's
+#                      checkout, so its navigation returned paths OUTSIDE its own worktree: one
+#                      worker made all 59 of its edits in the primary tree while compiling its
+#                      worktree, and every build it ran was of code that did not contain them.
+#                      bridged neutralizes a provisioned worktree's .mcp.json for this reason;
+#                      listing it here would copy the primary's back over that.
+#   gitTokenEnv      → host env var holding the git-forge API token. When set, its value is injected
+#                      as GITEA_TOKEN so the worker can open its OWN PR at checkpoint (CB-302).
+#                      Opt-in by design — omit and the worker gets no PR-create grant (push over
+#                      SSH is unaffected). The token value itself is never stored in this file.
+#   gitHostEnv       → host env var holding the forge host (default GITEA_HOST). Injected as
+#                      GITEA_HOST *only* alongside a resolved gitTokenEnv.
+#   env              → extra environment for this profile's workers, as a literal key/value map
+#                      (CB-511). Use it to give workers a toolchain.
+#
+#                      A worker's environment does NOT come from your shell. bridged hands herdr an
+#                      explicit env map and herdr merges it into ITS OWN process env — so before
+#                      CB-511 a worker inherited whatever PATH the herdr server happened to be
+#                      started with, which on a long-lived herdr can predate your toolchain entirely
+#                      and leave workers unable to run `mvn` or `java` at all.
+#                      bridged now propagates ITS OWN PATH to every worker by default; set `env:`
+#                      only to override that or add more (JAVA_HOME, …). Since the default is the
+#                      daemon's PATH, make sure the daemon is started with a good one — see the PATH
+#                      lines in deploy/dev.ltms.bridged.plist and deploy/bridged.service.
+#
+#                      Adapter-owned variables always win over `env:`: ANTHROPIC_BASE_URL and the
+#                      rest of the ANTHROPIC_*/CLAUDE_* wiring are applied after it, so an `env:`
+#                      entry cannot repoint a worker past the SubscriptionGuard — which is checked
+#                      against `baseUrl` alone.
+# Put `defaultMode: "auto"` in each ccs profile so the worker runs autonomously.
+profiles:
+  gx10:                              # ccs profile name (NOT a hostname)
+    kind: claude-code                # which adapter spawns this profile (default; may omit)
+    baseUrl: http://gx01.gw:8000     # the vLLM host this profile targets (gx00.gw / gx01.gw)
+    model: coder
+    placement: tab
+    workspace: bridged-workers
+    # tabLabel: an optional per-profile override; the fleet template usually covers it
+    mcpUrl: http://127.0.0.1:8765/mcp
+    tokenEnv: BRIDGED_WORKER_TOKEN
+    argv: ["ccs", "gx10"]
+    weight: 0.5                       # relative selection weight for placement: weighted
+    maxLoad: 2                        # max live workers on this profile (omit for unlimited)
+    # gitTokenEnv: GITEA_TOKEN        # opt-in: let this profile's workers open their own PR (CB-302)
+    # gitHostEnv: GITEA_HOST          # defaults to GITEA_HOST; injected only with gitTokenEnv
+    # configDir: /Users/me/.ccs/instances/gx10   # CLAUDE_CONFIG_DIR — inherit that profile's skills/MCP
+    # cwd: /Users/me/src/myrepo       # pin the working dir; omit to inherit the primary's
+    # parityOverlay: [".claude/settings.local.json", ".env", ".envrc"]   # never add .mcp.json — see above
+  gx11:                              # a second backend, so `placement: weighted` has a choice
+    baseUrl: http://gx01.gw:8000     # self-hosted; ccs handles the model + token
+    placement: tab
+    workspace: bridged-workers
+    # tabLabel: an optional per-profile override; the fleet template usually covers it
+    mcpUrl: http://127.0.0.1:8765/mcp
+    argv: ["ccs", "gx11"]
+    weight: 0.5
+    maxLoad: 2
+    # Pin an auto-compact window BELOW the served model's context ceiling. The global
+    # ~/.claude/settings.json value is shared by every ccs instance and the primary, so the
+    # per-profile override belongs here. Equal to the ceiling means auto-compact never fires
+    # before the server rejects the prompt, which kills a worker mid-turn (CB-523).
+    env:
+      CLAUDE_CODE_AUTO_COMPACT_WINDOW: "280000"
+  # CB-402: a second coding-agent kind, proving the PeerLauncher SPI is provider-neutral.
+  # opencode is provider-agnostic and uses NONE of Claude's private seams: no ANTHROPIC_BASE_URL /
+  # SubscriptionGuard (so it needs no `guard` host entry), no --mcp-config / --append-system-prompt.
+  # The bridge MCP + reply charter mount via a generated OPENCODE_CONFIG file, and the model is a
+  # `provider/model` selector. Placement, tabs, cwd, and the readiness gate are shared with Claude.
+  #
+  # Dogfood-verified 2026-07-29 against opencode 1.18.5 (spawn → readiness gate → bridge_send →
+  # structured bridge_reply → teardown). The `opencode/*-free` models run on opencode's own gateway
+  # and need NO credentials — check `opencode models` for the current free list, since the names
+  # change. That also makes the worker off-subscription by construction.
+  #   opencode-free:
+  #     kind: opencode
+  #     model: opencode/north-mini-code-free  # `provider/model` selector, injected as `-m`
+  #     placement: tab
+  #     workspace: bridged-workers
+  #     tabLabel: "opencode: {profile} #{n}"
+  #     mcpUrl: http://127.0.0.1:8765/mcp
+  #     argv: ["opencode"]
+  #
+  # CB-508: point an opencode profile at your OWN OpenAI-compatible endpoint (local vLLM, llama.cpp,
+  # LM Studio, TGI…) instead of opencode's gateway. Setting `baseUrl` on a `kind: opencode` profile
+  # makes the bridge emit a custom `provider` block into the generated opencode.json — opencode has
+  # no ANTHROPIC_BASE_URL seam, so this is how the endpoint is pinned.
+  #   baseUrl → a bare host:port gets `/v1` appended (where these servers mount the API); a URL that
+  #             already has a path is used verbatim, so a custom mount point still works.
+  #   model   → MUST be "<provider>/<model>". The provider half names the generated block; the model
+  #             half must match an id the server reports at /v1/models. One field drives both the
+  #             declaration and the `-m` flag, so they cannot drift apart. A bare model name with a
+  #             baseUrl set is rejected at spawn rather than silently using the default gateway.
+  #   tokenEnv → optional; its value becomes the provider apiKey. Most local servers ignore the key,
+  #             so a placeholder is used when unset (the AI SDK still requires a non-empty one).
+  # NOTE: no `guard` entry is needed even with a baseUrl set. The SubscriptionGuard exists to stop a
+  # worker borrowing the primary's Anthropic subscription, and an opencode process has no Anthropic
+  # credential path at all.
+  #   opencode-local:
+  #     kind: opencode
+  #     baseUrl: http://127.0.0.1:8000
+  #     model: local-vllm/deepseek-v4-flash
+  #     placement: tab
+  #     workspace: bridged-workers
+  #     tabLabel: "opencode: {profile} #{n}"
+  #     mcpUrl: http://127.0.0.1:8765/mcp
+  #     argv: ["opencode"]
+# How an unqualified spawn chooses a profile: fixed (default, reproduces pre-CB-518 behaviour),
+# round-robin, or weighted. Omitting this key is a strict no-op for existing configs.
+placement: weighted
+
+# Re-read this file without restarting the daemon (CB-559). Off unless you add this block, so an
+# upgraded bridged keeps the old behaviour: the file is read once at boot and never again.
+#   enabled          → turn the watch on. bridged checks the file's modified time on a timer and
+#                      reloads when it moves.
+#   intervalSeconds  → how often to check (default 10). One `stat` per tick, so this is cheap.
+#
+# Not every key can move under a running daemon, and the difference is about what already exists
+# when the reload happens — not about how important the key is:
+#   HOT       → takes effect on the next spawn: the whole `fleet:` block (every role pool,
+#               `charters`, and `tabLabel`), `placement:`, and an existing profile's weight / maxLoad. Those are
+#               hot because the placement policy reads them through a supplier — being config is
+#               not by itself enough to make a key hot.
+#   DEFERRED  → accepted into the new config, but the wiring built at startup keeps the old value
+#               until you restart: `lifecycle:`, `leadHeartbeat:`, `guard:`, `worktreeRoot:`,
+#               `spawnReadyTimeoutMs` / `spawnReadyPollMs`, ADDING or REMOVING a profile (a new
+#               backend needs its own launcher, and launchers are built once), AND an existing
+#               profile's launch settings — model, baseUrl, argv, env, configDir, mcpUrl, tabLabel.
+#               The launcher takes a copy of `profiles:` at startup and resolves every spawn out of
+#               that copy, so those never reach a launch until you restart. The reload logs them by
+#               name rather than pretending they applied.
+#   COLD      → cannot change at all: `bind:`, `herdrSocket:`, `broker:` and `auth:`. The socket is
+#               bound, the broker connection is open, and the auth mode decides who may reach the
+#               port that is already listening.
+#
+# A changed COLD key refuses the WHOLE reload — not the hot half applied and the cold half warned
+# about. A half-applied reload would leave the daemon matching no file on disk, which is the worst
+# thing a reload can do to an operator debugging one. A file that fails to parse or fails a startup
+# validator is refused the same way, and the running config stays live.
+# configReload:
+#   enabled: true
+#   intervalSeconds: 10
+
+# THE FLEET (CB-557) — who the daemon may run, and under which role. This one block replaced four
+# older keys: `leaders:`, `members:`, `leadScan:` and `defaultProfile:`.
+#
+# A member is anything a lead spawns, and every member has two INDEPENDENT attributes:
+#   role    — which contract: architect, dev or reviewer. It picks the launch charter, the role
+#             file, the playbook skill and the authz row.
+#   profile — which backend: one of the `profiles:` keys above (model, CLI adapter, cost).
+# They vary on their own. A reviewer may run on the same profile as the dev whose diff it reads,
+# which is why the two cannot be one field.
+#
+# The ROLE IS THE CONTAINING KEY, not a `role:` field. That is not only tidier: a misspelled role
+# used to parse into a member with no contract at all, while a misspelled pool name here simply
+# declares nothing.
+#
+# Each pool lists the profiles that role MAY run on — these are pools, not identities. That is also
+# what replaced `defaultProfile:`: an unqualified spawn names a role, and that role's pool supplies
+# the candidates, in definition order. A dev and a reviewer staying anonymous is exactly compatible
+# with being listed here; the entry key just names the entry.
+fleet:
+  # Optional launch-charter text, keyed only by the singular role wire names: architect, dev,
+  # reviewer. Changes are HOT and reach the next spawn without a daemon restart. Do not put secrets
+  # here: a later launch step writes this text to a world-readable temp file, and ${ENV} interpolation
+  # is deliberately not supported.
+  charters:
+    architect: |-
+      You are an architect in this fleet. You refine work before anyone builds it:
+      scope, acceptance criteria, risks, and a unit split. You read the repo and
+      write analysis. You never commit production code and never open a PR.
+      A design task is worked by two architects. Design alone first, then exchange
+      and say plainly where you disagree. Do not concede just to agree.
+    dev: |-
+      You implement the one unit you were given, and nothing else. You test it,
+      commit it, and open your own pull request. You never merge.
+    reviewer: |-
+      You review the diff you were given. You report bugs, risks and missing tests.
+      You do not change code.
+
+  # Optional. Template for a member tab's label; {role}, {profile}, {model} and {n} are substituted.
+  # {n} counts per role+profile, so `dev: sonnet #2` really is the second sonnet dev. Because {role}
+  # comes from a closed enum, a generated label can never begin with a lead's tabPrefix.
+  # tabLabel: "{role}: {profile} #{n}"
+
+  # Panes that orchestrate rather than are orchestrated. A lead may now be CREATED as well as
+  # recognised: give it a `profile:` and the daemon launches the shortfall when fewer than
+  # `instances` are live. Give it only a `terminal:` and it is recognise-only, as before.
+  #
+  # `tabPrefix` is the naming convention that finds a lead without pasting a terminal id: label the
+  # tab `lead: <name>` when you open it and the pane is recognised on the next rescan. Reopen the
+  # tab later and the id changes; the label does not.
+  #
+  # A lead the daemon launches is labelled BY the daemon, using the same convention, so it is found
+  # by the same scan. A lead counts as live only when herdr also reports a running agent in that
+  # tab — a label left behind by a session that died does not block the relaunch.
+  #
+  # An auto-launched lead is NOT a member: it gets no worker reply charter, is never registered with
+  # the session lifecycle (the idle reaper would kill your orchestrator), and stays on the
+  # subscription — ANTHROPIC_BASE_URL/AUTH_TOKEN are stripped from its env whatever the profile says.
+  # leaders:
+  #   opus-5.0:
+  #     profile: opus                # omit to never create this lead, only recognise it
+  #     instances: 1                 # desired live count; only the shortfall is launched. 0 = off
+  #     terminal: term_0123456789abcd  # optional hand-pin; usually found by tabPrefix instead.
+  #                                  # A running agent on this terminal also counts as live, so a
+  #                                  # lead you opened by hand is not relaunched under you.
+  #     tabPrefix: "lead:"           # `lead: opus-5.0` ⇒ a lead named opus-5.0 (case-insensitive)
+  #     scanIntervalSeconds: 10      # rescan cadence, and the worst case before a new tab is seen
+  #     workspace: leads             # where a launched lead's tab is created (default "leads").
+  #                                  # MUST NOT be a member workspace — those are excluded from the
+  #                                  # scan, so a lead placed in one is never found again.
+  #     cwd: /path/to/repo           # the launched lead's working directory (default: bridged's own)
+  #     kind: claude                 # descriptive; reported by bridge_whoami
+  #   gpt-sol-5.6:
+  #     terminal: term_fedcba9876543
+  #     kind: opencode
+  #     model: openai/gpt-5.6-terra
+
+  # architects:
+  #   architect-1:
+  #     profile: opus                # a strong model, on the operator's subscription
+  #   architect-2:
+  #     profile: sol                 # a different vendor on purpose — two architects that share a
+  #                                  # model share its blind spots
+  developers:
+    gx10:
+      profile: gx10
+  # reviewers:
+  #   gx10:
+  #     profile: gx10                # the same backend may serve two roles; that is the point
 
 # Subscription boundary. A worker's base_url host MUST be one of these; the primary
-# must carry none. Grounded in ltms-local's real endpoints.
+# must carry none. Every profile above must have its host listed here.
 guard:
   offSubscriptionHosts:
     - gx00.gw
-    - ollama.ltms.dev
+    - gx01.gw
+
+# Spawn-readiness gate (CB-306). The launcher blocks until the worker's herdr status is
+# injectable (IDLE/BLOCKED/DONE) or the timeout elapses. 0 disables the gate.
+# NOTE: keys are camelCase — config is bound by plain Jackson with no naming strategy and
+# unknown keys are ignored, so a snake_case key would be silently dropped (default kept).
+# spawnReadyTimeoutMs: 20000
+# spawnReadyPollMs: 300
+
+# Worktree provisioning root (CB-301-ext). Where per-worker git worktrees are checked out so
+# each worker owns an isolated branch instead of sharing the primary's tree. Omit to default
+# to a sibling directory of the repo root.
+# worktreeRoot: /Users/me/src/.bridged-worktrees
+
+# Session lifecycle limits (CB-303). All knobs are opt-in; omit or set to null to keep
+# the feature disabled. By default the daemon never reaps, caps, or drains sessions.
+#   idleTtlSeconds     → reap READY/DONE sessions idle longer than this (never BUSY/SPAWNING)
+#   contextCap         → force-release a session after this many delegated turns
+#   drainTimeoutSeconds → seconds to wait for BUSY sessions on shutdown before forced teardown
+# lifecycle:
+#   idleTtlSeconds: 300
+#   contextCap: 10
+#   drainTimeoutSeconds: 5
+
+# Durable reply delivery (CB-307 Stage 2). OMIT this block entirely to keep the default
+# in-memory, soft-state reply inbox (late worker replies are held only until a daemon bounce).
+# Set a broker uri to swap in the AMQP-backed inbox: worker replies with no open send are held
+# on a durable per-target queue (agent.<target>.inbox) and survive a restart — the broker
+# redelivers anything the primary had not yet drained. Production default is LavinMQ; a stock
+# RabbitMQ speaks the same AMQP 0-9-1, so it is a URI-only swap.
+#   uri → AMQP connection URI. No trailing slash ⇒ the default vhost "/"; an empty path ("/")
+#         is vhost "" and will NOT connect. Encode a named vhost as .../%2Fmyvhost.
+# broker:
+#   uri: amqp://guest:guest@127.0.0.1:5672
+
+# Active push-to-primary (CB-307 Stage 3). When a worker reply lands with no open bridge_send,
+# the ReplyPushLoop injects a *drain nudge* (never the payload) into the primary's own herdr
+# pane — status-gated (only when injectable, never mid-turn) and bounded. Ack = drain: the loop
+# stops as soon as the primary's inbox is empty.
+#   terminal       → pin the primary's herdr terminal id. Omit to learn it from the connection on
+#                    the first orchestration-side MCP call (the normal case). An off-host or
+#                    non-herdr primary leaves this unresolved → the loop is a no-op and delivery
+#                    degrades to pull; the reply is still never lost.
+#
+#                    REQUIRED (CB-522) if the primary itself runs inside a herdr pane. Caller
+#                    identity resolves a loopback PID to its herdr pane, and PaneLocator scans
+#                    EVERY pane — not just bridged-spawned ones — so such a primary is otherwise
+#                    classified as a WORKER and refused SPAWN/SEND/STOP. That failure is
+#                    self-locking: the learned terminal is populated by the very orchestration
+#                    calls being refused, so only this pinned value can break the cycle. Read the
+#                    id off bridge_whoami (it reports the current terminal even while
+#                    misclassified) and re-pin whenever the primary moves panes.
+#   pushReminders  → max nudges before giving up (default 5)
+#   pushBackoffMs  → delay between nudges in ms (default 15000)
+# primary:
+#   terminal: term_65619bd6174568
+#   pushReminders: 5
+#   pushBackoffMs: 15000

bridged/docs/CB-307-Push-Loop.md

@@ -0,0 +1,142 @@
+# CB-307 — Active push-to-primary + reminder loop (the reliability layer)
+
+**Status:** design (2026-07-19). Builds directly on the shipped durable landing zone
+(`AmqpReplyInbox`, main `2bc5f3a`, dogfooded live). gitea #5.
+
+## Why this exists
+
+Stage 2 gave a worker→primary reply a **durable place to wait** when no `bridge_send` is
+open: it lands in `agent.<target>.inbox` on the broker and survives a daemon bounce. But
+delivery is still **pull** — the primary only sees the reply if it happens to call
+`bridge_poll(target)` / `GET /sessions/{id}/replies`. A reply can sit indefinitely while
+the primary works on something else.
+
+This layer makes delivery **active**: the bridge *pushes* a nudge to the primary the moment
+a reply lands, and keeps reminding (bounded) until the primary drains it. At-least-once,
+dedup by `msgId`, and — critically — it never loses the reply even if every push fails,
+because the durable inbox is the backstop.
+
+## The hard constraint it works around
+
+The bridge is an MCP **server**; the primary is an MCP **client**. A server cannot call
+into a client. So "push to the primary" cannot be an MCP response — it needs a *sideband*
+channel. The chosen channel: **inject a synthetic user-turn into the primary's own herdr
+terminal pane** — the same mechanism the bridge already uses to deliver tasks to workers,
+pointed at the primary's pane instead.
+
+```mermaid
+flowchart LR
+    W["worker"] -->|"bridge_reply (no open send)"| MS["MessageService.reply"]
+    MS -->|"inbox.publish"| INBOX[("agent.&lt;target&gt;.inbox<br/>(durable, LavinMQ)")]
+    MS -->|"notify"| LOOP["ReplyPushLoop"]
+    LOOP -->|"status-gated inject"| PANE["primary's herdr pane"]
+    PANE -->|"primary drains"| DRAIN["bridge_poll(target)<br/>= peek + ack"]
+    DRAIN -->|"inbox now empty"| LOOP
+    LOOP -.->|"still non-empty →<br/>re-inject on backoff"| PANE
+    classDef store fill:#2c5282,stroke:#1a365d,color:#ffffff;
+    class INBOX store
+```
+
+*Figure 1 — a reply lands in the durable inbox; the push loop nudges the primary's pane;
+the primary's drain acks it; a still-full inbox triggers a bounded re-nudge.*
+
+## Three increments
+
+### Increment 1 — learn & store the primary's terminal_id
+
+**Finding (seam map):** `ConnectionIdentity.resolve(remoteAddr, remotePort)` already returns
+the caller's herdr `terminal_id` for *every* MCP call, via `PaneLocator.terminalForPid`
+(walks `pane.list`, matches the caller PID to a pane's process tree). It is non-null whenever
+the caller runs in a herdr pane on this host. Today it's discarded for the primary
+(`presence.markPresent` is a no-op on it).
+
+**Plan:** a single-slot `PrimaryRegistry` (thread-safe) holding the primary's `terminal_id`.
+Populate it from the **orchestration-side** MCP tools — `bridge_send`, `bridge_spawn`,
+`bridge_poll`, `bridge_list`, `bridge_status`, `bridge_profiles` — capturing
+`callerTerminal(exchange)` when it is (a) non-null and (b) **not** a registered worker
+session in `SessionManager`. That caller is, by construction, the primary. Worker-side tools
+(`bridge_reply`, `bridge_ask`) never set it.
+
+- **Config override / pin:** a `primary: { terminal: "<id>" }` block in `BridgedConfig`
+  (nested record, same shape as `Broker`). Lets an operator pin it, or supply it when
+  derivation can't (see degrade case).
+- **Degrade:** if the primary is off-host or in a non-herdr terminal, `terminalForPid`
+  returns null and no override is set → **the registry stays empty → the push loop is a
+  no-op and we fall back to pull** (today's behaviour). The reply is never lost; it's just
+  not actively pushed. This is a safe, explicit degradation, not a failure.
+
+### Increment 2 — the push loop
+
+A `ReplyPushLoop` component, notified at the single no-waiter call site
+(`MessageService.reply` → the `inbox.publish` branch, `MessageService.java:192`).
+
+- **Inject a nudge, not the payload.** The injected turn tells the primary *to drain*
+  (e.g. "Worker `<target>` returned a reply — run `bridge_poll(target=<target>)` to collect
+  it"), it does **not** carry the reply text. Rationale: replies can be large/multiline and
+  terminal injection would mangle them; the drain response is the clean transport. Keeps the
+  push idempotent — re-nudging is harmless.
+- **Ack = drain.** The primary draining (`drainReplies` = peek + ack) is the acknowledgement.
+  The loop's **stop condition is `inbox.peek(target).isEmpty()`** — the reply is gone from the
+  inbox because it was acked. No new `bridge_ack` tool needed for v1 (see Increment 3).
+- **Status-gated injection (mechanism (b), chosen).** A dedicated lightweight scheduled loop,
+  **not** the worker `Injector`. It injects via `AgentControl.send(primaryTerminal, nudge)`
+  (the same herdr `agent.send` = `pane send-text` + submit that delivers to workers) only when
+  `AgentControl.status(primaryTerminal).injectable()` (IDLE/BLOCKED) — never mid-turn. This keeps
+  the primary path fully isolated from `WorkerPresence`/`StatusPoller` (which are worker-scoped),
+  and makes it unit-testable with a fake `AgentControl` + an injected clock (per the CB-306
+  `LongSupplier` clock + `Runnable` sleeper seam). Rejected (a) reuse-the-Injector: it would force
+  the primary terminal into the worker poller set and couple to worker-presence semantics — more
+  integration surface, harder to test, no real gain for a bounded reminder.
+- **Bounded reminder / backoff.** While `peek(target)` stays non-empty, re-inject on a
+  backoff schedule up to a cap (N reminders or a max duration; config
+  `primary.push_reminders` / `primary.push_backoff_ms`). After the cap, **stop reminding** —
+  the reply remains in the durable inbox and the next natural poll (or a later worker reply's
+  nudge) still surfaces it. Bounded so the bridge never spams the primary.
+
+### Increment 3 — optional per-`msgId` `bridge_ack` tool (deferred)
+
+Drain-as-ack is coarse: it clears *all* pending replies for a target at once. If finer
+control is ever needed (ack one reply, leave others held), add a `bridge_ack(msgId)` tool
+mapping to `inbox.ack(target, msgId)` — the port already supports per-`msgId` ack. Not built
+in v1; the stop-on-empty loop is sufficient.
+
+## The two subtleties (decided here)
+
+1. **Which caller is "the primary"?** Connection-derived, not self-reported: the caller whose
+   resolved terminal is non-null **and not a registered worker session**, seen on an
+   orchestration-side tool. This never mislabels a worker (workers are in `SessionManager`)
+   and needs no new env var or argument (identity stays connection-derived, per the existing
+   `BridgeMcp` invariant).
+
+2. **Readiness-gate mismatch → dedicated loop.** The existing `Injector` gates delivery on
+   `ready.test(target)` = `WorkerPresence` (the *worker's* MCP connected). The primary is not
+   in `WorkerPresence`, so reusing `Injector` would mean forcing the primary terminal into the
+   worker `StatusPoller` set and swapping the `ready` predicate — extra integration surface with
+   worker-scoped machinery. Decision: **mechanism (b)** — a small dedicated scheduled loop that
+   calls `AgentControl.status(primaryTerminal).injectable()` then `AgentControl.send(...)`, with
+   an injected clock. Isolated from worker presence, trivially unit-testable, sufficient for a
+   bounded reminder. (Verified live: this primary resolves to `term_656c8cc03e1f0b1`, pane
+   `w2:pY` — the primary genuinely runs in a herdr pane on this host, so the path is exercisable.)
+
+## Boundary note
+
+This is the first time the bridge **writes into the primary's pane** — a new direction of
+control. It stays within the communication-bus identity: the injection is a **nudge** (a
+synthetic "go drain your replies" turn), **status-gated** so it never interrupts a turn,
+**bounded** so it never spams, carries **no env** and **never crosses the subscription
+boundary**. The bridge is signalling the primary that it has mail — not driving its work.
+
+## Test plan
+
+- **Unit (hermetic):** `PrimaryRegistry` set/clear/override; the "caller is primary iff
+  non-null terminal AND not a registered session" predicate; the loop's stop-on-empty and
+  bounded-reminder logic with an injected clock + a fake injector (no real herdr).
+- **Live dogfood (primary-side):** with the daemon on the broker jar + a real worker,
+  delegate a task, let the worker reply after the `bridge_send` window closes, and observe the
+  bridge inject a drain nudge into *this* primary pane; confirm draining stops the reminders;
+  confirm an unreachable primary (registry empty) degrades to pull with no loss.
+
+## Out of scope
+
+Multi-host (CB-308) — the push loop is local-only; a remote primary is reached by its own
+local gateway, not cross-host injection. Federation reuses this loop per-gateway.

bridged/pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>dev.ltms</groupId>
     <artifactId>bridged</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
+    <version>1.0.0</version>
     <packaging>jar</packaging>
 
     <name>bridged</name>
@@ -17,13 +17,74 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <mainClass>dev.ltms.bridged.Bridged</mainClass>
 
-        <jackson.version>2.18.2</jackson.version>
-        <javalin.version>6.3.0</javalin.version>
+        <jackson.version>2.19.0</jackson.version>
+        <javalin.version>6.7.0</javalin.version>
+        <jetty.version>11.0.25</jetty.version>
+        <mcp.version>2.0.0</mcp.version>
         <slf4j.version>2.0.16</slf4j.version>
-        <logback.version>1.5.15</logback.version>
+        <logback.version>1.5.18</logback.version>
         <junit.version>5.11.4</junit.version>
+        <amqp.version>5.22.0</amqp.version>
+        <testcontainers.version>1.20.4</testcontainers.version>
+        <commons-compress.version>1.27.1</commons-compress.version>
+        <commons-lang3.version>3.18.0</commons-lang3.version>
     </properties>
 
+    <!--
+      Dependency security (validate with the JetBrains analyzer's Mend.io check on this pom).
+      Deps are pinned to the latest available versions. Residual advisories with NO upstream fix,
+      accepted for this loopback-bound daemon that processes no untrusted config:
+        - jetty-http 11.0.25 (via Javalin): CVE-2026-2332, CVE-2025-11143 — Jetty 11 is EOL;
+          fixed only in Jetty 12, which needs a Javalin major (6.x rides Jetty 11).
+        - logback-core 1.5.18: CVE-2025-11226, CVE-2026-1225 — both require a MALICIOUS
+          logback.xml (attacker with config write already has code execution); ours is trusted.
+        - jackson-core 2.19.0: WS-2026-0003 — "insufficient information", no fixed version published.
+        - tools.jackson.core (Jackson 3) 3.0.3 via the MCP SDK: CVE-2026-29062 (nesting-depth
+          resource exhaustion). The SDK 2.0.0 is pinned to Jackson 3.0.3 + jackson-annotations
+          3.0-rc5; bumping Jackson 3 to the patched 3.2.x breaks the SDK (annotation mismatch).
+          Only the loopback /mcp endpoint parses this JSON, from trusted local Claude clients.
+      The 11.0.23 -> 11.0.25 bump did clear jetty CVE-2024-8184 (5.9) and CVE-2024-6763.
+    -->
+
+    <!-- Force the latest patched Jetty 11.x across all Javalin-pulled Jetty modules (no version
+         skew). Javalin 6.x rides Jetty 11; a move to Jetty 12 needs a Javalin major. -->
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.eclipse.jetty</groupId>
+                <artifactId>jetty-bom</artifactId>
+                <version>${jetty.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+            <!-- The MCP SDK (Jackson 3) needs jackson-annotations with JsonFormat.Shape.POJO
+                 (the 3.0 line); it shares the com.fasterxml.jackson.annotation package with our
+                 Jackson 2.19 databind, so both must resolve to the same jar. 3.0 is built to work
+                 with Jackson 2.19 databind too — pin it to reconcile the two. -->
+            <dependency>
+                <groupId>com.fasterxml.jackson.core</groupId>
+                <artifactId>jackson-annotations</artifactId>
+                <version>3.0-rc5</version>
+            </dependency>
+            <!-- Testcontainers 1.20.4 pulls commons-compress 1.24.0 (test scope), which carries
+                 CVE-2024-25710 (8.1) + CVE-2024-26308 — both fixed in 1.26.0. Pin the patched line.
+                 Test-scope only (never shipped in the jar), but bumped per the CVE policy. -->
+            <dependency>
+                <groupId>org.apache.commons</groupId>
+                <artifactId>commons-compress</artifactId>
+                <version>${commons-compress.version}</version>
+            </dependency>
+            <!-- Testcontainers 1.20.4 also pulls commons-lang3 3.16.0 (test scope): CVE-2025-48924
+                 (uncontrolled recursion in ClassUtils), fixed in 3.18.0. Pin the patched line.
+                 Test-scope only (never shipped in the jar), bumped per the CVE policy. -->
+            <dependency>
+                <groupId>org.apache.commons</groupId>
+                <artifactId>commons-lang3</artifactId>
+                <version>${commons-lang3.version}</version>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
     <dependencies>
         <!-- JSON + YAML (config, herdr wire format, REST bodies) -->
         <dependency>
@@ -44,6 +105,24 @@
             <version>${javalin.version}</version>
         </dependency>
 
+        <!-- MCP server: the SERVER face. Streamable-HTTP servlet mounted on Javalin's Jetty at
+             /mcp, exposing bridge_send/bridge_reply/bridge_status as thin adapters over REST. -->
+        <dependency>
+            <groupId>io.modelcontextprotocol.sdk</groupId>
+            <artifactId>mcp</artifactId>
+            <version>${mcp.version}</version>
+        </dependency>
+
+        <!-- Broker client (CB-307 Stage 2): AMQP 0-9-1. Default deploy targets LavinMQ; this same
+             client speaks to RabbitMQ unchanged (URI-only swap), so integration tests run against a
+             stock RabbitMQ container. Only wired when a broker: block is present in config; absent →
+             the in-memory ReplyInbox. -->
+        <dependency>
+            <groupId>com.rabbitmq</groupId>
+            <artifactId>amqp-client</artifactId>
+            <version>${amqp.version}</version>
+        </dependency>
+
         <!-- Logging -->
         <dependency>
             <groupId>org.slf4j</groupId>
@@ -63,6 +142,22 @@
             <version>${junit.version}</version>
             <scope>test</scope>
         </dependency>
+
+        <!-- Testcontainers RabbitMQ: spins a real broker for the @Tag("contract") AMQP integration
+             test only. Excluded from the default build (contract group), so `mvn clean install`
+             stays hermetic and green without Docker; run under -Pcontract with Docker present. -->
+        <dependency>
+            <groupId>org.testcontainers</groupId>
+            <artifactId>rabbitmq</artifactId>
+            <version>${testcontainers.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.testcontainers</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <version>${testcontainers.version}</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>
@@ -74,6 +169,30 @@
                 <version>3.14.0</version>
             </plugin>
 
+            <!--
+              Coverage (CB-509). Build-time tooling only — never a compile/runtime dependency, so
+              it adds nothing to the shipped jar. Report lands at target/site/jacoco/index.html and
+              target/site/jacoco/jacoco.csv. No `check` rule / threshold is wired: a coverage gate
+              rewards writing tests that execute lines, which is the failure mode this project is
+              trying to avoid, not encourage.
+            -->
+            <plugin>
+                <groupId>org.jacoco</groupId>
+                <artifactId>jacoco-maven-plugin</artifactId>
+                <version>0.8.13</version>
+                <executions>
+                    <execution>
+                        <id>prepare-agent</id>
+                        <goals><goal>prepare-agent</goal></goals>
+                    </execution>
+                    <execution>
+                        <id>report</id>
+                        <phase>test</phase>
+                        <goals><goal>report</goal></goals>
+                    </execution>
+                </executions>
+            </plugin>
+
             <!-- Unit tests run by default; contract tests (live herdr) are tag-excluded. -->
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
@@ -116,7 +235,27 @@
         </profile>
         <profile>
             <id>contract</id>
-            <properties><excludedGroups></excludedGroups></properties>
+            <properties><excludedGroups/></properties>
+            <build>
+                <plugins>
+                    <plugin>
+                        <artifactId>maven-surefire-plugin</artifactId>
+                        <configuration>
+                            <!-- Docker-engine compat (see "Running the contract tests" in
+                                 docs/CB-307-Reliable-Delivery.md): Testcontainers 1.20.4's docker-java
+                                 client defaults to Docker API 1.32 when no version is set, but modern
+                                 engines (OrbStack on this dev host, min 1.40) reject that as too old —
+                                 which surfaces as "Could not find a valid Docker environment". Pinning
+                                 api.version=1.43 works on OrbStack and Docker 24+, and is overridable
+                                 per-host via -Dapi.version. Only active under -Pcontract, so the
+                                 default hermetic build never sets it. -->
+                            <systemPropertyVariables>
+                                <api.version>1.43</api.version>
+                            </systemPropertyVariables>
+                        </configuration>
+                    </plugin>
+                </plugins>
+            </build>
         </profile>
     </profiles>
 </project>

bridged/src/main/java/dev/ltms/bridged/Bridged.java

@@ -1,19 +1,65 @@
 package dev.ltms.bridged;
 
 import dev.ltms.bridged.config.BridgedConfig;
+import dev.ltms.bridged.config.ConfigRef;
+import dev.ltms.bridged.config.ConfigWatcher;
 import dev.ltms.bridged.guard.SubscriptionGuard;
 import dev.ltms.bridged.herdr.AgentControl;
+import dev.ltms.bridged.herdr.HerdrClient;
+import dev.ltms.bridged.herdr.HerdrException;
+import dev.ltms.bridged.herdr.LeadTabScanner;
+import dev.ltms.bridged.lead.LeadLauncher;
+import dev.ltms.bridged.herdr.PaneLocator;
 import dev.ltms.bridged.herdr.UnixSocketHerdrClient;
 import dev.ltms.bridged.herdr.WorkspaceControl;
+import dev.ltms.bridged.inject.CompletionResolver;
 import dev.ltms.bridged.inject.Injector;
 import dev.ltms.bridged.inject.StatusPoller;
+import dev.ltms.bridged.inject.TurnListener;
+import dev.ltms.bridged.inject.MemberPresence;
+import dev.ltms.bridged.auth.MemberRegistry;
+import dev.ltms.bridged.auth.CallerResolver;
+import dev.ltms.bridged.mcp.BridgeMcp;
+import dev.ltms.bridged.mcp.ConnectionIdentity;
+import dev.ltms.bridged.metrics.BridgedMetrics;
+import dev.ltms.bridged.metrics.Metrics;
+import dev.ltms.bridged.mcp.PrimaryRegistry;
+import dev.ltms.bridged.mcp.LsofPeerPidLookup;
+import dev.ltms.bridged.mcp.LsofProcessCwdLookup;
+import dev.ltms.bridged.msg.AmqpReplyInbox;
+import dev.ltms.bridged.msg.InMemoryReplyInbox;
+import dev.ltms.bridged.msg.MessageService;
+import dev.ltms.bridged.msg.Rendezvous;
+import dev.ltms.bridged.msg.ReplyInbox;
+import dev.ltms.bridged.msg.LeadHeartbeatLoop;
+import dev.ltms.bridged.msg.ReplyPushLoop;
 import dev.ltms.bridged.rest.BridgedApp;
-import dev.ltms.bridged.worker.WorkerService;
+import dev.ltms.bridged.session.GitWorktrees;
+import dev.ltms.bridged.session.SessionManager;
+import dev.ltms.bridged.peer.PeerLauncher;
+import dev.ltms.bridged.session.SessionReaper;
+import dev.ltms.bridged.member.ClaudeCodeLauncher;
+import dev.ltms.bridged.member.CompositePeerLauncher;
+import dev.ltms.bridged.member.HerdrPeerLauncher;
+import dev.ltms.bridged.member.OpenCodeLauncher;
 import io.javalin.Javalin;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicReference;
+import java.util.function.Function;
+import java.util.function.Predicate;
+import java.util.function.Supplier;
+import java.util.stream.Collectors;
 
 /**
  * {@code bridged} entry point. Wires the real herdr socket client to the REST app and
@@ -24,41 +70,417 @@ public final class Bridged {
 
     private static final Logger log = LoggerFactory.getLogger(Bridged.class);
 
-    /** How often the injector samples a busy worker's status while it has queued work. */
-    private static final long INJECT_POLL_MILLIS = 250;
+    /** CB-504: how long to wait at startup for herdr's socket before serving degraded. */
+    private static final long HERDR_WAIT_SECONDS = 30;
+    private static final long HERDR_WAIT_POLL_MILLIS = 500;
 
     static void main(String[] args) {
         Path configPath = Path.of(args.length > 0 ? args[0] : "bridged.yaml");
         BridgedConfig cfg = BridgedConfig.load(configPath);
+        // CB-559: `cfg` stays the startup snapshot — every validation and every piece of one-time
+        // wiring below reads it, and must, because those decisions cannot be unmade. `config` is the
+        // live reference the hot paths read per use. Which keys can actually move is ConfigRef's
+        // contract; adding a reader here does not make a key reloadable by itself.
+        ConfigRef config = new ConfigRef(configPath, cfg);
 
         // The primary/host env that launched bridged must not be tainted.
         SubscriptionGuard guard = new SubscriptionGuard(cfg.guard().hostSet());
         guard.assertPrimaryClean(System.getenv());
 
+        // CB-501: refuse to start if the bind is wider than the auth mode can defend. Under
+        // loopback-trust, "not a known worker" means "the primary" — sound only because the OS
+        // refuses remote connections to a loopback socket. This throws rather than warns so the
+        // dangerous configuration cannot be reached by ignoring a log line.
+        cfg.validateAuthExposure();
+        cfg.validateLeadTabPrefixes();
+        // CB-542: a subscription:true profile whose env: reseats ANTHROPIC_BASE_URL/AUTH_TOKEN would
+        // reach an unguarded endpoint (the launcher skips SubscriptionGuard for it). Refuse at load.
+        cfg.validateSubscriptionProfiles();
+        cfg.validateCharters();
+        // CB-548: every architect slot must name a configured workers: profile — the strong-model
+        // backend the future spawn lifecycle would read. A stale reference dies here, not later.
+        cfg.validateMembers();
+
         Path socket = cfg.herdrSocket() != null && !cfg.herdrSocket().isBlank()
                 ? Path.of(cfg.herdrSocket())
                 : UnixSocketHerdrClient.defaultSocketPath();
 
         UnixSocketHerdrClient herdr = UnixSocketHerdrClient.connect(socket, new com.fasterxml.jackson.databind.ObjectMapper());
-        Runtime.getRuntime().addShutdownHook(new Thread(herdr::close));
 
         AgentControl agents = new AgentControl(herdr);
         WorkspaceControl spaces = new WorkspaceControl(herdr);
-        WorkerService workers = new WorkerService(agents, spaces, guard, cfg.worker(), System::getenv);
+        // CB-402: one adapter per configured peer kind, fronted by a composite router. A profile's
+        // `kind:` selects its adapter — claude-code (the default) and opencode partition the profile
+        // set — and the composite dispatches each SPI call to the adapter that owns the profile/pane.
+        Map<String, BridgedConfig.Profile> claudeProfiles = new LinkedHashMap<>();
+        Map<String, BridgedConfig.Profile> opencodeProfiles = new LinkedHashMap<>();
+        cfg.profiles().forEach((name, w) -> {
+            if (w.isOpenCode()) {
+                opencodeProfiles.put(name, w);
+            } else {
+                claudeProfiles.put(name, w);
+            }
+        });
+        List<HerdrPeerLauncher> adapters = new ArrayList<>();
+        // The claude-code adapter is the always-present default; keep it even with no profiles (so a
+        // bridge configured with no workers, or opencode-only, still has a well-defined base adapter)
+        // unless opencode is the only kind configured.
+        if (!claudeProfiles.isEmpty() || opencodeProfiles.isEmpty()) {
+            adapters.add(new ClaudeCodeLauncher(agents, spaces, guard,
+                    claudeProfiles, cfg.effectiveDefaultProfile(), System::getenv,
+                    cfg.spawnReadyTimeoutMs(), cfg.spawnReadyPollMs(),
+                    () -> config.get().fleet()));
+        }
+        if (!opencodeProfiles.isEmpty()) {
+            adapters.add(new OpenCodeLauncher(agents, spaces,
+                    opencodeProfiles, cfg.effectiveDefaultProfile(), System::getenv,
+                    cfg.spawnReadyTimeoutMs(), cfg.spawnReadyPollMs(),
+                    () -> config.get().fleet()));
+        }
+        AtomicReference<Function<String, Integer>> liveCountRef = new AtomicReference<>(_ -> 0);
+        PeerLauncher workers = new CompositePeerLauncher(
+                adapters,
+                cfg.effectiveDefaultProfile(),
+                config,
+                profileName -> liveCountRef.get().apply(profileName));
+        // CB-504: under supervision (launchd/systemd) bridged can start before herdr's socket
+        // exists. The client itself is lazy — it connects per call — but the orphan reap below is
+        // the first thing that actually talks to herdr, so without this wait a boot-order race
+        // would crash the daemon into a restart loop. Wait, then degrade rather than die: serving
+        // with /healthz reporting "degraded" is strictly more useful than exiting.
+        boolean herdrUp = awaitHerdr(herdr);
+        if (herdrUp) {
+            // CB-117: herdr keeps worker panes alive across a daemon restart, and their ids died
+            // with the previous process — reap those leaked orphans now, before we start serving.
+            workers.reapOrphanWorkers();
+        } else {
+            log.warn("herdr did not answer within {}s — starting anyway; /healthz will report "
+                    + "degraded until it comes up. Orphaned worker panes (if any) were NOT reaped.",
+                    HERDR_WAIT_SECONDS);
+        }
+
+        // CB-301: authoritative session registry + lifecycle FSM on top of ClaudeCodeLauncher.
+        // CB-301-ext: worktree provisioning seam, optionally rooted at a configured directory.
+        // CB-303 part 2: context cap is opt-in and disabled (0) when absent/null.
+        int contextCap = 0;
+        if (cfg.lifecycle() != null && cfg.lifecycle().contextCap() != null
+                && cfg.lifecycle().contextCap() > 0) {
+            contextCap = cfg.lifecycle().contextCap();
+        }
+        boolean clearAfterTurn = cfg.lifecycle() != null && cfg.lifecycle().clearAfterTurn();
+        SessionManager sessions = new SessionManager(workers, new GitWorktrees(cfg.worktreeRoot()),
+                System::nanoTime, contextCap, clearAfterTurn);
+        liveCountRef.set(profileName -> (int) sessions.roster().stream()
+                .filter(s -> profileName.equals(s.profile()))
+                .count());
+
+        // CB-303 part 1: idle-ttl reaper — only when configured, defaults to disabled.
+        final SessionReaper reaper;
+        if (cfg.lifecycle() != null
+                && cfg.lifecycle().idleTtlSeconds() != null
+                && cfg.lifecycle().idleTtlSeconds() > 0) {
+            reaper = new SessionReaper(sessions, cfg.lifecycle().idleTtlSeconds());
+            reaper.start();
+        } else {
+            reaper = null;
+        }
+
+        // CB-530: every pane the config names as a lead, merged from `leaders:` and the legacy
+        // singular pin. PrimaryRegistry below still tracks ONE terminal — it addresses the push
+        // loop's nudges, which need a single destination — so it keeps the legacy pin.
+        Map<String, String> leadTerminals = cfg.leaderTerminals();
+        if (leadTerminals.size() > 1) {
+            log.info("leads: {} panes recognised {}", leadTerminals.size(), leadTerminals.values());
+        }
+        // CB-531: on top of the static registry, discover leads by the tab labels the operator
+        // writes. CB-557 moved the settings onto the lead they describe, so scanning is on whenever
+        // a `fleet.leaders:` entry exists — with no leads configured the supplier is a constant and
+        // never touches herdr, exactly as a missing `leadScan:` block used to behave.
+        final Supplier<Map<String, String>> leads;
+        var leaders = cfg.fleet().leaders();
+        if (!leaders.isEmpty()) {
+            // One scanner, so one prefix and one interval. Distinct per-lead prefixes would need a
+            // scanner each; until a config actually wants that, take the first entry's settings and
+            // say so, rather than silently honouring one lead's prefix and dropping another's.
+            var scan = leaders.values().iterator().next();
+            Set<String> memberSpaces = cfg.profiles().values().stream()
+                    .map(BridgedConfig.Profile::workspace)
+                    .filter(Objects::nonNull)
+                    .collect(Collectors.toSet());
+            leads = new LeadTabScanner(herdr, scan.tabPrefix(), memberSpaces, leadTerminals,
+                    TimeUnit.SECONDS.toNanos(scan.scanIntervalSeconds()), System::nanoTime);
+            log.info("lead scan: tabs labelled '{}…' host a lead (rescan every {}s, member spaces {} "
+                            + "excluded)",
+                    scan.tabPrefix(), scan.scanIntervalSeconds(), memberSpaces);
+            long distinctPrefixes = leaders.values().stream()
+                    .map(BridgedConfig.Leader::tabPrefix).distinct().count();
+            if (distinctPrefixes > 1) {
+                log.warn("fleet.leaders declares {} different tabPrefix values; only '{}' is scanned "
+                                + "for. Give every lead the same tabPrefix, or leads under the others "
+                                + "will not be discovered.",
+                        distinctPrefixes, scan.tabPrefix());
+            }
+        } else {
+            leads = () -> leadTerminals;
+        }
+
+        // CB-558: start any declared lead that is not already running. After the scanner is built,
+        // because both read the same tab labels and the ordering makes that dependency visible; and
+        // only when herdr answered, because the launcher's whole safety property is that it can
+        // count live leads first — it must never guess and risk a second orchestrator.
+        if (herdrUp && !leaders.isEmpty()) {
+            int launched = new LeadLauncher(agents, spaces, cfg).ensureLeads();
+            if (launched > 0) {
+                log.info("lead auto-launch: {} lead(s) started", launched);
+            }
+        }
+
+        // CB-548: config-declared architect slots. Config supplies only the stable name → profile
+        // map; the terminal → slot binding is owned by the registry and is empty at startup, so no
+        // pane resolves to an architect until the later spawn lifecycle binds one. The registry is
+        // what CallerResolver resolves against and what that lifecycle will read profiles from;
+        // nothing here spawns a slot.
+        MemberRegistry members = new MemberRegistry(cfg.fleet());
+        sessions.setMemberLifecycle(members);
+        if (!members.slots().isEmpty()) {
+            log.info("member slots: {} configured {} — none bound yet (a slot is idle until the "
+                            + "spawn lifecycle binds a live terminal to it)",
+                    members.slots().size(), members.slots().keySet());
+        }
 
         // Status-gated injector (CB-103): the single writer into workers, fed by a poller.
         // The blocking message endpoint (CB-104) is the producer; the poller is inert until then.
-        Injector injector = new Injector(agents);
-        StatusPoller poller = new StatusPoller(agents, injector, INJECT_POLL_MILLIS);
-        poller.start();
-        Runtime.getRuntime().addShutdownHook(new Thread(poller::stop));
+        // CB-106: a confirmed turn completion resolves a blocked send whose worker never replied.
+        Rendezvous rendezvous = new Rendezvous();
+        CompletionResolver completion = new CompletionResolver(agents, rendezvous);
+        // CB-113: deliver only to an available worker (its MCP is connected), never its boot window.
+        // CB-301: the manager's presence bridge records availability and drives SPAWNING → READY.
+        MemberPresence presence = sessions.asPresence();
+        TurnListener turnListener = new TurnListener() {
+            @Override
+            public void onTurnComplete(String target) {
+                completion.onTurnComplete(target);
+                sessions.onTurnComplete(target);
+            }
 
-        Javalin app = new BridgedApp(herdr, workers).build();
+            @Override
+            public boolean hasPostTurnAction(String target) {
+                return sessions.hasPostTurnAction(target);
+            }
+
+            @Override
+            public boolean onTurnCompleteWithPostAction(String target) {
+                completion.resolveBeforePostAction(target);
+                return sessions.onTurnCompleteWithPostAction(target);
+            }
+
+            @Override
+            public void onDelivered(String target) {
+                completion.onDelivered(target);
+                sessions.onDelivered(target);
+            }
+
+            @Override
+            public void onTurnFailed(String target) {
+                completion.onTurnFailed(target);
+                sessions.onTurnFailed(target);
+            }
+        };
+        Injector injector = new Injector(agents, turnListener, deliverableTo(presence, leads),
+                presence::forget);
+        StatusPoller poller = new StatusPoller(agents, injector, Injector.POLL_INTERVAL_MILLIS);
+        poller.start();
+
+        // CB-307: reply inbox. A broker: block (with a uri) selects the AMQP-backed durable adapter;
+        // absent, bridged stays soft-state on the in-memory inbox. The AMQP inbox owns a broker
+        // connection, so keep the reference to close it in the ordered shutdown hook.
+        final ReplyInbox replyInbox;
+        if (cfg.broker() != null && cfg.broker().isConfigured()) {
+            replyInbox = AmqpReplyInbox.open(cfg.broker().uri());
+            log.info("reply inbox: AMQP broker (durable) at {}", cfg.broker().uri());
+        } else {
+            replyInbox = new InMemoryReplyInbox();
+            log.info("reply inbox: in-memory (soft-state)");
+        }
+        // CB-307: learn the primary's terminal from orchestration tool calls (or pin from config).
+        // The pin also feeds CallerResolver below: a primary running inside a herdr pane would
+        // otherwise resolve as a worker and be refused every orchestration tool.
+        String pinnedPrimaryTerminal = cfg.primary() != null ? cfg.primary().terminal() : null;
+        PrimaryRegistry primaryRegistry = new PrimaryRegistry(pinnedPrimaryTerminal);
+        // CB-532: `primary.terminal` is superseded and no longer needed for either of its jobs —
+        // identity comes from `leaders:`/`leadScan:`, and reply nudges now follow the delegating
+        // lead. Say so once at startup rather than leaving a redundant pin to look load-bearing.
+        if (pinnedPrimaryTerminal != null && !pinnedPrimaryTerminal.isBlank()) {
+            log.warn("primary.terminal is DEPRECATED (CB-532) and can be deleted: identity now comes "
+                    + "from leaders:/leadScan:, and reply nudges follow the lead that delegated. "
+                    + "It still works, and is still the fallback nudge destination when a restart "
+                    + "has lost the delegation map. Its pushReminders/pushBackoffMs stay valid.");
+        }
+        // CB-307: active push-to-primary loop — nudge the primary when replies land without an
+        // open bridge_send. Uses its own lightweight scheduled executor, separate from the injector.
+        int maxReminders = cfg.primary() != null ? cfg.primary().remindersOrDefault() : 5;
+        long backoffMs = cfg.primary() != null ? cfg.primary().backoffMsOrDefault() : 15_000L;
+        var pushScheduler = Executors.newSingleThreadScheduledExecutor(r ->
+                Thread.ofVirtual().name("bridge-push-").unstarted(r));
+        // CB-502: the registry is built before the service and the push loop so send/reply outcomes
+        // are counted at their single funnel rather than at each of the two caller-facing surfaces.
+        // CB-512: the push loop takes it too, so nudge outcomes (delivered|exhausted) are counted.
+        Metrics metrics = BridgedMetrics.create(sessions, replyInbox);
+        var pushLoop = new ReplyPushLoop(primaryRegistry, agents, replyInbox,
+                pushScheduler, maxReminders, backoffMs, metrics);
+        // CB-551: idle-lead heartbeat. Opt-in; absent `leadHeartbeat:` this is never constructed, so
+        // an upgraded daemon cannot silently start spending subscription on nudging an idle lead.
+        // It has its own single-thread scheduler and holds its own scheduler shutdown via close().
+        final LeadHeartbeatLoop heartbeat;
+        var heartbeatScheduler = Executors.newSingleThreadScheduledExecutor(r ->
+                Thread.ofVirtual().name("bridge-heartbeat-").unstarted(r));
+        if (cfg.leadHeartbeat() != null) {
+            var hb = cfg.leadHeartbeat();
+            heartbeat = new LeadHeartbeatLoop(primaryRegistry, agents, replyInbox, sessions::roster,
+                    pushLoop, heartbeatScheduler, System::nanoTime,
+                    TimeUnit.SECONDS.toNanos(hb.idleAfterSeconds()), hb.backoffMs(), hb.quietNudgeCap(),
+                    metrics);
+            heartbeat.start();
+        } else {
+            heartbeat = null;
+            heartbeatScheduler.shutdownNow();
+        }
+        MessageService messages = new MessageService(agents, injector, rendezvous, replyInbox,
+                pushLoop, metrics);
+
+        // CB-520: the reply inbox only consumes for agents this gateway owns. own on acquire,
+        // release on teardown. Do this before CB-516 so the inbox is owned before any reply can land.
+        sessions.onAcquire(replyInbox::own);
+        // CB-516: releasing a worker must fail whatever send was waiting on it. Without this a
+        // torn-down delegation kept reporting PENDING until the 30-minute async timeout, and never
+        // reached /metrics — the delegation was unresolvable and nothing said so.
+        sessions.onRelease(terminal -> {
+            messages.abandon(terminal, "the worker session was released before it replied");
+            replyInbox.release(terminal);
+            primaryRegistry.forgetDelegation(terminal); // CB-532: don't leak the lead binding
+        });
+
+        // MCP server face (CB-105): bridge_send/bridge_reply/bridge_status, mounted at /mcp.
+        // Caller identity is resolved from the connection (peer PID → herdr pane), not arguments.
+        ConnectionIdentity identity = new ConnectionIdentity(
+                new PaneLocator(herdr), new LsofPeerPidLookup(), new LsofProcessCwdLookup());
+
+        // CB-501: one resolver behind both entry paths. Worker identity still comes from the
+        // connection and is never token-gated, so enabling token mode cannot lock the fleet out.
+        final CallerResolver callers;
+        if (cfg.auth().tokenMode()) {
+            String token = System.getenv(cfg.auth().tokenEnv());
+            if (token == null || token.isBlank()) {
+                throw new IllegalStateException("auth.mode=token but env var " + cfg.auth().tokenEnv()
+                        + " is unset or empty — export it before starting bridged");
+            }
+            callers = CallerResolver.withLeadsAndMembers(identity, true, token, leads, members);
+            log.info("auth: token mode (bearer required for non-worker callers, env {})",
+                    cfg.auth().tokenEnv());
+        } else {
+            callers = CallerResolver.withLeadsAndMembers(identity, false, null, leads, members);
+            log.info("auth: loopback-trust (any loopback non-worker caller is the primary)");
+        }
+
+        BridgeMcp mcp = new BridgeMcp(messages, workers, sessions, identity, presence,
+                primaryRegistry, callers, metrics);
+
+        // CB-559: opt-in config reload. With no `configReload:` block nothing is constructed, so an
+        // upgraded daemon behaves exactly as before — the file is read once at boot and never again.
+        final ConfigWatcher configWatcher;
+        if (cfg.configReload() != null && cfg.configReload().isEnabled()) {
+            configWatcher = new ConfigWatcher(config, cfg.configReload().intervalSeconds());
+            configWatcher.start();
+        } else {
+            configWatcher = null;
+        }
+
+        // CB-303 part 3: single ordered shutdown hook. Drain sessions first while herdr is still
+        // open (so releases reach the daemon), then stop poller/message/mcp/reaper, and close herdr
+        // last. This replaces the earlier independent hooks that could race and close herdr early.
+        Runtime.getRuntime().addShutdownHook(new Thread(() -> {
+            sessions.close(cfg.lifecycle() != null ? cfg.lifecycle().drainTimeoutSeconds() : null);
+            poller.stop();
+            messages.close();
+            pushLoop.close();
+            if (heartbeat != null) heartbeat.close(); // CB-551: stop the idle-lead heartbeat scheduler
+            if (configWatcher != null) configWatcher.stop(); // CB-559: stop polling the config file
+            mcp.close();
+            if (reaper != null) reaper.stop();
+            // Release the broker connection last among message resources (no-op for the in-memory inbox).
+            if (replyInbox instanceof AutoCloseable closeable) {
+                try {
+                    closeable.close();
+                } catch (Exception e) {
+                    log.debug("reply inbox close: {}", e.toString());
+                }
+            }
+            herdr.close();
+        }));
+
+        Javalin app = new BridgedApp(herdr, workers, sessions, messages, presence, mcp.servlet(),
+                callers, metrics).build();
         app.start(cfg.bind().host(), cfg.bind().port());
         log.info("bridged listening on {}:{}, herdr socket {}",
                 cfg.bind().host(), cfg.bind().port(), socket);
     }
 
+    /**
+     * The {@link Injector}'s readiness gate (CB-534): a target is deliverable if it is a spawned
+     * member whose agent has connected the bridge MCP, <em>or</em> a lead.
+     *
+     * <p>The gate exists for one reason — to hold a delivery out of a <em>spawned</em> member's boot
+     * window, where herdr already reports {@code idle} but the TUI would drop an injected paste. That
+     * hazard is a property of spawning. A lead is never spawned: the operator started it and named it
+     * (or labelled its tab) only once it was up, so there is no boot window to guard.
+     *
+     * <p>A lead is also never enrolled in {@link MemberPresence} — {@code BridgeMcp} marks presence
+     * for every spawned member (worker and architect), deliberately, since that map doubles as the
+     * member roster's availability signal and a lead counted there would show up as an available
+     * member. So without the second disjunct a lead is permanently un-deliverable: every
+     * lead→lead send sat on the gate for {@code READINESS_GRACE_POLLS} (~60s) and then failed
+     * having never been typed into the pane.
+     *
+     * <p>The lead set is read through the supplier on each call rather than snapshotted, so a lead
+     * discovered by {@code leadScan} after startup becomes deliverable without a restart.
+     */
+    static Predicate<String> deliverableTo(MemberPresence presence, Supplier<Map<String, String>> leads) {
+        return target -> presence.isPresent(target) || leads.get().containsKey(target);
+    }
+
+    /**
+     * Poll herdr's {@code ping} until it answers or {@link #HERDR_WAIT_SECONDS} elapses (CB-504).
+     *
+     * @return true if herdr answered, false if it never did
+     */
+    private static boolean awaitHerdr(HerdrClient herdr) {
+        long deadline = System.nanoTime() + HERDR_WAIT_SECONDS * 1_000_000_000L;
+        boolean waited = false;
+        while (true) {
+            try {
+                herdr.call("ping");
+                if (waited) {
+                    log.info("herdr is up");
+                }
+                return true;
+            } catch (HerdrException e) {
+                if (System.nanoTime() >= deadline) {
+                    return false;
+                }
+                if (!waited) {
+                    log.info("waiting up to {}s for the herdr socket…", HERDR_WAIT_SECONDS);
+                    waited = true;
+                }
+                try {
+                    Thread.sleep(HERDR_WAIT_POLL_MILLIS);
+                } catch (InterruptedException ie) {
+                    Thread.currentThread().interrupt();
+                    return false;
+                }
+            }
+        }
+    }
+
     private Bridged() {
     }
 }

bridged/src/main/java/dev/ltms/bridged/auth/AuditLog.java

@@ -0,0 +1,72 @@
+package dev.ltms.bridged.auth;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.time.Instant;
+import java.time.ZoneOffset;
+import java.time.format.DateTimeFormatter;
+
+/**
+ * Append-only record of privileged actions (CB-505).
+ *
+ * <p>Writes JSON lines to a dedicated {@code audit} logger — its own appender, separate from the
+ * chatty app log — so the trail stays greppable and can later be shipped without dragging debug
+ * noise along.
+ *
+ * <p><strong>Message content is never recorded.</strong> This bridge carries the user's source
+ * code, diffs, and prompts; an audit trail that quietly accumulated them would be a transcript
+ * archive wearing a security control's clothing. Records carry <em>who / what / against what /
+ * outcome</em> and correlation ids only.
+ */
+public final class AuditLog {
+
+    private static final Logger AUDIT = LoggerFactory.getLogger("audit");
+    private static final DateTimeFormatter TS =
+            DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSSXXX").withZone(ZoneOffset.UTC);
+
+    private AuditLog() {
+    }
+
+    /** Record an allowed action. */
+    public static void allowed(Principal caller, Authz.Action action, String target) {
+        write(caller, action, target, "allowed", null);
+    }
+
+    /** Record a refused action and why. */
+    public static void denied(Principal caller, Authz.Action action, String target, String reason) {
+        write(caller, action, target, "denied", reason);
+    }
+
+    /** Record an action that was authorized but then failed downstream (guard, timeout, herdr). */
+    public static void failed(Principal caller, Authz.Action action, String target, String reason) {
+        write(caller, action, target, "failed", reason);
+    }
+
+    private static void write(Principal caller, Authz.Action action, String target,
+                              String outcome, String reason) {
+        Principal c = caller != null ? caller : Principal.anonymous();
+        StringBuilder sb = new StringBuilder(200);
+        // The timestamp is built here rather than by the appender pattern: a pattern that wrapped
+        // literal braces around the message collides with logback's own variable substitution.
+        sb.append("{\"ts\":\"").append(TS.format(Instant.now())).append('"')
+                .append(",\"role\":\"").append(c.role()).append('"')
+                .append(",\"actor\":\"").append(esc(c.describe())).append('"')
+                .append(",\"pid\":").append(c.pid())
+                .append(",\"action\":\"").append(action).append('"')
+                .append(",\"target\":").append(target == null ? "null" : '"' + esc(target) + '"')
+                .append(",\"outcome\":\"").append(outcome).append('"');
+        if (reason != null) {
+            sb.append(",\"reason\":\"").append(esc(reason)).append('"');
+        }
+        sb.append('}');
+        // The appender supplies the timestamp, so it cannot disagree with the app log's clock.
+        AUDIT.info(sb.toString());
+    }
+
+    /** Minimal JSON string escaping — these values are ids and short reasons, never free text. */
+    private static String esc(String s) {
+        return s.replace("\\", "\\\\").replace("\"", "\\\"")
+                .replace("\n", "\\n").replace("\r", "\\r").replace("\t", "\\t");
+    }
+}

bridged/src/main/java/dev/ltms/bridged/auth/Authz.java

@@ -0,0 +1,82 @@
+package dev.ltms.bridged.auth;
+
+/**
+ * The authorization table (CB-505), stated once and enforced on both entry paths.
+ *
+ * <p>Most of these rules are already true de facto — {@code BridgeMcp} derives a worker's identity
+ * from the connection rather than reading it from an argument, so a worker has never been able to
+ * reply <em>as</em> another worker over MCP. What was missing is that the REST surface trusted the
+ * session id in the URL path, and neither surface checked role at all. This class makes the
+ * invariant explicit and testable rather than emergent.
+ */
+public final class Authz {
+
+    private Authz() {
+    }
+
+    /** A privileged operation, named for the audit trail. */
+    public enum Action {
+        /** Spawn a worker peer. */
+        SPAWN,
+        /** Tear a worker peer down. */
+        STOP,
+        /** Deliver a turn to a session (or answer a worker's question). */
+        SEND,
+        /** A worker's terminal reply for its own turn. */
+        REPLY,
+        /** A worker's mid-turn question to the primary. */
+        ASK,
+        /** Collect held replies from a session's inbox. */
+        DRAIN,
+        /** Read-only observation: status, roster, profiles, task polling. */
+        READ,
+        /** Scrape the metrics endpoint. */
+        METRICS
+    }
+
+    /**
+     * Whether {@code caller} may perform {@code action} against {@code targetSession}.
+     *
+     * @param targetSession the session id in the request path; only consulted for the worker-scoped
+     *                      actions ({@code REPLY}, {@code ASK}), ignored otherwise, may be
+     *                      {@code null}
+     */
+    public static boolean permits(Principal caller, Action action, String targetSession) {
+        if (caller == null || caller.isAnonymous()) {
+            return false; // authenticated as nothing ⇒ authorized for nothing
+        }
+        return switch (action) {
+            // Fleet lifecycle is the primary's alone — spawn, stop, drain. An architect
+            // deliberately does NOT get these (CB-548), so it cannot tear down or stand up workers
+            // even though it coordinates them; and a worker driving any of these would be a worker
+            // escalating into the orchestrator role.
+            case SPAWN, STOP, DRAIN -> caller.isPrimary();
+
+            // Delivering a turn is open to the primary and the architect: an architect delegates
+            // to workers (that is the role's point) but still has no lifecycle rights. A worker is
+            // excluded — sending would be it escalating.
+            case SEND -> caller.isPrimary() || caller.isArchitect();
+
+            // The load-bearing rule: a caller acts only as the pane it occupies. CB-532 widened who
+            // that can be — a lead answering another lead is replying for its OWN terminal, which
+            // this already permits — while the rule itself is unchanged, and is what stops anyone
+            // forging a reply for a rendezvous someone else is waiting on. An architect's own pane
+            // passes through the same check, so it can answer a funnel that delegated to it. An
+            // unnamed primary (token/loopback, no pane) owns nothing and is still excluded.
+            case REPLY, ASK -> caller.ownsSession(targetSession);
+
+            // Observation is open to every authenticated role: a worker legitimately polls its own
+            // status, and the roster carries no secrets.
+            case READ, METRICS -> caller.isPrimary() || caller.isWorker() || caller.isArchitect();
+        };
+    }
+
+    /**
+     * Why a request was refused, for the error body. Distinguishes "you are nobody" from "you are
+     * somebody, but not the right somebody" — the first is a credential problem (401), the second
+     * an authorization one (403).
+     */
+    public static boolean isUnauthenticated(Principal caller) {
+        return caller == null || caller.isAnonymous();
+    }
+}

bridged/src/main/java/dev/ltms/bridged/auth/CallerResolver.java

@@ -0,0 +1,272 @@
+package dev.ltms.bridged.auth;
+
+import dev.ltms.bridged.mcp.ConnectionIdentity;
+import dev.ltms.bridged.peer.MemberRole;
+
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
+import java.util.Map;
+import java.util.function.Function;
+import java.util.function.Supplier;
+
+/**
+ * Resolves every caller to a {@link Principal}, for both entry paths into the core (CB-501).
+ *
+ * <p>There are two of them and they are not layered the way the docs suggest: {@code BridgeMcp}
+ * calls the service layer directly and is mounted as a raw servlet (so it never passes through a
+ * Javalin filter), while the REST routes historically resolved no identity at all. Both now
+ * delegate here, so the authorization rules are stated once instead of drifting apart.
+ *
+ * <p><strong>Resolution order</strong> — connection identity first, token second, nothing third:
+ * <ol>
+ *   <li>A loopback peer PID that maps to a pane named by {@code leaders:}, by the legacy
+ *       {@code primary.terminal} pin, or by an operator-labelled lead tab (CB-307, CB-530, CB-531)
+ *       ⇒ {@link Role#PRIMARY}, carrying that lead's
+ *       name. The pane mapping is as unforgeable as a worker's, and the config explicitly names
+ *       that pane as a lead's own — without this rule a lead running <em>inside</em> a herdr pane
+ *       is misread as a worker and locked out of orchestration. More than one pane may be named,
+ *       so two leads can work as peers rather than one being demoted.</li>
+ *   <li>A loopback peer PID that maps to a pane bound to a CB-548 architect slot ⇒
+ *       {@link Role#ARCHITECT}, carrying the slot name. Just unforgeable as a worker's, and
+ *       resolved from the <em>live</em> terminal→slot binding (never a request argument), before
+ *       the generic worker fallback.</li>
+ *   <li>A loopback peer PID that maps to any other herdr pane ⇒ {@link Role#WORKER}. This is
+ *       unforgeable (the OS reports the PID, herdr owns the PID→pane map) and is honoured
+ *       regardless of auth mode, so enabling auth never breaks the fleet.</li>
+ *   <li>Otherwise, under {@code token} mode, a valid bearer token ⇒ {@link Role#PRIMARY}.</li>
+ *   <li>Otherwise, under {@code loopback-trust}, a loopback caller ⇒ {@link Role#PRIMARY}
+ *       (the historical behaviour, now an explicit configured choice).</li>
+ *   <li>Otherwise {@link Role#ANONYMOUS}.</li>
+ * </ol>
+ */
+public final class CallerResolver {
+
+    private final ConnectionIdentity identity;
+    private final boolean tokenMode;
+    private final byte[] expectedToken; // null unless tokenMode
+    /**
+     * terminal_id → lead name; empty when nothing is pinned. CB-530.
+     *
+     * <p>A supplier rather than a map because the registry is no longer fixed at startup: CB-531
+     * discovers leads by scanning herdr for operator-labelled tabs, so a lead that opens its tab
+     * after the daemon booted must still be recognised. Consulted per resolve; the scanner behind
+     * it is TTL-cached, so this is a map lookup in the common case.
+     */
+    private final Supplier<Map<String, String>> leadTerminals;
+    /**
+     * terminal_id → architect slot name; empty when nothing is configured. CB-548.
+     *
+     * <p>Like {@link #leadTerminals}, a supplier rather than a fixed map, so a binding injected
+     * after startup — when the later spawn lifecycle establishes a live architect session, or an
+     * operator pins one — takes effect without a restart. Consulted per resolve; today's wiring
+     * in {@code Bridged} reads a constant from config, which is the degenerate live case.
+     */
+    private final Supplier<Map<String, String>> architectTerminals;
+    private final Function<String, MemberRole> memberSlotRoles;
+    private final Function<String, String> memberSlotNames;
+
+    /** Loopback-trust resolver: no token required, historical behaviour. Test-only. */
+    CallerResolver(ConnectionIdentity identity) {
+        this(identity, false, null, Map.of());
+    }
+
+    /** As {@link #CallerResolver(ConnectionIdentity, boolean, String, Map)} with no leads pinned. Test-only. */
+    CallerResolver(ConnectionIdentity identity, boolean tokenMode, String token) {
+        this(identity, tokenMode, token, Map.of());
+    }
+
+    /**
+     * Single-pin form for the legacy {@code primary.terminal}-only configuration — one lead, named
+     * {@code primary}.
+     *
+     * <p>A static factory rather than a fourth constructor overload on purpose: {@code String} and
+     * {@code Map} overloads are ambiguous for a literal {@code null} argument, which is a compile
+     * error at the call site and exactly the shape "unpinned" is written in.
+     *
+     * @param pinnedPrimaryTerminal the primary's own herdr {@code terminal_id}
+     *                              ({@code null}/blank = unpinned)
+     */
+    static CallerResolver pinnedTo(ConnectionIdentity identity, boolean tokenMode,
+                                   String token, String pinnedPrimaryTerminal) {
+        return new CallerResolver(identity, tokenMode, token,
+                pinnedPrimaryTerminal == null || pinnedPrimaryTerminal.isBlank()
+                        ? Map.of() : Map.of(pinnedPrimaryTerminal, "primary"));
+    }
+
+    /**
+     * @param identity       connection-based worker identification
+     * @param tokenMode      when true, a non-worker caller must present a valid bearer token
+     * @param token          the expected bearer token; required (non-blank) when {@code tokenMode}
+     * @param leadTerminals  herdr {@code terminal_id} → lead name for every configured lead
+     *                       (CB-530). A caller resolving to one of these panes is that lead — a
+     *                       {@link Role#PRIMARY} — rather than a worker. Empty = nothing pinned,
+     *                       so every pane resolves as a worker.
+     */
+    CallerResolver(ConnectionIdentity identity, boolean tokenMode, String token,
+                   Map<String, String> leadTerminals) {
+        this(identity, tokenMode, token, fixed(leadTerminals), null);
+    }
+
+    /**
+     * Live-registry form: {@code leadTerminals} is consulted on every resolve, so leads discovered
+     * after startup (CB-531's tab scan) take effect without a restart.
+     *
+     * <p>A static factory rather than a fourth constructor overload, for the same reason as
+     * {@link #pinnedTo}: {@code Map} and {@code Supplier} overloads are ambiguous for a literal
+     * {@code null}.
+     */
+    static CallerResolver withLeads(ConnectionIdentity identity, boolean tokenMode,
+                                    String token,
+                                    Supplier<Map<String, String>> leadTerminals) {
+        return new CallerResolver(identity, tokenMode, token, leadTerminals, null);
+    }
+
+    /**
+     * Live registry form that can confirm a bound slot is an architect slot.
+     *
+     * <p>This is the only public construction path. It keeps terminal bindings and slot roles in
+     * the same {@link MemberRegistry}, so a configured architect can resolve as an architect.
+     */
+    public static CallerResolver withLeadsAndMembers(ConnectionIdentity identity,
+                                                       boolean tokenMode, String token,
+                                                       Supplier<Map<String, String>> leadTerminals,
+                                                       MemberRegistry members) {
+        return new CallerResolver(identity, tokenMode, token, leadTerminals,
+                members == null ? null : members::snapshot,
+                members == null ? null : members::roleForSlot,
+                members == null ? null : members::nameForSlot);
+    }
+
+    private static Supplier<Map<String, String>> fixed(Map<String, String> leadTerminals) {
+        Map<String, String> snapshot = leadTerminals == null ? Map.of() : Map.copyOf(leadTerminals);
+        return () -> snapshot;
+    }
+
+    private CallerResolver(ConnectionIdentity identity, boolean tokenMode, String token,
+                           Supplier<Map<String, String>> leadTerminals,
+                           Supplier<Map<String, String>> architectTerminals) {
+        this(identity, tokenMode, token, leadTerminals, architectTerminals, null);
+    }
+
+    private CallerResolver(ConnectionIdentity identity, boolean tokenMode, String token,
+                           Supplier<Map<String, String>> leadTerminals,
+                           Supplier<Map<String, String>> architectTerminals,
+                           Function<String, MemberRole> memberSlotRoles) {
+        this(identity, tokenMode, token, leadTerminals, architectTerminals, memberSlotRoles, null);
+    }
+
+    private CallerResolver(ConnectionIdentity identity, boolean tokenMode, String token,
+                           Supplier<Map<String, String>> leadTerminals,
+                           Supplier<Map<String, String>> architectTerminals,
+                           Function<String, MemberRole> memberSlotRoles,
+                           Function<String, String> memberSlotNames) {
+        if (tokenMode && (token == null || token.isBlank())) {
+            throw new IllegalArgumentException(
+                    "auth.mode=token requires a non-empty token; check that the env var named by "
+                            + "auth.tokenEnv is exported to the daemon's environment");
+        }
+        this.identity = identity;
+        this.tokenMode = tokenMode;
+        this.expectedToken = tokenMode ? token.getBytes(StandardCharsets.UTF_8) : null;
+        this.leadTerminals = leadTerminals == null ? Map::of : leadTerminals;
+        this.architectTerminals = architectTerminals == null ? Map::of : architectTerminals;
+        this.memberSlotRoles = memberSlotRoles == null ? _ -> null : memberSlotRoles;
+        this.memberSlotNames = memberSlotNames == null ? Function.identity() : memberSlotNames;
+    }
+
+    /**
+     * The currently-recognised leads, {@code terminal_id → name} (CB-535).
+     *
+     * <p>Deliberately read from the same supplier {@link #resolve} consults, rather than from a
+     * second copy handed to the roster: a lead that is <em>listed</em> but would not <em>resolve</em>
+     * (or the reverse) is an address a peer cannot actually reach, and the two answers drifting apart
+     * is precisely the confusion this exists to end. Live, so a lead discovered by the tab scan after
+     * startup appears without a restart.
+     */
+    public Map<String, String> leads() {
+        return leadTerminals.get();
+    }
+
+    /**
+     * The currently-recognised architect slots, {@code terminal_id → slot name} (CB-548).
+     *
+     * <p>Read from the same supplier {@link #resolve} consults, so a slot that is <em>listed</em>
+     * here but would not <em>resolve</em> (or the reverse) cannot drift apart. Live for the same
+     * reason as {@link #leads()}.
+     */
+    public Map<String, String> members() {
+        return architectTerminals.get();
+    }
+
+    /**
+     * Resolve the caller of a request.
+     *
+     * @param remoteAddr           the connection's remote address
+     * @param remotePort           the connection's remote port (used for the peer-PID lookup)
+     * @param authorizationHeader  the raw {@code Authorization} header, or {@code null}
+     */
+    public Principal resolve(String remoteAddr, int remotePort, String authorizationHeader) {
+        ConnectionIdentity.Caller c = identity.resolve(remoteAddr, remotePort);
+        if (c.terminal() != null) {
+            String lead = leadTerminals.get().get(c.terminal());
+            if (lead != null) {
+                // The config names this pane as a lead's own. The pane mapping is exactly as
+                // unforgeable as a worker's, so it outranks the token path — no credential needed.
+                // Checked before the architect registry so a pane named in BOTH is still the lead
+                // (CB-548 preserves every existing leader behaviour).
+                return Principal.leader(lead, c.terminal(), c.pid());
+            }
+            String slot = architectTerminals.get().get(c.terminal());
+            if (slot != null && memberSlotRoles.apply(slot) == MemberRole.ARCHITECT) {
+                // The config/live binding names this pane as an architect slot's own. Same
+                // unforgeable pane mapping; the live binding, never a request argument, decides.
+                // Check the slot role too: this defence in depth prevents a bad lifecycle bind from
+                // escalating a dev or reviewer into an architect. Checked before the worker fallback.
+                return Principal.architect(memberSlotNames.apply(slot), c.terminal(), c.pid());
+            }
+            return Principal.worker(c.terminal(), c.pid()); // unforgeable; never token-gated
+        }
+
+        if (tokenMode) {
+            return presentedTokenMatches(authorizationHeader)
+                    ? Principal.primary(c.pid())
+                    : Principal.anonymous();
+        }
+
+        // loopback-trust: same-host callers that are not workers are the primary. A non-loopback
+        // caller is anonymous even here — and startup refuses that combination anyway
+        // (BridgedConfig.validateAuthExposure), so this is defence in depth, not the control.
+        return isLoopback(remoteAddr) ? Principal.primary(c.pid()) : Principal.anonymous();
+    }
+
+    private boolean presentedTokenMatches(String authorizationHeader) {
+        String presented = bearerValue(authorizationHeader);
+        if (presented == null) {
+            return false;
+        }
+        // Constant-time: MessageDigest.isEqual does not short-circuit on the first differing byte,
+        // so a token cannot be recovered a byte at a time by timing the response.
+        return MessageDigest.isEqual(presented.getBytes(StandardCharsets.UTF_8), expectedToken);
+    }
+
+    /** Extract the credential from {@code Authorization: Bearer <token>}, or {@code null}. */
+    private static String bearerValue(String header) {
+        if (header == null) {
+            return null;
+        }
+        String h = header.trim();
+        if (h.length() < 7 || !h.regionMatches(true, 0, "Bearer ", 0, 7)) {
+            return null;
+        }
+        String token = h.substring(7).trim();
+        return token.isEmpty() ? null : token;
+    }
+
+    private static boolean isLoopback(String remoteAddr) {
+        if (remoteAddr == null) {
+            return false;
+        }
+        return remoteAddr.equals("127.0.0.1") || remoteAddr.equals("::1")
+                || remoteAddr.equals("0:0:0:0:0:0:0:1") || remoteAddr.startsWith("127.");
+    }
+}

bridged/src/main/java/dev/ltms/bridged/auth/MemberLifecycle.java

@@ -0,0 +1,21 @@
+package dev.ltms.bridged.auth;
+
+import dev.ltms.bridged.peer.MemberRole;
+
+/** Optional session lifecycle hook for live member-slot bindings. */
+public interface MemberLifecycle {
+
+    MemberLifecycle NONE = new MemberLifecycle() {
+        @Override
+        public void acquired(MemberRole role, String profile, String terminal) {
+        }
+
+        @Override
+        public void released(String terminal) {
+        }
+    };
+
+    void acquired(MemberRole role, String profile, String terminal);
+
+    void released(String terminal);
+}

bridged/src/main/java/dev/ltms/bridged/auth/MemberRegistry.java

@@ -0,0 +1,232 @@
+package dev.ltms.bridged.auth;
+
+import dev.ltms.bridged.config.BridgedConfig;
+import dev.ltms.bridged.peer.MemberRole;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Objects;
+
+/**
+ * The architect-slot registry (CB-548): every gateway-local architect name and the strong-model
+ * profile it points at, plus the <em>live</em> bindings from a live architect's herdr terminal to
+ * its slot.
+ *
+ * <p>Two halves, split by who owns each:
+ * <ul>
+ *   <li><b>slots</b> — configured once, keyed by the gateway-local unique name; each carries the
+ *       {@code profile} reference the spawn lifecycle reads when it stands the slot up. A read-only
+ *       snapshot taken at construction.</li>
+ *   <li><b>terminal bindings</b> — owned by this registry and initially <em>empty</em>. Config
+ *       declares no architect terminal, so at startup every slot is idle and nothing resolves to an
+ *       architect; a session only becomes one when the spawn lifecycle {@linkplain #bind(String,
+ *       String) binds} its terminal to a slot. {@link CallerResolver} reads this through
+ *       {@link #snapshot()} to turn a pane into an {@link Role#ARCHITECT}.</li>
+ * </ul>
+ *
+ * <p>Spawning/lifecycle is deliberately a separate unit: this class only owns the bindings and
+ * exposes the map the resolver resolves against plus the profile lookup lifecycle will call.
+ * Nothing here creates or manages an architect session.
+ */
+public final class MemberRegistry implements MemberLifecycle {
+
+    private static final Logger log = LoggerFactory.getLogger(MemberRegistry.class);
+
+    /**
+     * One flattened {@code fleet:} entry.
+     *
+     * <p>Flattened because a slot name is unique only <em>within</em> its pool — {@code sonnet} may
+     * legitimately be both a developer and a reviewer — while a terminal binds to exactly one thing.
+     * The qualified {@link #key()} is what that binding uses.
+     *
+     * @param name    the slot's key inside its pool
+     * @param role    the pool it came from
+     * @param profile the backend it runs on
+     */
+    public record Entry(String name, MemberRole role, String profile) {
+        /** {@code "architect:opus"} — unique across pools, unlike {@link #name()}. */
+        public String key() {
+            return role.wireName() + ":" + name;
+        }
+    }
+
+    private final Map<String, Entry> slots;
+    /** Live {@code terminal_id → qualified slot key}; guarded by {@code this}. */
+    private final Map<String, String> terminalToSlot = new HashMap<>();
+
+    /** Flatten every role pool in {@code fleet} into one registry. Leaders are not members. */
+    public MemberRegistry(BridgedConfig.Fleet fleet) {
+        Map<String, Entry> flat = new LinkedHashMap<>();
+        if (fleet != null) {
+            for (MemberRole role : MemberRole.values()) {
+                fleet.pool(role).forEach((name, slot) -> {
+                    if (slot != null) {
+                        Entry e = new Entry(name, role, slot.profile());
+                        flat.put(e.key(), e);
+                    }
+                });
+            }
+        }
+        this.slots = Collections.unmodifiableMap(flat);
+    }
+
+    /** The configured slots, keyed by qualified {@link Entry#key()}. Unmodifiable snapshot. */
+    public Map<String, Entry> slots() {
+        return slots;
+    }
+
+    /** The slots belonging to {@code role}, in definition order. */
+    public Map<String, Entry> slotsFor(MemberRole role) {
+        Map<String, Entry> out = new LinkedHashMap<>();
+        slots.forEach((key, e) -> {
+            if (e.role() == role) {
+                out.put(key, e);
+            }
+        });
+        return Collections.unmodifiableMap(out);
+    }
+
+    /**
+     * An immutable copy of the live {@code terminal_id → slot name} bindings.
+     *
+     * <p>Passed to {@link CallerResolver} as the source of architect identity, and what
+     * {@code bridge_whoami}/the roster will read to say which slot a pane hosts. Empty until the
+     * spawn lifecycle binds a slot.
+     */
+    public Map<String, String> snapshot() {
+        synchronized (terminalToSlot) {
+            return Map.copyOf(terminalToSlot);
+        }
+    }
+
+    /** The slot a live terminal is bound to, or {@code null} if it is not an architect slot. */
+    public String slotForTerminal(String terminal) {
+        if (terminal == null) {
+            return null;
+        }
+        synchronized (terminalToSlot) {
+            return terminalToSlot.get(terminal);
+        }
+    }
+
+    /**
+     * The strong-model profile a slot runs under — what the spawn lifecycle reads.
+     *
+     * @return the slot's configured {@code profile}, or {@code null} if the slot is unknown or
+     *         declares none
+     */
+    public String profileForSlot(String slotName) {
+        Entry e = slots.get(slotName);
+        return (e == null || e.profile() == null) ? null : e.profile();
+    }
+
+    /** The role a qualified slot key belongs to, or {@code null} when the key is unknown. */
+    public MemberRole roleForSlot(String slotName) {
+        Entry e = slots.get(slotName);
+        return e == null ? null : e.role();
+    }
+
+    /** The unqualified configured name for a slot, or {@code null} if it is unknown. */
+    public String nameForSlot(String slotName) {
+        Entry e = slots.get(slotName);
+        return e == null ? null : e.name();
+    }
+
+    /** True when {@code slotName} is a configured architect slot. */
+    public boolean isSlot(String slotName) {
+        return slots.containsKey(slotName);
+    }
+
+    /**
+     * Bind {@code terminal} to {@code slot} (CB-548).
+     *
+     * <p>The spawn lifecycle calls this when it stands a slot up. The bind is atomic and preserves
+     * the two cardinality invariants: a terminal may occupy at most one slot, and a slot may host at
+     * most one terminal. Binding the same terminal to the same slot again is a harmless no-op.
+     *
+     * @param slot     a configured slot name, or the bind is refused
+     * @param terminal the pane that will act as this architect
+     * @return {@code true} if the binding is now {@code terminal → slot}; {@code false} if it was
+     *         refused — an unknown slot, a terminal already bound to a different slot, or a slot
+     *         already hosting a different terminal
+     */
+    public boolean bind(String slot, String terminal) {
+        if (slot == null || terminal == null || terminal.isBlank()) {
+            return false;
+        }
+        synchronized (terminalToSlot) {
+            if (!isSlot(slot)) {
+                return false; // unknown slot — nothing to bind to
+            }
+            String existingSlot = terminalToSlot.get(terminal);
+            if (existingSlot != null) {
+                return slot.equals(existingSlot); // already this slot (idempotent) or a different one
+            }
+            if (terminalToSlot.containsValue(slot)) {
+                return false; // slot already hosts a terminal — no second one
+            }
+            terminalToSlot.put(terminal, slot);
+            return true;
+        }
+    }
+
+    /**
+     * Compare-safe unbind of {@code expectedTerminal} from {@code slot} (CB-548).
+     *
+     * <p>The spawn lifecycle calls this when it tears a slot down. Only the exact binding
+     * {@code expectedTerminal → slot} is removed; if that terminal was since rebound to a different
+     * slot (or the slot to a different terminal), the call is a no-op returning {@code false} — a
+     * stale unbind must never remove a replacement.
+     *
+     * @param slot             the slot the caller believes the terminal is bound to
+     * @param expectedTerminal the terminal it expects to be bound there
+     * @return {@code true} if {@code expectedTerminal → slot} was removed; {@code false} if nothing
+     *         was (no such binding, or the binding had already moved)
+     */
+    public boolean unbind(String slot, String expectedTerminal) {
+        if (slot == null || expectedTerminal == null) {
+            return false;
+        }
+        synchronized (terminalToSlot) {
+            String current = terminalToSlot.get(expectedTerminal);
+            if (current == null || !slot.equals(current)) {
+                return false; // absent, or a replacement/moved binding — leave it in place
+            }
+            terminalToSlot.remove(expectedTerminal);
+            return true;
+        }
+    }
+
+    /**
+     * Bind only architect sessions to a free slot with the resolved profile.
+     *
+     * <p>The role check is lifecycle policy. {@link CallerResolver} repeats it when resolving a
+     * binding, so a later lifecycle regression cannot turn a worker into an architect.
+     */
+    @Override
+    public void acquired(MemberRole role, String profile, String terminal) {
+        if (role != MemberRole.ARCHITECT || terminal == null || terminal.isBlank()) {
+            return;
+        }
+        // slotsFor preserves definition order, so duplicate-profile slots use the first free one.
+        for (Entry entry : slotsFor(MemberRole.ARCHITECT).values()) {
+            if (Objects.equals(profile, entry.profile()) && bind(entry.key(), terminal)) {
+                return;
+            }
+        }
+        log.info("member slot: no free architect slot for profile={}; session remains a worker", profile);
+    }
+
+    /** Unbind a released terminal using the compare-safe registry operation. */
+    @Override
+    public void released(String terminal) {
+        String slot = slotForTerminal(terminal);
+        if (slot != null) {
+            unbind(slot, terminal);
+        }
+    }
+}

bridged/src/main/java/dev/ltms/bridged/auth/Principal.java

@@ -0,0 +1,127 @@
+package dev.ltms.bridged.auth;
+
+/**
+ * A resolved caller: its {@link Role}, and — for a worker — the herdr {@code terminal_id} that
+ * identifies which worker it is (CB-501).
+ *
+ * @param role     what this caller is authorized to act as
+ * @param terminal the herdr {@code terminal_id} of the pane this caller occupies — a worker's, or
+ *                 (since CB-532) a named lead's; {@code null} for an unnamed primary resolved off a
+ *                 token or loopback trust, and for {@code ANONYMOUS}
+ * @param pid      the connecting process id, or {@code -1} when not resolvable (audit context)
+ * @param name     for a lead resolved from the CB-530 {@code leaders:} registry, which lead it is;
+ *                 for an architect resolved from the CB-548 {@code architects:} registry, which
+ *                 slot it occupies; {@code null} for every other caller, including an unnamed primary
+ */
+public record Principal(Role role, String terminal, long pid, String name) {
+
+    /**
+     * Three-arg form for the callers that have no name to carry (workers, anonymous, and the
+     * token/loopback primary paths). Kept so adding CB-530's {@code name} did not churn every
+     * construction site — and so a reconstructed principal without a stashed name still works.
+     */
+    public Principal(Role role, String terminal, long pid) {
+        this(role, terminal, pid, null);
+    }
+
+    /** A caller authenticated as nothing — the default when no check establishes anything else. */
+    public static Principal anonymous() {
+        return new Principal(Role.ANONYMOUS, null, -1);
+    }
+
+    /** The orchestrating session, unnamed (token or loopback-trust path). */
+    public static Principal primary(long pid) {
+        return new Principal(Role.PRIMARY, null, pid);
+    }
+
+    /**
+     * A named lead from the {@code leaders:} registry (CB-530).
+     *
+     * <p>Carries {@link Role#PRIMARY}: a lead <em>is</em> a primary as far as authorization goes,
+     * so every existing {@code isPrimary()} gate keeps working unchanged and the role table needed
+     * no new entry. The name is reporting only — it lets {@code bridge_whoami} say <em>which</em>
+     * lead is asking once more than one is configured.
+     *
+     * <p><strong>CB-532: a lead now carries the terminal it was matched by.</strong> Under CB-530 it
+     * deliberately did not, because {@code terminal} meant "which worker pane" everywhere and a
+     * non-null one would have enrolled the lead in the worker presence map. That reading was what
+     * made a lead unaddressable: {@link #ownsSession} could never be true for it, so
+     * {@code bridge_reply} was refused and one lead could send to another but never be answered.
+     * The terminal now means "which pane is this caller", the presence map keys on
+     * {@link #isSpawnedMember()} instead, and a lead is a peer that can both send and receive.
+     */
+    public static Principal leader(String name, String terminal, long pid) {
+        return new Principal(Role.PRIMARY, terminal, pid, name);
+    }
+
+    /** A worker peer, identified by its herdr pane. */
+    public static Principal worker(String terminal, long pid) {
+        return new Principal(Role.WORKER, terminal, pid);
+    }
+
+    /**
+     * An architect (CB-548), identified by the slot it occupies and the pane bound to it.
+     *
+     * <p>Carries {@link Role#ARCHITECT}. {@code slotName} is reporting only — it lets
+     * {@code bridge_whoami} say <em>which</em> architect slot is asking, and it is the key the
+     * (future) spawn lifecycle reads a profile back from. Identity is the {@code terminal}: like a
+     * worker's it comes from the connection and the live terminal→slot binding, so
+     * {@code ownsSession} works exactly as it does for a worker — an architect acts as its own
+     * pane and no other.
+     */
+    public static Principal architect(String slotName, String terminal, long pid) {
+        return new Principal(Role.ARCHITECT, terminal, pid, slotName);
+    }
+
+    public boolean isPrimary() {
+        return role == Role.PRIMARY;
+    }
+
+    public boolean isArchitect() {
+        return role == Role.ARCHITECT;
+    }
+
+    public boolean isWorker() {
+        return role == Role.WORKER;
+    }
+
+    /**
+     * Whether this caller is a spawned member with its own pane.
+     *
+     * <p>Both workers and architects are spawned members. A lead is excluded because recording it
+     * as present would count it as an available member in the roster.
+     */
+    public boolean isSpawnedMember() {
+        return role == Role.WORKER || role == Role.ARCHITECT;
+    }
+
+    public boolean isAnonymous() {
+        return role == Role.ANONYMOUS;
+    }
+
+    /**
+     * Whether this caller may act <em>as</em> {@code sessionId} — the "own session only" rule that
+     * keeps one peer from replying or asking on another's behalf.
+     *
+     * <p>The rule is about <em>identity</em>, not rank: a caller may act as the pane it demonstrably
+     * occupies, and as no other. CB-532 dropped the extra {@code isWorker()} conjunct that used to
+     * be here. It was not what enforced the rule — {@code terminal.equals(sessionId)} is, and that
+     * terminal comes from the connection, so it cannot be forged either way. All the conjunct did
+     * was make a lead permanently unable to answer anyone, since a lead's terminal was null and a
+     * lead is not a worker. A caller with no terminal at all (an off-host or token-authenticated
+     * primary) still owns nothing, which is the case the null check covers.
+     */
+    public boolean ownsSession(String sessionId) {
+        return terminal != null && terminal.equals(sessionId);
+    }
+
+    /** Short, non-sensitive description for audit lines and error details. */
+    public String describe() {
+        return switch (role) {
+            case WORKER -> "worker:" + terminal;
+            case ARCHITECT -> "architect:" + name;
+            case PRIMARY -> name == null ? "primary" : "leader:" + name;
+            case ANONYMOUS -> "anonymous";
+        };
+    }
+}

bridged/src/main/java/dev/ltms/bridged/auth/Role.java

@@ -0,0 +1,39 @@
+package dev.ltms.bridged.auth;
+
+/**
+ * What a caller is allowed to be on the bus (CB-501).
+ *
+ * <p>The ordering matters conceptually: {@link #PRIMARY} is the <em>most</em> privileged role
+ * (it spawns, stops, sends to any session, and drains any inbox), not the least. Before CB-501
+ * the daemon reached {@code PRIMARY} by <em>failing</em> every other check — any caller that did
+ * not resolve to a known worker pane was treated as the primary. That is inverted here:
+ * {@link #ANONYMOUS} is the fallback, and {@code PRIMARY} must be established.
+ */
+public enum Role {
+
+    /**
+     * The orchestrating session. Established either by being a loopback caller that is not a
+     * worker pane (under {@code loopback-trust}) or by presenting a valid bearer token (under
+     * {@code token} mode).
+     */
+    PRIMARY,
+
+    /**
+     * A worker peer, identified by its herdr pane. Unforgeable: derived from the connection's
+     * loopback peer PID via herdr's PID→pane map, never from a request argument.
+     */
+    WORKER,
+
+    /**
+     * A config-declared architect slot (CB-548): a gateway-local named session on a strong-model
+     * profile that coordinates and delegates turns but does not own the fleet. Unforgeable like a
+     * worker's — derived from the connection's pane and the live terminal→slot binding, never from
+     * a request argument. May {@code SEND} a turn, {@code REPLY}/{@code ASK} only as its own pane,
+     * and {@code READ}/{@code METRICS}; may <em>not</em> {@code SPAWN}/{@code STOP}/{@code DRAIN}
+     * (those stay the primary's, to keep lifecycle in one pair of hands).
+     */
+    ARCHITECT,
+
+    /** Authenticated as nothing. Authorized for nothing but {@code /healthz}. */
+    ANONYMOUS
+}

bridged/src/main/java/dev/ltms/bridged/config/ConfigRef.java

@@ -0,0 +1,270 @@
+package dev.ltms.bridged.config;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.concurrent.atomic.AtomicReference;
+import java.util.function.Supplier;
+
+/**
+ * The daemon's live configuration, re-readable without a restart (CB-559).
+ *
+ * <p>Consumers hold this, not a {@link BridgedConfig}, and read through {@link #get()} at the point
+ * of use. A component that captures {@code ref.get()} into a field at construction has opted out of
+ * reload — which is sometimes right (see <em>deferred</em> below), but it must then be a deliberate
+ * choice rather than an accident of where the field was initialised.
+ *
+ * <h2>Not every key can change under a running daemon</h2>
+ * Keys fall into three classes, and the difference is about what already exists when the reload
+ * happens — not about how important the key is.
+ *
+ * <ul>
+ *   <li><strong>Hot</strong> — re-read per use, so a reload takes effect on the next spawn:
+ *       {@code fleet:} (every role pool, {@code charters}, and {@code tabLabel}),
+ *       {@code placement:}, and an existing profile's {@code weight} / {@code maxLoad}. Those
+ *       three are read through a supplier on {@code CompositePeerLauncher}, which is what makes
+ *       them hot — not the fact that they are config.</li>
+ *   <li><strong>Deferred</strong> — accepted into the new snapshot, but the wiring built at startup
+ *       keeps the old value until a restart: {@code lifecycle:}, {@code leadHeartbeat:},
+ *       {@code spawnReadyTimeoutMs} / {@code spawnReadyPollMs}, {@code guard:},
+ *       {@code worktreeRoot:}, adding or removing a profile (a new backend needs its own launcher,
+ *       which is constructed once), <em>and an existing profile's launch settings</em> —
+ *       {@code model}, {@code baseUrl}, {@code argv}, {@code env}, {@code mcpUrl} and the rest.
+ *       {@code HerdrPeerLauncher} takes {@code Map.copyOf(profiles)} at construction and resolves
+ *       each spawn out of that copy, so those never reach a launch until the daemon restarts. A
+ *       reload logs these rather than pretending they applied.</li>
+ *   <li><strong>Cold</strong> — cannot change at all under a running daemon: {@code bind:},
+ *       {@code herdrSocket:}, {@code broker:} and {@code auth:}. The socket is bound, the broker
+ *       connection is open, and the auth mode decides who may reach the port that is already
+ *       listening.</li>
+ * </ul>
+ *
+ * <p><strong>A cold change refuses the whole reload.</strong> Not the hot half applied and the cold
+ * half warned about: that would leave the running daemon in a state matching no file on disk, which
+ * is the worst thing a reload can do to an operator debugging one. Refusing keeps the invariant that
+ * the live config is always some version of the file, and the message names the keys that must
+ * change through a restart.
+ *
+ * <p>A reload that fails to parse or fails validation is also refused, and the previous config keeps
+ * running. A config file being edited is normally read once mid-save; degrading a working daemon
+ * because it caught a half-written file would be a bad trade.
+ */
+public final class ConfigRef implements Supplier<BridgedConfig> {
+
+    private static final Logger log = LoggerFactory.getLogger(ConfigRef.class);
+
+    /** Keys that cannot change under a running daemon — see the class doc. */
+    private static final Set<String> COLD_KEYS =
+            Set.of("bind", "herdrSocket", "broker", "auth");
+
+    private final Path path;
+    private final AtomicReference<BridgedConfig> current;
+
+    public ConfigRef(Path path, BridgedConfig initial) {
+        this.path = path;
+        this.current = new AtomicReference<>(Objects.requireNonNull(initial, "initial config"));
+    }
+
+    /** A fixed reference that never reloads — for tests and for wiring built from a config in code. */
+    public static ConfigRef fixed(BridgedConfig cfg) {
+        return new ConfigRef(null, cfg);
+    }
+
+    /** The live configuration. Read this per use; do not cache it in a field. */
+    @Override
+    public BridgedConfig get() {
+        return current.get();
+    }
+
+    /** The file this ref reloads from, or {@code null} for a {@link #fixed} ref. */
+    public Path path() {
+        return path;
+    }
+
+    /**
+     * What a reload attempt did.
+     *
+     * @param applied  true when the new config is now live
+     * @param coldKeys cold keys whose value changed, which is why an unapplied reload was refused
+     * @param deferred keys that changed and were accepted, but whose effect waits for a restart
+     * @param error    the parse or validation failure that refused the reload, else {@code null}
+     */
+    public record Outcome(boolean applied, List<String> coldKeys, List<String> deferred,
+                          String error) {
+
+        public Outcome {
+            coldKeys = List.copyOf(coldKeys);
+            deferred = List.copyOf(deferred);
+        }
+
+        static Outcome refusedCold(List<String> keys) {
+            return new Outcome(false, keys, List.of(), null);
+        }
+
+        static Outcome failed(String error) {
+            return new Outcome(false, List.of(), List.of(), error);
+        }
+
+        /** A one-line summary for the operator — the reason, not just the verdict. */
+        public String summary() {
+            if (error != null) {
+                return "config reload refused — " + error;
+            }
+            if (!applied) {
+                return "config reload refused — these keys cannot change under a running daemon: "
+                        + String.join(", ", coldKeys) + ". Restart bridged to apply them.";
+            }
+            if (!deferred.isEmpty()) {
+                return "config reloaded; these changes need a restart to take effect: "
+                        + String.join(", ", deferred);
+            }
+            return "config reloaded";
+        }
+    }
+
+    /**
+     * Re-read the file, validate it, and swap it in when nothing cold changed.
+     *
+     * <p>Never throws: a reload is a best-effort operation on a daemon that is already serving, and
+     * a bad edit must not take it down. Every failure path leaves the previous config live and is
+     * reported through the returned {@link Outcome}.
+     */
+    public Outcome reload() {
+        if (path == null) {
+            return Outcome.failed("this config was built in code and has no file to reload from");
+        }
+        BridgedConfig old = current.get();
+        BridgedConfig fresh;
+        try {
+            fresh = BridgedConfig.load(path);
+            // The same gate startup runs. A config that would have refused to boot must not be able
+            // to slip in through a reload — that is how a daemon ends up in a state it could never
+            // have started in, which is the hardest kind to debug.
+            fresh.validateAuthExposure();
+            fresh.validateLeadTabPrefixes();
+            fresh.validateSubscriptionProfiles();
+            fresh.validateCharters();
+            fresh.validateMembers();
+        } catch (RuntimeException e) {
+            String msg = e.getMessage() == null ? e.toString() : e.getMessage();
+            log.warn("config reload from {} refused, keeping the running config: {}", path, msg);
+            return Outcome.failed(msg);
+        }
+
+        List<String> cold = changedColdKeys(old, fresh);
+        if (!cold.isEmpty()) {
+            Outcome out = Outcome.refusedCold(cold);
+            log.warn(out.summary());
+            return out;
+        }
+
+        List<String> deferred = changedDeferredKeys(old, fresh);
+        current.set(fresh);
+        Outcome out = new Outcome(true, List.of(), deferred, null);
+        log.info(out.summary());
+        return out;
+    }
+
+    /** Cold keys whose value differs between the running config and the candidate. */
+    private static List<String> changedColdKeys(BridgedConfig old, BridgedConfig fresh) {
+        List<String> changed = new ArrayList<>();
+        if (!Objects.equals(old.bind(), fresh.bind())) {
+            changed.add("bind");
+        }
+        if (!Objects.equals(old.herdrSocket(), fresh.herdrSocket())) {
+            changed.add("herdrSocket");
+        }
+        if (!Objects.equals(old.broker(), fresh.broker())) {
+            changed.add("broker");
+        }
+        if (!Objects.equals(old.auth(), fresh.auth())) {
+            changed.add("auth");
+        }
+        // Kept in step with COLD_KEYS so the doc and the code cannot drift apart silently.
+        assert COLD_KEYS.containsAll(changed) : "a cold key was reported that COLD_KEYS omits";
+        return changed;
+    }
+
+    /** Changed keys that were accepted but whose effect waits for a restart. */
+    private static List<String> changedDeferredKeys(BridgedConfig old, BridgedConfig fresh) {
+        List<String> changed = new ArrayList<>();
+        if (!Objects.equals(old.lifecycle(), fresh.lifecycle())) {
+            changed.add("lifecycle");
+        }
+        if (!Objects.equals(old.leadHeartbeat(), fresh.leadHeartbeat())) {
+            changed.add("leadHeartbeat");
+        }
+        if (!Objects.equals(old.guard(), fresh.guard())) {
+            changed.add("guard");
+        }
+        if (!Objects.equals(old.worktreeRoot(), fresh.worktreeRoot())) {
+            changed.add("worktreeRoot");
+        }
+        if (!Objects.equals(old.spawnReadyTimeoutMs(), fresh.spawnReadyTimeoutMs())
+                || !Objects.equals(old.spawnReadyPollMs(), fresh.spawnReadyPollMs())) {
+            changed.add("spawnReady*");
+        }
+        Map<String, BridgedConfig.Profile> before =
+                old.profiles() == null ? Map.of() : old.profiles();
+        Map<String, BridgedConfig.Profile> after =
+                fresh.profiles() == null ? Map.of() : fresh.profiles();
+        // Adding or removing a profile is deferred: a new backend needs its own launcher, and
+        // launchers are built once at startup.
+        if (!before.keySet().equals(after.keySet())) {
+            Set<String> diff = new LinkedHashSet<>(before.keySet());
+            diff.addAll(after.keySet());
+            diff.removeIf(p -> before.containsKey(p) && after.containsKey(p));
+            changed.add("profiles (added/removed: " + String.join(", ", diff) + ")");
+        }
+        // An EXISTING profile's launch settings are deferred too, and this is easy to get wrong:
+        // `HerdrPeerLauncher` takes `Map.copyOf(profiles)` at construction and `spawn` resolves the
+        // profile out of that snapshot, so a reloaded model/baseUrl/argv/env never reaches a launch.
+        // Only weight and maxLoad are genuinely hot, because placement reads them through the
+        // supplier on the composite rather than from the adapter's copy. Without this check a
+        // changed model would report "config reloaded" and silently do nothing — the worst outcome
+        // a reload can produce, because the operator has no reason to doubt it.
+        List<String> relaunch = new ArrayList<>();
+        before.forEach((name, was) -> {
+            BridgedConfig.Profile now = after.get(name);
+            if (now != null && !sameLaunchSettings(was, now)) {
+                relaunch.add(name);
+            }
+        });
+        if (!relaunch.isEmpty()) {
+            changed.add("profiles." + String.join("/", relaunch) + " launch settings "
+                    + "(model, baseUrl, argv, env, …) — the launcher holds a startup snapshot");
+        }
+        return changed;
+    }
+
+    /**
+     * Whether two versions of a profile would launch a peer identically. Compares every component
+     * the launcher reads at spawn; {@code weight} and {@code maxLoad} are excluded because those are
+     * read live by the placement policy and really do take effect on the next spawn.
+     */
+    private static boolean sameLaunchSettings(BridgedConfig.Profile a, BridgedConfig.Profile b) {
+        return Objects.equals(a.baseUrl(), b.baseUrl())
+                && Objects.equals(a.model(), b.model())
+                && Objects.equals(a.configDir(), b.configDir())
+                && Objects.equals(a.tokenEnv(), b.tokenEnv())
+                && Objects.equals(a.argv(), b.argv())
+                && Objects.equals(a.placement(), b.placement())
+                && Objects.equals(a.workspace(), b.workspace())
+                && Objects.equals(a.tabLabel(), b.tabLabel())
+                && Objects.equals(a.mcpUrl(), b.mcpUrl())
+                && Objects.equals(a.cwd(), b.cwd())
+                && Objects.equals(a.parityOverlay(), b.parityOverlay())
+                && Objects.equals(a.gitTokenEnv(), b.gitTokenEnv())
+                && Objects.equals(a.gitHostEnv(), b.gitHostEnv())
+                && Objects.equals(a.kind(), b.kind())
+                && Objects.equals(a.env(), b.env())
+                && Objects.equals(a.subscription(), b.subscription());
+    }
+}

bridged/src/main/java/dev/ltms/bridged/config/ConfigWatcher.java

@@ -0,0 +1,96 @@
+package dev.ltms.bridged.config;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Polls {@code bridged.yaml}'s modified time and asks {@link ConfigRef} to reload when it moves
+ * (CB-559). Opt-in through {@code configReload.enabled}.
+ *
+ * <p><strong>Why polling and not a filesystem watch.</strong> {@code WatchService} on macOS has no
+ * native backend — it falls back to polling internally anyway, at an interval this code does not
+ * control — and editors save config files in ways that produce a different event mix per editor
+ * (write-in-place, write-and-rename, write-temp-and-swap). A modified-time check treats all of them
+ * the same and is a single {@code stat} per tick, which at a ten-second cadence costs nothing worth
+ * measuring.
+ *
+ * <p><strong>A missing or unreadable file is not a reason to act.</strong> Many editors briefly
+ * unlink the file during a save. Reloading on "it vanished" would mean reloading from a file that no
+ * longer exists; reporting an error every tick would bury the log. So an unreadable file is skipped
+ * silently and the next tick tries again — the running config stays live, which is the correct
+ * outcome either way.
+ */
+public final class ConfigWatcher {
+
+    private static final Logger log = LoggerFactory.getLogger(ConfigWatcher.class);
+
+    private final ConfigRef ref;
+    private final long intervalSeconds;
+    private final ScheduledExecutorService scheduler;
+
+    private volatile long lastSeenMillis;
+
+    public ConfigWatcher(ConfigRef ref, long intervalSeconds) {
+        this.ref = ref;
+        this.intervalSeconds = intervalSeconds;
+        this.lastSeenMillis = modifiedMillis(ref.path());
+        this.scheduler = Executors.newSingleThreadScheduledExecutor(r -> {
+            Thread t = new Thread(r, "config-watcher");
+            // A daemon thread: an operator's config watch must never be the reason the JVM refuses
+            // to exit after everything else has shut down.
+            t.setDaemon(true);
+            return t;
+        });
+    }
+
+    /** Begin watching. A ref with no file (a fixed one) is a no-op rather than an error. */
+    public void start() {
+        if (ref.path() == null) {
+            log.debug("config watch not started — this config has no file behind it");
+            return;
+        }
+        scheduler.scheduleWithFixedDelay(this::tick, intervalSeconds, intervalSeconds,
+                TimeUnit.SECONDS);
+        log.info("config watch: {} re-read when it changes (every {}s)", ref.path(), intervalSeconds);
+    }
+
+    /** One poll. Never throws — an exception here would silently cancel the schedule. */
+    void tick() {
+        try {
+            long now = modifiedMillis(ref.path());
+            if (now == 0 || now == lastSeenMillis) {
+                return;
+            }
+            // Stamp BEFORE reloading. A file whose reload is refused (a bad edit, or a cold key)
+            // must not be retried every tick — that would log the same refusal forever. The next
+            // save moves the timestamp again and earns a fresh attempt.
+            lastSeenMillis = now;
+            ref.reload();
+        } catch (RuntimeException e) {
+            log.warn("config watch tick failed, still watching: {}", e.getMessage());
+        }
+    }
+
+    private static long modifiedMillis(Path path) {
+        if (path == null) {
+            return 0;
+        }
+        try {
+            return Files.getLastModifiedTime(path).toMillis();
+        } catch (IOException e) {
+            return 0; // mid-save, or gone: say nothing and try again next tick
+        }
+    }
+
+    /** Stop polling. Called from the daemon's ordered shutdown hook, alongside the other loops. */
+    public void stop() {
+        scheduler.shutdownNow();
+    }
+}

bridged/src/main/java/dev/ltms/bridged/herdr/Agent.java

@@ -15,6 +15,10 @@ import com.fasterxml.jackson.databind.JsonNode;
  * @param agentType  detected agent kind, e.g. {@code "claude"}, or {@code null} before herdr
  *                   has detected it (the start-time shape)
  * @param status     current lifecycle state
+ * @param name       the unique label the agent was started with — for a bridge worker this is
+ *                   {@code claude-<profile>-<nonce>-<seq>} (CB-117 keys orphan reaping on the
+ *                   nonce); {@code null} for agents the bridge did not start, e.g. a user's own
+ *                   Claude session
  */
 public record Agent(
         String terminalId,
@@ -23,7 +27,8 @@ public record Agent(
         String tabId,
         String sessionId,
         String agentType,
-        AgentStatus status) {
+        AgentStatus status,
+        String name) {
 
     /** Project a herdr {@code agent} node. Tolerates the start-time shape (no session yet). */
     public static Agent from(JsonNode a) {
@@ -42,6 +47,7 @@ public record Agent(
                 a.path("tab_id").asText(null),
                 sessionId,
                 type,
-                AgentStatus.fromWire(a.path("agent_status").asText(null)));
+                AgentStatus.fromWire(a.path("agent_status").asText(null)),
+                a.path("name").asText(null));
     }
 }

bridged/src/main/java/dev/ltms/bridged/herdr/AgentControl.java

@@ -6,12 +6,18 @@ import java.util.ArrayList;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
 
 /**
  * Domain layer over herdr's native {@code agent.*} namespace — the worker south side.
- * Chosen in the CB-102 spike over the pane + {@code send_text} fallback because
- * {@code agent.start} takes a first-class {@code env} map (clean, guard-checked
- * subscription injection) and herdr tracks each worker's Claude session UUID itself.
+ * Chosen in the CB-102 spike over the pane + {@code send_text} fallback because herdr
+ * tracks each worker's Claude session UUID itself.
+ *
+ * <p>Ported to herdr protocol 19 (herdr 0.8.0, CB-521): {@code agent.start} now starts a
+ * <em>supported</em> agent ({@code kind}) into an <em>existing</em> pane, so the worker's
+ * {@code env}/{@code cwd} move to pane creation ({@code tab.create}/{@code pane.split} — see
+ * {@link WorkspaceControl}), and {@code agent.send} is replaced by {@code agent.prompt}
+ * (which submits in one call) plus {@code agent.send_keys} for the raw Enter nudge.
  *
  * <p>Every method is one herdr call through the injected {@link HerdrClient}, so this
  * layer is unit-testable with a fake and contract-tested against a live daemon.
@@ -20,42 +26,100 @@ public final class AgentControl {
 
     private final HerdrClient herdr;
 
+    /**
+     * Protocol 19 dropped {@code terminal_id} as an {@code agent.*} target — herdr now resolves
+     * targets by pane id or agent name only, while the bridge keys every session on the terminal.
+     * This caches the terminal→pane mapping (stable for a worker's lifetime) so callers keep
+     * addressing agents by terminal; entries are invalidated on {@code agent_not_found}.
+     */
+    private final Map<String, String> paneByTerminal = new ConcurrentHashMap<>();
+
     public AgentControl(HerdrClient herdr) {
         this.herdr = herdr;
     }
 
-    /**
-     * Spawn an agent. {@code env} is applied to the process environment verbatim — this
-     * is where a worker's {@code ANTHROPIC_BASE_URL} lives, and the ONLY place it should.
-     *
-     * @param name label/kind for herdr status detection (e.g. {@code "claude"})
-     * @param argv launch command, e.g. {@code ["claude"]}
-     * @param env  process environment additions ({@code ANTHROPIC_BASE_URL}, token, …)
-     */
-    public Agent start(String name, List<String> argv, Map<String, String> env) {
-        return start(name, argv, env, null);
+    /** One agent-targeted call, translating a terminal id to its pane id (retrying once fresh). */
+    private JsonNode agentCall(String method, String target, Map<String, Object> extra) {
+        String resolved = resolveTarget(target);
+        try {
+            return herdr.call(method, withTarget(resolved, extra));
+        } catch (HerdrException e) {
+            if (!"agent_not_found".equals(e.code()) || resolved.equals(target)) throw e;
+            paneByTerminal.remove(target); // the cached pane went away — re-resolve once
+            String fresh = resolveTarget(target);
+            if (fresh.equals(resolved)) throw e;
+            return herdr.call(method, withTarget(fresh, extra));
+        }
+    }
+
+    private static Map<String, Object> withTarget(String target, Map<String, Object> extra) {
+        Map<String, Object> m = new LinkedHashMap<>();
+        m.put("target", target);
+        m.putAll(extra);
+        return m;
+    }
+
+    /** The pane id behind a terminal-id target, or the target verbatim for pane ids / names. */
+    private String resolveTarget(String target) {
+        if (target == null || !target.startsWith("term_")) {
+            return target;
+        }
+        String cached = paneByTerminal.get(target);
+        if (cached != null) {
+            return cached;
+        }
+        for (JsonNode a : herdr.call("agent.list").path("agents")) {
+            if (target.equals(a.path("terminal_id").asText(null))) {
+                String pane = a.path("pane_id").asText(null);
+                if (pane != null) {
+                    paneByTerminal.put(target, pane);
+                    return pane;
+                }
+            }
+        }
+        return target; // unknown terminal — let herdr report it against the original target
     }
 
     /**
-     * Spawn an agent into a specific tab. With a non-null {@code tabId} the worker lands
-     * in that tab (the placement policy's dedicated worker tab); with {@code null} herdr
-     * splits the currently-focused tab (legacy pane placement).
+     * Start an agent into {@code paneId}, which must be sitting at its interactive shell prompt —
+     * the seed pane of a freshly-created worker tab, or a fresh split. The pane's shell already
+     * carries the worker's env ({@code ANTHROPIC_BASE_URL}, token, …) and cwd from pane creation;
+     * herdr resolves the executable from {@code kind} and waits (its default timeout) until the
+     * agent is detected and ready for input.
+     *
+     * @param name unique label for this agent ({@code <kind>-<profile>-<nonce>-<seq>})
+     * @param kind supported agent kind and canonical executable, e.g. {@code "claude"},
+     *             {@code "opencode"}
+     * @param args extra arguments after the executable, e.g. {@code --mcp-config …}
+     * @param paneId the pane to start the agent in
      */
-    public Agent start(String name, List<String> argv, Map<String, String> env, String tabId) {
+    public Agent start(String name, String kind, List<String> args, String paneId) {
         Map<String, Object> params = new LinkedHashMap<>();
         params.put("name", name);
-        params.put("argv", argv);
-        params.put("env", env);
-        if (tabId != null) {
-            params.put("tab_id", tabId);
-        }
+        params.put("kind", kind);
+        params.put("pane_id", paneId);
+        params.put("args", args);
         JsonNode result = herdr.call("agent.start", params);
         return Agent.from(result.get("agent"));
     }
 
-    /** Deliver {@code text} to an agent (its next prompt input). */
+    /**
+     * Deliver {@code text} to an agent as its next prompt <em>and submit it</em> — herdr's
+     * {@code agent.prompt} pastes the text (embedded newlines preserved verbatim) and submits it
+     * in the same call, replacing the pre-protocol-19 two-event {@code agent.send} dance.
+     */
     public void send(String target, String text) {
-        herdr.call("agent.send", Map.of("target", target, "text", text));
+        agentCall("agent.prompt", target, Map.of("text", text));
+    }
+
+    /**
+     * Re-send the submit keystroke (Enter) to {@code target}. The submit that accompanies a
+     * delivery can race the paste — especially right as the worker's TUI becomes interactive —
+     * leaving the text unsubmitted; the injector nudges it with this until the worker actually
+     * picks up (CB-113).
+     */
+    public void submit(String target) {
+        agentCall("agent.send_keys", target, Map.of("keys", List.of("enter")));
     }
 
     /**
@@ -64,13 +128,13 @@ public final class AgentControl {
      * @param source one of {@code visible|recent|recent_unwrapped|detection}
      */
     public String read(String target, String source) {
-        JsonNode result = herdr.call("agent.read", Map.of("target", target, "source", source));
+        JsonNode result = agentCall("agent.read", target, Map.of("source", source));
         return result.path("read").path("text").asText("");
     }
 
     /** Current agent record (status, session UUID, pane). */
     public Agent get(String target) {
-        return Agent.from(herdr.call("agent.get", Map.of("target", target)).get("agent"));
+        return Agent.from(agentCall("agent.get", target, Map.of()).get("agent"));
     }
 
     /** Just the lifecycle status — what the status-gated injector checks before send. */

bridged/src/main/java/dev/ltms/bridged/herdr/AgentStatus.java

@@ -2,28 +2,38 @@ package dev.ltms.bridged.herdr;
 
 /**
  * A herdr agent's lifecycle state, as reported by {@code agent_status}. Drives the
- * status-gated injector: a worker is safe to inject into only when {@link #IDLE} or
- * {@link #BLOCKED}, never mid-turn ({@link #WORKING}).
+ * status-gated injector: a worker is safe to inject into only when {@link #IDLE},
+ * {@link #BLOCKED}, or {@link #DONE}, never mid-turn ({@link #WORKING}).
  */
 public enum AgentStatus {
     IDLE,
     WORKING,
     BLOCKED,
+    /**
+     * The worker has finished its turn and is settled at an idle prompt. herdr emits this
+     * (observed live alongside {@code idle}) as a turn-complete marker; earlier code mapped the
+     * unrecognized string to {@link #UNKNOWN}, which both wedged delivery (not {@link #injectable})
+     * and mis-fired the CB-109 stall-failure on a worker that had actually answered. It is a
+     * turn-boundary equivalent to {@link #IDLE}: injectable, and a {@code working → done} edge is a
+     * real completion.
+     */
+    DONE,
     UNKNOWN;
 
-    /** Map herdr's wire string ({@code idle|working|blocked|unknown}) to the enum. */
+    /** Map herdr's wire string ({@code idle|working|blocked|done|unknown}) to the enum. */
     public static AgentStatus fromWire(String s) {
         if (s == null) return UNKNOWN;
         return switch (s.toLowerCase()) {
             case "idle" -> IDLE;
             case "working" -> WORKING;
             case "blocked" -> BLOCKED;
+            case "done" -> DONE;
             default -> UNKNOWN;
         };
     }
 
     /** Whether {@code bridged} may inject a message now without stepping on a live turn. */
     public boolean injectable() {
-        return this == IDLE || this == BLOCKED;
+        return this == IDLE || this == BLOCKED || this == DONE;
     }
 }

bridged/src/main/java/dev/ltms/bridged/herdr/LeadTabScanner.java

@@ -0,0 +1,175 @@
+package dev.ltms.bridged.herdr;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.LongSupplier;
+import java.util.function.Supplier;
+
+/**
+ * Discovers which panes host a lead by scanning herdr for tabs the operator labelled by convention
+ * (CB-531), and hands {@link dev.ltms.bridged.auth.CallerResolver} the resulting
+ * {@code terminal_id → lead name} map.
+ *
+ * <p><strong>Why scan at all.</strong> A lead is never spawned — a human opens a tab and starts an
+ * agent in it — so the daemon cannot learn a lead's {@code terminal_id} at creation time the way it
+ * does a worker's. CB-530 solved that by having the operator paste each id into {@code leaders:},
+ * which works but costs a config edit and a daemon restart per lead, and the id is only obtainable
+ * by first starting the session and asking it. Scanning closes that loop: label the tab, and the
+ * pane is recognised on the next resolve.
+ *
+ * <p><strong>Direction of trust.</strong> The label names the lead; it never <em>grants</em>
+ * anything a pane could take for itself. Three properties keep that honest:
+ * <ol>
+ *   <li>Worker spaces are excluded wholesale ({@code excludedWorkspaceLabels}), so a worker cannot
+ *       become a lead by being placed — as a split, say — inside a matching tab.</li>
+ *   <li>A worker cannot rename a tab: {@code tab.rename} is reachable only through
+ *       {@link WorkspaceControl}, which no {@code bridge_*} tool exposes. The label is writable by
+ *       the human at the terminal and by nobody the bridge is defending against.</li>
+ *   <li>The label is a <em>name</em>, not a capability. What a pane may do is decided by
+ *       {@code Authz} against the role {@code CallerResolver} returns; a tab that calls itself a
+ *       lead still cannot act as one unless the daemon's own registry agrees.</li>
+ * </ol>
+ *
+ * <p><strong>CB-558 — bridged now writes lead labels too.</strong> This class used to be able to say
+ * that bridged never renames a lead tab, so the label was always the human's own writing and there
+ * was no round-trip from the daemon's rename back into its next decision.
+ * {@code dev.ltms.bridged.lead.LeadLauncher} ends that: an auto-launched lead is labelled by the
+ * daemon and found again by this scan. The trust direction above is unaffected — bridged writing a
+ * name for a lead it just started is not a pane promoting itself — but <em>staleness</em> becomes
+ * real: a label left behind by a session that has since died would read as a live lead forever.
+ * This scanner does not solve that (its job is naming, and a stale name costs nothing here); the
+ * launcher does, by requiring a running agent in the tab before it counts the lead as live. If you
+ * ever make a decision that <em>removes</em> something based on this map, add the same check.
+ * The remaining hazard is an <em>operator</em> one — a worker {@code tabLabel} template that
+ * happens to start with the same prefix would promote the whole fleet — and that is refused at
+ * startup by {@code BridgedConfig.validateLeadScan} rather than documented here.
+ *
+ * <p><strong>Caching.</strong> {@link #get()} is on the request path (every resolve), so the scan
+ * is TTL-cached and a stale-but-valid map is preferred to a herdr round-trip. A failed scan keeps
+ * the previous answer instead of emptying it — a herdr hiccup must not silently demote a live lead
+ * mid-session.
+ */
+public final class LeadTabScanner implements Supplier<Map<String, String>> {
+
+    private static final Logger log = LoggerFactory.getLogger(LeadTabScanner.class);
+
+    private final HerdrClient herdr;
+    private final String tabPrefix;
+    private final Set<String> excludedWorkspaceLabels;
+    private final Map<String, String> configuredLeads;
+    private final long ttlNanos;
+    private final LongSupplier clock;
+
+    private Map<String, String> cached;
+    private long scannedAtNanos;
+    private boolean everScanned;
+
+    /**
+     * @param herdr                   the herdr client to query ({@code workspace.list},
+     *                                {@code tab.list}, {@code pane.list} — all read-only)
+     * @param tabPrefix               a tab whose label starts with this (case-insensitively) hosts a
+     *                                lead; the rest of the label, trimmed, is the lead's name
+     * @param excludedWorkspaceLabels workspaces never scanned — the configured worker spaces
+     * @param configuredLeads         the static {@code leaders:}/{@code primary:} registry, merged
+     *                                over every scan result. Explicit config outranks the
+     *                                convention, and survives a scan that cannot run at all
+     * @param ttlNanos                how long a scan result is reused before the next one
+     * @param clock                   nanosecond time source ({@code System::nanoTime} in production)
+     */
+    public LeadTabScanner(HerdrClient herdr, String tabPrefix, Set<String> excludedWorkspaceLabels,
+                          Map<String, String> configuredLeads, long ttlNanos, LongSupplier clock) {
+        this.herdr = herdr;
+        this.tabPrefix = tabPrefix == null || tabPrefix.isBlank() ? "lead:" : tabPrefix.strip();
+        this.excludedWorkspaceLabels = excludedWorkspaceLabels == null
+                ? Set.of() : Set.copyOf(excludedWorkspaceLabels);
+        this.configuredLeads = configuredLeads == null ? Map.of() : Map.copyOf(configuredLeads);
+        this.ttlNanos = ttlNanos;
+        this.clock = clock;
+        this.cached = this.configuredLeads;
+    }
+
+    /**
+     * The current {@code terminal_id → lead name} map, rescanning when the cache has expired.
+     *
+     * <p>Synchronized so a burst of concurrent calls produces one scan rather than one each; a scan
+     * is a handful of RPCs over a Unix socket and is rate-limited to one per TTL.
+     */
+    @Override
+    public synchronized Map<String, String> get() {
+        long now = clock.getAsLong();
+        if (everScanned && now - scannedAtNanos < ttlNanos) {
+            return cached;
+        }
+        // Stamp before scanning, not after: a herdr that is down must cost one attempt per TTL, not
+        // one per request.
+        scannedAtNanos = now;
+        everScanned = true;
+        try {
+            Map<String, String> fresh = scan();
+            if (!fresh.equals(cached)) {
+                log.info("lead panes: {}", fresh);
+            }
+            cached = fresh;
+        } catch (HerdrException e) {
+            log.warn("lead-tab scan failed, keeping the {} lead(s) already known: {}",
+                    cached.size(), e.getMessage());
+        }
+        return cached;
+    }
+
+    /** One full pass: labelled tabs → their panes → those panes' terminals. */
+    private Map<String, String> scan() {
+        Map<String, String> nameByTab = new LinkedHashMap<>();
+        for (JsonNode w : herdr.call("workspace.list").path("workspaces")) {
+            Workspace ws = Workspace.from(w);
+            if (ws.workspaceId() == null || excludedWorkspaceLabels.contains(ws.label())) {
+                continue;
+            }
+            for (JsonNode t : herdr.call("tab.list", Map.of("workspace_id", ws.workspaceId())).path("tabs")) {
+                Tab tab = Tab.from(t);
+                String name = leadNameOf(tab.label());
+                if (name != null && tab.tabId() != null) {
+                    nameByTab.put(tab.tabId(), name);
+                }
+            }
+        }
+
+        Map<String, String> byTerminal = new LinkedHashMap<>();
+        if (!nameByTab.isEmpty()) {
+            // One pane.list for every tab: panes carry tab_id, so the join is local.
+            for (JsonNode p : herdr.call("pane.list", Map.of()).path("panes")) {
+                String name = nameByTab.get(p.path("tab_id").asText(null));
+                String terminal = p.path("terminal_id").asText(null);
+                if (name != null && terminal != null && !terminal.isBlank()) {
+                    byTerminal.put(terminal, name);
+                }
+            }
+        }
+        byTerminal.putAll(configuredLeads); // an explicit pin outranks a label
+        return Collections.unmodifiableMap(byTerminal);
+    }
+
+    /**
+     * The lead name a tab label declares, or {@code null} if it declares none.
+     *
+     * <p>{@code "lead: opus-5.0"} → {@code "opus-5.0"}. A bare {@code "lead:"} names nobody and is
+     * rejected: an unnamed lead would resolve as {@code PRIMARY} with nothing to attribute it to.
+     */
+    private String leadNameOf(String label) {
+        if (label == null) {
+            return null;
+        }
+        String l = label.strip();
+        if (!l.regionMatches(true, 0, tabPrefix, 0, tabPrefix.length())) {
+            return null;
+        }
+        String name = l.substring(tabPrefix.length()).strip();
+        return name.isEmpty() ? null : name;
+    }
+}

bridged/src/main/java/dev/ltms/bridged/herdr/PaneLocator.java

@@ -0,0 +1,59 @@
+package dev.ltms.bridged.herdr;
+
+import com.fasterxml.jackson.databind.JsonNode;
+
+import java.util.Map;
+
+/**
+ * Resolves which herdr pane a process belongs to — the herdr half of connection-based MCP
+ * identity (CB-105). Given the PID that opened an MCP connection, {@link #terminalForPid} finds
+ * the agent pane whose process tree contains it, so {@code bridged} can tell <em>which worker</em>
+ * is calling without the worker sending anything spoofable.
+ *
+ * <p>herdr owns the PID→pane truth: {@code pane.process_info} reports each pane's {@code shell_pid}
+ * and foreground process PIDs. This scans agent panes; a spawn-time {@code pid→terminal} cache is
+ * the obvious optimization once wired into {@code ClaudeCodeLauncher}.
+ */
+public final class PaneLocator {
+
+    private final HerdrClient herdr;
+
+    public PaneLocator(HerdrClient herdr) {
+        this.herdr = herdr;
+    }
+
+    /**
+     * The {@code terminal_id} of the agent pane whose process tree contains {@code pid}, or
+     * {@code null} if no agent pane owns it (e.g. the caller is the primary, or off-host).
+     */
+    public String terminalForPid(long pid) {
+        if (pid <= 0) {
+            return null;
+        }
+        for (JsonNode pane : herdr.call("pane.list", Map.of()).path("panes")) {
+            String paneId = pane.path("pane_id").asText(null);
+            if (paneId != null && paneOwnsPid(paneId, pid)) {
+                return pane.path("terminal_id").asText(null);
+            }
+        }
+        return null;
+    }
+
+    private boolean paneOwnsPid(String paneId, long pid) {
+        JsonNode info;
+        try {
+            info = herdr.call("pane.process_info", Map.of("pane_id", paneId)).path("process_info");
+        } catch (HerdrException e) {
+            return false; // pane vanished mid-scan — just skip it
+        }
+        if (info.path("shell_pid").asLong(-1) == pid) {
+            return true;
+        }
+        for (JsonNode p : info.path("foreground_processes")) {
+            if (p.path("pid").asLong(-1) == pid) {
+                return true;
+            }
+        }
+        return false;
+    }
+}

bridged/src/main/java/dev/ltms/bridged/herdr/Tab.java

@@ -23,9 +23,9 @@ public record Tab(String tabId, String workspaceId, String label, int paneCount)
     }
 
     /**
-     * A freshly-created tab together with the placeholder shell pane herdr seeds it with.
-     * The caller starts the worker into {@link #tab()} then closes {@link #rootPaneId()} so
-     * only the worker pane remains.
+     * A freshly-created tab together with the shell pane herdr seeds it with. Under protocol 19
+     * the caller starts the worker <em>into</em> {@link #rootPaneId()} — the seed pane's shell
+     * carries the worker's cwd and env from {@code tab.create}, and becomes the worker pane.
      */
     public record Created(Tab tab, String rootPaneId) {
         /** Project a {@code tab_created} result ({@code {tab, root_pane}}). */

bridged/src/main/java/dev/ltms/bridged/herdr/WorkspaceControl.java

@@ -5,6 +5,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.util.ArrayList;
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
@@ -40,6 +41,16 @@ public final class WorkspaceControl {
         return out;
     }
 
+    /** Every tab in {@code workspaceId}, in herdr's order. */
+    public List<Tab> listTabs(String workspaceId) {
+        JsonNode result = herdr.call("tab.list", Map.of("workspace_id", workspaceId));
+        List<Tab> out = new ArrayList<>();
+        for (JsonNode t : result.path("tabs")) {
+            out.add(Tab.from(t));
+        }
+        return out;
+    }
+
     /** The first workspace with this exact label, if any. */
     public Optional<Workspace> findByLabel(String label) {
         return listWorkspaces().stream()
@@ -65,13 +76,37 @@ public final class WorkspaceControl {
     }
 
     /**
-     * A brand-new tab in {@code workspaceId} plus the placeholder shell pane herdr seeds
-     * it with. Start the worker into the tab, then {@code pane.close} the root pane so the
-     * tab holds only the worker.
+     * A brand-new tab in {@code workspaceId} plus the shell pane herdr seeds it with. Under
+     * protocol 19 that seed pane is where the worker <em>starts</em>: its shell carries
+     * {@code cwd} and {@code env} (the worker's {@code ANTHROPIC_BASE_URL} — this is the
+     * subscription-injection seam now), and {@code agent.start} launches the agent into it.
      */
-    public Tab.Created createTab(String workspaceId) {
-        JsonNode result = herdr.call("tab.create", Map.of("workspace_id", workspaceId));
-        return Tab.Created.from(result);
+    public Tab.Created createTab(String workspaceId, String cwd, Map<String, String> env) {
+        Map<String, Object> params = new LinkedHashMap<>();
+        params.put("workspace_id", workspaceId);
+        if (cwd != null && !cwd.isBlank()) {
+            params.put("cwd", cwd);
+        }
+        if (env != null && !env.isEmpty()) {
+            params.put("env", env);
+        }
+        return Tab.Created.from(herdr.call("tab.create", params));
+    }
+
+    /**
+     * Split the currently-focused tab and return the new pane's id — the legacy pane placement's
+     * seed pane, carrying {@code cwd} and {@code env} exactly as {@link #createTab}'s does.
+     */
+    public String splitPane(String cwd, Map<String, String> env) {
+        Map<String, Object> params = new LinkedHashMap<>();
+        params.put("direction", "right");
+        if (cwd != null && !cwd.isBlank()) {
+            params.put("cwd", cwd);
+        }
+        if (env != null && !env.isEmpty()) {
+            params.put("env", env);
+        }
+        return herdr.call("pane.split", params).path("pane").path("pane_id").asText(null);
     }
 
     /** Give a worker's tab a human label in the tab bar. */

bridged/src/main/java/dev/ltms/bridged/inject/CompletionResolver.java

@@ -0,0 +1,279 @@
+package dev.ltms.bridged.inject;
+
+import dev.ltms.bridged.herdr.AgentControl;
+import dev.ltms.bridged.msg.Rendezvous;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * The CB-106 completion fallback: bridges the {@link Injector}'s turn-completion signal to the
+ * {@link Rendezvous} so a blocking {@code bridge_send} resolves even when the worker finishes its
+ * task without ever calling {@code bridge_reply} — the common case for a real delegated coding task.
+ *
+ * <p>On a confirmed {@code working → idle} boundary it scrapes the worker's recent transcript and
+ * resolves the awaiting send with that tail (a {@link Rendezvous.Kind#COMPLETION} resolution, so the
+ * caller can tell a scrape from a structured reply). It scrapes only when a send is actually waiting
+ * — a fleet worker's own turns, or a send that already timed out, cost no herdr traffic. An explicit
+ * {@code bridge_reply} that raced in first wins; {@link Rendezvous#resolveCompletion} is then a no-op.
+ *
+ * <p>It also handles the CB-109 stall signal ({@link #onTurnFailed}): a worker that ran a turn then
+ * wedged in an {@code unknown} state resolves the send as a failure (with the error screen as
+ * context) rather than leaving it to time out.
+ *
+ * <p>The scrape is cleaned to the last {@code ⏺} assistant block (stripping TUI chrome) and guarded
+ * against misattribution (CB-115): the pane content is baselined on delivery ({@link #onDelivered}),
+ * and a completion whose scrape is unchanged from that baseline — the previous turn's wind-down
+ * sampled as this turn's boundary on a rapid back-to-back send — is suppressed rather than resolving
+ * the send with a stale answer.
+ *
+ * <p><strong>Waiter-specific resolution (CB-116).</strong> On delivery we also capture the exact
+ * {@link Rendezvous} waiter this turn belongs to, and the completion/failure fallbacks resolve
+ * <em>that</em> waiter — never "whatever send is waiting now". A completion fallback runs on a virtual
+ * thread and can land after the worker's {@code bridge_reply} already resolved the turn and the
+ * <em>next</em> send opened its own waiter on the same session; resolving the current waiter would
+ * then deliver turn N's stale scrape as turn N+1's answer. Targeting the captured waiter makes a late
+ * completion a harmless no-op (its waiter is already done) instead of a cross-turn stale reply.
+ *
+ * <p>Wired as the {@link Injector}'s {@link TurnListener}; the handlers hand off to a virtual thread
+ * so the scrape's herdr round-trip never stalls the status poller. The captured waiter is read on the
+ * poller thread (before any next-turn delivery can overwrite it) and passed into the virtual thread.
+ */
+public final class CompletionResolver implements TurnListener {
+
+    private static final Logger log = LoggerFactory.getLogger(CompletionResolver.class);
+
+    /**
+     * herdr {@code agent.read} source for the completion scrape. {@code recent} returns the tail of
+     * the transcript (the worker's last output), which is what a delegator wants when the worker
+     * didn't structure a reply.
+     */
+    static final String SCRAPE_SOURCE = "recent";
+
+    /** Cap the scraped tail so a long transcript can't return an unbounded blob. */
+    static final int MAX_SCRAPE_CHARS = 4000;
+
+    private static final String CLIPPED_PANE_TAIL_MARKER =
+            "[Pane tail clipped: member did not call bridge_reply.]";
+
+    private final AgentControl agents;
+    private final Rendezvous rendezvous;
+
+    /**
+     * Per-target record of the turn currently in flight: the exact {@link Rendezvous} waiter its
+     * delivering send opened, plus the assistant block present when it was delivered.
+     *
+     * <p>The {@code waiter} is what makes a late fallback safe (CB-116): we resolve it, not "whoever
+     * is waiting now", so a completion that fires after the next send has opened its own waiter is a
+     * no-op rather than a cross-turn stale reply. The {@code baseline} is the CB-115 staleness
+     * reference: a completion scrape equal to it means the worker produced no new output (the previous
+     * turn's wind-down sampled as this boundary), so it is suppressed. Overwritten on each delivery;
+     * cleared when the turn resolves. Package-private so tests can capture and replay a specific turn.
+     */
+    record InFlight(CompletableFuture<Rendezvous.Resolution> waiter, String baseline) {
+    }
+
+    private final ConcurrentHashMap<String, InFlight> inFlight = new ConcurrentHashMap<>();
+
+    public CompletionResolver(AgentControl agents, Rendezvous rendezvous) {
+        this.agents = agents;
+        this.rendezvous = rendezvous;
+    }
+
+    @Override
+    public void onDelivered(String target) {
+        // Capture the exact waiter this turn belongs to (CB-116) and snapshot the pane's pre-turn
+        // content — what it shows *before* the just-delivered turn produces output — as the staleness
+        // reference (CB-115). Done synchronously (like the delivering send itself) so both are in
+        // place before this turn's completion can fire.
+        captureBaseline(target);
+    }
+
+    /** Capture the in-flight turn: its waiter and pre-turn baseline (the testable core of {@link #onDelivered}). */
+    void captureBaseline(String target) {
+        CompletableFuture<Rendezvous.Resolution> waiter = rendezvous.currentWaiter(target);
+        if (waiter == null) {
+            inFlight.remove(target); // no send is waiting on this delivery — nothing to resolve later
+            return;
+        }
+        String baseline;
+        try {
+            // Clip to the same cap resolve() applies to the tail (line ~134): the CB-115 misattribution
+            // guard compares baseline.equals(tail), so both sides must be the same capped representation.
+            // An unclipped baseline vs a clipped tail would never match for a >MAX_SCRAPE_CHARS block,
+            // defeating the guard and letting a stale completion resolve the send.
+            baseline = clip(lastAssistantBlock(agents.read(target, SCRAPE_SOURCE)));
+        } catch (RuntimeException e) {
+            baseline = null; // fail open: no baseline ⇒ no suppression
+            log.debug("delivery baseline for {} failed: {}", target, e.getMessage());
+        }
+        inFlight.put(target, new InFlight(waiter, baseline));
+    }
+
+    /** The turn currently baselined for {@code target}, or {@code null} — a test hook for the captureBaseline path. */
+    InFlight inFlight(String target) {
+        return inFlight.get(target);
+    }
+
+    @Override
+    public void onTurnComplete(String target) {
+        // Read the in-flight turn on the poller thread — before any next-turn delivery can overwrite
+        // it — then off-load the scrape (a herdr round-trip we must not block polling on) to a vthread.
+        InFlight turn = inFlight.get(target);
+        Thread.ofVirtual().name("completion-" + target).start(() -> resolve(target, turn));
+    }
+
+    /**
+     * Resolve the completed turn before adapter housekeeping can erase its rendered output. This is
+     * intentionally synchronous and used only when a post-turn context reset is enabled; the normal
+     * path remains off-loaded so polling is not blocked by a scrape.
+     */
+    public void resolveBeforePostAction(String target) {
+        resolve(target, inFlight.get(target));
+    }
+
+    @Override
+    public void onTurnFailed(String target) {
+        InFlight turn = inFlight.get(target);
+        Thread.ofVirtual().name("turn-failed-" + target).start(() -> fail(target, turn));
+    }
+
+    /** Synchronous resolve (the unit-testable core of {@link #onTurnComplete}). */
+    void resolve(String target, InFlight turn) {
+        CompletableFuture<Rendezvous.Resolution> waiter = turn == null ? null : turn.waiter();
+        if (waiter == null || waiter.isDone()) {
+            // Nobody is blocked on THIS turn (it had no send, or its bridge_reply already won). Skip
+            // the scrape; resolving the current waiter here would be the CB-116 cross-turn stale reply.
+            inFlight.remove(target, turn);
+            return;
+        }
+        String tail;
+        int originalLength = 0;
+        boolean clipped = false;
+        boolean scrapeFailed = false;
+        try {
+            String assistantBlock = lastAssistantBlock(agents.read(target, SCRAPE_SOURCE));
+            originalLength = assistantBlock.strip().length();
+            clipped = originalLength > MAX_SCRAPE_CHARS;
+            tail = clip(assistantBlock);
+        } catch (RuntimeException e) {
+            // The worker finished but we couldn't read its screen — still resolve the send so the
+            // caller unblocks; an empty tail beats hanging until the caller's timeout.
+            log.warn("completion scrape for {} failed; resolving with an empty tail: {}",
+                    target, e.getMessage());
+            tail = "";
+            scrapeFailed = true;
+        }
+        // Misattribution guard (CB-115): if the scrape is byte-identical to the pane content at
+        // delivery, this turn produced no new output — the boundary belongs to the previous turn's
+        // wind-down (common on rapid back-to-back sends). Suppress rather than resolve the send with
+        // a stale answer; the real bridge_reply (or a later genuine completion) resolves it instead.
+        // A scrape that failed to read is exempt — an empty tail there is "couldn't see", not "no change".
+        String baseline = turn.baseline();
+        if (!scrapeFailed && baseline != null && baseline.equals(tail)) {
+            log.debug("suppressing misattributed completion for {} (no output change since delivery)",
+                    target);
+            return; // keep the in-flight record: a later genuine completion still needs it
+        }
+        String completion = clipped ? tail + "\n" + CLIPPED_PANE_TAIL_MARKER : tail;
+        if (rendezvous.resolveCompletion(waiter, completion)) {
+            inFlight.remove(target, turn);
+            if (clipped) {
+                log.warn("completion scrape for {} clipped from {} chars to the {} char cap; "
+                                + "member did not call bridge_reply, so the pane tail is partial",
+                        target, originalLength, MAX_SCRAPE_CHARS);
+            }
+            log.debug("resolved send to {} via turn-completion fallback ({} chars scraped)",
+                    target, tail.length());
+        }
+    }
+
+    /** Synchronous fail (the unit-testable core of {@link #onTurnFailed}). */
+    void fail(String target, InFlight turn) {
+        // A never-delivered readiness failure has no in-flight record but still has a blocked send;
+        // fall back to the currently-registered waiter (unambiguous — that send never completed, so
+        // no next turn exists to confuse it with).
+        CompletableFuture<Rendezvous.Resolution> waiter =
+                turn != null ? turn.waiter() : rendezvous.currentWaiter(target);
+        if (waiter == null || waiter.isDone()) {
+            inFlight.remove(target, turn); // nobody blocked on this worker — nothing to fail
+            return;
+        }
+        String reason;
+        try {
+            reason = clip(agents.read(target, SCRAPE_SOURCE));
+        } catch (RuntimeException e) {
+            reason = "";
+        }
+        if (reason.isBlank()) {
+            // No screen to scrape — either the worker is stuck (CB-109) or gone (CB-110).
+            reason = "worker did not reply; its turn ended in an unrecoverable state "
+                    + "(worker unreachable or stuck)";
+        }
+        if (rendezvous.resolveFailure(waiter, reason)) {
+            inFlight.remove(target, turn);
+            log.warn("failing send to {} via turn-stall fallback: {}", target, reason);
+        }
+    }
+
+    private static String clip(String s) {
+        if (s == null) return "";
+        String trimmed = s.strip();
+        return trimmed.length() <= MAX_SCRAPE_CHARS
+                ? trimmed
+                : trimmed.substring(trimmed.length() - MAX_SCRAPE_CHARS);
+    }
+
+    /**
+     * Extract the last assistant message from a raw Claude Code pane scrape (CB-115). Claude Code
+     * prefixes each assistant turn with {@code ⏺}; the delegator wants that answer, not the TUI
+     * chrome around it. Take everything from the final {@code ⏺} onward and stop at the <em>first</em>
+     * hard interface boundary below it — the spinner/status line, input box, {@code ❯} prompt (which
+     * may echo the <em>next</em> turn's text), footer, or tips/warnings. Stopping at the first
+     * boundary (rather than trimming only trailing chrome) is what keeps a following turn's echoed
+     * prompt out of this reply. Blank lines are not boundaries, so a multi-paragraph answer survives;
+     * trailing blanks are trimmed at the end. With no {@code ⏺} marker (an unusual render) the whole
+     * text is scanned the same way, so we never lose the reply.
+     *
+     * <p>Package-private and pure so it is unit-testable without herdr.
+     */
+    static String lastAssistantBlock(String raw) {
+        if (raw == null || raw.isBlank()) return "";
+        int marker = raw.lastIndexOf('⏺');
+        String block = marker >= 0 ? raw.substring(marker + 1) : raw;
+        StringBuilder out = new StringBuilder();
+        int kept = 0;
+        for (String line : block.split("\n", -1)) {
+            if (isBoundary(line)) break; // first TUI boundary ends the assistant message
+            if (kept++ > 0) out.append('\n');
+            out.append(line);
+        }
+        return out.toString().strip();
+    }
+
+    /**
+     * A hard TUI boundary line that marks the end of an assistant message and the start of interface
+     * chrome (input box, prompt, spinner, footer, tips/warnings). Blank lines are <em>not</em>
+     * boundaries — an answer may contain them — so they are kept and trimmed only if trailing.
+     */
+    private static boolean isBoundary(String line) {
+        String t = line.strip();
+        if (t.isEmpty()) return false;
+        // A horizontal rule / all box-drawing separators (e.g. "──────").
+        if (t.chars().allMatch(c -> c == '─' || c == '—' || c == '━' || c == '═' || c == '-')) {
+            return true;
+        }
+        String lower = t.toLowerCase();
+        return t.startsWith("╭") || t.startsWith("│") || t.startsWith("╰") || t.startsWith("┌")
+                || t.startsWith("└") || t.startsWith("❯") || t.startsWith("⏵")
+                || t.startsWith("⎿") || t.startsWith("⚠")
+                // Status/spinner lines Claude Code renders below a settled or in-flight turn,
+                // e.g. "✻ Baked for 21s", "✶ Forming…".
+                || t.startsWith("✻") || t.startsWith("✳") || t.startsWith("✽") || t.startsWith("·")
+                || t.startsWith("●") || t.startsWith("◐") || t.startsWith("✢") || t.startsWith("✶")
+                || lower.contains("auto mode") || lower.contains("for shortcuts")
+                || lower.contains("esc to interrupt") || lower.contains("bypass permissions");
+    }
+}

bridged/src/main/java/dev/ltms/bridged/inject/Injector.java

@@ -12,6 +12,8 @@ import java.util.List;
 import java.util.Set;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Consumer;
+import java.util.function.Predicate;
 import java.util.stream.Collectors;
 
 /**
@@ -32,6 +34,14 @@ import java.util.stream.Collectors;
  * a transient {@code unknown} — counts as a real pickup, so a detection glitch can't prematurely
  * release the latch. Perfectly reliable turn boundaries require a herdr {@code events.subscribe}
  * stream; that is the intended upgrade and would replace only the sampling, not this queue.
+ *
+ * <p><strong>Turn completion (CB-106).</strong> Beyond delivery, the injector reports when a
+ * delegated turn <em>finishes</em>: after a delivery is picked up (a real {@code working} sample),
+ * the next injectable sample is a confirmed {@code working → idle} boundary and fires
+ * {@link TurnListener#onTurnComplete}. Completion is only ever synthesized from a <em>confirmed</em>
+ * turn — the pickup-grace path (a turn too fast to sample) unwedges the queue but does not fire
+ * completion, since without a sampled {@code working} there is no trustworthy "the worker just
+ * finished the task" signal to act on.
  */
 public final class Injector {
 
@@ -45,11 +55,77 @@ public final class Injector {
      */
     private static final int PICKUP_GRACE_POLLS = 8;
 
+    /**
+     * How many consecutive {@code unknown} samples while a delegation is outstanding before we
+     * declare it stalled and fire {@link TurnListener#onTurnFailed} (CB-109). A worker wedged in a
+     * state herdr can't classify (e.g. an API-error screen) stays {@code unknown} indefinitely and
+     * would otherwise never resolve; any {@code working}/{@code idle} sample resets the streak, so a
+     * transient detection glitch cannot trip it. At the 250ms poll interval this is ~30s — far longer
+     * than any real detection blip, and still vastly better than the async send's timeout.
+     */
+    private static final int TURN_STALL_GRACE_POLLS = 120;
+
+    /**
+     * How many consecutive injectable samples a queued-but-undelivered message may wait on the
+     * {@link #ready} gate before we give up and fail it (CB-114). The gate holds a message out of a
+     * worker's boot window (herdr reports {@code idle} while its Claude is still starting), but a
+     * worker whose Claude crashes during boot — or never connects the bridge MCP — stays "idle and
+     * not ready" forever: {@link #ready} never accepts it, the message is never delivered, and the
+     * target would be polled indefinitely with its caller's future never completing. After this
+     * grace the queued messages are failed and the target released. At the 250ms poll interval this
+     * is ~60s — deliberately longer than {@link #TURN_STALL_GRACE_POLLS}, since a first boot (spawn
+     * + model load + MCP connect) legitimately takes longer than an in-turn detection blip.
+     */
+    private static final int READINESS_GRACE_POLLS = 240;
+
+    /**
+     * The single source for the injector poll cadence — how often the {@link StatusPoller} drives
+     * {@link #onStatus} at. {@code Bridged} passes this to every {@link StatusPoller} it constructs,
+     * and this class reads it to state the readiness grace in seconds on the CB-562 expiry log
+     * instead of hardcoding "60s". One constant, so a cadence change cannot silently desync a log
+     * that claims a grace duration.
+     */
+    public static final long POLL_INTERVAL_MILLIS = 250;
+
     private final AgentControl agents;
+    private final TurnListener turnListener;
+    private final Predicate<String> ready; // CB-113: a target is deliverable only when available
+    private final Consumer<String> forget; // CB-114: clear a gone worker's readiness/presence
     private final ConcurrentHashMap<String, Target> targets = new ConcurrentHashMap<>();
 
+    /** Delivery only; completion signalling is a no-op and every target is treated as available. */
     public Injector(AgentControl agents) {
+        this(agents, TurnListener.NOOP);
+    }
+
+    /** Delivery plus turn-completion signalling (CB-106); every target is treated as available. */
+    public Injector(AgentControl agents, TurnListener turnListener) {
+        this(agents, turnListener, _ -> true);
+    }
+
+    /**
+     * Delivery, completion signalling (CB-106), and a readiness gate (CB-113): a message is delivered
+     * only when {@code ready} accepts the target — i.e. the worker's Claude has connected the bridge
+     * MCP. This holds the first delivery out of the worker's boot window, where herdr already reports
+     * {@code idle} but the TUI would drop an injected paste.
+     */
+    public Injector(AgentControl agents, TurnListener turnListener, Predicate<String> ready) {
+        this(agents, turnListener, ready, _ -> {
+        });
+    }
+
+    /**
+     * Delivery, completion signalling (CB-106), a readiness gate (CB-113), and readiness cleanup
+     * (CB-114): {@code forget} is invoked with a target when its worker is gone — dropped
+     * (pane crash) or timed out on the readiness gate — so its stale presence/readiness is cleared
+     * and does not linger past the worker's life.
+     */
+    public Injector(AgentControl agents, TurnListener turnListener, Predicate<String> ready,
+                    Consumer<String> forget) {
         this.agents = agents;
+        this.turnListener = turnListener;
+        this.ready = ready;
+        this.forget = forget;
     }
 
     /** A pending message and the future that completes when it has been delivered. */
@@ -59,8 +135,16 @@ public final class Injector {
     /** Per-worker delivery state, guarded by its own monitor (single writer per worker). */
     private static final class Target {
         final Deque<Pending> queue = new ArrayDeque<>();
-        boolean awaitingPickup;   // sent a message, waiting for the worker to pick it up
+        boolean awaitingPickup;    // sent a message, waiting for the worker to pick it up
         int injectableSincePickup; // consecutive injectable samples while awaitingPickup
+        boolean awaitingCompletion; // a delivered message's turn is not yet known-complete
+        boolean turnObserved;      // saw a real `working` sample since that delivery (turn ran)
+        int unknownSinceTurn;      // consecutive `unknown` samples while a delegation is outstanding (CB-109)
+        int notReadySincePoll;     // consecutive injectable samples a queued message waited on the readiness gate (CB-114)
+        boolean postTurnPending;   // completion observed; adapter housekeeping has not started yet
+        boolean awaitingPostTurnPickup;
+        boolean postTurnObserved;
+        int injectableSincePostTurnPickup;
 
         synchronized void add(Pending p) {
             queue.add(p);
@@ -99,63 +183,196 @@ public final class Injector {
 
         Pending sent = null;
         RuntimeException sendError = null;
+        boolean turnCompleted = false;
+        boolean turnFailed = false;
+        boolean resubmit = false;
+        boolean startPostTurn = false;
+        List<Pending> notReady = null; // queued messages failed because the worker never became ready
         synchronized (t) {
             if (status == AgentStatus.WORKING) {
-                // Definitive pickup: the worker is busy on our last message.
+                if (t.awaitingPostTurnPickup) {
+                    t.awaitingPostTurnPickup = false;
+                    t.injectableSincePostTurnPickup = 0;
+                    t.postTurnObserved = true;
+                }
+                // Definitive pickup: the worker is busy on our last message, and (if a delivery is
+                // outstanding) a real turn is now confirmed to be running.
                 t.awaitingPickup = false;
                 t.injectableSincePickup = 0;
+                t.unknownSinceTurn = 0;
+                t.notReadySincePoll = 0;
+                if (t.awaitingCompletion) t.turnObserved = true;
             } else if (status.injectable()) { // IDLE or BLOCKED
-                if (t.awaitingPickup && ++t.injectableSincePickup >= PICKUP_GRACE_POLLS) {
-                    // Pickup edge was never sampled (turn faster than the poll, or status lag).
-                    // The worker has plainly moved on — release the latch rather than wedge.
-                    t.awaitingPickup = false;
-                    t.injectableSincePickup = 0;
+                t.unknownSinceTurn = 0;
+                if (t.awaitingPostTurnPickup) {
+                    if (++t.injectableSincePostTurnPickup >= PICKUP_GRACE_POLLS) {
+                        t.awaitingPostTurnPickup = false;
+                        t.injectableSincePostTurnPickup = 0;
+                    } else {
+                        resubmit = true;
+                    }
+                } else if (t.postTurnObserved) {
+                    t.postTurnObserved = false;
+                }
+                if (t.awaitingPickup) {
+                    if (++t.injectableSincePickup >= PICKUP_GRACE_POLLS) {
+                        // Pickup edge was never sampled (turn faster than the poll, or status lag).
+                        // Release the latch rather than wedge — and give up on synthesizing a
+                        // completion for this message, since without a confirmed `working` we cannot
+                        // trust that a task-processing turn actually ran.
+                        t.awaitingPickup = false;
+                        t.injectableSincePickup = 0;
+                        t.awaitingCompletion = false;
+                        t.turnObserved = false;
+                    } else {
+                        // Delivered but still idle → the worker hasn't picked it up; the submit
+                        // keystroke likely raced the paste (esp. right as the TUI became ready).
+                        // Re-nudge Enter (CB-113) until the worker starts (WORKING) or the grace ends.
+                        resubmit = true;
+                    }
                 }
                 if (!t.awaitingPickup) {
-                    Pending p = t.queue.peek();
-                    if (p != null) {
-                        try {
-                            agents.send(target, p.text());
-                            t.queue.poll();
-                            t.awaitingPickup = true;
-                            t.injectableSincePickup = 0;
-                            sent = p;
-                        } catch (RuntimeException e) {
-                            // Delivery failed at herdr; drop the poisoned message and surface it
-                            // rather than blocking the queue behind it.
-                            t.queue.poll();
-                            sent = p;
-                            sendError = e;
+                    // A confirmed turn (a `working` sample was seen) that has now returned to idle is
+                    // a trustworthy `working → idle` completion boundary.
+                    if (t.awaitingCompletion && t.turnObserved) {
+                        t.awaitingCompletion = false;
+                        t.turnObserved = false;
+                        turnCompleted = true;
+                        if (turnListener.hasPostTurnAction(target)) {
+                            t.postTurnPending = true;
+                            startPostTurn = true;
+                        }
+                    }
+                    // Deliver the next queued message only once the prior turn is fully settled, so a
+                    // completion is never confused with the pickup of the following message — and only
+                    // once the worker is available (CB-113), so we never paste into its boot window.
+                    if (!t.awaitingCompletion && !t.postTurnPending
+                            && !t.awaitingPostTurnPickup && !t.postTurnObserved) {
+                        Pending p = t.queue.peek();
+                        if (p != null && ready.test(target)) {
+                            t.notReadySincePoll = 0;
+                            try {
+                                agents.send(target, p.text());
+                                t.queue.poll();
+                                t.awaitingPickup = true;
+                                t.awaitingCompletion = true;
+                                t.turnObserved = false;
+                                t.injectableSincePickup = 0;
+                                sent = p;
+                            } catch (RuntimeException e) {
+                                // Delivery failed at herdr; drop the poisoned message and surface it
+                                // rather than blocking the queue behind it.
+                                t.queue.poll();
+                                sent = p;
+                                sendError = e;
+                            }
+                        } else if (p != null && ++t.notReadySincePoll >= READINESS_GRACE_POLLS) {
+                            // The worker has been idle-but-not-ready for the whole grace: its Claude
+                            // never connected the bridge MCP (crashed during boot, or wedged on a
+                            // startup prompt). The readiness gate would hold this message forever, so
+                            // fail every queued message and release the target (CB-114) instead of
+                            // polling it indefinitely with the caller's future never completing.
+                            notReady = new ArrayList<>(t.queue);
+                            log.warn("readiness grace for {} expired after {} polls ({}s): target never "
+                                    + "became deliverable, so failing {} queued message(s) that never "
+                                    + "reached its pane",
+                                    target, READINESS_GRACE_POLLS,
+                                    READINESS_GRACE_POLLS * POLL_INTERVAL_MILLIS / 1000, notReady.size());
+                            t.queue.clear();
+                            t.notReadySincePoll = 0;
                         }
                     }
                 }
+            } else {
+                // UNKNOWN (or any other non-injectable, non-working): not a safe window nor a
+                // reliable pickup signal, so we never deliver or release the pickup latch here. But
+                // an outstanding delegation whose worker has gone unresponsive — stuck in a state
+                // herdr can't classify (CB-109) — will never yield a working→idle boundary. After a
+                // sustained streak, declare it failed so the awaiting send resolves rather than
+                // riding out the async timeout. (This also frees a delivery that wedged before it
+                // was ever picked up, which the injectable-only pickup grace could never release.)
+                if (t.awaitingCompletion && ++t.unknownSinceTurn >= TURN_STALL_GRACE_POLLS) {
+                    t.awaitingPickup = false;
+                    t.awaitingCompletion = false;
+                    t.turnObserved = false;
+                    t.unknownSinceTurn = 0;
+                    turnFailed = true;
+                }
             }
-            // UNKNOWN (and any other non-injectable, non-working): do nothing — neither a safe
-            // window nor a reliable pickup signal, so we must not deliver or release the latch.
 
-            // Reclaim the entry once the worker is fully quiescent, so the map cannot grow without
-            // bound across many short-lived workers.
-            if (t.queue.isEmpty() && !t.awaitingPickup) {
+            // Reclaim the entry once the worker is fully quiescent (nothing queued, no pickup or
+            // completion awaited), so the map cannot grow without bound across short-lived workers.
+            if (t.queue.isEmpty() && !t.awaitingPickup && !t.awaitingCompletion
+                    && !t.postTurnPending && !t.awaitingPostTurnPickup && !t.postTurnObserved) {
                 targets.remove(target, t);
             }
         }
 
+        // Fire listeners / herdr calls after releasing the monitor so nothing runs on the poller
+        // thread while it holds the target lock.
+        if (resubmit) {
+            try {
+                agents.submit(target); // nudge a raced Enter so the pending paste submits
+            } catch (RuntimeException e) {
+                log.debug("resubmit to {} failed (will retry next poll): {}", target, e.getMessage());
+            }
+        }
+        if (notReady != null) {
+            // Worker never became available: forget its (never-set) readiness, unblock every queued
+            // caller, and route the awaiting send through the same failure path as a stalled turn so
+            // a blocking or async waiter resolves WORKER_FAILED rather than riding out the timeout.
+            forget.accept(target);
+            RuntimeException cause = new IllegalStateException(
+                    target + " never became available (no bridge MCP connection within the boot window)");
+            for (Pending p : notReady) {
+                p.delivered().completeExceptionally(cause);
+            }
+            turnListener.onTurnFailed(target);
+        }
+        if (turnCompleted) {
+            if (startPostTurn) {
+                boolean started = turnListener.onTurnCompleteWithPostAction(target);
+                synchronized (t) {
+                    t.postTurnPending = false;
+                    if (started) {
+                        t.awaitingPostTurnPickup = true;
+                        t.injectableSincePostTurnPickup = 0;
+                    }
+                    if (t.queue.isEmpty() && !t.awaitingPostTurnPickup) {
+                        targets.remove(target, t);
+                    }
+                }
+            } else {
+                turnListener.onTurnComplete(target);
+            }
+        }
+        if (turnFailed) {
+            turnListener.onTurnFailed(target);
+        }
         if (sent != null) {
             if (sendError != null) {
                 log.warn("inject to {} failed, dropped message: {}", target, sendError.getMessage());
                 sent.delivered().completeExceptionally(sendError);
             } else {
+                // Baseline the pane's pre-turn content so a misattributed completion (no new output)
+                // can't resolve this send with the previous turn's stale answer (CB-115).
+                turnListener.onDelivered(target);
                 sent.delivered().complete(null);
             }
         }
     }
 
-    /** Targets the poller must keep sampling: those with a queued message or an awaited pickup. */
+    /**
+     * Targets the poller must keep sampling: those with a queued message, an awaited pickup, or an
+     * awaited turn completion (so the {@code working → idle} boundary is observed).
+     */
     public Set<String> activeTargets() {
         return targets.entrySet().stream()
                 .filter(e -> {
                     synchronized (e.getValue()) {
-                        return !e.getValue().queue.isEmpty() || e.getValue().awaitingPickup;
+                        Target t = e.getValue();
+                        return !t.queue.isEmpty() || t.awaitingPickup || t.awaitingCompletion
+                                || t.postTurnPending || t.awaitingPostTurnPickup || t.postTurnObserved;
                     }
                 })
                 .map(java.util.Map.Entry::getKey)
@@ -163,20 +380,38 @@ public final class Injector {
     }
 
     /**
-     * Forget a target whose worker is gone, failing every still-queued message so awaiting
-     * callers unblock instead of hanging forever. Futures are completed after the monitor is
-     * released.
+     * Forget a target whose worker is gone, failing every still-queued message so awaiting callers
+     * unblock instead of hanging forever. If a message had already been <em>delivered</em> but its
+     * turn was not yet resolved (CB-110 — the worker vanished mid-turn, e.g. its pane crashed), fire
+     * {@link TurnListener#onTurnFailed} for it: a delivered message is no longer in the queue, so
+     * failing queued waiters alone would leave that send's rendezvous hanging until the async
+     * timeout. Futures and listeners are completed after the monitor is released.
      */
     public void drop(String target, Throwable cause) {
         Target t = targets.remove(target);
         if (t == null) return;
         List<Pending> pending;
+        boolean hadDeliveredTurn;
         synchronized (t) {
             pending = new ArrayList<>(t.queue);
             t.queue.clear();
+            hadDeliveredTurn = t.awaitingCompletion;
+            t.awaitingCompletion = false;
+            t.awaitingPickup = false;
+            t.postTurnPending = false;
+            t.awaitingPostTurnPickup = false;
+            t.postTurnObserved = false;
         }
+        log.warn("{} is gone, dropping its queue: {} message(s) failed{}; cause: {}", target,
+                pending.size(),
+                hadDeliveredTurn ? " (including one turn already in flight whose completion was never confirmed)" : "",
+                cause.getMessage());
+        forget.accept(target); // the worker is gone — clear its readiness/presence too (CB-114)
         for (Pending p : pending) {
             p.delivered().completeExceptionally(cause);
         }
+        if (hadDeliveredTurn) {
+            turnListener.onTurnFailed(target);
+        }
     }
 }

bridged/src/main/java/dev/ltms/bridged/inject/MemberPresence.java

@@ -0,0 +1,38 @@
+package dev.ltms.bridged.inject;
+
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.Set;
+
+/**
+ * Tracks which workers are <em>available</em> — their Claude has booted and connected its MCP client
+ * to the bridge (CB-113). This is the reliable readiness signal, unlike herdr's {@code agent_status},
+ * which reports {@code idle} for a worker whose Claude is still booting. Delivering into that boot
+ * window pastes into a not-yet-ready TUI (the text is lost) and wedges the worker's delivery state,
+ * so the {@link Injector} holds the first delivery until the worker is present here.
+ *
+ * <p>Populated from the MCP transport: any MCP request whose connection resolves to a worker terminal
+ * marks that worker present (its {@code initialize} is the first such contact). A worker that never
+ * mounts the bridge MCP is never marked present — its sends stay queued until they time out, which is
+ * correct (it could not have replied anyway).
+ */
+public class MemberPresence {
+
+    private final Set<String> present = ConcurrentHashMap.newKeySet();
+
+    /** Record that {@code terminal}'s worker has connected its MCP client (is available). */
+    public void markPresent(String terminal) {
+        if (terminal != null && !terminal.isBlank()) {
+            present.add(terminal);
+        }
+    }
+
+    /** Whether {@code terminal}'s worker is available (has been seen on the bridge MCP). */
+    public boolean isPresent(String terminal) {
+        return present.contains(terminal);
+    }
+
+    /** Forget a torn-down worker so its terminal id does not linger as "present". */
+    public void forget(String terminal) {
+        present.remove(terminal);
+    }
+}

bridged/src/main/java/dev/ltms/bridged/inject/StatusPoller.java

@@ -23,13 +23,20 @@ public final class StatusPoller {
 
     private final AgentControl agents;
     private final Injector injector;
+    private final StatusRefiner refiner;
     private final long intervalMillis;
     private volatile boolean running;
     private Thread thread;
 
     public StatusPoller(AgentControl agents, Injector injector, long intervalMillis) {
+        this(agents, injector, new StatusRefiner(agents), intervalMillis);
+    }
+
+    public StatusPoller(AgentControl agents, Injector injector, StatusRefiner refiner,
+                        long intervalMillis) {
         this.agents = agents;
         this.injector = injector;
+        this.refiner = refiner;
         this.intervalMillis = intervalMillis;
     }
 
@@ -47,7 +54,9 @@ public final class StatusPoller {
             for (String target : active) {
                 if (!running) return;
                 try {
-                    AgentStatus status = agents.status(target);
+                    // herdr's agent_status can misreport a settled worker as `unknown`; refine it
+                    // against the pane content before it drives delivery/completion (CB-115).
+                    AgentStatus status = refiner.refine(target, agents.status(target));
                     injector.onStatus(target, status);
                 } catch (HerdrException e) {
                     // The worker's agent is gone — stop trying and unblock its waiters.

bridged/src/main/java/dev/ltms/bridged/inject/StatusRefiner.java

@@ -0,0 +1,89 @@
+package dev.ltms.bridged.inject;
+
+import dev.ltms.bridged.herdr.AgentControl;
+import dev.ltms.bridged.herdr.AgentStatus;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Refines an unreliable {@link AgentStatus#UNKNOWN} into a real state by reading the worker's
+ * terminal content (CB-115).
+ *
+ * <p>Some workers' panes are misclassified by herdr as {@code unknown} even when the worker is
+ * plainly settled at an idle prompt (empty {@code ❯}, "auto mode on" footer, a completed
+ * {@code ⏺} answer above). Left as {@code UNKNOWN} that both <em>wedges delivery</em> — the
+ * status-gated {@link Injector} only injects into an {@link AgentStatus#injectable} worker — and
+ * <em>mis-fires the CB-109 stall failure</em> on a worker that has actually answered. herdr's
+ * {@code agent_status} is a heuristic; the pane content is the ground truth.
+ *
+ * <p>The refinement only ever runs on a raw {@code UNKNOWN} sample (every other status is trusted
+ * as-is), so a healthy worker adds zero extra herdr traffic; a persistently-{@code unknown} worker
+ * costs one extra {@code agent.read} per poll while it has work outstanding. Classification is
+ * deliberately conservative — it upgrades {@code UNKNOWN} to {@link AgentStatus#WORKING} or
+ * {@link AgentStatus#IDLE} only on a clear signal, and leaves a genuinely unclassifiable screen
+ * (e.g. a wedged error state) as {@code UNKNOWN} so the CB-109 stall path can still fail it.
+ */
+public final class StatusRefiner {
+
+    private static final Logger log = LoggerFactory.getLogger(StatusRefiner.class);
+
+    /**
+     * herdr {@code agent.read} source used to inspect the pane. {@code detection} is the region
+     * herdr itself uses for status detection (the prompt/footer tail), which is exactly what we
+     * need to tell "idle at prompt" from "mid-turn".
+     */
+    static final String PROBE_SOURCE = "detection";
+
+    private final AgentControl agents;
+
+    public StatusRefiner(AgentControl agents) {
+        this.agents = agents;
+    }
+
+    /**
+     * Return a trustworthy status for {@code target}. Any non-{@code UNKNOWN} {@code raw} is returned
+     * unchanged; an {@code UNKNOWN} triggers a pane read and content classification. A read failure
+     * leaves it {@code UNKNOWN} (the safe default: no delivery, and the stall path still applies).
+     */
+    public AgentStatus refine(String target, AgentStatus raw) {
+        if (raw != AgentStatus.UNKNOWN) return raw;
+        String pane;
+        try {
+            pane = agents.read(target, PROBE_SOURCE);
+        } catch (RuntimeException e) {
+            log.debug("status refine read for {} failed; leaving UNKNOWN: {}", target, e.getMessage());
+            return AgentStatus.UNKNOWN;
+        }
+        AgentStatus refined = classify(pane);
+        if (refined != AgentStatus.UNKNOWN) {
+            log.debug("refined {} from UNKNOWN to {} via pane content", target, refined);
+        }
+        return refined;
+    }
+
+    /**
+     * Classify a Claude Code TUI pane tail. Package-private and pure so it is unit-testable without
+     * herdr.
+     *
+     * <ul>
+     *   <li>An active-generation marker ({@code esc to interrupt}) ⇒ {@link AgentStatus#WORKING} —
+     *       never inject here.</li>
+     *   <li>Otherwise, an interactive input prompt with no active-turn marker ({@code ❯}, the
+     *       {@code │ >} input box, or the idle {@code auto mode} / shortcuts footer) ⇒
+     *       {@link AgentStatus#IDLE} — settled and safe to inject / a completed turn.</li>
+     *   <li>Anything else (blank, or an unrecognizable screen) ⇒ {@link AgentStatus#UNKNOWN}.</li>
+     * </ul>
+     */
+    static AgentStatus classify(String pane) {
+        if (pane == null || pane.isBlank()) return AgentStatus.UNKNOWN;
+        String lower = pane.toLowerCase();
+        // Claude Code shows "(esc to interrupt)" only while a turn is actively generating.
+        if (lower.contains("esc to interrupt")) return AgentStatus.WORKING;
+        // A settled, ready input prompt with no active-turn marker = idle-at-prompt.
+        boolean readyPrompt = pane.contains("❯")
+                || pane.contains("│ >")
+                || lower.contains("auto mode on")
+                || lower.contains("? for shortcuts");
+        return readyPrompt ? AgentStatus.IDLE : AgentStatus.UNKNOWN;
+    }
+}

bridged/src/main/java/dev/ltms/bridged/inject/TurnListener.java

@@ -0,0 +1,58 @@
+package dev.ltms.bridged.inject;
+
+/**
+ * Notified when a worker's delegated turn is observed to complete — a confirmed
+ * {@code WORKING → IDLE} transition after a delivery. This is the CB-106 completion signal the
+ * {@code CompletionResolver} uses to resolve a blocked send whose worker never called
+ * {@code bridge_reply}. Kept as a seam so the {@link Injector} needs no dependency on the message
+ * layer and stays unit-testable with a capturing fake.
+ */
+@FunctionalInterface
+public interface TurnListener {
+
+    /** A worker's delegated turn finished (worker returned to idle after visibly working). */
+    void onTurnComplete(String target);
+
+    /**
+     * Whether completion must pause ordinary delivery while adapter-specific housekeeping starts.
+     * This is queried before the injector considers the next queued message, closing the same-tick
+     * ordering gap. Implementations must not mutate state here.
+     */
+    default boolean hasPostTurnAction(String target) {
+        return false;
+    }
+
+    /**
+     * Complete the delegated turn and start its non-turn housekeeping operation.
+     *
+     * @return true when the injector must observe that operation settle before the next delivery
+     */
+    default boolean onTurnCompleteWithPostAction(String target) {
+        onTurnComplete(target);
+        return false;
+    }
+
+    /**
+     * A worker that visibly ran a delegated turn then wedged in a non-idle, non-working state
+     * (CB-109) — e.g. an error screen herdr classifies as {@code unknown} — so no
+     * {@code working → idle} completion boundary will ever arrive. A default no-op keeps this a
+     * functional interface; the completion resolver overrides it to fail the awaiting send.
+     */
+    default void onTurnFailed(String target) {
+    }
+
+    /**
+     * A message was just delivered into {@code target}'s pane (CB-115). Fired so the completion
+     * resolver can snapshot the pane's pre-turn content: a later {@link #onTurnComplete} whose
+     * scrape is unchanged from this baseline is a <em>misattributed</em> boundary (e.g. the prior
+     * turn's wind-down sampled as this turn's completion on rapid back-to-back sends) and must not
+     * resolve the send with the previous turn's stale answer. A default no-op keeps the interface
+     * functional for callers that don't scrape.
+     */
+    default void onDelivered(String target) {
+    }
+
+    /** No-op default for callers that only need delivery, not completion signalling. */
+    TurnListener NOOP = _ -> {
+    };
+}

bridged/src/main/java/dev/ltms/bridged/lead/LeadLauncher.java

@@ -0,0 +1,304 @@
+package dev.ltms.bridged.lead;
+
+import dev.ltms.bridged.config.BridgedConfig;
+import dev.ltms.bridged.herdr.Agent;
+import dev.ltms.bridged.herdr.AgentControl;
+import dev.ltms.bridged.herdr.HerdrException;
+import dev.ltms.bridged.herdr.Tab;
+import dev.ltms.bridged.herdr.Workspace;
+import dev.ltms.bridged.herdr.WorkspaceControl;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+/**
+ * Starts the leads {@code fleet.leaders:} declares, when none is already running (CB-558).
+ *
+ * <p><strong>A lead is not a member, and this class exists to keep it that way.</strong> Every other
+ * spawn path in the daemon goes through {@code HerdrPeerLauncher}, which does three things a lead
+ * must never receive:
+ * <ol>
+ *   <li>it appends the <em>reply charter</em> — "you are an off-subscription worker … end every turn
+ *       with {@code bridge_reply}". A lead is the orchestrator; telling it that it is a worker is
+ *       exactly backwards.</li>
+ *   <li>it registers the session with {@code SessionManager}, which subjects it to the idle reaper,
+ *       the context cap and the shutdown drain. An idle lead is the normal state of a lead, so the
+ *       reaper would kill the orchestrator for doing its job.</li>
+ *   <li>it can move a peer off the subscription via {@code ANTHROPIC_BASE_URL}. A lead stays on the
+ *       operator's subscription, always.</li>
+ * </ol>
+ * So this launcher talks to {@link AgentControl}/{@link WorkspaceControl} directly. The duplication
+ * with the member launchers (argv and env assembly) is deliberate and is the cheaper half of the
+ * trade: entangling the worker path with a not-a-worker case is how the three rules above get
+ * broken later, quietly.
+ *
+ * <p><strong>Liveness, and the label round-trip.</strong> {@code LeadTabScanner} used to be able to
+ * promise that bridged never writes a lead label. That is no longer true — an auto-launched lead is
+ * labelled by this class, and the scanner reads that label back. The risk this opens is not
+ * privilege escalation (the tab label never granted anything a pane could take for itself; see that
+ * class's javadoc), but <em>staleness</em>: a label left behind by a crashed session would otherwise
+ * read as a live lead forever, and the lead would never be relaunched. So a lead counts as live only
+ * when herdr also reports a <em>running agent</em> in that tab — see {@link #liveLeads}. A labelled
+ * tab with no agent in it is not a lead.
+ */
+public final class LeadLauncher {
+
+    private static final Logger log = LoggerFactory.getLogger(LeadLauncher.class);
+
+    private final AgentControl agents;
+    private final WorkspaceControl spaces;
+    private final BridgedConfig cfg;
+
+    /**
+     * @param agents herdr agent control (start, list)
+     * @param spaces workspace / tab control (ensure, create, label, list)
+     * @param cfg    the loaded config — {@code fleet.leaders}, {@code profiles} and the lead pins
+     */
+    public LeadLauncher(AgentControl agents, WorkspaceControl spaces, BridgedConfig cfg) {
+        this.agents = agents;
+        this.spaces = spaces;
+        this.cfg = cfg;
+    }
+
+    /**
+     * Bring every declared lead up to its {@code instances} count, and return how many were started.
+     *
+     * <p>Never throws: a daemon that cannot start a lead must still serve. herdr being unreachable,
+     * a profile that does not exist, a failed {@code agent.start} — each is logged and skipped, and
+     * the remaining leads are still attempted.
+     */
+    public int ensureLeads() {
+        Map<String, BridgedConfig.Leader> leaders = cfg.fleet().leaders();
+        if (leaders.isEmpty()) {
+            return 0;
+        }
+
+        Map<String, Integer> live;
+        try {
+            live = liveLeads(leaders);
+        } catch (HerdrException e) {
+            // Counting is the whole safety mechanism against double-spawning. If we cannot count, we
+            // must not guess — spawning a second orchestrator is worse than starting none.
+            log.warn("lead auto-launch skipped — cannot tell which leads are live: {}", e.getMessage());
+            return 0;
+        }
+
+        int started = 0;
+        for (Map.Entry<String, BridgedConfig.Leader> e : leaders.entrySet()) {
+            String name = e.getKey();
+            BridgedConfig.Leader lead = e.getValue();
+            int running = live.getOrDefault(name, 0);
+            int wanted = lead.instances();
+
+            if (running >= wanted) {
+                log.info("lead '{}': {} live, {} wanted — nothing to start", name, running, wanted);
+                continue;
+            }
+            if (!lead.isCreatable()) {
+                // A lead with a `terminal:` pin and no `profile:` is recognise-only by design: the
+                // operator opens it by hand. Say so once rather than looking like a silent failure.
+                log.info("lead '{}' is not live, and names no profile — it can be recognised but not "
+                        + "launched. Add `profile:` under fleet.leaders.{} to have bridged start it.",
+                        name, name);
+                continue;
+            }
+
+            BridgedConfig.Profile profile = cfg.profiles().get(lead.profile());
+            if (profile == null) {
+                log.warn("lead '{}' names profile '{}', which is not configured — not launching",
+                        name, lead.profile());
+                continue;
+            }
+
+            for (int i = running; i < wanted; i++) {
+                if (launch(name, lead, profile)) {
+                    started++;
+                }
+            }
+        }
+        return started;
+    }
+
+    /**
+     * How many live leads exist per configured name.
+     *
+     * <p>Two independent pieces of evidence, because either alone double-spawns:
+     * <ul>
+     *   <li>a running agent in a tab labelled {@code "<tabPrefix> <name>"} — how an auto-launched
+     *       lead, or an operator following the labelling convention, is found;</li>
+     *   <li>a running agent on a terminal the config pins in {@code fleet.leaders.<name>.terminal} —
+     *       how a lead the operator opened and pinned by hand is found. Without this, a pinned lead
+     *       whose tab carries no matching label would be relaunched on every boot.</li>
+     * </ul>
+     * Member workspaces are excluded, exactly as the scanner excludes them: a member must not be
+     * counted as a lead because it happens to sit in a matching tab.
+     */
+    private Map<String, Integer> liveLeads(Map<String, BridgedConfig.Leader> leaders) {
+        Set<String> memberSpaces = cfg.profiles().values().stream()
+                .map(BridgedConfig.Profile::workspace)
+                .filter(w -> w != null && !w.isBlank())
+                .collect(Collectors.toSet());
+
+        // tabId → the lead name its label declares.
+        Map<String, String> nameByTab = new LinkedHashMap<>();
+        for (Workspace ws : spaces.listWorkspaces()) {
+            if (ws.workspaceId() == null || memberSpaces.contains(ws.label())) {
+                continue;
+            }
+            for (Tab tab : spaces.listTabs(ws.workspaceId())) {
+                String declared = leadNameOf(tab.label(), leaders);
+                if (declared != null && tab.tabId() != null) {
+                    nameByTab.put(tab.tabId(), declared);
+                }
+            }
+        }
+
+        // terminalId → the lead name the config pins it to.
+        Map<String, String> nameByPinnedTerminal = new LinkedHashMap<>();
+        leaders.forEach((name, lead) -> {
+            if (lead.terminal() != null && !lead.terminal().isBlank()) {
+                nameByPinnedTerminal.put(lead.terminal().strip(), name);
+            }
+        });
+
+        Map<String, Integer> counts = new LinkedHashMap<>();
+        for (Agent a : agents.list()) {
+            String name = nameByTab.get(a.tabId());
+            if (name == null) {
+                name = nameByPinnedTerminal.get(a.terminalId());
+            }
+            if (name != null) {
+                counts.merge(name, 1, Integer::sum);
+            }
+        }
+        return counts;
+    }
+
+    /**
+     * The configured lead a tab label names, or {@code null} for a label that names none.
+     *
+     * <p>Matched against the declared lead names rather than by splitting on the prefix, so an
+     * operator's {@code "lead: something-else"} tab is not mistaken for a configured lead.
+     */
+    private String leadNameOf(String label, Map<String, BridgedConfig.Leader> leaders) {
+        if (label == null) {
+            return null;
+        }
+        String l = label.strip();
+        for (Map.Entry<String, BridgedConfig.Leader> e : leaders.entrySet()) {
+            if (l.equalsIgnoreCase(e.getValue().tabLabel(e.getKey()).strip())) {
+                return e.getKey();
+            }
+        }
+        return null;
+    }
+
+    /** Start one lead. Returns false (having logged) rather than throwing on any failure. */
+    private boolean launch(String name, BridgedConfig.Leader lead, BridgedConfig.Profile profile) {
+        String label = lead.tabLabel(name);
+        String cwd = (lead.cwd() == null || lead.cwd().isBlank())
+                ? System.getProperty("user.dir") : lead.cwd();
+
+        Tab.Created tab = null;
+        try {
+            Workspace ws = spaces.ensureWorkspace(lead.workspace());
+            tab = spaces.createTab(ws.workspaceId(), cwd, leadEnv(profile));
+            if (tab.rootPaneId() == null) {
+                throw new IllegalStateException("tab " + tab.tab().tabId()
+                        + " came back with no seed pane — nowhere to start the lead");
+            }
+            // Same shape as the member launchers: herdr resolves the executable from `kind`, so
+            // argv[0] (the configured launcher, e.g. `ccs`) is dropped and only the rest is passed.
+            List<String> argv = leadArgv(profile);
+            Agent started = agents.start("lead-" + name, herdrKind(profile),
+                    argv.isEmpty() ? argv : argv.subList(1, argv.size()), tab.rootPaneId());
+
+            // Label AFTER the start succeeds. A label written before would survive a failed start
+            // and then read back as a live lead on the next boot, which is the exact staleness the
+            // agent-liveness check exists to prevent — no need to create the case ourselves.
+            spaces.renameTab(tab.tab().tabId(), label);
+
+            log.info("lead '{}' launched: profile={} tab={} pane={} terminal={} label='{}' cwd={}",
+                    name, profile.profile(), tab.tab().tabId(), started.paneId(),
+                    started.terminalId(), label, cwd);
+            return true;
+        } catch (RuntimeException e) {
+            log.warn("lead '{}' failed to launch on profile '{}': {}",
+                    name, profile.profile(), e.getMessage());
+            if (tab != null && tab.tab() != null && tab.tab().tabId() != null) {
+                try {
+                    spaces.closeTab(tab.tab().tabId());
+                } catch (RuntimeException cleanup) {
+                    log.warn("could not close the orphaned lead tab {}: {}",
+                            tab.tab().tabId(), cleanup.getMessage());
+                }
+            }
+            return false;
+        }
+    }
+
+    /**
+     * The herdr agent kind for this profile — the same value the matching member adapter passes, so
+     * herdr resolves the same executable for a lead as it does for a member on that backend.
+     */
+    private static String herdrKind(BridgedConfig.Profile profile) {
+        return profile.isOpenCode() ? "opencode" : "claude";
+    }
+
+    /**
+     * The lead's argv: the profile's own command, the model pin, and the bridge MCP mount.
+     *
+     * <p>No {@code --append-system-prompt}. That flag carries the worker reply charter, and a lead
+     * is not a worker — it reads its orchestration rules from the project's {@code CLAUDE.md} like
+     * any other primary. This is the single most important difference from the member launchers;
+     * do not "unify" it back.
+     */
+    private List<String> leadArgv(BridgedConfig.Profile profile) {
+        List<String> argv = new ArrayList<>(profile.argv());
+        if (profile.hasMcp()) {
+            argv.add("--mcp-config");
+            argv.add("{\"mcpServers\":{\"bridge\":{\"type\":\"http\",\"url\":\""
+                    + profile.mcpUrl() + "\"}}}");
+        }
+        // Appended last, for the same reason the member launcher does it (CB-533): the argv is
+        // usually a wrapper such as `ccs <profile>`, which exports its own model family over
+        // whatever it inherited, and --model outranks the environment.
+        if (profile.model() != null && !profile.model().isBlank()) {
+            argv.add("--model");
+            argv.add(profile.model());
+        }
+        return argv;
+    }
+
+    /**
+     * The lead's environment: the profile's {@code env:} block, and nothing that could move it off
+     * the subscription.
+     *
+     * <p>{@code ANTHROPIC_BASE_URL} and {@code ANTHROPIC_AUTH_TOKEN} are stripped unconditionally —
+     * not defaulted, not guarded, stripped. A lead runs on the operator's subscription by
+     * definition, so there is no configuration under which pointing it elsewhere is correct, and a
+     * profile that carries them (a member profile reused as a lead's backend) must not leak them in.
+     */
+    private Map<String, String> leadEnv(BridgedConfig.Profile profile) {
+        Map<String, String> out = new LinkedHashMap<>();
+        if (profile.env() != null) {
+            out.putAll(profile.env());
+        }
+        out.remove("ANTHROPIC_BASE_URL");
+        out.remove("ANTHROPIC_AUTH_TOKEN");
+        if (profile.configDir() != null && !profile.configDir().isBlank()) {
+            out.put("CLAUDE_CONFIG_DIR", profile.configDir());
+        }
+        // Deliberately no git token: a lead reviews and merges through the operator's own
+        // credentials, and never needs the scoped write:repository token a member is granted.
+        out.values().removeIf(Objects::isNull);
+        return out;
+    }
+}

bridged/src/main/java/dev/ltms/bridged/mcp/BridgeMcp.java

@@ -0,0 +1,970 @@
+package dev.ltms.bridged.mcp;
+
+import dev.ltms.bridged.auth.AuditLog;
+import dev.ltms.bridged.auth.Authz;
+import dev.ltms.bridged.auth.CallerResolver;
+import dev.ltms.bridged.auth.Principal;
+import dev.ltms.bridged.auth.Role;
+import dev.ltms.bridged.guard.GuardException;
+import dev.ltms.bridged.herdr.Agent;
+import dev.ltms.bridged.metrics.BridgedMetrics;
+import dev.ltms.bridged.metrics.Metrics;
+import dev.ltms.bridged.inject.MemberPresence;
+import dev.ltms.bridged.herdr.HerdrException;
+import dev.ltms.bridged.msg.MessageService;
+import dev.ltms.bridged.msg.Rendezvous;
+import dev.ltms.bridged.peer.PeerUnreachableException;
+import dev.ltms.bridged.session.SessionManager;
+import dev.ltms.bridged.session.MemberSession;
+import dev.ltms.bridged.session.WorktreeRequest;
+import dev.ltms.bridged.peer.MemberRole;
+import dev.ltms.bridged.peer.PeerLauncher;
+import io.modelcontextprotocol.common.McpTransportContext;
+import io.modelcontextprotocol.json.McpJsonMapper;
+import io.modelcontextprotocol.json.jackson3.JacksonMcpJsonMapperSupplier;
+import io.modelcontextprotocol.server.McpServer;
+import io.modelcontextprotocol.server.McpSyncServer;
+import io.modelcontextprotocol.server.McpSyncServerExchange;
+import io.modelcontextprotocol.server.transport.HttpServletStreamableServerTransportProvider;
+import io.modelcontextprotocol.spec.McpSchema;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import jakarta.servlet.http.HttpServlet;
+
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+/**
+ * The MCP SERVER face (CB-105): a Streamable-HTTP MCP server whose tools are <em>thin adapters</em>
+ * over the same {@link MessageService}/{@link Rendezvous} the REST routes use — so the two are
+ * validated by parity, not by re-implementing behaviour. The primary Opus calls {@code bridge_send}
+ * / {@code bridge_status}; the worker calls {@code bridge_reply}.
+ *
+ * <p>Beyond delegation the primary also manages the fleet here (CB-108): {@code bridge_spawn} /
+ * {@code bridge_list} / {@code bridge_stop} drive the {@link PeerLauncher} SPI so a worker's whole
+ * lifecycle is managed through MCP, with each adapter's subscription boundary enforced inside it.
+ *
+ * <p>The tool <em>logic</em> lives in package-private static methods returning a
+ * {@link McpSchema.CallToolResult}, so it is unit-testable without standing up the HTTP transport;
+ * the SDK owns the wire protocol. Mount {@link #servlet()} at {@code /mcp} on the daemon's Jetty.
+ */
+public final class BridgeMcp {
+
+    private static final long DEFAULT_TIMEOUT_MS = 25_000;
+    private static final long MAX_TIMEOUT_MS = 120_000;
+    // bridge_ask blocks the WORKER's own MCP call, which its client caps near 60s — default under
+    // that so the bridge returns a clean timeout before the client severs the call (CB-205).
+    private static final long ASK_DEFAULT_TIMEOUT_MS = 55_000;
+    private static final long ASK_MAX_TIMEOUT_MS = 115_000;
+    private static final ObjectMapper MAPPER = new ObjectMapper(); // worker-view JSON projections
+
+    /** Transport-context key under which the extractor stashes the resolved caller identity. */
+    static final String CALLER_TERMINAL = "callerTerminal";
+    /** Transport-context key under which the extractor stashes the caller's PID (for cwd inherit). */
+    static final String CALLER_PID = "callerPid";
+    /** Transport-context key under which the extractor stashes the resolved {@link Role} (CB-501). */
+    static final String CALLER_ROLE = "callerRole";
+    /** Transport-context key for the lead's configured name, when the caller is one (CB-530). */
+    static final String CALLER_NAME = "callerName";
+
+    private final HttpServletStreamableServerTransportProvider transport;
+    private final McpSyncServer server;
+    private final CallerResolver authz; // CB-501: null → authorization not enforced (legacy)
+    private final Metrics metrics;      // CB-502: null → auth failures not counted
+
+    /**
+     * Legacy constructor — no authorization. Retained so existing tests exercise tool behaviour
+     * without an auth fixture.
+     */
+    public BridgeMcp(MessageService messages, PeerLauncher workers,
+                     SessionManager sessions, ConnectionIdentity identity, MemberPresence presence,
+                     PrimaryRegistry primaryRegistry) {
+        this(messages, workers, sessions, identity, presence, primaryRegistry, null, null);
+    }
+
+    /**
+     * @param callers resolves each call's {@link Principal}; {@code null} disables authorization.
+     *                This surface needs its own enforcement: {@code /mcp} is a raw servlet on
+     *                Jetty's context handler and never passes through Javalin's {@code before}
+     *                filter, so the REST guard does not cover it.
+     * @param metrics registry for auth-failure counting; may be {@code null}
+     */
+    public BridgeMcp(MessageService messages, PeerLauncher workers,
+                     SessionManager sessions, ConnectionIdentity identity, MemberPresence presence,
+                     PrimaryRegistry primaryRegistry, CallerResolver callers, Metrics metrics) {
+        McpJsonMapper json = new JacksonMcpJsonMapperSupplier().get();
+        this.transport = HttpServletStreamableServerTransportProvider.builder()
+                .jsonMapper(json)
+                .mcpEndpoint("/mcp")
+                // Resolve the caller from the connection (peer PID → herdr pane) in one lookup: the
+                // worker terminal for bridge_reply (no spoofable arg), and the PID so bridge_spawn can
+                // inherit the primary's cwd (CB-112). Any contact from a worker marks it available
+                // (CB-113) — its MCP initialize is the reliable "the agent is up" signal.
+                .contextExtractor(req -> {
+                    // One resolution per call, shared with the REST surface via CallerResolver so
+                    // the two paths cannot drift on who a caller is.
+                    Principal p = callers != null
+                            ? callers.resolve(req.getRemoteAddr(), req.getRemotePort(),
+                                    req.getHeader("Authorization"))
+                            : legacyPrincipal(identity, req.getRemoteAddr(), req.getRemotePort());
+                    // CB-532: guard on the ROLE, not on the terminal being null. This excludes a
+                    // lead, which carries its pane too, while including every spawned member role.
+                    // Enrolling a lead would count it as an available member in the roster.
+                    markSpawnedMemberPresent(p, presence);
+                    return McpTransportContext.create(Map.of(
+                            CALLER_TERMINAL, orEmpty(p.terminal()),
+                            CALLER_PID, Long.toString(p.pid()),
+                            CALLER_ROLE, p.role().name(),
+                            CALLER_NAME, orEmpty(p.name())));
+                })
+                .build();
+        this.server = McpServer.sync(transport)
+                .serverInfo("bridge", "0.1.0")
+                .capabilities(McpSchema.ServerCapabilities.builder().tools(true).build())
+                .toolCall(sendTool(), (exchange, req) -> {
+                    McpSchema.CallToolResult denied = deny(exchange, Authz.Action.SEND,
+                            str(req.arguments(), "sessionId"));
+                    if (denied != null) return denied;
+                    String caller = callerTerminal(exchange);
+                    // CB-548: only a PRIMARY caller may claim the legacy singleton "primary" fallback.
+                    // An architect delegates as its own pane but must never become the fallback that
+                    // no-delegation inbox nudges target as if it were the primary (the per-target
+                    // delegation map does not cure the singleton).
+                    recordPrimarySingleton(primaryRegistry, caller, principal(exchange));
+                    Map<String, Object> a = req.arguments();
+                    String target = str(a, "sessionId");
+                    String content = str(a, "content");
+                    String turnId = str(a, "turnId");
+                    if (turnId != null && !turnId.isBlank()) {
+                        // Answering a worker's bridge_ask (CB-205): resolve its blocked question and
+                        // block for the worker's reply as it resumes the same turn. This is the same
+                        // delegation, so ownership is left untouched (CB-548) — never re-recorded.
+                        return answer(messages, turnId, content, timeoutMs(a));
+                    }
+                    // CB-548: delegator ownership (which lead's reply nudge this worker routes to,
+                    // CB-532) is recorded only once the send is ACCEPTED — MessageService has won the
+                    // session lock and queued delivery — via the accepted-delivery callback, never at
+                    // request time. A concurrent sender that times out BUSY therefore cannot steal a
+                    // live turn's reply routing without ever owning the turn.
+                    Runnable onAccepted = () -> primaryRegistry.recordDelegation(target, caller);
+                    // wait defaults to true (block for the reply); wait:false is fire-and-poll.
+                    return Boolean.FALSE.equals(a.get("wait"))
+                            ? sendAsync(messages, target, content, onAccepted)
+                            : send(messages, target, content, timeoutMs(a), onAccepted);
+                })
+                // bridge_reply's identity is the CONNECTION, never an argument — so the authz check
+                // is "is this caller a worker at all", and it can only ever reply as itself.
+                .toolCall(replyTool(), (exchange, req) -> {
+                    String self = callerTerminal(exchange);
+                    McpSchema.CallToolResult denied = deny(exchange, Authz.Action.REPLY, self);
+                    if (denied != null) return denied;
+                    return reply(messages, self, str(req.arguments(), "content"));
+                })
+                // bridge_ask (CB-205): a worker's mid-turn question — identity from the CONNECTION.
+                .toolCall(askTool(), (exchange, req) -> {
+                    String self = callerTerminal(exchange);
+                    McpSchema.CallToolResult denied = deny(exchange, Authz.Action.ASK, self);
+                    if (denied != null) return denied;
+                    return ask(messages, self, str(req.arguments(), "question"), timeoutMs(req.arguments()));
+                })
+                .toolCall(statusTool(), (exchange, req) -> {
+                    McpSchema.CallToolResult denied = deny(exchange, Authz.Action.READ, null);
+                    if (denied != null) return denied;
+                    return status(messages, str(req.arguments(), "sessionId"));
+                })
+                .toolCall(pollTool(), (exchange, req) -> {
+                    McpSchema.CallToolResult denied = deny(exchange, Authz.Action.READ, null);
+                    if (denied != null) return denied;
+                    Map<String, Object> a = req.arguments();
+                    return poll(messages, str(a, "ticket"), str(a, "target"));
+                })
+                // CB-307 Increment 3: per-msgId ack (not needed in v1 but supported by the inbox).
+                // Acking removes a reply from the inbox, so it is a drain, not a read.
+                .toolCall(ackTool(), (exchange, req) -> {
+                    Map<String, Object> a = req.arguments();
+                    McpSchema.CallToolResult denied = deny(exchange, Authz.Action.DRAIN, str(a, "target"));
+                    if (denied != null) return denied;
+                    return ack(messages, str(a, "target"), str(a, "msgId"));
+                })
+                // Fleet management (CB-108): spawn/list/stop over ClaudeCodeLauncher.
+                .toolCall(spawnTool(), (exchange, req) -> {
+                    McpSchema.CallToolResult denied = deny(exchange, Authz.Action.SPAWN, null);
+                    if (denied != null) return denied;
+                    String caller = callerTerminal(exchange);
+                    // SPAWN is already auth-gated to PRIMARY (architects can never call it), but
+                    // enforce the same invariant here: only a PRIMARY may claim the legacy singleton.
+                    recordPrimarySingleton(primaryRegistry, caller, principal(exchange));
+                    Map<String, Object> a = req.arguments();
+                    // CB-112: worker inherits the primary's cwd unless the call pins one.
+                    // CB-301: carry the caller's identity as the session owner (null for the primary).
+                    // CB-301-ext: optional isolated worktree for parallel implementers.
+                    String callerCwd = identity.cwdForPid(callerPid(exchange));
+                    return spawn(sessions, str(a, "profile"), str(a, "role"), str(a, "cwd"), callerCwd,
+                            callerTerminal(exchange), worktreeRequest(a));
+                })
+                .toolCall(listTool(), (exchange, _) -> {
+                    McpSchema.CallToolResult denied = deny(exchange, Authz.Action.READ, null);
+                    if (denied != null) return denied;
+                    return listFleet(workers, sessions,
+                            callers == null ? Map.of() : callers.leads(),
+                            callerTerminal(exchange));
+                })
+                .toolCall(stopTool(), (exchange, req) -> {
+                    String paneId = str(req.arguments(), "paneId");
+                    McpSchema.CallToolResult denied = deny(exchange, Authz.Action.STOP, paneId);
+                    if (denied != null) return denied;
+                    return stop(sessions, paneId);
+                })
+                .toolCall(profilesTool(), (exchange, _) -> {
+                    McpSchema.CallToolResult denied = deny(exchange, Authz.Action.READ, null);
+                    if (denied != null) return denied;
+                    return profiles(workers);
+                })
+                .toolCall(whoamiTool(), (exchange, _) -> {
+                    McpSchema.CallToolResult denied = deny(exchange, Authz.Action.READ, null);
+                    if (denied != null) return denied;
+                    return whoami(principal(exchange), sessions);
+                })
+                .build();
+        this.authz = callers;
+        this.metrics = metrics;
+    }
+
+    /**
+     * Pre-CB-501 identity: worker if the connection maps to a pane, otherwise the primary. Used
+     * only by the legacy constructor, where authorization is not enforced anyway.
+     */
+    private static Principal legacyPrincipal(ConnectionIdentity identity, String addr, int port) {
+        ConnectionIdentity.Caller c = identity.resolve(addr, port);
+        return c.terminal() != null
+                ? Principal.worker(c.terminal(), c.pid())
+                : Principal.primary(c.pid());
+    }
+
+    /** The caller reconstructed from the transport context. */
+    private static Principal principal(McpSyncServerExchange exchange) {
+        return principalFrom(exchange.transportContext().get(CALLER_ROLE),
+                callerTerminal(exchange), callerPid(exchange), callerName(exchange));
+    }
+
+    /**
+     * Rebuild a {@link Principal} from the three values the context extractor stashed.
+     *
+     * <p>Split out from {@link #principal(McpSyncServerExchange)} so the identity rules are
+     * reachable without an {@code McpSyncServerExchange} — that is an SDK type this project has no
+     * mocking library to fabricate, which is why this logic had no test at all until CB-513.
+     *
+     * @param role     the stashed {@link Role} name, or {@code null} on the legacy path
+     * @param terminal the worker terminal, or {@code null} for a non-worker
+     * @param pid      the calling pid, or {@code -1}
+     */
+    static Principal principalFrom(Object role, String terminal, long pid) {
+        return principalFrom(role, terminal, pid, null);
+    }
+
+    /** As {@link #principalFrom(Object, String, long)}, carrying a lead's name (CB-530). */
+    static Principal principalFrom(Object role, String terminal, long pid, String name) {
+        if (role == null) {
+            // No role stashed (legacy path): fall back to the historical interpretation.
+            return terminal != null ? Principal.worker(terminal, pid) : Principal.primary(pid);
+        }
+        return new Principal(Role.valueOf(role.toString()), terminal, pid, name);
+    }
+
+    /**
+     * Gate a tool call on the CB-505 table. Returns {@code null} when the call may proceed, or the
+     * error result to return when it may not.
+     */
+    private McpSchema.CallToolResult deny(McpSyncServerExchange exchange, Authz.Action action,
+                                          String target) {
+        return denyFor(principal(exchange), action, target);
+    }
+
+    /**
+     * The policy half of {@link #deny}: everything except pulling the caller out of the MCP
+     * exchange. Kept separate so the authorization decision — the actual control — is unit-testable
+     * without fabricating an SDK {@code McpSyncServerExchange}.
+     *
+     * <p>This surface exists because the enforcement was previously unreachable from a test: no
+     * test constructs a {@code BridgeMcp}, so the whole MCP-side gate ran zero times in the suite
+     * while the REST-side equivalent had ten tests. A security control nothing exercises is a
+     * claim, not a control.
+     *
+     * @return {@code null} when the call may proceed, or the error result to return when it may not
+     */
+    McpSchema.CallToolResult denyFor(Principal caller, Authz.Action action, String target) {
+        // The enforcement switch lives HERE rather than in the exchange-facing wrapper: any future
+        // tool that calls this directly must not be able to skip the gate by accident.
+        if (authz == null) {
+            return null; // legacy constructor: authorization not enforced
+        }
+        if (Authz.permits(caller, action, target)) {
+            if (action != Authz.Action.READ) {
+                AuditLog.allowed(caller, action, target); // reads would drown the trail
+            }
+            return null;
+        }
+        String reason = Authz.isUnauthenticated(caller) ? "unauthenticated" : "forbidden";
+        AuditLog.denied(caller, action, target, reason);
+        if (metrics != null) {
+            metrics.inc(BridgedMetrics.AUTH_FAILURES, "reason", reason);
+        }
+        return error(reason + ": " + caller.describe() + " may not " + action);
+    }
+
+    /**
+     * Update the legacy singleton "primary" fallback used for no-delegation inbox nudges (CB-548).
+     *
+     * <p>Only {@link Role#PRIMARY} callers — the unnamed primary and named leads alike — may claim
+     * it. An architect delegates as its own pane but must never become the fallback: the per-target
+     * delegation map ({@code PrimaryRegistry#recordDelegation}) does not cure the singleton, so an
+     * architect left here would draw nudges that belong to a primary. The decision uses the resolved
+     * role, never name/kind sniffing. A null {@code caller} (legacy/no-auth path) records nothing.
+     *
+     * <p>Split out of the tool handlers so the guard is unit-testable without fabricating an SDK
+     * {@code McpSyncServerExchange} (same pattern as {@link #denyFor}/{@link #principalFrom}).
+     */
+    static void recordPrimarySingleton(PrimaryRegistry registry, String callerTerminal, Principal caller) {
+        if (caller != null && caller.isPrimary()) {
+            registry.record(callerTerminal);
+        }
+    }
+
+    /** The worker identity resolved from this call's connection, or {@code null} if the primary. */
+    private static String callerTerminal(McpSyncServerExchange exchange) {
+        Object v = exchange.transportContext().get(CALLER_TERMINAL);
+        String s = v == null ? null : v.toString();
+        return (s == null || s.isBlank()) ? null : s;
+    }
+
+    /** The lead name resolved from this call's connection, or {@code null} (CB-530). */
+    private static String callerName(McpSyncServerExchange exchange) {
+        Object v = exchange.transportContext().get(CALLER_NAME);
+        String s = v == null ? null : v.toString();
+        return (s == null || s.isBlank()) ? null : s;
+    }
+
+    /** The caller's PID resolved from this call's connection, or {@code -1} if unknown. */
+    private static long callerPid(McpSyncServerExchange exchange) {
+        Object v = exchange.transportContext().get(CALLER_PID);
+        try {
+            return v == null ? -1 : Long.parseLong(v.toString());
+        } catch (NumberFormatException e) {
+            return -1;
+        }
+    }
+
+    private static String orEmpty(String s) {
+        return s == null ? "" : s;
+    }
+
+    /** The Streamable-HTTP servlet to mount at {@code /mcp} on the daemon's Jetty. */
+    public HttpServlet servlet() {
+        return transport;
+    }
+
+    /** Mark a connected spawned member available for the injector readiness gate. */
+    static void markSpawnedMemberPresent(Principal caller, MemberPresence presence) {
+        if (caller.isSpawnedMember()) {
+            presence.markPresent(caller.terminal());
+        }
+    }
+
+    /** Graceful shutdown of the MCP server. */
+    public void close() {
+        server.closeGracefully();
+    }
+
+    // --- tool logic (thin adapters over the services; unit-testable) ---------------------------
+
+    /** {@code bridge_send}: delegate {@code content} to a worker session and block for its reply. */
+    static McpSchema.CallToolResult send(MessageService messages, String sessionId, String content, Long timeoutMs) {
+        return send(messages, sessionId, content, timeoutMs, null);
+    }
+
+    /**
+     * As {@link #send(MessageService, String, String, Long)}, wiring an accepted-delivery hook
+     * (CB-548): {@code onAccepted} records delegator ownership the instant the send is accepted, so
+     * a BUSY interloper never claims a turn it did not win. {@code null} disables recording.
+     */
+    static McpSchema.CallToolResult send(MessageService messages, String sessionId, String content,
+                                         Long timeoutMs, Runnable onAccepted) {
+        if (isBlank(sessionId) || isBlank(content)) {
+            return error("sessionId and content are required");
+        }
+        long timeout = clamp(timeoutMs == null ? DEFAULT_TIMEOUT_MS : timeoutMs);
+        try {
+            return formatReply(messages.send(sessionId, content, timeout, onAccepted), timeout);
+        } catch (HerdrException e) {
+            return error("herdr error contacting session " + sessionId + ": " + e.getMessage());
+        }
+    }
+
+    /**
+     * {@code bridge_send} carrying a {@code turnId}: the primary's answer to a worker's
+     * {@code bridge_ask} (CB-205). Resolves the worker's blocked question and blocks for its reply as
+     * it resumes the same turn — surfaced to the primary identically to a normal send.
+     */
+    static McpSchema.CallToolResult answer(MessageService messages, String turnId, String content, Long timeoutMs) {
+        if (isBlank(turnId) || isBlank(content)) {
+            return error("turnId and content are required to answer a worker's question");
+        }
+        long timeout = clamp(timeoutMs == null ? DEFAULT_TIMEOUT_MS : timeoutMs);
+        return formatReply(messages.answer(turnId, content, timeout), timeout);
+    }
+
+    /**
+     * {@code bridge_ask} (CB-205): a worker pauses its delegated turn to ask the primary, blocking
+     * until the primary answers. The worker is identified by its connection ({@code callerTerminal}),
+     * never an argument — a {@code null} means the caller is not a known worker.
+     */
+    static McpSchema.CallToolResult ask(MessageService messages, String callerTerminal, String question, Long timeoutMs) {
+        if (callerTerminal == null) {
+            return error("bridge_ask is for workers only — could not identify the calling worker "
+                    + "from the connection");
+        }
+        if (isBlank(question)) {
+            return error("question is required");
+        }
+        long timeout = Math.clamp(timeoutMs == null ? ASK_DEFAULT_TIMEOUT_MS : timeoutMs, 1, ASK_MAX_TIMEOUT_MS);
+        MessageService.AskResult r = messages.ask(callerTerminal, question, timeout);
+        return switch (r.outcome()) {
+            case ANSWERED -> text(r.answer());
+            case NO_WAITER -> error("no primary is awaiting this turn — bridge_ask only works while a "
+                    + "bridge_send delegation is open to answer it");
+            case TIMED_OUT -> text("[no answer within " + timeout + "ms — the primary did not respond; "
+                    + "proceed on your best judgement, then call bridge_reply to end the turn]");
+        };
+    }
+
+    /** Render a {@link MessageService.Reply} as a tool result — shared by {@link #send} and {@link #answer}. */
+    private static McpSchema.CallToolResult formatReply(MessageService.Reply r, long timeout) {
+        return switch (r.outcome()) {
+            case REPLIED -> text(r.text());
+            // The worker's turn finished but it never called bridge_reply — hand back the scraped
+            // transcript tail, flagged so the primary knows it isn't a structured reply.
+            case COMPLETED_UNREPLIED -> text(
+                    "[worker finished without a structured bridge_reply — transcript tail follows]\n" + r.text());
+            // The worker ran the turn then wedged (CB-109) — surface the error context.
+            case WORKER_FAILED -> text("[worker failed — turn ended in an unrecoverable state]\n" + r.text());
+            // The worker paused mid-turn to ask (CB-205) — tell the primary how to answer in-turn.
+            case QUESTION -> text("[question] the worker paused to ask before it can finish:\n" + r.text()
+                    + "\n\nAnswer it by calling bridge_send again with turnId=\"" + r.turnId()
+                    + "\" and content set to your answer; the worker resumes the same turn.");
+            case STALE_TURN -> error("that question is no longer open — it timed out or was already "
+                    + "answered (turnId stale)");
+            case TIMED_OUT_WORKING, TIMED_OUT_QUEUED, BUSY -> text("[no reply within " + timeout + "ms — worker "
+                    + r.outcome().name().toLowerCase().replace("timed_out_", "") + "; retry or poll status]");
+        };
+    }
+
+    /**
+     * {@code bridge_send} with {@code wait:false}: delegate {@code content} and return a ticket
+     * immediately (fire-and-poll), so a long task isn't cut off by the caller's MCP call timeout.
+     */
+    static McpSchema.CallToolResult sendAsync(MessageService messages, String sessionId, String content) {
+        return sendAsync(messages, sessionId, content, null);
+    }
+
+    /**
+     * As {@link #sendAsync(MessageService, String, String)}, wiring the accepted-delivery hook
+     * (CB-548) so an async flooding send records delegator ownership exactly once it is accepted.
+     */
+    static McpSchema.CallToolResult sendAsync(MessageService messages, String sessionId, String content,
+                                              Runnable onAccepted) {
+        if (isBlank(sessionId) || isBlank(content)) {
+            return error("sessionId and content are required");
+        }
+        String ticket = messages.sendAsync(sessionId, content, onAccepted);
+        return text("accepted — task delegated. Poll bridge_poll with ticket=" + ticket);
+    }
+
+    /** {@code bridge_poll}: check an async delegation by ticket, or drain a worker's inbox by target. */
+    static McpSchema.CallToolResult poll(MessageService messages, String ticket, String target) {
+        if (!isBlank(target)) {
+            var replies = messages.drainReplies(target);
+            if (replies.isEmpty()) {
+                return text("[]");
+            }
+            return text(json(replies));
+        }
+        if (isBlank(ticket)) {
+            return error("ticket (or target) is required");
+        }
+        MessageService.TaskView v = messages.poll(ticket);
+        if (v == null) {
+            return error("unknown ticket: " + ticket + " (never issued, or expired)");
+        }
+        return switch (v.phase()) {
+            case DONE -> text(v.replySource() != null && v.replySource().equals("transcript")
+                    ? "[done — worker finished without a structured bridge_reply; transcript tail follows]\n" + v.reply()
+                    : v.reply());
+            case PENDING -> text("[pending — " + v.detail() + "]");
+            case FAILED -> text("[failed — " + v.detail() + "]");
+        };
+    }
+
+    /**
+     * {@code bridge_reply}: the worker returns its structured answer, resolving the awaiting send
+     * or — when no send is open — queueing the reply in the inbox for later drain (CB-307).
+     * {@code callerTerminal} is resolved from the connection (never an argument); a {@code null}
+     * means the caller is not a known worker (e.g. the primary called it by mistake).
+     */
+    static McpSchema.CallToolResult reply(MessageService messages, String callerTerminal, String content) {
+        if (callerTerminal == null) {
+            return error("bridge_reply is for workers only — could not identify the calling worker "
+                    + "from the connection");
+        }
+        if (content == null) {
+            return error("content is required");
+        }
+        messages.reply(callerTerminal, content);
+        return text("delivered");
+    }
+
+    /** {@code bridge_ack}: acknowledge (remove) a specific reply from the inbox. */
+    static McpSchema.CallToolResult ack(MessageService messages, String target, String msgId) {
+        if (isBlank(target) || isBlank(msgId)) {
+            return error("target and msgId are required");
+        }
+        messages.ackReply(target, msgId);
+        return text("acknowledged " + msgId);
+    }
+
+    /** {@code bridge_status}: the live lifecycle status of a worker session. */
+    static McpSchema.CallToolResult status(MessageService messages, String sessionId) {
+        if (isBlank(sessionId)) {
+            return error("sessionId is required");
+        }
+        try {
+            return text(messages.status(sessionId).name().toLowerCase());
+        } catch (HerdrException e) {
+            return error("herdr error for session " + sessionId + ": " + e.getMessage());
+        }
+    }
+
+    /**
+     * {@code bridge_whoami}: the caller's own identity, as the daemon already resolved it.
+     *
+     * <p>Every other tool <em>consumes</em> this identity — the authorization gate, the reply
+     * rendezvous, the cwd inherit — but none reported it, so an agent had to infer its own role
+     * from side channels the daemon does not control: a charter string in its system prompt, the
+     * name its MCP mount happens to carry, or {@code ANTHROPIC_BASE_URL} (which Claude-model
+     * workers do not set). The failure mode of guessing is asymmetric and silent: a primary that
+     * mistakes itself for a worker is refused by {@link Authz} and learns immediately, while a
+     * worker that mistakes itself for the primary ends its turn without {@code bridge_reply} and
+     * the sender simply receives nothing. This tool removes the guess.
+     *
+     * <p>For a worker the session registry adds what it knows about that session. A worker the
+     * registry has no record of — one that outlived a daemon restart — still gets its role and
+     * {@code sessionId}, which is the load-bearing part.
+     */
+    static McpSchema.CallToolResult whoami(Principal caller, SessionManager sessions) {
+        Map<String, Object> m = new LinkedHashMap<>();
+        m.put("role", caller.role().name().toLowerCase());
+        if (caller.isArchitect()) {
+            // CB-548: the role reads "architect"; the name is the gateway-local slot the pane is
+            // bound to, and the pane itself so a peer knows where to reach it.
+            if (caller.name() != null) {
+                m.put("architect", caller.name());
+            }
+            if (caller.terminal() != null) {
+                m.put("sessionId", caller.terminal());
+            }
+            return text(json(m));
+        }
+        if (!caller.isWorker()) {
+            // CB-530: which lead, once more than one pane is configured as one. `role` deliberately
+            // still reads "primary" — the fallback ladder in CLAUDE.md keys on it, and a lead IS a
+            // primary for authorization; the name is additive so no existing reader breaks.
+            if (caller.name() != null) {
+                m.put("leader", caller.name());
+            }
+            // CB-532: a lead's own pane, so it can tell a peer where to reach it — and so an
+            // operator can read off which tab hosts which lead without going to herdr.
+            if (caller.terminal() != null) {
+                m.put("sessionId", caller.terminal());
+            }
+            return text(json(m));
+        }
+        m.put("sessionId", caller.terminal());
+        sessions.roster().stream()
+                .filter(s -> caller.terminal().equals(s.terminalId()))
+                .findFirst()
+                .ifPresent(s -> {
+                    m.put("paneId", s.paneId());
+                    m.put("profile", s.profile());
+                    m.put("state", s.state().name().toLowerCase());
+                    if (s.worktree() != null) {
+                        m.put("worktree", s.worktree());
+                    }
+                    if (s.branch() != null) {
+                        m.put("branch", s.branch());
+                    }
+                    if (s.ownerTerminal() != null) {
+                        m.put("owner", s.ownerTerminal());
+                    }
+                });
+        return text(json(m));
+    }
+
+    // --- fleet management logic (CB-108 / CB-301) --------------------------------------------
+
+    /** {@code bridge_spawn} without cwd/caller context (default resolution). */
+    static McpSchema.CallToolResult spawn(SessionManager sessions, String profile) {
+        return spawn(sessions, profile, null, null, null, null, null);
+    }
+
+    /**
+     * {@code bridge_spawn}: launch a guard-checked member for {@code profile} (blank → the default
+     * profile) under {@code role} (blank → {@code dev}), and return its session id + pane id. The
+     * member's cwd is {@code requestedCwd} if given, else the profile's config, else
+     * {@code callerCwd} (the primary's directory), else the daemon's.
+     * CB-301: the session is registered with {@code ownerTerminal} as its owner.
+     * CB-301-ext: {@code worktreeRequest} non-null provisions an isolated git worktree.
+     *
+     * <p>{@code role} and {@code profile} are independent: the role picks the contract, the profile
+     * picks the backend. A reviewer on the same profile as the dev it reviews is a normal spawn.
+     */
+    static McpSchema.CallToolResult spawn(SessionManager sessions, String profile, String role,
+                                          String requestedCwd, String callerCwd,
+                                          String ownerTerminal, WorktreeRequest worktreeRequest) {
+        MemberRole memberRole;
+        try {
+            memberRole = isBlank(role) ? MemberRole.DEV : MemberRole.parse(role);
+        } catch (IllegalArgumentException e) {
+            return error(e.getMessage());
+        }
+        try {
+            MemberSession member = sessions.acquire(isBlank(profile) ? null : profile, memberRole,
+                    requestedCwd, callerCwd, ownerTerminal, worktreeRequest);
+            return text(json(memberView(member)));
+        } catch (GuardException e) {
+            return error("subscription boundary: " + e.getMessage());
+        } catch (IllegalArgumentException e) {
+            return error(e.getMessage()); // unknown / no-default profile
+        } catch (PeerUnreachableException e) {
+            return error("spawn timed out — worker pane never reached injectable state: " + e.getMessage());
+        } catch (HerdrException e) {
+            return error("herdr error spawning worker: " + e.getMessage());
+        }
+    }
+
+    /** Build a {@link WorktreeRequest} from {@code bridge_spawn}'s optional {@code worktree}/{@code ticket} args. */
+    private static WorktreeRequest worktreeRequest(Map<String, Object> a) {
+        Object w = a.get("worktree");
+        if (w == null || Boolean.FALSE.equals(w)) {
+            return null;
+        }
+        String ticket = str(a, "ticket");
+        if (w instanceof String s) {
+            if (s.isBlank() || "false".equalsIgnoreCase(s)) {
+                return null;
+            }
+            if ("true".equalsIgnoreCase(s)) {
+                if (isBlank(ticket)) {
+                    throw new IllegalArgumentException("worktree=true requires a ticket slug");
+                }
+                return new WorktreeRequest(ticket, null);
+            }
+            return new WorktreeRequest(s, null);
+        }
+        if (w instanceof Boolean b && b) {
+            if (isBlank(ticket)) {
+                throw new IllegalArgumentException("worktree=true requires a ticket slug");
+            }
+            return new WorktreeRequest(ticket, null);
+        }
+        return null;
+    }
+
+    /** {@code bridge_profiles}: the configured worker profiles and the default. */
+    static McpSchema.CallToolResult profiles(PeerLauncher workers) {
+        return text(json(Map.of(
+                "profiles", workers.profiles(),
+                "default", workers.defaultProfile() == null ? "" : workers.defaultProfile())));
+    }
+
+    /**
+     * {@code bridge_list}: the whole fleet — {@code leads} and {@code workers} — each merged with
+     * live herdr status. CB-519 decoupled the registry key (a host-unique id) from the herdr pane
+     * coordinate, so the join is on the terminal id, which both the session and the live agent carry.
+     *
+     * <p>CB-535 added the {@code leads} half. Until then this listed the worker roster alone, and a
+     * lead asking "who else is here?" got an empty array — which reads as <em>no peers</em> but
+     * actually means <em>no workers spawned</em>. There was no way at all for a lead to learn a
+     * peer's address; it had to be carried across by a human. Both halves are reported even when a
+     * half is empty, so an empty {@code workers} can no longer be mistaken for an empty fleet.
+     *
+     * <p>Leads are drawn from the resolver rather than from a second registry, so an address listed
+     * here is one that would actually resolve as a lead — see {@link CallerResolver#leads()}. The
+     * caller's own row is flagged {@code "self": true}: a peer needs to tell its own pane apart from
+     * a peer's, and the alternative is every lead calling {@code bridge_whoami} to subtract itself.
+     *
+     * @param leads    terminal_id → lead name, live from the resolver
+     * @param selfTerm the calling pane's terminal id, or blank for a caller with no pane
+     */
+    static McpSchema.CallToolResult listFleet(PeerLauncher workers, SessionManager sessions,
+                                              Map<String, String> leads, String selfTerm) {
+        try {
+            Map<String, Agent> live = workers.list().stream()
+                    .map(Agent.class::cast)
+                    .filter(a -> a.terminalId() != null)
+                    .collect(Collectors.toMap(Agent::terminalId, Function.identity(), (_, b) -> b));
+            List<Map<String, Object>> leadRows = leads.entrySet().stream()
+                    .sorted(Map.Entry.comparingByValue())
+                    .map(e -> leadView(e.getKey(), e.getValue(), live.get(e.getKey()), selfTerm))
+                    .toList();
+            List<Map<String, Object>> out = sessions.roster().stream()
+                    .map(s -> SessionManager.rosterView(s, live.get(s.terminalId())))
+                    .toList();
+            return text(json(Map.of("leads", leadRows, "members", out)));
+        } catch (HerdrException e) {
+            return error("herdr error listing the fleet: " + e.getMessage());
+        }
+    }
+
+    /**
+     * One lead's row: its address, its name, and whether it can be reached right now.
+     *
+     * <p>{@code status} is herdr's live view, and {@code unknown} when herdr is not tracking that
+     * pane as an agent — the honest answer, and the one that matters: a lead whose pane herdr cannot
+     * see is a lead a {@code bridge_send} cannot be typed into. It is reported rather than hidden,
+     * because a peer that has gone unreachable is exactly what the sender needs to know.
+     */
+    private static Map<String, Object> leadView(String terminal, String name, Agent live,
+                                                String selfTerm) {
+        Map<String, Object> m = new LinkedHashMap<>();
+        m.put("sessionId", terminal);
+        m.put("name", name);
+        m.put("status", live == null || live.status() == null
+                ? "unknown" : live.status().name().toLowerCase());
+        if (terminal.equals(selfTerm)) {
+            m.put("self", true);
+        }
+        return m;
+    }
+
+    /** {@code bridge_stop}: tear a worker down by its pane id. */
+    static McpSchema.CallToolResult stop(SessionManager sessions, String paneId) {
+        if (isBlank(paneId)) {
+            return error("paneId is required");
+        }
+        try {
+            sessions.release(paneId);
+            return text("stopped " + paneId);
+        } catch (HerdrException e) {
+            return error("herdr error stopping " + paneId + ": " + e.getMessage());
+        }
+    }
+
+    /** CB-301 projection from the authoritative session registry. */
+    private static Map<String, Object> memberView(MemberSession s) {
+        Map<String, Object> m = new LinkedHashMap<>();
+        m.put("sessionId", s.terminalId());
+        m.put("paneId", s.paneId());
+        // Echo the role back so the caller can see what it actually got, not what it meant to ask
+        // for — a spawn that silently fell back to dev is otherwise invisible.
+        m.put("role", s.role() == null ? "dev" : s.role().wireName());
+        m.put("profile", s.profile());
+        m.put("status", s.state().name().toLowerCase());
+        if (s.worktree() != null) {
+            m.put("worktree", s.worktree());
+        }
+        if (s.branch() != null) {
+            m.put("branch", s.branch());
+        }
+        return m;
+    }
+
+    private static String json(Object o) {
+        try {
+            return MAPPER.writeValueAsString(o);
+        } catch (Exception e) {
+            return String.valueOf(o);
+        }
+    }
+
+    // --- tool schemas --------------------------------------------------------------------------
+
+    private static McpSchema.Tool sendTool() {
+        return tool("bridge_send",
+                "Delegate a task to a worker session. By default blocks until the worker replies and "
+                        + "returns its reply (or a 'still working / queued' note on timeout). Pass wait:false "
+                        + "for a long task to return a ticket immediately, then poll it with bridge_poll. To "
+                        + "answer a worker's bridge_ask, pass its turnId (with content) instead of sessionId.",
+                objectSchema(Map.of(
+                        "sessionId", stringProp("The worker session id (herdr terminal_id) to delegate to"),
+                        "content", stringProp("The task/message to send to the worker (or your answer, with turnId)"),
+                        "timeoutMs", Map.of("type", "integer", "description", "Max ms to wait for a reply (blocking mode)"),
+                        "wait", Map.of("type", "boolean",
+                                "description", "Block for the reply (default true); false returns a ticket to poll"),
+                        "turnId", stringProp("When answering a worker's bridge_ask, its question turnId — "
+                                + "routes your answer back into the same turn (omit for a normal delegation)")),
+                        List.of("content")));
+    }
+
+    private static McpSchema.Tool askTool() {
+        // No target/session arg — the worker's identity is resolved from the connection.
+        return tool("bridge_ask",
+                "Pause your current delegated turn to ask the primary a question, blocking until it "
+                        + "answers — then resume the same turn with the answer. Use this when only the "
+                        + "primary has a decision or detail you need to continue. You do not address the "
+                        + "primary; identity is resolved from your connection.",
+                objectSchema(Map.of(
+                        "question", stringProp("The question to put to the primary"),
+                        "timeoutMs", Map.of("type", "integer",
+                                "description", "Max ms to wait for the primary's answer")),
+                        List.of("question")));
+    }
+
+    private static McpSchema.Tool pollTool() {
+        return tool("bridge_poll",
+                "Check an async delegation (a bridge_send with wait:false) by its ticket: "
+                        + "pending, done (with the worker's reply), or failed. When target (a worker "
+                        + "session id) is present instead of ticket, drain that worker's inbox of "
+                        + "replies delivered when no send was open.",
+                objectSchema(Map.of(
+                        "ticket", stringProp("The ticket returned by bridge_send wait:false"),
+                        "target", stringProp("Worker session id to drain pending replies from (optional)")),
+                        List.of()));
+    }
+
+    private static McpSchema.Tool ackTool() {
+        return tool("bridge_ack",
+                "Acknowledge (remove) a specific reply from a worker's inbox. Use when the primary "
+                        + "has processed a reply and wants to confirm it, leaving other pending replies "
+                        + "in the inbox for later drain.",
+                objectSchema(Map.of(
+                        "target", stringProp("Worker session id whose inbox to ack from"),
+                        "msgId", stringProp("The message id to acknowledge")),
+                        List.of("target", "msgId")));
+    }
+
+    private static McpSchema.Tool spawnTool() {
+        return tool("bridge_spawn",
+                "Spawn a new off-subscription member session. A member has two independent attributes: "
+                        + "role (what it is for) and profile (which backend it runs on). Pass role to pick "
+                        + "the contract — 'dev' implements a unit and opens its own PR, 'reviewer' reviews a "
+                        + "diff it did not write, 'architect' refines a ticket before anyone builds it; omit "
+                        + "it for 'dev'. Pass profile (from bridge_profiles) to pick the backend, or omit it "
+                        + "for the default. The two are independent: a reviewer may run on the same profile "
+                        + "as the dev it reviews. The member opens your current directory by default; pass "
+                        + "cwd to pin a different one. Pass worktree:true (with ticket) or "
+                        + "worktree:<ticket-slug> to provision an isolated git worktree. Returns the member's "
+                        + "sessionId (use with bridge_send) and paneId (use with bridge_stop).",
+                objectSchema(Map.of(
+                        "role", stringProp("What the member is for: architect, dev or reviewer (default dev)"),
+                        "profile", stringProp("Which backend to run it on (omit for the default profile)"),
+                        "cwd", stringProp("Working directory for the member (omit to inherit yours)"),
+                        "worktree", Map.of("type", "string", "description", "'true' or a ticket slug — requests an isolated git worktree"),
+                        "ticket", stringProp("Ticket slug when worktree:true")),
+                        List.of()));
+    }
+
+    private static McpSchema.Tool profilesTool() {
+        return tool("bridge_profiles",
+                "List the configured worker profiles (backends) and which one bridge_spawn uses by default.",
+                objectSchema(Map.of(), List.of()));
+    }
+
+    private static McpSchema.Tool listTool() {
+        return tool("bridge_list",
+                "List the whole fleet the bridge tracks, in two parts. 'leads' are your PEERS — other "
+                        + "orchestrators, each with its sessionId (the address to bridge_send to), "
+                        + "name, live status, and 'self': true on your own row; this is how you "
+                        + "discover a peer lead without being told its address. 'members' are the "
+                        + "sessions delegated to — each with sessionId, paneId, role (architect/dev/"
+                        + "reviewer), profile (the backend it runs on), state, optional "
+                        + "worktree/branch/owner, and live herdr status. An empty 'members' "
+                        + "means no members are spawned; it says nothing about peers.",
+                objectSchema(Map.of(), List.of()));
+    }
+
+    private static McpSchema.Tool stopTool() {
+        return tool("bridge_stop",
+                "Tear down a worker session by its paneId (from bridge_spawn or bridge_list).",
+                objectSchema(Map.of(
+                        "paneId", stringProp("The worker's paneId to stop")),
+                        List.of("paneId")));
+    }
+
+    private static McpSchema.Tool replyTool() {
+        // No session/target arg — the caller's identity is resolved from the connection.
+        return tool("bridge_reply",
+                "Return your structured answer for a message you were sent, resolving the sender's "
+                        + "blocked bridge_send. A worker MUST end every delegated turn with exactly "
+                        + "one of these. A lead uses it only to answer another lead that messaged "
+                        + "it — never to answer a worker, whose turn it is not.",
+                objectSchema(Map.of(
+                        "content", stringProp("Your reply/answer")),
+                        List.of("content")));
+    }
+
+    private static McpSchema.Tool statusTool() {
+        return tool("bridge_status",
+                "Get the live lifecycle status (idle/working/blocked/unknown) of a worker session.",
+                objectSchema(Map.of(
+                        "sessionId", stringProp("The worker session id to query")),
+                        List.of("sessionId")));
+    }
+
+    private static McpSchema.Tool whoamiTool() {
+        return tool("bridge_whoami",
+                "Report who YOU are on the bridge — your role is resolved from your connection "
+                        + "(unforgeable), never from anything you claim. Returns role 'primary' (you "
+                        + "orchestrate: spawn/send/stop; reply ONLY to answer a peer lead that "
+                        + "messaged you, never to answer a worker), 'architect' (you delegate turns "
+                        + "and reply/ask as your own pane, but cannot spawn/stop/drain), or 'worker' "
+                        + "(you were delegated to: you must end every turn with exactly one "
+                        + "bridge_reply, and cannot spawn or send), plus 'leader'/'architect' naming "
+                        + "which one you are, your own sessionId, and profile/worktree/branch when "
+                        + "you are a worker. Call this first when following role-conditional "
+                        + "instructions rather than guessing.",
+                objectSchema(Map.of(), List.of()));
+    }
+
+    // --- small helpers -------------------------------------------------------------------------
+
+    // The SDK 2.0.0 deprecates its own Tool builders without a stable replacement — isolate it here.
+    @SuppressWarnings("deprecation")
+    private static McpSchema.Tool tool(String name, String description, Map<String, Object> inputSchema) {
+        return McpSchema.Tool.builder(name).description(description).inputSchema(inputSchema).build();
+    }
+
+    private static Map<String, Object> objectSchema(Map<String, Object> properties, List<String> required) {
+        return Map.of("type", "object", "properties", properties, "required", required);
+    }
+
+    private static Map<String, Object> stringProp(String description) {
+        return Map.of("type", "string", "description", description);
+    }
+
+    private static McpSchema.CallToolResult text(String s) {
+        return McpSchema.CallToolResult.builder().addTextContent(s == null ? "" : s).build();
+    }
+
+    private static McpSchema.CallToolResult error(String s) {
+        return McpSchema.CallToolResult.builder().addTextContent(s).isError(true).build();
+    }
+
+    private static String str(Map<String, Object> args, String key) {
+        Object v = args.get(key);
+        return v == null ? null : v.toString();
+    }
+
+    private static Long timeoutMs(Map<String, Object> args) {
+        Object v = args.get("timeoutMs");
+        return v instanceof Number n ? n.longValue() : null;
+    }
+
+    private static long clamp(long ms) {
+        return Math.clamp(ms, 1, MAX_TIMEOUT_MS);
+    }
+
+    private static boolean isBlank(String s) {
+        return s == null || s.isBlank();
+    }
+}

bridged/src/main/java/dev/ltms/bridged/mcp/ConnectionIdentity.java

@@ -0,0 +1,66 @@
+package dev.ltms.bridged.mcp;
+
+import dev.ltms.bridged.herdr.PaneLocator;
+
+/**
+ * Resolves <em>who is calling</em> an MCP tool from the connection alone — the anti-spoofing
+ * identity model of the MCP contract. It ties the connection's loopback peer PID (from the OS)
+ * to a herdr agent pane (from herdr), yielding the caller's worker {@code terminal_id}. A caller
+ * that maps to no worker pane — the primary, or an off-host client — resolves to {@code null}.
+ *
+ * <p>Both sources are authoritative and unforgeable: the OS reports the real connecting PID, and
+ * herdr owns the PID→pane mapping. A worker cannot claim to be another worker, nor the primary.
+ * Single-host only (the herd shares the {@code bridged} host); the token path is the split-host
+ * fallback.
+ */
+public final class ConnectionIdentity {
+
+    private final PaneLocator panes;
+    private final PeerPidLookup pids;
+    private final ProcessCwdLookup cwds;
+
+    /** Identity only (no cwd resolution — {@link #cwdForPid} returns {@code null}). */
+    public ConnectionIdentity(PaneLocator panes, PeerPidLookup pids) {
+        this(panes, pids, _ -> null);
+    }
+
+    /** Identity plus cwd resolution (CB-112 — inherit the primary's directory on spawn). */
+    public ConnectionIdentity(PaneLocator panes, PeerPidLookup pids, ProcessCwdLookup cwds) {
+        this.panes = panes;
+        this.pids = pids;
+        this.cwds = cwds;
+    }
+
+    /**
+     * The caller resolved from the connection: its worker {@code terminal} (or {@code null} for the
+     * primary / an off-host client) and its {@code pid} (or {@code -1} if not resolvable).
+     */
+    public record Caller(String terminal, long pid) {
+    }
+
+    /** Resolve the caller's terminal and PID from one peer-PID lookup. */
+    public Caller resolve(String remoteAddr, int remotePort) {
+        if (!isLoopback(remoteAddr)) {
+            return new Caller(null, -1); // only same-host callers can be workers
+        }
+        long pid = pids.pidForLocalPort(remotePort);
+        return new Caller(panes.terminalForPid(pid), pid);
+    }
+
+    /**
+     * The calling worker's {@code terminal_id}, or {@code null} if the caller is not a known
+     * on-host worker (treat as the primary).
+     */
+    public String callerTerminal(String remoteAddr, int remotePort) {
+        return resolve(remoteAddr, remotePort).terminal();
+    }
+
+    /** The working directory of {@code pid} (the primary's cwd on an MCP spawn), or {@code null}. */
+    public String cwdForPid(long pid) {
+        return pid > 0 ? cwds.cwdForPid(pid) : null;
+    }
+
+    private static boolean isLoopback(String addr) {
+        return "127.0.0.1".equals(addr) || "::1".equals(addr) || "0:0:0:0:0:0:0:1".equals(addr);
+    }
+}

bridged/src/main/java/dev/ltms/bridged/mcp/LsofPeerPidLookup.java

@@ -0,0 +1,58 @@
+package dev.ltms.bridged.mcp;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * {@link PeerPidLookup} via {@code lsof} (present on macOS and Linux). For a loopback TCP source
+ * {@code port}, both the client and this daemon appear on that port — so we exclude our own PID
+ * and take the other end, which is the calling process.
+ */
+public final class LsofPeerPidLookup implements PeerPidLookup {
+
+    private static final Logger log = LoggerFactory.getLogger(LsofPeerPidLookup.class);
+
+    private final long selfPid = ProcessHandle.current().pid();
+
+    @Override
+    public long pidForLocalPort(int port) {
+        try {
+            Process p = new ProcessBuilder("lsof", "-nP", "-FpP", "-iTCP:" + port)
+                    .redirectErrorStream(true).start();
+            long found = -1;
+            try (BufferedReader r = new BufferedReader(
+                    new InputStreamReader(p.getInputStream(), StandardCharsets.UTF_8))) {
+                long current = -1;
+                String line;
+                // -Fp emits records: a 'p<pid>' line, then the ports/files under that pid.
+                while ((line = r.readLine()) != null) {
+                    if (line.startsWith("p")) {
+                        current = parse(line.substring(1));
+                    } else if (current > 0 && current != selfPid) {
+                        found = current; // first process on this port that isn't us = the client
+                    }
+                }
+            }
+            if (!p.waitFor(2, TimeUnit.SECONDS)) {
+                p.destroyForcibly();
+            }
+            return found;
+        } catch (Exception e) {
+            log.debug("lsof peer-pid lookup for port {} failed: {}", port, e.getMessage());
+            return -1;
+        }
+    }
+
+    private static long parse(String s) {
+        try {
+            return Long.parseLong(s.trim());
+        } catch (NumberFormatException e) {
+            return -1;
+        }
+    }
+}

bridged/src/main/java/dev/ltms/bridged/mcp/LsofProcessCwdLookup.java

@@ -0,0 +1,48 @@
+package dev.ltms.bridged.mcp;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * {@link ProcessCwdLookup} via {@code lsof} (present on macOS and Linux): {@code lsof -a -p <pid>
+ * -d cwd -Fn} prints the process's cwd on the {@code n…} line. Used to inherit the primary's
+ * working directory for a spawned worker (CB-112).
+ */
+public final class LsofProcessCwdLookup implements ProcessCwdLookup {
+
+    private static final Logger log = LoggerFactory.getLogger(LsofProcessCwdLookup.class);
+
+    @Override
+    public String cwdForPid(long pid) {
+        if (pid <= 0) {
+            return null;
+        }
+        try {
+            Process p = new ProcessBuilder("lsof", "-a", "-p", Long.toString(pid), "-d", "cwd", "-Fn")
+                    .redirectErrorStream(true).start();
+            String cwd = null;
+            try (BufferedReader r = new BufferedReader(
+                    new InputStreamReader(p.getInputStream(), StandardCharsets.UTF_8))) {
+                String line;
+                while ((line = r.readLine()) != null) {
+                    if (line.startsWith("n")) { // 'n<path>' is the file-name field for the cwd fd
+                        cwd = line.substring(1);
+                        break;
+                    }
+                }
+            }
+            if (!p.waitFor(2, TimeUnit.SECONDS)) {
+                p.destroyForcibly();
+            }
+            return (cwd == null || cwd.isBlank()) ? null : cwd;
+        } catch (Exception e) {
+            log.debug("lsof cwd lookup for pid {} failed: {}", pid, e.getMessage());
+            return null;
+        }
+    }
+}

bridged/src/main/java/dev/ltms/bridged/mcp/PeerPidLookup.java

@@ -0,0 +1,13 @@
+package dev.ltms.bridged.mcp;
+
+/**
+ * Resolves the OS PID that owns a loopback TCP source port — the OS half of connection-based MCP
+ * identity. Java exposes no peer PID for a TCP socket, so this shells out. Injectable so
+ * {@link ConnectionIdentity} is testable without a real connection.
+ */
+@FunctionalInterface
+public interface PeerPidLookup {
+
+    /** The PID whose socket has local (source) {@code port} on loopback, or {@code -1} if unknown. */
+    long pidForLocalPort(int port);
+}

bridged/src/main/java/dev/ltms/bridged/mcp/PrimaryRegistry.java

@@ -0,0 +1,117 @@
+package dev.ltms.bridged.mcp;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicReference;
+
+/**
+ * Single-slot, thread-safe registry for the primary's herdr {@code terminal_id}.
+ *
+ * <p>Populated from the caller terminal of orchestration-side MCP tools
+ * ({@code bridge_send}, {@code bridge_spawn}) — tools that only the primary calls.
+ * A pinned terminal (from config) seeds the registry at construction and makes
+ * subsequent {@link #record(String)} calls no-ops.
+ *
+ * <p>The push loop ({@code ReplyPushLoop}) uses {@link #isKnown()} to decide
+ * whether active nudging is possible; an empty registry means the primary is
+ * off-host or non-herdr and delivery falls back to pull.
+ */
+public final class PrimaryRegistry {
+
+    private static final Logger log = LoggerFactory.getLogger(PrimaryRegistry.class);
+
+    private final AtomicReference<String> terminal = new AtomicReference<>();
+    private final boolean pinned;
+
+    /**
+     * CB-532: worker terminal → the lead that delegated to it. The single slot above answers "who is
+     * THE primary", a question with no correct answer once two leads orchestrate the same fleet:
+     * whichever called {@code bridge_send} first captured every nudge, including nudges for the
+     * other lead's delegations. This map answers the question that actually matters — "who is
+     * waiting on THIS worker" — and is what lets {@code primary.terminal} be retired.
+     */
+    private final ConcurrentHashMap<String, String> leadByTarget = new ConcurrentHashMap<>();
+
+    /**
+     * @param pinnedTerminal an optional pinned terminal from config ({@code null}/blank = unpinned)
+     */
+    public PrimaryRegistry(String pinnedTerminal) {
+        if (pinnedTerminal != null && !pinnedTerminal.isBlank()) {
+            this.terminal.set(pinnedTerminal);
+            this.pinned = true;
+            log.info("primary terminal pinned: {}", pinnedTerminal);
+        } else {
+            this.pinned = false;
+        }
+    }
+
+    /**
+     * Record a terminal_id. No-op when:
+     * <ul>
+     *   <li>the registry is pinned (config override),
+     *   <li>{@code terminalId} is {@code null} or blank (non-herdr caller).
+     * </ul>
+     */
+    public void record(String terminalId) {
+        if (pinned) return;
+        if (terminalId == null || terminalId.isBlank()) return;
+        String prev = terminal.getAndSet(terminalId);
+        if (prev == null) {
+            log.debug("primary terminal learned: {}", terminalId);
+        } else if (!prev.equals(terminalId)) {
+            log.debug("primary terminal changed: {} -> {}", prev, terminalId);
+        }
+    }
+
+    /**
+     * Record that {@code leadTerminal} owns the accepted delegation of worker {@code target} (CB-532).
+     *
+     * <p>Called from the {@code MessageService} accepted-delivery hook — only after a send has won
+     * the session's send lock and queued delivery — where both halves are known (CB-548). It is
+     * deliberately <em>not</em> called at {@code bridge_send} request time: a concurrent sender that
+     * times out {@code BUSY} must not steal a live delegation's reply routing without ever owning
+     * the turn. Last writer wins — if a second lead's later send is accepted, replies follow the
+     * lead that most recently delegated to it, which is the one waiting.
+     */
+    public void recordDelegation(String target, String leadTerminal) {
+        if (target == null || target.isBlank() || leadTerminal == null || leadTerminal.isBlank()) {
+            return;
+        }
+        leadByTarget.put(target, leadTerminal);
+    }
+
+    /** Forget a worker's delegating lead — call on release, so a torn-down session leaks nothing. */
+    public void forgetDelegation(String target) {
+        if (target != null) {
+            leadByTarget.remove(target);
+        }
+    }
+
+    /**
+     * Where a nudge about {@code target}'s reply should go: the lead that delegated to it, falling
+     * back to the single known primary.
+     *
+     * <p>The fallback matters after a daemon restart, which loses the map while the durable inbox
+     * keeps the reply. With one lead the fallback is unambiguous and correct. With several and no
+     * recorded delegation there is no right answer, so this returns empty rather than guessing —
+     * delivery degrades to pull, which is exactly what the durable inbox is for, instead of
+     * interrupting the wrong lead with someone else's result.
+     */
+    public Optional<String> nudgeTargetFor(String target) {
+        String lead = target == null ? null : leadByTarget.get(target);
+        return lead != null ? Optional.of(lead) : Optional.ofNullable(terminal.get());
+    }
+
+    /** The known primary terminal, or empty if not yet learned (and not pinned). */
+    public Optional<String> primaryTerminal() {
+        return Optional.ofNullable(terminal.get());
+    }
+
+    /** {@code true} once a terminal has been recorded (or was pinned at construction). */
+    public boolean isKnown() {
+        return terminal.get() != null;
+    }
+}

bridged/src/main/java/dev/ltms/bridged/mcp/ProcessCwdLookup.java

@@ -0,0 +1,13 @@
+package dev.ltms.bridged.mcp;
+
+/**
+ * Resolves a process's current working directory from its PID — the OS half of CB-112's
+ * "a worker inherits the primary's directory." Injectable so {@link ConnectionIdentity} stays
+ * testable without shelling out.
+ */
+@FunctionalInterface
+public interface ProcessCwdLookup {
+
+    /** The working directory of {@code pid}, or {@code null} if unknown. */
+    String cwdForPid(long pid);
+}

bridged/src/main/java/dev/ltms/bridged/member/ClaudeCodeLauncher.java

@@ -0,0 +1,321 @@
+package dev.ltms.bridged.member;
+
+import dev.ltms.bridged.config.BridgedConfig;
+import dev.ltms.bridged.guard.SubscriptionGuard;
+import dev.ltms.bridged.herdr.Agent;
+import dev.ltms.bridged.herdr.AgentControl;
+import dev.ltms.bridged.herdr.WorkspaceControl;
+import dev.ltms.bridged.peer.Capability;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.EnumSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+import java.util.function.Function;
+import java.util.function.LongSupplier;
+import java.util.function.Supplier;
+
+/**
+ * The {@link HerdrPeerLauncher} adapter for <strong>Claude Code</strong> — the safe path from a
+ * delegation request to a running off-subscription Claude.
+ *
+ * <p>Everything transport-related (tab/pane placement, the CB-306 spawn-readiness gate, unique
+ * naming, CB-117 orphan reap, teardown, listing, cwd resolution) lives in the base. This class
+ * supplies only the two Claude-specific seams:
+ * <ul>
+ *   <li>the {@code claude} name prefix (so reap matches {@code claude-*} panes, never another
+ *       adapter's), and</li>
+ *   <li>{@link #buildLaunch}, which encodes the subscription boundary: build the worker env with
+ *       {@code ANTHROPIC_BASE_URL}, assert that host is on the allowlist <em>before</em> touching
+ *       herdr, and mount the bridge MCP + reply charter as inline launch flags. A worker's base_url
+ *       lives in the env map handed to herdr and nowhere else; {@code bridged}'s own environment is
+ *       never mutated, and nothing is written to the worker's profile.</li>
+ * </ul>
+ */
+public final class ClaudeCodeLauncher extends HerdrPeerLauncher {
+
+    /** Label prefix for this adapter's herdr agent names (drives naming + orphan reap). */
+    private static final String NAME_PREFIX = "claude";
+
+    private static final Logger log = LoggerFactory.getLogger(ClaudeCodeLauncher.class);
+
+    private final SubscriptionGuard guard;
+
+    /**
+     * Production constructor — disables the spawn-ready gate ({@code spawnReadyTimeoutMs == 0}) so
+     * existing deployments and tests keep the legacy non-blocking spawn semantics.
+     */
+    public ClaudeCodeLauncher(AgentControl agents, WorkspaceControl spaces, SubscriptionGuard guard,
+                              Map<String, BridgedConfig.Profile> profiles, String defaultProfile,
+                              Function<String, String> env) {
+        this(agents, spaces, guard, profiles, defaultProfile, env, 0,
+                System::currentTimeMillis, () -> sleepUninterruptibly(300));
+    }
+
+    /**
+     * Production constructor with spawn-ready gate enabled. The gate polls {@code agents.status()}
+     * until the pane reports an injectable state or {@code spawnReadyTimeoutMs} elapses.
+     */
+    public ClaudeCodeLauncher(AgentControl agents, WorkspaceControl spaces, SubscriptionGuard guard,
+                              Map<String, BridgedConfig.Profile> profiles, String defaultProfile,
+                              Function<String, String> env,
+                              long spawnReadyTimeoutMs, long spawnReadyPollMs) {
+        this(agents, spaces, guard, profiles, defaultProfile, env,
+                spawnReadyTimeoutMs, spawnReadyPollMs, null);
+    }
+
+    /**
+     * Production constructor carrying the fleet-wide tab-label template (CB-557). The template comes
+     * from {@code fleet.tabLabel}, which a profile cannot know because it names the member's
+     * <em>role</em>; a profile may still override it with its own {@code tabLabel}.
+     */
+    public ClaudeCodeLauncher(AgentControl agents, WorkspaceControl spaces, SubscriptionGuard guard,
+                              Map<String, BridgedConfig.Profile> profiles, String defaultProfile,
+                              Function<String, String> env,
+                              long spawnReadyTimeoutMs, long spawnReadyPollMs,
+                              Supplier<BridgedConfig.Fleet> fleet) {
+        this(agents, spaces, guard, profiles, defaultProfile, env,
+                spawnReadyTimeoutMs,
+                System::currentTimeMillis, () -> sleepUninterruptibly(spawnReadyPollMs),
+                fleet);
+    }
+
+    /**
+     * Full testability constructor. Every injectable collaborator is explicit so unit tests supply
+     * fakes for the clock ({@code nowMillis}) and poll-loop wait ({@code sleeper}). The
+     * {@code sleeper} is never called when the gate is disabled ({@code spawnReadyTimeoutMs == 0}).
+     *
+     * @param agents               herdr agent control (start, status, close)
+     * @param spaces               workspace / tab control (ensure, create, close)
+     * @param guard                subscription-boundary guard (checked before spawning)
+     * @param profiles             configured worker profiles
+     * @param defaultProfile       profile a no-argument spawn uses (nullable)
+     * @param env                  host env lookup (injectable for tests)
+     * @param spawnReadyTimeoutMs  max ms to wait for injectable state (0 disables the gate)
+     * @param nowMillis            monotonic clock source (e.g. {@code System::currentTimeMillis})
+     * @param sleeper              sleep/wait hook (e.g. {@code () -> Thread.sleep(pollMs)}); it
+     *                             already encodes the poll interval, so the 8th positional argument
+     *                             (poll ms) is accepted for API symmetry but otherwise unused here
+     */
+    public ClaudeCodeLauncher(AgentControl agents, WorkspaceControl spaces, SubscriptionGuard guard,
+                              Map<String, BridgedConfig.Profile> profiles, String defaultProfile,
+                              Function<String, String> env,
+                              long spawnReadyTimeoutMs,
+                              LongSupplier nowMillis, Runnable sleeper) {
+        this(agents, spaces, guard, profiles, defaultProfile, env,
+                spawnReadyTimeoutMs, nowMillis, sleeper, null);
+    }
+
+    /**
+     * Full testability constructor, plus the fleet-wide tab-label template (CB-557).
+     *
+     * @param fleet live fleet config, read once for each spawn
+     */
+    public ClaudeCodeLauncher(AgentControl agents, WorkspaceControl spaces, SubscriptionGuard guard,
+                              Map<String, BridgedConfig.Profile> profiles, String defaultProfile,
+                              Function<String, String> env,
+                              long spawnReadyTimeoutMs,
+                              LongSupplier nowMillis, Runnable sleeper,
+                              Supplier<BridgedConfig.Fleet> fleet) {
+        super(NAME_PREFIX, agents, spaces, profiles, defaultProfile, env,
+                spawnReadyTimeoutMs, nowMillis, sleeper, fleet);
+        this.guard = guard;
+    }
+
+    /**
+     * {@inheritDoc}
+     *
+     * <p>The spawn sequence encodes the subscription boundary: assert the profile's base_url is on
+     * the allowlist <em>before</em> any herdr call, then build the worker env with
+     * {@code ANTHROPIC_*}, the parity-neutral git-forge grant, and the bridge MCP + reply charter
+     * mounted as inline launch flags. When the request carries session identity (CB-547a) it is
+     * applied here — see {@link #applySessionIdentity}.
+     */
+    @Override
+    protected Launch buildLaunch(BridgedConfig.Profile cfg, LaunchSpec spec) {
+        // CB-539: a profile may deliberately opt into the subscription (subscription: true) when no
+        // off-subscription endpoint exists for it — e.g. `sonnet` on `ccs`. That profile gets no
+        // ANTHROPIC_BASE_URL/AUTH_TOKEN (there is nothing to point them at) and the guard's base_url
+        // requirement is skipped FOR IT ONLY. Every other profile keeps the hard boundary below.
+        boolean onSubscription = cfg.isSubscription();
+        String baseUrl = cfg.baseUrl();
+
+        if (onSubscription) {
+            // NO SILENT CONTRADICTION: subscription:true + a baseUrl state opposite intents; refuse
+            // loudly rather than pick a winner.
+            if (baseUrl != null && !baseUrl.isBlank()) {
+                throw new IllegalStateException("profile '" + cfg.profile()
+                        + "' sets both subscription: true and a baseUrl ('" + baseUrl + "') — the two "
+                        + "are contradictory: a subscription profile must not point at an endpoint. "
+                        + "Drop baseUrl, or drop subscription: true.");
+            }
+            // Visible without anyone going looking for it: this worker bills the subscription.
+            log.warn("spawning profile '{}' on the Claude subscription (subscription: true) — this "
+                    + "worker WILL bill the operator's subscription", cfg.profile());
+        } else {
+            guard.assertWorker(baseUrl); // hard stop before we spawn anything
+        }
+
+        Map<String, String> workerEnv = baseEnv(cfg);
+        if (onSubscription) {
+            // CB-542 belt-and-braces: on the subscription path no guard vets these two keys, and the
+            // profile's env: is layered in by baseEnv — so strip any that rode in there. Config load
+            // already rejects this (loudly, naming the profile); this makes the boundary hold even
+            // for a profile built in code that never passed through that validation.
+            workerEnv.remove("ANTHROPIC_BASE_URL");
+            workerEnv.remove("ANTHROPIC_AUTH_TOKEN");
+        } else {
+            workerEnv.put("ANTHROPIC_BASE_URL", baseUrl);
+            putIfPresent(workerEnv, "ANTHROPIC_AUTH_TOKEN", env.apply(cfg.tokenEnv()));
+        }
+        putIfPresent(workerEnv, "ANTHROPIC_MODEL", cfg.model());
+        putIfPresent(workerEnv, "CLAUDE_CONFIG_DIR", cfg.configDir());
+        applyGitToken(workerEnv, cfg);
+
+        // CB-547a: Claude Code can MINT its own session id, so bridged chooses it — a fresh spawn
+        // gets a UUID we pass as --session-id and return from agentSessionId(), so the resume
+        // handle is known BEFORE the agent has written anything; a resume spawn adopts its prior
+        // id via -r and passes no --session-id (the two conflict). Both are injected before the
+        // model flag so --model keeps outranking the operator's own argv.
+        // mutableArgv: argvWithBridge may hand back the profile's own (immutable) List.of when it
+        // has no MCP — session flags must be added into a list we own.
+        List<String> argv = mutableArgv(argvWithBridge(cfg));
+        String agentSessionId = applySessionIdentity(argv, spec.sessionName(), spec.resumeSessionId());
+        return new Launch(workerEnv, argvWithModel(argv, cfg), agentSessionId);
+    }
+
+    /**
+     * Add the Claude-specific session-identity flags to {@code argv} and return the peer's OWN
+     * session id — the resume handle. A resume request passes the prior id via {@code -r} and
+     * returns that id; a fresh named session mints a new UUID, passes it via {@code --session-id},
+     * and returns the mint. The bridge's logical name rides along as {@code -n} when present. When
+     * <em>no</em> identity is requested (sessionName and resumeSessionId both blank) this adds
+     * nothing and returns {@code null}, keeping the legacy no-identity launch byte-identical.
+     */
+    private static String applySessionIdentity(List<String> argv, String sessionName, String resumeSessionId) {
+        boolean resuming = resumeSessionId != null && !resumeSessionId.isBlank();
+        boolean named = sessionName != null && !sessionName.isBlank();
+        if (!resuming && !named) {
+            return null; // no identity requested — keep the legacy launch byte-identical
+        }
+        if (named) {
+            argv.add("-n");
+            argv.add(sessionName);
+        }
+        if (resuming) {
+            argv.add("-r");
+            argv.add(resumeSessionId);
+            return resumeSessionId;
+        }
+        String minted = UUID.randomUUID().toString();
+        argv.add("--session-id");
+        argv.add(minted);
+        return minted;
+    }
+
+    /**
+     * The launch argv, plus — when {@code worker.mcpUrl} is set — inline {@code --mcp-config} for
+     * the bridge server and {@code --append-system-prompt} for the {@link #REPLY_CHARTER}. Neither
+     * touches the profile's config; both are pure command-line flags. This inline-flag mount is
+     * Claude Code specific — other adapters mount MCP and instructions their own way.
+     */
+    private List<String> argvWithBridge(BridgedConfig.Profile cfg) {
+        if (!cfg.hasMcp()) {
+            return cfg.argv();
+        }
+        String mcpJson = "{\"mcpServers\":{\"bridge\":{\"type\":\"http\",\"url\":\""
+                + cfg.mcpUrl() + "\"}}}";
+        List<String> argv = mutableArgv(cfg.argv());
+        argv.add("--mcp-config");
+        argv.add(mcpJson);
+        argv.add("--append-system-prompt");
+        argv.add(REPLY_CHARTER);
+        return argv;
+    }
+
+    /**
+     * Pin the model on the command line as well as in {@code ANTHROPIC_MODEL} (CB-533).
+     *
+     * <p>The env var alone is not a reliable pin for this adapter, because the argv is usually a
+     * launcher rather than {@code claude} itself — {@code ["ccs", "<profile>"]} — and {@code ccs}
+     * exports its profile's own model family ({@code ANTHROPIC_MODEL}, {@code DEFAULT_OPUS/SONNET/
+     * HAIKU}, {@code CLAUDE_CODE_SUBAGENT_MODEL}) over whatever it inherited. A worker profile that
+     * set {@code model:} therefore got silently overruled by its own launcher. Claude Code's
+     * {@code --model} flag outranks the environment, and {@code ccs <profile> [claude-args...]}
+     * passes trailing arguments through, so the flag survives the wrapper.
+     *
+     * <p>Appended last so it also outranks anything in the operator's own {@code argv}. Profiles
+     * that deliberately leave {@code model:} unset (letting {@code ccs} own model selection, as
+     * {@code gx10} does) are untouched — this adds nothing when there is nothing to add. This is
+     * the {@code kind: claude} counterpart of the opencode adapter's {@code -m provider/model}.
+     */
+    private static List<String> argvWithModel(List<String> argv, BridgedConfig.Profile cfg) {
+        if (cfg.model() == null || cfg.model().isBlank()) {
+            return argv;
+        }
+        List<String> withModel = mutableArgv(argv);
+        withModel.add("--model");
+        withModel.add(cfg.model());
+        return withModel;
+    }
+
+    // --- Agent-returning convenience spawns (used by callers/tests that want the herdr Agent) ---
+
+    /** Spawn a worker for the default profile in the resolved default cwd. */
+    public Agent spawn() {
+        return spawnInternal(null, null, null);
+    }
+
+    /** Spawn a worker for a named profile (null → default) in the resolved default cwd. */
+    public Agent spawn(String profileName) {
+        return spawnInternal(profileName, null, null);
+    }
+
+    /** Spawn a worker for a named profile with an explicit requested/caller cwd (CB-112). */
+    public Agent spawn(String profileName, String requestedCwd, String callerCwd) {
+        return spawnInternal(profileName, requestedCwd, callerCwd);
+    }
+
+    // --- capabilities --------------------------------------------------------------------------
+
+    @Override
+    public Set<Capability> capabilities() {
+        Set<Capability> caps = EnumSet.of(Capability.MID_TURN_ASK, Capability.WORKTREE,
+                Capability.CONTEXT_RESET, Capability.ORPHAN_REAP,
+                Capability.SESSION_NAME, Capability.SESSION_RESUME);
+        if (hasGitTokenProfile()) {
+            caps.add(Capability.SELF_PR);
+        }
+        return Set.copyOf(caps);
+    }
+
+    @Override
+    public boolean clearContext(String id) {
+        String target = agentTarget(id);
+        if (target == null) {
+            return false;
+        }
+        // This deliberately bypasses Injector: /clear is housekeeping, not a delegated turn.
+        agents().send(target, "/clear");
+        return true;
+    }
+
+    /** Whether any configured profile opts into a git-forge token (required for {@link Capability#SELF_PR}). */
+    private boolean hasGitTokenProfile() {
+        return profileConfigs().stream().anyMatch(BridgedConfig.Profile::hasGitToken);
+    }
+
+    // --- CB-117 reap predicate (Claude prefix), kept for direct unit testing -------------------
+
+    /**
+     * Whether {@code name} is a Claude Code bridge worker started by a <em>different</em> process
+     * than {@code currentNonce}. A thin {@code claude}-prefix binding of
+     * {@link HerdrPeerLauncher#isForeignWorker(String, String, String)}.
+     */
+    static boolean isForeignWorker(String name, String currentNonce) {
+        return HerdrPeerLauncher.isForeignWorker(NAME_PREFIX, name, currentNonce);
+    }
+}

bridged/src/main/java/dev/ltms/bridged/member/CompositePeerLauncher.java

@@ -0,0 +1,422 @@
+package dev.ltms.bridged.member;
+
+import dev.ltms.bridged.config.BridgedConfig;
+import dev.ltms.bridged.herdr.Agent;
+import dev.ltms.bridged.peer.Capability;
+import dev.ltms.bridged.peer.MemberRole;
+import dev.ltms.bridged.peer.PeerHandle;
+import dev.ltms.bridged.peer.PeerLauncher;
+import dev.ltms.bridged.peer.PeerUnreachableException;
+import dev.ltms.bridged.peer.SpawnRequest;
+import dev.ltms.bridged.placement.PlacementCandidate;
+import dev.ltms.bridged.placement.PlacementContext;
+import dev.ltms.bridged.placement.PlacementException;
+import dev.ltms.bridged.placement.PlacementPolicies;
+import dev.ltms.bridged.placement.PlacementPolicy;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.EnumSet;
+import java.util.HashSet;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Function;
+import java.util.function.Supplier;
+
+/**
+ * The {@link PeerLauncher} the core actually holds when more than one adapter is configured — a thin
+ * router in front of one {@link HerdrPeerLauncher} per peer {@code kind} (Claude Code, opencode, …).
+ * It owns no transport of its own; it dispatches each SPI call to the delegate that owns the profile
+ * involved, and fans the fleet-wide queries (list/reap/caps/profiles) across all delegates.
+ *
+ * <p>Routing rules:
+ * <ul>
+ *   <li><strong>By profile</strong> — {@link #spawn}, {@link #effectiveCwd}, {@link #parityOverlay}
+ *       resolve the profile (a null/blank name → the global {@link #defaultProfile}) and delegate to
+ *       the single adapter that declares it. Profiles partition cleanly across adapters: the
+ *       constructor rejects a name claimed by two.</li>
+ *   <li><strong>By pane id</strong> — {@link #stop} routes to the adapter that spawned that pane
+ *       (recorded at spawn time). A pane the composite never spawned (only real for a caller that
+ *       hand-rolls an id) falls back to the first delegate; teardown is pane-id addressed and
+ *       tab cleanup is single-occupant guarded, so it is safe either way.</li>
+ *   <li><strong>Fleet-wide</strong> — {@link #reapOrphanWorkers} and {@link #capabilities} fan out
+ *       and combine. {@link #list} is deduplicated by pane id because every herdr-backed delegate
+ *       shares one herdr connection and so reports the same global agent set.</li>
+ * </ul>
+ *
+ * <p>CB-518: an unqualified spawn is routed through a {@link PlacementPolicy}. The default
+ * {@code fixed} policy reproduces the historical default-profile behaviour; {@code weighted} uses
+ * smooth weighted round-robin with {@code maxLoad} gating. If a chosen profile fails with
+ * {@link PeerUnreachableException}, the composite advances to the next available candidate and
+ * retries, bounded by the number of candidates.
+ */
+public final class CompositePeerLauncher implements PeerLauncher {
+
+    private static final Logger log = LoggerFactory.getLogger(CompositePeerLauncher.class);
+
+    private final List<HerdrPeerLauncher> delegates;
+    private final Map<String, HerdrPeerLauncher> byProfile;
+    private final String defaultProfile;
+
+    /** paneId → the delegate that spawned it, so {@link #stop} tears down through the right adapter. */
+    private final Map<String, HerdrPeerLauncher> spawnedBy = new ConcurrentHashMap<>();
+
+    private final Function<String, Integer> liveCount;
+
+    /**
+     * CB-559: the placement inputs are read <em>per spawn</em>, not captured at construction, so a
+     * config reload changes where the next member lands without a restart. These are the hot keys —
+     * role pools, an existing profile's weight/maxLoad, and the placement policy. What cannot change
+     * this way is the set of adapters ({@link #byProfile}), because a new backend needs a launcher
+     * and launchers are built once; {@code ConfigRef} classifies that as deferred and says so.
+     */
+    private final Supplier<Map<String, BridgedConfig.Profile>> profileConfigs;
+    private final Supplier<PlacementPolicy> placementPolicy;
+
+    /**
+     * CB-557: the role pools an unqualified spawn draws its candidates from. A supplier that yields
+     * {@code null}, and an empty pool for a role, both fall back to every configured profile — the
+     * pre-CB-557 behaviour.
+     */
+    private final Supplier<BridgedConfig.Fleet> fleet;
+
+    /**
+     * Backward-compatible constructor: fixed placement, no live-counting. Use this for tests and
+     * simple wiring; it preserves the pre-CB-518 behaviour exactly.
+     *
+     * @param delegates      one adapter per configured peer kind; must be non-empty and declare
+     *                       disjoint profile-name sets
+     * @param defaultProfile the profile a no-argument spawn resolves to (may be null)
+     * @throws IllegalArgumentException if {@code delegates} is empty or two adapters claim one profile
+     */
+    public CompositePeerLauncher(List<HerdrPeerLauncher> delegates, String defaultProfile) {
+        this(delegates, defaultProfile, Map.of(), PlacementPolicies.fixed(), _ -> 0);
+    }
+
+    /**
+     * Production constructor with a placement policy and live-worker counter.
+     *
+     * @param delegates      one adapter per configured peer kind; must be non-empty and declare
+     *                       disjoint profile-name sets
+     * @param defaultProfile the profile a no-argument spawn resolves to under {@code fixed} policy
+     * @param profileConfigs all configured worker profiles (used for candidate weights/caps)
+     * @param placementPolicy which policy governs unqualified spawns
+     * @param liveCount      live worker count per profile (must never return {@code null})
+     */
+    public CompositePeerLauncher(List<HerdrPeerLauncher> delegates,
+                                 String defaultProfile,
+                                 Map<String, BridgedConfig.Profile> profileConfigs,
+                                 PlacementPolicy placementPolicy,
+                                 Function<String, Integer> liveCount) {
+        this(delegates, defaultProfile, profileConfigs, placementPolicy, liveCount, null);
+    }
+
+    /**
+     * Production constructor with role pools (CB-557). An unqualified spawn draws its candidates from
+     * {@code fleet.<role>} instead of from every configured profile, so a reviewer is placed on a
+     * reviewer backend and never on, say, the architect-only one.
+     *
+     * @param fleet the configured role pools; {@code null} ⇒ every profile is a candidate for every
+     *              role, which is the pre-CB-557 behaviour
+     */
+    public CompositePeerLauncher(List<HerdrPeerLauncher> delegates,
+                                 String defaultProfile,
+                                 Map<String, BridgedConfig.Profile> profileConfigs,
+                                 PlacementPolicy placementPolicy,
+                                 Function<String, Integer> liveCount,
+                                 BridgedConfig.Fleet fleet) {
+        // LinkedHashMap, not Map.copyOf: candidates() promises definition order and the weighted
+        // policy breaks exact-weight ties on it, so a salted iteration order would make placement
+        // differ from one JVM run to the next.
+        this(delegates, defaultProfile,
+                constant(Collections.unmodifiableMap(new LinkedHashMap<>(profileConfigs))),
+                constant(placementPolicy), liveCount, constant(fleet));
+    }
+
+    /**
+     * Production constructor that re-reads its placement inputs per spawn (CB-559), so a config
+     * reload retargets the next member without a restart.
+     *
+     * @param config the live configuration — read at every spawn, never captured
+     */
+    public CompositePeerLauncher(List<HerdrPeerLauncher> delegates,
+                                 String defaultProfile,
+                                 Supplier<BridgedConfig> config,
+                                 Function<String, Integer> liveCount) {
+        this(delegates, defaultProfile,
+                () -> config.get().profiles(),
+                () -> PlacementPolicies.fromName(config.get().placement()),
+                liveCount,
+                () -> config.get().fleet());
+    }
+
+    /** The all-suppliers form every other constructor funnels into. */
+    private CompositePeerLauncher(List<HerdrPeerLauncher> delegates,
+                                  String defaultProfile,
+                                  Supplier<Map<String, BridgedConfig.Profile>> profileConfigs,
+                                  Supplier<PlacementPolicy> placementPolicy,
+                                  Function<String, Integer> liveCount,
+                                  Supplier<BridgedConfig.Fleet> fleet) {
+        this.fleet = fleet;
+        if (delegates.isEmpty()) {
+            throw new IllegalArgumentException("at least one peer adapter must be configured");
+        }
+        this.delegates = List.copyOf(delegates);
+        this.defaultProfile = defaultProfile;
+        this.profileConfigs = profileConfigs;
+        this.placementPolicy = placementPolicy;
+        this.liveCount = liveCount;
+        Map<String, HerdrPeerLauncher> index = new LinkedHashMap<>();
+        for (HerdrPeerLauncher d : this.delegates) {
+            for (String profile : d.profiles()) {
+                HerdrPeerLauncher prev = index.putIfAbsent(profile, d);
+                if (prev != null) {
+                    throw new IllegalArgumentException(
+                            "worker profile '" + profile + "' is claimed by two peer adapters");
+                }
+            }
+        }
+        // Order-preserving for the same reason, and because profiles() is user-visible (bridge_profiles).
+        this.byProfile = Collections.unmodifiableMap(index);
+    }
+
+    /** A supplier of a value fixed at construction — how the non-reloading constructors funnel in. */
+    private static <T> Supplier<T> constant(T value) {
+        return () -> value;
+    }
+
+    /**
+     * The currently-configured profiles, never null.
+     *
+     * <p>Read fresh on every call so a reload is visible; a caller that needs two consistent reads
+     * takes one local, as {@link #poolFor} does.
+     */
+    private Map<String, BridgedConfig.Profile> profiles0() {
+        Map<String, BridgedConfig.Profile> m = profileConfigs.get();
+        return m == null ? Map.of() : m;
+    }
+
+    /** The adapter owning {@code profileName} (null/blank → the default). Throws on an unknown profile. */
+    private HerdrPeerLauncher route(String profileName) {
+        String resolved = (profileName == null || profileName.isBlank()) ? defaultProfile : profileName;
+        if (resolved == null) {
+            // No profile and no default configured — hand to the first delegate so it raises the
+            // same "no default" error it would on its own; keeps the SPI contract single-sourced.
+            return delegates.getFirst();
+        }
+        HerdrPeerLauncher d = byProfile.get(resolved);
+        if (d == null) {
+            throw new IllegalArgumentException("unknown worker profile: " + resolved);
+        }
+        return d;
+    }
+
+    @Override
+    public PeerHandle spawn(SpawnRequest req) {
+        String requestedProfile = req.profileName();
+        if (requestedProfile != null && !requestedProfile.isBlank()) {
+            // An explicit profile bypasses the placement policy, but not the capacity cap: maxLoad
+            // is documented as an unconditional limit on this profile (BridgedConfig.Profile), and
+            // the charter makes explicit-profile spawns the normal path — so skipping the check
+            // here would leave the cap dead config in real operation.
+            HerdrPeerLauncher d = route(requestedProfile);
+            enforceMaxLoad(requestedProfile);
+            PeerHandle handle = d.spawn(req);
+            spawnedBy.put(handle.id(), d);
+            return handle;
+        }
+
+        // CB-557: an unqualified spawn is placed inside the pool of the role it asked for, not across
+        // the whole profile list. An EXPLICIT profile (above) is left alone on purpose — it is the
+        // operator overriding, and refusing it would break `bridge_spawn{profile:"opus"}`, which
+        // carries no role and so would be judged against the dev pool it was never meant for.
+        List<PlacementCandidate> candidates = candidates(req.role());
+        String roleDefault = defaultProfileFor(req.role());
+        Set<String> unreachable = new HashSet<>();
+        PlacementContext ctx = new PlacementContext(roleDefault, candidates, liveCount, unreachable);
+
+        int maxAttempts = candidates.isEmpty() ? 1 : candidates.size();
+        for (int attempt = 0; attempt < maxAttempts; attempt++) {
+            // Deliberately uncaught: when no candidate is left (all at cap, or all unreachable) the
+            // policy already throws a clear message. Catching it to rethrow a generic
+            // PeerUnreachableException would replace a precise diagnosis with a vague one.
+            PlacementCandidate chosen = placementPolicy.get().select(ctx);
+
+            HerdrPeerLauncher d = byProfile.get(chosen.profile());
+            if (d == null) {
+                // A configured profile with no adapter is a wiring bug; fail fast.
+                unreachable.add(chosen.profile());
+                continue;
+            }
+
+            // CB-547a: route the chosen profile but keep the caller's session identity — dropping it
+            // here would silently sever the resume handle on every policy-routed spawn. CB-557: the
+            // role rides along for the same reason, or a routed spawn would be labelled as a dev.
+            SpawnRequest routedReq = new SpawnRequest(chosen.profile(), req.requestedCwd(), req.callerCwd(),
+                    req.sessionName(), req.resumeSessionId(), req.role());
+            try {
+                PeerHandle handle = d.spawn(routedReq);
+                spawnedBy.put(handle.id(), d);
+                return handle;
+            } catch (PeerUnreachableException e) {
+                log.warn("spawn on profile {} unreachable, will retry next candidate if any: {}",
+                        chosen.profile(), e.getMessage());
+                unreachable.add(chosen.profile());
+                // Update the context for the next selection so the policy excludes this profile.
+                ctx = new PlacementContext(roleDefault, candidates, liveCount, unreachable);
+            }
+        }
+
+        throw new PeerUnreachableException(
+                "no reachable worker profile available after trying " + unreachable.size()
+                        + " candidate(s): " + String.join(", ", unreachable));
+    }
+
+    /**
+     * Refuse an explicit-profile spawn when the profile is at its {@code maxLoad} cap.
+     *
+     * <p>maxLoad is a documented, unconditional capacity limit (see {@code BridgedConfig.Profile#maxLoad}),
+     * and the charter makes explicit-profile spawns the normal path — so enforcing it only in placement
+     * ({@code PlacementPolicyUtil}, package-private, hence not linked) would leave the cap dead config
+     * on every call that names a profile. Same rule as placement: {@code live >= cap} is at capacity.
+     *
+     * <p>Deliberately no fallback to another profile: the caller named {@code profile} for a cost/model
+     * reason, and silently re-routing a paid-tier (subscription) request elsewhere is worse than
+     * refusing it. A caller that wants placement should omit the profile and let the policy pick.
+     *
+     * <p>Known TOCTOU limitation — documented, not fixed. {@link #liveCount} is read outside any lock and
+     * {@code SessionManager} registers a session only after {@code launcher.spawn} returns, so two
+     * genuinely concurrent spawns can both pass this check. The race already exists on the placement
+     * path. Closing it needs slot reservation in the registry; serializing spawn here would block on
+     * the readiness gate and is a far worse trade.
+     *
+     * @param profile the profile the caller explicitly named
+     * @throws PlacementException when the profile is at capacity
+     */
+    private void enforceMaxLoad(String profile) {
+        // Absent config, or a config whose maxLoad normalized to null (non-positive ⇒ unlimited at
+        // load), means no cap — never cap what wasn't configured.
+        BridgedConfig.Profile cfg = profiles0().get(profile);
+        Integer cap = (cfg == null) ? null : cfg.maxLoad();
+        if (cap == null) {
+            return;
+        }
+        int live = liveCount.apply(profile);
+        if (live >= cap) {
+            throw new PlacementException("worker profile '" + profile + "' is at maxLoad: " + live
+                    + " live >= " + cap + " cap; refusing spawn — no fallback to another profile");
+        }
+    }
+
+    /**
+     * The profile names {@code role} may be placed on, in definition order.
+     *
+     * <p>An empty or absent pool means "unconstrained", not "nothing allowed": a config that declares
+     * no pool for a role must keep spawning, so it falls back to every configured profile. Names in a
+     * pool that no adapter declares are dropped here rather than thrown — config load already rejects
+     * a pool entry with no profile, so a survivor is a profile this particular composite does not own.
+     */
+    private List<String> poolFor(MemberRole role) {
+        Map<String, BridgedConfig.Profile> configured = profiles0();
+        BridgedConfig.Fleet f = fleet.get();
+        List<String> pool = (f == null) ? List.of() : f.profilesFor(role);
+        List<String> known = pool.stream().filter(configured::containsKey).toList();
+        return known.isEmpty() ? List.copyOf(configured.keySet()) : known;
+    }
+
+    /** The profile an unqualified spawn for {@code role} falls back to under {@code fixed} placement. */
+    private String defaultProfileFor(MemberRole role) {
+        List<String> pool = poolFor(role);
+        return pool.isEmpty() ? defaultProfile : pool.getFirst();
+    }
+
+    /** Build the candidate list from {@code role}'s pool, in definition order. */
+    private List<PlacementCandidate> candidates(MemberRole role) {
+        List<PlacementCandidate> out = new ArrayList<>();
+        for (String name : poolFor(role)) {
+            BridgedConfig.Profile w = profiles0().get(name);
+            if (w != null) {
+                out.add(new PlacementCandidate(name, null, w.weight(), w.maxLoad()));
+            }
+        }
+        return out;
+    }
+
+    @Override
+    public String effectiveCwd(SpawnRequest req) {
+        return route(req.profileName()).effectiveCwd(req);
+    }
+
+    @Override
+    public List<String> parityOverlay(String profileName) {
+        return route(profileName).parityOverlay(profileName);
+    }
+
+    @Override
+    public void stop(String id) {
+        HerdrPeerLauncher d = spawnedBy.remove(id);
+        if (d == null) {
+            log.debug("stop({}) — no recorded owner, routing to the first adapter (pane-addressed)", id);
+            d = delegates.getFirst();
+        }
+        d.stop(id);
+    }
+
+    @Override
+    public boolean clearContext(String id) {
+        HerdrPeerLauncher delegate = spawnedBy.get(id);
+        if (delegate == null) {
+            log.debug("clearContext({}) ignored — no recorded owning adapter", id);
+            return false;
+        }
+        return delegate.clearContext(id);
+    }
+
+    @Override
+    public Set<String> profiles() {
+        return byProfile.keySet();
+    }
+
+    @Override
+    public String defaultProfile() {
+        return defaultProfile;
+    }
+
+    /** Every herdr agent, deduplicated by pane id (all delegates share one herdr and list globally). */
+    @Override
+    public List<Agent> list() {
+        Map<String, Agent> byPane = new LinkedHashMap<>();
+        for (HerdrPeerLauncher d : delegates) {
+            for (Agent a : d.list()) {
+                if (a.paneId() != null) {
+                    byPane.putIfAbsent(a.paneId(), a);
+                }
+            }
+        }
+        return List.copyOf(byPane.values());
+    }
+
+    @Override
+    public int reapOrphanWorkers() {
+        int reaped = 0;
+        for (HerdrPeerLauncher d : delegates) {
+            reaped += d.reapOrphanWorkers();
+        }
+        return reaped;
+    }
+
+    /** The union of every adapter's capabilities — a capability any adapter offers, the fleet offers. */
+    @Override
+    public Set<Capability> capabilities() {
+        EnumSet<Capability> caps = EnumSet.noneOf(Capability.class);
+        for (HerdrPeerLauncher d : delegates) {
+            caps.addAll(d.capabilities());
+        }
+        return Set.copyOf(caps);
+    }
+}

bridged/src/main/java/dev/ltms/bridged/member/HerdrPeerLauncher.java

@@ -0,0 +1,740 @@
+package dev.ltms.bridged.member;
+
+import dev.ltms.bridged.config.BridgedConfig;
+import dev.ltms.bridged.herdr.Agent;
+import dev.ltms.bridged.herdr.AgentControl;
+import dev.ltms.bridged.herdr.HerdrException;
+import dev.ltms.bridged.herdr.Tab;
+import dev.ltms.bridged.herdr.Workspace;
+import dev.ltms.bridged.herdr.WorkspaceControl;
+import dev.ltms.bridged.peer.MemberRole;
+import dev.ltms.bridged.peer.PeerHandle;
+import dev.ltms.bridged.peer.PeerLauncher;
+import dev.ltms.bridged.peer.PeerUnreachableException;
+import dev.ltms.bridged.peer.SpawnRequest;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.security.SecureRandom;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.function.Function;
+import java.util.function.LongSupplier;
+import java.util.function.Supplier;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * Abstract base for {@link PeerLauncher} adapters that materialize a peer as a <em>herdr</em>
+ * agent (a CLI coding agent running in a herdr tab/pane). It owns everything that is the same
+ * regardless of <em>which</em> coding agent runs: tab/pane placement, the CB-306 spawn-readiness
+ * gate, unique naming, CB-117 orphan reap, teardown, {@link #list() listing}, and cwd resolution.
+ *
+ * <p>Two seams are peer-specific and supplied by the concrete adapter:
+ * <ul>
+ *   <li>{@code namePrefix} (constructor arg) — the label prefix ({@code claude}, {@code opencode})
+ *       that drives both unique naming and the orphan-reap pattern, so each adapter reaps only its
+ *       own kind of pane and never another's.</li>
+ *   <li>{@link #buildLaunch(BridgedConfig.Profile, LaunchSpec)} — the peer-specific env map + argv, including any
+ *       subscription/guard check, MCP mount, and instruction injection. The base never sees how the
+ *       peer is configured; it only places and starts the returned {@link Launch}.</li>
+ * </ul>
+ *
+ * <p>Placement: in the default {@code tab} policy a peer lands in its own tab inside a dedicated
+ * worker space (found-or-created once, then shared), so peers never split or clutter the user's
+ * real work spaces. Teardown removes the peer's pane <em>and</em> its now-empty tab, tolerating an
+ * already-gone peer so a repeated DELETE is harmless.
+ */
+public abstract class HerdrPeerLauncher implements PeerLauncher {
+
+    private static final Logger log = LoggerFactory.getLogger(HerdrPeerLauncher.class);
+
+    /** herdr rejects a duplicate agent {@code name}; we retry a bumped name this many times. */
+    private static final int NAME_RETRIES = 8;
+
+    /**
+     * Retries for {@code agent.start} against a seed pane whose shell has not reached its prompt
+     * yet — {@code tab.create}/{@code pane.split} return as soon as the pane exists, and herdr
+     * refuses to start an agent in a pane that is not "an available shell" ({@code agent_pane_busy}).
+     */
+    private static final int SHELL_READY_RETRIES = 20;
+
+    private final String namePrefix;                       // label prefix: naming + reap scheme
+    private final AgentControl agents;
+    private final WorkspaceControl spaces;
+    private final Map<String, BridgedConfig.Profile> profiles; // profile name → spawn settings
+    private final String defaultProfile;                      // profile a no-arg spawn uses (nullable)
+
+    /** Host env lookup (injectable for tests); adapters read it in {@link #buildLaunch}. */
+    protected final Function<String, String> env;
+
+    private final AtomicLong nameSeq = new AtomicLong(); // per-peer counter (herdr agent names only)
+
+    /**
+     * Live fleet config, read once per spawn. A null supplier or value leaves tab labels at their
+     * default and supplies no role charter. A profile's own {@code tabLabel} still overrides it.
+     *
+     * <p>CB-559: a supplier rather than a snapshot, so a config reload affects the next launch
+     * without a restart. Existing tabs keep the label they were given.
+     */
+    private final Supplier<BridgedConfig.Fleet> fleet;
+
+    /** The final instruction always requires a bridge reply when the bridge MCP is mounted. */
+    protected static final String REPLY_CHARTER =
+            "You are a spawned member in the claude-bridge fleet. Every message you receive arrives "
+            + "through the bridge, and the ONLY channel back to the sender is the bridge_reply MCP tool. "
+            + "Text you write in your terminal is NOT sent anywhere — the sender cannot see your screen, "
+            + "so an in-terminal answer is silently discarded. Therefore you MUST end EVERY turn by calling "
+            + "bridge_reply with `content` set to your complete response. This holds for every message without "
+            + "exception — tasks, questions, clarifications, acknowledgements, and ordinary back-and-forth "
+            + "conversation. Call bridge_reply exactly once, as the final action of your turn, with your full "
+            + "answer in `content`; never wait for confirmation first. If you end a turn without calling "
+            + "bridge_reply, the sender receives nothing and the exchange stalls.";
+
+    /**
+     * Tab numbers, counted per {@code role/profile} pair (CB-557).
+     *
+     * <p>Deliberately not {@link #nameSeq}. That counter is shared by every profile this launcher
+     * serves, because its job is to make herdr <em>agent names</em> unique. Reusing it for the tab
+     * label made the numbers global, so sibling tabs read {@code #4}, {@code #9}, {@code #17} — gaps
+     * that look like a member died. Counting per role+profile makes {@code dev: sonnet #2} mean the
+     * second sonnet dev, which is what a reader assumes it means.
+     *
+     * <p>Resets when the daemon restarts, and that is fine: the label is a human-facing hint, not an
+     * identity. Identity is {@link PeerHandle#id()}.
+     */
+    private final ConcurrentMap<String, AtomicLong> labelSeq = new ConcurrentHashMap<>();
+
+    private final long spawnReadyTimeoutMs; // 0 = disable gate (legacy non-blocking spawn)
+    private final LongSupplier nowMillis; // monotonic clock (injectable for tests)
+    private final Runnable sleeper; // sleep/wait hook (injectable for tests; never real-sleep in unit tests)
+
+    // Per-process token mixed into each peer name so a fresh process (nameSeq back at 0) cannot
+    // collide with same-profile peers that outlived a restart. See startUniquelyNamed.
+    private final String nameNonce = String.format("%06x", new SecureRandom().nextInt(1 << 24));
+
+    // CB-519: PeerHandle.id() is a host-unique opaque UUID, decoupled from the herdr pane id. The
+    // routing/registry key is the UUID; the herdr pane id is a launcher-private placement/teardown
+    // coordinate. This map bridges the two so stop(id) can resolve a host-unique key back to the
+    // exact pane it must tear down. The pane id is launcher-private (never the routing key) — see
+    // PeerHandle.id().
+    private final ConcurrentMap<String, String> paneByAgentId = new ConcurrentHashMap<>();
+    private final AtomicBoolean resetUnsupportedLogged = new AtomicBoolean();
+
+    /**
+     * @param namePrefix          label prefix for this peer kind (drives naming and reap)
+     * @param agents              herdr agent control (start, status, close)
+     * @param spaces              workspace / tab control (ensure, create, close)
+     * @param profiles            configured peer profiles
+     * @param defaultProfile      profile a no-argument spawn uses (nullable)
+     * @param env                 host env lookup (injectable for tests)
+     * @param spawnReadyTimeoutMs max ms to wait for injectable state (0 disables the gate)
+     * @param nowMillis           monotonic clock source (e.g. {@code System::currentTimeMillis})
+     * @param sleeper             sleep/wait hook (never called when the gate is disabled); the poll
+     *                            interval is baked into this hook, so the base needs no poll field
+     */
+    protected HerdrPeerLauncher(String namePrefix, AgentControl agents, WorkspaceControl spaces,
+                                Map<String, BridgedConfig.Profile> profiles, String defaultProfile,
+                                Function<String, String> env,
+                                long spawnReadyTimeoutMs,
+                                LongSupplier nowMillis, Runnable sleeper) {
+        this(namePrefix, agents, spaces, profiles, defaultProfile, env, spawnReadyTimeoutMs,
+                nowMillis, sleeper, null);
+    }
+
+    /**
+     * As above, plus the live {@code fleet} config (CB-557).
+     *
+     * @param fleet live fleet config, read once per spawn; {@code null} ⇒ default tab label and no
+     *              role charter. A separate constructor rather than a new parameter on the one
+     *              above, so every existing call site keeps the default without an edit.
+     */
+    protected HerdrPeerLauncher(String namePrefix, AgentControl agents, WorkspaceControl spaces,
+                                Map<String, BridgedConfig.Profile> profiles, String defaultProfile,
+                                Function<String, String> env,
+                                long spawnReadyTimeoutMs,
+                                LongSupplier nowMillis, Runnable sleeper,
+                                Supplier<BridgedConfig.Fleet> fleet) {
+        this.fleet = fleet;
+        this.namePrefix = namePrefix;
+        this.agents = agents;
+        this.spaces = spaces;
+        this.profiles = Map.copyOf(profiles);
+        this.defaultProfile = defaultProfile;
+        this.env = env;
+        this.spawnReadyTimeoutMs = spawnReadyTimeoutMs;
+        this.nowMillis = nowMillis;
+        this.sleeper = sleeper;
+    }
+
+    // --- adapter seams -------------------------------------------------------------------------
+
+    /**
+     * Build the peer-specific launch for {@code cfg}: the environment map and argv handed to herdr.
+     * Any subscription/guard check, MCP mount, and instruction injection happen here. The env map
+     * and argv are adapter-private; the base only places and starts what is returned.
+     */
+    protected abstract Launch buildLaunch(BridgedConfig.Profile cfg, LaunchSpec spec);
+
+    /** Direct transport access for peer-specific, non-turn control operations. */
+    protected final AgentControl agents() {
+        return agents;
+    }
+
+    /** Resolve the public peer id to the launcher's private herdr target. */
+    protected final String agentTarget(String id) {
+        return paneByAgentId.get(id);
+    }
+
+    @Override
+    public boolean clearContext(String id) {
+        if (resetUnsupportedLogged.compareAndSet(false, true)) {
+            log.warn("context reset is unsupported for peer kind {}; clearAfterTurn is a no-op",
+                    namePrefix);
+        }
+        return false;
+    }
+
+    /**
+     * A peer-specific launch: the herdr {@code env} map and {@code argv}, plus — for an adapter
+     * that carries durable session identity (CB-547a) — the peer's OWN session id
+     * ({@link PeerHandle#agentSessionId()}), known before the peer has written anything. Null for
+     * a launch that carries no identity.
+     */
+    protected record Launch(Map<String, String> env, List<String> argv, String agentSessionId) {
+
+        /** A launch without a discoverable agent session id (an adapter that carries none). */
+        Launch(Map<String, String> env, List<String> argv) {
+            this(env, argv, null);
+        }
+    }
+
+    /** All per-spawn values adapters may need, including the base-composed effective charter. */
+    protected record LaunchSpec(String sessionName, String resumeSessionId, MemberRole role, String charter) {
+    }
+
+    // --- profile surface -----------------------------------------------------------------------
+
+    /** The configured peer profile names (what {@code spawn(profile)} accepts). */
+    @Override
+    public Set<String> profiles() {
+        return profiles.keySet();
+    }
+
+    /** The parity-overlay file list for {@code profileName} (default list when unset). */
+    @Override
+    public List<String> parityOverlay(String profileName) {
+        String name = (profileName == null || profileName.isBlank()) ? defaultProfile : profileName;
+        if (name == null || name.isBlank()) {
+            return List.of();
+        }
+        BridgedConfig.Profile cfg = profiles.get(name);
+        return cfg == null ? List.of() : cfg.parityOverlay();
+    }
+
+    /** The profile a no-argument spawn uses, or {@code null} if none is configured. */
+    @Override
+    public String defaultProfile() {
+        return defaultProfile;
+    }
+
+    /** The configured profiles, for adapter capability decisions (e.g. any git-token grant). */
+    protected Collection<BridgedConfig.Profile> profileConfigs() {
+        return profiles.values();
+    }
+
+    /** Resolve {@code profileName} (null/blank → default) to its config, or throw with the options. */
+    protected BridgedConfig.Profile requireProfile(String profileName) {
+        String name = (profileName == null || profileName.isBlank()) ? defaultProfile : profileName;
+        if (name == null || name.isBlank()) {
+            throw new IllegalArgumentException("no default worker profile is configured — "
+                    + "pass a profile; configured: " + profiles.keySet());
+        }
+        BridgedConfig.Profile cfg = profiles.get(name);
+        if (cfg == null) {
+            throw new IllegalArgumentException("unknown worker profile '" + name
+                    + "' — configured: " + profiles.keySet());
+        }
+        return cfg;
+    }
+
+    // --- spawn ---------------------------------------------------------------------------------
+
+    /** A started peer plus the launch's agent-session id (the resume handle, or null). */
+    private record Spawned(Agent agent, String agentSessionId) {
+    }
+
+    /**
+     * Spawn a peer. {@code profileName} null/blank → the default profile. The working directory
+     * (CB-112) is resolved by {@link #resolveCwd}: an explicit {@code requestedCwd}, else the
+     * profile's configured {@code cwd}, else {@code callerCwd} (the primary's cwd, when the spawn
+     * came from the primary over MCP), else the daemon's cwd — never assumed to be {@code $HOME}.
+     * The adapter's {@link #buildLaunch} runs before any herdr call.
+     */
+    protected Agent spawnInternal(String profileName, String requestedCwd, String callerCwd) {
+        return spawnInternal(profileName, requestedCwd, callerCwd, null, null).agent();
+    }
+
+    /** Pre-CB-557 shape: no explicit role, so the tab is labelled as a {@code dev}. */
+    protected Spawned spawnInternal(String profileName, String requestedCwd, String callerCwd,
+                                    String sessionName, String resumeSessionId) {
+        return spawnInternal(profileName, requestedCwd, callerCwd, sessionName, resumeSessionId,
+                MemberRole.DEV);
+    }
+
+    /**
+     * Spawn a peer with session identity (CB-547a). The session values, role, and charter are
+     * threaded from the {@link SpawnRequest} into {@link #buildLaunch(BridgedConfig.Profile,
+     * LaunchSpec)}, and the launch's resolved agent-session id is returned alongside the agent so
+     * the caller can put it on the {@link PeerHandle}.
+     */
+    protected Spawned spawnInternal(String profileName, String requestedCwd, String callerCwd,
+                                    String sessionName, String resumeSessionId, MemberRole role) {
+        BridgedConfig.Profile cfg = requireProfile(profileName);
+        BridgedConfig.Fleet liveFleet = fleet == null ? null : fleet.get();
+        String roleCharter = liveFleet == null ? null : liveFleet.charterFor(role);
+        String replyCharter = cfg.hasMcp() ? REPLY_CHARTER : null;
+        String charter = roleCharter == null ? replyCharter
+                : replyCharter == null ? roleCharter : roleCharter + "\n\n" + replyCharter;
+        Launch launch = buildLaunch(cfg, new LaunchSpec(sessionName, resumeSessionId, role, charter));
+        String cwd = resolveCwd(requestedCwd, cfg, callerCwd);
+        Agent agent = cfg.tabPlacement()
+                ? spawnInTab(cfg, launch.env(), launch.argv(), cwd, role, liveFleet)
+                : spawnAsPane(cfg, launch.env(), launch.argv(), cwd);
+        return new Spawned(agent, launch.agentSessionId());
+    }
+
+    /**
+     * The next tab number for {@code role} on {@code profile}, starting at 1.
+     *
+     * <p>Starts at 1 rather than 0 because the number is read by a person: {@code "dev: sonnet #1"}
+     * is the first one, and {@code #0} invites the question of where {@code #1} went.
+     */
+    private long nextLabelSeq(MemberRole role, String profile) {
+        String key = (role == null ? "" : role.wireName()) + "/" + profile;
+        return labelSeq.computeIfAbsent(key, _ -> new AtomicLong()).incrementAndGet();
+    }
+
+    /**
+     * {@inheritDoc}
+     *
+     * <p>Delegates to {@link #spawnInternal} and wraps the resulting herdr {@link Agent} in a
+     * {@link WorkerHandle} whose {@link PeerHandle#id()} is a fresh <em>host-unique</em> opaque
+     * UUID (CB-519), deliberately decoupled from the herdr pane id: the id is the registry/routing
+     * key and must never collide across daemon processes on the same host, while the herdr pane id
+     * stays a launcher-private placement/teardown coordinate, remembered here so {@link #stop}
+     * can resolve the host-unique key back to its pane. When {@code spawnReadyTimeoutMs > 0},
+     * blocks until the peer's herdr status is injectable or the timeout elapses; on timeout the
+     * pane is closed (no orphan) and a {@link PeerUnreachableException} is thrown.
+     */
+    @Override
+    public PeerHandle spawn(SpawnRequest req) {
+        Spawned spawned = spawnInternal(req.profileName(), req.requestedCwd(), req.callerCwd(),
+                req.sessionName(), req.resumeSessionId(), req.role());
+        Agent agent = spawned.agent();
+        String paneId = agent.paneId();
+        if (spawnReadyTimeoutMs > 0) {
+            waitUntilInjectableOrThrow(paneId);
+        }
+        // CB-519: the handle id is a host-unique UUID; the herdr pane it maps to stays internal.
+        String id = UUID.randomUUID().toString();
+        paneByAgentId.put(id, paneId);
+        return new WorkerHandle(id, agent.terminalId(), requireProfile(req.profileName()).profile(),
+                req.sessionName(), spawned.agentSessionId());
+    }
+
+    @Override
+    public String effectiveCwd(SpawnRequest req) {
+        return effectiveCwd(req.profileName(), req.requestedCwd(), req.callerCwd());
+    }
+
+    /**
+     * CB-301: the effective working directory a spawn for {@code profileName} would use, without
+     * actually spawning.
+     */
+    private String effectiveCwd(String profileName, String requestedCwd, String callerCwd) {
+        return resolveCwd(requestedCwd, requireProfile(profileName), callerCwd);
+    }
+
+    /**
+     * CB-112 cwd resolution: spawn arg → profile config → the primary's cwd → the daemon's cwd.
+     * Never returns {@code null}/blank: {@code "."} (the daemon's own working directory) is the
+     * guaranteed last resort so a pathological environment with an unset {@code user.dir} still
+     * honours the "never assume {@code $HOME}" contract rather than letting herdr default the pane.
+     */
+    private static String resolveCwd(String requestedCwd, BridgedConfig.Profile cfg, String callerCwd) {
+        return firstNonBlank(requestedCwd, cfg.cwd(), callerCwd, System.getProperty("user.dir"), ".");
+    }
+
+    private static String firstNonBlank(String... values) {
+        for (String v : values) {
+            if (v != null && !v.isBlank()) return v;
+        }
+        return null;
+    }
+
+    /** Dedicated worker space → own tab (carrying cwd+env) → start the peer into the seed pane. */
+    private Agent spawnInTab(BridgedConfig.Profile cfg, Map<String, String> workerEnv,
+                             List<String> argv, String cwd, MemberRole role, BridgedConfig.Fleet liveFleet) {
+        Workspace space = spaces.ensureWorkspace(cfg.workspace());
+        Tab.Created tab = spaces.createTab(space.workspaceId(), cwd, workerEnv);
+        log.info("spawning {} profile={} space={} tab={} cwd={}",
+                namePrefix, cfg.profile(), space.workspaceId(), tab.tab().tabId(), cwd);
+
+        Started started;
+        try {
+            if (tab.rootPaneId() == null) {
+                // Protocol 19 starts the agent INTO the seed pane — without one there is nowhere
+                // to start, and a partial tab would be left behind.
+                throw new IllegalStateException("tab " + tab.tab().tabId()
+                        + " had no seed pane in the create response — cannot start a peer in it");
+            }
+            started = startUniquelyNamed(cfg, argv, tab.rootPaneId());
+        } catch (RuntimeException e) {
+            // The peer never started — don't leave the tab we just created orphaned.
+            // Best-effort cleanup; never let it mask the real spawn failure.
+            try {
+                spaces.closeTab(tab.tab().tabId());
+            } catch (RuntimeException cleanup) {
+                log.warn("failed to close orphaned tab {} after spawn error: {}",
+                        tab.tab().tabId(), cleanup.getMessage());
+            }
+            throw e;
+        }
+
+        // The peer is LIVE now, in the seed pane itself (no shell pane to drop — protocol 19).
+        // Labelling is cosmetic: it must not fail the spawn or orphan the running peer — on error
+        // we log and still return it so the caller gets its paneId and can tear it down.
+        tidy("label tab " + tab.tab().tabId(),
+                () -> spaces.renameTab(tab.tab().tabId(),
+                        cfg.renderTabLabel(
+                                liveFleet == null ? null : liveFleet.tabLabel(),
+                                role, nextLabelSeq(role, cfg.profile()))));
+        log.info("{} started pane={} tab={} terminal={}",
+                namePrefix, started.agent().paneId(), started.agent().tabId(), started.agent().terminalId());
+        return started.agent();
+    }
+
+    /** Run a best-effort post-start cleanup step, logging (not throwing) on failure. */
+    private void tidy(String what, Runnable step) {
+        try {
+            step.run();
+        } catch (RuntimeException e) {
+            log.warn("post-start step failed ({}) — peer is running regardless: {}", what, e.getMessage());
+        }
+    }
+
+    /** Legacy placement: split the currently-focused tab; the peer still starts in {@code cwd}. */
+    private Agent spawnAsPane(BridgedConfig.Profile cfg, Map<String, String> workerEnv,
+                              List<String> argv, String cwd) {
+        log.info("spawning {} (pane placement) profile={} cwd={} argv={}",
+                namePrefix, cfg.profile(), cwd, argv);
+        String paneId = spaces.splitPane(cwd, workerEnv);
+        if (paneId == null) {
+            throw new IllegalStateException("pane.split returned no pane — cannot start a peer");
+        }
+        Agent peer = startUniquelyNamed(cfg, argv, paneId).agent();
+        log.info("{} started pane={} terminal={}", namePrefix, peer.paneId(), peer.terminalId());
+        return peer;
+    }
+
+    /** A started peer together with the sequence its unique name/label used. */
+    private record Started(Agent agent, long seq) {
+    }
+
+    /**
+     * Start the peer under a unique herdr agent name. herdr requires each running agent's
+     * {@code name} to be distinct (a 2nd identical {@code name} fails {@code agent_name_taken}) —
+     * the exact case that makes multiple peers useful. The name is
+     * {@code <prefix>-<profile>-<nonce>-<seq>}: {@code seq} distinguishes peers within this process,
+     * and the per-process {@code nonce} keeps a fresh process (whose {@code seq} restarts at 0) from
+     * colliding with same-profile peers that outlived a restart. The retry is a belt-and-braces
+     * backstop for the astronomically unlikely nonce+seq clash; the name is a label only — herdr
+     * detects kind and status from terminal output, not from it.
+     */
+    private Started startUniquelyNamed(BridgedConfig.Profile cfg, List<String> argv, String paneId) {
+        // Protocol 19 resolves the executable from the agent kind (== namePrefix here), so
+        // argv[0] — the configured executable — is dropped and only the extra args are passed.
+        List<String> args = argv.isEmpty() ? argv : argv.subList(1, argv.size());
+        HerdrException last = null;
+        for (int attempt = 0; attempt < NAME_RETRIES; attempt++) {
+            long seq = nameSeq.incrementAndGet();
+            String name = namePrefix + "-" + cfg.profile() + "-" + nameNonce + "-" + seq;
+            try {
+                return new Started(startAwaitingShellPrompt(name, args, paneId), seq);
+            } catch (HerdrException e) {
+                if (!"agent_name_taken".equals(e.code())) throw e;
+                log.debug("peer name '{}' taken, retrying", name);
+                last = e;
+            }
+        }
+        throw last;
+    }
+
+    /** Start the agent into {@code paneId}, waiting out the seed shell's boot with the sleeper. */
+    private Agent startAwaitingShellPrompt(String name, List<String> args, String paneId) {
+        HerdrException busy = null;
+        for (int attempt = 0; attempt < SHELL_READY_RETRIES; attempt++) {
+            try {
+                return agents.start(name, namePrefix, args, paneId);
+            } catch (HerdrException e) {
+                if (!"agent_pane_busy".equals(e.code())) throw e;
+                log.debug("pane {} not at its shell prompt yet, retrying agent.start", paneId);
+                busy = e;
+                sleeper.run();
+            }
+        }
+        throw busy;
+    }
+
+    // --- discovery + reap ----------------------------------------------------------------------
+
+    /** All herdr-tracked agents — discovery for "what peers exist". */
+    @Override
+    public List<Agent> list() {
+        return agents.list();
+    }
+
+    /**
+     * Reap peer panes left behind by an earlier daemon process (CB-117). herdr keeps a peer's pane
+     * alive across a daemon restart <em>by design</em>, and that pane's id is held only by its
+     * spawner — so a peer whose owning process exited before issuing the matching teardown leaks
+     * with nothing tracking it. On boot we scan herdr for agents whose name matches our
+     * {@code <prefix>-<profile>-<nonce>-<seq>} scheme with a nonce <em>other</em> than this
+     * process's {@link #nameNonce}, and tear each one down (its pane and, via {@link #stop}, its
+     * now-empty dedicated tab). A current-nonce peer is ours and live, so it is left running; a
+     * user's own session carries no such name and is never touched. A peer from a <em>different</em>
+     * adapter (different prefix) is likewise never touched. Best-effort: a failed listing, or a
+     * failure to stop any one peer, is logged and never aborts startup.
+     *
+     * @return the number of orphaned peers reaped
+     */
+    @Override
+    public int reapOrphanWorkers() {
+        List<Agent> all;
+        try {
+            all = agents.list();
+        } catch (RuntimeException e) {
+            log.warn("orphan-peer reap skipped — agent.list failed: {}", e.getMessage());
+            return 0;
+        }
+        int reaped = 0;
+        for (Agent a : all) {
+            if (!isForeignWorker(namePrefix, a.name(), nameNonce)) continue;
+            try {
+                stop(a.paneId());
+                reaped++;
+                log.info("reaped orphan {} {} (pane={} tab={}) left by a prior daemon",
+                        namePrefix, a.name(), a.paneId(), a.tabId());
+            } catch (RuntimeException e) {
+                log.warn("could not reap orphan {} {} (pane={}): {}",
+                        namePrefix, a.name(), a.paneId(), e.getMessage());
+            }
+        }
+        if (reaped > 0) {
+            log.info("orphan-peer reap complete — {} stale {} peer(s) removed at startup", reaped, namePrefix);
+        }
+        return reaped;
+    }
+
+    /** The {@code <prefix>-<profile>-<nonce>-<seq>} name pattern; group 1 captures the 6-hex nonce. */
+    static Pattern workerNamePattern(String prefix) {
+        return Pattern.compile(prefix + "-.*-([0-9a-f]{6})-\\d+");
+    }
+
+    /**
+     * Whether {@code name} is a peer of kind {@code prefix} started by a <em>different</em> process
+     * than {@code currentNonce} — the reap predicate (CB-117). True only for the prefix's naming
+     * scheme with a foreign nonce: a non-peer name, a different adapter's name, or our own live
+     * nonce is excluded. Pure and package-private so the decision is unit-testable without herdr.
+     */
+    static boolean isForeignWorker(String prefix, String name, String currentNonce) {
+        String nonce = workerNonce(prefix, name);
+        return nonce != null && !nonce.equals(currentNonce);
+    }
+
+    /** The 6-hex nonce embedded in a {@code prefix} peer name, or {@code null} if not one. */
+    static String workerNonce(String prefix, String name) {
+        if (name == null) return null;
+        Matcher m = workerNamePattern(prefix).matcher(name);
+        return m.matches() ? m.group(1) : null;
+    }
+
+    /** This process's peer-name nonce (a label component only; exposed for reaper tests). */
+    String nameNonce() {
+        return nameNonce;
+    }
+
+    // --- teardown ------------------------------------------------------------------------------
+
+    /**
+     * Tear a peer down: close the pane, and close its tab <em>only</em> when the peer is that tab's
+     * sole occupant. The single-pane check is what makes this safe regardless of how the peer was
+     * placed (or a placement-config change across a restart): a pane-placement peer sitting in one
+     * of the user's shared tabs has siblings, so its tab is never closed — we only ever remove a
+     * tab we created to hold one peer.
+     *
+     * <p>{@code idOrPane} is the {@link PeerHandle#id()} of a peer this launcher spawned (CB-519's
+     * host-unique opaque UUID), resolved through {@link #paneByAgentId} to the pane it must tear
+     * down. An argument that is not one of our ids is treated as a raw herdr pane id — the
+     * {@link #reapOrphanWorkers() orphan-reap} and spawn-gate-timeout paths, plus any caller that
+     * passes a pane directly, keep working without an owning id.
+     *
+     * <p>Resolves the tab from the pane <em>before</em> closing it. An already-gone pane/tab
+     * (repeated DELETE, crashed peer) is treated as success; any other failure propagates so a
+     * genuinely failed teardown is not reported as done.
+     */
+    @Override
+    public void stop(String idOrPane) {
+        // Teardown knows only the pane, not which profile spawned it. Attempt tab cleanup when any
+        // profile uses tab placement (so the bridge may have created a dedicated peer tab); the
+        // single-occupant check below is what actually protects the user's shared tabs.
+        String paneId = paneByAgentId.remove(idOrPane);
+        if (paneId == null) {
+            paneId = idOrPane; // raw-pane fallback (reap, gate timeout, pane-addressed callers)
+        }
+        WorkspaceControl.PaneLocation loc = usesTabPlacement() ? spaces.locatePane(paneId) : null;
+        try {
+            agents.close(paneId);
+        } catch (HerdrException e) {
+            if (!isAlreadyGone(e)) throw e;
+            log.debug("pane.close({}) ignored — already gone: {}", paneId, e.getMessage());
+        }
+        if (loc != null && loc.tabPaneCount() == 1) {
+            spaces.closeTab(loc.tabId());
+        } else if (loc != null) {
+            log.debug("not closing tab {} — it holds {} panes (not a dedicated peer tab)",
+                    loc.tabId(), loc.tabPaneCount());
+        }
+    }
+
+    /** Whether any configured profile places peers in their own tab (so tabs may need cleanup). */
+    private boolean usesTabPlacement() {
+        return profiles.values().stream().anyMatch(BridgedConfig.Profile::tabPlacement);
+    }
+
+    /** True when a herdr error means the target is already gone (safe to treat as done). */
+    private static boolean isAlreadyGone(HerdrException e) {
+        return e.code() != null && e.code().endsWith("_not_found");
+    }
+
+    // --- spawn-readiness gate (CB-306) ---------------------------------------------------------
+
+    /**
+     * Poll {@link AgentControl#status} until the pane reports an injectable state or the configured
+     * timeout elapses. On timeout, close the pane (self-reap) and throw.
+     */
+    private void waitUntilInjectableOrThrow(String paneId) {
+        long deadline = nowMillis.getAsLong() + spawnReadyTimeoutMs;
+        while (nowMillis.getAsLong() < deadline) {
+            if (agents.status(paneId).injectable()) {
+                log.debug("peer pane={} reached injectable state", paneId);
+                return;
+            }
+            sleeper.run();
+        }
+        log.warn("peer pane={} did not become injectable within {}ms — closing", paneId, spawnReadyTimeoutMs);
+        stop(paneId);
+        throw new PeerUnreachableException(
+                "worker pane " + paneId + " did not reach injectable state within "
+                        + spawnReadyTimeoutMs + "ms");
+    }
+
+    /**
+     * A concrete {@link PeerHandle} wrapping herdr agent coordinates, the profile that spawned it,
+     * and the session identity the launch resolved (CB-547a): the bridge's logical name and the
+     * peer's own session id, both null when the spawn carried no identity.
+     */
+    private record WorkerHandle(String id, String terminalId, String profile,
+                                String sessionName, String agentSessionId) implements PeerHandle {
+    }
+
+    // --- shared helpers ------------------------------------------------------------------------
+
+    /** Put {@code k → v} only when {@code v} is present (non-null, non-blank). */
+    protected static void putIfPresent(Map<String, String> m, String k, String v) {
+        if (v != null && !v.isBlank()) {
+            m.put(k, v);
+        }
+    }
+
+    /** Host env lookup that tolerates an unconfigured (null/blank) var name — returns null then. */
+    protected String resolveEnv(String name) {
+        return (name == null || name.isBlank()) ? null : env.apply(name);
+    }
+
+    /**
+     * The parity-neutral git-forge token grant (CB-302): when {@code cfg} opts in via
+     * {@code gitTokenEnv} and the token resolves, inject {@code GITEA_TOKEN} plus its paired
+     * {@code GITEA_HOST}. Push over SSH is unaffected; the only incremental grant is PR-create.
+     * Peer-neutral, so every herdr adapter reuses it unchanged.
+     */
+    protected void applyGitToken(Map<String, String> workerEnv, BridgedConfig.Profile cfg) {
+        if (!cfg.hasGitToken()) {
+            return;
+        }
+        String gitToken = resolveEnv(cfg.gitTokenEnv());
+        if (gitToken != null) {
+            workerEnv.put("GITEA_TOKEN", gitToken);
+            putIfPresent(workerEnv, "GITEA_HOST", resolveEnv(cfg.gitHostEnv()));
+        }
+    }
+
+    /** A fresh mutable env map — the conventional starting point for {@link #buildLaunch}. */
+    /**
+     * Seed a worker's environment (CB-511): the daemon's own {@code PATH}, then the profile's
+     * {@code env:} entries.
+     *
+     * <p>Why this exists: bridged passes herdr an explicit env map, and herdr merges it into
+     * <em>its own</em> process environment. So before this, a worker inherited whatever PATH the
+     * herdr server happened to be started with — on this host, one from weeks earlier with no JDK
+     * and no Maven, which left workers unable to run the build they were being asked to run. The
+     * worker's toolchain must follow from configuration, not from how a long-lived daemon was
+     * launched.
+     *
+     * <p>Adapter-specific variables are layered on top of this by {@code buildLaunch} and therefore
+     * win. That ordering is deliberate and load-bearing: it stops a profile's {@code env:} from
+     * overriding {@code ANTHROPIC_BASE_URL} and slipping past {@link
+     * dev.ltms.bridged.guard.SubscriptionGuard}, which is checked against the profile's
+     * {@code baseUrl} and nothing else.
+     */
+    protected Map<String, String> baseEnv(BridgedConfig.Profile cfg) {
+        Map<String, String> workerEnv = new LinkedHashMap<>();
+        String path = env.apply("PATH");
+        if (path != null && !path.isBlank()) {
+            workerEnv.put("PATH", path);
+        }
+        if (cfg != null && cfg.env() != null) {
+            workerEnv.putAll(cfg.env());
+        }
+        return workerEnv;
+    }
+
+    /** Defensive copy of {@code argv} plus room to append launch flags. */
+    protected static List<String> mutableArgv(List<String> argv) {
+        return new ArrayList<>(argv);
+    }
+
+    /**
+     * Uninterruptible sleep — the production {@link #sleeper}. Tests supply their own no-op /
+     * fast-faking sleeper so they never real-sleep.
+     */
+    protected static void sleepUninterruptibly(long ms) {
+        try {
+            Thread.sleep(ms);
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+            // preserve the interrupt flag but continue — poll loops should not be aborted by an
+            // interrupt that was not meant for them.
+        }
+    }
+}

bridged/src/main/java/dev/ltms/bridged/member/OpenCodeLauncher.java

@@ -0,0 +1,459 @@
+package dev.ltms.bridged.member;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import dev.ltms.bridged.config.BridgedConfig;
+import dev.ltms.bridged.herdr.Agent;
+import dev.ltms.bridged.herdr.AgentControl;
+import dev.ltms.bridged.herdr.WorkspaceControl;
+import dev.ltms.bridged.peer.Capability;
+import dev.ltms.bridged.peer.PeerHandle;
+import dev.ltms.bridged.peer.SpawnRequest;
+
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.EnumSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Function;
+import java.util.function.LongSupplier;
+import java.util.function.Supplier;
+
+/**
+ * The {@link HerdrPeerLauncher} adapter for <strong>opencode</strong> — an open-source,
+ * provider-agnostic terminal coding agent. Its whole reason for existing is to prove the
+ * {@code PeerLauncher} SPI is genuinely provider-neutral: opencode shares none of Claude Code's
+ * private launch seams, yet reuses every line of shared transport in the base (tab/pane placement,
+ * the CB-306 readiness gate, unique naming + CB-117 reap, teardown, listing, cwd).
+ *
+ * <p>The divergences from {@link ClaudeCodeLauncher}, all confined to {@link #buildLaunch}:
+ * <ul>
+ *   <li><strong>No subscription boundary.</strong> opencode carries no {@code ANTHROPIC_BASE_URL}
+ *       and there is no {@link dev.ltms.bridged.guard.SubscriptionGuard} — the guard is a
+ *       Claude-private concern, not part of the SPI. opencode reads the operator's own provider
+ *       credentials from its global {@code auth.json}; the bridge injects none.</li>
+ *   <li><strong>File-based MCP mount + instructions.</strong> opencode has no inline
+ *       {@code --mcp-config}/{@code --append-system-prompt}. Instead the bridge writes an ephemeral
+ *       {@code opencode.json} that declares the bridge as a {@code remote} MCP server and lists a
+ *       member-charter file under {@code instructions}, then points the worker at it with
+ *       {@code OPENCODE_CONFIG}. This is the one place the launcher touches disk — Claude never did.</li>
+ *   <li><strong>Model as a flag.</strong> the {@code provider/model} selector is passed as
+ *       {@code -m}, not an env var.</li>
+ *   <li><strong>{@code opencode} name prefix</strong> so reap matches {@code opencode-*} panes and
+ *       never another adapter's.</li>
+ * </ul>
+ */
+public final class OpenCodeLauncher extends HerdrPeerLauncher {
+
+    /** Label prefix for this adapter's herdr agent names (drives naming + orphan reap). */
+    private static final String NAME_PREFIX = "opencode";
+
+    /** Writer for the generated {@code opencode.json}. */
+    private static final ObjectMapper JSON = new ObjectMapper();
+
+    /** Root under which per-spawn opencode config dirs are created (injectable for tests). */
+    private final Path configRoot;
+
+    /**
+     * Session discovery against opencode's on-disk storage ({@link OpenCodeSessionDiscovery}) —
+     * the one seam that knows opencode's private session-file layout. Its root is injectable for
+     * tests so they never touch the operator's real {@code ~/.local/share/opencode}.
+     */
+    private final OpenCodeSessionDiscovery discovery;
+
+    /**
+     * Production constructor — disables the spawn-ready gate ({@code spawnReadyTimeoutMs == 0}) so it
+     * matches the legacy non-blocking spawn semantics. Config dirs are created under the JVM temp dir.
+     */
+    public OpenCodeLauncher(AgentControl agents, WorkspaceControl spaces,
+                            Map<String, BridgedConfig.Profile> profiles, String defaultProfile,
+                            Function<String, String> env) {
+        this(agents, spaces, profiles, defaultProfile, env, 0,
+                System::currentTimeMillis, () -> sleepUninterruptibly(300),
+                defaultConfigRoot(), defaultDiscoveryRoot());
+    }
+
+    /**
+     * Production constructor with the spawn-ready gate enabled. Polls {@code agents.status()} until
+     * the pane reports an injectable state or {@code spawnReadyTimeoutMs} elapses.
+     */
+    public OpenCodeLauncher(AgentControl agents, WorkspaceControl spaces,
+                            Map<String, BridgedConfig.Profile> profiles, String defaultProfile,
+                            Function<String, String> env,
+                            long spawnReadyTimeoutMs, long spawnReadyPollMs) {
+        this(agents, spaces, profiles, defaultProfile, env,
+                spawnReadyTimeoutMs, spawnReadyPollMs, null);
+    }
+
+    /**
+     * Production constructor carrying the fleet-wide tab-label template (CB-557). The template comes
+     * from {@code fleet.tabLabel}, which a profile cannot know because it names the member's
+     * <em>role</em>; a profile may still override it with its own {@code tabLabel}.
+     */
+    public OpenCodeLauncher(AgentControl agents, WorkspaceControl spaces,
+                            Map<String, BridgedConfig.Profile> profiles, String defaultProfile,
+                            Function<String, String> env,
+                            long spawnReadyTimeoutMs, long spawnReadyPollMs,
+                            Supplier<BridgedConfig.Fleet> fleet) {
+        this(agents, spaces, profiles, defaultProfile, env, spawnReadyTimeoutMs,
+                System::currentTimeMillis, () -> sleepUninterruptibly(spawnReadyPollMs),
+                defaultConfigRoot(), defaultDiscoveryRoot(), fleet);
+    }
+
+    /**
+     * Full testability constructor. Every injectable collaborator is explicit so unit tests supply a
+     * fake clock ({@code nowMillis}), poll-loop wait ({@code sleeper}), and a temp {@code configRoot}
+     * they can inspect the generated {@code opencode.json}/charter under.
+     *
+     * @param agents              herdr agent control (start, status, close)
+     * @param spaces              workspace / tab control (ensure, create, close)
+     * @param profiles            configured worker profiles
+     * @param defaultProfile      profile a no-argument spawn uses (nullable)
+     * @param env                 host env lookup (injectable for tests)
+     * @param spawnReadyTimeoutMs max ms to wait for injectable state (0 disables the gate)
+     * @param nowMillis           monotonic clock source (e.g. {@code System::currentTimeMillis})
+     * @param sleeper             sleep/wait hook (encodes the poll interval; never called when the
+     *                            gate is disabled)
+     * @param configRoot          existing directory under which per-spawn config dirs are created
+     * @param discoveryRoot       opencode's on-disk storage root to scan for session records
+     *                            (injectable for tests; opencode's layout is matched at
+     *                            {@link OpenCodeSessionDiscovery})
+     */
+    public OpenCodeLauncher(AgentControl agents, WorkspaceControl spaces,
+                            Map<String, BridgedConfig.Profile> profiles, String defaultProfile,
+                            Function<String, String> env,
+                            long spawnReadyTimeoutMs,
+                            LongSupplier nowMillis, Runnable sleeper,
+                            Path configRoot, Path discoveryRoot) {
+        this(agents, spaces, profiles, defaultProfile, env, spawnReadyTimeoutMs,
+                nowMillis, sleeper, configRoot, discoveryRoot, null);
+    }
+
+    /**
+     * Full testability constructor, plus the fleet-wide tab-label template (CB-557).
+     *
+     * @param fleet live fleet config, read once for each spawn
+     */
+    public OpenCodeLauncher(AgentControl agents, WorkspaceControl spaces,
+                            Map<String, BridgedConfig.Profile> profiles, String defaultProfile,
+                            Function<String, String> env,
+                            long spawnReadyTimeoutMs,
+                            LongSupplier nowMillis, Runnable sleeper,
+                            Path configRoot, Path discoveryRoot,
+                            Supplier<BridgedConfig.Fleet> fleet) {
+        super(NAME_PREFIX, agents, spaces, profiles, defaultProfile, env,
+                spawnReadyTimeoutMs, nowMillis, sleeper, fleet);
+        this.configRoot = configRoot;
+        this.discovery = new OpenCodeSessionDiscovery(discoveryRoot);
+    }
+
+    private static Path defaultConfigRoot() {
+        return Path.of(System.getProperty("java.io.tmpdir"));
+    }
+
+    /** The default opencode storage root: {@code ~/.local/share/opencode} (the XDG data dir). */
+    private static Path defaultDiscoveryRoot() {
+        return Path.of(System.getProperty("user.home"), ".local", "share", "opencode");
+    }
+
+    /**
+     * {@inheritDoc}
+     *
+     * <p>Builds the opencode launch: no {@code ANTHROPIC_*} and no guard (opencode reads its own
+     * provider credentials); when the profile mounts the bridge MCP or has a member charter, generate an ephemeral
+     * {@code opencode.json} (remote MCP server + member-charter instructions) and point the worker at
+     * it via {@code OPENCODE_CONFIG}; carry the parity-neutral git-forge grant; and select the model
+     * with {@code -m}.
+     */
+    @Override
+    protected Launch buildLaunch(BridgedConfig.Profile cfg, LaunchSpec spec) {
+        Map<String, String> workerEnv = baseEnv(cfg);
+        // A config file is needed for the bridge MCP mount, a member charter, or a pinned endpoint (CB-508).
+        if (cfg.hasMcp() || spec.charter() != null || hasCustomProvider(cfg)) {
+            workerEnv.put("OPENCODE_CONFIG", writeConfig(cfg, spec.charter()).toString());
+        }
+        applyGitToken(workerEnv, cfg);
+        return new Launch(workerEnv,
+                argvWithResume(argvWithModel(argvWithAuto(cfg), cfg), spec.resumeSessionId()));
+    }
+
+    /**
+     * True when this profile pins its own OpenAI-compatible endpoint (CB-508) rather than using
+     * whatever provider opencode resolves by default.
+     *
+     * <p>Note this reuses {@code baseUrl}, the same field the Claude adapter injects as
+     * {@code ANTHROPIC_BASE_URL} — but it does <em>not</em> go through {@code SubscriptionGuard}.
+     * That asymmetry is deliberate and safe: the guard exists to stop a worker borrowing the
+     * primary's Anthropic subscription, and an opencode process has no Anthropic credential path
+     * at all. Pointing it at a local vLLM cannot leak the subscription.
+     */
+    private static boolean hasCustomProvider(BridgedConfig.Profile cfg) {
+        return cfg.baseUrl() != null && !cfg.baseUrl().isBlank();
+    }
+
+    /**
+     * The launch argv plus the unconditional {@code --auto} flag, which auto-approves the
+     * permissions opencode does not explicitly deny. It is unconditional, not a preference: a
+     * spawned peer has no human at its pane — the bridge spawned it — so one that stops at an
+     * approval prompt is a wedged agent, indistinguishable from a legitimate mid-turn wait and
+     * unable to end its turn with {@code bridge_reply}. opencode's own help calls this
+     * "dangerous!", but the blast radius here is already bounded by design: a worker runs in its
+     * own git worktree on its own branch, is off-subscription, and cannot merge — the lead is the
+     * gate.
+     */
+    private List<String> argvWithAuto(BridgedConfig.Profile cfg) {
+        List<String> argv = mutableArgv(cfg.argv());
+        argv.add("--auto");
+        return argv;
+    }
+
+    /**
+     * The launch argv plus, on a resumed spawn, opencode's {@code -s <id>} flag to continue a prior
+     * conversation by its session id. {@code -s, --session <id>} resumes an existing session; on a
+     * fresh spawn (no resume target) no flag is added, letting opencode start a brand-new session.
+     * The id comes from the base launch spec.
+     */
+    private List<String> argvWithResume(List<String> argv, String id) {
+        if (id == null || id.isBlank()) {
+            return argv;
+        }
+        List<String> withResume = mutableArgv(argv);
+        withResume.add("-s");
+        withResume.add(id);
+        return withResume;
+    }
+
+    /** The launch argv plus, when a model is configured, the opencode {@code -m provider/model} flag. */
+    private List<String> argvWithModel(List<String> argv, BridgedConfig.Profile cfg) {
+        if (cfg.model() != null && !cfg.model().isBlank()) {
+            argv.add("-m");
+            argv.add(cfg.model());
+        }
+        return argv;
+    }
+
+    /**
+     * Write an ephemeral {@code opencode.json} (and the member-charter file it references) into a
+     * fresh per-spawn directory under {@link #configRoot}, and return the config file's path for
+     * {@code OPENCODE_CONFIG}. The dir is unique per spawn so concurrent workers never race on it;
+     * it is best-effort cleaned on JVM exit (worker config is disposable — regenerated every spawn).
+     */
+    private Path writeConfig(BridgedConfig.Profile cfg, String charterText) {
+        try {
+            Path dir = Files.createTempDirectory(configRoot, "bridged-opencode-");
+            dir.toFile().deleteOnExit();
+
+            ObjectNode root = JSON.createObjectNode();
+            root.put("$schema", "https://opencode.ai/config.json");
+            // CB-523, opencode side: a worker that runs out of context dies mid-turn, and its reply
+            // — the entire point of the turn — is lost with it. Auto-compaction is therefore not an
+            // operator preference for a bridged worker, it is a condition of the turn contract.
+            //
+            // Stated deliberately even though it is redundant today: OPENCODE_CONFIG is MERGED over
+            // ~/.config/opencode/config.json rather than replacing it, so a worker already inherits
+            // an `auto: true` set at home. We do not want that inheritance to be what the guarantee
+            // rests on — the home file is outside this repo, differs per machine, and is not ours.
+            //
+            // Know the cost before removing it: this key WINS over the home config (verified — an
+            // OPENCODE_CONFIG value overrides the home value, it does not defer to it), so an
+            // operator who sets `compaction.auto: false` at home cannot turn it off for bridged
+            // workers. That is the intended trade for peers we spawn and whose turns we must land;
+            // if per-profile control is ever wanted, add a profile knob rather than dropping this.
+            root.putObject("compaction").put("auto", true);
+
+            if (charterText != null) {
+                Path charter = dir.resolve("member-charter.md");
+                Files.writeString(charter, charterText);
+                charter.toFile().deleteOnExit();
+
+                root.putArray("instructions").add(charter.toAbsolutePath().toString());
+            }
+
+            if (cfg.hasMcp()) {
+                ObjectNode bridge = root.putObject("mcp").putObject("bridge");
+                bridge.put("type", "remote");
+                bridge.put("url", cfg.mcpUrl());
+                bridge.put("enabled", true);
+            }
+            if (hasCustomProvider(cfg)) {
+                addCustomProvider(root, cfg);
+            }
+
+            Path cfgFile = dir.resolve("opencode.json");
+            // Built with Jackson rather than string concatenation: the provider block is nested and
+            // carries operator-supplied values (URL, model id, api key), so escaping must be real.
+            Files.writeString(cfgFile, JSON.writerWithDefaultPrettyPrinter().writeValueAsString(root));
+            cfgFile.toFile().deleteOnExit();
+            return cfgFile;
+        } catch (IOException e) {
+            throw new UncheckedIOException(
+                    "cannot write opencode config for profile " + cfg.profile(), e);
+        }
+    }
+
+    /**
+     * Declare a custom OpenAI-compatible provider so the worker talks to a pinned endpoint (a local
+     * vLLM, say) instead of opencode's default gateway (CB-508).
+     *
+     * <p>The provider id comes from the {@code provider/model} selector in {@code model:}, so one
+     * field drives both the declaration and the {@code -m} flag and they cannot drift apart.
+     */
+    private void addCustomProvider(ObjectNode root, BridgedConfig.Profile cfg) {
+        String[] parts = splitModelSelector(cfg);
+        String providerId = parts[0];
+        String modelId = parts[1];
+
+        ObjectNode provider = root.putObject("provider").putObject(providerId);
+        provider.put("npm", "@ai-sdk/openai-compatible");
+        provider.put("name", providerId + " (bridged)");
+
+        ObjectNode options = provider.putObject("options");
+        options.put("baseURL", openAiBaseUrl(cfg.baseUrl()));
+        // vLLM and friends usually ignore the key, but the AI SDK still requires a non-empty one.
+        String token = resolveEnv(cfg.tokenEnv());
+        options.put("apiKey", (token == null || token.isBlank()) ? "bridged-local-noauth" : token);
+
+        provider.putObject("models").putObject(modelId).put("name", modelId);
+    }
+
+    /**
+     * Split {@code model:} into its {@code provider} and {@code model} halves. A pinned endpoint
+     * needs both, so a bare model name is rejected loudly rather than silently falling back to the
+     * default gateway — a worker quietly talking to the wrong endpoint is the failure this avoids.
+     */
+    private static String[] splitModelSelector(BridgedConfig.Profile cfg) {
+        String model = cfg.model();
+        int slash = model == null ? -1 : model.indexOf('/');
+        if (model == null || model.isBlank() || slash <= 0 || slash == model.length() - 1) {
+            throw new IllegalArgumentException(
+                    "profile " + cfg.profile() + " sets baseUrl (a pinned opencode endpoint) so"
+                            + " model: must be \"<provider>/<model>\", e.g."
+                            + " \"local-vllm/deepseek-v4-flash\"; got "
+                            + (model == null ? "null" : '"' + model + '"'));
+        }
+        return new String[]{model.substring(0, slash), model.substring(slash + 1)};
+    }
+
+    /**
+     * The OpenAI-compatible base URL for {@code baseUrl}. A bare {@code host:port} gets {@code /v1}
+     * appended (where these servers put the API); a URL that already carries a path is taken as-is,
+     * so an endpoint mounted somewhere unusual is still reachable.
+     */
+    private static String openAiBaseUrl(String baseUrl) {
+        String trimmed = baseUrl.trim();
+        while (trimmed.endsWith("/")) {
+            trimmed = trimmed.substring(0, trimmed.length() - 1);
+        }
+        int schemeEnd = trimmed.indexOf("://");
+        String afterScheme = schemeEnd < 0 ? trimmed : trimmed.substring(schemeEnd + 3);
+        return afterScheme.contains("/") ? trimmed : trimmed + "/v1";
+    }
+
+    /** Add lazy on-disk session discovery to the base handle. */
+    @Override
+    public PeerHandle spawn(SpawnRequest req) {
+        PeerHandle inner = super.spawn(req);
+        return new SessionAwareHandle(inner, discovery, effectiveCwd(req));
+    }
+
+    /**
+     * A {@link PeerHandle} that delegates everything to the base's worker handle but resolves
+     * {@link #agentSessionId()} lazily through opencode session discovery. Delegate-only, so the
+     * base's id/terminalId/profile semantics (CB-519's host-unique routing key, herdr coordinates)
+     * are untouched — only the opencode-specific identity answer is added. {@code sessionName()}
+     * stays null: opencode has no display-name seam, so the logical name lives only in the bridge's
+     * roster (see the SESSION_NAME capability).
+     */
+    private static final class SessionAwareHandle implements PeerHandle {
+        private final PeerHandle delegate;
+        private final OpenCodeSessionDiscovery discovery;
+        private final String cwd;
+
+        SessionAwareHandle(PeerHandle delegate, OpenCodeSessionDiscovery discovery, String cwd) {
+            this.delegate = delegate;
+            this.discovery = discovery;
+            this.cwd = cwd;
+        }
+
+        @Override
+        public String id() {
+            return delegate.id();
+        }
+
+        @Override
+        public String terminalId() {
+            return delegate.terminalId();
+        }
+
+        @Override
+        public String profile() {
+            return delegate.profile();
+        }
+
+        @Override
+        public String sessionName() {
+            return delegate.sessionName();
+        }
+
+        @Override
+        public String agentSessionId() {
+            // Lazy + retried, never a spawn-time blocker: opencode writes the session record only
+            // when the session is first persisted, so null here is the correct interim answer and
+            // the caller re-calls later (each call re-scans, picking up a record that has since
+            // appeared).
+            return discovery.sessionIdForDirectory(cwd);
+        }
+    }
+
+    // --- Agent-returning convenience spawns (used by callers/tests that want the herdr Agent) ---
+
+    /** Spawn a worker for the default profile in the resolved default cwd. */
+    public Agent spawn() {
+        return spawnInternal(null, null, null);
+    }
+
+    /** Spawn a worker for a named profile (null → default) in the resolved default cwd. */
+    public Agent spawn(String profileName) {
+        return spawnInternal(profileName, null, null);
+    }
+
+    /** Spawn a worker for a named profile with an explicit requested/caller cwd (CB-112). */
+    public Agent spawn(String profileName, String requestedCwd, String callerCwd) {
+        return spawnInternal(profileName, requestedCwd, callerCwd);
+    }
+
+    // --- capabilities --------------------------------------------------------------------------
+
+    @Override
+    public Set<Capability> capabilities() {
+        Set<Capability> caps = EnumSet.of(Capability.MID_TURN_ASK, Capability.WORKTREE,
+                Capability.ORPHAN_REAP, Capability.SESSION_RESUME);
+        if (hasGitTokenProfile()) {
+            caps.add(Capability.SELF_PR);
+        }
+        // Deliberately NOT SESSION_NAME: opencode has no display-name flag, so the bridge's logical
+        // name can't surface in the peer's own UI — declaring the capability would hide that
+        // asymmetry rather than make it honest. For opencode the name lives only in the bridge's
+        // roster (see PeerHandle.sessionName() returning null).
+        return Set.copyOf(caps);
+    }
+
+    /** Whether any configured profile opts into a git-forge token (required for {@link Capability#SELF_PR}). */
+    private boolean hasGitTokenProfile() {
+        return profileConfigs().stream().anyMatch(BridgedConfig.Profile::hasGitToken);
+    }
+
+    // --- CB-117 reap predicate (opencode prefix), kept for direct unit testing -----------------
+
+    /**
+     * Whether {@code name} is an opencode bridge worker started by a <em>different</em> process than
+     * {@code currentNonce}. A thin {@code opencode}-prefix binding of
+     * {@link HerdrPeerLauncher#isForeignWorker(String, String, String)}.
+     */
+    static boolean isForeignWorker(String name, String currentNonce) {
+        return HerdrPeerLauncher.isForeignWorker(NAME_PREFIX, name, currentNonce);
+    }
+}

bridged/src/main/java/dev/ltms/bridged/member/OpenCodeSessionDiscovery.java

@@ -0,0 +1,122 @@
+package dev.ltms.bridged.member;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.stream.Stream;
+
+/**
+ * Resolves the opencode session id for a bridged worker from opencode's on-disk storage — the
+ * only place this adapter touches opencode's private layout, and deliberately the <em>only</em>
+ * class that does.
+ *
+ * <p><strong>Why this is isolated behind one seam.</strong> The layout is version-coupled and not a
+ * stable contract: opencode writes one JSON file per session under
+ * {@code <storageRoot>/session/<projectID>/<ses_*.json>}, and each record carries a
+ * {@code "version"} field (e.g. {@code "1.1.31"}), so the exact directory shape, file naming, and
+ * field names can move between opencode releases. opencode also ships a headless HTTP server that
+ * may supersede file scanning entirely. Everything this adapter knows about that private storage —
+ * its shape, naming, and field names — lives here, so a layout change, or a switch to the HTTP
+ * server, changes exactly one class and nothing in {@link OpenCodeLauncher}.
+ *
+ * <p>The determinism that makes this useful is structural, not a guess: every bridged worker runs
+ * in its own unique git worktree, so the record's {@code directory} (its project root) equals the
+ * worker's cwd identifies <em>its</em> session unambiguously. We match on {@code directory} rather
+ * than diffing {@code opencode session list} before/after — that races under concurrent spawns, and
+ * the CLI listing does not even show the directory.
+ *
+ * <p>All reads are best-effort and never throw: a missing or unreadable storage root, a record that
+ * fails to parse, or a directory with no record yet all yield {@code null}, and the caller (the
+ * session handle) treats that as "identity not resolved yet" and retries later.
+ */
+final class OpenCodeSessionDiscovery {
+
+    private final Path storageRoot;   // e.g. ~/.local/share/opencode (injectable for tests)
+    private final ObjectMapper json;
+
+    OpenCodeSessionDiscovery(Path storageRoot) {
+        this.storageRoot = storageRoot;
+        this.json = new ObjectMapper();
+    }
+
+    /**
+     * The opencode session id whose record references {@code directory} (the worker's cwd), or
+     * {@code null} when no record matches yet. When several records share the directory — e.g.
+     * repeated spawns into the same worktree — the <em>most recently modified</em> one wins: it is
+     * the session the pane most likely corresponds to.
+     *
+     * <p>Never throws: a missing {@code storageRoot}, an unreadable/malformed record, or a
+     * directory that has not been persisted yet all resolve to {@code null} rather than failing a
+     * spawn. A bridged worker's session record is written lazily (when the session is first
+     * persisted), so {@code null} here is the normal answer right after the pane is ready, and the
+     * caller retries later.
+     *
+     * @param directory the worker's cwd, as resolved for this spawn
+     * @return the matching session id, or {@code null} if none is known yet
+     */
+    String sessionIdForDirectory(String directory) {
+        if (directory == null || directory.isBlank()) {
+            return null;
+        }
+        Path sessionRoot = storageRoot.resolve("session");
+        if (!Files.isDirectory(sessionRoot)) {
+            return null;
+        }
+        String best = null;
+        long bestMtime = Long.MIN_VALUE;
+        try (Stream<Path> projectDirs = Files.list(sessionRoot)) {
+            for (Path projectDir : projectDirs.filter(Files::isDirectory).toList()) {
+                try (Stream<Path> records = Files.list(projectDir)) {
+                    for (Path record : records.toList()) {
+                        String id = matchId(record, directory);
+                        if (id == null) {
+                            continue;
+                        }
+                        long mtime = lastModifiedEpochMillis(record);
+                        if (mtime > bestMtime) {
+                            bestMtime = mtime;
+                            best = id;
+                        }
+                    }
+                } catch (IOException ignored) {
+                    // one project dir unreadable — skip it; another may still match
+                }
+            }
+        } catch (IOException ignored) {
+            // storage root vanished or became unreadable — "no session known yet"
+            return null;
+        }
+        return best;
+    }
+
+    /**
+     * The record's session id when it references {@code directory}, else {@code null}. A record
+     * that is not JSON, lacks {@code id}/{@code directory}, or points at a different directory is
+     * simply not our session; a malformed one is skipped, never fatal.
+     */
+    private String matchId(Path record, String directory) {
+        try {
+            JsonNode node = json.readTree(record.toFile());
+            JsonNode id = node == null ? null : node.get("id");
+            JsonNode dir = node == null ? null : node.get("directory");
+            if (id == null || dir == null || !directory.equals(dir.asText())) {
+                return null;
+            }
+            return id.asText();
+        } catch (IOException e) {
+            return null;
+        }
+    }
+
+    /** The record's last-modified epoch ms, or {@code Long.MIN_VALUE} if unreadable (never wins). */
+    private static long lastModifiedEpochMillis(Path record) {
+        try {
+            return Files.getLastModifiedTime(record).toMillis();
+        } catch (IOException e) {
+            return Long.MIN_VALUE;
+        }
+    }
+}

bridged/src/main/java/dev/ltms/bridged/metrics/BridgedMetrics.java

@@ -0,0 +1,101 @@
+package dev.ltms.bridged.metrics;
+
+import dev.ltms.bridged.msg.ReplyInbox;
+import dev.ltms.bridged.session.SessionManager;
+import dev.ltms.bridged.session.MemberSession;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+/**
+ * The daemon's metric definitions (CB-502) — one place where every series is named, described, and
+ * (for gauges) bound to live state.
+ *
+ * <p>The set is deliberately small: each series maps to a failure mode this project has actually
+ * hit, not to whatever was easy to count. The two worth watching in practice are
+ * {@code bridged_sends_total{outcome="completion_fallback"}} — a rising share means turn detection
+ * is degrading, the CB-115/116/118 failure family — and
+ * {@code bridged_push_nudges_total{outcome="exhausted"}}, which means the primary stopped draining
+ * its inbox and CB-307's active push gave up.
+ */
+public final class BridgedMetrics {
+
+    /** Counter: delegated sends by terminal outcome. */
+    public static final String SENDS = "bridged_sends_total";
+    /** Counter: worker replies by the path that carried them (rendezvous vs stranded-to-inbox). */
+    public static final String REPLIES = "bridged_replies_total";
+    /** Counter: push-loop nudges to the primary, by outcome. */
+    public static final String PUSH_NUDGES = "bridged_push_nudges_total";
+    /** Counter: idle-lead heartbeat nudges to the lead, by outcome (CB-551). */
+    public static final String HEARTBEAT_NUDGES = "bridged_lead_heartbeat_nudges_total";
+    /** Counter: spawn attempts by peer kind and outcome. */
+    public static final String SPAWNS = "bridged_spawns_total";
+    /** Counter: herdr socket calls by method and outcome. */
+    public static final String HERDR_CALLS = "bridged_herdr_calls_total";
+    /** Counter: rejected requests by reason (CB-501). */
+    public static final String AUTH_FAILURES = "bridged_auth_failures_total";
+    /** Gauge: session census by lifecycle state. */
+    public static final String SESSIONS = "bridged_sessions";
+    /** Gauge: undrained replies held per target. */
+    public static final String INBOX_DEPTH = "bridged_inbox_depth";
+
+    private BridgedMetrics() {
+    }
+
+    /**
+     * Build the registry with its help text and live gauges bound.
+     *
+     * @param sessions the authoritative session registry (census gauge)
+     * @param inbox    the reply inbox; only used for a depth gauge when it can be inspected
+     */
+    public static Metrics create(SessionManager sessions, ReplyInbox inbox) {
+        Metrics m = new Metrics();
+
+        m.describe(SENDS, "counter",
+                "Delegated sends by terminal outcome (replied|completion_fallback|timeout|failed).");
+        m.describe(REPLIES, "counter",
+                "Worker replies by delivery path (rendezvous=resolved an open send, inbox=stranded and held).");
+        m.describe(PUSH_NUDGES, "counter",
+                "CB-307 push-loop nudges to the primary (delivered|exhausted).");
+        m.describe(HEARTBEAT_NUDGES, "counter",
+                "CB-551 idle-lead heartbeat nudges (delivered|failed|exhausted). Quiet-cap exhaustion "
+                        + "means the lead idled with nothing pending and was told to stand down.");
+        m.describe(SPAWNS, "counter",
+                "Worker spawn attempts by peer kind and outcome (ready|timeout|guard_rejected).");
+        m.describe(HERDR_CALLS, "counter",
+                "herdr socket calls by method and outcome — the dependency everything else rests on.");
+        m.describe(AUTH_FAILURES, "counter",
+                "Requests refused by CB-501/505 (unauthenticated|forbidden).");
+        m.describe(SESSIONS, "gauge",
+                "Registered worker sessions by lifecycle state.");
+        m.describe(INBOX_DEPTH, "gauge",
+                "Replies held for a target that the primary has not drained. Steady state is 0; "
+                        + "a target stuck above 0 means CB-307 delivery is not completing.");
+
+        // One gauge per state so a scrape shows the whole census even when a state is empty —
+        // an absent series and a zero series read very differently on a dashboard.
+        for (MemberSession.State state : MemberSession.State.values()) {
+            String label = state.name().toLowerCase();
+            m.gauge(SESSIONS, () -> countIn(sessions, state), "state", label);
+        }
+
+        // Depth is per live session, so the label set is only known at scrape time. peek() is the
+        // port's non-destructive read — scraping metrics must never ack a reply out of the inbox.
+        m.collector(INBOX_DEPTH, "target", () -> {
+            Map<String, Number> depths = new LinkedHashMap<>();
+            for (MemberSession s : sessions.roster()) {
+                String target = s.terminalId();
+                if (target == null) {
+                    continue;
+                }
+                depths.put(target, inbox.peek(target).size());
+            }
+            return depths;
+        });
+        return m;
+    }
+
+    private static long countIn(SessionManager sessions, MemberSession.State state) {
+        return sessions.roster().stream().filter(s -> s.state() == state).count();
+    }
+}

bridged/src/main/java/dev/ltms/bridged/metrics/Metrics.java

@@ -0,0 +1,181 @@
+package dev.ltms.bridged.metrics;
+
+import java.util.Map;
+import java.util.NavigableMap;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentSkipListMap;
+import java.util.concurrent.atomic.LongAdder;
+import java.util.function.Supplier;
+
+/**
+ * The daemon's metric registry and Prometheus text renderer (CB-502).
+ *
+ * <p>Deliberately dependency-free. The roadmap's tech-stack table specified Micrometer, but this
+ * pom already carries an unusual reconciliation burden (a hand-pinned {@code jackson-annotations}
+ * to make the MCP SDK's Jackson 3 coexist with our Jackson 2, a Jetty BOM import to stop version
+ * skew, and four documented accepted-CVE advisories), and the dependency CVE gate this project
+ * mandates could not be run when this landed. The metric set is small and fully known, and
+ * Prometheus text exposition is a stable, well-specified format — so the registry is ~100 lines
+ * here instead of a new transitive tree. {@code GET /metrics} is the swap seam if Micrometer's
+ * ecosystem is ever wanted.
+ *
+ * <p>Thread-safe: counters are {@link LongAdder} (built for contended increment), gauges are
+ * supplier-backed so they read live state at scrape time rather than needing to be pushed.
+ */
+public final class Metrics {
+
+    /** Counter series, keyed by the fully-rendered {@code name{labels}} sample id. */
+    private final NavigableMap<String, LongAdder> counters = new ConcurrentSkipListMap<>();
+    /** Gauge series, evaluated at scrape time. */
+    private final NavigableMap<String, Supplier<Number>> gauges = new ConcurrentSkipListMap<>();
+    /** Gauge families whose label set is only known at scrape time, keyed by metric name. */
+    private final NavigableMap<String, Collector> collectors = new ConcurrentSkipListMap<>();
+    /** HELP/TYPE metadata, keyed by bare metric name. */
+    private final Map<String, String[]> meta = new ConcurrentHashMap<>();
+
+    /** A gauge family whose series are discovered per scrape (one label, many values). */
+    private record Collector(String labelName, Supplier<Map<String, Number>> samples) {
+    }
+
+    /** Declare a metric's help text and type once, so the exposition carries HELP/TYPE lines. */
+    public Metrics describe(String name, String type, String help) {
+        meta.put(name, new String[]{type, help});
+        return this;
+    }
+
+    /** Increment a counter by one. */
+    public void inc(String name, String... labelPairs) {
+        add(name, 1, labelPairs);
+    }
+
+    /** Increment a counter by {@code delta}. */
+    public void add(String name, long delta, String... labelPairs) {
+        counters.computeIfAbsent(sample(name, labelPairs), _ -> new LongAdder()).add(delta);
+    }
+
+    /**
+     * Register a live gauge. The supplier is called at scrape time, so it reflects current state
+     * (session census, inbox depth) without anything having to remember to update it.
+     */
+    public void gauge(String name, Supplier<Number> value, String... labelPairs) {
+        gauges.put(sample(name, labelPairs), value);
+    }
+
+    /**
+     * Register a gauge family whose label values are not known up front — inbox depth per target,
+     * for instance, where the set of targets changes as workers come and go. The supplier returns
+     * {@code labelValue → value} and is evaluated once per scrape.
+     */
+    public void collector(String name, String labelName, Supplier<Map<String, Number>> samples) {
+        collectors.put(name, new Collector(labelName, samples));
+    }
+
+    /** Current value of a counter series — for assertions in tests. */
+    public long count(String name, String... labelPairs) {
+        LongAdder a = counters.get(sample(name, labelPairs));
+        return a == null ? 0 : a.sum();
+    }
+
+    /**
+     * Render the Prometheus text exposition format (version 0.0.4): optional {@code # HELP} and
+     * {@code # TYPE} lines per metric family, then one line per sample.
+     */
+    public String render() {
+        StringBuilder out = new StringBuilder(1024);
+        String lastFamily = null;
+        for (Map.Entry<String, LongAdder> e : counters.entrySet()) {
+            lastFamily = emitHeader(out, e.getKey(), lastFamily);
+            out.append(e.getKey()).append(' ').append(e.getValue().sum()).append('\n');
+        }
+        for (Map.Entry<String, Supplier<Number>> e : gauges.entrySet()) {
+            lastFamily = emitHeader(out, e.getKey(), lastFamily);
+            Number v;
+            try {
+                v = e.getValue().get();
+            } catch (RuntimeException ex) {
+                continue; // a broken gauge must never break the whole scrape
+            }
+            if (v == null) {
+                continue;
+            }
+            out.append(e.getKey()).append(' ').append(format(v)).append('\n');
+        }
+        for (Map.Entry<String, Collector> e : collectors.entrySet()) {
+            Map<String, Number> samples;
+            try {
+                samples = e.getValue().samples().get();
+            } catch (RuntimeException ex) {
+                continue; // a broken collector must never break the whole scrape
+            }
+            if (samples == null || samples.isEmpty()) {
+                continue;
+            }
+            lastFamily = emitHeader(out, e.getKey(), lastFamily);
+            // Sort so repeated scrapes are byte-stable and diffable.
+            new java.util.TreeMap<>(samples).forEach((label, v) -> {
+                if (v != null) {
+                    out.append(sample(e.getKey(), e.getValue().labelName(), label))
+                            .append(' ').append(format(v)).append('\n');
+                }
+            });
+        }
+        return out.toString();
+    }
+
+    /** Emit HELP/TYPE when the sample starts a new metric family; returns the current family. */
+    private String emitHeader(StringBuilder out, String sampleId, String lastFamily) {
+        String family = familyOf(sampleId);
+        if (family.equals(lastFamily)) {
+            return lastFamily;
+        }
+        String[] m = meta.get(family);
+        if (m != null) {
+            out.append("# HELP ").append(family).append(' ').append(m[1]).append('\n');
+            out.append("# TYPE ").append(family).append(' ').append(m[0]).append('\n');
+        }
+        return family;
+    }
+
+    private static String familyOf(String sampleId) {
+        int brace = sampleId.indexOf('{');
+        return brace < 0 ? sampleId : sampleId.substring(0, brace);
+    }
+
+    /** Whole numbers render without a decimal point; everything else as-is. */
+    private static String format(Number v) {
+        double d = v.doubleValue();
+        return (d == Math.rint(d) && !Double.isInfinite(d))
+                ? Long.toString((long) d)
+                : Double.toString(d);
+    }
+
+    /** Build the {@code name{k="v",k2="v2"}} sample id; labels are sorted for stable output. */
+    private static String sample(String name, String... labelPairs) {
+        if (labelPairs == null || labelPairs.length == 0) {
+            return name;
+        }
+        if (labelPairs.length % 2 != 0) {
+            throw new IllegalArgumentException("labels must be key/value pairs, got " + labelPairs.length);
+        }
+        NavigableMap<String, String> sorted = new java.util.TreeMap<>();
+        for (int i = 0; i < labelPairs.length; i += 2) {
+            sorted.put(labelPairs[i], labelPairs[i + 1] == null ? "" : labelPairs[i + 1]);
+        }
+        StringBuilder sb = new StringBuilder(name.length() + 16 * sorted.size());
+        sb.append(name).append('{');
+        boolean first = true;
+        for (Map.Entry<String, String> e : sorted.entrySet()) {
+            if (!first) {
+                sb.append(',');
+            }
+            first = false;
+            sb.append(e.getKey()).append("=\"").append(escapeLabel(e.getValue())).append('"');
+        }
+        return sb.append('}').toString();
+    }
+
+    /** Label values are escaped per the exposition format: backslash, quote, newline. */
+    private static String escapeLabel(String v) {
+        return v.replace("\\", "\\\\").replace("\"", "\\\"").replace("\n", "\\n");
+    }
+}

bridged/src/main/java/dev/ltms/bridged/msg/AmqpReplyInbox.java

@@ -0,0 +1,242 @@
+package dev.ltms.bridged.msg;
+
+import com.rabbitmq.client.AMQP;
+import com.rabbitmq.client.Channel;
+import com.rabbitmq.client.Connection;
+import com.rabbitmq.client.ConnectionFactory;
+import com.rabbitmq.client.DeliverCallback;
+import com.rabbitmq.client.Recoverable;
+import com.rabbitmq.client.RecoveryListener;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * AMQP-backed {@link ReplyInbox} (CB-307 Stage 2): genuine cross-restart durability behind the same
+ * port {@link InMemoryReplyInbox} implements as soft state.
+ *
+ * <p><strong>Mapping — consume-and-hold with deferred manual ack.</strong> Each target has a durable
+ * queue {@code agent.<target>.inbox}. The gateway that owns the target starts a manual-ack consumer
+ * ({@link #own}) that pulls persistent messages off that queue into an in-memory <em>held</em> map
+ * (keyed by {@code msgId}) but does <em>not</em> ack them. {@link #peek} returns that snapshot;
+ * {@link #ack} acks the broker delivery-tag and drops the entry. Because messages stay unacked until
+ * the owning gateway actually drains them, a crash (or a {@code java -jar} bounce) before caller-ack
+ * leaves them on the broker — it redelivers on reconnect. That is the durability the in-memory
+ * adapter cannot give, with the port contract preserved.
+ *
+ * <p><strong>Ownership is explicit.</strong> {@link #own} declares the queue and starts the consumer;
+ * {@link #release} cancels it. {@link #publish} sends to the queue but does <em>not</em> imply ownership
+ * and does not attach a consumer. This split is required by CB-308 federation, where one gateway may
+ * publish to an agent owned by another gateway; in that case the publisher must not compete for
+ * deliveries.
+ *
+ * <p><strong>Dedup.</strong> The consumer keys the held map by {@code msgId}; a redelivered duplicate
+ * (at-least-once, or a producer double-publish) is acked-and-dropped on arrival, so it never
+ * double-queues.
+ *
+ * <p><strong>Visibility.</strong> Unlike the in-memory adapter, publish → broker → consumer is
+ * asynchronous, so a {@link #peek} immediately after {@link #publish} may not yet see the message
+ * (broker delivery latency). Callers that need the reply drained poll (as the primary already does);
+ * the contract test waits for visibility. This is inherent to broker-backed delivery, not a defect.
+ *
+ * <p>The default deploy targets LavinMQ; a stock RabbitMQ speaks the same AMQP 0-9-1 (URI-only swap),
+ * so the {@code @Tag("contract")} integration test runs against a RabbitMQ container.
+ */
+public final class AmqpReplyInbox implements ReplyInbox, AutoCloseable {
+
+    private static final Logger log = LoggerFactory.getLogger(AmqpReplyInbox.class);
+
+    private static final String QUEUE_PREFIX = "agent.";
+    private static final String QUEUE_SUFFIX = ".inbox";
+
+    private final Connection connection;
+    private final Channel channel;
+    /** All channel operations (publish/declare/ack/cancel) serialize on this — a Channel is not thread-safe. */
+    private final Object channelLock = new Object();
+    /** target → (msgId → held delivery). Per-target map is guarded by synchronizing on itself. */
+    private final ConcurrentHashMap<String, LinkedHashMap<String, Held>> held = new ConcurrentHashMap<>();
+    /** Targets whose queue is declared and consumer is running, mapped to their broker consumer tag. */
+    private final ConcurrentHashMap<String, String> consumerTags = new ConcurrentHashMap<>();
+
+    /** A message pulled off the broker but not yet acked: its delivery-tag plus the port payload. */
+    private record Held(long deliveryTag, InboxMessage message) {}
+
+    /** Connect to {@code uri} (e.g. {@code amqp://guest:guest@127.0.0.1:5672/}) and open the inbox. */
+    public static AmqpReplyInbox open(String uri) {
+        try {
+            ConnectionFactory factory = new ConnectionFactory();
+            factory.setUri(uri);
+            // Self-heal transient blips; topology recovery re-declares queues and re-attaches consumers.
+            factory.setAutomaticRecoveryEnabled(true);
+            factory.setTopologyRecoveryEnabled(true);
+            return new AmqpReplyInbox(factory.newConnection("bridged-reply-inbox"));
+        } catch (Exception e) {
+            throw new IllegalStateException("cannot connect to AMQP broker at " + uri, e);
+        }
+    }
+
+    /** Wrap an already-open connection (injection seam for the contract test). */
+    AmqpReplyInbox(Connection connection) {
+        this.connection = connection;
+        try {
+            this.channel = connection.createChannel();
+        } catch (IOException e) {
+            throw new IllegalStateException("cannot open AMQP channel", e);
+        }
+        // On automatic recovery the broker redelivers unacked messages with FRESH delivery-tags; the
+        // tags we were holding are now stale. Drop the held snapshot so the re-attached consumer
+        // repopulates it with valid tags (dedup by msgId still prevents any double-queue).
+        if (connection instanceof Recoverable recoverable) {
+            recoverable.addRecoveryListener(new RecoveryListener() {
+                @Override
+                public void handleRecovery(Recoverable recoverable) {
+                    held.clear();
+                    log.info("AMQP connection recovered; cleared held replies for fresh redelivery");
+                }
+
+                @Override
+                public void handleRecoveryStarted(Recoverable recoverable) {
+                    // no-op: we act once recovery completes
+                }
+            });
+        }
+    }
+
+    @Override
+    public void own(String target) {
+        synchronized (channelLock) {
+            if (consumerTags.containsKey(target)) {
+                return;                            // already owning this target
+            }
+            String queue = queueName(target);
+            try {
+                channel.queueDeclare(queue, true, false, false, null); // durable, non-exclusive, keep on idle
+                String tag = channel.basicConsume(queue, false, deliverCallback(target), _ -> { });
+                consumerTags.put(target, tag);
+                log.debug("AMQP inbox owns queue {} for target {}", queue, target);
+            } catch (IOException e) {
+                throw new IllegalStateException("cannot own queue " + queue, e);
+            }
+        }
+    }
+
+    @Override
+    public void release(String target) {
+        synchronized (channelLock) {
+            String tag = consumerTags.remove(target);
+            held.remove(target);                   // stale delivery tags must not survive release
+            if (tag == null) {
+                return;
+            }
+            try {
+                channel.basicCancel(tag);
+            } catch (IOException e) {
+                throw new IllegalStateException("cannot cancel consumer for " + target, e);
+            }
+        }
+    }
+
+    @Override
+    public void publish(String target, String msgId, String content) {
+        AMQP.BasicProperties props = new AMQP.BasicProperties.Builder()
+                .messageId(msgId)
+                .deliveryMode(2)                   // persistent — survives a broker restart
+                .contentType("text/plain")
+                .build();
+        try {
+            synchronized (channelLock) {
+                channel.basicPublish("", queueName(target), props, content.getBytes(StandardCharsets.UTF_8));
+            }
+        } catch (IOException e) {
+            throw new IllegalStateException("cannot publish reply to " + queueName(target), e);
+        }
+    }
+
+    @Override
+    public List<InboxMessage> peek(String target) {
+        var perTarget = held.get(target);
+        if (perTarget == null) {
+            return List.of();
+        }
+        synchronized (perTarget) {
+            return perTarget.values().stream().map(Held::message).toList();
+        }
+    }
+
+    @Override
+    public void ack(String target, String msgId) {
+        var perTarget = held.get(target);
+        if (perTarget == null) {
+            return;
+        }
+        Held h;
+        synchronized (perTarget) {
+            h = perTarget.remove(msgId);
+        }
+        if (h == null) {
+            return;                                // never held (or already acked) — no-op
+        }
+        try {
+            synchronized (channelLock) {
+                channel.basicAck(h.deliveryTag(), false);
+            }
+        } catch (IOException e) {
+            // Ack didn't reach the broker: restore the entry so a later ack (or a redelivery after
+            // reconnect) can retry. Keeps the at-least-once contract — a reply is never silently lost.
+            synchronized (perTarget) {
+                perTarget.putIfAbsent(msgId, h);
+            }
+            throw new IllegalStateException("cannot ack reply " + msgId + " on " + queueName(target), e);
+        }
+    }
+
+    private DeliverCallback deliverCallback(String target) {
+        return (_, delivery) -> {
+            String msgId = delivery.getProperties().getMessageId();
+            long tag = delivery.getEnvelope().getDeliveryTag();
+            if (msgId == null || msgId.isBlank()) {
+                msgId = Long.toHexString(tag);     // synthesize an id so dedup still has a key
+            }
+            String content = new String(delivery.getBody(), StandardCharsets.UTF_8);
+            var perTarget = held.computeIfAbsent(target, _ -> new LinkedHashMap<>());
+            boolean duplicate;
+            synchronized (perTarget) {
+                if (perTarget.containsKey(msgId)) {
+                    duplicate = true;
+                } else {
+                    perTarget.put(msgId, new Held(tag, new InboxMessage(msgId, target, content)));
+                    duplicate = false;
+                }
+            }
+            if (duplicate) {
+                // Redelivered duplicate: ack the new tag and drop it so the broker stops resending.
+                synchronized (channelLock) {
+                    channel.basicAck(tag, false);
+                }
+            }
+        };
+    }
+
+    private static String queueName(String target) {
+        return QUEUE_PREFIX + target + QUEUE_SUFFIX;
+    }
+
+    @Override
+    public void close() {
+        try {
+            channel.close();
+        } catch (Exception e) {
+            log.debug("AMQP channel close: {}", e.toString());
+        }
+        try {
+            connection.close();
+        } catch (Exception e) {
+            log.debug("AMQP connection close: {}", e.toString());
+        }
+    }
+}

bridged/src/main/java/dev/ltms/bridged/msg/InMemoryReplyInbox.java

@@ -0,0 +1,74 @@
+package dev.ltms.bridged.msg;
+
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * Soft-state {@link ReplyInbox} backed by a {@link ConcurrentHashMap} keyed by target session.
+ * Per-target FIFO ordering (insertion order via {@link LinkedHashMap}). Dedup by {@code msgId}
+ * within a target. Thread-safe for concurrent publish vs. drain.
+ *
+ * <p><strong>Ownership is explicit.</strong> {@link #own} marks a target as locally owned so that
+ * {@link #peek} and {@link #ack} operate on it; {@link #publish} works whether or not the target is
+ * owned. {@link #release} clears the local snapshot. This mirrors the AMQP adapter's contract so the
+ * non-broker path stays interchangeable.
+ *
+ * <p><strong>This is soft-state, NOT persistence.</strong> Lost on a {@code java -jar} bounce — that
+ * is correct and consistent with "bridged stays soft-state." The Stage-2 AMQP adapter replaces this.
+ */
+public final class InMemoryReplyInbox implements ReplyInbox {
+
+    private final ConcurrentHashMap<String, LinkedHashMap<String, InboxMessage>> store = new ConcurrentHashMap<>();
+    private final Set<String> owned = ConcurrentHashMap.newKeySet();
+
+    @Override
+    public void own(String target) {
+        owned.add(target);
+    }
+
+    @Override
+    public void release(String target) {
+        owned.remove(target);
+        store.remove(target);
+    }
+
+    @Override
+    public void publish(String target, String msgId, String content) {
+        var perTarget = store.computeIfAbsent(target, _ -> new LinkedHashMap<>());
+        //noinspection SynchronizationOnLocalVariableOrMethodParameter
+        synchronized (perTarget) {
+            perTarget.putIfAbsent(msgId, new InboxMessage(msgId, target, content));
+        }
+    }
+
+    @Override
+    public List<InboxMessage> peek(String target) {
+        if (!owned.contains(target)) {
+            return List.of();
+        }
+        var perTarget = store.get(target);
+        if (perTarget == null) {
+            return List.of();
+        }
+        //noinspection SynchronizationOnLocalVariableOrMethodParameter
+        synchronized (perTarget) {
+            return List.copyOf(perTarget.values());
+        }
+    }
+
+    @Override
+    public void ack(String target, String msgId) {
+        if (!owned.contains(target)) {
+            return;
+        }
+        var perTarget = store.get(target);
+        if (perTarget != null) {
+            //noinspection SynchronizationOnLocalVariableOrMethodParameter
+            synchronized (perTarget) {
+                perTarget.remove(msgId);
+            }
+        }
+    }
+}

bridged/src/main/java/dev/ltms/bridged/msg/LeadHeartbeatLoop.java

@@ -0,0 +1,351 @@
+package dev.ltms.bridged.msg;
+
+import dev.ltms.bridged.herdr.AgentControl;
+import dev.ltms.bridged.herdr.AgentStatus;
+import dev.ltms.bridged.mcp.PrimaryRegistry;
+import dev.ltms.bridged.metrics.BridgedMetrics;
+import dev.ltms.bridged.metrics.Metrics;
+import dev.ltms.bridged.session.MemberSession;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+import java.util.function.LongSupplier;
+import java.util.function.Supplier;
+
+/**
+ * CB-551: an opt-in heartbeat that nudges the single idle lead back to work once it has been
+ * continuously idle past a quiet period with no open {@code bridge_send} driving it.
+ *
+ * <p>Why this exists: the fleet is ONE lead + architects + workers, so an idle, stalled lead is a
+ * single point of failure for the fleet's progress. {@link ReplyPushLoop} nudges the lead only when
+ * a worker reply lands; this loop is the timer that catches the gap where nothing lands and the
+ * lead simply sits idle with nobody to prompt it onward.
+ *
+ * <p>Mechanism mirrors {@link ReplyPushLoop}: a pure, unit-testable decision function
+ * ({@link #decide(long, Long, int, AgentStatus, boolean, boolean, FleetState)}) plus a thin
+ * scheduler around it. The loop is <em>entirely opt-in</em> ({@code leadHeartbeat:} in config); with
+ * no such block it is never constructed, so upgrading the daemon cannot silently acquire a behaviour
+ * that spends the operator's model subscription on its own initiative (constraint 1).
+ *
+ * <p>Four invariants keep it from becoming a runaway subscription burner:
+ * <ol>
+ *   <li><b>Status-gated</b> — a {@code WORKING} lead is making progress and is never touched; only an
+ *       injectable (idle/done/blocked) lead is even considered (constraint 2).</li>
+ *   <li><b>Debounced</b> — a nudge only fires once the lead has been <em>continuously</em> idle past
+ *       {@code idleAfterSeconds}, so a lead that just finished a turn is not re-prompted into every
+ *       natural pause (constraint 3).</li>
+ *   <li><b>Bounded when quiet</b> — consecutive nudges that find no pending fleet state are capped at
+ *       {@code quietNudgeCap}, then the loop stops nudging until real state returns (constraint 4).</li>
+ *   <li><b>Never races {@link ReplyPushLoop}</b> — while that loop is actively nudging any target this
+ *       loop stands down, so two competing injections never start two turns in the same pane
+ *       (constraint 6).</li>
+ * </ol>
+ */
+public final class LeadHeartbeatLoop {
+
+    private static final Logger log = LoggerFactory.getLogger(LeadHeartbeatLoop.class);
+
+    /** Sentinel for {@link #idleSinceNanos}: the lead is not currently in an idle stretch. */
+    private static final long NOT_IDLE = Long.MIN_VALUE;
+
+    private final PrimaryRegistry primaryRegistry;
+    private final AgentControl agents;
+    private final ReplyInbox inbox;
+    private final Supplier<List<MemberSession>> roster;
+    private final ReplyPushLoop pushLoop;
+    private final ScheduledExecutorService scheduler;
+    private final LongSupplier clock;
+    private final long idleAfterNanos;
+    private final long backoffMs;
+    private final int quietNudgeCap;
+    private final Metrics metrics; // CB-512 pattern: nullable — no registry in unit tests
+
+    /** When the current idle stretch began (nanos), or {@link #NOT_IDLE}. Single scheduler thread only. */
+    private long idleSinceNanos = NOT_IDLE;
+    /** Consecutive nudges that found no pending fleet state. Single scheduler thread only. */
+    private int quietCount = 0;
+
+    /** Constructor with an injectable clock and no metric registry (unit tests, or wiring that opts out). */
+    public LeadHeartbeatLoop(PrimaryRegistry primaryRegistry, AgentControl agents, ReplyInbox inbox,
+                             Supplier<List<MemberSession>> roster, ReplyPushLoop pushLoop,
+                             ScheduledExecutorService scheduler, LongSupplier clock,
+                             long idleAfterNanos, long backoffMs, int quietNudgeCap) {
+        this(primaryRegistry, agents, inbox, roster, pushLoop, scheduler, clock,
+                idleAfterNanos, backoffMs, quietNudgeCap, null);
+    }
+
+    /** As above, with a metric registry (the CB-512 pattern) so nudge outcomes are counted. */
+    public LeadHeartbeatLoop(PrimaryRegistry primaryRegistry, AgentControl agents, ReplyInbox inbox,
+                             Supplier<List<MemberSession>> roster, ReplyPushLoop pushLoop,
+                             ScheduledExecutorService scheduler, LongSupplier clock,
+                             long idleAfterNanos, long backoffMs, int quietNudgeCap, Metrics metrics) {
+        this.primaryRegistry = primaryRegistry;
+        this.agents = agents;
+        this.inbox = inbox;
+        this.roster = roster;
+        this.pushLoop = pushLoop;
+        this.scheduler = scheduler;
+        this.clock = clock;
+        this.idleAfterNanos = idleAfterNanos;
+        this.backoffMs = backoffMs;
+        this.quietNudgeCap = quietNudgeCap;
+        this.metrics = metrics;
+    }
+
+    /** Count one nudge outcome when a registry is wired; a no-op in unit tests. */
+    private void countNudge(String outcome) {
+        if (metrics != null) {
+            metrics.inc(BridgedMetrics.HEARTBEAT_NUDGES, "outcome", outcome);
+        }
+    }
+
+    // --- decision logic (package-private for unit-testing) --------------------------------------
+
+    /** The action the loop should take on one tick. */
+    enum Action {
+        /** Send a heartbeat nudge to the lead now. */
+        INJECT,
+        /** Lead is idle but not yet past the quiet period — keep waiting, do nothing. */
+        WAIT_IDLE,
+        /** Lead is making progress (or its status cannot be read) — reset the idle window and re-arm. */
+        LEAD_BUSY,
+        /** Idle past the quiet period with nothing pending and the cap exhausted — stop until new state appears. */
+        QUIET_DONE,
+        /** {@link ReplyPushLoop} is actively nudging — stand aside rather than start a competing turn. */
+        STAND_DOWN
+    }
+
+    /** The outcome of one decision: the action plus the state to persist for the next tick. */
+    record Decision(Action action, Long idleSinceNanos, int quietCount) {}
+
+    /**
+     * Pure decision function: given the current loop state and fleet/lead facts, return what to do
+     * next and the exact state to carry forward. Pure means no I/O and no mutation — the caller
+     * ({@link #tick}) applies {@link Decision} to its fields. This is what makes the loop unit-testable
+     * with a fake clock and no sleeping.
+     *
+     * @param nowNanos        the current time (an injected clock in tests, {@link System#nanoTime()} live)
+     * @param idleSinceNanos  when the current idle stretch began, or {@code null} if the lead is not idle
+     * @param quietCount      consecutive nudges so far that found no pending fleet state
+     * @param status          the lead's herdr status
+     * @param pushLoopActive  whether {@link ReplyPushLoop} is currently nudging some target (constraint 6)
+     * @param leadKnown       whether a lead terminal is known to nudge at all
+     * @param fleet           a snapshot of the pending fleet state (constraint 5)
+     * @return the action to take and the state to persist
+     */
+    Decision decide(long nowNanos, Long idleSinceNanos, int quietCount, AgentStatus status,
+                    boolean pushLoopActive, boolean leadKnown, FleetState fleet) {
+        // Constraint 6: while ReplyPushLoop is actively nudging the lead, injecting a second,
+        // competing prompt into the same pane would start a second turn — racing loops multiply
+        // turns and context burn. Stand aside, and treat the active push as real state (re-arm the
+        // quiet counter), because the reply that drove it is exactly the kind of new state that
+        // should reset the cap.
+        if (pushLoopActive) {
+            return new Decision(Action.STAND_DOWN, idleSinceNanos, 0);
+        }
+        // Constraint 2: a WORKING lead is making progress and must NOT be touched; an unreadable
+        // status (read failure, or the agent is gone) is safest treated the same way — never inject
+        // into a state we cannot read. Either way, reset the idle window and the quiet counter: the
+        // lead was / may be active, so the next idle stretch must count its own quiet period fresh.
+        if (status == null || !status.injectable()) {
+            return new Decision(Action.LEAD_BUSY, null, 0);
+        }
+        if (idleSinceNanos == null) {
+            // The lead just became injectable — record the start of an idle stretch and wait out the
+            // debounce quiet period before ever nudging (constraint 3).
+            return new Decision(Action.WAIT_IDLE, nowNanos, quietCount);
+        }
+        if (nowNanos - idleSinceNanos < idleAfterNanos) {
+            // Still within the quiet period: the lead that just finished a turn sits momentarily idle
+            // and must not be re-prompted into every natural pause.
+            return new Decision(Action.WAIT_IDLE, idleSinceNanos, quietCount);
+        }
+        // Past the quiet period with an injectable lead: it is a genuine candidate for a nudge. Two
+        // gating facts decide whether and how:
+        if (!leadKnown) {
+            // No lead terminal is known yet (e.g. the registry has not learned one) — there is nobody
+            // to nudge. Keep waiting; the window stays open so discovery re-arms it without a fresh
+            // quiet period.
+            return new Decision(Action.WAIT_IDLE, idleSinceNanos, quietCount);
+        }
+        if (fleet.hasPending()) {
+            // Real fleet state is waiting — a worker reply or a DONE session. This is new state, so
+            // it resets the quiet counter (constraint 4) and the lead is nudged to go collect it.
+            return new Decision(Action.INJECT, idleSinceNanos, 0);
+        }
+        if (quietCount < quietNudgeCap) {
+            // Nothing is pending, but the cap is not exhausted: nudge anyway, telling the lead
+            // exactly that nothing is waiting so it can choose to stand down rather than hunt
+            // (constraint 5). Count it toward the consecutive-quiet cap.
+            return new Decision(Action.INJECT, idleSinceNanos, quietCount + 1);
+        }
+        // Nothing pending and the cap is exhausted: stop nudging until real state appears again
+        // (constraint 4). The loop still ticks on backoff so a genuinely new reply or session change
+        // re-arms it — QUIET_DONE stops injection, not observation.
+        return new Decision(Action.QUIET_DONE, idleSinceNanos, quietCount);
+    }
+
+    // --- loop ----------------------------------------------------------------------------------
+
+    /**
+     * Start the heartbeat. Schedules the first tick after one backoff so a freshly-booting daemon
+     * does not evaluate the lead's idle state before the fleet has settled.
+     */
+    public void start() {
+        log.info("idle-lead heartbeat: on — nudge lead after {}s idle (recheck {}ms, quiet cap {})",
+                TimeUnit.NANOSECONDS.toSeconds(idleAfterNanos), backoffMs, quietNudgeCap);
+        scheduler.schedule(this::tick, backoffMs, TimeUnit.MILLISECONDS);
+    }
+
+    /** One loop tick, every {@link #backoffMs} — the thin scheduler around {@link #decide}. */
+    private void tick() {
+        boolean leadKnown = primaryRegistry.primaryTerminal().isPresent();
+        FleetState fleet = snapshot(inbox, roster);
+        AgentStatus status = AgentStatus.UNKNOWN;
+        if (leadKnown) {
+            try {
+                status = agents.status(primaryRegistry.primaryTerminal().orElseThrow());
+            } catch (RuntimeException e) {
+                // A failed status read degrades to "unknown" — decide() treats that like a busy lead
+                // and never injects into a state it cannot read. Retry on the next backoff.
+                log.debug("idle-heartbeat: status check failed for lead, will retry: {}", e.toString());
+            }
+        }
+
+        Decision d = decide(clock.getAsLong(),
+                idleSinceNanos == NOT_IDLE ? null : idleSinceNanos,
+                quietCount, status, pushLoop.isActive(), leadKnown, fleet);
+        applyDecision(d);
+        switch (d.action()) {
+            case INJECT -> injectNudge(fleet);
+            case QUIET_DONE -> countNudge("exhausted");
+            case WAIT_IDLE, LEAD_BUSY, STAND_DOWN -> { /* nothing to inject, nothing to count */ }
+        }
+        scheduleNext();
+    }
+
+    /** Persist the state a decision returned, so the next tick starts from it. */
+    private void applyDecision(Decision d) {
+        idleSinceNanos = d.idleSinceNanos() == null ? NOT_IDLE : d.idleSinceNanos();
+        quietCount = d.quietCount();
+    }
+
+    /** Send the nudge to the known lead. */
+    private void injectNudge(FleetState fleet) {
+        var lead = primaryRegistry.primaryTerminal();
+        if (lead.isEmpty()) {
+            return; // the lead disappeared between the decision and the injection
+        }
+        String leadTerminal = lead.get();
+        try {
+            agents.send(leadTerminal, fleet.nudgeText());
+            log.debug("idle-heartbeat: nudge sent to lead {} (quiet nudges so far in this stretch: {})",
+                    leadTerminal, quietCount);
+            countNudge("delivered");
+        } catch (RuntimeException e) {
+            log.warn("idle-heartbeat: failed to nudge lead {}: {}", leadTerminal, e.toString());
+            countNudge("failed");
+        }
+    }
+
+    /** Schedule the next tick on the scheduler thread pool. */
+    private void scheduleNext() {
+        scheduler.schedule(this::tick, backoffMs, TimeUnit.MILLISECONDS);
+    }
+
+    // --- lifecycle -----------------------------------------------------------------------------
+
+    /** Shut down the scheduler; outstanding ticks are cancelled. */
+    public void stop() {
+        scheduler.shutdownNow();
+    }
+
+    /** @see #stop() */
+    public void close() {
+        stop();
+    }
+
+    /**
+     * A read-only snapshot of the fleet facts the heartbeat reports to an idle lead. Carries exact
+     * counts and names the targets that hold replies, so the nudge is actionable rather than a
+     * content-free "keep working" that would cost the lead a turn just to discover what there is to
+     * do (constraint 5).
+     *
+     * @param pendingReplies total undrained worker replies across owned targets
+     * @param doneSessions   session count in the DONE state — finished turns awaiting teardown
+     * @param liveWorkers    sessions still registered (acquired minus released)
+     * @param replyTargets   the terminals whose inboxes currently hold at least one reply
+     */
+    record FleetState(int pendingReplies, int doneSessions, int liveWorkers, List<String> replyTargets) {
+
+        /** True when the lead has something real to collect — a reply or a session awaiting teardown. */
+        boolean hasPending() {
+            return pendingReplies > 0 || doneSessions > 0;
+        }
+
+        /** The nudge body, phrased for the two cases the heartbeat distinguishes. */
+        String nudgeText() {
+            StringBuilder sb = new StringBuilder(
+                    "Heartbeat: you are idle and no bridge_send is waiting on you.");
+            if (hasPending()) {
+                sb.append(" The fleet has state to collect: ").append(pendingDetail());
+            } else {
+                sb.append(" Fleet is quiet — nothing pending to collect (")
+                        .append(pendingReplies).append(" worker replies, ")
+                        .append(doneSessions).append(" DONE sessions); ")
+                        .append(liveWorkers).append(" workers live. You may stand down until new state re-arms me.");
+            }
+            return sb.toString();
+        }
+
+        private String pendingDetail() {
+            StringBuilder sb = new StringBuilder();
+            sb.append(pendingReplies).append(" worker ")
+                    .append(pendingReplies == 1 ? "reply" : "replies")
+                    .append(" pending collection");
+            if (!replyTargets.isEmpty()) {
+                // Render each as the exact command so the lead can act without parsing: the nearest
+                // analogue to ReplyPushLoop's bridge_poll(target=...) nudge.
+                sb.append(" (")
+                        .append(String.join(", ",
+                                replyTargets.stream().map(t -> "bridge_poll(target=" + t + ")").toList()))
+                        .append(")");
+            }
+            sb.append(", ").append(doneSessions).append(" DONE session").append(doneSessions == 1 ? "" : "s")
+                    .append(" awaiting teardown")
+                    .append(", ").append(liveWorkers).append(" worker").append(liveWorkers == 1 ? "" : "s")
+                    .append(" live");
+            return sb.toString();
+        }
+    }
+
+    /**
+     * Build a {@link FleetState} snapshot over the live roster and the reply inbox — the same
+     * sources the metrics collector uses, so the heartbeat reports facts the operator can cross-check
+     * against {@code /metrics}. Package-private and pure (reads only) so it is unit-testable.
+     */
+    static FleetState snapshot(ReplyInbox inbox, Supplier<List<MemberSession>> roster) {
+        List<MemberSession> sessions = roster.get();
+        int replies = 0;
+        int done = 0;
+        List<String> replyTargets = new ArrayList<>();
+        for (MemberSession s : sessions) {
+            if (s.terminalId() == null) {
+                continue;
+            }
+            int depth = inbox.peek(s.terminalId()).size();
+            if (depth > 0) {
+                replies += depth;
+                replyTargets.add(s.terminalId());
+            }
+            if (s.state() == MemberSession.State.DONE) {
+                done++;
+            }
+        }
+        return new FleetState(replies, done, sessions.size(), List.copyOf(replyTargets));
+    }
+}

bridged/src/main/java/dev/ltms/bridged/msg/MessageService.java

@@ -0,0 +1,569 @@
+package dev.ltms.bridged.msg;
+
+import dev.ltms.bridged.herdr.AgentControl;
+import dev.ltms.bridged.herdr.AgentStatus;
+import dev.ltms.bridged.inject.Injector;
+import dev.ltms.bridged.metrics.BridgedMetrics;
+import dev.ltms.bridged.metrics.Metrics;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.List;
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionException;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.concurrent.locks.ReentrantLock;
+
+/**
+ * The blocking delegation feature (CB-104): deliver {@code content} into a worker and block until
+ * the worker returns a <em>structured reply</em> via {@code bridge_reply} (the {@link Rendezvous}),
+ * then hand that reply back. Delivery is the {@link Injector}'s job (the background poller sends it
+ * when the worker is injectable); this service never drives the injector or scrapes the terminal —
+ * completion is the worker's explicit reply, not a guess about {@code agent_status}.
+ *
+ * <p>Sends are serialized per session so exactly one reply can be outstanding per worker, which is
+ * what lets a reply map unambiguously to its send (no cross-talk between concurrent callers).
+ *
+ * <p>If the worker never replies within the timeout, the caller gets a typed "still working" /
+ * "queued" outcome — the message may still be mid-flight. A finished-but-unreplied turn is caught
+ * by the CB-106 completion fallback (see {@link Rendezvous#resolveCompletion}).
+ *
+ * <p><strong>Async fire-and-poll (CB-107).</strong> A caller's MCP client caps a blocking call at
+ * ~60s, but a real delegated task runs for minutes. {@link #sendAsync} therefore runs the same
+ * blocking {@link #send} on a background virtual thread and hands back a <em>ticket</em> the caller
+ * polls with {@link #poll}. The blocking and async paths share one code path (and the same per-target
+ * serialization), so async inherits the reply + completion resolution behaviour for free.
+ */
+public final class MessageService {
+
+    private static final Logger log = LoggerFactory.getLogger(MessageService.class);
+
+    /**
+     * The window a fire-and-poll send waits for resolution — generous, since no caller is blocked on
+     * it; a real delegated task resolves (reply or completion) well within this, and only a genuinely
+     * hung worker rides it out.
+     */
+    private static final long ASYNC_TIMEOUT_MS = 30 * 60 * 1_000L;
+
+    /** How long a finished (terminal) ticket is retained for polling before it is pruned. */
+    private static final long TICKET_TTL_NANOS = 10 * 60 * 1_000_000_000L;
+
+    /** Outcome of a blocking send. */
+    public enum Outcome {
+        /** The worker called {@code bridge_reply}; {@code text} holds the structured answer. */
+        REPLIED,
+        /**
+         * The worker's delegated turn finished without a {@code bridge_reply} (CB-106 fallback);
+         * {@code text} is the scraped transcript tail rather than a structured answer.
+         */
+        COMPLETED_UNREPLIED,
+        /**
+         * The worker ran the turn then wedged in an unrecoverable state (CB-109); {@code text} is the
+         * failure context (e.g. the error screen). Terminal, but not a successful completion.
+         */
+        WORKER_FAILED,
+        /**
+         * The worker paused mid-turn to ask the primary a question (CB-205); {@code text} is the
+         * question and {@code turnId} correlates the answer. Not terminal — the primary answers with
+         * {@link #answer(String, String, long)} and the turn resumes.
+         */
+        QUESTION,
+        /** Timed out after the message was delivered — the worker is still working. */
+        TIMED_OUT_WORKING,
+        /** Timed out before delivery — the message is still queued for the worker. */
+        TIMED_OUT_QUEUED,
+        /** Another send to this session was in flight for the whole window. */
+        BUSY,
+        /**
+         * An answer ({@link #answer(String, String, long)}) referenced a {@code turnId} that is no
+         * longer open — the worker's {@code bridge_ask} already timed out or was answered.
+         */
+        STALE_TURN
+    }
+
+    /**
+     * @param outcome how the send ended (or paused)
+     * @param text    the worker's answer when {@link #completed()} (a structured {@code bridge_reply}
+     *                for {@link Outcome#REPLIED}, a scraped transcript tail for
+     *                {@link Outcome#COMPLETED_UNREPLIED}), or the question for {@link Outcome#QUESTION},
+     *                else {@code null}
+     * @param turnId  correlation id for a {@link Outcome#QUESTION} (answered via
+     *                {@link #answer(String, String, long)}), else {@code null}
+     */
+    public record Reply(Outcome outcome, String text, String turnId) {
+        /** A reply with no correlation id (the common terminal outcomes). */
+        public Reply(Outcome outcome, String text) {
+            this(outcome, text, null);
+        }
+
+        /** Whether the worker's turn actually finished with an answer (replied or scraped). */
+        public boolean completed() {
+            return outcome == Outcome.REPLIED || outcome == Outcome.COMPLETED_UNREPLIED;
+        }
+    }
+
+    /** How a worker's {@code bridge_ask} (CB-205) resolved. */
+    public enum AskOutcome {
+        /** The primary answered; {@link AskResult#answer} carries it. */
+        ANSWERED,
+        /** No delegation was open to surface the question to — the worker has no one to ask. */
+        NO_WAITER,
+        /** The primary did not answer within the window. */
+        TIMED_OUT
+    }
+
+    /** The outcome of a worker's {@code bridge_ask}: how it resolved and (if answered) the answer. */
+    public record AskResult(AskOutcome outcome, String answer) {
+    }
+
+    /** Lifecycle phase of an async delegation ticket. */
+    public enum Phase {
+        /** Delegated and in flight — queued for the worker or being worked. */
+        PENDING,
+        /** The worker's turn finished; {@link TaskView#reply} holds the answer. */
+        DONE,
+        /** The delegation could not complete (timed out, worker gone, or busy). */
+        FAILED
+    }
+
+    /**
+     * A poll snapshot of an async delegation.
+     *
+     * @param reply       the answer when {@link #phase} is {@link Phase#DONE}, else {@code null}
+     * @param replySource {@code "reply"} (structured {@code bridge_reply}) or {@code "transcript"}
+     *                    (completion scrape) when {@link Phase#DONE}, else {@code null}
+     * @param detail      a human note (live worker status while pending, or the failure reason)
+     */
+    public record TaskView(String ticket, Phase phase, String reply, String replySource, String detail) {
+    }
+
+    /** An in-flight or finished async delegation, keyed by its ticket. */
+    private record Task(String target, CompletableFuture<Reply> future, long createdNanos) {
+    }
+
+    private final AgentControl agents;
+    private final Injector injector;
+    private final Rendezvous rendezvous;
+    private final ReplyInbox inbox;
+    private final ReplyPushLoop pushLoop;
+    private final Metrics metrics; // CB-502: nullable — no registry in unit tests
+    private final ConcurrentHashMap<String, ReentrantLock> sessionLocks = new ConcurrentHashMap<>();
+    private final ConcurrentHashMap<String, Task> tasks = new ConcurrentHashMap<>();
+    private final AtomicLong ticketSeq = new AtomicLong();
+    private final ExecutorService asyncExecutor = Executors.newThreadPerTaskExecutor(
+            Thread.ofVirtual().name("bridge-async-", 0).factory());
+
+    /**
+     * Create with an explicit {@link ReplyInbox} and optional {@link ReplyPushLoop}.
+     *
+     * @param pushLoop nullable — when non-null, the push loop is notified on the no-waiter reply
+     *                 branch ({@link #reply}) so it can nudge the primary to drain the inbox
+     */
+    public MessageService(AgentControl agents, Injector injector, Rendezvous rendezvous,
+                          ReplyInbox inbox, ReplyPushLoop pushLoop) {
+        this(agents, injector, rendezvous, inbox, pushLoop, null);
+    }
+
+    /**
+     * As above, with a metric registry (CB-502). Instrumenting here rather than at the REST and MCP
+     * edges means both surfaces are counted by one piece of code and cannot drift.
+     *
+     * @param metrics nullable — when null, nothing is recorded
+     */
+    public MessageService(AgentControl agents, Injector injector, Rendezvous rendezvous,
+                          ReplyInbox inbox, ReplyPushLoop pushLoop, Metrics metrics) {
+        this.agents = agents;
+        this.injector = injector;
+        this.rendezvous = rendezvous;
+        this.inbox = inbox;
+        this.pushLoop = pushLoop;
+        this.metrics = metrics;
+    }
+
+    /** Create with an explicit {@link ReplyInbox} and no push loop. */
+    public MessageService(AgentControl agents, Injector injector, Rendezvous rendezvous, ReplyInbox inbox) {
+        this(agents, injector, rendezvous, inbox, null);
+    }
+
+    /** Backward-compatible constructor that uses a default {@link InMemoryReplyInbox}. */
+    public MessageService(AgentControl agents, Injector injector, Rendezvous rendezvous) {
+        this(agents, injector, rendezvous, new InMemoryReplyInbox());
+    }
+
+    /** Current lifecycle status of a worker (the {@code GET /sessions/{id}/status} surface). */
+    public AgentStatus status(String target) {
+        return agents.status(target);
+    }
+
+    /**
+     * Route a worker's explicit {@code bridge_reply}: resolve an open send, or queue it in the
+     * inbox if no send is currently open. Unlike the bare {@link Rendezvous#resolve}, a no-waiter
+     * result is <em>not</em> a failure — the reply is held for later drain.
+     *
+     * <p><strong>Do NOT use this for mid-turn questions.</strong> {@code bridge_ask} /
+     * {@link Rendezvous#resolveQuestion} must keep today's {@code NO_WAITER} behaviour — questions
+     * are interactive and must never be queued.
+     *
+     * @return always {@code true} — the reply either resolved a live send or was queued
+     */
+    public boolean reply(String session, String content) {
+        if (rendezvous.resolve(session, content)) {
+            count(BridgedMetrics.REPLIES, "path", "rendezvous");
+            return true;                       // a live send took it — unchanged fast path
+        }
+        inbox.publish(session, UUID.randomUUID().toString(), content);
+        // A rising inbox share is the signal CB-307 exists to make visible: the worker finished but
+        // nobody was waiting, so delivery now depends on the push loop and a drain.
+        count(BridgedMetrics.REPLIES, "path", "inbox");
+        if (pushLoop != null) {
+            pushLoop.onReplyQueued(session);
+        }
+        return true;                           // held, not lost
+    }
+
+    /** Record a counter sample when a registry is wired; a no-op in unit tests. */
+    private void count(String name, String... labels) {
+        if (metrics != null) {
+            metrics.inc(name, labels);
+        }
+    }
+
+    /** Count a send's terminal outcome and pass the reply through unchanged. */
+    private Reply recorded(Reply r) {
+        String label = sendOutcomeLabel(r.outcome());
+        if (label != null) {
+            count(BridgedMetrics.SENDS, "outcome", label);
+        }
+        return r;
+    }
+
+    /** Map a terminal send outcome to its metric label, or {@code null} for non-terminal ones. */
+    private static String sendOutcomeLabel(Outcome o) {
+        return switch (o) {
+            case REPLIED -> "replied";
+            case COMPLETED_UNREPLIED -> "completion_fallback";
+            case TIMED_OUT_WORKING, TIMED_OUT_QUEUED, BUSY -> "timeout";
+            case WORKER_FAILED -> "failed";
+            case STALE_TURN, QUESTION -> null; // not a completed delegation
+        };
+    }
+
+    /**
+     * Abandon any send still waiting on {@code target} because its session has gone away (CB-516).
+     *
+     * <p>Without this, tearing a worker down left its rendezvous waiter open: a blocking
+     * {@code bridge_send} kept blocking, and an async one kept reporting {@code PENDING} until
+     * {@link #ASYNC_TIMEOUT_MS} — thirty minutes — even though the worker provably no longer
+     * existed and the delegation could never complete. Worse, {@code poll} already had the evidence
+     * (it calls {@code liveStatus} to build its detail string and gets back {@code "unknown"}) and
+     * reported {@code PENDING} anyway.
+     *
+     * <p>Resolving the waiter as a failure — rather than letting it time out — also means the
+     * outcome is counted, so a torn-down delegation stops being invisible to {@code /metrics}.
+     *
+     * @return true if a live waiter was failed
+     */
+    public boolean abandon(String target, String reason) {
+        CompletableFuture<Rendezvous.Resolution> waiter = rendezvous.currentWaiter(target);
+        if (waiter == null || waiter.isDone()) {
+            return false; // nobody is blocked on this worker — nothing to abandon
+        }
+        boolean failed = rendezvous.resolveFailure(waiter, reason);
+        if (failed) {
+            log.warn("abandoning the blocked send to {}: {}", target, reason);
+        }
+        return failed;
+    }
+
+    /**
+     * Acknowledge a specific reply by {@code msgId} for {@code target}. Removes it from the inbox
+     * so that a subsequent drain or peek no longer returns it.
+     */
+    public void ackReply(String target, String msgId) {
+        inbox.ack(target, msgId);
+    }
+
+    /**
+     * Drain (peek + ack) all pending inbox replies for {@code target}. At-least-once: returns the
+     * messages and acknowledges them; an in-flight failure between returning and the caller
+     * processing them re-surfaces them on a subsequent drain (the ack is local).
+     *
+     * @return the drained messages, newest last (FIFO); empty list if none
+     */
+    public List<ReplyInbox.InboxMessage> drainReplies(String target) {
+        var messages = inbox.peek(target);
+        for (var msg : messages) {
+            inbox.ack(target, msg.msgId());
+        }
+        return messages;
+    }
+
+    /**
+     * Deliver {@code content} to {@code target} (a herdr {@code terminal_id}) and block until the
+     * worker replies via {@link Rendezvous} or {@code timeoutMillis} elapses.
+     */
+    public Reply send(String target, String content, long timeoutMillis) {
+        return send(target, content, timeoutMillis, null);
+    }
+
+    /**
+     * As {@link #send(String, String, long)}, but with an accepted-delivery hook.
+     *
+     * <p>{@code onAccepted} is invoked exactly once, once this send has won {@code target}'s send
+     * lock and so become the <em>accepted target turn</em> — it runs <em>before</em> delivery is
+     * queued, so a throwing hook fails the send cleanly (the waiter it already opened is closed and
+     * nothing is left queued). It is <em>not</em> invoked when the send is {@link Outcome#BUSY}
+     * (lock never taken). A caller uses this to record that <em>it</em> now owns the delegation's
+     * reply routing (CB-548: {@code PrimaryRegistry} delegator ownership) — recording only on
+     * acceptance means a concurrent sender that times out {@code BUSY} can never steal ownership it
+     * never earned. {@code null} disables the hook.
+     */
+    public Reply send(String target, String content, long timeoutMillis, Runnable onAccepted) {
+        long deadlineNanos = System.nanoTime() + timeoutMillis * 1_000_000L;
+        ReentrantLock lock = sessionLocks.computeIfAbsent(target, _ -> new ReentrantLock());
+
+        if (!tryLock(lock, remainingMillis(deadlineNanos))) {
+            return new Reply(Outcome.BUSY, null); // another send held the session the whole window
+        }
+        try {
+            // Open the waiter BEFORE queueing delivery (CB-548). A fast reply — the worker already
+            // injectable the instant we enqueue — otherwise arrives before the waiter is registered
+            // and orphans into the inbox while this send blocks to the timeout (the enqueue-before-
+            // open race). Opening first also means a throwing onAccepted (fired before enqueue) or an
+            // enqueue failure is safely closed by the finally below: nothing is left queued, and the
+            // failed send leaves no stale waiter behind.
+            CompletableFuture<Rendezvous.Resolution> reply = rendezvous.open(target);
+            try {
+                // The send has won the lock; the accepted-delivery hook records delegator ownership
+                // here (CB-548). It runs BEFORE enqueue so a throwing hook — onAccepted is now a
+                // public callback — fails the send without queuing a message that would orphan.
+                if (onAccepted != null) {
+                    onAccepted.run();
+                }
+                CompletableFuture<Void> delivered = injector.enqueue(target, content);
+                try {
+                    Rendezvous.Resolution r = reply.get(remainingMillis(deadlineNanos), TimeUnit.MILLISECONDS);
+                    return recorded(new Reply(outcomeOf(r.kind()), r.text(), r.turnId()));
+                } catch (TimeoutException e) {
+                    boolean wasDelivered = delivered.isDone() && !delivered.isCompletedExceptionally();
+                    log.debug("send to {} timed out (delivered={})", target, wasDelivered);
+                    return recorded(new Reply(
+                            wasDelivered ? Outcome.TIMED_OUT_WORKING : Outcome.TIMED_OUT_QUEUED, null));
+                } catch (ExecutionException e) {
+                    Throwable cause = e.getCause();
+                    throw cause instanceof RuntimeException re ? re : new IllegalStateException(cause);
+                } catch (InterruptedException e) {
+                    Thread.currentThread().interrupt();
+                    throw new IllegalStateException("interrupted awaiting reply from " + target, e);
+                }
+            } finally {
+                rendezvous.close(target, reply);
+            }
+        } finally {
+            lock.unlock();
+        }
+    }
+
+    /**
+     * A worker's mid-turn question (CB-205 reverse rendezvous): surface {@code question} to the
+     * primary by resolving its open blocking {@code bridge_send}, then block this (worker) call until
+     * the primary answers via {@link #answer} or {@code timeoutMillis} elapses. Identity is the
+     * worker's own session — it does not address the primary.
+     *
+     * <p>Returns {@link AskOutcome#NO_WAITER} when no delegation is open to surface the question to
+     * (nothing to answer it), {@link AskOutcome#ANSWERED} with the primary's answer, or
+     * {@link AskOutcome#TIMED_OUT} if the primary stayed silent. The worker resumes its turn either
+     * way — an answered ask hands back the answer; an unanswered one leaves it to proceed alone.
+     */
+    public AskResult ask(String workerSession, String question, long timeoutMillis) {
+        Rendezvous.AskTicket ticket = rendezvous.openAsk(workerSession);
+        // Only the freshly-opening caller surfaces the question; a coalesced duplicate simply blocks on
+        // the shared answer future that the fresh owner is already responsible for.
+        if (ticket.fresh()) {
+            // Register the reverse waiter first, then surface the question — so the answer, which can
+            // arrive the instant the primary reacts, always finds an open waiter to resolve.
+            if (!rendezvous.resolveQuestion(workerSession, question, ticket.turnId())) {
+                rendezvous.closeAsk(ticket.turnId());
+                return new AskResult(AskOutcome.NO_WAITER, null); // no primary is blocked on this worker
+            }
+        }
+        try {
+            String answer = ticket.answer().get(timeoutMillis, TimeUnit.MILLISECONDS);
+            return new AskResult(AskOutcome.ANSWERED, answer);
+        } catch (TimeoutException e) {
+            log.debug("bridge_ask from {} went unanswered in {}ms", workerSession, timeoutMillis);
+            return new AskResult(AskOutcome.TIMED_OUT, null);
+        } catch (ExecutionException e) {
+            Throwable cause = e.getCause();
+            throw cause instanceof RuntimeException re ? re : new IllegalStateException(cause);
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+            throw new IllegalStateException("interrupted awaiting the primary's answer for " + workerSession, e);
+        } finally {
+            // Only the fresh owner tears down the shared turn; a duplicate must leave it open.
+            if (ticket.fresh()) {
+                rendezvous.closeAsk(ticket.turnId());
+            }
+        }
+    }
+
+    /**
+     * The primary's answer to a worker's {@code bridge_ask} (CB-205): resolve the worker's blocked
+     * question identified by {@code turnId}, then — like a fresh {@link #send} — block for the worker's
+     * eventual {@code bridge_reply} as it finishes the resumed turn. The worker session is derived from
+     * {@code turnId}, never a caller argument.
+     *
+     * <p>Unlike {@link #send} this does not re-inject through the {@link Injector}: the worker is
+     * mid-turn (already picked up), so the answer flows back through its own open {@code bridge_ask}
+     * call, not a new status-gated delivery. The forward waiter is opened <em>before</em> the worker
+     * is unblocked so a reply that lands the instant it resumes is not lost.
+     */
+    public Reply answer(String turnId, String content, long timeoutMillis) {
+        String workerSession = rendezvous.askSession(turnId);
+        if (workerSession == null) {
+            return new Reply(Outcome.STALE_TURN, null); // the ask lapsed (timed out or already answered)
+        }
+        long deadlineNanos = System.nanoTime() + timeoutMillis * 1_000_000L;
+        ReentrantLock lock = sessionLocks.computeIfAbsent(workerSession, _ -> new ReentrantLock());
+        if (!tryLock(lock, remainingMillis(deadlineNanos))) {
+            return new Reply(Outcome.BUSY, null);
+        }
+        try {
+            CompletableFuture<Rendezvous.Resolution> reply = rendezvous.open(workerSession);
+            if (!rendezvous.answerAsk(turnId, content)) {
+                rendezvous.close(workerSession, reply);
+                return new Reply(Outcome.STALE_TURN, null); // lapsed between the lookup and the unblock
+            }
+            try {
+                Rendezvous.Resolution r = reply.get(remainingMillis(deadlineNanos), TimeUnit.MILLISECONDS);
+                return new Reply(outcomeOf(r.kind()), r.text(), r.turnId());
+            } catch (TimeoutException e) {
+                // The worker resumed but hasn't replied yet — no completion fallback arms an answered
+                // turn (it never re-entered the injector), so a silent worker rides out the window.
+                return new Reply(Outcome.TIMED_OUT_WORKING, null);
+            } catch (ExecutionException e) {
+                Throwable cause = e.getCause();
+                throw cause instanceof RuntimeException re ? re : new IllegalStateException(cause);
+            } catch (InterruptedException e) {
+                Thread.currentThread().interrupt();
+                throw new IllegalStateException("interrupted awaiting reply from " + workerSession, e);
+            } finally {
+                rendezvous.close(workerSession, reply);
+            }
+        } finally {
+            lock.unlock();
+        }
+    }
+
+    /**
+     * Fire-and-poll variant of {@link #send}: deliver {@code content} to {@code target} on a
+     * background virtual thread and return immediately with a ticket to {@link #poll}. This is how a
+     * long task is delegated without tripping the caller's MCP client call timeout.
+     *
+     * @return the ticket to poll for the eventual result
+     */
+    public String sendAsync(String target, String content) {
+        return sendAsync(target, content, null);
+    }
+
+    /**
+     * As {@link #sendAsync(String, String)}, with the accepted-delivery hook of
+     * {@link #send(String, String, long, Runnable)} — the running {@code send} invokes {@code onAccepted}
+     * the moment it becomes the accepted target turn, so async flooding records delegator ownership
+     * exactly as the blocking path does (CB-548).
+     *
+     * @return the ticket to poll for the eventual result
+     */
+    public String sendAsync(String target, String content, Runnable onAccepted) {
+        String ticket = "task-" + ticketSeq.incrementAndGet();
+        CompletableFuture<Reply> future = CompletableFuture.supplyAsync(
+                () -> send(target, content, ASYNC_TIMEOUT_MS, onAccepted), asyncExecutor);
+        tasks.put(ticket, new Task(target, future, System.nanoTime()));
+        pruneTerminalTickets();
+        log.debug("async send {} -> {}", ticket, target);
+        return ticket;
+    }
+
+    /**
+     * Snapshot the state of an async delegation. Returns {@code null} for an unknown/expired ticket;
+     * otherwise a {@link Phase#PENDING} view (with the live worker status as detail), a
+     * {@link Phase#DONE} view carrying the reply, or a {@link Phase#FAILED} view with the reason.
+     */
+    public TaskView poll(String ticket) {
+        Task task = tasks.get(ticket);
+        if (task == null) {
+            return null;
+        }
+        CompletableFuture<Reply> f = task.future();
+        if (!f.isDone()) {
+            return new TaskView(ticket, Phase.PENDING, null, null, "worker " + liveStatus(task.target()));
+        }
+        Reply r;
+        try {
+            r = f.getNow(null);
+        } catch (CompletionException | java.util.concurrent.CancellationException e) {
+            Throwable cause = (e instanceof CompletionException ce && ce.getCause() != null) ? ce.getCause() : e;
+            return new TaskView(ticket, Phase.FAILED, null, null, cause.getMessage());
+        }
+        if (r.completed()) {
+            String source = r.outcome() == Outcome.REPLIED ? "reply" : "transcript";
+            return new TaskView(ticket, Phase.DONE, r.text(), source, null);
+        }
+        // A wedged worker (CB-109) carries the error context as its reason; the timeout/busy
+        // outcomes carry none, so fall back to the outcome name.
+        String detail = r.outcome() == Outcome.WORKER_FAILED && r.text() != null
+                ? r.text()
+                : "no reply — " + r.outcome().name().toLowerCase();
+        return new TaskView(ticket, Phase.FAILED, null, null, detail);
+    }
+
+    /** Best-effort live worker status for a pending poll; never throws (a lookup error is just noise). */
+    private String liveStatus(String target) {
+        try {
+            return agents.status(target).name().toLowerCase();
+        } catch (RuntimeException e) {
+            return "unknown";
+        }
+    }
+
+    /** Drop finished tickets older than the TTL so the registry cannot grow without bound. */
+    private void pruneTerminalTickets() {
+        long cutoff = System.nanoTime() - TICKET_TTL_NANOS;
+        tasks.values().removeIf(t -> t.future().isDone() && t.createdNanos() < cutoff);
+    }
+
+    /** Release the async executor. */
+    public void close() {
+        asyncExecutor.shutdown();
+    }
+
+    /** Map a rendezvous {@link Rendezvous.Kind} onto its send {@link Outcome} (shared by send/answer). */
+    private static Outcome outcomeOf(Rendezvous.Kind kind) {
+        return switch (kind) {
+            case REPLY -> Outcome.REPLIED;
+            case COMPLETION -> Outcome.COMPLETED_UNREPLIED;
+            case FAILED -> Outcome.WORKER_FAILED;
+            case QUESTION -> Outcome.QUESTION;
+        };
+    }
+
+    private static boolean tryLock(ReentrantLock lock, long millis) {
+        try {
+            return lock.tryLock(Math.max(0, millis), TimeUnit.MILLISECONDS);
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+            throw new IllegalStateException("interrupted awaiting the session send lock", e);
+        }
+    }
+
+    private static long remainingMillis(long deadlineNanos) {
+        return (deadlineNanos - System.nanoTime()) / 1_000_000L;
+    }
+}

bridged/src/main/java/dev/ltms/bridged/msg/Rendezvous.java

@@ -0,0 +1,231 @@
+package dev.ltms.bridged.msg;
+
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicLong;
+
+/**
+ * The reply rendezvous: where a blocking {@code bridge_send} awaits how the worker's delegated turn
+ * ends. The sending (primary) request thread {@link #open}s a waiter; it is resolved either by the
+ * worker's explicit {@code bridge_reply} ({@link #resolve}, arriving on a different thread via
+ * {@code POST /sessions/{id}/reply}) or — the CB-106 fallback — by the injector observing the
+ * worker's delegated turn return to idle without a reply ({@link #resolveCompletion}).
+ *
+ * <p>At most one waiter per session — {@link MessageService} serializes sends per session, so a
+ * resolution maps unambiguously to the one outstanding send and cannot be captured by another.
+ *
+ * <p><strong>Waiter identity (CB-116).</strong> The completion/failure fallbacks run asynchronously
+ * and can fire <em>after</em> the turn they belong to has already been resolved by an explicit reply
+ * and a <em>next</em> send has opened its own waiter on the same session. Resolving "whatever waiter
+ * is registered now" would then land turn N's stale scrape on turn N+1's send. So those fallbacks
+ * resolve a <em>specific</em> {@link CompletableFuture} captured when their turn was delivered
+ * ({@link #resolveCompletion(CompletableFuture, String)} /
+ * {@link #resolveFailure(CompletableFuture, String)}): a no-op if that waiter was already resolved,
+ * and it can never touch a later send's waiter.
+ */
+public final class Rendezvous {
+
+    /** How a delegated turn ended (or paused). */
+    public enum Kind {
+        /** The worker called {@code bridge_reply} with a structured answer. */
+        REPLY,
+        /** The worker's turn finished without a {@code bridge_reply}; {@code text} is a scrape. */
+        COMPLETION,
+        /** The worker ran the turn then wedged (CB-109); {@code text} is the failure context. */
+        FAILED,
+        /**
+         * The worker paused mid-turn to ask the primary a question (CB-205 reverse rendezvous);
+         * {@code text} is the question and {@code turnId} correlates the primary's answer back to
+         * the worker's blocked {@code bridge_ask}. Not terminal — the turn resumes after the answer.
+         */
+        QUESTION
+    }
+
+    /**
+     * The resolved outcome of a send: its {@link Kind}, the associated text, and — only for
+     * {@link Kind#QUESTION} — the {@code turnId} the primary answers with (else {@code null}).
+     */
+    public record Resolution(Kind kind, String text, String turnId) {
+        /** A terminal resolution (reply / completion / failure) with no correlation id. */
+        public Resolution(Kind kind, String text) {
+            this(kind, text, null);
+        }
+    }
+
+    /** A worker's open mid-turn question: the worker session it belongs to and the answer future. */
+    private record AskWaiter(String session, CompletableFuture<String> answer) {
+    }
+
+    /**
+     * Handle to a reverse-rendezvous turn: the {@code turnId}, its answer future, and whether this
+     * call freshly opened it (versus coalescing onto an already-open ask).
+     */
+    public record AskTicket(String turnId, CompletableFuture<String> answer, boolean fresh) {
+    }
+
+    private final ConcurrentHashMap<String, CompletableFuture<Resolution>> waiters = new ConcurrentHashMap<>();
+
+    /** Reverse rendezvous (CB-205): worker questions awaiting the primary's answer, keyed by {@code turnId}. */
+    private final ConcurrentHashMap<String, AskWaiter> asks = new ConcurrentHashMap<>();
+    private final AtomicLong askSeq = new AtomicLong();
+    /** Per-session index of the currently-open ask, so duplicate bridge_ask calls coalesce onto one turn. */
+    private final ConcurrentHashMap<String, String> openAsksBySession = new ConcurrentHashMap<>();
+
+    /**
+     * Register a waiter for {@code session} — the await side of the public {@code resolve*} methods.
+     * The caller must hold that session's send lock.
+     *
+     * <p>Atomic fail-if-present (CB-548): if a waiter is already registered for {@code session}, an
+     * {@link IllegalStateException} is thrown rather than replacing the first — so any future
+     * invariant violation fails loudly instead of silently swapping the waiter another send is
+     * blocked on. {@code MessageService} serializes sends per session (the send lock), so in correct
+     * code a double open is impossible; this is a tripwire for the day that no longer holds.
+     */
+    public CompletableFuture<Resolution> open(String session) {
+        CompletableFuture<Resolution> waiter = new CompletableFuture<>();
+        CompletableFuture<Resolution> existing = waiters.putIfAbsent(session, waiter);
+        if (existing != null) {
+            throw new IllegalStateException(
+                    "rendezvous double-open for session " + session + " — a waiter is already registered");
+        }
+        return waiter;
+    }
+
+    /**
+     * Remove {@code waiter} for {@code session}, only if it is still the registered one. The
+     * symmetric complement of {@link #open}: a terminal send deregisters its waiter so the next
+     * send on the session may {@link #open} a fresh one (CB-548 makes double-open an error, so a
+     * successful {@code open} after a finished turn requires this close to have happened first).
+     */
+    public void close(String session, CompletableFuture<Resolution> waiter) {
+        waiters.remove(session, waiter);
+    }
+
+    /** Whether a send is currently awaiting a resolution for {@code session}. */
+    public boolean isWaiting(String session) {
+        return waiters.containsKey(session);
+    }
+
+    /**
+     * The waiter currently registered for {@code session}, or {@code null} if none is waiting. The
+     * completion/failure fallbacks capture this at delivery time so they can later resolve that exact
+     * send (see the CB-116 note above) rather than whichever send happens to be waiting when they fire.
+     */
+    public CompletableFuture<Resolution> currentWaiter(String session) {
+        return waiters.get(session);
+    }
+
+    /**
+     * Resolve the send awaiting on {@code session} with the worker's explicit reply {@code content}.
+     *
+     * @return {@code true} if a waiter was resolved; {@code false} if none was waiting (a late or
+     *         spurious reply — e.g. the send already timed out)
+     */
+    public boolean resolve(String session, String content) {
+        return complete(session, new Resolution(Kind.REPLY, content));
+    }
+
+    // --- reverse rendezvous (CB-205 bridge_ask) ------------------------------------------------
+
+    /**
+     * Open a reverse-rendezvous waiter for a worker's mid-turn question. If {@code session} already has
+     * an open ask, coalesce onto it (same {@code turnId}, same answer future). Otherwise atomically mint
+     * a fresh {@code turnId}, register it in both the per-turn and per-session indexes, and hand it back
+     * marked fresh. The caller then {@link #resolveQuestion surfaces the question} to the primary and
+     * blocks on the returned future until the primary {@link #answerAsk answers}.
+     */
+    public AskTicket openAsk(String session) {
+        while (true) {
+            AskWaiter[] minted = { null };
+            String turnId = openAsksBySession.computeIfAbsent(session, _ -> {
+                String newTurnId = session + "#" + askSeq.incrementAndGet();
+                CompletableFuture<String> answer = new CompletableFuture<>();
+                AskWaiter waiter = new AskWaiter(session, answer);
+                asks.put(newTurnId, waiter);
+                minted[0] = waiter;
+                return newTurnId;
+            });
+            if (minted[0] != null) {
+                return new AskTicket(turnId, minted[0].answer(), true);
+            }
+            AskWaiter existing = asks.get(turnId);
+            if (existing != null) {
+                return new AskTicket(turnId, existing.answer(), false);
+            }
+            // A close raced and removed the waiter after we read the turnId; clear the stale index entry
+            // and retry so a fresh ask is always backed by a registered waiter.
+            openAsksBySession.remove(session, turnId);
+        }
+    }
+
+    /**
+     * Surface a worker's mid-turn {@code question} by resolving the primary's open {@code bridge_send}
+     * with a {@link Kind#QUESTION} carrying {@code turnId}. Same session-keyed semantics as
+     * {@link #resolve}: the one outstanding send for {@code session} unblocks with the question.
+     *
+     * @return {@code true} if a send was awaiting (the question reached the primary); {@code false}
+     *         if none was (no delegation is open to answer it)
+     */
+    public boolean resolveQuestion(String session, String question, String turnId) {
+        return complete(session, new Resolution(Kind.QUESTION, question, turnId));
+    }
+
+    /** The worker session an outstanding ask {@code turnId} belongs to, or {@code null} if unknown/lapsed. */
+    public String askSession(String turnId) {
+        AskWaiter w = asks.get(turnId);
+        return w == null ? null : w.session();
+    }
+
+    /**
+     * Resolve a worker's blocked {@code bridge_ask} with the primary's {@code answer}, unblocking it
+     * to resume its turn.
+     *
+     * @return {@code true} if the ask was still open and got the answer; {@code false} if the
+     *         {@code turnId} is unknown or the ask already lapsed (timed out / was answered)
+     */
+    public boolean answerAsk(String turnId, String answer) {
+        AskWaiter w = asks.get(turnId);
+        return w != null && w.answer().complete(answer);
+    }
+
+    /** Drop a reverse-rendezvous turn once its {@code bridge_ask} has resolved (answered or lapsed). */
+    public void closeAsk(String turnId) {
+        AskWaiter w = asks.get(turnId);
+        if (w == null) {
+            return;
+        }
+        // Remove the session index first and only if it still points to this turn, so a concurrent
+        // fresh ask cannot inherit a waiter we are about to drop.
+        openAsksBySession.remove(w.session(), turnId);
+        asks.remove(turnId);
+    }
+
+    /**
+     * Resolve a specific captured {@code waiter} as a completion (the delegated turn finished with no
+     * {@code bridge_reply}); {@code text} is the scraped transcript tail. The waiter is the one
+     * captured when this turn was delivered, so a late completion for turn N cannot land on turn N+1's
+     * send (CB-116). A no-op if that waiter was already resolved — a raced {@code bridge_reply} wins.
+     *
+     * @return {@code true} if this call resolved the waiter, {@code false} if it was null or already resolved
+     */
+    public boolean resolveCompletion(CompletableFuture<Resolution> waiter, String text) {
+        return waiter != null && waiter.complete(new Resolution(Kind.COMPLETION, text));
+    }
+
+    /**
+     * Resolve a specific captured {@code waiter} as a failure — the worker ran the turn but wedged in
+     * an unrecoverable state (CB-109); {@code reason} is the failure context (e.g. the error screen).
+     * Like {@link #resolveCompletion(CompletableFuture, String)} it targets the exact captured send
+     * (CB-116). A no-op if that waiter was already resolved — first resolution wins.
+     *
+     * @return {@code true} if this call resolved the waiter, {@code false} if it was null or already resolved
+     */
+    public boolean resolveFailure(CompletableFuture<Resolution> waiter, String reason) {
+        return waiter != null && waiter.complete(new Resolution(Kind.FAILED, reason));
+    }
+
+    private boolean complete(String session, Resolution resolution) {
+        CompletableFuture<Resolution> waiter = waiters.get(session);
+        return waiter != null && waiter.complete(resolution);
+    }
+}

bridged/src/main/java/dev/ltms/bridged/msg/ReplyInbox.java

@@ -0,0 +1,51 @@
+package dev.ltms.bridged.msg;
+
+import java.util.List;
+
+/**
+ * Holds terminal worker→primary replies that arrive with no live send to resolve, keyed by worker
+ * session (target), until the primary drains them. Soft-state in Stage 1 (in-memory, lost on restart);
+ * the Stage 2 AMQP adapter implements the same contract with cross-restart durability.
+ *
+ * <p><strong>This interface is the port.</strong> {@link InMemoryReplyInbox} is the Stage-1 adapter;
+ * an AMQP-backed adapter (Stage 2) must implement the same contract (idempotent publish, FIFO peek,
+ * at-least-once ack).
+ *
+ * <p><strong>Ownership is explicit.</strong> A gateway {@link #own owns} the inbox for each agent it
+ * spawned; only the owner consumes and drains it. {@link #publish} sends a reply to the target's
+ * inbox but does <em>not</em> imply ownership or start a consumer. This separation is required by
+ * CB-308 federation, where one gateway may publish to an agent owned by another gateway.
+ */
+public interface ReplyInbox {
+
+    /** A queued reply: an idempotency id, the worker session it came from, and the reply text. */
+    record InboxMessage(String msgId, String target, String content) {}
+
+    /**
+     * Start owning (consuming) the inbox for {@code target}. Idempotent: multiple calls for the same
+     * target are no-ops. The owner is the only gateway that may {@link #peek} and {@link #ack} replies
+     * for this target.
+     */
+    void own(String target);
+
+    /**
+     * Stop owning (consuming) the inbox for {@code target}. Idempotent. Any replies held locally but
+     * not yet acked are dropped from the local snapshot; the underlying durable queue keeps
+     * unacked messages for redelivery when the target is re-owned.
+     */
+    void release(String target);
+
+    /**
+     * Queue {@code content} from worker {@code target} under {@code msgId}. Idempotent: publishing an
+     * already-present {@code msgId} for {@code target} is a no-op (dedup), so an at-least-once Stage-2
+     * redelivery cannot double-queue. Publishing does <em>not</em> imply ownership and must not start a
+     * consumer.
+     */
+    void publish(String target, String msgId, String content);
+
+    /** Non-destructive snapshot of pending replies for {@code target} (FIFO), empty list if none. */
+    List<InboxMessage> peek(String target);
+
+    /** Remove the reply {@code msgId} for {@code target} once the primary has taken it. No-op if absent. */
+    void ack(String target, String msgId);
+}

bridged/src/main/java/dev/ltms/bridged/msg/ReplyPushLoop.java

@@ -0,0 +1,199 @@
+package dev.ltms.bridged.msg;
+
+import dev.ltms.bridged.herdr.AgentControl;
+import dev.ltms.bridged.herdr.AgentStatus;
+import dev.ltms.bridged.mcp.PrimaryRegistry;
+import dev.ltms.bridged.metrics.BridgedMetrics;
+import dev.ltms.bridged.metrics.Metrics;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Mechanism (b) of CB-307: a dedicated, status-gated push loop that nudges the primary's own
+ * herdr pane when a worker reply lands with no live {@code bridge_send} to resolve it.
+ *
+ * <p>The loop is triggered by {@link #onReplyQueued(String)} (called from
+ * {@link MessageService#reply} after the durable inbox publish). It checks four conditions
+ * at each tick via {@link #decide(String, int)}, then either injects a drain nudge,
+ * waits for the primary to become injectable, or stops reminding.
+ *
+ * <p>Bounded: at most {@link #maxReminders} nudges per target, with a configurable backoff
+ * between them. The reply is never lost — the durable inbox is the backstop.
+ */
+public final class ReplyPushLoop {
+
+    private static final Logger log = LoggerFactory.getLogger(ReplyPushLoop.class);
+    static final String NUDGE_FORMAT = "Worker %s returned a reply — run bridge_poll(target=%s) to collect it";
+
+    private final PrimaryRegistry primaryRegistry;
+    private final AgentControl agents;
+    private final ReplyInbox inbox;
+    private final ScheduledExecutorService scheduler;
+    private final int maxReminders;
+    private final long backoffMs;
+    private final Metrics metrics; // CB-512: nullable — no registry in unit tests
+
+    /** Track targets that have an active schedule. */
+    private final ConcurrentHashMap<String, Boolean> activeTargets = new ConcurrentHashMap<>();
+
+    public ReplyPushLoop(PrimaryRegistry primaryRegistry, AgentControl agents, ReplyInbox inbox,
+                         ScheduledExecutorService scheduler,
+                         int maxReminders, long backoffMs) {
+        this(primaryRegistry, agents, inbox, scheduler, maxReminders, backoffMs, null);
+    }
+
+    /** As above, with a metric registry (CB-512) so push outcomes are counted. */
+    public ReplyPushLoop(PrimaryRegistry primaryRegistry, AgentControl agents, ReplyInbox inbox,
+                         ScheduledExecutorService scheduler,
+                         int maxReminders, long backoffMs, Metrics metrics) {
+        this.primaryRegistry = primaryRegistry;
+        this.agents = agents;
+        this.inbox = inbox;
+        this.scheduler = scheduler;
+        this.maxReminders = maxReminders;
+        this.backoffMs = backoffMs;
+        this.metrics = metrics;
+    }
+
+    /** Count one nudge outcome when a registry is wired; a no-op in unit tests. */
+    private void countNudge(String outcome) {
+        if (metrics != null) {
+            metrics.inc(BridgedMetrics.PUSH_NUDGES, "outcome", outcome);
+        }
+    }
+
+    // --- decision logic (package-private for unit-testing) -------------------------------------
+
+    /** The action the loop should take for a target at the given reminder count. */
+    enum Action { INJECT, WAIT_BUSY, STOP }
+
+    /**
+     * Pure decision function: examine the current state and return what the loop should do.
+     *
+     * @param target        the worker session (target terminal id)
+     * @param reminderCount how many nudges have been sent so far for this target
+     * @return the action the caller should take
+     */
+    Action decide(String target, int reminderCount) {
+        // CB-532: the destination is per-delegation — the lead that sent this worker its work, not
+        // "the primary". With two leads orchestrating one fleet the singular question has no right
+        // answer, and answering it anyway interrupted whichever lead happened to call bridge_send
+        // first with results it never asked for.
+        var nudgeTarget = primaryRegistry.nudgeTargetFor(target);
+        if (nudgeTarget.isEmpty()) {
+            log.debug("push: no lead is known to be waiting on {}, stopping reminder", target);
+            return Action.STOP;
+        }
+        if (inbox.peek(target).isEmpty()) {
+            log.debug("push: inbox empty for {}, stopping reminder", target);
+            return Action.STOP;
+        }
+        if (reminderCount >= maxReminders) {
+            log.debug("push: reminder cap ({}) reached for {}, stopping", maxReminders, target);
+            countNudge("exhausted");
+            return Action.STOP;
+        }
+        String leadTerminal = nudgeTarget.get();
+        AgentStatus status;
+        try {
+            status = agents.status(leadTerminal);
+        } catch (RuntimeException e) {
+            log.debug("push: status check failed for lead {}, will retry", leadTerminal, e);
+            return Action.WAIT_BUSY;
+        }
+        if (status.injectable()) {
+            return Action.INJECT;
+        }
+        log.debug("push: lead {} is {} (not injectable), waiting", leadTerminal, status);
+        return Action.WAIT_BUSY;
+    }
+
+    // --- public entrypoint ---------------------------------------------------------------------
+
+    /**
+     * Called when a reply is queued for {@code target}. Idempotent per target: a second call while
+     * a schedule is active is a no-op. The schedule nudges the primary, then schedules a follow-up
+     * check (reminder on backoff, or re-check on WAIT_BUSY), until the inbox is empty or the cap
+     * is reached.
+     */
+    public void onReplyQueued(String target) {
+        if (activeTargets.putIfAbsent(target, Boolean.TRUE) != null) {
+            log.debug("push: already active for {}, ignoring duplicate trigger", target);
+            return; // already scheduled
+        }
+        log.debug("push: starting reminder loop for {}", target);
+        scheduleNext(target, 0);
+    }
+
+    /** Execute one loop tick — called on the scheduler thread. */
+    private void tick(String target, int reminderCount) {
+        var action = decide(target, reminderCount);
+        switch (action) {
+            case INJECT -> {
+                injectNudge(target, reminderCount);
+                scheduleNext(target, reminderCount + 1);
+            }
+            // Re-check after the configured backoff; the primary may become injectable soon.
+            case WAIT_BUSY -> scheduleNext(target, reminderCount);
+            case STOP -> {
+                activeTargets.remove(target);
+                log.debug("push: reminder loop ended for {}", target);
+            }
+        }
+    }
+
+    /** Send the nudge and log the event. */
+    private void injectNudge(String target, int reminderCount) {
+        // Re-read rather than threading it down from decide(): the delegating lead can change
+        // between the decision and the injection, and the nudge should follow the current one.
+        var lead = primaryRegistry.nudgeTargetFor(target);
+        if (lead.isEmpty()) {
+            log.debug("push: lead for {} disappeared before the nudge could be sent", target);
+            return;
+        }
+        String leadTerminal = lead.get();
+        String nudge = NUDGE_FORMAT.formatted(target, target);
+        try {
+            agents.send(leadTerminal, nudge);
+            log.debug("push: nudge {}/{} sent to lead {} for target {}",
+                    reminderCount + 1, maxReminders, leadTerminal, target);
+            countNudge("delivered");
+        } catch (RuntimeException e) {
+            log.warn("push: failed to nudge lead {} for target {} (reminder {}/{}): {}",
+                    leadTerminal, target, reminderCount + 1, maxReminders, e.toString());
+        }
+    }
+
+    /** Schedule the next tick on the scheduler thread pool. */
+    private void scheduleNext(String target, int nextReminderCount) {
+        scheduler.schedule(() -> tick(target, nextReminderCount), backoffMs, TimeUnit.MILLISECONDS);
+    }
+
+    // --- lifecycle -----------------------------------------------------------------------------
+
+    /**
+     * Whether any reminder loop is currently active for some target (CB-551). The idle-lead heartbeat
+     * uses this to stand aside: while the push loop is actively nudging the lead, a concurrent
+     * heartbeat injection would start a second competing turn in the same pane — racing loops multiply
+     * turns and context burn. "Active" means a schedule exists in {@link #activeTargets}; the set is
+     * bounded by what has been triggered, not by any persistent state.
+     */
+    public boolean isActive() {
+        return !activeTargets.isEmpty();
+    }
+
+    /** Shut down the scheduler. Outstanding reminders are cancelled. */
+    public void stop() {
+        scheduler.shutdownNow();
+        activeTargets.clear();
+    }
+
+    /** @see #stop() */
+    public void close() {
+        stop();
+    }
+}

bridged/src/main/java/dev/ltms/bridged/peer/Capability.java

@@ -0,0 +1,58 @@
+package dev.ltms.bridged.peer;
+
+/**
+ * Declared capabilities of a {@link PeerLauncher}. The protocol is the union across all
+ * configured launchers; a verb invoked against a peer that lacks the capability returns a clean
+ * "unsupported for this peer" rather than a crash. Capabilities keep the protocol honest as peers
+ * diversify and prevent the core from assuming "every peer is a Claude in a worktree."
+ */
+public enum Capability {
+
+    /**
+     * The peer supports {@code bridge_ask} rendezvous — pausing its delegated turn to ask
+     * the primary a question, then resuming once answered. All Claude Code peers support this.
+     */
+    MID_TURN_ASK,
+
+    /**
+     * The peer can open its own PR at the end of an implementation turn (CB-302). Opt-in per
+     * profile: granted only when the profile carries a git-forge token ({@code gitTokenEnv}).
+     */
+    SELF_PR,
+
+    /**
+     * The peer can run inside a provisioned isolated git worktree. All CLI-based peers support
+     * this since their cwd is set at spawn time.
+     */
+    WORKTREE,
+
+    /**
+     * The peer can discard its current conversation context without starting a delegated bridge
+     * turn. The command or API used to do that is adapter-specific.
+     */
+    CONTEXT_RESET,
+
+    /**
+     * The spawner can reconcile orphaned peers on boot — workers that outlived a prior daemon
+     * process and whose pane ids died with it (CB-117). Claude Code over herdr supports this
+     * via name-based matching against the herdr agent list.
+     */
+    ORPHAN_REAP,
+
+    /**
+     * The peer surfaces the bridge's logical name ({@link SpawnRequest#sessionName()}) in its own
+     * UI at spawn — e.g. Claude Code's {@code -n} display name, which shows in the prompt box, the
+     * {@code /resume} picker, and the terminal title. This is what lets an operator tell the
+     * bridge's worker apart from a user's own session in the same terminal after a restart.
+     */
+    SESSION_NAME,
+
+    /**
+     * The peer can be relaunched onto a prior conversation via that conversation's own session id
+     * ({@link SpawnRequest#resumeSessionId()}) — e.g. Claude Code's {@code -r}, which adopts the id
+     * as the agent's own identity rather than starting a new conversation. A launcher that declares
+     * this mints/resolves that id at spawn and exposes it on the returned
+     * {@link PeerHandle#agentSessionId()}, so a later resume addresses the same conversation.
+     */
+    SESSION_RESUME
+}

bridged/src/main/java/dev/ltms/bridged/peer/MemberRole.java

@@ -0,0 +1,122 @@
+package dev.ltms.bridged.peer;
+
+import java.util.Locale;
+
+/**
+ * What a member is <em>for</em> — the contract it runs under.
+ *
+ * <p>A member is anything a lead spawns. Every member carries two independent attributes:
+ *
+ * <ul>
+ *   <li><b>role</b> (this enum) — <em>which contract</em>: the launch charter it is given, the role
+ *       file it reads, the playbook skill it loads, and its authorization row.</li>
+ *   <li><b>profile</b> (a {@code profiles:} key) — <em>which backend</em>: model, CLI adapter,
+ *       credentials, cost.</li>
+ * </ul>
+ *
+ * <p>These are separate axes on purpose. A {@code REVIEWER} may run on the same profile as the
+ * {@code DEV} whose diff it reviews — same backend, different contract. That case is what proves
+ * role and profile cannot be collapsed into one field.
+ *
+ * <p>A lead is deliberately <em>not</em> a role here. A lead is not spawned: it is a pre-existing,
+ * human-facing session that config recognises. Only spawned peers have a member role.
+ */
+public enum MemberRole {
+
+    /**
+     * Refines a ticket before anyone implements it: scope, acceptance criteria, risks, unit split.
+     *
+     * <p>Reads the repo and writes analysis. Never commits code and never opens a pull request —
+     * an architect that starts implementing has stopped doing the job that makes it useful.
+     *
+     * <p>Architects are the one member kind declared in config, because a lead addresses the same
+     * slots across many tickets and needs a stable name for them.
+     */
+    ARCHITECT,
+
+    /**
+     * Implements one unit of work: provisions a worktree, writes the code, commits, pushes, and
+     * opens its own pull request.
+     *
+     * <p>Never merges. The lead is the gate, and a member that merged its own work would remove the
+     * only independent check in the flow.
+     */
+    DEV,
+
+    /**
+     * Reviews a diff it did not write and reports one structured finding.
+     *
+     * <p>Never commits, never merges, and is never the member that wrote the scope under review.
+     * Briefed from the diff rather than from the implementer's rationale, because that rationale
+     * carries the same blind spot that produced the bug.
+     */
+    REVIEWER;
+
+    /** The lowercase spelling used in config and on the wire ({@code architect}, {@code dev}, …). */
+    public String wireName() {
+        return name().toLowerCase(Locale.ROOT);
+    }
+
+    /**
+     * The {@code fleet:} block that holds this role's pool — {@code architects},
+     * {@code developers}, {@code reviewers}.
+     *
+     * <p>Plural, and not always the wire name: the pool of things a {@code dev} may run on reads
+     * naturally as {@code developers:}. The wire name stays the singular {@code dev}, because that
+     * is what a tab label and a roster row say.
+     */
+    public String configKey() {
+        return switch (this) {
+            case ARCHITECT -> "architects";
+            case DEV -> "developers";
+            case REVIEWER -> "reviewers";
+        };
+    }
+
+    /**
+     * The role owning the {@code fleet:} pool named {@code key}, or {@code null} when the key is not
+     * a role pool ({@code leaders}, {@code tabLabel}, …). Null rather than a throw: callers use this
+     * to sort a fleet block's children, where a non-pool key is normal rather than an error.
+     */
+    public static MemberRole fromConfigKey(String key) {
+        if (key == null) {
+            return null;
+        }
+        String k = key.trim().toLowerCase(Locale.ROOT);
+        for (MemberRole r : values()) {
+            if (r.configKey().equals(k)) {
+                return r;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Parse a config/wire spelling, case-insensitively.
+     *
+     * @param s the spelling to parse
+     * @return the matching role
+     * @throws IllegalArgumentException when {@code s} is null, blank, or not a known role — the
+     *                                  message lists the valid spellings, because a typo'd role in
+     *                                  config should fail at startup with the fix in the error
+     */
+    public static MemberRole parse(String s) {
+        if (s != null && !s.isBlank()) {
+            String t = s.trim().toLowerCase(Locale.ROOT);
+            for (MemberRole r : values()) {
+                if (r.wireName().equals(t)) {
+                    return r;
+                }
+            }
+        }
+        StringBuilder valid = new StringBuilder();
+        for (MemberRole r : values()) {
+            if (!valid.isEmpty()) {
+                valid.append(", ");
+            }
+            valid.append(r.wireName());
+        }
+        throw new IllegalArgumentException(
+                "unknown member role '" + s + "'; valid roles are: " + valid);
+    }
+}

bridged/src/main/java/dev/ltms/bridged/peer/PeerHandle.java

@@ -0,0 +1,70 @@
+package dev.ltms.bridged.peer;
+
+/**
+ * An opaque handle returned by {@link PeerLauncher#spawn(SpawnRequest)}. The core routes on
+ * {@link #id()} (the registry/routing key) and uses {@link #terminalId()} for session tracking;
+ * launcher-private coordinates beyond these are reachable through the concrete implementation.
+ *
+ * <p>A {@link PeerHandle} is returned <em>after</em> the peer process is live — the launcher
+ * has already completed subscription-guarded env/vfs setup, process start, and placement. The
+ * handle is a ticket the core exchanges for the running peer, not a lazy/delayed reference.
+ */
+public interface PeerHandle {
+
+    /**
+     * The registry/routing key — an opaque, launcher-assigned identifier (CB-519). Multiple
+     * daemon processes may run on one host, so the contract is <em>host-unique</em>, not merely
+     * process-unique: the herdr-backed launcher mints a fresh UUID per spawn, and a non-herdr
+     * launcher is likewise expected to return an identifier that cannot collide across processes
+     * on the same host. This id is the routing key and is deliberately decoupled from any launcher
+     * transport coordinate (e.g. a herdr pane id), which stays launcher-private. Guaranteed to be
+     * non-null and unique among live peers on the host.
+     */
+    String id();
+
+    /**
+     * The transport-level session identifier used for message routing and presence tracking.
+     * For the herdr launcher this is the herdr terminal UUID. A non-herdr launcher may return
+     * its own analogous identifier, or {@code null} if the concept does not apply.
+     */
+    default String terminalId() {
+        return null;
+    }
+
+    /**
+     * The worker profile that spawned this peer, if the launcher resolved one. A launcher that
+     * performs dynamic profile selection (e.g. CB-518 weighted placement) sets this so the
+     * session registry records the actual profile rather than the requested/default one.
+     *
+     * @return the profile name, or {@code null} when the launcher leaves it unspecified
+     */
+    default String profile() {
+        return null;
+    }
+
+    /**
+     * The bridge's logical name for this session, as assigned at spawn
+     * ({@link SpawnRequest#sessionName()}). Stable across restarts and meaningful to an operator,
+     * unlike the transport identifiers above; a launch with no name leaves the peer's display
+     * identity to the launcher to derive.
+     *
+     * @return the bridge-assigned logical session name, or {@code null} if none was assigned
+     */
+    default String sessionName() {
+        return null;
+    }
+
+    /**
+     * The peer's OWN session id — the handle that resumes this conversation later (the id a
+     * later {@link Capability#SESSION_RESUME resume} spawn would pass back). Null when the adapter
+     * cannot determine it — the contract for an adapter that declines
+     * {@link Capability#SESSION_RESUME}; an adapter that declares that capability returns this
+     * non-null for a spawn that requested session identity, because it knows the id before the
+     * peer has written anything.
+     *
+     * @return the peer's own session id, or {@code null} when not determinable
+     */
+    default String agentSessionId() {
+        return null;
+    }
+}

bridged/src/main/java/dev/ltms/bridged/peer/PeerLauncher.java

@@ -0,0 +1,94 @@
+package dev.ltms.bridged.peer;
+
+import java.util.List;
+import java.util.Set;
+
+/**
+ * SPI for materializing a connected peer — the only way the bridge core creates or tears down
+ * a peer process. Every launcher is a first-party, in-tree adapter selected by (future) profile
+ * config; today's single adapter is the {@code ClaudeCodeLauncher} / Claude Code over herdr.
+ *
+ * <p>The core delegates spawn and teardown to this interface without knowing how the peer is set
+ * up. Environment variables, CLI flags, subscription guards, transport (herdr tab/pane) layout,
+ * and naming conventions are all adapter-private — the core sees only the returned
+ * {@link PeerHandle} whose {@code id()} is the registry/routing key.
+ *
+ * <p>The interface is a superset of what {@code SessionManager} and {@code Bridged.main} call
+ * on the concrete launcher today.
+ */
+public interface PeerLauncher {
+
+    /**
+     * The set of {@link Capability capabilities} this launcher declares. A peer whose profile
+     * opts into a git-forge token should include {@link Capability#SELF_PR}; the base set for
+     * the Claude Code herdr adapter is always {@code MID_TURN_ASK, WORKTREE, ORPHAN_REAP}.
+     */
+    Set<Capability> capabilities();
+
+    /**
+     * {@code profileName}/requestedCwd null/blank → default resolution. Returns after the peer
+     * process is live (env + argv + placement complete). Never returns {@code null}.
+     *
+     * @param req the spawn parameters (profile, requested cwd, caller cwd)
+     * @return a handle whose {@link PeerHandle#id()} is the registry/routing key
+     * @throws IllegalArgumentException if the profile is unknown and no default is configured
+     */
+    PeerHandle spawn(SpawnRequest req);
+
+    /**
+     * The configured worker profile names — the set of names {@code spawn(profileName)} accepts.
+     */
+    Set<String> profiles();
+
+    /**
+     * The profile a no-argument {@link #spawn(SpawnRequest)} uses, or {@code null} if none is configured.
+     */
+    String defaultProfile();
+
+    /**
+     * Resolve the effective working directory for a spawn {@code req} without actually spawning.
+     * Resolution order: requestedCwd → profile cwd → callerCwd → daemon cwd.
+     *
+     * @return the resolved absolute path, never null/blank
+     */
+    String effectiveCwd(SpawnRequest req);
+
+    /**
+     * The parity-overlay file list for {@code profileName} (default list when unset). Used by
+     * worktree provisioning to copy config files into the isolated checkout before spawning.
+     */
+    List<String> parityOverlay(String profileName);
+
+    /**
+     * The set of all agents this launcher currently tracks, transport-specific. Each element
+     * exposes at minimum a pane-like {@code id()} matching this launcher's {@link PeerHandle}
+     * scheme, plus transport-level status. Callers merge this set with the session registry to
+     * build a live roster view.
+     */
+    List<?> list();
+
+    /**
+     * Reap orphaned peers left behind by a prior daemon process. Only peers whose naming scheme
+     * matches this launcher's and whose nonce differs from the current process are eligible.
+     * Best-effort: a failure to list or to stop any one peer is logged and never aborts startup.
+     *
+     * @return the number of orphaned peers reaped
+     */
+    int reapOrphanWorkers();
+
+    /**
+     * Tear a peer down by its registry/routing key ({@link PeerHandle#id()}). Tolerates an
+     * already-gone peer. Also cleans up launcher-private resources (e.g. empty dedicated tabs)
+     * when safe to do so.
+     */
+    void stop(String id);
+
+    /**
+     * Discard the context of the peer identified by {@code id}. Implementations must bypass normal
+     * bridge delivery/turn accounting. Unsupported peer kinds return {@code false} without sending
+     * a guessed command.
+     *
+     * @return {@code true} when a reset was sent and its status transition must settle before reuse
+     */
+    boolean clearContext(String id);
+}

bridged/src/main/java/dev/ltms/bridged/peer/PeerUnreachableException.java

@@ -0,0 +1,18 @@
+package dev.ltms.bridged.peer;
+
+/**
+ * Thrown when a {@link PeerLauncher} starts a peer process but the peer
+ * does not reach an injectable (ready-to-receive) state within the configured
+ * timeout. The launcher MUST clean up any resources it created (pane, tab)
+ * before throwing — no orphaned peer or pane is left behind.
+ *
+ * <p>This is a spawn-time failure, distinct from a post-spawn disconnect.
+ * Callers treat this as a clean spawn error (the peer never materialized
+ * into a usable session), not a mid-life session fault.
+ */
+public final class PeerUnreachableException extends RuntimeException {
+
+    public PeerUnreachableException(String message) {
+        super(message);
+    }
+}

bridged/src/main/java/dev/ltms/bridged/peer/SpawnRequest.java

@@ -0,0 +1,32 @@
+package dev.ltms.bridged.peer;
+
+/**
+ * What a caller asks for when spawning a peer.
+ *
+ * @param profileName     the {@code profiles:} entry to spawn on; {@code null}/blank ⇒ the caller
+ *                        did not choose, and the role's pool supplies the candidates
+ * @param requestedCwd    working directory asked for by the caller ({@code null} ⇒ unset)
+ * @param callerCwd       the caller's own working directory, used when nothing else pins one
+ * @param sessionName     agent session name (CB-547a); {@code null} ⇒ the launcher mints one
+ * @param resumeSessionId prior agent session to resume; {@code null} ⇒ a fresh session
+ * @param role            the contract this member runs under (CB-557). Picks the tab label and,
+ *                        with the profile, the counter its tab number comes from. {@code null} is
+ *                        read as {@link MemberRole#DEV} — an unqualified spawn is a unit of work
+ */
+public record SpawnRequest(String profileName, String requestedCwd, String callerCwd,
+                           String sessionName, String resumeSessionId, MemberRole role) {
+
+    public SpawnRequest {
+        role = (role == null) ? MemberRole.DEV : role;
+    }
+
+    public SpawnRequest(String profileName, String requestedCwd, String callerCwd) {
+        this(profileName, requestedCwd, callerCwd, null, null, null);
+    }
+
+    /** Pre-CB-557 shape: session identity without an explicit role (defaults to {@code dev}). */
+    public SpawnRequest(String profileName, String requestedCwd, String callerCwd,
+                        String sessionName, String resumeSessionId) {
+        this(profileName, requestedCwd, callerCwd, sessionName, resumeSessionId, null);
+    }
+}

bridged/src/main/java/dev/ltms/bridged/placement/FixedPlacementPolicy.java

@@ -0,0 +1,22 @@
+package dev.ltms.bridged.placement;
+
+/**
+ * Backward-compatible placement: an unqualified spawn always resolves to the configured default
+ * profile, exactly as {@code CompositePeerLauncher} did before CB-518. This ignores caps and
+ * reachability so that a pre-existing config behaves identically after upgrade.
+ */
+final class FixedPlacementPolicy implements PlacementPolicy {
+
+    @Override
+    public PlacementCandidate select(PlacementContext ctx) {
+        String d = ctx.defaultProfile();
+        if (d != null && !d.isBlank()) {
+            return new PlacementCandidate(d, null, 1.0f, null);
+        }
+        if (!ctx.candidates().isEmpty()) {
+            PlacementCandidate first = ctx.candidates().getFirst();
+            return new PlacementCandidate(first.profile(), null, first.weight(), first.maxLoad());
+        }
+        throw new PlacementException("no worker profiles configured");
+    }
+}

bridged/src/main/java/dev/ltms/bridged/placement/PlacementCandidate.java

@@ -0,0 +1,20 @@
+package dev.ltms.bridged.placement;
+
+/**
+ * A profile (and, in CB-308, a host) that can be chosen by a {@link PlacementPolicy}.
+ *
+ * <p>Keeping this as a small descriptor rather than a bare profile name lets CB-308 widen
+ * selection to {@code (host, profile)} pairs without changing the policy interface.
+ */
+public record PlacementCandidate(String profile, String host, float weight, Integer maxLoad) {
+
+    /** A candidate with no explicit host (the single-host default) and the given weight/cap. */
+    public static PlacementCandidate profile(String profile, float weight, Integer maxLoad) {
+        return new PlacementCandidate(profile, null, weight, maxLoad);
+    }
+
+    /** A candidate with no explicit host, unit weight, and no cap. */
+    public static PlacementCandidate profile(String profile) {
+        return new PlacementCandidate(profile, null, 1.0f, null);
+    }
+}

bridged/src/main/java/dev/ltms/bridged/placement/PlacementContext.java

@@ -0,0 +1,19 @@
+package dev.ltms.bridged.placement;
+
+import java.util.List;
+import java.util.Set;
+import java.util.function.Function;
+
+/**
+ * Everything a {@link PlacementPolicy} needs to make one selection.
+ *
+ * @param defaultProfile profile a {@code fixed} policy should return (may be {@code null})
+ * @param candidates     every configured candidate; the policy filters out those at cap or unreachable
+ * @param liveCount      current live worker count per profile (from the session registry)
+ * @param unreachable    profiles already known to have failed in this spawn attempt
+ */
+public record PlacementContext(String defaultProfile,
+                               List<PlacementCandidate> candidates,
+                               Function<String, Integer> liveCount,
+                               Set<String> unreachable) {
+}

bridged/src/main/java/dev/ltms/bridged/placement/PlacementException.java

@@ -0,0 +1,12 @@
+package dev.ltms.bridged.placement;
+
+/**
+ * Thrown when a {@link PlacementPolicy} has no candidate available. Kept as a distinct type so
+ * callers can distinguish "no capacity" from a spawn-time transport failure.
+ */
+public final class PlacementException extends IllegalStateException {
+
+    public PlacementException(String message) {
+        super(message);
+    }
+}

bridged/src/main/java/dev/ltms/bridged/placement/PlacementPolicies.java

@@ -0,0 +1,41 @@
+package dev.ltms.bridged.placement;
+
+/**
+ * Factory for the built-in placement policies.
+ */
+public final class PlacementPolicies {
+
+    private PlacementPolicies() {
+    }
+
+    /**
+     * Resolve a policy name from config. Absent/blank values and {@code "fixed"} return the
+     * backward-compatible fixed policy; unknown names throw.
+     */
+    public static PlacementPolicy fromName(String name) {
+        String n = (name == null) ? "" : name.toLowerCase();
+        if (n.isBlank() || "fixed".equals(n)) {
+            return fixed();
+        }
+        if ("weighted".equals(n)) {
+            return weighted();
+        }
+        if ("round-robin".equals(n)) {
+            return roundRobin();
+        }
+        throw new IllegalArgumentException("unknown placement policy '" + name
+                + "' — must be one of: fixed, round-robin, weighted");
+    }
+
+    public static PlacementPolicy fixed() {
+        return new FixedPlacementPolicy();
+    }
+
+    public static PlacementPolicy weighted() {
+        return new WeightedRoundRobinPolicy();
+    }
+
+    public static PlacementPolicy roundRobin() {
+        return new RoundRobinPlacementPolicy();
+    }
+}

bridged/src/main/java/dev/ltms/bridged/placement/PlacementPolicy.java

@@ -0,0 +1,16 @@
+package dev.ltms.bridged.placement;
+
+/**
+ * How {@code bridged} chooses a worker profile when a spawn names none. Implementations are
+ * deterministic and unit-testable; the caller (the composite launcher) handles failover retries.
+ */
+public interface PlacementPolicy {
+
+    /**
+     * Pick one candidate from the configured set.
+     *
+     * @throws java.lang.IllegalStateException when no candidate is available, with a message naming
+     *                                       whether every profile is at capacity or unreachable
+     */
+    PlacementCandidate select(PlacementContext ctx);
+}

bridged/src/main/java/dev/ltms/bridged/placement/PlacementPolicyUtil.java

@@ -0,0 +1,65 @@
+package dev.ltms.bridged.placement;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Shared filtering and empty-set reporting used by the built-in placement policies.
+ */
+final class PlacementPolicyUtil {
+
+    private PlacementPolicyUtil() {
+    }
+
+    /**
+     * Candidates that are not known-unreachable and have not reached their maxLoad.
+     * A {@code null} maxLoad means unlimited.
+     */
+    static List<PlacementCandidate> available(PlacementContext ctx) {
+        List<PlacementCandidate> out = new ArrayList<>();
+        for (PlacementCandidate c : ctx.candidates()) {
+            if (ctx.unreachable().contains(c.profile())) {
+                continue;
+            }
+            Integer cap = c.maxLoad();
+            if (cap != null) {
+                int live = ctx.liveCount().apply(c.profile());
+                if (live >= cap) {
+                    continue;
+                }
+            }
+            out.add(c);
+        }
+        return out;
+    }
+
+    /**
+     * Build a clear exception describing why every candidate was dropped: all at capacity,
+     * all unreachable, or a mix.
+     */
+    static PlacementException emptyException(PlacementContext ctx) {
+        int atCap = 0;
+        int unreachable = 0;
+        for (PlacementCandidate c : ctx.candidates()) {
+            Integer cap = c.maxLoad();
+            if (ctx.unreachable().contains(c.profile())) {
+                unreachable++;
+            } else if (cap != null && ctx.liveCount().apply(c.profile()) >= cap) {
+                atCap++;
+            }
+        }
+
+        int total = ctx.candidates().size();
+        if (total == 0) {
+            return new PlacementException("no worker profiles configured");
+        }
+        if (atCap == total) {
+            return new PlacementException("all worker profiles are at maxLoad");
+        }
+        if (unreachable == total) {
+            return new PlacementException("all worker profiles are unreachable");
+        }
+        return new PlacementException("no worker profile available: " + atCap + " at maxLoad, "
+                + unreachable + " unreachable, " + (total - atCap - unreachable) + " remaining");
+    }
+}

bridged/src/main/java/dev/ltms/bridged/placement/RoundRobinPlacementPolicy.java

@@ -0,0 +1,23 @@
+package dev.ltms.bridged.placement;
+
+import java.util.List;
+import java.util.concurrent.atomic.AtomicInteger;
+
+/**
+ * Deterministic round-robin over the profiles that still have capacity and are not known to be
+ * unreachable. The index advances only on successful selections so the distribution stays even
+ * across spawns.
+ */
+final class RoundRobinPlacementPolicy implements PlacementPolicy {
+
+    private final AtomicInteger index = new AtomicInteger(0);
+
+    @Override
+    public synchronized PlacementCandidate select(PlacementContext ctx) {
+        List<PlacementCandidate> available = PlacementPolicyUtil.available(ctx);
+        if (available.isEmpty()) {
+            throw PlacementPolicyUtil.emptyException(ctx);
+        }
+        return available.get(index.getAndIncrement() % available.size());
+    }
+}

bridged/src/main/java/dev/ltms/bridged/placement/WeightedRoundRobinPolicy.java

@@ -0,0 +1,50 @@
+package dev.ltms.bridged.placement;
+
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * Smooth weighted round-robin (nginx-style): for each selection, add the candidate's weight to
+ * its current score, pick the highest score, then subtract the total weight of all available
+ * candidates from the winner. Weights are not required to sum to 1.0; only their ratios matter.
+ *
+ * <p>The state is per-policy instance and protected by {@code synchronized} so concurrent spawns
+ * see a consistent, deterministic sequence rather than interleaving updates.
+ */
+final class WeightedRoundRobinPolicy implements PlacementPolicy {
+
+    private final Map<String, Double> current = new ConcurrentHashMap<>();
+
+    @Override
+    public synchronized PlacementCandidate select(PlacementContext ctx) {
+        List<PlacementCandidate> available = PlacementPolicyUtil.available(ctx);
+        if (available.isEmpty()) {
+            throw PlacementPolicyUtil.emptyException(ctx);
+        }
+
+        double total = 0.0;
+        for (PlacementCandidate c : available) {
+            total += c.weight();
+        }
+        if (total <= 0.0) {
+            throw new PlacementException("all available profiles have non-positive weight");
+        }
+
+        PlacementCandidate best = null;
+        double bestScore = Double.NEGATIVE_INFINITY;
+        for (PlacementCandidate c : available) {
+            double score = current.merge(c.profile(), (double) c.weight(), (old, add) -> old + add);
+            if (score > bestScore) {
+                bestScore = score;
+                best = c;
+            }
+        }
+        if (best == null) {
+            throw new PlacementException("no placement candidate could be selected");
+        }
+
+        current.put(best.profile(), current.get(best.profile()) - total);
+        return best;
+    }
+}

bridged/src/main/java/dev/ltms/bridged/rest/BridgedApp.java

@@ -1,18 +1,35 @@
 package dev.ltms.bridged.rest;
 
 import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import dev.ltms.bridged.auth.AuditLog;
+import dev.ltms.bridged.auth.Authz;
+import dev.ltms.bridged.auth.CallerResolver;
+import dev.ltms.bridged.auth.Principal;
 import dev.ltms.bridged.guard.GuardException;
+import dev.ltms.bridged.metrics.Metrics;
 import dev.ltms.bridged.herdr.Agent;
 import dev.ltms.bridged.herdr.HerdrClient;
 import dev.ltms.bridged.herdr.HerdrException;
-import dev.ltms.bridged.worker.WorkerService;
+import dev.ltms.bridged.inject.MemberPresence;
+import dev.ltms.bridged.peer.PeerUnreachableException;
+import dev.ltms.bridged.msg.MessageService;
+import dev.ltms.bridged.session.SessionManager;
+import dev.ltms.bridged.peer.MemberRole;
+import dev.ltms.bridged.session.MemberSession;
+import dev.ltms.bridged.session.WorktreeRequest;
+import dev.ltms.bridged.peer.PeerLauncher;
 import io.javalin.Javalin;
 import io.javalin.http.Context;
+import jakarta.servlet.http.HttpServlet;
+import org.eclipse.jetty.servlet.ServletHolder;
 
 import java.util.ArrayList;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.function.Function;
+import java.util.stream.Collectors;
 
 /**
  * The REST surface — {@code bridged}'s contract and its testability seam. Every
@@ -25,25 +42,141 @@ import java.util.Map;
  */
 public final class BridgedApp {
 
-    private final HerdrClient herdr;
-    private final WorkerService workers;
+    /** Default blocking window for a message; kept under typical HTTP idle timeouts. */
+    private static final long DEFAULT_MESSAGE_TIMEOUT_MS = 25_000;
+    private static final long MAX_MESSAGE_TIMEOUT_MS = 120_000;
+    /** Blocking window for a worker's bridge_ask (CB-205); the worker's MCP client caps its own call. */
+    private static final long DEFAULT_ASK_TIMEOUT_MS = 55_000;
+    private static final long MAX_ASK_TIMEOUT_MS = 115_000;
 
-    public BridgedApp(HerdrClient herdr, WorkerService workers) {
+    /** Context attribute under which the resolved caller is stashed by the auth filter. */
+    private static final String CALLER = "bridged.caller";
+
+    private final HerdrClient herdr;
+    private final PeerLauncher workers;
+    private final SessionManager sessions; // CB-301: authoritative session registry
+    private final MessageService messages;
+    private final MemberPresence presence; // CB-113: which workers are MCP-connected (available)
+    private final HttpServlet mcpServlet; // MCP Streamable-HTTP endpoint, mounted at /mcp (nullable)
+    private final CallerResolver auth;    // CB-501: null → authz not enforced (legacy behaviour)
+    private final Metrics metrics;        // CB-502: null → /metrics not exposed
+    private final ObjectMapper mapper = new ObjectMapper();
+
+    /**
+     * Legacy constructor — no identity resolution and no authorization, exactly as the REST surface
+     * behaved before CB-501. Retained so existing acceptance tests keep exercising handler
+     * behaviour without each needing an auth fixture.
+     */
+    public BridgedApp(HerdrClient herdr, PeerLauncher workers, SessionManager sessions,
+                      MessageService messages, MemberPresence presence,
+                      HttpServlet mcpServlet) {
+        this(herdr, workers, sessions, messages, presence, mcpServlet, null, null);
+    }
+
+    /**
+     * @param auth    resolves each request's {@link Principal}; {@code null} disables authorization
+     *                entirely (legacy). {@code main} always supplies one.
+     * @param metrics registry to instrument and expose at {@code GET /metrics}; {@code null} omits
+     *                the endpoint
+     */
+    public BridgedApp(HerdrClient herdr, PeerLauncher workers, SessionManager sessions,
+                      MessageService messages, MemberPresence presence,
+                      HttpServlet mcpServlet, CallerResolver auth, Metrics metrics) {
         this.herdr = herdr;
         this.workers = workers;
+        this.sessions = sessions;
+        this.messages = messages;
+        this.presence = presence;
+        this.mcpServlet = mcpServlet;
+        this.auth = auth;
+        this.metrics = metrics;
     }
 
     /** Wire routes onto a fresh, unstarted Javalin instance. Caller starts it. */
     public Javalin build() {
-        Javalin app = Javalin.create(cfg -> cfg.showJavalinBanner = false);
+        Javalin app = Javalin.create(cfg -> {
+            cfg.showJavalinBanner = false;
+            if (mcpServlet != null) {
+                // The MCP server shares the daemon's port; Jetty routes /mcp to its servlet.
+                cfg.jetty.modifyServletContextHandler(h ->
+                        h.addServlet(new ServletHolder(mcpServlet), "/mcp"));
+            }
+        });
+        // CB-501: resolve identity once per request, before any handler. /mcp does NOT pass through
+        // here — it is a raw servlet on Jetty's context handler — so BridgeMcp enforces separately
+        // against the same CallerResolver. Any check that lives in only one place is not a control.
+        if (auth != null) {
+            app.before(ctx -> ctx.attribute(CALLER,
+                    auth.resolve(ctx.req().getRemoteAddr(), ctx.req().getRemotePort(),
+                            ctx.header("Authorization"))));
+        }
         app.get("/healthz", this::healthz);
+        if (metrics != null) {
+            app.get("/metrics", this::metrics);
+        }
         app.get("/sessions", this::sessions);
         app.get("/agents", this::agents);
-        app.post("/workers", this::spawnWorker);
-        app.delete("/workers/{paneId}", this::stopWorker);
+        app.get("/members", this::listMembers);                  // CB-304: registry roster + live herdr status
+        app.get("/profiles", this::profiles);                    // configured backend profiles
+        app.post("/members", this::spawnMember);                 // optional ?role=&profile= or {"role":…,"profile":…}
+        app.delete("/members/{paneId}", this::stopMember);
+        app.post("/sessions/{id}/message", this::sendMessage);   // bridge_send (primary; blocking, wait:false, or answer via turnId)
+        app.post("/sessions/{id}/reply", this::replyMessage);    // bridge_reply (worker)
+        app.get("/sessions/{id}/replies", this::drainReplies);   // drain reply inbox (CB-307)
+        app.post("/sessions/{id}/ask", this::askMessage);        // bridge_ask (worker → primary, CB-205)
+        app.get("/sessions/{id}/status", this::sessionStatus);   // bridge_status
+        app.get("/tasks/{ticket}", this::taskStatus);            // poll an async (wait:false) send
         return app;
     }
 
+    /**
+     * Gate a handler on the CB-505 authorization table. Returns {@code true} when the request may
+     * proceed; otherwise writes the error response and returns {@code false}.
+     *
+     * <p>401 vs 403 is a real distinction here: 401 means "you presented no usable identity" (a
+     * credential problem the caller can fix), 403 means "you are authenticated, but this is not
+     * yours" (a worker reaching for another worker's session, or for orchestration).
+     */
+    private boolean allow(Context ctx, Authz.Action action, String target) {
+        if (auth == null) {
+            return true; // legacy: authorization not enforced
+        }
+        Principal caller = ctx.attribute(CALLER);
+        if (Authz.permits(caller, action, target)) {
+            if (action != Authz.Action.READ && action != Authz.Action.METRICS) {
+                AuditLog.allowed(caller, action, target); // reads would drown the trail
+            }
+            return true;
+        }
+        if (Authz.isUnauthenticated(caller)) {
+            AuditLog.denied(caller, action, target, "unauthenticated");
+            countAuthFailure("unauthenticated");
+            ctx.status(401).json(Map.of("error", "unauthenticated",
+                    "detail", "present Authorization: Bearer <token>"));
+        } else {
+            AuditLog.denied(caller, action, target, "forbidden");
+            countAuthFailure("forbidden");
+            ctx.status(403).json(Map.of("error", "forbidden",
+                    "detail", caller.describe() + " may not " + action + " on "
+                            + (target == null ? "this resource" : target)));
+        }
+        return false;
+    }
+
+    private void countAuthFailure(String reason) {
+        if (metrics != null) {
+            metrics.inc("bridged_auth_failures_total", "reason", reason);
+        }
+    }
+
+    /** Prometheus scrape endpoint (CB-502). */
+    private void metrics(Context ctx) {
+        if (!allow(ctx, Authz.Action.METRICS, null)) {
+            return;
+        }
+        ctx.status(200).contentType("text/plain; version=0.0.4; charset=utf-8").result(metrics.render());
+    }
+
     /** Liveness + herdr reachability. 200 when herdr answers ping, 503 otherwise. */
     private void healthz(Context ctx) {
         try {
@@ -63,6 +196,9 @@ public final class BridgedApp {
 
     /** Sessions view derived from herdr {@code workspace.list} (one workspace → one row). */
     private void sessions(Context ctx) {
+        if (!allow(ctx, Authz.Action.READ, null)) {
+            return;
+        }
         JsonNode result = herdr.call("workspace.list");
         List<Map<String, Object>> out = new ArrayList<>();
         for (JsonNode w : result.path("workspaces")) {
@@ -78,25 +214,333 @@ public final class BridgedApp {
 
     /** Discovery: every agent herdr tracks, keyed by its Claude session UUID. */
     private void agents(Context ctx) {
-        ctx.status(200).json(Map.of("agents", workers.list().stream().map(BridgedApp::view).toList()));
+        if (!allow(ctx, Authz.Action.READ, null)) {
+            return;
+        }
+        ctx.status(200).json(Map.of("agents",
+                workers.list().stream().map(Agent.class::cast).map(BridgedApp::view).toList()));
     }
 
-    /** Spawn a guard-checked worker. 403 if the base_url would breach the subscription boundary. */
-    private void spawnWorker(Context ctx) {
+    /** CB-304: bridge-owned roster merged with live herdr status by paneId. */
+    private void listMembers(Context ctx) {
+        if (!allow(ctx, Authz.Action.READ, null)) {
+            return;
+        }
+        // CB-519: the registry key is a host-unique id, not the pane coordinate — join on terminal.
+        Map<String, Agent> live = workers.list().stream()
+                .map(Agent.class::cast)
+                .filter(a -> a.terminalId() != null)
+                .collect(Collectors.toMap(Agent::terminalId, Function.identity(), (_, b) -> b));
+        List<Map<String, Object>> out = sessions.roster().stream()
+                .map(s -> SessionManager.rosterView(s, live.get(s.terminalId())))
+                .toList();
+        ctx.status(200).json(Map.of("workers", out));
+    }
+
+    /** The configured worker profiles and which one a no-argument spawn uses. */
+    private void profiles(Context ctx) {
+        if (!allow(ctx, Authz.Action.READ, null)) {
+            return;
+        }
+        ctx.status(200).json(Map.of(
+                "profiles", workers.profiles(),
+                "default", workers.defaultProfile() == null ? "" : workers.defaultProfile()));
+    }
+
+    /**
+     * Spawn a guard-checked worker. An optional {@code profile} (query param or {@code {"profile":…}}
+     * body) picks which configured profile; omitted → the default. 403 if the base_url would breach
+     * the subscription boundary, 400 for an unknown profile.
+     */
+    private void spawnMember(Context ctx) {
+        if (!allow(ctx, Authz.Action.SPAWN, null)) {
+            return;
+        }
+        String role = ctx.queryParam("role");
+        String profile = ctx.queryParam("profile");
+        String cwd = ctx.queryParam("cwd");
+        String worktree = ctx.queryParam("worktree");
+        String ticket = ctx.queryParam("ticket");
+        if (profile == null || profile.isBlank() || cwd == null || cwd.isBlank()
+                || worktree == null || worktree.isBlank()) {
+            try {
+                String body = ctx.body();
+                if (!body.isBlank()) {
+                    JsonNode b = mapper.readTree(body);
+                    if (role == null || role.isBlank()) role = b.path("role").asText(null);
+                    if (profile == null || profile.isBlank()) profile = b.path("profile").asText(null);
+                    if (cwd == null || cwd.isBlank()) cwd = b.path("cwd").asText(null);
+                    if (worktree == null || worktree.isBlank()) worktree = b.path("worktree").asText(null);
+                    if (ticket == null || ticket.isBlank()) ticket = b.path("ticket").asText(null);
+                }
+            } catch (Exception ignored) {
+                // A malformed/empty body just means "no overrides" → fall through to defaults.
+            }
+        }
+        WorktreeRequest wt = worktreeRequest(worktree, ticket);
+        MemberRole memberRole;
         try {
-            Agent worker = workers.spawn();
-            ctx.status(201).json(view(worker));
+            memberRole = (role == null || role.isBlank()) ? MemberRole.DEV : MemberRole.parse(role);
+        } catch (IllegalArgumentException e) {
+            ctx.status(400).json(Map.of("error", "unknown_role", "detail", e.getMessage()));
+            return;
+        }
+        try {
+            // No MCP caller over REST, so callerCwd and ownerTerminal are null.
+            MemberSession member = sessions.acquire(blankToNull(profile), memberRole,
+                    blankToNull(cwd), null, null, wt);
+            ctx.status(201).json(view(member));
         } catch (GuardException e) {
             ctx.status(403).json(Map.of("error", "subscription_boundary", "detail", e.getMessage()));
+        } catch (IllegalArgumentException e) {
+            ctx.status(400).json(Map.of("error", "unknown_profile", "detail", e.getMessage()));
+        } catch (PeerUnreachableException e) {
+            ctx.status(502).json(Map.of("error", "spawn_timeout", "detail", e.getMessage()));
         }
     }
 
+    private static WorktreeRequest worktreeRequest(String worktree, String ticket) {
+        if (worktree == null || worktree.isBlank() || "false".equalsIgnoreCase(worktree)) {
+            return null;
+        }
+        if ("true".equalsIgnoreCase(worktree)) {
+            if (ticket == null || ticket.isBlank()) {
+                throw new IllegalArgumentException("worktree=true requires a ticket slug");
+            }
+            return new WorktreeRequest(ticket, null);
+        }
+        return new WorktreeRequest(worktree, null);
+    }
+
+    private static String blankToNull(String s) {
+        return (s == null || s.isBlank()) ? null : s;
+    }
+
     /** Tear a worker down by pane id. */
-    private void stopWorker(Context ctx) {
-        workers.stop(ctx.pathParam("paneId"));
+    private void stopMember(Context ctx) {
+        String paneId = ctx.pathParam("paneId");
+        if (!allow(ctx, Authz.Action.STOP, paneId)) {
+            return;
+        }
+        sessions.release(paneId);
         ctx.status(204);
     }
 
+    /**
+     * The blocking delegation call (CB-104): inject {@code content} into the worker via the
+     * status-gated injector and block until the worker returns a structured {@code bridge_reply}.
+     * Times out with a typed 202 (working / queued / busy) rather than an error — the message may
+     * still land.
+     */
+    private void sendMessage(Context ctx) {
+        String id = ctx.pathParam("id");
+        if (!allow(ctx, Authz.Action.SEND, id)) {
+            return;
+        }
+        String content;
+        String turnId;
+        long timeout;
+        boolean wait;
+        try {
+            JsonNode body = mapper.readTree(ctx.body());
+            content = body.path("content").asText("");
+            turnId = body.path("turnId").asText(null);
+            timeout = body.path("timeoutMs").asLong(DEFAULT_MESSAGE_TIMEOUT_MS);
+            wait = body.path("wait").asBoolean(true); // default: block for the reply (CB-104)
+        } catch (Exception e) {
+            ctx.status(400).json(Map.of("error", "bad_request", "detail", "body must be JSON"));
+            return;
+        }
+        if (content.isBlank()) {
+            ctx.status(400).json(Map.of("error", "bad_request", "detail", "content is required"));
+            return;
+        }
+        timeout = Math.clamp(timeout, 1, MAX_MESSAGE_TIMEOUT_MS);
+
+        // Answering a worker's bridge_ask (CB-205): always blocks, and derives the worker from turnId.
+        if (turnId != null && !turnId.isBlank()) {
+            writeReply(ctx, id, messages.answer(turnId, content, timeout), timeout);
+            return;
+        }
+
+        if (!wait) {
+            // Fire-and-poll (CB-107): return a ticket immediately; the caller polls GET /tasks/{ticket}.
+            String ticket = messages.sendAsync(id, content);
+            ctx.status(202).json(Map.of("sessionId", id, "ticket", ticket, "status", "accepted"));
+            return;
+        }
+
+        try {
+            writeReply(ctx, id, messages.send(id, content, timeout), timeout);
+        } catch (HerdrException e) {
+            herdrError(ctx, e);
+        }
+    }
+
+    /**
+     * Render a {@link MessageService.Reply} onto the response — shared by a normal send and a
+     * bridge_ask answer. A structured/scraped completion is 200; a worker's mid-turn question a 202
+     * (with its {@code turnId}); a stale answer a 409; every other non-terminal outcome a typed 202.
+     */
+    private void writeReply(Context ctx, String id, MessageService.Reply reply, long timeout) {
+        switch (reply.outcome()) {
+            case QUESTION -> ctx.status(202).json(Map.of(
+                    "sessionId", id, "status", "question",
+                    "question", reply.text(), "turnId", reply.turnId()));
+            case STALE_TURN -> ctx.status(409).json(Map.of(
+                    "sessionId", id, "error", "stale_turn",
+                    "detail", "that question is no longer open (timed out or already answered)"));
+            case REPLIED, COMPLETED_UNREPLIED -> {
+                // replySource distinguishes a structured bridge_reply from the CB-106 completion
+                // fallback (a scrape of the worker's transcript when it finished without replying).
+                String source = reply.outcome() == MessageService.Outcome.REPLIED ? "reply" : "transcript";
+                ctx.status(200).json(Map.of("sessionId", id, "reply", reply.text(), "replySource", source));
+            }
+            default -> ctx.status(202).json(Map.of(
+                    "sessionId", id,
+                    "status", switch (reply.outcome()) {
+                        case TIMED_OUT_WORKING -> "working";
+                        case TIMED_OUT_QUEUED -> "queued";
+                        case BUSY -> "busy";
+                        case WORKER_FAILED -> "failed";
+                        default -> "done"; // unreachable (terminal outcomes handled above)
+                    },
+                    "detail", reply.outcome() == MessageService.Outcome.WORKER_FAILED && reply.text() != null
+                            ? reply.text()
+                            : "no reply within " + timeout + "ms; poll status or retry"));
+        }
+    }
+
+    /**
+     * A worker's mid-turn question ({@code bridge_ask}, CB-205) — surfaces to the primary's open
+     * blocking send and blocks until it answers. 200 with the answer, 409 if no delegation is open,
+     * 202 if the primary stayed silent.
+     */
+    private void askMessage(Context ctx) {
+        String id = ctx.pathParam("id");
+        if (!allow(ctx, Authz.Action.ASK, id)) {
+            return;
+        }
+        String question;
+        long timeout;
+        try {
+            JsonNode body = mapper.readTree(ctx.body());
+            question = body.path("question").asText("");
+            timeout = body.path("timeoutMs").asLong(DEFAULT_ASK_TIMEOUT_MS);
+        } catch (Exception e) {
+            ctx.status(400).json(Map.of("error", "bad_request", "detail", "body must be JSON"));
+            return;
+        }
+        if (question.isBlank()) {
+            ctx.status(400).json(Map.of("error", "bad_request", "detail", "question is required"));
+            return;
+        }
+        timeout = Math.clamp(timeout, 1, MAX_ASK_TIMEOUT_MS);
+        MessageService.AskResult r = messages.ask(id, question, timeout);
+        switch (r.outcome()) {
+            case ANSWERED -> ctx.status(200).json(Map.of("sessionId", id, "answered", true, "answer", r.answer()));
+            case NO_WAITER -> ctx.status(409).json(Map.of(
+                    "sessionId", id, "error", "no_pending_send",
+                    "detail", "no primary is awaiting this turn to answer a question"));
+            case TIMED_OUT -> ctx.status(202).json(Map.of(
+                    "sessionId", id, "status", "no_answer",
+                    "detail", "the primary did not answer within " + timeout + "ms"));
+        }
+    }
+
+    /**
+     * The worker's structured reply ({@code bridge_reply}) — resolves the blocking send awaiting
+     * on this session, or queues the reply in the inbox when no send is open (CB-307).
+     */
+    private void replyMessage(Context ctx) {
+        String id = ctx.pathParam("id");
+        // The rule that matters: a worker may reply only as itself. Over MCP this was already true
+        // structurally (identity comes from the connection, never an argument); over REST the path
+        // id was simply trusted, so this is where the invariant actually gets enforced.
+        if (!allow(ctx, Authz.Action.REPLY, id)) {
+            return;
+        }
+        String content;
+        try {
+            content = mapper.readTree(ctx.body()).path("content").asText("");
+        } catch (Exception e) {
+            ctx.status(400).json(Map.of("error", "bad_request", "detail", "body must be JSON"));
+            return;
+        }
+        messages.reply(id, content);
+        ctx.status(200).json(Map.of("sessionId", id, "delivered", true));
+    }
+
+    /**
+     * Drain the reply inbox for a worker session — peek + ack any replies that arrived when no send
+     * was open. At-least-once: draining removes them from the inbox so a subsequent read returns
+     * nothing; an in-flight failure between the drain and the caller's processing re-surfaces them.
+     */
+    private void drainReplies(Context ctx) {
+        String id = ctx.pathParam("id");
+        if (!allow(ctx, Authz.Action.DRAIN, id)) {
+            return;
+        }
+        var replies = messages.drainReplies(id);
+        ctx.status(200).json(Map.of("sessionId", id, "replies",
+                replies.stream().map(m -> Map.of(
+                        "msgId", m.msgId(),
+                        "content", m.content())).toList()));
+    }
+
+    /**
+     * Live lifecycle status of a worker (MCP `bridge_status` wraps this in CB-105), plus its
+     * <em>readiness</em> (CB-113): {@code ready} is true once the worker's Claude has connected the
+     * bridge MCP — the reliable "available to receive a task" signal, unlike bare {@code idle}, which
+     * is also true during boot.
+     */
+    private void sessionStatus(Context ctx) {
+        String id = ctx.pathParam("id");
+        if (!allow(ctx, Authz.Action.READ, id)) {
+            return;
+        }
+        try {
+            ctx.status(200).json(Map.of(
+                    "sessionId", id,
+                    "status", messages.status(id).name().toLowerCase(),
+                    "ready", presence.isPresent(id)));
+        } catch (HerdrException e) {
+            herdrError(ctx, e);
+        }
+    }
+
+    /** Poll an async (wait:false) delegation by ticket. 404 for an unknown/expired ticket. */
+    private void taskStatus(Context ctx) {
+        if (!allow(ctx, Authz.Action.READ, null)) {
+            return;
+        }
+        MessageService.TaskView v = messages.poll(ctx.pathParam("ticket"));
+        if (v == null) {
+            ctx.status(404).json(Map.of("error", "unknown_ticket", "detail", "no such task (or it has expired)"));
+            return;
+        }
+        Map<String, Object> body = new LinkedHashMap<>();
+        body.put("ticket", v.ticket());
+        body.put("phase", v.phase().name().toLowerCase());
+        if (v.reply() != null) {
+            body.put("reply", v.reply());
+            body.put("replySource", v.replySource());
+        }
+        if (v.detail() != null) {
+            body.put("detail", v.detail());
+        }
+        ctx.status(200).json(body);
+    }
+
+    /** Map a herdr failure: unknown target → 404, anything else → 502 (herdr is upstream). */
+    private static void herdrError(Context ctx, HerdrException e) {
+        if (e.code() != null && e.code().endsWith("_not_found")) {
+            ctx.status(404).json(Map.of("error", "session_not_found", "detail", e.getMessage()));
+        } else {
+            ctx.status(502).json(Map.of("error", "herdr_error", "detail", e.getMessage()));
+        }
+    }
+
     /** Stable JSON projection of an agent (null-safe for the start-time shape). */
     private static Map<String, Object> view(Agent a) {
         Map<String, Object> m = new LinkedHashMap<>();
@@ -109,4 +553,22 @@ public final class BridgedApp {
         m.put("status", a.status().name().toLowerCase());
         return m;
     }
+
+    /** CB-301 projection of an authoritative bridge-owned session. */
+    private static Map<String, Object> view(MemberSession s) {
+        Map<String, Object> m = new LinkedHashMap<>();
+        m.put("terminalId", s.terminalId());
+        m.put("paneId", s.paneId());
+        m.put("profile", s.profile());
+        m.put("cwd", s.cwd());
+        m.put("ownerTerminal", s.ownerTerminal());
+        m.put("state", s.state().name().toLowerCase());
+        if (s.worktree() != null) {
+            m.put("worktree", s.worktree());
+        }
+        if (s.branch() != null) {
+            m.put("branch", s.branch());
+        }
+        return m;
+    }
 }

bridged/src/main/java/dev/ltms/bridged/session/GitWorktrees.java

@@ -0,0 +1,277 @@
+package dev.ltms.bridged.session;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.UncheckedIOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.security.SecureRandom;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.stream.Collectors;
+
+/**
+ * Production {@link Worktrees} implementation that shells {@code git} via {@link ProcessBuilder}.
+ * Non-zero exits become {@link WorktreeException}. Worktree directories live under a configurable
+ * root (default: a sibling {@code .bridged-worktrees} of the repo root) so they are never nested
+ * inside the primary working tree.
+ */
+public final class GitWorktrees implements Worktrees {
+
+    private static final Logger log = LoggerFactory.getLogger(GitWorktrees.class);
+
+    /** Project-level MCP config. Present in the repo, so every worktree would otherwise inherit the
+     *  primary's IDE server mounts (a CB-523 worker edited the primary checkout; see the isolation
+     *  javadoc). Neutralized unconditionally. */
+    private static final String MCP_CONFIG = ".mcp.json";
+
+    /** What {@link #isolateToolSurface} writes for {@code .mcp.json}: a valid, explicitly empty server map. */
+    private static final String NEUTRAL_MCP_CONFIG = "{\n  \"mcpServers\": {}\n}\n";
+
+    /** OpenCode's repo-level config. Tracked here, so it lands in every worktree, and it mounts the
+     *  primary's gitea and context7 servers with the primary's credentials. Neutralized so the worker
+     *  gets only the config its launcher writes via {@code OPENCODE_CONFIG}.
+     *
+     *  <p>The reason has changed shape and is now stronger. It used to be a crash: the file carried
+     *  {@code {file:.secrets/...}} references to gitignored files that never reached a worktree, and
+     *  opencode refuses to start on a dangling reference (CB-543). Those credentials now live in one
+     *  shell-level store and the file reads them as {@code {env:...}}, so in a worktree the reference
+     *  resolves instead of failing. That is worse, not better: a member would silently inherit the
+     *  primary's admin-scoped {@code GITEA_ACCESS_TOKEN}. A loud crash became a quiet privilege leak,
+     *  so this entry protects a boundary now rather than papering over a startup error. */
+    private static final String OPENCODE_CONFIG = "opencode.json";
+
+    /** What {@link #isolateToolSurface} writes for {@code opencode.json}: a valid, empty JSON object. */
+    private static final String NEUTRAL_OPENCODE_CONFIG = "{}\n";
+
+    /** Autoenv's repo-level config. Not tracked today, but re-landing it must stay safe: autoenv
+     *  authorizes by path, so a fresh worktree path is always unauthorized and its interactive prompt
+     *  would block every spawn — neutralize it so it can never be committed. */
+    private static final String AUTOENV_CONFIG = ".autoenv";
+
+    /** What {@link #isolateToolSurface} writes for {@code .autoenv}: a valid, empty env file. */
+    private static final String NEUTRAL_AUTOENV_CONFIG = "";
+
+    /**
+     * A tracked project config that is hostile in a provisioned worktree, and what to replace it
+     * with. {@link #file} is the repo-relative path; {@link #stub} is a neutral but VALID payload for
+     * that file's format — a malformed stub would only trade one crash for another;
+     * {@link #createIfAbsent} keeps {@code .mcp.json}'s long-standing behaviour of writing its stub
+     * even when the repo carries no such file, whereas the others are only touched when present.
+     */
+    private record WorktreeHostileConfig(String file, String stub, boolean createIfAbsent) {}
+
+    /** The worktree-hostile configs neutralized in every provisioned worktree, in order. */
+    private static final List<WorktreeHostileConfig> WORKTREE_HOSTILE_CONFIGS = List.of(
+            new WorktreeHostileConfig(MCP_CONFIG, NEUTRAL_MCP_CONFIG, true),
+            new WorktreeHostileConfig(OPENCODE_CONFIG, NEUTRAL_OPENCODE_CONFIG, false),
+            new WorktreeHostileConfig(AUTOENV_CONFIG, NEUTRAL_AUTOENV_CONFIG, false)
+    );
+
+    private final String configuredRoot;
+    private final SecureRandom random = new SecureRandom();
+    private final AtomicLong seq = new AtomicLong();
+
+    /** Default constructor: worktree root is derived per-repo as {@code <repoRoot>/../.bridged-worktrees}. */
+    public GitWorktrees() {
+        this(null);
+    }
+
+    /** @param configuredRoot nullable absolute or relative path; null/blank derives a sibling of the repo root. */
+    public GitWorktrees(String configuredRoot) {
+        this.configuredRoot = configuredRoot;
+    }
+
+    @Override
+    public String add(String repoRoot, String branch, String baseRef) {
+        String base = (baseRef == null || baseRef.isBlank()) ? "HEAD" : baseRef;
+        String nonce = nonce();
+        Path root = resolveRoot(repoRoot);
+        Path path = root.resolve(nonce);
+        try {
+            Files.createDirectories(root);
+        } catch (IOException e) {
+            throw new WorktreeException("cannot create worktree root " + root + ": " + e.getMessage(), e);
+        }
+        String wt = path.toAbsolutePath().toString();
+        log.info("adding worktree branch={} path={} base={}", branch, wt, base);
+        exec("git", "-C", repoRoot, "worktree", "add", wt, "-b", branch, base);
+        isolateToolSurface(wt);
+        return wt;
+    }
+
+    /**
+     * Neutralize the worktree's worktree-hostile project configs so a worker inherits only the tools
+     * and environment its launcher mounts (the bridge via {@code --mcp-config}, the opencode config
+     * via {@code OPENCODE_CONFIG}) — never the primary's.
+     *
+     * <p>This is unconditional, and it is not the same job as the parity overlay. The repo's own
+     * committed {@code .mcp.json} declares the primary's IDE servers, so a fresh checkout mounts them
+     * whether or not the overlay copies anything; a worker that inherits them navigates and edits
+     * through tools bound to the <em>primary's</em> IntelliJ project, which silently hands it absolute
+     * paths outside its own worktree. That is not hypothetical: a CB-523 worker made all 59 of its
+     * edits in the primary checkout while compiling its worktree, so every build it ran was of code
+     * that did not contain its changes. {@code opencode.json} is the same trap one tool over — tracked,
+     * so it lands in every worktree, and it mounts gitea and context7 with the primary's own
+     * credentials, which a member must never hold. {@code .autoenv} extends the principle to a
+     * config that is not tracked today: autoenv authorizes by path, so a fresh worktree path is always
+     * unauthorized and its interactive prompt would block every spawn, so re-landing one must be safe.
+     *
+     * <p>Where a config exists it is replaced by a valid neutral stub (an explicitly empty
+     * map/object, or an empty env file — never a deletion, which would still let a later
+     * {@code git checkout} restore the hostile copy). The {@code --skip-worktree} bit keeps the
+     * neutralized copy from ever showing up as a local modification the worker might commit. A config
+     * the repo does not carry is skipped silently — no stub is invented for a file the repo does not
+     * have, and one missing file must never fail provisioning.
+     */
+    private void isolateToolSurface(String worktreePath) {
+        Path root = Path.of(worktreePath).toAbsolutePath().normalize();
+        for (WorktreeHostileConfig cfg : WORKTREE_HOSTILE_CONFIGS) {
+            neutralize(root, worktreePath, cfg);
+        }
+    }
+
+    private void neutralize(Path root, String worktreePath, WorktreeHostileConfig cfg) {
+        Path target = root.resolve(cfg.file());
+        if (!Files.exists(target) && !cfg.createIfAbsent()) {
+            log.debug("{} absent in the worktree — skipping (repo does not carry it)", cfg.file());
+            return;
+        }
+        try {
+            Files.writeString(target, cfg.stub());
+        } catch (IOException e) {
+            throw new WorktreeException("cannot neutralize " + cfg.file() + " in the worktree: "
+                    + e.getMessage(), e);
+        }
+        if (isTracked(root, cfg.file())) {
+            exec("git", "-C", worktreePath, "update-index", "--skip-worktree", cfg.file());
+        }
+        log.debug("neutralized {} — worker tool surface is launcher-mounted only", cfg.file());
+    }
+
+    @Override
+    public void remove(String repoRoot, String worktreePath) {
+        Path p = Path.of(worktreePath);
+        if (!Files.exists(p)) {
+            log.debug("worktree {} already gone — nothing to remove", worktreePath);
+            return;
+        }
+        log.info("removing worktree {}", worktreePath);
+        exec("git", "-C", repoRoot, "worktree", "remove", "--force", worktreePath);
+    }
+
+    @Override
+    public void overlayParity(String repoRoot, String worktreePath, List<String> overlay) {
+        if (overlay == null || overlay.isEmpty()) {
+            return;
+        }
+        Path srcRoot = Path.of(repoRoot).toAbsolutePath().normalize();
+        Path dstRoot = Path.of(worktreePath).toAbsolutePath().normalize();
+        for (String rel : overlay) {
+            Path src = srcRoot.resolve(rel).normalize();
+            if (!Files.exists(src)) {
+                log.debug("parity overlay source missing — skipping {}", rel);
+                continue;
+            }
+            Path dst = dstRoot.resolve(rel).normalize();
+            try {
+                Files.createDirectories(dst.getParent());
+                Files.copy(src, dst, StandardCopyOption.REPLACE_EXISTING, StandardCopyOption.COPY_ATTRIBUTES);
+                log.debug("copied parity overlay {}", rel);
+            } catch (IOException e) {
+                throw new WorktreeException("cannot copy overlay " + rel + ": " + e.getMessage(), e);
+            }
+            if (isTracked(dstRoot, rel)) {
+                exec("git", "-C", worktreePath, "update-index", "--skip-worktree", rel);
+                log.debug("marked overlay --skip-worktree {}", rel);
+            }
+        }
+    }
+
+    @Override
+    public String repoRoot(String cwd) {
+        String out = exec("git", "-C", cwd, "rev-parse", "--show-toplevel");
+        return Path.of(out.trim()).toAbsolutePath().normalize().toString();
+    }
+
+    /** Resolve the directory that will hold per-session worktree checkouts. */
+    private Path resolveRoot(String repoRoot) {
+        if (configuredRoot != null && !configuredRoot.isBlank()) {
+            return Path.of(configuredRoot).toAbsolutePath().normalize();
+        }
+        Path repo = Path.of(repoRoot).toAbsolutePath().normalize();
+        return repo.resolveSibling(".bridged-worktrees");
+    }
+
+    private String nonce() {
+        return String.format("%06x", random.nextInt(1 << 24)) + "-" + seq.incrementAndGet();
+    }
+
+    private boolean isTracked(Path worktreeRoot, String rel) {
+        return exitCode("git", "-C", worktreeRoot.toString(), "ls-files", "--error-unmatch", rel) == 0;
+    }
+
+    /**
+     * Run a command and return its stdout. Non-zero exit → {@link WorktreeException} with both
+     * stdout and stderr (merged by redirectErrorStream).
+     */
+    private String exec(String... command) {
+        String out;
+        int code;
+        Process p;
+        try {
+            p = new ProcessBuilder(command).redirectErrorStream(true).start();
+        } catch (IOException e) {
+            throw new WorktreeException("failed to start " + command[0] + ": " + e.getMessage(), e);
+        }
+        try (BufferedReader r = new BufferedReader(new InputStreamReader(p.getInputStream(), StandardCharsets.UTF_8))) {
+            out = r.lines().collect(Collectors.joining("\n"));
+        } catch (IOException e) {
+            p.destroyForcibly();
+            throw new UncheckedIOException(e);
+        }
+        try {
+            if (!p.waitFor(30, TimeUnit.SECONDS)) {
+                p.destroyForcibly();
+                throw new WorktreeException("command timed out: " + String.join(" ", command) + "\n" + out);
+            }
+            code = p.exitValue();
+        } catch (InterruptedException e) {
+            p.destroyForcibly();
+            Thread.currentThread().interrupt();
+            throw new WorktreeException("interrupted waiting for command: " + String.join(" ", command), e);
+        }
+        if (code != 0) {
+            throw new WorktreeException("exit " + code + " for: " + String.join(" ", command)
+                    + (out.isBlank() ? "" : "\n" + out));
+        }
+        return out;
+    }
+
+    private int exitCode(String... command) {
+        Process p;
+        try {
+            p = new ProcessBuilder(command).redirectErrorStream(true).start();
+        } catch (IOException e) {
+            throw new WorktreeException("failed to start " + command[0] + ": " + e.getMessage(), e);
+        }
+        try {
+            if (!p.waitFor(30, TimeUnit.SECONDS)) {
+                p.destroyForcibly();
+                throw new WorktreeException("command timed out: " + String.join(" ", command));
+            }
+            return p.exitValue();
+        } catch (InterruptedException e) {
+            p.destroyForcibly();
+            Thread.currentThread().interrupt();
+            throw new WorktreeException("interrupted waiting for command: " + String.join(" ", command), e);
+        }
+    }
+}

bridged/src/main/java/dev/ltms/bridged/session/MemberSession.java

@@ -0,0 +1,68 @@
+package dev.ltms.bridged.session;
+
+import dev.ltms.bridged.peer.MemberRole;
+
+/**
+ * A bridge-owned worker session — the authoritative in-daemon record of a worker this
+ * process spawned. Immutable; state transitions are performed by replacing the record in
+ * {@link SessionManager}'s registry.
+ *
+ * @param paneId         the host-unique opaque id (CB-519) — the registry key and the argument to
+ *                       teardown. Despite the historical name this is the {@link
+ *                       dev.ltms.bridged.peer.PeerHandle#id()}, a UUID, and is distinct from the
+ *                       launcher-private herdr pane coordinate.
+ * @param terminalId     herdr terminal handle — the {@code target} for send/read/status
+ * @param profile        the profile name that spawned this session — WHICH BACKEND
+ * @param role           the contract this member runs under — WHAT IT IS FOR. Independent of
+ *                       {@code profile}: a reviewer may run on the same profile as the dev
+ *                       whose diff it reads. {@code null} only for a session recorded before
+ *                       the role was known
+ * @param cwd            the resolved working directory the worker started in
+ * @param ownerTerminal  the caller that requested this worker ({@code null} = daemon/anon)
+ * @param spawnedAtNanos     {@link System#nanoTime()} when the session was registered
+ * @param lastActivityAtNanos {@link System#nanoTime()} of the most recent lifecycle event
+ * @param turnCount          number of delegated turns that have been delivered to this session
+ * @param state              current lifecycle state in the one-shot FSM
+ */
+public record MemberSession(
+        String paneId,
+        String terminalId,
+        String profile,
+        MemberRole role,
+        String cwd,
+        String ownerTerminal,
+        long spawnedAtNanos,
+        long lastActivityAtNanos,
+        int turnCount,
+        State state,
+        String worktree,
+        String branch) {
+
+    /** One-shot worker lifecycle states. */
+    public enum State {
+        SPAWNING,
+        READY,
+        BUSY,
+        DONE,
+        FAILED,
+        RELEASED
+    }
+
+    /** Return a copy of this session in {@code state}. */
+    public MemberSession withState(State state) {
+        return new MemberSession(paneId, terminalId, profile, role, cwd, ownerTerminal, spawnedAtNanos,
+                lastActivityAtNanos, turnCount, state, worktree, branch);
+    }
+
+    /** Return a copy with {@code lastActivityAtNanos} updated to {@code nowNanos}. */
+    public MemberSession withActivity(long nowNanos) {
+        return new MemberSession(paneId, terminalId, profile, role, cwd, ownerTerminal, spawnedAtNanos,
+                nowNanos, turnCount, state, worktree, branch);
+    }
+
+    /** Return a copy with the turn count incremented and activity timestamped at {@code nowNanos}. */
+    public MemberSession bumpTurn(long nowNanos) {
+        return new MemberSession(paneId, terminalId, profile, role, cwd, ownerTerminal, spawnedAtNanos,
+                nowNanos, turnCount + 1, state, worktree, branch);
+    }
+}

bridged/src/main/java/dev/ltms/bridged/session/SessionManager.java

@@ -0,0 +1,629 @@
+package dev.ltms.bridged.session;
+
+import dev.ltms.bridged.auth.MemberLifecycle;
+import dev.ltms.bridged.herdr.Agent;
+import dev.ltms.bridged.inject.TurnListener;
+import dev.ltms.bridged.inject.MemberPresence;
+import dev.ltms.bridged.peer.MemberRole;
+import dev.ltms.bridged.peer.PeerHandle;
+import dev.ltms.bridged.peer.PeerLauncher;
+import dev.ltms.bridged.peer.SpawnRequest;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.security.SecureRandom;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.function.Consumer;
+import java.util.function.LongSupplier;
+
+/**
+ * Authoritative in-daemon registry of the worker sessions this {@code bridged} process spawned.
+ * Delegates spawn/teardown to a {@link PeerLauncher} (which performs subscription-guarded env
+ * setup and process/materialization) and adds lifecycle tracking, ownership, and deterministic
+ * teardown on top.
+ *
+ * <p>The state machine is intentionally one-shot / no-reuse: every acquired worker is fresh,
+ * and a finished or released worker is torn down, never pooled or reused.
+ *
+ * <p>The manager implements {@link TurnListener} so the injector's turn boundaries drive
+ * {@code READY → BUSY → DONE} (or {@code FAILED}). It exposes a {@link MemberPresence} view via
+ * {@link #asPresence()}: any MCP contact from a worker marks it present and simultaneously
+ * transitions the session {@code SPAWNING → READY}.
+ */
+public final class SessionManager implements TurnListener {
+
+    private static final Logger log = LoggerFactory.getLogger(SessionManager.class);
+
+    private final PeerLauncher launcher;
+    private final Worktrees worktrees;
+    private final ConcurrentHashMap<String /*paneId*/, MemberSession> registry = new ConcurrentHashMap<>();
+    private final MemberPresence presence;
+    private final SecureRandom nonceRandom = new SecureRandom();
+    private final AtomicLong nonceSeq = new AtomicLong();
+    private final LongSupplier nowNanos;
+    private final int contextCap;
+    private final boolean clearAfterTurn;
+    private volatile MemberLifecycle memberLifecycle = MemberLifecycle.NONE;
+
+    /** CB-520: notified with a terminalId on every acquire; no-op until wired. */
+    private final List<Consumer<String>> acquireListeners = new java.util.concurrent.CopyOnWriteArrayList<>();
+    /** CB-516: notified with a terminalId on every release; no-op until wired. */
+    private final List<Consumer<String>> releaseListeners = new java.util.concurrent.CopyOnWriteArrayList<>();
+
+    /** Backward-compatible constructor: shared-tree sessions, production git seam. */
+    public SessionManager(PeerLauncher launcher) {
+        this(launcher, new GitWorktrees(), System::nanoTime, 0, false);
+    }
+
+    /** Backward-compatible constructor with an injectable worktree seam. */
+    public SessionManager(PeerLauncher launcher, Worktrees worktrees) {
+        this(launcher, worktrees, System::nanoTime, 0, false);
+    }
+
+    /** Test constructor with an injectable clock. */
+    public SessionManager(PeerLauncher launcher, Worktrees worktrees, LongSupplier nowNanos) {
+        this(launcher, worktrees, nowNanos, 0, false);
+    }
+
+    /** Production constructor with a configured context turn cap. */
+    public SessionManager(PeerLauncher launcher, Worktrees worktrees, int contextCap) {
+        this(launcher, worktrees, System::nanoTime, contextCap, false);
+    }
+
+    public SessionManager(PeerLauncher launcher, Worktrees worktrees, LongSupplier nowNanos,
+                           int contextCap) {
+        this(launcher, worktrees, nowNanos, contextCap, false);
+    }
+
+    public SessionManager(PeerLauncher launcher, Worktrees worktrees, LongSupplier nowNanos,
+                          int contextCap, boolean clearAfterTurn) {
+        this.launcher = launcher;
+        this.worktrees = worktrees;
+        this.presence = new PresenceBridge(this);
+        this.nowNanos = nowNanos;
+        this.contextCap = contextCap;
+        this.clearAfterTurn = clearAfterTurn;
+    }
+
+    /**
+     * The single {@link MemberPresence} view of this manager: it records availability and forwards
+     * the signal to the {@code SPAWNING → READY} transition. Pass this to the {@code Injector} and
+     * {@code BridgeMcp} where they previously accepted a plain {@link MemberPresence}. The same
+     * instance is returned every call — presence is shared state, so a fresh bridge per call would
+     * fragment the {@code present} set and lose signals across callers.
+     */
+    public MemberPresence asPresence() {
+        return presence;
+    }
+
+    /**
+     * Spawn a worker and register it as {@link MemberSession.State#SPAWNING}. The caller's
+     * identity is recorded as {@code ownerTerminal} ({@code null} for daemon/anon callers).
+     */
+    public MemberSession acquire(String profile, String requestedCwd, String callerCwd,
+                                 String ownerTerminal) {
+        return acquire(profile, requestedCwd, callerCwd, ownerTerminal, null);
+    }
+
+    /**
+     * Spawn a member, optionally inside a fresh git worktree, defaulting the role to
+     * {@link MemberRole#DEV}.
+     *
+     * <p>{@code DEV} is the right default because it is exactly what the old "worker" meant: an
+     * unqualified spawn is a unit of implementation work. An architect or a reviewer is always
+     * asked for on purpose, so neither is ever what a caller silently gets.
+     */
+    public MemberSession acquire(String profile, String requestedCwd, String callerCwd,
+                                 String ownerTerminal, WorktreeRequest wt) {
+        return acquire(profile, MemberRole.DEV, requestedCwd, callerCwd, ownerTerminal, wt);
+    }
+
+    /**
+     * Spawn a member, optionally inside a fresh git worktree. When {@code wt} is non-null the
+     * worktree is provisioned, parity-overlaid, and its path becomes the member's cwd. On any
+     * failure before registration the worktree is removed so no dangling checkout is left.
+     *
+     * @param profile which backend to run on — a {@code profiles:} key
+     * @param role    which contract the member runs under; never {@code null}
+     */
+    public MemberSession acquire(String profile, MemberRole role, String requestedCwd, String callerCwd,
+                                 String ownerTerminal, WorktreeRequest wt) {
+        MemberRole memberRole = (role == null) ? MemberRole.DEV : role;
+        if (wt == null) {
+            // CB-557: the role must ride on the SpawnRequest, not stay a local. The launcher needs it
+            // to pick the profile out of that role's pool and to label the tab; a role kept only on
+            // the MemberSession is recorded after the spawn it was supposed to steer.
+            SpawnRequest req = new SpawnRequest(profile, requestedCwd, callerCwd, null, null, memberRole);
+            PeerHandle handle;
+            try {
+                handle = launcher.spawn(req);
+            } catch (RuntimeException e) {
+                log.warn("spawn failed for profile={} role={}: {}", profile, memberRole, e.getMessage());
+                throw e;
+            }
+            String resolvedProfile = resolveProfile(handle, profile);
+            String cwd = launcher.effectiveCwd(new SpawnRequest(resolvedProfile, requestedCwd, callerCwd));
+            long now = nowNanos.getAsLong();
+            MemberSession session = new MemberSession(
+                    handle.id(),
+                    handle.terminalId(),
+                    resolvedProfile,
+                    memberRole,
+                    cwd,
+                    ownerTerminal,
+                    now,
+                    now,
+                    0,
+                    MemberSession.State.SPAWNING,
+                    null,
+                    null);
+            registry.put(handle.id(), session);
+            memberLifecycle.acquired(session.role(), session.profile(), session.terminalId());
+            log.debug("acquired session id={} terminal={} profile={} owner={}",
+                    handle.id(), handle.terminalId(), session.profile(), session.ownerTerminal());
+            notifyAcquired(session.terminalId());
+            return session;
+        }
+        return acquireWithWorktree(profile, memberRole, requestedCwd, callerCwd, ownerTerminal, wt);
+    }
+
+    /** Tear a worker down by pane id and remove it from the registry. Idempotent. */
+    public void release(String paneId) {
+        release(paneId, ReleaseCause.COMPLETED);
+    }
+
+    /**
+     * Core teardown: always stops the worker pane and deregisters the session; whether the worker's
+     * git worktree is also removed depends on {@code cause}.
+     *
+     * <p>CB-544: these are two concerns that used to be fused. Stopping the pane is correct on every
+     * teardown — the worker process must end. Removing the worktree is a destructive act that is only
+     * correct for a deliberately-finished teardown (an explicit stop of a completed session, the
+     * reaper releasing a genuinely idle one, or a context-capped session). A shutdown drain
+     * must stop panes but preserve worktrees: a worker's uncommitted work exists in exactly one
+     * place — its worktree — so deleting it while the daemon simply goes down is silent data loss,
+     * with no copy and no error. Do NOT fuse these back together; the cost of an orphaned worktree
+     * is a logged path an operator can reclaim, the cost of a deleted one is unrecoverable work.
+     */
+    private void release(String paneId, ReleaseCause cause) {
+        MemberSession removed = registry.remove(paneId);
+        boolean preserveWorktree = cause == ReleaseCause.SHUTDOWN;
+        if (removed != null) {
+            memberLifecycle.released(removed.terminalId());
+            log.debug("releasing session pane={} terminal={} state={} cause={}",
+                    removed.paneId(), removed.terminalId(), removed.state(), cause);
+            if (preserveWorktree && removed.worktree() != null) {
+                logPreservedForShutdown(removed);
+            }
+            // CB-516: a send still waiting on this worker can never be answered now. Tell the
+            // listener BEFORE the pane is torn down, so a blocked caller fails fast with a real
+            // reason instead of sitting on a rendezvous nothing will ever resolve.
+            notifyReleased(removed.terminalId());
+        }
+        launcher.stop(paneId);
+        if (removed != null && !preserveWorktree && removed.worktree() != null) {
+            worktrees.remove(worktrees.repoRoot(removed.cwd()), removed.worktree());
+        }
+    }
+
+    /**
+     * Why a session is being released — governs whether its worktree is preserved or removed.
+     * Worktree removal is reserved for the one case that is genuinely finished; everything else
+     * must keep the worker's only copy of its work.
+     */
+    public enum ReleaseCause {
+        /** Deliberate teardown of a finished session. Stops the pane and removes the worktree. */
+        COMPLETED,
+        /** Daemon shutdown drain. Stops the pane but PRESERVES the worktree. */
+        SHUTDOWN
+    }
+
+    /**
+     * CB-544 shutdown drain log for a worktree we deliberately kept. A session still {@code BUSY}
+     * when the drain timeout expired was abandoned mid-turn — that work may be uncommitted and is
+     * the only copy — so the message is loud and points at the path an operator needs to reclaim.
+     */
+    private void logPreservedForShutdown(MemberSession session) {
+        if (session.state() == MemberSession.State.BUSY) {
+            log.warn("shutdown drain abandoned BUSY session pane={} terminal={} mid-turn; "
+                    + "worktree preserved at {}", session.paneId(), session.terminalId(),
+                    session.worktree());
+        } else {
+            log.info("shutdown drain preserved worktree at {} for pane={}",
+                    session.worktree(), session.paneId());
+        }
+    }
+
+    /**
+     * Register a callback invoked with a session's {@code terminalId} whenever it is acquired
+     * (CB-520). This is the hook that lets the reply inbox {@code own} a target's queue.
+     */
+    public void onAcquire(Consumer<String> listener) {
+        if (listener != null) {
+            acquireListeners.add(listener);
+        }
+    }
+
+    /**
+     * Register a callback invoked with a session's {@code terminalId} whenever it is released
+     * (CB-516). Every teardown path funnels through {@link #release}, so one hook covers the REST
+     * and MCP stop tools, the idle-TTL reaper, and shutdown drain alike.
+     *
+     * <p>Added rather than injected because {@code MessageService} — one intended listener — is
+     * constructed after this manager (it needs the injector and rendezvous, which need the session
+     * presence view this manager exposes). Wiring it at construction would require breaking that
+     * cycle for one callback.
+     */
+    public void onRelease(Consumer<String> listener) {
+        if (listener != null) {
+            releaseListeners.add(listener);
+        }
+    }
+
+    /** Inject the optional member-slot lifecycle after construction without changing constructors. */
+    public void setMemberLifecycle(MemberLifecycle memberLifecycle) {
+        this.memberLifecycle = memberLifecycle == null ? MemberLifecycle.NONE : memberLifecycle;
+    }
+
+    /** A listener failure must never prevent the acquisition it is reacting to. */
+    private void notifyAcquired(String terminalId) {
+        if (terminalId == null) {
+            return;
+        }
+        for (Consumer<String> listener : acquireListeners) {
+            try {
+                listener.accept(terminalId);
+            } catch (RuntimeException e) {
+                log.warn("acquire listener failed for terminal {}: {}", terminalId, e.toString());
+            }
+        }
+    }
+
+    /** A listener failure must never prevent the teardown it is reacting to. */
+    private void notifyReleased(String terminalId) {
+        if (terminalId == null) {
+            return;
+        }
+        for (Consumer<String> listener : releaseListeners) {
+            try {
+                listener.accept(terminalId);
+            } catch (RuntimeException e) {
+                log.warn("release listener failed for terminal {}: {}", terminalId, e.toString());
+            }
+        }
+    }
+
+    private MemberSession acquireWithWorktree(String profile, MemberRole memberRole, String requestedCwd, String callerCwd,
+                                              String ownerTerminal, WorktreeRequest wt) {
+        String preResolvedProfile = (profile == null || profile.isBlank())
+                ? launcher.defaultProfile() : profile;
+        // CB-507: resolve through the launcher's CB-112 chain (requested → profile cwd → caller →
+        // daemon cwd → "."), never the raw args. A plain REST spawn supplies neither a requested
+        // nor a caller cwd, so taking the first non-blank of those two yielded null and put
+        // `git -C null` on the command line — an NPE out of ProcessBuilder, surfacing as HTTP 500.
+        // The non-worktree path always used this chain; only this branch was missed.
+        String repoRoot = worktrees.repoRoot(
+                launcher.effectiveCwd(new SpawnRequest(preResolvedProfile, requestedCwd, callerCwd)));
+        String branch = "worker/" + slug(wt.ticketSlug()) + "-" + nonce();
+        String path = null;
+        PeerHandle handle;
+        try {
+            path = worktrees.add(repoRoot, branch, wt.baseRef());
+            worktrees.overlayParity(repoRoot, path, launcher.parityOverlay(preResolvedProfile));
+            handle = launcher.spawn(new SpawnRequest(profile, path, callerCwd, null, null, memberRole));
+        } catch (RuntimeException e) {
+            log.warn("spawn failed for profile={} role={} branch={} path={}: {}",
+                    preResolvedProfile, memberRole, branch, path, e.getMessage());
+            if (path != null) {
+                try {
+                    worktrees.remove(repoRoot, path);
+                } catch (RuntimeException cleanup) {
+                    log.warn("failed to clean up worktree {} after spawn error: {}", path, cleanup.getMessage());
+                }
+            }
+            throw e;
+        }
+        String resolvedProfile = resolveProfile(handle, profile);
+        String cwd = launcher.effectiveCwd(new SpawnRequest(resolvedProfile, path, callerCwd));
+        long now = nowNanos.getAsLong();
+        MemberSession session = new MemberSession(
+                handle.id(),
+                handle.terminalId(),
+                resolvedProfile,
+                memberRole,
+                cwd,
+                ownerTerminal,
+                now,
+                now,
+                0,
+                MemberSession.State.SPAWNING,
+                path,
+                branch);
+        registry.put(handle.id(), session);
+        memberLifecycle.acquired(session.role(), session.profile(), session.terminalId());
+        log.debug("acquired worktree session id={} terminal={} profile={} branch={} path={}",
+                handle.id(), handle.terminalId(), session.profile(), session.branch(), session.worktree());
+        notifyAcquired(session.terminalId());
+        return session;
+    }
+
+    private String slug(String raw) {
+        return raw == null ? "ticket" : raw.toLowerCase().replaceAll("[^a-z0-9]+", "-").replaceAll("^-+|-+$", "");
+    }
+
+    private String nonce() {
+        return String.format("%06x", nonceRandom.nextInt(1 << 24)) + "-" + nonceSeq.incrementAndGet();
+    }
+
+    /**
+     * The profile to record for a session. A launcher that performed dynamic selection tells us
+     * the actual profile via {@link PeerHandle#profile()}; otherwise fall back to what the caller
+     * requested (or the launcher's default for a no-profile spawn).
+     */
+    private String resolveProfile(PeerHandle handle, String requestedProfile) {
+        String fromHandle = handle.profile();
+        if (fromHandle != null && !fromHandle.isBlank()) {
+            return fromHandle;
+        }
+        if (requestedProfile != null && !requestedProfile.isBlank()) {
+            return requestedProfile;
+        }
+        return launcher.defaultProfile();
+    }
+
+    /** The session for {@code paneId}, if it is still registered and not released. */
+    public Optional<MemberSession> get(String paneId) {
+        return Optional.ofNullable(registry.get(paneId));
+    }
+
+    /** Bridge-owned roster: all registered sessions (acquired minus released). */
+    public List<MemberSession> roster() {
+        return List.copyOf(registry.values());
+    }
+
+    /**
+     * CB-304 merged roster+live view. The registry is authoritative for worktree, branch,
+     * profile, owner, and state; the optional live agent supplies the herdr-reported status.
+     */
+    public static Map<String, Object> rosterView(MemberSession session, Agent live) {
+        Map<String, Object> m = new LinkedHashMap<>();
+        m.put("sessionId", session.terminalId());
+        m.put("paneId", session.paneId());
+        // Both axes, always: profile says which backend this member runs on, role says what it is
+        // for. A lead reading the roster needs both — two rows may share a profile and still be
+        // allowed to do entirely different things.
+        m.put("profile", session.profile());
+        m.put("role", session.role() == null ? "dev" : session.role().wireName());
+        m.put("state", session.state().name().toLowerCase());
+        if (session.worktree() != null) {
+            m.put("worktree", session.worktree());
+        }
+        if (session.branch() != null) {
+            m.put("branch", session.branch());
+        }
+        if (session.ownerTerminal() != null) {
+            m.put("owner", session.ownerTerminal());
+        }
+        m.put("liveStatus", live == null ? "unknown" : live.status().name().toLowerCase());
+        return m;
+    }
+
+    /** Lifecycle hook: worker became available on the bridge MCP. */
+    void onReady(String terminalId) {
+        transitionByTerminal(terminalId, MemberSession.State.SPAWNING, MemberSession.State.READY);
+    }
+
+    /**
+     * Lifecycle hook: a message was delivered into the worker — it is now busy on a turn.
+     * The turn count is bumped and the activity timestamp is refreshed. A {@code DONE} session
+     * can be re-delivered for multi-turn reuse until it is released.
+     */
+    @Override
+    public void onDelivered(String target) {
+        MemberSession current = findByTerminal(target);
+        if (current == null) return;
+        if (current.state() != MemberSession.State.READY && current.state() != MemberSession.State.DONE) {
+            return;
+        }
+        long now = nowNanos.getAsLong();
+        MemberSession updated = current.withState(MemberSession.State.BUSY).bumpTurn(now);
+        if (replace(current, updated)) {
+            log.debug("session transitioned terminal={} pane={} {} -> BUSY turn={}",
+                    target, current.paneId(), current.state(), updated.turnCount());
+        }
+    }
+
+    /** Lifecycle hook: the worker's delegated turn completed successfully. */
+    @Override
+    public void onTurnComplete(String target) {
+        completeTurn(target, false);
+    }
+
+    @Override
+    public boolean hasPostTurnAction(String target) {
+        if (!clearAfterTurn) return false;
+        MemberSession current = findByTerminal(target);
+        return current != null && current.state() == MemberSession.State.BUSY
+                && (contextCap <= 0 || current.turnCount() < contextCap);
+    }
+
+    @Override
+    public boolean onTurnCompleteWithPostAction(String target) {
+        return completeTurn(target, true);
+    }
+
+    private boolean completeTurn(String target, boolean startContextReset) {
+        MemberSession current = findByTerminal(target);
+        if (current == null || current.state() != MemberSession.State.BUSY) return false;
+        long now = nowNanos.getAsLong();
+        MemberSession updated = current.withState(MemberSession.State.DONE).withActivity(now);
+        if (replace(current, updated)) {
+            log.debug("session transitioned terminal={} pane={} BUSY -> DONE turn={}",
+                    target, current.paneId(), updated.turnCount());
+        }
+        if (contextCap > 0 && updated.turnCount() >= contextCap) {
+            release(current.paneId());
+            return false;
+        }
+        if (!startContextReset || !clearAfterTurn) return false;
+        try {
+            return launcher.clearContext(current.paneId());
+        } catch (RuntimeException e) {
+            log.warn("context reset failed for terminal={} pane={}; continuing without reset: {}",
+                    target, current.paneId(), e.getMessage());
+            return false;
+        }
+    }
+
+    /** Lifecycle hook: the worker's delegated turn failed. */
+    @Override
+    public void onTurnFailed(String target) {
+        onFailed(target);
+    }
+
+    /** Lifecycle hook: the worker vanished or was dropped mid-life. */
+    void onFailed(String target) {
+        MemberSession current = findByTerminal(target);
+        if (current == null) return;
+        if (current.state() == MemberSession.State.RELEASED) return;
+        MemberSession.State priorState = current.state();
+        if (replace(current, current.withState(MemberSession.State.FAILED))) {
+            log.warn("member terminal={} pane={} can no longer be delegated to: its turn never resolved "
+                    + "(was {} when it failed)", target, current.paneId(), priorState);
+        }
+    }
+
+    /**
+     * Best-effort reap of sessions that have been idle longer than {@code idleTtlNanos}. Only
+     * {@code READY} and {@code DONE} sessions are eligible — never a {@code SPAWNING} or
+     * {@code BUSY} worker. Returns the number of sessions released.
+     */
+    int reapIdle(long idleTtlNanos) {
+        long now = nowNanos.getAsLong();
+        int reaped = 0;
+        for (MemberSession s : roster()) {
+            if (s.state() != MemberSession.State.READY && s.state() != MemberSession.State.DONE) {
+                continue;
+            }
+            long idleNanos = now - s.lastActivityAtNanos();
+            if (idleNanos > idleTtlNanos) {
+                log.debug("reaping idle session terminal={} pane={}: idle {}s exceeds the {}s ttl",
+                        s.terminalId(), s.paneId(), TimeUnit.NANOSECONDS.toSeconds(idleNanos),
+                        TimeUnit.NANOSECONDS.toSeconds(idleTtlNanos));
+                release(s.paneId());
+                reaped++;
+            }
+        }
+        return reaped;
+    }
+
+    /**
+     * Gracefully drain all registered sessions on daemon shutdown. For each session that is
+     * {@code BUSY}, poll up to {@code timeoutNanos} for it to leave {@code BUSY}, then release it
+     * regardless. Non-busy sessions are released immediately. A failure releasing one session is
+     * logged and does not abort the rest.
+     *
+     * <p>CB-544: this is a {@link ReleaseCause#SHUTDOWN} release — the worker's pane is stopped
+     * (the process must end) but its worktree is preserved and its path logged. Shutdown is never
+     * a reason to delete a worker's only copy of its uncommitted work. A session still {@code BUSY}
+     * when the timeout expired is abandoned mid-turn and logged loudly so an operator can find its
+     * kept worktree.
+     */
+    void drainAll(long timeoutNanos) {
+        long deadline = System.nanoTime() + timeoutNanos;
+        for (MemberSession s : roster()) {
+            try {
+                if (s.state() == MemberSession.State.BUSY) {
+                    while (System.nanoTime() < deadline) {
+                        MemberSession current = registry.get(s.paneId());
+                        if (current == null || current.state() != MemberSession.State.BUSY) {
+                            break;
+                        }
+                        try {
+                            long remaining = deadline - System.nanoTime();
+                            Thread.sleep(Math.min(TimeUnit.NANOSECONDS.toMillis(remaining), 50));
+                        } catch (InterruptedException e) {
+                            Thread.currentThread().interrupt();
+                            break;
+                        }
+                    }
+                }
+                release(s.paneId(), ReleaseCause.SHUTDOWN);
+            } catch (RuntimeException e) {
+                log.warn("drain failed for pane={}; continuing with remaining sessions", s.paneId(), e);
+            }
+        }
+    }
+
+    /**
+     * Close this manager by draining all sessions. The timeout comes from configuration when set,
+     * otherwise a sensible default.
+     */
+    public void close(Integer drainTimeoutSeconds) {
+        int seconds = (drainTimeoutSeconds != null && drainTimeoutSeconds > 0) ? drainTimeoutSeconds : 5;
+        drainAll(TimeUnit.SECONDS.toNanos(seconds));
+    }
+
+    /** Number of sessions currently registered. */
+    public int size() {
+        return registry.size();
+    }
+
+    /**
+     * The registered session owning {@code terminalId}, or {@code null} if none does.
+     *
+     * <p>A null {@code terminalId} is a normal input, not a caller bug: every lifecycle hook here is
+     * fed from the MCP transport, where the <em>primary</em> resolves to a {@link
+     * dev.ltms.bridged.auth.Principal} with no terminal. {@code BridgeMcp} documents that contact as
+     * a no-op, and {@link dev.ltms.bridged.inject.MemberPresence#markPresent} honours it — but
+     * {@code PresenceBridge} then forwards the same null here. Matching on a null id can never
+     * succeed anyway (a registered session always has a terminal), so answer "no match" rather than
+     * throwing: an NPE on this path takes down an unrelated tool call for the primary.
+     */
+    private MemberSession findByTerminal(String terminalId) {
+        if (terminalId == null) return null;
+        for (MemberSession s : registry.values()) {
+            if (terminalId.equals(s.terminalId())) return s;
+        }
+        return null;
+    }
+
+    private void transitionByTerminal(String terminalId, MemberSession.State from,
+                                      MemberSession.State to) {
+        MemberSession current = findByTerminal(terminalId);
+        if (current == null || current.state() != from) return;
+        long now = nowNanos.getAsLong();
+        if (replace(current, current.withState(to).withActivity(now))) {
+            log.debug("session transitioned terminal={} pane={} {} -> {}",
+                    terminalId, current.paneId(), from, to);
+        }
+    }
+
+    private boolean replace(MemberSession expected, MemberSession updated) {
+        return registry.replace(expected.paneId(), expected, updated);
+    }
+
+    /** MemberPresence bridge that also drives the manager's READY transition. */
+    private static final class PresenceBridge extends MemberPresence {
+        private final SessionManager sessions;
+
+        PresenceBridge(SessionManager sessions) {
+            this.sessions = sessions;
+        }
+
+        @Override
+        public void markPresent(String terminal) {
+            if (terminal == null || terminal.isBlank()) {
+                return; // the primary's contact carries no worker terminal — not a readiness signal
+            }
+            super.markPresent(terminal);
+            sessions.onReady(terminal);
+        }
+    }
+}

bridged/src/main/java/dev/ltms/bridged/session/SessionReaper.java

@@ -0,0 +1,70 @@
+package dev.ltms.bridged.session;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Periodic virtual-thread reaper that tears down {@code READY}/{@code DONE} sessions which have
+ * exceeded their idle TTL. Modeled on {@link dev.ltms.bridged.inject.StatusPoller}: a single
+ * virtual-thread loop, idempotent start/stop, and no {@code ScheduledExecutorService}.
+ */
+public final class SessionReaper {
+
+    private static final Logger log = LoggerFactory.getLogger(SessionReaper.class);
+    private static final long DEFAULT_INTERVAL_MILLIS = 5000;
+
+    private final SessionManager sessions;
+    private final long idleTtlNanos;
+    private final long intervalMillis;
+    private volatile boolean running;
+    private Thread thread;
+
+    /** Construct a reaper with the default 5-second polling interval. */
+    public SessionReaper(SessionManager sessions, long idleTtlSeconds) {
+        this(sessions, idleTtlSeconds, DEFAULT_INTERVAL_MILLIS);
+    }
+
+    /** Construct a reaper with an explicit polling interval (useful for tests). */
+    public SessionReaper(SessionManager sessions, long idleTtlSeconds, long intervalMillis) {
+        this.sessions = sessions;
+        this.idleTtlNanos = TimeUnit.SECONDS.toNanos(idleTtlSeconds);
+        this.intervalMillis = intervalMillis;
+    }
+
+    /** Start the reaper loop on a virtual thread. Idempotent. */
+    public synchronized void start() {
+        if (running) return;
+        running = true;
+        thread = Thread.ofVirtual().name("session-reaper").start(this::loop);
+        log.info("session reaper started (idle ttl {}s, interval {}ms)",
+                TimeUnit.NANOSECONDS.toSeconds(idleTtlNanos), intervalMillis);
+    }
+
+    private void loop() {
+        while (running) {
+            try {
+                sessions.reapIdle(idleTtlNanos);
+            } catch (RuntimeException e) {
+                log.warn("session reaper iteration failed; continuing", e);
+            }
+            sleep();
+        }
+    }
+
+    private void sleep() {
+        try {
+            Thread.sleep(intervalMillis);
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+            running = false;
+        }
+    }
+
+    /** Stop the reaper loop. Idempotent. */
+    public synchronized void stop() {
+        running = false;
+        if (thread != null) thread.interrupt();
+    }
+}

bridged/src/main/java/dev/ltms/bridged/session/WorktreeException.java

@@ -0,0 +1,12 @@
+package dev.ltms.bridged.session;
+
+/** Non-zero exit or I/O failure from a git worktree operation. */
+public final class WorktreeException extends RuntimeException {
+    public WorktreeException(String message) {
+        super(message);
+    }
+
+    public WorktreeException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}

bridged/src/main/java/dev/ltms/bridged/session/WorktreeRequest.java

@@ -0,0 +1,6 @@
+package dev.ltms.bridged.session;
+
+/** Ask {@link SessionManager#acquire} to provision an isolated worktree. null ⇒ run in the shared primary tree. */
+public record WorktreeRequest(String ticketSlug, String baseRef) {
+    // ticketSlug seeds the branch name; baseRef null/blank ⇒ current HEAD of the repo.
+}

bridged/src/main/java/dev/ltms/bridged/session/Worktrees.java

@@ -0,0 +1,18 @@
+package dev.ltms.bridged.session;
+
+import java.util.List;
+
+/** Seam between {@link SessionManager} and git worktree operations. Tests use a recording fake. */
+public interface Worktrees {
+    /** git -C <repoRoot> worktree add <path> -b <branch> <baseRef|HEAD>. Returns the worktree path. */
+    String add(String repoRoot, String branch, String baseRef);
+
+    /** git -C <repoRoot> worktree remove --force <path>. Idempotent (already-gone tolerated). */
+    void remove(String repoRoot, String worktreePath);
+
+    /** Copy each existing overlay path repoRoot→worktree; mark tracked ones --skip-worktree. */
+    void overlayParity(String repoRoot, String worktreePath, List<String> overlay);
+
+    /** git -C <cwd> rev-parse --show-toplevel — the repo root that owns cwd. */
+    String repoRoot(String cwd);
+}

bridged/src/main/java/dev/ltms/bridged/worker/WorkerService.java

@@ -1,206 +0,0 @@
-package dev.ltms.bridged.worker;
-
-import dev.ltms.bridged.config.BridgedConfig;
-import dev.ltms.bridged.guard.SubscriptionGuard;
-import dev.ltms.bridged.herdr.Agent;
-import dev.ltms.bridged.herdr.AgentControl;
-import dev.ltms.bridged.herdr.HerdrException;
-import dev.ltms.bridged.herdr.Tab;
-import dev.ltms.bridged.herdr.Workspace;
-import dev.ltms.bridged.herdr.WorkspaceControl;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import java.security.SecureRandom;
-import java.util.LinkedHashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.concurrent.atomic.AtomicLong;
-import java.util.function.Function;
-
-/**
- * Spawns and lists worker sessions — the safe path from a delegation request to a
- * running off-subscription Claude.
- *
- * <p>The spawn sequence encodes the subscription boundary: build the worker env with
- * {@code ANTHROPIC_BASE_URL}, assert that host is on the allowlist <em>before</em>
- * touching herdr, and only then {@code agent.start}. A worker's base_url lives in the
- * env map handed to herdr and nowhere else; {@code bridged}'s own environment is never
- * mutated.
- *
- * <p>Placement: in the default {@code tab} policy a worker lands in its own tab inside a
- * dedicated worker space (found-or-created once, then shared), so workers never split or
- * clutter the user's real work spaces. Teardown removes the worker's pane <em>and</em> its
- * now-empty tab, tolerating an already-gone worker so a repeated DELETE is harmless.
- */
-public final class WorkerService {
-
-    private static final Logger log = LoggerFactory.getLogger(WorkerService.class);
-
-    /** herdr rejects a duplicate agent {@code name}; we retry a bumped name this many times. */
-    private static final int NAME_RETRIES = 8;
-
-    private final AgentControl agents;
-    private final WorkspaceControl spaces;
-    private final SubscriptionGuard guard;
-    private final BridgedConfig.Worker cfg;
-    private final Function<String, String> env; // host env lookup (injectable for tests)
-    private final AtomicLong nameSeq = new AtomicLong(); // per-worker counter (also the tab #)
-    // Per-process token mixed into each worker name so a fresh process (nameSeq back at 0)
-    // cannot collide with same-profile workers that outlived a restart. See startUniquelyNamed.
-    private final String nameNonce = String.format("%06x", new SecureRandom().nextInt(1 << 24));
-
-    public WorkerService(AgentControl agents, WorkspaceControl spaces, SubscriptionGuard guard,
-                         BridgedConfig.Worker cfg, Function<String, String> env) {
-        this.agents = agents;
-        this.spaces = spaces;
-        this.guard = guard;
-        this.cfg = cfg;
-        this.env = env;
-    }
-
-    /** Spawn a worker for the configured profile. Guard runs before any herdr call. */
-    public Agent spawn() {
-        String baseUrl = cfg.baseUrl();
-        guard.assertWorker(baseUrl); // hard stop before we spawn anything
-
-        Map<String, String> workerEnv = new LinkedHashMap<>();
-        workerEnv.put("ANTHROPIC_BASE_URL", baseUrl);
-        putIfPresent(workerEnv, "ANTHROPIC_MODEL", cfg.model());
-        putIfPresent(workerEnv, "CLAUDE_CONFIG_DIR", cfg.configDir());
-        String token = env.apply(cfg.tokenEnv());
-        putIfPresent(workerEnv, "ANTHROPIC_AUTH_TOKEN", token);
-
-        return cfg.tabPlacement() ? spawnInTab(workerEnv) : spawnAsPane(workerEnv);
-    }
-
-    /** Dedicated worker space → own tab → drop the placeholder shell so only the worker remains. */
-    private Agent spawnInTab(Map<String, String> workerEnv) {
-        Workspace space = spaces.ensureWorkspace(cfg.workspace());
-        Tab.Created tab = spaces.createTab(space.workspaceId());
-        log.info("spawning worker profile={} base_url={} space={} tab={}",
-                cfg.profile(), cfg.baseUrl(), space.workspaceId(), tab.tab().tabId());
-
-        Started started;
-        try {
-            started = startUniquelyNamed(workerEnv, tab.tab().tabId());
-        } catch (RuntimeException e) {
-            // The worker never started — don't leave the tab we just created orphaned.
-            // Best-effort cleanup; never let it mask the real spawn failure.
-            try {
-                spaces.closeTab(tab.tab().tabId());
-            } catch (RuntimeException cleanup) {
-                log.warn("failed to close orphaned tab {} after spawn error: {}",
-                        tab.tab().tabId(), cleanup.getMessage());
-            }
-            throw e;
-        }
-
-        // The worker is LIVE now. The remaining steps are cosmetic (drop herdr's seed shell
-        // so the tab holds only the worker; label the tab). They must not fail the spawn or
-        // orphan the running worker — on error we log and still return it so the caller gets
-        // its paneId and can tear it down.
-        if (tab.rootPaneId() != null) {
-            tidy("close seed pane " + tab.rootPaneId(), () -> agents.close(tab.rootPaneId()));
-        } else {
-            log.warn("tab {} had no seed pane in the create response; worker tab may hold an extra pane",
-                    tab.tab().tabId());
-        }
-        tidy("label tab " + tab.tab().tabId(),
-                () -> spaces.renameTab(tab.tab().tabId(), cfg.renderTabLabel(started.seq())));
-        log.info("worker started pane={} tab={} terminal={}",
-                started.agent().paneId(), started.agent().tabId(), started.agent().terminalId());
-        return started.agent();
-    }
-
-    /** Run a best-effort post-start cleanup step, logging (not throwing) on failure. */
-    private void tidy(String what, Runnable step) {
-        try {
-            step.run();
-        } catch (RuntimeException e) {
-            log.warn("post-start step failed ({}) — worker is running regardless: {}", what, e.getMessage());
-        }
-    }
-
-    /** Legacy placement: herdr splits the currently-focused tab. */
-    private Agent spawnAsPane(Map<String, String> workerEnv) {
-        log.info("spawning worker (pane placement) profile={} base_url={} argv={}",
-                cfg.profile(), cfg.baseUrl(), cfg.argv());
-        Agent worker = startUniquelyNamed(workerEnv, null).agent();
-        log.info("worker started pane={} terminal={}", worker.paneId(), worker.terminalId());
-        return worker;
-    }
-
-    /** A started worker together with the sequence its unique name/label used. */
-    private record Started(Agent agent, long seq) {
-    }
-
-    /**
-     * Start the worker under a unique herdr agent name. herdr requires each running
-     * agent's {@code name} to be distinct (a 2nd {@code name:"claude"} fails
-     * {@code agent_name_taken}) — the exact case that makes multiple workers useful. The name
-     * is {@code claude-<profile>-<nonce>-<seq>}: {@code seq} distinguishes workers within this
-     * process, and the per-process {@code nonce} keeps a fresh process (whose {@code seq}
-     * restarts at 0) from colliding with same-profile workers that outlived a restart. The
-     * retry is a belt-and-braces backstop for the astronomically unlikely nonce+seq clash;
-     * the name is a label only — herdr detects kind and status from terminal output, not it.
-     */
-    private Started startUniquelyNamed(Map<String, String> workerEnv, String tabId) {
-        HerdrException last = null;
-        for (int attempt = 0; attempt < NAME_RETRIES; attempt++) {
-            long seq = nameSeq.incrementAndGet();
-            String name = "claude-" + cfg.profile() + "-" + nameNonce + "-" + seq;
-            try {
-                return new Started(agents.start(name, cfg.argv(), workerEnv, tabId), seq);
-            } catch (HerdrException e) {
-                if (!"agent_name_taken".equals(e.code())) throw e;
-                log.debug("worker name '{}' taken, retrying", name);
-                last = e;
-            }
-        }
-        throw last;
-    }
-
-    /** All herdr-tracked agents — discovery for "what workers exist". */
-    public List<Agent> list() {
-        return agents.list();
-    }
-
-    /**
-     * Tear a worker down by pane id: close the pane, and close its tab <em>only</em> when the
-     * worker is that tab's sole occupant. The single-pane check is what makes this safe
-     * regardless of how the worker was placed (or a placement-config change across a restart):
-     * a pane-placement worker sitting in one of the user's shared tabs has siblings, so its
-     * tab is never closed — we only ever remove a tab we created to hold one worker.
-     *
-     * <p>Resolves the tab from the pane <em>before</em> closing it. An already-gone pane/tab
-     * (repeated DELETE, crashed worker) is treated as success; any other failure propagates so
-     * a genuinely failed teardown is not reported as done.
-     */
-    public void stop(String paneId) {
-        WorkspaceControl.PaneLocation loc = cfg.tabPlacement() ? spaces.locatePane(paneId) : null;
-        try {
-            agents.close(paneId);
-        } catch (HerdrException e) {
-            if (!isAlreadyGone(e)) throw e;
-            log.debug("pane.close({}) ignored — already gone: {}", paneId, e.getMessage());
-        }
-        if (loc != null && loc.tabPaneCount() == 1) {
-            spaces.closeTab(loc.tabId());
-        } else if (loc != null) {
-            log.debug("not closing tab {} — it holds {} panes (not a dedicated worker tab)",
-                    loc.tabId(), loc.tabPaneCount());
-        }
-    }
-
-    /** True when a herdr error means the target is already gone (safe to treat as done). */
-    private static boolean isAlreadyGone(HerdrException e) {
-        return e.code() != null && e.code().endsWith("_not_found");
-    }
-
-    private static void putIfPresent(Map<String, String> m, String k, String v) {
-        if (v != null && !v.isBlank()) {
-            m.put(k, v);
-        }
-    }
-}

bridged/src/main/resources/logback.xml

@@ -5,10 +5,39 @@
         </encoder>
     </appender>
 
+    <!--
+      CB-505 audit trail. Its own file, deliberately not the app log: privileged actions
+      (spawn/stop/send/reply/drain) must stay greppable and shippable without dragging DEBUG noise
+      along. AuditLog emits a complete JSON object including its own ISO-8601 "ts" field, so the
+      pattern is a bare %msg — a pattern that spliced literal braces around the message would
+      collide with logback's own variable substitution. Rolls daily, 30 days retained, 100MB cap.
+
+      NOTE: records carry who/what/target/outcome only. Message CONTENT is never written here —
+      this bridge carries source code and prompts, and an audit log that accumulated them would be
+      a transcript archive rather than a control.
+    -->
+    <appender name="AUDIT" class="ch.qos.logback.core.rolling.RollingFileAppender">
+        <file>logs/audit.log</file>
+        <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
+            <fileNamePattern>logs/audit.%d{yyyy-MM-dd}.%i.log</fileNamePattern>
+            <maxFileSize>10MB</maxFileSize>
+            <maxHistory>30</maxHistory>
+            <totalSizeCap>100MB</totalSizeCap>
+        </rollingPolicy>
+        <encoder>
+            <pattern>%msg%n</pattern>
+        </encoder>
+    </appender>
+
     <logger name="dev.ltms.bridged" level="DEBUG"/>
     <logger name="io.javalin" level="INFO"/>
     <logger name="org.eclipse.jetty" level="WARN"/>
 
+    <!-- additivity=false keeps the audit stream out of stdout; it is its own record. -->
+    <logger name="audit" level="INFO" additivity="false">
+        <appender-ref ref="AUDIT"/>
+    </logger>
+
     <root level="INFO">
         <appender-ref ref="STDOUT"/>
     </root>

bridged/src/test/java/dev/ltms/bridged/BridgedDeliverabilityTest.java

@@ -0,0 +1,86 @@
+package dev.ltms.bridged;
+
+import dev.ltms.bridged.inject.MemberPresence;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.Predicate;
+import java.util.function.Supplier;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * CB-534: the injector's readiness gate must open for a lead as well as for a present worker.
+ *
+ * <p>The bug these cover was silent and slow: a lead was never marked present (only workers are), so
+ * every lead→lead delivery sat on the gate for the full readiness grace and failed ~60s later without
+ * a keystroke ever reaching the pane.
+ */
+class BridgedDeliverabilityTest {
+
+    private static Supplier<Map<String, String>> leads(Map<String, String> m) {
+        return () -> m;
+    }
+
+    @Test
+    @DisplayName("a worker that has connected its MCP is deliverable")
+    void presentWorkerIsDeliverable() {
+        MemberPresence presence = new MemberPresence();
+        presence.markPresent("term_worker");
+
+        assertTrue(Bridged.deliverableTo(presence, leads(Map.of())).test("term_worker"));
+    }
+
+    @Test
+    @DisplayName("a worker still in its boot window is held back")
+    void absentWorkerIsNotDeliverable() {
+        assertFalse(Bridged.deliverableTo(new MemberPresence(), leads(Map.of())).test("term_booting"));
+    }
+
+    @Test
+    @DisplayName("a lead is deliverable without ever being marked present")
+    void leadIsDeliverableWithoutPresence() {
+        MemberPresence presence = new MemberPresence();
+        Predicate<String> deliverable =
+                Bridged.deliverableTo(presence, leads(Map.of("term_lead", "opus-5.0")));
+
+        assertFalse(presence.isPresent("term_lead"), "a lead is never enrolled in worker presence");
+        assertTrue(deliverable.test("term_lead"), "…and must be deliverable anyway");
+    }
+
+    @Test
+    @DisplayName("an unknown terminal is deliverable to neither")
+    void strangerIsNotDeliverable() {
+        MemberPresence presence = new MemberPresence();
+        presence.markPresent("term_worker");
+
+        assertFalse(Bridged.deliverableTo(presence, leads(Map.of("term_lead", "opus-5.0")))
+                .test("term_stranger"));
+    }
+
+    @Test
+    @DisplayName("a lead discovered after startup becomes deliverable with no restart")
+    void leadSetIsReadThroughOnEveryCall() {
+        Map<String, String> discovered = new HashMap<>();
+        Predicate<String> deliverable = Bridged.deliverableTo(new MemberPresence(), leads(discovered));
+
+        assertFalse(deliverable.test("term_late"));
+        discovered.put("term_late", "gpt-sol-5.6"); // leadScan picks up a newly labelled tab
+        assertTrue(deliverable.test("term_late"), "the supplier must be re-read, not snapshotted");
+    }
+
+    @Test
+    @DisplayName("forgetting a torn-down worker does not strip a lead of its deliverability")
+    void forgetDoesNotDisarmALead() {
+        MemberPresence presence = new MemberPresence();
+        Predicate<String> deliverable =
+                Bridged.deliverableTo(presence, leads(Map.of("term_lead", "opus-5.0")));
+
+        presence.forget("term_lead"); // the injector's cleanup path runs against every target
+
+        assertTrue(deliverable.test("term_lead"));
+    }
+}

bridged/src/test/java/dev/ltms/bridged/auth/AuditLogTest.java

@@ -0,0 +1,100 @@
+package dev.ltms.bridged.auth;
+
+import ch.qos.logback.classic.Level;
+import ch.qos.logback.classic.LoggerContext;
+import ch.qos.logback.classic.spi.ILoggingEvent;
+import ch.qos.logback.core.read.ListAppender;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.slf4j.LoggerFactory;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * CB-505 — the audit record's shape.
+ *
+ * <p>These exist because the first cut of this feature emitted lines that were <em>not</em> valid
+ * JSON: the timestamp was spliced on by a logback pattern whose literal braces collided with
+ * logback's variable substitution. The appender failed to parse, and nothing in the build noticed.
+ * An audit trail that silently stops being machine-readable is worse than none.
+ */
+class AuditLogTest {
+
+    private final ObjectMapper mapper = new ObjectMapper();
+    private ListAppender<ILoggingEvent> appender;
+    private ch.qos.logback.classic.Logger auditLogger;
+
+    @BeforeEach
+    void attach() {
+        LoggerContext ctx = (LoggerContext) LoggerFactory.getILoggerFactory();
+        auditLogger = ctx.getLogger("audit");
+        appender = new ListAppender<>();
+        appender.setContext(ctx);
+        appender.start();
+        auditLogger.addAppender(appender);
+        auditLogger.setLevel(Level.INFO);
+    }
+
+    @AfterEach
+    void detach() {
+        auditLogger.detachAppender(appender);
+    }
+
+    private JsonNode onlyRecord() throws Exception {
+        assertEquals(1, appender.list.size(), "exactly one audit line expected");
+        String line = appender.list.getFirst().getFormattedMessage();
+        return mapper.readTree(line); // throws if the line is not valid JSON
+    }
+
+    @Test
+    void anAllowedActionIsRecordedAsValidJson() throws Exception {
+        AuditLog.allowed(Principal.primary(4242), Authz.Action.SPAWN, "term_a");
+
+        JsonNode r = onlyRecord();
+        assertEquals("PRIMARY", r.path("role").asText());
+        assertEquals("primary", r.path("actor").asText());
+        assertEquals(4242, r.path("pid").asLong());
+        assertEquals("SPAWN", r.path("action").asText());
+        assertEquals("term_a", r.path("target").asText());
+        assertEquals("allowed", r.path("outcome").asText());
+        assertFalse(r.path("ts").asText().isBlank(), "every record carries its own timestamp");
+    }
+
+    @Test
+    void aDenialRecordsTheReason() throws Exception {
+        AuditLog.denied(Principal.worker("term_b", 7), Authz.Action.REPLY, "term_a", "forbidden");
+
+        JsonNode r = onlyRecord();
+        assertEquals("WORKER", r.path("role").asText());
+        assertEquals("worker:term_b", r.path("actor").asText());
+        assertEquals("denied", r.path("outcome").asText());
+        assertEquals("forbidden", r.path("reason").asText());
+    }
+
+    @Test
+    void aNullCallerIsRecordedAsAnonymousRatherThanCrashing() throws Exception {
+        AuditLog.failed(null, Authz.Action.SEND, null, "herdr unreachable");
+
+        JsonNode r = onlyRecord();
+        assertEquals("ANONYMOUS", r.path("role").asText());
+        assertTrue(r.path("target").isNull(), "an absent target is JSON null, not the string \"null\"");
+        assertEquals("failed", r.path("outcome").asText());
+    }
+
+    @Test
+    void hostileValuesAreEscapedAndCannotForgeAnExtraRecord() throws Exception {
+        // A target id containing a quote and a newline must not be able to terminate the JSON
+        // object early and inject a second, attacker-shaped audit line.
+        AuditLog.denied(Principal.worker("term_a", 1), Authz.Action.REPLY,
+                "evil\",\"outcome\":\"allowed\"}\n{\"forged\":true", "forbidden");
+
+        JsonNode r = onlyRecord();
+        assertEquals("denied", r.path("outcome").asText(),
+                "the injected outcome must not override the real one");
+        assertTrue(r.path("target").asText().contains("forged"),
+                "the hostile text survives as inert data inside the target field");
+    }
+}

bridged/src/test/java/dev/ltms/bridged/auth/AuthzTest.java

@@ -0,0 +1,124 @@
+package dev.ltms.bridged.auth;
+
+import org.junit.jupiter.api.Test;
+
+import static dev.ltms.bridged.auth.Authz.Action.*;
+import static org.junit.jupiter.api.Assertions.*;
+
+/** CB-505 — the authorization table, pinned so it cannot drift silently. */
+class AuthzTest {
+
+    private static final Principal PRIMARY = Principal.primary(100);
+    private static final Principal WORKER_A = Principal.worker("term_a", 200);
+    private static final Principal WORKER_B = Principal.worker("term_b", 300);
+    private static final Principal ANON = Principal.anonymous();
+    private static final Principal ARCH_DESIGN = Principal.architect("lead-designer", "term_design", 400);
+    private static final Principal ARCH_OTHER = Principal.architect("reviewer", "term_review", 500);
+
+    @Test
+    void anonymousIsAuthorizedForNothing() {
+        for (Authz.Action a : Authz.Action.values()) {
+            assertFalse(Authz.permits(ANON, a, "term_a"),
+                    a + " must be refused to an unauthenticated caller");
+        }
+    }
+
+    @Test
+    void aNullCallerIsTreatedAsAnonymous() {
+        assertFalse(Authz.permits(null, READ, null));
+        assertTrue(Authz.isUnauthenticated(null));
+    }
+
+    @Test
+    void orchestrationBelongsToThePrimaryAlone() {
+        for (Authz.Action a : new Authz.Action[]{SPAWN, STOP, SEND, DRAIN}) {
+            assertTrue(Authz.permits(PRIMARY, a, "term_a"), "the primary orchestrates: " + a);
+            assertFalse(Authz.permits(WORKER_A, a, "term_a"),
+                    "a worker performing " + a + " would be escalating into the orchestrator role");
+        }
+    }
+
+    @Test
+    void aWorkerMayReplyAndAskOnlyAsItself() {
+        assertTrue(Authz.permits(WORKER_A, REPLY, "term_a"));
+        assertTrue(Authz.permits(WORKER_A, ASK, "term_a"));
+
+        assertFalse(Authz.permits(WORKER_A, REPLY, "term_b"),
+                "worker A must not be able to reply on worker B's session");
+        assertFalse(Authz.permits(WORKER_B, ASK, "term_a"),
+                "worker B must not be able to ask as worker A");
+    }
+
+    @Test
+    void thePrimaryMayNotForgeAWorkersReply() {
+        // Not a hypothetical nicety: a forged reply would resolve the rendezvous the primary is
+        // itself blocked on, corrupting the correlation between a turn and its answer.
+        assertFalse(Authz.permits(PRIMARY, REPLY, "term_a"));
+        assertFalse(Authz.permits(PRIMARY, ASK, "term_a"));
+    }
+
+    @Test
+    void aWorkerWithNoTargetCannotReply() {
+        assertFalse(Authz.permits(WORKER_A, REPLY, null),
+                "an absent session id must not satisfy the own-session rule");
+    }
+
+    // ── CB-548: the architect matrix ───────────────────────────────────────────────────────────
+
+    @Test
+    void anArchitectMaySendButNotSpawnStopOrDrain() {
+        assertTrue(Authz.permits(ARCH_DESIGN, SEND, "term_worker"),
+                "delegating a turn to a worker IS the architect's job");
+        assertTrue(Authz.permits(ARCH_DESIGN, SEND, null));
+
+        for (Authz.Action a : new Authz.Action[]{SPAWN, STOP, DRAIN}) {
+            assertFalse(Authz.permits(ARCH_DESIGN, a, null),
+                    "an architect must not " + a + " — fleet lifecycle is the primary's alone, so "
+                            + "a coordinator cannot also stand up or tear down the fleet");
+        }
+    }
+
+    @Test
+    void anArchitectMayReplyAndAskOnlyAsItsOwnPane() {
+        assertTrue(Authz.permits(ARCH_DESIGN, REPLY, "term_design"), "its own pane is its own");
+        assertTrue(Authz.permits(ARCH_DESIGN, ASK, "term_design"));
+
+        assertFalse(Authz.permits(ARCH_DESIGN, REPLY, "term_review"),
+                "architect 'lead-designer' must not reply on reviewer's pane");
+        assertFalse(Authz.permits(ARCH_OTHER, ASK, "term_design"),
+                "reviewer must not ask as lead-designer — no terminal is another's");
+        assertFalse(Authz.permits(ARCH_DESIGN, REPLY, null),
+                "an absent target must not pass the own-session rule");
+    }
+
+    @Test
+    void anArchitectMayReadAndScrapeMetrics() {
+        assertTrue(Authz.permits(ARCH_DESIGN, READ, null));
+        assertTrue(Authz.permits(ARCH_DESIGN, METRICS, null));
+    }
+
+    @Test
+    void anArchitectIsNotCountedAsPrimaryOrWorker() {
+        assertFalse(Authz.permits(ARCH_DESIGN, SPAWN, null), "not a primary — no lifecycle");
+        assertFalse(ARCH_DESIGN.isPrimary());
+        assertFalse(ARCH_DESIGN.isWorker(), "an architect is its own role, not a widened worker");
+        assertTrue(ARCH_DESIGN.isArchitect());
+    }
+
+    @Test
+    void observationIsOpenToBothAuthenticatedRoles() {
+        assertTrue(Authz.permits(PRIMARY, READ, null));
+        assertTrue(Authz.permits(WORKER_A, READ, null));
+        assertTrue(Authz.permits(PRIMARY, METRICS, null));
+        assertTrue(Authz.permits(WORKER_A, METRICS, null));
+    }
+
+    @Test
+    void unauthenticatedIsDistinguishedFromMerelyForbidden() {
+        // Drives the 401-vs-403 split: a missing credential is fixable by the caller, a wrong role
+        // is not.
+        assertTrue(Authz.isUnauthenticated(ANON));
+        assertFalse(Authz.isUnauthenticated(WORKER_A));
+        assertFalse(Authz.isUnauthenticated(PRIMARY));
+    }
+}

bridged/src/test/java/dev/ltms/bridged/auth/CallerResolverTest.java

@@ -0,0 +1,416 @@
+package dev.ltms.bridged.auth;
+
+import dev.ltms.bridged.herdr.FakeHerdr;
+import dev.ltms.bridged.herdr.PaneLocator;
+import dev.ltms.bridged.mcp.ConnectionIdentity;
+import dev.ltms.bridged.config.BridgedConfig;
+import dev.ltms.bridged.peer.MemberRole;
+import org.junit.jupiter.api.Test;
+
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * CB-501. The behaviour under test is the inversion of the pre-CB-501 default: failing every
+ * identity check must yield {@link Role#ANONYMOUS}, not {@code PRIMARY}.
+ */
+class CallerResolverTest {
+
+    private final FakeHerdr herdr = new FakeHerdr();
+
+    /** Identity resolving the canned worker pane, keyed off a faked peer-PID lookup. */
+    private ConnectionIdentity identity(long pid) {
+        return new ConnectionIdentity(new PaneLocator(herdr), _ -> pid);
+    }
+
+    /** A PID that owns a worker pane in the fake. */
+    private ConnectionIdentity workerIdentity() {
+        return identity(FakeHerdr.WORKER_PID);
+    }
+
+    /** A PID that owns no pane — i.e. the primary, or any other local process. */
+    private ConnectionIdentity nonWorkerIdentity() {
+        return identity(999_999);
+    }
+
+    private static MemberRegistry boundMembers(String slot, MemberRole role) {
+        Map<String, BridgedConfig.Slot> architects = role == MemberRole.ARCHITECT
+                ? Map.of("lead-designer", new BridgedConfig.Slot("sonnet")) : Map.of();
+        Map<String, BridgedConfig.Slot> devs = role == MemberRole.DEV
+                ? Map.of("builder", new BridgedConfig.Slot("sonnet")) : Map.of();
+        MemberRegistry members = new MemberRegistry(
+                new BridgedConfig.Fleet(Map.of(), architects, devs, Map.of(), null));
+        assertTrue(members.bind(slot, "term_a"));
+        return members;
+    }
+
+    @Test
+    void aLoopbackWorkerPaneResolvesToWorkerRegardlessOfAuthMode() {
+        Principal underTrust = new CallerResolver(workerIdentity()).resolve("127.0.0.1", 42, null);
+        Principal underToken = new CallerResolver(workerIdentity(), true, "s3cret")
+                .resolve("127.0.0.1", 42, null);
+
+        assertEquals(Role.WORKER, underTrust.role());
+        assertEquals("term_a", underTrust.terminal());
+        assertEquals(Role.WORKER, underToken.role(),
+                "worker identity is unforgeable and must never be token-gated — otherwise enabling "
+                        + "auth would lock the whole fleet out of bridge_reply");
+        assertEquals("term_a", underToken.terminal());
+    }
+
+    @Test
+    void aPinnedPrimaryTerminalResolvesToPrimaryNotWorker() {
+        // The primary's own session lives in a herdr pane (term_a here). Without the pin the pane
+        // match wins and the primary is locked out of spawn/send/stop as a misread worker.
+        Principal p = CallerResolver.pinnedTo(workerIdentity(), false, null, "term_a")
+                .resolve("127.0.0.1", 42, null);
+
+        assertEquals(Role.PRIMARY, p.role());
+    }
+
+    @Test
+    void aPinnedPrimaryTerminalNeedsNoTokenEvenInTokenMode() {
+        Principal p = CallerResolver.pinnedTo(workerIdentity(), true, "s3cret", "term_a")
+                .resolve("127.0.0.1", 42, null);
+
+        assertEquals(Role.PRIMARY, p.role(),
+                "the pane mapping is as unforgeable as a worker's — the pin outranks the token path");
+    }
+
+    @Test
+    void otherPanesRemainWorkersWhenAPinIsSet() {
+        Principal p = CallerResolver.pinnedTo(workerIdentity(), false, null, "term_someone_else")
+                .resolve("127.0.0.1", 42, null);
+
+        assertEquals(Role.WORKER, p.role());
+        assertEquals("term_a", p.terminal());
+    }
+
+    /** The pin is optional config, so an absent or whitespace one must change nothing at all. */
+    @Test
+    void aBlankPinLeavesWorkerResolutionUntouched() {
+        assertEquals(Role.WORKER,
+                CallerResolver.pinnedTo(workerIdentity(), false, null, "  ").resolve("127.0.0.1", 42, null).role());
+        assertEquals(Role.WORKER,
+                CallerResolver.pinnedTo(workerIdentity(), false, null, null).resolve("127.0.0.1", 42, null).role());
+    }
+
+    @Test
+    void loopbackTrustTreatsANonWorkerLoopbackCallerAsThePrimary() {
+        Principal p = new CallerResolver(nonWorkerIdentity()).resolve("127.0.0.1", 99, null);
+
+        assertEquals(Role.PRIMARY, p.role(), "the historical behaviour, now an explicit choice");
+    }
+
+    @Test
+    void tokenModeRefusesANonWorkerCallerThatPresentsNoToken() {
+        Principal p = new CallerResolver(nonWorkerIdentity(), true, "s3cret")
+                .resolve("127.0.0.1", 99, null);
+
+        assertEquals(Role.ANONYMOUS, p.role(),
+                "no credential must mean NOTHING, not the most privileged role on the bus");
+    }
+
+    @Test
+    void tokenModeAcceptsAValidBearerTokenAsThePrimary() {
+        Principal p = new CallerResolver(nonWorkerIdentity(), true, "s3cret")
+                .resolve("127.0.0.1", 99, "Bearer s3cret");
+
+        assertEquals(Role.PRIMARY, p.role());
+    }
+
+    @Test
+    void tokenModeRejectsAWrongOrMalformedCredential() {
+        CallerResolver r = new CallerResolver(nonWorkerIdentity(), true, "s3cret");
+
+        assertEquals(Role.ANONYMOUS, r.resolve("127.0.0.1", 99, "Bearer wrong").role());
+        assertEquals(Role.ANONYMOUS, r.resolve("127.0.0.1", 99, "s3cret").role(), "scheme required");
+        assertEquals(Role.ANONYMOUS, r.resolve("127.0.0.1", 99, "Bearer ").role(), "empty credential");
+        assertEquals(Role.ANONYMOUS, r.resolve("127.0.0.1", 99, "Basic s3cret").role(), "wrong scheme");
+    }
+
+    @Test
+    void theBearerSchemeIsCaseInsensitivePerRfc7235() {
+        CallerResolver r = new CallerResolver(nonWorkerIdentity(), true, "s3cret");
+
+        assertEquals(Role.PRIMARY, r.resolve("127.0.0.1", 99, "bearer s3cret").role());
+        assertEquals(Role.PRIMARY, r.resolve("127.0.0.1", 99, "BEARER s3cret").role());
+    }
+
+    @Test
+    void aNonLoopbackCallerIsNeverThePrimaryUnderLoopbackTrust() {
+        // Defence in depth: startup already refuses this pairing (validateAuthExposure), but if a
+        // proxy ever forwards a remote peer onto the loopback listener, the resolver must not
+        // hand it the primary role.
+        Principal p = new CallerResolver(nonWorkerIdentity()).resolve("10.0.0.7", 99, null);
+
+        assertEquals(Role.ANONYMOUS, p.role());
+    }
+
+    // ── CB-530: the leaders registry ────────────────────────────────────────────────────────────
+    // The fake resolves exactly one pane (term_a) from a PID, so "two leads both resolve" is
+    // asserted at the config layer (BridgedConfigTest#leaderTerminals…). What matters here is that
+    // resolution is a REGISTRY LOOKUP rather than a single equality test against one pin.
+
+    @Test
+    void aRegisteredLeadPaneResolvesToPrimaryCarryingItsName() {
+        Principal p = new CallerResolver(workerIdentity(), false, null, Map.of("term_a", "opus-5.0"))
+                .resolve("127.0.0.1", 42, null);
+
+        assertEquals(Role.PRIMARY, p.role());
+        assertEquals("opus-5.0", p.name(), "whoami must be able to say WHICH lead is asking");
+        assertEquals("term_a", p.terminal(),
+                "CB-532: a lead carries the pane it was matched by. Without it ownsSession() can "
+                        + "never be true for a lead, so it can send to a peer but never answer one");
+    }
+
+    @Test
+    void aSecondLeadIsRecognisedRatherThanSilentlyDemoted() {
+        // The regression this feature exists for: with a singular pin, whichever lead was not the
+        // pin resolved as a worker and was refused every orchestration call.
+        Principal p = new CallerResolver(workerIdentity(), false, null,
+                Map.of("term_elsewhere", "gpt-sol-5.6", "term_a", "opus-5.0"))
+                .resolve("127.0.0.1", 42, null);
+
+        assertEquals(Role.PRIMARY, p.role());
+        assertEquals("opus-5.0", p.name());
+    }
+
+    @Test
+    void aPaneAbsentFromTheRegistryIsStillAWorker() {
+        Principal p = new CallerResolver(workerIdentity(), false, null,
+                Map.of("term_elsewhere", "gpt-sol-5.6"))
+                .resolve("127.0.0.1", 42, null);
+
+        assertEquals(Role.WORKER, p.role());
+        assertEquals("term_a", p.terminal());
+        assertNull(p.name());
+    }
+
+    @Test
+    void aRegisteredLeadNeedsNoTokenEvenInTokenMode() {
+        Principal p = new CallerResolver(workerIdentity(), true, "s3cret", Map.of("term_a", "opus"))
+                .resolve("127.0.0.1", 42, null);
+
+        assertEquals(Role.PRIMARY, p.role(),
+                "the pane mapping is as unforgeable as a worker's — it outranks the token path");
+        assertEquals("opus", p.name());
+    }
+
+    /** The pre-CB-530 spelling must keep working, exactly, including for configs that never migrate. */
+    @Test
+    void theLegacySinglePinBehavesAsALeadNamedPrimary() {
+        Principal p = CallerResolver.pinnedTo(workerIdentity(), false, null, "term_a")
+                .resolve("127.0.0.1", 42, null);
+
+        assertEquals(Role.PRIMARY, p.role());
+        assertEquals("primary", p.name());
+    }
+
+    @Test
+    void anEmptyRegistryLeavesEveryPaneAWorker() {
+        Map<String, String> noLeads = null;
+        assertEquals(Role.WORKER,
+                new CallerResolver(workerIdentity(), false, null, Map.of())
+                        .resolve("127.0.0.1", 42, null).role());
+        assertEquals(Role.WORKER,
+                new CallerResolver(workerIdentity(), false, null, noLeads)
+                        .resolve("127.0.0.1", 42, null).role());
+        // CB-531: and the same for the live-registry form, whose supplier may also be absent.
+        assertEquals(Role.WORKER,
+                CallerResolver.withLeads(workerIdentity(), false, null, null)
+                        .resolve("127.0.0.1", 42, null).role());
+    }
+
+    /** The audit line must distinguish leads once several exist, or a log says nothing useful. */
+    @Test
+    void describeNamesTheLeadButStillReadsPrimaryWhenUnnamed() {
+        assertEquals("leader:opus-5.0", Principal.leader("opus-5.0", "term_a", 1).describe());
+        assertEquals("primary", Principal.primary(1).describe());
+        assertEquals("worker:term_a", Principal.worker("term_a", 1).describe());
+    }
+
+    // ── CB-532: a lead is an addressable peer, not only a sender ────────────────────────────────
+
+    /**
+     * The regression this ticket exists for: two leads could both be recognised (CB-530/531) and
+     * still not converse, because REPLY is gated on ownsSession() and a lead owned nothing.
+     */
+    @Test
+    void aLeadOwnsItsOwnPaneSoItMayAnswerAPeer() {
+        Principal lead = new CallerResolver(workerIdentity(), false, null, Map.of("term_a", "opus-5.0"))
+                .resolve("127.0.0.1", 42, null);
+
+        assertTrue(lead.ownsSession("term_a"));
+        assertTrue(Authz.permits(lead, Authz.Action.REPLY, "term_a"),
+                "a lead answering a peer replies for its OWN terminal — the rendezvous the sender "
+                        + "opened is keyed on exactly that");
+        assertTrue(Authz.permits(lead, Authz.Action.ASK, "term_a"));
+    }
+
+    @Test
+    void aLeadStillCannotActAsAnyoneElse() {
+        Principal lead = new CallerResolver(workerIdentity(), false, null, Map.of("term_a", "opus-5.0"))
+                .resolve("127.0.0.1", 42, null);
+
+        assertFalse(lead.ownsSession("term_someone_else"));
+        assertFalse(Authz.permits(lead, Authz.Action.REPLY, "term_someone_else"),
+                "widening WHO may reply must not widen WHAT they may reply as");
+    }
+
+    /** A primary with no pane — token mode, or off-host — owns nothing and must stay a sender only. */
+    @Test
+    void anUnnamedPrimaryWithNoPaneOwnsNothing() {
+        Principal p = new CallerResolver(nonWorkerIdentity(), true, "s3cret")
+                .resolve("127.0.0.1", 99, "Bearer s3cret");
+
+        assertEquals(Role.PRIMARY, p.role());
+        assertNull(p.terminal());
+        assertFalse(p.ownsSession(null), "a null terminal must never match a null session id");
+        assertFalse(Authz.permits(p, Authz.Action.REPLY, null));
+    }
+
+    @Test
+    void aLeadKeepsEveryOrchestrationRightItAlreadyHad() {
+        Principal lead = new CallerResolver(workerIdentity(), false, null, Map.of("term_a", "opus-5.0"))
+                .resolve("127.0.0.1", 42, null);
+
+        assertTrue(Authz.permits(lead, Authz.Action.SPAWN, null));
+        assertTrue(Authz.permits(lead, Authz.Action.SEND, "term_worker"));
+        assertTrue(Authz.permits(lead, Authz.Action.STOP, null));
+        assertTrue(Authz.permits(lead, Authz.Action.DRAIN, null));
+    }
+
+    /**
+     * CB-531: the registry is read per resolve, not snapshotted at construction — a lead that
+     * labels its tab after the daemon booted is recognised without a restart.
+     */
+    @Test
+    void aLeadRegisteredAfterConstructionIsHonouredWithoutRebuildingTheResolver() {
+        Map<String, String> live = new java.util.HashMap<>();
+        CallerResolver r = CallerResolver.withLeads(workerIdentity(), false, null, () -> live);
+
+        assertEquals(Role.WORKER, r.resolve("127.0.0.1", 42, null).role());
+
+        live.put("term_a", "gpt-sol-5.6"); // the scanner sees a newly-labelled tab
+
+        Principal p = r.resolve("127.0.0.1", 42, null);
+        assertEquals(Role.PRIMARY, p.role());
+        assertEquals("gpt-sol-5.6", p.name());
+    }
+
+    /** The map form must stay a snapshot: a caller handing over a map is not offering live state. */
+    @Test
+    void theMapFormIsCopiedSoLaterMutationCannotGrantLeadership() {
+        Map<String, String> mutable = new java.util.HashMap<>();
+        CallerResolver r = new CallerResolver(workerIdentity(), false, null, mutable);
+
+        mutable.put("term_a", "sneaky");
+
+        assertEquals(Role.WORKER, r.resolve("127.0.0.1", 42, null).role());
+    }
+
+    // ── CB-548: architect slots ─────────────────────────────────────────────────────────────────
+
+    @Test
+    void aBoundArchitectPaneResolvesToArchitectBeforeTheWorkerFallback() {
+        // This is the production construction path used by Bridged.
+        Principal p = CallerResolver.withLeadsAndMembers(workerIdentity(), false, null,
+                Map::of, boundMembers("architect:lead-designer", MemberRole.ARCHITECT))
+                .resolve("127.0.0.1", 42, null);
+
+        assertEquals(Role.ARCHITECT, p.role(),
+                "a terminal bound to an architect slot is an architect, NOT the generic worker it "
+                        + "would otherwise resolve to");
+        assertEquals("lead-designer", p.name(), "whoami must say WHICH slot is asking");
+        assertEquals("term_a", p.terminal(), "the pane identity is carried so ownsSession works");
+    }
+
+    @Test
+    void anArchitectNeedsNoTokenEvenInTokenMode() {
+        Principal p = CallerResolver.withLeadsAndMembers(workerIdentity(), true, "s3cret",
+                Map::of, boundMembers("architect:lead-designer", MemberRole.ARCHITECT))
+                .resolve("127.0.0.1", 42, null);
+
+        assertEquals(Role.ARCHITECT, p.role(),
+                "the pane mapping is as unforgeable as a worker's — it outranks the token path");
+    }
+
+    @Test
+    void anUnboundPaneStillResolvesAsAWorker() {
+        MemberRegistry members = new MemberRegistry(new BridgedConfig.Fleet(Map.of(),
+                Map.of("lead-designer", new BridgedConfig.Slot("sonnet")), Map.of(), Map.of(), null));
+        Principal p = CallerResolver.withLeadsAndMembers(workerIdentity(), false, null,
+                Map::of, members).resolve("127.0.0.1", 42, null);
+
+        assertEquals(Role.WORKER, p.role());
+        assertNull(p.name());
+    }
+
+    /** CB-548 precedence: lead > architect > worker, so a pane named in BOTH is still a lead. */
+    @Test
+    void aLeadWinsOverAnArchitectBindingForTheSamePane() {
+        Principal p = CallerResolver.withLeadsAndMembers(workerIdentity(), false, null,
+                () -> Map.of("term_a", "opus-5.0"),
+                boundMembers("architect:lead-designer", MemberRole.ARCHITECT))
+                .resolve("127.0.0.1", 42, null);
+
+        assertEquals(Role.PRIMARY, p.role(),
+                "a pane the config calls a lead must keep resolving as a lead — no behaviour change "
+                        + "when an architect binding is added to an existing fleet");
+        assertEquals("opus-5.0", p.name());
+    }
+
+    /** The registry is live, like leads: a binding injected after construction is honoured. */
+    @Test
+    void anArchitectBoundAfterConstructionIsHonouredWithoutRebuildingTheResolver() {
+        MemberRegistry members = new MemberRegistry(new BridgedConfig.Fleet(Map.of(),
+                Map.of("lead-designer", new BridgedConfig.Slot("sonnet")), Map.of(), Map.of(), null));
+        CallerResolver r = CallerResolver.withLeadsAndMembers(workerIdentity(), false, null,
+                Map::of, members);
+
+        assertEquals(Role.WORKER, r.resolve("127.0.0.1", 42, null).role());
+
+        assertTrue(members.bind("architect:lead-designer", "term_a")); // the later lifecycle binds the slot
+
+        assertEquals(Role.ARCHITECT, r.resolve("127.0.0.1", 42, null).role());
+        assertEquals("architect:lead-designer", r.members().get("term_a"));
+    }
+
+    @Test
+    void describeNamesTheArchitectSlot() {
+        assertEquals("architect:lead-designer",
+                Principal.architect("lead-designer", "term_a", 1).describe());
+    }
+
+    /** An architect acts only as its own pane — the same ownsSession rule as a worker or lead. */
+    @Test
+    void anArchitectOwnsItsOwnPaneAndNoOther() {
+        Principal arch = CallerResolver.withLeadsAndMembers(workerIdentity(), false, null,
+                Map::of, boundMembers("architect:lead-designer", MemberRole.ARCHITECT))
+                .resolve("127.0.0.1", 42, null);
+
+        assertTrue(arch.ownsSession("term_a"));
+        assertTrue(Authz.permits(arch, Authz.Action.REPLY, "term_a"));
+        assertFalse(arch.ownsSession("term_b"));
+        assertFalse(Authz.permits(arch, Authz.Action.REPLY, "term_b"));
+    }
+
+    @Test
+    void aBoundNonArchitectSlotStillResolvesAsAWorker() {
+        Principal p = CallerResolver.withLeadsAndMembers(workerIdentity(), false, null,
+                Map::of, boundMembers("dev:builder", MemberRole.DEV))
+                .resolve("127.0.0.1", 42, null);
+
+        assertEquals(Role.WORKER, p.role(), "a dev binding must never grant architect rights");
+    }
+
+    @Test
+    void tokenModeRequiresANonEmptyConfiguredToken() {
+        ConnectionIdentity id = nonWorkerIdentity();
+
+        assertThrows(IllegalArgumentException.class, () -> new CallerResolver(id, true, null));
+        assertThrows(IllegalArgumentException.class, () -> new CallerResolver(id, true, "  "));
+    }
+}

bridged/src/test/java/dev/ltms/bridged/auth/MemberRegistryTest.java

@@ -0,0 +1,269 @@
+package dev.ltms.bridged.auth;
+
+import dev.ltms.bridged.config.BridgedConfig;
+import dev.ltms.bridged.peer.MemberRole;
+import org.junit.jupiter.api.Test;
+
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * CB-548 — the architect-slot registry: the config snapshot of slot → profile, and the live
+ * terminal → slot bindings it owns. The role a binding produces is asserted in
+ * {@link CallerResolverTest}; this pins the registry object itself — its invariants and their
+ * thread-safety.
+ */
+class MemberRegistryTest {
+
+    /**
+     * Slot keys are qualified by role (CB-557): a bare name is unique only within its pool, so
+     * {@code sonnet} can be both a developer and a reviewer, while a terminal binds to exactly one.
+     */
+    private static final String DESIGNER = "architect:lead-designer";
+    private static final String REVIEWER = "architect:code-reviewer";
+
+    private static BridgedConfig.Fleet fleetWith(Map<String, BridgedConfig.Slot> architects) {
+        return new BridgedConfig.Fleet(Map.of(), architects, Map.of(), Map.of(), null);
+    }
+
+    private static Map<String, BridgedConfig.Slot> architects() {
+        Map<String, BridgedConfig.Slot> pool = new LinkedHashMap<>();
+        pool.put("lead-designer", new BridgedConfig.Slot("sonnet"));
+        pool.put("code-reviewer", new BridgedConfig.Slot("gx10"));
+        return pool;
+    }
+
+    private final MemberRegistry registry = new MemberRegistry(fleetWith(architects()));
+
+    @Test
+    void exposesTheConfiguredSlotsQualifiedByRole() {
+        assertEquals(Set.of(DESIGNER, REVIEWER), registry.slots().keySet());
+        assertTrue(registry.isSlot(REVIEWER));
+        assertFalse(registry.isSlot("nope"));
+        assertFalse(registry.isSlot("lead-designer"),
+                "the bare name is not the key — it is unique only inside its pool");
+    }
+
+    /** The case the pool shape exists for: one profile serving two roles is not a duplicate. */
+    @Test
+    void oneProfileMayServeTwoRolesUnderTheSameSlotName() {
+        Map<String, BridgedConfig.Slot> devs = Map.of("sonnet", new BridgedConfig.Slot("sonnet"));
+        Map<String, BridgedConfig.Slot> revs = Map.of("sonnet", new BridgedConfig.Slot("sonnet"));
+        MemberRegistry r = new MemberRegistry(
+                new BridgedConfig.Fleet(Map.of(), Map.of(), devs, revs, null));
+
+        assertEquals(Set.of("dev:sonnet", "reviewer:sonnet"), r.slots().keySet());
+        assertEquals(MemberRole.DEV, r.roleForSlot("dev:sonnet"));
+        assertEquals(MemberRole.REVIEWER, r.roleForSlot("reviewer:sonnet"));
+    }
+
+    @Test
+    void theSpawnLifecycleReadsTheProfileBackFromASlot() {
+        assertEquals("sonnet", registry.profileForSlot(DESIGNER));
+        assertEquals("gx10", registry.profileForSlot(REVIEWER));
+        assertNull(registry.profileForSlot("unknown"), "an unknown slot has no profile");
+    }
+
+    @Test
+    void startsEmptySoNoTerminalResolvesToAnArchitect() {
+        assertTrue(registry.snapshot().isEmpty());
+        assertNull(registry.slotForTerminal("term_design"),
+                "config declares no architect terminal — nothing is recognised until a bind");
+        assertNull(registry.slotForTerminal(null), "no terminal ⇒ no slot");
+    }
+
+    // ── bind ──────────────────────────────────────────────────────────────────────────────────
+
+    @Test
+    void bindResolvesTheTerminalToTheSlot() {
+        assertTrue(registry.bind(DESIGNER, "term_design"));
+        assertEquals(DESIGNER, registry.slotForTerminal("term_design"));
+        assertEquals(Map.of("term_design", DESIGNER), registry.snapshot());
+    }
+
+    @Test
+    void bindRefusesAnUnknownSlot() {
+        assertFalse(registry.bind("nope", "term_x"),
+                "a slot that is not configured must be refused — bind is not a way to invent one");
+        assertNull(registry.slotForTerminal("term_x"));
+    }
+
+    @Test
+    void bindRefusesATerminalInTwoSlots() {
+        assertTrue(registry.bind(DESIGNER, "term_design"));
+        assertFalse(registry.bind(REVIEWER, "term_design"),
+                "a terminal may occupy at most one slot");
+        assertEquals(DESIGNER, registry.slotForTerminal("term_design"),
+                "the first binding survives the refused second");
+    }
+
+    @Test
+    void bindRefusesASlotWithTwoTerminals() {
+        assertTrue(registry.bind(DESIGNER, "term_design"));
+        assertFalse(registry.bind(DESIGNER, "term_other"),
+                "a slot may host at most one terminal");
+        assertEquals(DESIGNER, registry.slotForTerminal("term_design"),
+                "the first binding survives the refused second");
+        assertNull(registry.slotForTerminal("term_other"));
+    }
+
+    @Test
+    void rebindingTheSamePairIsAnIdempotentNoOp() {
+        assertTrue(registry.bind(DESIGNER, "term_design"));
+        assertTrue(registry.bind(DESIGNER, "term_design"),
+                "the same terminal → slot is harmless to repeat");
+        assertEquals(1, registry.snapshot().size());
+    }
+
+    // ── unbind ────────────────────────────────────────────────────────────────────────────────
+
+    @Test
+    void unbindRemovesTheExactBinding() {
+        assertTrue(registry.bind(DESIGNER, "term_design"));
+        assertTrue(registry.unbind(DESIGNER, "term_design"));
+        assertNull(registry.slotForTerminal("term_design"));
+        assertTrue(registry.snapshot().isEmpty());
+    }
+
+    @Test
+    void aStaleUnbindDoesNotRemoveAReplacement() {
+        // Bind, tear down, and stand the slot back up with a NEW terminal.
+        assertTrue(registry.bind(DESIGNER, "term_design"));
+        registry.unbind(DESIGNER, "term_design");
+        assertTrue(registry.bind(DESIGNER, "term_new"));
+
+        // A late unbind naming the OLD terminal must not remove the replacement binding.
+        assertFalse(registry.unbind(DESIGNER, "term_design"));
+        assertEquals(DESIGNER, registry.slotForTerminal("term_new"),
+                "the replacement terminal stays bound");
+    }
+
+    @Test
+    void aStaleUnbindForATerminalThatMovedSlotsDoesNothing() {
+        // term_design starts in lead-designer, is torn down, and stands back up in a FREE slot.
+        assertTrue(registry.bind(DESIGNER, "term_design"));
+        registry.unbind(DESIGNER, "term_design");
+        assertTrue(registry.bind(REVIEWER, "term_design"));
+
+        // Unbinding against the slot it no longer occupies is refused; the new binding is intact.
+        assertFalse(registry.unbind(DESIGNER, "term_design"),
+                "the old slot must not unbind a terminal that moved elsewhere");
+        assertEquals(REVIEWER, registry.slotForTerminal("term_design"));
+    }
+
+    @Test
+    void unbindOfNothingIsAFalseNoOp() {
+        assertFalse(registry.unbind(DESIGNER, "term_design"),
+                "nothing was bound, so nothing is removed");
+    }
+
+    // ── snapshot ─────────────────────────────────────────────────────────────────────────────
+
+    @Test
+    void theSnapshotIsAnImmutableCopyNotAliveState() {
+        assertTrue(registry.bind(DESIGNER, "term_design"));
+        Map<String, String> snap = registry.snapshot();
+
+        assertThrows(UnsupportedOperationException.class, () -> snap.put("x", "y"),
+                "a handed-out snapshot cannot be mutated in place");
+
+        // Later binds must not leak into an earlier snapshot.
+        assertTrue(registry.bind(REVIEWER, "term_review"));
+        assertFalse(snap.containsKey("term_review"),
+                "a snapshot is a point-in-time copy, not a live view");
+    }
+
+    // ── concurrency (CB-548 invariants hold under contention) ─────────────────────────────────
+
+    @Test
+    void concurrentBindsNeverGiveASlotTwoTerminals() throws Exception {
+        int n = 16;
+        ExecutorService pool = Executors.newFixedThreadPool(n);
+        try {
+            CountDownLatch go = new CountDownLatch(1);
+            List<Future<Boolean>> results = new ArrayList<>();
+            for (int i = 0; i < n; i++) {
+                final String term = "term_" + i; // every thread races for the SAME slot
+                results.add(pool.submit(() -> {
+                    go.await();
+                    return registry.bind(DESIGNER, term);
+                }));
+            }
+            go.countDown();
+
+            int won = 0;
+            for (Future<Boolean> r : results) {
+                if (r.get()) {
+                    won++;
+                }
+            }
+            assertEquals(1, won, "exactly one terminal may win the sole slot, got " + won);
+            assertEquals(1, registry.snapshot().size(),
+                    "the slot hosts at most one terminal after the race");
+        } finally {
+            pool.shutdownNow();
+        }
+    }
+
+    @Test
+    void concurrentBindsNeverPutOneTerminalInTwoSlots() throws Exception {
+        int n = 16;
+        ExecutorService pool = Executors.newFixedThreadPool(n);
+        try {
+            CountDownLatch go = new CountDownLatch(1);
+            List<Future<String>> results = new ArrayList<>();
+            for (int i = 0; i < n; i++) {
+                final String slot = (i % 2 == 0) ? DESIGNER : REVIEWER; // all race for ONE terminal
+                results.add(pool.submit(() -> {
+                    go.await();
+                    return registry.bind(slot, "shared_term")
+                            ? registry.slotForTerminal("shared_term") : null;
+                }));
+            }
+            go.countDown();
+
+            // Rebinding the same terminal to the same slot is a harmless idempotent true, so count
+            // winners is not the assertion — agreement is: every thread that reported success must
+            // have seen the terminal in the SAME slot, never in two at once.
+            String bound = null;
+            boolean conflict = false;
+            for (Future<String> r : results) {
+                String s = r.get();
+                if (s != null) {
+                    if (bound == null) {
+                        bound = s;
+                    } else if (!bound.equals(s)) {
+                        conflict = true;
+                    }
+                }
+            }
+            assertFalse(conflict, "a terminal was observed in two slots at once");
+            assertNotNull(bound, "at least one thread bound the terminal");
+            assertEquals(1, registry.snapshot().size(),
+                    "the terminal occupies exactly one slot in the final snapshot");
+            assertEquals(bound, registry.slotForTerminal("shared_term"));
+        } finally {
+            pool.shutdownNow();
+        }
+    }
+
+    /** A handed-over slot map is snapshotted at construction, not offered as live state. */
+    @Test
+    void theSlotSnapshotIsFixedByConstruction() {
+        Map<String, BridgedConfig.Slot> mutable = architects();
+        MemberRegistry r = new MemberRegistry(fleetWith(mutable));
+
+        mutable.put("hijack", new BridgedConfig.Slot("gx10"));
+
+        assertFalse(r.isSlot("architect:hijack"), "a handed-over map is not offered as live state");
+    }
+}

bridged/src/test/java/dev/ltms/bridged/config/ConfigRefTest.java

@@ -0,0 +1,353 @@
+package dev.ltms.bridged.config;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * CB-559: re-reading {@code bridged.yaml} under a running daemon.
+ *
+ * <p>The tests that matter here are the refusals. A reload that applies a good file is the easy
+ * half; the half that protects an operator is the one that keeps the running config when the new
+ * file is bad, and the one that refuses a change the running daemon cannot honour.
+ */
+class ConfigRefTest {
+
+    /** A minimal file that loads and passes every startup validator. */
+    private static String yaml(String extra) {
+        return """
+                bind:
+                  host: 127.0.0.1
+                  port: 8765
+                herdrSocket: ~/.config/herdr/herdr.sock
+                profiles:
+                  sonnet:
+                    baseUrl: http://gx00.gw:8000
+                    model: sonnet
+                guard:
+                  offSubscriptionHosts:
+                    - gx00.gw
+                """ + extra;
+    }
+
+    private static ConfigRef refFor(Path f) {
+        return new ConfigRef(f, BridgedConfig.load(f));
+    }
+
+    @Test
+    void aHotChangeIsAppliedAndReadThroughGet(@TempDir Path dir) throws Exception {
+        Path f = dir.resolve("bridged.yaml");
+        Files.writeString(f, yaml("""
+                fleet:
+                  tabLabel: "{role}: {profile} #{n}"
+                  developers:
+                    a:
+                      profile: sonnet
+                """));
+        ConfigRef ref = refFor(f);
+        assertEquals("{role}: {profile} #{n}", ref.get().fleet().tabLabel());
+
+        Files.writeString(f, yaml("""
+                fleet:
+                  tabLabel: "[{profile}] {role}"
+                  developers:
+                    a:
+                      profile: sonnet
+                """));
+        ConfigRef.Outcome out = ref.reload();
+
+        assertTrue(out.applied());
+        assertTrue(out.deferred().isEmpty());
+        assertEquals("config reloaded", out.summary());
+        assertEquals("[{profile}] {role}", ref.get().fleet().tabLabel());
+    }
+
+    @Test
+    void aCharterChangeIsHotAndReachesTheLiveConfig(@TempDir Path dir) throws Exception {
+        Path f = dir.resolve("bridged.yaml");
+        Files.writeString(f, yaml("""
+                fleet:
+                  charters:
+                    architect: old charter
+                """));
+        ConfigRef ref = refFor(f);
+        assertEquals("old charter", ref.get().fleet().charterFor(
+                dev.ltms.bridged.peer.MemberRole.ARCHITECT));
+
+        Files.writeString(f, yaml("""
+                fleet:
+                  charters:
+                    architect: new charter
+                """));
+        ConfigRef.Outcome out = ref.reload();
+
+        assertTrue(out.applied());
+        assertTrue(out.deferred().isEmpty());
+        assertEquals("new charter", ref.get().fleet().charterFor(
+                dev.ltms.bridged.peer.MemberRole.ARCHITECT));
+    }
+
+    @Test
+    void invalidChartersRefuseReloadAndKeepTheRunningConfig(@TempDir Path dir) throws Exception {
+        Path f = dir.resolve("bridged.yaml");
+        Files.writeString(f, yaml("""
+                fleet:
+                  charters:
+                    architect: valid charter
+                """));
+        ConfigRef ref = refFor(f);
+        BridgedConfig before = ref.get();
+
+        Files.writeString(f, yaml("""
+                fleet:
+                  charters:
+                    architect: " "
+                """));
+        ConfigRef.Outcome blank = ref.reload();
+        assertFalse(blank.applied());
+        assertTrue(blank.error().contains("fleet.charters.architect is blank"));
+        assertSame(before, ref.get());
+
+        Files.writeString(f, yaml("""
+                fleet:
+                  charters:
+                    architetc: valid charter
+                """));
+        ConfigRef.Outcome unknown = ref.reload();
+        assertFalse(unknown.applied());
+        assertTrue(unknown.error().contains("architetc"));
+        assertTrue(unknown.error().contains("architect"));
+        assertSame(before, ref.get());
+    }
+
+    /**
+     * The point of the whole class: a consumer holding the ref sees the new value without being
+     * rebuilt. A component that captured {@code get()} into a field would still show the old one.
+     */
+    @Test
+    void aConsumerHoldingTheRefSeesTheNewValue(@TempDir Path dir) throws Exception {
+        Path f = dir.resolve("bridged.yaml");
+        Files.writeString(f, yaml("placement: weighted\n"));
+        ConfigRef ref = refFor(f);
+        java.util.function.Supplier<String> reader = () -> ref.get().placement();
+        assertEquals("weighted", reader.get());
+
+        Files.writeString(f, yaml("placement: fixed\n"));
+        assertTrue(ref.reload().applied());
+
+        assertEquals("fixed", reader.get());
+    }
+
+    @Test
+    void aChangedColdKeyRefusesTheWholeReload(@TempDir Path dir) throws Exception {
+        Path f = dir.resolve("bridged.yaml");
+        Files.writeString(f, yaml("placement: weighted\n"));
+        ConfigRef ref = refFor(f);
+
+        // Two changes in one file: a cold one (the port) and a hot one (placement).
+        Files.writeString(f, yaml("placement: fixed\n").replace("port: 8765", "port: 9999"));
+        ConfigRef.Outcome out = ref.reload();
+
+        assertFalse(out.applied());
+        assertEquals(java.util.List.of("bind"), out.coldKeys());
+        assertTrue(out.summary().contains("Restart bridged"), out.summary());
+        // The hot half must NOT have leaked in. A half-applied reload leaves the daemon matching no
+        // file on disk, which is worse for an operator than no reload at all.
+        assertEquals("weighted", ref.get().placement());
+        assertEquals(8765, ref.get().bind().port());
+    }
+
+    @Test
+    void aFileThatNoLongerParsesKeepsTheRunningConfig(@TempDir Path dir) throws Exception {
+        Path f = dir.resolve("bridged.yaml");
+        Files.writeString(f, yaml("placement: weighted\n"));
+        ConfigRef ref = refFor(f);
+        BridgedConfig before = ref.get();
+
+        Files.writeString(f, "profiles:\n  sonnet:\n   baseUrl: \"unclosed\n");
+        ConfigRef.Outcome out = ref.reload();
+
+        assertFalse(out.applied());
+        assertNotNull(out.error());
+        assertTrue(out.summary().startsWith("config reload refused"), out.summary());
+        assertSame(before, ref.get());
+    }
+
+    /** A file that would have refused to boot must not be able to slip in through a reload. */
+    @Test
+    void aFileThatFailsAValidatorKeepsTheRunningConfig(@TempDir Path dir) throws Exception {
+        Path f = dir.resolve("bridged.yaml");
+        Files.writeString(f, yaml("placement: weighted\n"));
+        ConfigRef ref = refFor(f);
+        BridgedConfig before = ref.get();
+
+        // A member slot naming a profile that does not exist — validateMembers refuses this at
+        // startup, so it must refuse it here too.
+        Files.writeString(f, yaml("""
+                fleet:
+                  developers:
+                    a:
+                      profile: no-such-profile
+                """));
+        ConfigRef.Outcome out = ref.reload();
+
+        assertFalse(out.applied());
+        assertNotNull(out.error());
+        assertSame(before, ref.get());
+    }
+
+    @Test
+    void aDeletedFileIsRefusedRatherThanCrashing(@TempDir Path dir) throws Exception {
+        Path f = dir.resolve("bridged.yaml");
+        Files.writeString(f, yaml(""));
+        ConfigRef ref = refFor(f);
+        BridgedConfig before = ref.get();
+
+        Files.delete(f);
+        ConfigRef.Outcome out = ref.reload();
+
+        assertFalse(out.applied());
+        assertNotNull(out.error());
+        assertSame(before, ref.get());
+    }
+
+    /** A deferred change applies to the snapshot but the operator is told it needs a restart. */
+    @Test
+    void aDeferredChangeIsAppliedAndReported(@TempDir Path dir) throws Exception {
+        Path f = dir.resolve("bridged.yaml");
+        Files.writeString(f, yaml("""
+                lifecycle:
+                  drainTimeoutSeconds: 30
+                """));
+        ConfigRef ref = refFor(f);
+
+        Files.writeString(f, yaml("""
+                lifecycle:
+                  drainTimeoutSeconds: 60
+                """));
+        ConfigRef.Outcome out = ref.reload();
+
+        assertTrue(out.applied());
+        assertEquals(java.util.List.of("lifecycle"), out.deferred());
+        assertTrue(out.summary().contains("needs a restart") || out.summary().contains("need a restart"),
+                out.summary());
+        assertEquals(60, ref.get().lifecycle().drainTimeoutSeconds());
+    }
+
+    /**
+     * Adding a profile is deferred, not hot: a new backend needs its own launcher, and launchers are
+     * built once at startup. The snapshot carries it so a restart picks it up.
+     */
+    @Test
+    void addingAProfileIsReportedAsDeferred(@TempDir Path dir) throws Exception {
+        Path f = dir.resolve("bridged.yaml");
+        Files.writeString(f, yaml(""));
+        ConfigRef ref = refFor(f);
+
+        Files.writeString(f, """
+                bind:
+                  host: 127.0.0.1
+                  port: 8765
+                herdrSocket: ~/.config/herdr/herdr.sock
+                profiles:
+                  sonnet:
+                    baseUrl: http://gx00.gw:8000
+                    model: sonnet
+                  haiku:
+                    baseUrl: http://gx00.gw:8000
+                    model: haiku
+                guard:
+                  offSubscriptionHosts:
+                    - gx00.gw
+                """);
+        ConfigRef.Outcome out = ref.reload();
+
+        assertTrue(out.applied());
+        assertEquals(1, out.deferred().size());
+        assertTrue(out.deferred().getFirst().contains("haiku"), out.deferred().toString());
+    }
+
+    /**
+     * Changing an existing profile's weight or maxLoad IS hot: placement reads those live through
+     * the supplier on the composite, so the next spawn already sees them.
+     */
+    @Test
+    void changingAProfilesWeightOrMaxLoadIsHot(@TempDir Path dir) throws Exception {
+        Path f = dir.resolve("bridged.yaml");
+        Files.writeString(f, yaml(""));
+        ConfigRef ref = refFor(f);
+
+        Files.writeString(f, """
+                bind:
+                  host: 127.0.0.1
+                  port: 8765
+                herdrSocket: ~/.config/herdr/herdr.sock
+                profiles:
+                  sonnet:
+                    baseUrl: http://gx00.gw:8000
+                    model: sonnet
+                    maxLoad: 7
+                    weight: 3.0
+                guard:
+                  offSubscriptionHosts:
+                    - gx00.gw
+                """);
+        ConfigRef.Outcome out = ref.reload();
+
+        assertTrue(out.applied());
+        assertTrue(out.deferred().isEmpty(), out.deferred().toString());
+        assertEquals(7, ref.get().profiles().get("sonnet").maxLoad());
+    }
+
+    /**
+     * Changing an existing profile's MODEL is deferred, not hot — and saying so is the whole point.
+     * HerdrPeerLauncher takes Map.copyOf(profiles) at construction and resolves every spawn out of
+     * that copy, so a reloaded model never reaches a launch. Reporting it as applied would be the
+     * worst outcome a reload can produce: the operator has no reason to doubt a clean "reloaded".
+     */
+    @Test
+    void changingAProfilesLaunchSettingsIsReportedAsDeferred(@TempDir Path dir) throws Exception {
+        Path f = dir.resolve("bridged.yaml");
+        Files.writeString(f, yaml(""));
+        ConfigRef ref = refFor(f);
+
+        Files.writeString(f, """
+                bind:
+                  host: 127.0.0.1
+                  port: 8765
+                herdrSocket: ~/.config/herdr/herdr.sock
+                profiles:
+                  sonnet:
+                    baseUrl: http://gx00.gw:8000
+                    model: deepseek-v4-flash
+                guard:
+                  offSubscriptionHosts:
+                    - gx00.gw
+                """);
+        ConfigRef.Outcome out = ref.reload();
+
+        assertTrue(out.applied());
+        assertEquals(1, out.deferred().size(), out.deferred().toString());
+        assertTrue(out.deferred().getFirst().contains("sonnet"), out.deferred().toString());
+        assertTrue(out.deferred().getFirst().contains("launch settings"), out.deferred().toString());
+        // The snapshot still carries the new value — a restart is what makes it take effect.
+        assertEquals("deepseek-v4-flash", ref.get().profiles().get("sonnet").model());
+    }
+
+    @Test
+    void aFixedRefHasNoFileAndRefusesToReload() {
+        BridgedConfig cfg = new BridgedConfig(null, null, null, null, null, null,
+                null, null, null, null, null, null, null, null, null).withDefaults();
+        ConfigRef ref = ConfigRef.fixed(cfg);
+
+        assertNull(ref.path());
+        assertSame(cfg, ref.get());
+        ConfigRef.Outcome out = ref.reload();
+        assertFalse(out.applied());
+        assertNotNull(out.error());
+    }
+}

bridged/src/test/java/dev/ltms/bridged/config/ConfigWatcherTest.java

@@ -0,0 +1,162 @@
+package dev.ltms.bridged.config;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.attribute.FileTime;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * CB-559: the mtime poller behind {@code configReload:}. The tests drive {@link
+ * ConfigWatcher#tick()} directly rather than the scheduler, so nothing here sleeps.
+ */
+class ConfigWatcherTest {
+
+    private static String yaml(String placement) {
+        return """
+                bind:
+                  host: 127.0.0.1
+                  port: 8765
+                herdrSocket: ~/.config/herdr/herdr.sock
+                profiles:
+                  sonnet:
+                    baseUrl: http://gx00.gw:8000
+                    model: sonnet
+                guard:
+                  offSubscriptionHosts:
+                    - gx00.gw
+                """ + "placement: " + placement + "\n";
+    }
+
+    /** Write and stamp an mtime, so a test never depends on the filesystem's clock resolution. */
+    private static void write(Path f, String content, long millis) throws Exception {
+        Files.writeString(f, content);
+        Files.setLastModifiedTime(f, FileTime.fromMillis(millis));
+    }
+
+    @Test
+    void aChangedMtimeTriggersAReload(@TempDir Path dir) throws Exception {
+        Path f = dir.resolve("bridged.yaml");
+        write(f, yaml("weighted"), 1_000L);
+        ConfigRef ref = new ConfigRef(f, BridgedConfig.load(f));
+
+        ConfigWatcher watcher = new ConfigWatcher(ref, 10);
+        try {
+            write(f, yaml("fixed"), 2_000L);
+            watcher.tick();
+
+            assertEquals("fixed", ref.get().placement());
+        } finally {
+            watcher.stop();
+        }
+    }
+
+    @Test
+    void anUnchangedFileIsNotReloaded(@TempDir Path dir) throws Exception {
+        Path f = dir.resolve("bridged.yaml");
+        write(f, yaml("weighted"), 1_000L);
+        ConfigRef ref = new ConfigRef(f, BridgedConfig.load(f));
+        BridgedConfig before = ref.get();
+
+        ConfigWatcher watcher = new ConfigWatcher(ref, 10);
+        try {
+            watcher.tick();
+            watcher.tick();
+
+            // Same instance, so no reload happened — a reload always swaps in a fresh object.
+            assertSame(before, ref.get());
+        } finally {
+            watcher.stop();
+        }
+    }
+
+    /**
+     * A refused reload must not be retried every tick. Without the stamp-before-reload order the
+     * same refusal would be logged forever, which buries the log an operator needs.
+     */
+    @Test
+    void aRefusedReloadIsNotRetriedUntilTheFileChangesAgain(@TempDir Path dir) throws Exception {
+        Path f = dir.resolve("bridged.yaml");
+        write(f, yaml("weighted"), 1_000L);
+        ConfigRef ref = new ConfigRef(f, BridgedConfig.load(f));
+        BridgedConfig before = ref.get();
+
+        ConfigWatcher watcher = new ConfigWatcher(ref, 10);
+        try {
+            // A cold change: refused, and the running config stays.
+            write(f, yaml("fixed").replace("port: 8765", "port: 9999"), 2_000L);
+            watcher.tick();
+            assertSame(before, ref.get());
+
+            // The next tick sees the same mtime, so it does nothing at all.
+            watcher.tick();
+            assertSame(before, ref.get());
+
+            // A fresh save earns a fresh attempt — and this one is hot, so it applies.
+            write(f, yaml("fixed"), 3_000L);
+            watcher.tick();
+            assertEquals("fixed", ref.get().placement());
+        } finally {
+            watcher.stop();
+        }
+    }
+
+    /**
+     * Editors briefly unlink the file mid-save. A missing file is skipped, not an error and not a
+     * reload — the running config stays live, which is right either way.
+     */
+    @Test
+    void aMissingFileIsSkippedAndTheNextTickTriesAgain(@TempDir Path dir) throws Exception {
+        Path f = dir.resolve("bridged.yaml");
+        write(f, yaml("weighted"), 1_000L);
+        ConfigRef ref = new ConfigRef(f, BridgedConfig.load(f));
+        BridgedConfig before = ref.get();
+
+        ConfigWatcher watcher = new ConfigWatcher(ref, 10);
+        try {
+            Files.delete(f);
+            assertDoesNotThrow(watcher::tick);
+            assertSame(before, ref.get());
+
+            write(f, yaml("fixed"), 2_000L);
+            watcher.tick();
+            assertEquals("fixed", ref.get().placement());
+        } finally {
+            watcher.stop();
+        }
+    }
+
+    /** A ref with no file behind it must not start a scheduler that could never do anything. */
+    @Test
+    void aFixedRefStartsNoWatch() {
+        BridgedConfig cfg = new BridgedConfig(null, null, null, null, null, null,
+                null, null, null, null, null, null, null, null, null).withDefaults();
+        ConfigWatcher watcher = new ConfigWatcher(ConfigRef.fixed(cfg), 10);
+        try {
+            assertDoesNotThrow(watcher::start);
+            assertDoesNotThrow(watcher::tick);
+        } finally {
+            watcher.stop();
+        }
+    }
+
+    @Test
+    void configReloadIsOffUnlessTheBlockSaysOtherwise(@TempDir Path dir) throws Exception {
+        Path f = dir.resolve("bridged.yaml");
+        write(f, yaml("weighted"), 1_000L);
+        assertNull(BridgedConfig.load(f).configReload());
+
+        write(f, yaml("weighted") + "configReload:\n  enabled: true\n", 2_000L);
+        BridgedConfig.ConfigReload on = BridgedConfig.load(f).configReload();
+        assertTrue(on.isEnabled());
+        assertEquals(10, on.intervalSeconds(), "an absent interval defaults to 10s");
+
+        write(f, yaml("weighted") + "configReload:\n  intervalSeconds: 30\n", 3_000L);
+        BridgedConfig.ConfigReload off = BridgedConfig.load(f).configReload();
+        assertFalse(off.isEnabled(), "a block that only sets the interval does not enable the watch");
+        assertEquals(30, off.intervalSeconds());
+    }
+}

bridged/src/test/java/dev/ltms/bridged/herdr/AgentControlContractTest.java

@@ -11,10 +11,11 @@ import static org.junit.jupiter.api.Assertions.*;
 import static org.junit.jupiter.api.Assumptions.assumeTrue;
 
 /**
- * Contract test for the {@code agent.*} south side against a REAL herdr, locking in
- * the CB-102 spike findings. It spawns a HARMLESS probe command (never {@code claude},
- * so no subscription/token involvement), proves the {@code env} map reaches the process
- * environment, exercises status/read, and always tears the pane down.
+ * Contract test for the worker env seam against a REAL herdr. Under protocol 19 (CB-521) the
+ * env map is injected at PANE CREATION ({@code tab.create}), not {@code agent.start} — and
+ * {@code agent.start} now only launches supported agent kinds, so this probes the seed pane's
+ * SHELL directly (never {@code claude}, so no subscription/token involvement) and always tears
+ * the throwaway space down.
  *
  * <p>Tagged {@code contract}; run with {@code mvn test -Pcontract}.
  */
@@ -26,38 +27,30 @@ class AgentControlContractTest {
     }
 
     @Test
-    void startInjectsEnvThenReadAndClose() throws Exception {
+    void tabCreateInjectsEnvIntoTheSeedShell() throws Exception {
         assumeTrue(!noSocket(), "no herdr socket — skipping");
         try (UnixSocketHerdrClient herdr = UnixSocketHerdrClient.connect()) {
-            AgentControl agents = new AgentControl(herdr);
-
-            Agent probe = agents.start(
-                    "__contract__",
-                    List.of("bash", "-c", "printf 'PROBE_BASE=[%s]\\n' \"$ANTHROPIC_BASE_URL\"; sleep 20"),
+            WorkspaceControl spaces = new WorkspaceControl(herdr);
+            Workspace space = spaces.ensureWorkspace("__bridged_env_contract__");
+            Tab.Created tab = spaces.createTab(space.workspaceId(), null,
                     Map.of("ANTHROPIC_BASE_URL", "http://gx00.gw:8000"));
-
-            assertNotNull(probe.terminalId());
-            assertNotNull(probe.paneId());
             try {
-                // Give the shell a moment to print, then confirm env reached the process.
+                assertNotNull(tab.rootPaneId(), "tab.create must return the seed pane");
+                Thread.sleep(1000); // let the seed shell reach its prompt
+                herdr.call("pane.send_input", Map.of(
+                        "pane_id", tab.rootPaneId(),
+                        "text", "printf 'PROBE_BASE=[%s]\\n' \"$ANTHROPIC_BASE_URL\"",
+                        "keys", List.of("enter")));
                 Thread.sleep(800);
-                String visible = agents.read(probe.terminalId(), "visible");
+                String visible = herdr.call("pane.read",
+                                Map.of("pane_id", tab.rootPaneId(), "source", "visible"))
+                        .path("read").path("text").asText("");
                 assertTrue(visible.contains("PROBE_BASE=[http://gx00.gw:8000]"),
-                        "env map must reach the process; saw: " + visible);
-
-                // Status is queryable; the probe appears in the agent list.
-                assertNotNull(agents.status(probe.terminalId()));
-                assertTrue(agents.list().stream()
-                                .anyMatch(a -> probe.terminalId().equals(a.terminalId())),
-                        "spawned probe should appear in agent.list");
+                        "env map must reach the seed shell; saw: " + visible);
             } finally {
-                agents.close(probe.paneId());
+                spaces.closeTab(tab.tab().tabId());
+                herdr.call("workspace.close", Map.of("workspace_id", space.workspaceId()));
             }
-
-            // After close the pane is gone.
-            assertFalse(agents.list().stream()
-                            .anyMatch(a -> probe.terminalId().equals(a.terminalId())),
-                    "closed probe should no longer be listed");
         }
     }
 }

bridged/src/test/java/dev/ltms/bridged/herdr/AgentControlTest.java

@@ -0,0 +1,74 @@
+package dev.ltms.bridged.herdr;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+/** Unit-level behaviour of {@link AgentControl} over a fake herdr (protocol 19). */
+class AgentControlTest {
+
+    /** The {@code text} of every agent.prompt, in call order. */
+    @SuppressWarnings("unchecked")
+    private static List<String> promptTexts(FakeHerdr herdr) {
+        return herdr.calls.stream()
+                .filter(c -> c.method().equals("agent.prompt"))
+                .map(c -> ((Map<String, Object>) c.params()).get("text").toString())
+                .toList();
+    }
+
+    @Test
+    void sendDeliversThePayloadAsOnePromptThatSubmitsItself() {
+        FakeHerdr herdr = new FakeHerdr();
+        new AgentControl(herdr).send("term_x", "do the thing");
+
+        // agent.prompt pastes AND submits in one call — no separate Enter event to assert.
+        assertEquals(List.of("do the thing"), promptTexts(herdr),
+                "exactly one agent.prompt carrying the payload");
+    }
+
+    @Test
+    void sendPreservesEmbeddedNewlinesVerbatim() {
+        FakeHerdr herdr = new FakeHerdr();
+        new AgentControl(herdr).send("term_x", "line1\nline2");
+
+        assertEquals(List.of("line1\nline2"), promptTexts(herdr),
+                "multiline content is delivered verbatim in the single prompt");
+    }
+
+    @Test
+    void submitNudgesWithAStandaloneEnterKeystroke() {
+        FakeHerdr herdr = new FakeHerdr();
+        new AgentControl(herdr).submit("term_x");
+
+        FakeHerdr.Call keys = herdr.lastCall("agent.send_keys");
+        assertEquals(Map.of("target", "term_x", "keys", List.of("enter")), keys.params(),
+                "the raced-Enter nudge is a raw send_keys, not a second prompt");
+    }
+
+    @Test
+    @SuppressWarnings("unchecked")
+    void aTerminalIdTargetIsTranslatedToItsPaneId() {
+        // Protocol 19 rejects terminal_id as an agent.* target; the fake's agent.list maps
+        // term_a to pane w2:p7, and the control layer must address herdr by that pane.
+        FakeHerdr herdr = new FakeHerdr();
+        new AgentControl(herdr).send("term_a", "hello");
+
+        Map<String, Object> prompt = (Map<String, Object>) herdr.lastCall("agent.prompt").params();
+        assertEquals("w2:p7", prompt.get("target"), "terminal target resolved to the agent's pane id");
+    }
+
+    @Test
+    @SuppressWarnings("unchecked")
+    void theTerminalToPaneMappingIsCachedAcrossCalls() {
+        FakeHerdr herdr = new FakeHerdr();
+        AgentControl agents = new AgentControl(herdr);
+        agents.send("term_a", "one");
+        agents.send("term_a", "two");
+
+        long lists = herdr.calls.stream().filter(c -> c.method().equals("agent.list")).count();
+        assertEquals(1, lists, "one agent.list resolution serves every later call to the same terminal");
+    }
+}

bridged/src/test/java/dev/ltms/bridged/herdr/AgentStatusTest.java

@@ -0,0 +1,43 @@
+package dev.ltms.bridged.herdr;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/** Wire mapping and injectability of {@link AgentStatus}, including the CB-115 {@code done} state. */
+class AgentStatusTest {
+
+    @Test
+    void mapsTheKnownWireStrings() {
+        assertEquals(AgentStatus.IDLE, AgentStatus.fromWire("idle"));
+        assertEquals(AgentStatus.WORKING, AgentStatus.fromWire("working"));
+        assertEquals(AgentStatus.BLOCKED, AgentStatus.fromWire("blocked"));
+        assertEquals(AgentStatus.DONE, AgentStatus.fromWire("done"));
+    }
+
+    @Test
+    void mapsDoneCaseInsensitively() {
+        assertEquals(AgentStatus.DONE, AgentStatus.fromWire("DONE"));
+        assertEquals(AgentStatus.DONE, AgentStatus.fromWire("Done"));
+    }
+
+    @Test
+    void unknownAndNullFallToUnknown() {
+        assertEquals(AgentStatus.UNKNOWN, AgentStatus.fromWire("unknown"));
+        assertEquals(AgentStatus.UNKNOWN, AgentStatus.fromWire("something-else"));
+        assertEquals(AgentStatus.UNKNOWN, AgentStatus.fromWire(null));
+    }
+
+    @Test
+    void doneIsInjectableLikeIdle() {
+        // The whole point of CB-115: a finished worker herdr reports as `done` must be deliverable,
+        // not treated as UNKNOWN (which wedged delivery and mis-fired the stall failure).
+        assertTrue(AgentStatus.DONE.injectable());
+        assertTrue(AgentStatus.IDLE.injectable());
+        assertTrue(AgentStatus.BLOCKED.injectable());
+        assertFalse(AgentStatus.WORKING.injectable());
+        assertFalse(AgentStatus.UNKNOWN.injectable());
+    }
+}

bridged/src/test/java/dev/ltms/bridged/herdr/FakeHerdr.java

@@ -4,27 +4,40 @@ import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 
 import java.util.ArrayList;
+import java.util.LinkedHashMap;
 import java.util.List;
+import java.util.Map;
 
 /**
  * Recording fake {@link HerdrClient} for unit/acceptance tests. Returns canned frames
- * captured from the real herdr 0.7.0 daemon and records every call so tests can assert
- * both behaviour and that guard-blocked paths never reached herdr.
+ * matching the real herdr 0.8.0 daemon (protocol 19) and records every call so tests can
+ * assert both behaviour and that guard-blocked paths never reached herdr.
  */
 public final class FakeHerdr implements HerdrClient {
 
     public record Call(String method, Object params) {
     }
 
+    /** The foreground PID of the one agent pane (term_a) in the canned {@code pane.process_info}. */
+    public static final long WORKER_PID = 4242;
+
     private final ObjectMapper mapper = new ObjectMapper();
     public final List<Call> calls = new ArrayList<>();
     private boolean healthy = true;
     private final List<String> extraWorkspaces = new ArrayList<>();
+    private final List<String> extraAgents = new ArrayList<>();
+    /** workspaceId → extra tabs that {@code tab.list} reports for it (CB-558 lead scans). */
+    private final Map<String, List<String>> extraTabs = new LinkedHashMap<>();
     private int agentNameTakenFor = 0;
+    private int agentPaneBusyFor = 0;
     private int workerTabPaneCount = 1;
     private String paneCloseErrorCode = null;
     private String agentSendErrorCode = null;
-    private volatile String agentStatus = "idle"; // what agent.get reports
+    private volatile String agentStatus = "idle"; // steady-state agent.get status
+    private volatile String readText = "worker transcript tail"; // canned agent.read output
+    private int pinnedStarts = 0;   // how many upcoming agent.start calls report a fixed pane
+    private String pinnedStartTerminal;
+    private String pinnedStartPane;
 
     public FakeHerdr healthy(boolean h) {
         this.healthy = h;
@@ -37,6 +50,12 @@ public final class FakeHerdr implements HerdrClient {
         return this;
     }
 
+    /** Reject the first {@code n} {@code agent.start} calls with {@code agent_pane_busy}. */
+    public FakeHerdr agentPaneBusyTimes(int n) {
+        this.agentPaneBusyFor = n;
+        return this;
+    }
+
     /** Make the worker tab (w9:t2) report this many panes in {@code tab.list} (default 1). */
     public FakeHerdr withWorkerTabPaneCount(int n) {
         this.workerTabPaneCount = n;
@@ -55,12 +74,57 @@ public final class FakeHerdr implements HerdrClient {
         return this;
     }
 
-    /** Make {@code agent.send} fail with this herdr error code. */
+    /** The text {@code agent.read} returns (the CB-106 completion scrape). */
+    public FakeHerdr readText(String text) {
+        this.readText = text;
+        return this;
+    }
+
+    /** Make delivery ({@code agent.prompt} / {@code agent.send_keys}) fail with this error code. */
     public FakeHerdr agentSendFailsWith(String code) {
         this.agentSendErrorCode = code;
         return this;
     }
 
+    /**
+     * Force the next {@code n} {@code agent.start} calls to report this terminal/pane coordinate,
+     * instead of the fake's usual incrementing {@code term_new_n}/{@code w9:pRoot_n}. Lets a test make
+     * two spawns report the <em>same</em> herdr pane, to prove the host-unique id (CB-519) never
+     * collides on that coordinate.
+     */
+    public FakeHerdr pinNextStarts(int n, String terminalId, String paneId) {
+        this.pinnedStarts = n;
+        this.pinnedStartTerminal = terminalId;
+        this.pinnedStartPane = paneId;
+        return this;
+    }
+
+
+    /**
+     * Seed a named agent into {@code agent.list} (e.g. an orphaned worker for CB-117 reaper tests).
+     * The {@code name} carries the worker label the reaper keys on; {@code paneId}/{@code tabId}
+     * locate its pane for teardown.
+     */
+    public FakeHerdr withAgent(String name, String terminalId, String paneId, String tabId) {
+        extraAgents.add(("{\"terminal_id\":\"%s\",\"agent\":\"claude\",\"agent_status\":\"idle\","
+                + "\"name\":\"%s\",\"agent_session\":{\"kind\":\"id\",\"value\":\"sess-%s\"},"
+                + "\"workspace_id\":\"wQ\",\"tab_id\":\"%s\",\"pane_id\":\"%s\"}")
+                .formatted(terminalId, name, terminalId, tabId, paneId));
+        return this;
+    }
+
+    /**
+     * Seed a labelled tab into {@code tab.list} for one workspace (e.g. an existing {@code lead: x}
+     * tab). Pair it with {@link #withAgent} on the same {@code tabId} to make the lead <em>live</em>;
+     * seeding the tab alone models the stale-label case.
+     */
+    public FakeHerdr withTab(String workspaceId, String tabId, String label) {
+        extraTabs.computeIfAbsent(workspaceId, _ -> new ArrayList<>())
+                .add(("{\"tab_id\":\"%s\",\"workspace_id\":\"%s\",\"label\":\"%s\",\"pane_count\":1}")
+                        .formatted(tabId, workspaceId, label));
+        return this;
+    }
+
     /** Seed an additional workspace into {@code workspace.list} (e.g. a pre-existing worker space). */
     public FakeHerdr withWorkspace(String id, String label) {
         extraWorkspaces.add(("{\"workspace_id\":\"%s\",\"label\":\"%s\",\"focused\":false,"
@@ -85,20 +149,31 @@ public final class FakeHerdr implements HerdrClient {
         try {
             return switch (method) {
                 case "ping" -> mapper.readTree(
-                        "{\"type\":\"pong\",\"version\":\"0.7.0\",\"protocol\":14}");
+                        "{\"type\":\"pong\",\"version\":\"0.8.0\",\"protocol\":19}");
                 case "workspace.list" -> mapper.readTree(("""
                         {"type":"workspace_list","workspaces":[
                           {"workspace_id":"w1","label":"dev-mgnl","focused":true,"pane_count":7,"agent_status":"unknown"},
                           {"workspace_id":"w2","label":"ltms","focused":false,"pane_count":5,"agent_status":"done"}%s]}""")
                         .formatted(extraWorkspaces.isEmpty() ? "" : "," + String.join(",", extraWorkspaces)));
-                case "agent.list" -> mapper.readTree("""
+                case "agent.list" -> mapper.readTree(("""
                         {"type":"agent_list","agents":[
                           {"terminal_id":"term_a","agent":"claude","agent_status":"idle",
                            "agent_session":{"kind":"id","value":"sess-1111"},
-                           "workspace_id":"w2","tab_id":"w2:t7","pane_id":"w2:p7"}]}""");
-                case "agent.send" -> {
+                           "workspace_id":"w2","tab_id":"w2:t7","pane_id":"w2:p7"}%s]}""")
+                        .formatted(extraAgents.isEmpty() ? "" : "," + String.join(",", extraAgents)));
+                case "agent.prompt" -> {
                     if (agentSendErrorCode != null) {
-                        throw new HerdrException("herdr error [" + agentSendErrorCode + "]: agent.send failed",
+                        throw new HerdrException("herdr error [" + agentSendErrorCode + "]: agent.prompt failed",
+                                agentSendErrorCode, null);
+                    }
+                    yield mapper.readTree(("""
+                        {"type":"agent_prompted","agent":{"terminal_id":"term_a","agent":"claude",
+                          "agent_status":"%s","workspace_id":"w2","tab_id":"w2:t7","pane_id":"w2:p7"}}""")
+                            .formatted(agentStatus));
+                }
+                case "agent.send_keys" -> {
+                    if (agentSendErrorCode != null) {
+                        throw new HerdrException("herdr error [" + agentSendErrorCode + "]: agent.send_keys failed",
                                 agentSendErrorCode, null);
                     }
                     yield mapper.readTree("{\"type\":\"ok\"}");
@@ -107,40 +182,100 @@ public final class FakeHerdr implements HerdrClient {
                         {"type":"agent_info","agent":{"terminal_id":"term_a","agent":"claude",
                           "agent_status":"%s","workspace_id":"w2","tab_id":"w2:t7","pane_id":"w2:p7"}}""")
                         .formatted(agentStatus));
+                case "agent.read" -> mapper.readTree(mapper.writeValueAsString(
+                        java.util.Map.of("type", "agent_read", "read", java.util.Map.of("text", readText))));
                 case "agent.start" -> {
+                    // Protocol 19: kind and pane_id are required — reject like the real daemon.
+                    java.util.Map<?, ?> p = params instanceof java.util.Map<?, ?> m ? m : java.util.Map.of();
+                    for (String required : new String[]{"kind", "pane_id"}) {
+                        if (p.get(required) == null) {
+                            throw new HerdrException(
+                                    "herdr error [invalid_request]: invalid request: missing field `"
+                                            + required + "`", "invalid_request", null);
+                        }
+                    }
                     long starts = calls.stream().filter(c -> c.method().equals("agent.start")).count();
-                    if (starts <= agentNameTakenFor) {
+                    if (starts <= agentPaneBusyFor) {
+                        throw new HerdrException(
+                                "herdr error [agent_pane_busy]: agent target pane is not an available shell",
+                                "agent_pane_busy", null);
+                    }
+                    long busyAdjusted = starts - agentPaneBusyFor;
+                    if (busyAdjusted <= agentNameTakenFor) {
                         throw new HerdrException(
                                 "herdr error [agent_name_taken]: agent name already used",
                                 "agent_name_taken", null);
                     }
-                    yield mapper.readTree("""
+                    long n = busyAdjusted - agentNameTakenFor;
+                    boolean pinned = pinnedStarts > 0;
+                    if (pinned) {
+                        pinnedStarts--;
+                    }
+                    // Protocol 19: the agent starts INTO the requested pane, so its pane_id normally
+                    // echoes the param. A pin overrides both coordinates, which is the only way to
+                    // make two spawns report one pane — what CB-519's collision test needs.
+                    String terminal = pinned ? pinnedStartTerminal : ("term_new_" + n);
+                    Object pane = pinned ? pinnedStartPane : p.get("pane_id");
+                    yield mapper.readTree(("""
                         {"type":"agent_started","agent":{
-                          "terminal_id":"term_new","name":"claude","agent_status":"unknown",
-                          "workspace_id":"w9","tab_id":"w9:t2","pane_id":"w9:pW"}}""");
+                          "terminal_id":"%s","name":"claude","agent_status":"unknown",
+                          "workspace_id":"w9","tab_id":"w9:t2","pane_id":"%s"}}""")
+                            .formatted(terminal, pane));
                 }
+                case "pane.split" -> mapper.readTree("""
+                        {"type":"pane_info","pane":{"pane_id":"w1:pSplit","workspace_id":"w1",
+                          "tab_id":"w1:t1"}}""");
                 case "workspace.create" -> mapper.readTree("""
                         {"type":"workspace_created",
                          "workspace":{"workspace_id":"w9","label":"bridged-workers","focused":false,
                            "pane_count":1,"tab_count":1,"active_tab_id":"w9:t1","agent_status":"unknown"},
                          "tab":{"tab_id":"w9:t1","workspace_id":"w9","label":"1","pane_count":1},
                          "root_pane":{"pane_id":"w9:p1","workspace_id":"w9","tab_id":"w9:t1"}}""");
-                case "tab.create" -> mapper.readTree("""
+                case "tab.create" -> {
+                    // Each tab gets its own seed pane — under protocol 19 that pane becomes the
+                    // worker pane, so distinct spawns must yield distinct pane ids.
+                    long tabs = calls.stream().filter(c -> c.method().equals("tab.create")).count();
+                    yield mapper.readTree(("""
                         {"type":"tab_created",
                          "tab":{"tab_id":"w9:t2","workspace_id":"w9","label":"2","pane_count":1},
-                         "root_pane":{"pane_id":"w9:pRoot","workspace_id":"w9","tab_id":"w9:t2"}}""");
+                         "root_pane":{"pane_id":"w9:pRoot_%d","workspace_id":"w9","tab_id":"w9:t2"}}""")
+                            .formatted(tabs));
+                }
                 case "tab.rename" -> mapper.readTree("""
                         {"type":"tab_info","tab":{"tab_id":"w9:t2","workspace_id":"w9",
                           "label":"worker: ltms-local","pane_count":1}}""");
-                case "tab.list" -> mapper.readTree(("""
+                case "tab.list" -> {
+                    // The base pair is returned for every workspace, exactly as before. Seeded tabs
+                    // are appended only for the workspace they were registered against, so a test
+                    // that seeds none sees the historical response byte for byte.
+                    Object wsId = params instanceof java.util.Map<?, ?> m ? m.get("workspace_id") : null;
+                    List<String> seeded = extraTabs.getOrDefault(String.valueOf(wsId), List.of());
+                    yield mapper.readTree(("""
                         {"type":"tab_list","tabs":[
                           {"tab_id":"w9:t1","workspace_id":"w9","label":"1","pane_count":1},
-                          {"tab_id":"w9:t2","workspace_id":"w9","label":"worker: ltms-local","pane_count":%d}]}""")
-                        .formatted(workerTabPaneCount));
+                          {"tab_id":"w9:t2","workspace_id":"w9","label":"worker: ltms-local","pane_count":%d}%s]}""")
+                            .formatted(workerTabPaneCount,
+                                    seeded.isEmpty() ? "" : "," + String.join(",", seeded)));
+                }
                 case "tab.close" -> mapper.readTree("{\"type\":\"ok\"}");
                 case "pane.get" -> mapper.readTree("""
                         {"type":"pane_info","pane":{"pane_id":"w9:pW","workspace_id":"w9",
                           "tab_id":"w9:t2","agent_status":"idle"}}""");
+                case "pane.list" -> mapper.readTree("""
+                        {"type":"pane_list","panes":[
+                          {"pane_id":"w2:p7","terminal_id":"term_a","workspace_id":"w2","tab_id":"w2:t7","agent":"claude"},
+                          {"pane_id":"w2:p9","terminal_id":"term_shell","workspace_id":"w2","tab_id":"w2:t8"}]}""");
+                case "pane.process_info" -> {
+                    Object paneId = params instanceof java.util.Map<?, ?> m ? m.get("pane_id") : null;
+                    yield "w2:p7".equals(paneId)
+                            ? mapper.readTree(("""
+                                {"type":"pane_process_info","process_info":{"pane_id":"w2:p7","shell_pid":%d,
+                                  "foreground_processes":[{"pid":%d,"name":"node","argv0":"claude"}]}}""")
+                                    .formatted(WORKER_PID, WORKER_PID))
+                            : mapper.readTree("""
+                                {"type":"pane_process_info","process_info":{"pane_id":"w2:p9","shell_pid":9001,
+                                  "foreground_processes":[]}}""");
+                }
                 case "pane.close" -> {
                     if (paneCloseErrorCode != null) {
                         throw new HerdrException("herdr error [" + paneCloseErrorCode + "]: pane.close failed",

bridged/src/test/java/dev/ltms/bridged/herdr/LeadTabScannerTest.java

@@ -0,0 +1,262 @@
+package dev.ltms.bridged.herdr;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.jupiter.api.Test;
+
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicLong;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * CB-531. A lead is never spawned, so the daemon has to <em>find</em> it: these assert that an
+ * operator-labelled tab is what makes a pane a lead, and — just as importantly — what does not.
+ */
+class LeadTabScannerTest {
+
+    private static final ObjectMapper MAPPER = new ObjectMapper();
+    private static final long TTL = TimeUnit.SECONDS.toNanos(10);
+
+    /**
+     * A herdr whose workspace/tab/pane topology is declared per test. Counts calls so the caching
+     * contract can be asserted, and can be made to fail on demand.
+     */
+    private static final class TopologyHerdr implements HerdrClient {
+        /** workspace_id → label. */
+        final Map<String, String> workspaces = new LinkedHashMap<>();
+        /** tab_id → [workspace_id, label]. */
+        final Map<String, String[]> tabs = new LinkedHashMap<>();
+        /** pane_id → [tab_id, terminal_id]. */
+        final Map<String, String[]> panes = new LinkedHashMap<>();
+        int calls;
+        boolean failing;
+
+        TopologyHerdr workspace(String id, String label) {
+            workspaces.put(id, label);
+            return this;
+        }
+
+        TopologyHerdr tab(String tabId, String workspaceId, String label) {
+            tabs.put(tabId, new String[]{workspaceId, label});
+            return this;
+        }
+
+        TopologyHerdr pane(String paneId, String tabId, String terminalId) {
+            panes.put(paneId, new String[]{tabId, terminalId});
+            return this;
+        }
+
+        @Override
+        public JsonNode call(String method, Object params) {
+            calls++;
+            if (failing) {
+                throw new HerdrException("socket closed");
+            }
+            List<String> items = new ArrayList<>();
+            switch (method) {
+                case "workspace.list" -> {
+                    workspaces.forEach((id, label) -> items.add(
+                            "{\"workspace_id\":\"%s\",\"label\":\"%s\"}".formatted(id, label)));
+                    return read("{\"workspaces\":[%s]}".formatted(String.join(",", items)));
+                }
+                case "tab.list" -> {
+                    String ws = String.valueOf(((Map<?, ?>) params).get("workspace_id"));
+                    tabs.forEach((id, t) -> {
+                        if (ws.equals(t[0])) {
+                            items.add(("{\"tab_id\":\"%s\",\"workspace_id\":\"%s\",\"label\":%s,"
+                                    + "\"pane_count\":1}").formatted(id, t[0],
+                                    t[1] == null ? "null" : "\"" + t[1] + "\""));
+                        }
+                    });
+                    return read("{\"tabs\":[%s]}".formatted(String.join(",", items)));
+                }
+                case "pane.list" -> {
+                    panes.forEach((id, p) -> items.add(
+                            "{\"pane_id\":\"%s\",\"tab_id\":\"%s\",\"terminal_id\":\"%s\"}"
+                                    .formatted(id, p[0], p[1])));
+                    return read("{\"panes\":[%s]}".formatted(String.join(",", items)));
+                }
+                default -> throw new AssertionError("unexpected herdr call: " + method);
+            }
+        }
+
+        private static JsonNode read(String json) {
+            try {
+                return MAPPER.readTree(json);
+            } catch (Exception e) {
+                throw new AssertionError(e);
+            }
+        }
+
+        @Override
+        public void close() {
+        }
+    }
+
+    /**
+     * The usual shape: one user space with lead tabs, one worker space bridged owns.
+     *
+     * <p>Not closed: {@code close()} is a no-op on this fake, and every test needs the handle after
+     * the scanner is built (to mutate the topology or read {@code calls}).
+     */
+    @SuppressWarnings("resource")
+    private TopologyHerdr twoLeads() {
+        return new TopologyHerdr()
+                .workspace("w1", "main")
+                .workspace("w9", "bridged-workers")
+                .tab("w1:t1", "w1", "lead: opus-5.0")
+                .tab("w1:t2", "w1", "lead: gpt-sol-5.6")
+                .tab("w1:t3", "w1", "notes")
+                .tab("w9:t1", "w9", "worker: gx10 #1")
+                .pane("w1:p1", "w1:t1", "term_opus")
+                .pane("w1:p2", "w1:t2", "term_gpt")
+                .pane("w1:p3", "w1:t3", "term_notes")
+                .pane("w9:p1", "w9:t1", "term_worker");
+    }
+
+    private LeadTabScanner scanner(TopologyHerdr herdr, Map<String, String> configured,
+                                   AtomicLong clock) {
+        return new LeadTabScanner(herdr, "lead:", Set.of("bridged-workers"), configured, TTL,
+                clock::get);
+    }
+
+    @Test
+    void everyLabelledTabBecomesALeadNamedByItsLabel() {
+        Map<String, String> leads = scanner(twoLeads(), Map.of(), new AtomicLong()).get();
+
+        assertEquals(Map.of("term_opus", "opus-5.0", "term_gpt", "gpt-sol-5.6"), leads,
+                "two leads discovered from labels alone — no terminal_id was ever configured");
+    }
+
+    @Test
+    void anUnlabelledTabContributesNothing() {
+        assertFalse(scanner(twoLeads(), Map.of(), new AtomicLong()).get().containsKey("term_notes"));
+    }
+
+    /**
+     * The guard that matters: bridged labels its own worker tabs, so if a worker space were scanned
+     * a naming accident would promote the fleet. The exclusion is by workspace, not by hoping the
+     * worker template never collides.
+     */
+    @Test
+    void aTabInAWorkerSpaceIsNeverALeadEvenWhenItsLabelMatches() {
+        TopologyHerdr herdr = twoLeads().tab("w9:t2", "w9", "lead: impostor")
+                .pane("w9:p2", "w9:t2", "term_impostor");
+
+        assertFalse(scanner(herdr, Map.of(), new AtomicLong()).get().containsKey("term_impostor"));
+    }
+
+    @Test
+    void aBarePrefixNamesNobodyAndIsRejected() {
+        TopologyHerdr herdr = new TopologyHerdr().workspace("w1", "main")
+                .tab("w1:t1", "w1", "lead:").pane("w1:p1", "w1:t1", "term_a");
+
+        assertEquals(Map.of(), scanner(herdr, Map.of(), new AtomicLong()).get(),
+                "a lead with no name would resolve as PRIMARY with nothing to attribute it to");
+    }
+
+    @Test
+    void thePrefixMatchesCaseInsensitivelyAndTheNameIsTrimmed() {
+        TopologyHerdr herdr = new TopologyHerdr().workspace("w1", "main")
+                .tab("w1:t1", "w1", "  LEAD:   opus-5.0  ").pane("w1:p1", "w1:t1", "term_a");
+
+        assertEquals(Map.of("term_a", "opus-5.0"), scanner(herdr, Map.of(), new AtomicLong()).get());
+    }
+
+    @Test
+    void everyPaneInALeadTabResolvesAsThatLead() {
+        // A human may split their own lead tab. Both panes are theirs, so both are that lead —
+        // nothing bridged placed can land here (see the worker-space test above).
+        TopologyHerdr herdr = twoLeads().pane("w1:p1b", "w1:t1", "term_opus_split");
+
+        assertEquals("opus-5.0", scanner(herdr, Map.of(), new AtomicLong()).get().get("term_opus_split"));
+    }
+
+    @Test
+    void anExplicitlyConfiguredLeadIsMergedInAndOutranksALabel() {
+        Map<String, String> configured = Map.of("term_opus", "pinned-name", "term_extra", "from-config");
+
+        Map<String, String> leads = scanner(twoLeads(), configured, new AtomicLong()).get();
+
+        assertEquals("pinned-name", leads.get("term_opus"), "an explicit pin is the operator's last word");
+        assertEquals("from-config", leads.get("term_extra"), "a configured lead needs no tab at all");
+        assertEquals("gpt-sol-5.6", leads.get("term_gpt"));
+    }
+
+    // ── caching ─────────────────────────────────────────────────────────────────────────────────
+
+    @Test
+    void aSecondLookupWithinTheTtlDoesNotTouchHerdr() {
+        TopologyHerdr herdr = twoLeads();
+        AtomicLong clock = new AtomicLong();
+        LeadTabScanner s = scanner(herdr, Map.of(), clock);
+
+        s.get();
+        int afterFirst = herdr.calls;
+        clock.addAndGet(TTL - 1);
+        s.get();
+
+        assertEquals(afterFirst, herdr.calls,
+                "resolve() runs on every request — an un-cached scan would put herdr on that path");
+    }
+
+    @Test
+    void aTabLabelledAfterStartupIsPickedUpOnceTheTtlExpires() {
+        TopologyHerdr herdr = twoLeads();
+        AtomicLong clock = new AtomicLong();
+        LeadTabScanner s = scanner(herdr, Map.of(), clock);
+        assertFalse(s.get().containsKey("term_notes"));
+
+        herdr.tab("w1:t3", "w1", "lead: late-arrival"); // the operator renames their tab
+        clock.addAndGet(TTL);
+
+        assertEquals("late-arrival", s.get().get("term_notes"),
+                "the whole point over `leaders:`: no config edit, no restart");
+    }
+
+    @Test
+    void aFailedScanKeepsTheLeadsAlreadyKnownRatherThanDemotingThem() {
+        TopologyHerdr herdr = twoLeads();
+        AtomicLong clock = new AtomicLong();
+        LeadTabScanner s = scanner(herdr, Map.of(), clock);
+        Map<String, String> before = s.get();
+
+        herdr.failing = true;
+        clock.addAndGet(TTL);
+
+        assertEquals(before, s.get(),
+                "a herdr hiccup must not silently demote a live lead to a worker mid-session");
+    }
+
+    @Test
+    void aFailedFirstScanStillHonoursTheConfiguredLeads() {
+        TopologyHerdr herdr = twoLeads();
+        herdr.failing = true;
+
+        Map<String, String> leads = scanner(herdr, Map.of("term_x", "opus-5.0"), new AtomicLong()).get();
+
+        assertEquals(Map.of("term_x", "opus-5.0"), leads,
+                "config-named leads must not depend on herdr answering at all");
+    }
+
+    @Test
+    void aDownHerdrIsRetriedOncePerTtlNotOncePerRequest() {
+        TopologyHerdr herdr = twoLeads();
+        herdr.failing = true;
+        AtomicLong clock = new AtomicLong();
+        LeadTabScanner s = scanner(herdr, Map.of(), clock);
+
+        s.get();
+        int afterFirst = herdr.calls;
+        s.get();
+        s.get();
+
+        assertEquals(afterFirst, herdr.calls, "the failure path must be rate-limited too");
+    }
+}

bridged/src/test/java/dev/ltms/bridged/herdr/PaneLocatorContractTest.java

@@ -0,0 +1,48 @@
+package dev.ltms.bridged.herdr;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import org.junit.jupiter.api.Tag;
+import org.junit.jupiter.api.Test;
+
+import java.nio.file.Files;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assumptions.assumeTrue;
+
+/**
+ * Contract test for {@link PaneLocator} against a REAL herdr: the PID→pane mapping that
+ * connection identity rests on. Uses a throwaway tab's seed shell as the probe process
+ * (protocol 19 removed arbitrary-command agents), and always tears the space down.
+ *
+ * <p>Tagged {@code contract}; run with {@code mvn test -Pcontract}.
+ */
+@Tag("contract")
+class PaneLocatorContractTest {
+
+    @Test
+    void resolvesTheTerminalOwningARealProcessPid() throws Exception {
+        assumeTrue(Files.exists(UnixSocketHerdrClient.defaultSocketPath()), "no herdr socket — skipping");
+        try (UnixSocketHerdrClient herdr = UnixSocketHerdrClient.connect()) {
+            WorkspaceControl spaces = new WorkspaceControl(herdr);
+            Workspace space = spaces.ensureWorkspace("__bridged_pid_contract__");
+            Tab.Created tab = spaces.createTab(space.workspaceId(), null, Map.of());
+            try {
+                JsonNode info = herdr.call("pane.process_info", Map.of("pane_id", tab.rootPaneId()))
+                        .path("process_info");
+                long shellPid = info.path("shell_pid").asLong(-1);
+                assertTrue(shellPid > 0, "seed pane should report a shell pid");
+
+                String terminalId = herdr.call("pane.get", Map.of("pane_id", tab.rootPaneId()))
+                        .path("pane").path("terminal_id").asText(null);
+                assertNotNull(terminalId, "seed pane should carry a terminal_id");
+
+                assertEquals(terminalId, new PaneLocator(herdr).terminalForPid(shellPid),
+                        "a real PID must resolve back to its own pane's terminal_id");
+            } finally {
+                spaces.closeTab(tab.tab().tabId());
+                herdr.call("workspace.close", Map.of("workspace_id", space.workspaceId()));
+            }
+        }
+    }
+}

bridged/src/test/java/dev/ltms/bridged/herdr/PaneLocatorTest.java

@@ -0,0 +1,27 @@
+package dev.ltms.bridged.herdr;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/** Unit tests for PID → pane resolution (the herdr half of connection-based MCP identity). */
+class PaneLocatorTest {
+
+    private final PaneLocator loc = new PaneLocator(new FakeHerdr());
+
+    @Test
+    void resolvesTerminalForAForegroundPid() {
+        assertEquals("term_a", loc.terminalForPid(FakeHerdr.WORKER_PID));
+    }
+
+    @Test
+    void nullForAPidInNoPane() {
+        assertNull(loc.terminalForPid(999_999));
+    }
+
+    @Test
+    void nullForNonPositivePid() {
+        assertNull(loc.terminalForPid(0));
+        assertNull(loc.terminalForPid(-1));
+    }
+}

bridged/src/test/java/dev/ltms/bridged/herdr/WorkspacePlacementContractTest.java

@@ -5,7 +5,6 @@ import org.junit.jupiter.api.Tag;
 import org.junit.jupiter.api.Test;
 
 import java.nio.file.Files;
-import java.util.List;
 import java.util.Map;
 
 import static org.junit.jupiter.api.Assertions.*;
@@ -13,9 +12,9 @@ import static org.junit.jupiter.api.Assumptions.assumeTrue;
 
 /**
  * Contract test for the placement layer ({@code workspace.*}/{@code tab.*}) against a
- * REAL herdr, locking in the "one clean tab per worker" recipe: find-or-create a worker
- * space, give the worker its own tab, drop herdr's seed shell so the tab holds only the
- * worker, and tear it all down. Uses a HARMLESS probe (never {@code claude}) in a
+ * REAL herdr, locking in the "one clean tab per worker" recipe under protocol 19: find-or-create
+ * a worker space, give the worker its own tab, and the SEED pane is where the worker starts —
+ * the tab holds exactly that one pane from creation. Uses no agent (never {@code claude}) in a
  * throwaway space that is fully removed at the end.
  *
  * <p>Tagged {@code contract}; run with {@code mvn test -Pcontract}.
@@ -41,7 +40,6 @@ class WorkspacePlacementContractTest {
     void workerGetsOwnCleanTabAndTearsDownCompletely() throws Exception {
         assumeTrue(!noSocket(), "no herdr socket — skipping");
         try (UnixSocketHerdrClient herdr = UnixSocketHerdrClient.connect()) {
-            AgentControl agents = new AgentControl(herdr);
             WorkspaceControl spaces = new WorkspaceControl(herdr);
 
             Workspace space = spaces.ensureWorkspace(LABEL);
@@ -49,36 +47,27 @@ class WorkspacePlacementContractTest {
             // Idempotent: a second ensure finds the same space, never creates a duplicate.
             assertEquals(space.workspaceId(), spaces.ensureWorkspace(LABEL).workspaceId());
 
-            Tab.Created tab = spaces.createTab(space.workspaceId());
-            Agent worker = agents.start(
-                    "__contract__",
-                    List.of("bash", "-c", "sleep 20"),
-                    Map.of(),
-                    tab.tab().tabId());
+            Tab.Created tab = spaces.createTab(space.workspaceId(), null, Map.of());
             try {
-                // The worker landed in its dedicated tab in the worker space.
-                assertEquals(tab.tab().tabId(), worker.tabId());
-                assertEquals(space.workspaceId(), worker.workspaceId());
+                assertNotNull(tab.rootPaneId(), "tab.create must return the seed pane");
 
-                // Drop the seed shell; the tab now holds exactly the worker pane.
-                agents.close(tab.rootPaneId());
+                // Protocol 19: the seed pane IS the worker pane — the tab holds exactly it.
                 spaces.renameTab(tab.tab().tabId(), "worker: contract");
                 assertEquals(1, paneCount(herdr, space.workspaceId(), tab.tab().tabId()),
-                        "worker tab must hold only the worker pane after the seed shell is dropped");
+                        "worker tab must hold exactly the seed/worker pane");
 
                 // Teardown resolves the tab from the pane, and sees it holds exactly one pane.
-                WorkspaceControl.PaneLocation loc = spaces.locatePane(worker.paneId());
+                WorkspaceControl.PaneLocation loc = spaces.locatePane(tab.rootPaneId());
                 assertNotNull(loc);
                 assertEquals(tab.tab().tabId(), loc.tabId());
-                assertEquals(1, loc.tabPaneCount(), "worker is the tab's sole occupant");
+                assertEquals(1, loc.tabPaneCount(), "worker pane is the tab's sole occupant");
             } finally {
-                agents.close(worker.paneId());
                 spaces.closeTab(tab.tab().tabId());
             }
 
             // Tolerant teardown: closing an already-gone tab / reading a gone pane is a no-op.
             spaces.closeTab(tab.tab().tabId());
-            assertNull(spaces.locatePane(worker.paneId()), "closed worker pane must be gone");
+            assertNull(spaces.locatePane(tab.rootPaneId()), "closed worker pane must be gone");
 
             // Remove the throwaway space entirely so the test leaves no residue.
             herdr.call("workspace.close", Map.of("workspace_id", space.workspaceId()));

bridged/src/test/java/dev/ltms/bridged/inject/CompletionResolverTest.java

@@ -0,0 +1,371 @@
+package dev.ltms.bridged.inject;
+
+import ch.qos.logback.classic.Level;
+import ch.qos.logback.classic.LoggerContext;
+import ch.qos.logback.classic.spi.ILoggingEvent;
+import ch.qos.logback.core.read.ListAppender;
+import dev.ltms.bridged.herdr.AgentControl;
+import dev.ltms.bridged.herdr.FakeHerdr;
+import dev.ltms.bridged.msg.Rendezvous;
+import org.junit.jupiter.api.Test;
+import org.slf4j.LoggerFactory;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/** Unit behaviour of the CB-106 completion resolver in isolation from the injector. */
+class CompletionResolverTest {
+
+    @Test
+    void skipsTheScrapeWhenNoSendIsWaiting() {
+        FakeHerdr herdr = new FakeHerdr();
+        Rendezvous rendezvous = new Rendezvous(); // no waiter opened
+        CompletionResolver resolver = new CompletionResolver(new AgentControl(herdr), rendezvous);
+
+        resolver.resolve("term_a", null); // no in-flight turn captured for this target
+
+        assertFalse(herdr.called("agent.read"),
+                "a turn nobody is blocked on must not cost a transcript scrape");
+    }
+
+    @Test
+    void failSkipsTheScrapeWhenNoSendIsWaiting() {
+        FakeHerdr herdr = new FakeHerdr();
+        Rendezvous rendezvous = new Rendezvous(); // no waiter opened
+        CompletionResolver resolver = new CompletionResolver(new AgentControl(herdr), rendezvous);
+
+        resolver.fail("term_a", null); // no in-flight turn, and no registered waiter to fall back to
+
+        assertFalse(herdr.called("agent.read"),
+                "a wedge nobody is blocked on must not cost a transcript scrape");
+    }
+
+    @Test
+    void captureBaselineSkipsTheReadWhenNoSendIsWaiting() {
+        FakeHerdr herdr = new FakeHerdr().readText("⏺ X\n❯ ");
+        Rendezvous rendezvous = new Rendezvous(); // no waiter opened
+        CompletionResolver resolver = new CompletionResolver(new AgentControl(herdr), rendezvous);
+
+        resolver.captureBaseline("term_a"); // no send to attribute a later completion to
+
+        assertFalse(herdr.called("agent.read"),
+                "with no waiting send there is no turn to baseline — skip the scrape");
+    }
+
+    // --- CB-115 clean scrape: extract the last assistant block ----------------
+
+    @Test
+    void extractsTheLastAssistantBlockStrippingChrome() {
+        String raw = """
+                ⏺ Reading the file…
+
+                ⏺ Done. The bug was an off-by-one in the loop bound.
+
+                ╭──────────────────────────────────────╮
+                │ >                                    │
+                ╰──────────────────────────────────────╯
+                  ⏵⏵ auto mode on · ? for shortcuts
+                """;
+        assertEquals("Done. The bug was an off-by-one in the loop bound.",
+                CompletionResolver.lastAssistantBlock(raw));
+    }
+
+    @Test
+    void keepsMultiLineAssistantContent() {
+        String raw = "⏺ Line one.\nLine two.\n❯ ";
+        assertEquals("Line one.\nLine two.", CompletionResolver.lastAssistantBlock(raw));
+    }
+
+    @Test
+    void fallsBackToRawTextWhenThereIsNoMarker() {
+        String raw = "plain worker output with no glyph";
+        assertEquals("plain worker output with no glyph", CompletionResolver.lastAssistantBlock(raw));
+    }
+
+    @Test
+    void blankScrapeYieldsEmpty() {
+        assertTrue(CompletionResolver.lastAssistantBlock("").isEmpty());
+        assertTrue(CompletionResolver.lastAssistantBlock(null).isEmpty());
+    }
+
+    @Test
+    void stripsSpinnerAndRuleChrome() {
+        String raw = """
+                ⏺ Channel check confirmed — your message got through.
+
+                ✻ Brewed for 11s
+
+                ─────────────────────────────────────
+                """;
+        assertEquals("Channel check confirmed — your message got through.",
+                CompletionResolver.lastAssistantBlock(raw));
+    }
+
+    @Test
+    void cutsANextTurnPromptEchoAndTrailingTipsFromTheBlock() {
+        // The exact turn-2 leak: the scrape captured the settled answer, then a "✻ Cooked" spinner,
+        // then the NEXT turn's echoed prompt, then a "✶ Forming…" spinner and trailing tips/warnings
+        // whose lines (⎿, ⚠) are not themselves chrome-terminated. Stopping at the first boundary
+        // (the ✻ spinner) is what keeps every one of those interface lines out of the reply.
+        String raw = """
+                ⏺ Channel confirmed — the bridge reply delivered successfully.
+
+                ✻ Cooked for 9s
+
+                ❯ Thanks. Now a small task: what is 17 * 23? Show just the number.
+
+
+
+                ✶ Forming…
+                  ⎿  Tip: Name your conversations with /rename
+                  ⚠ claude.ai connectors are disabled because ANTHROPIC_API_KEY is set
+                """;
+        assertEquals("Channel confirmed — the bridge reply delivered successfully.",
+                CompletionResolver.lastAssistantBlock(raw));
+    }
+
+    // --- CB-115 misattribution guard: suppress a stale (unchanged) completion -------
+
+    @Test
+    void suppressesACompletionWhoseScrapeIsUnchangedFromDelivery() {
+        // Rapid back-to-back turn: the pane still shows the PREVIOUS turn's answer when this turn's
+        // (misattributed) completion boundary fires. The scrape == the delivery baseline, so the
+        // send must NOT be resolved with the stale answer.
+        FakeHerdr herdr = new FakeHerdr().readText("⏺ 391\n❯ ");
+        Rendezvous rendezvous = new Rendezvous();
+        CompletionResolver resolver = new CompletionResolver(new AgentControl(herdr), rendezvous);
+
+        var waiter = rendezvous.open("term_a");   // a send is blocked on this turn
+        // The turn as captured at delivery: its waiter, and the previous turn's answer still on screen.
+        var turn = new CompletionResolver.InFlight(waiter, "391");
+        resolver.resolve("term_a", turn);          // scrape still "391" == baseline → suppress
+
+        assertFalse(waiter.isDone(), "a completion with no output change must not resolve the send");
+        assertTrue(rendezvous.isWaiting("term_a"), "the send stays waiting for a real reply");
+    }
+
+    @Test
+    void resolvesACompletionWhoseScrapeChangedSinceDelivery() {
+        FakeHerdr herdr = new FakeHerdr().readText("⏺ No, 391 = 17 × 23.\n❯ "); // the worker's real answer
+        Rendezvous rendezvous = new Rendezvous();
+        CompletionResolver resolver = new CompletionResolver(new AgentControl(herdr), rendezvous);
+
+        var waiter = rendezvous.open("term_a");
+        // Delivery baseline was the previous turn's "391"; the scrape now differs → resolve.
+        var turn = new CompletionResolver.InFlight(waiter, "391");
+        resolver.resolve("term_a", turn);
+
+        assertTrue(waiter.isDone(), "a completion with new output must resolve the send");
+        assertEquals(Rendezvous.Kind.COMPLETION, waiter.getNow(null).kind());
+        assertEquals("No, 391 = 17 × 23.", waiter.getNow(null).text());
+    }
+
+    @Test
+    void marksAClippedCompletionPaneTail() {
+        String block = "⏺ " + "x".repeat(CompletionResolver.MAX_SCRAPE_CHARS + 1) + "\n❯ ";
+        FakeHerdr herdr = new FakeHerdr().readText(block);
+        Rendezvous rendezvous = new Rendezvous();
+        CompletionResolver resolver = new CompletionResolver(new AgentControl(herdr), rendezvous);
+
+        var waiter = rendezvous.open("term_a");
+        resolver.resolve("term_a", new CompletionResolver.InFlight(waiter, null));
+
+        assertEquals("x".repeat(CompletionResolver.MAX_SCRAPE_CHARS)
+                        + "\n[Pane tail clipped: member did not call bridge_reply.]",
+                waiter.getNow(null).text());
+    }
+
+    @Test
+    void leavesAnUnclippedCompletionPaneTailUnmarked() {
+        FakeHerdr herdr = new FakeHerdr().readText("⏺ complete report\n❯ ");
+        Rendezvous rendezvous = new Rendezvous();
+        CompletionResolver resolver = new CompletionResolver(new AgentControl(herdr), rendezvous);
+
+        var waiter = rendezvous.open("term_a");
+        resolver.resolve("term_a", new CompletionResolver.InFlight(waiter, null));
+
+        assertEquals("complete report", waiter.getNow(null).text());
+    }
+
+    @Test
+    void resolvesSynchronouslyBeforePostTurnContextClearing() {
+        FakeHerdr herdr = new FakeHerdr().readText("⏺ previous answer\n❯ ");
+        Rendezvous rendezvous = new Rendezvous();
+        CompletionResolver resolver = new CompletionResolver(new AgentControl(herdr), rendezvous);
+        var waiter = rendezvous.open("term_a");
+        resolver.captureBaseline("term_a");
+        herdr.readText("⏺ answer that /clear would erase\n❯ ");
+
+        resolver.resolveBeforePostAction("term_a");
+
+        assertTrue(waiter.isDone(), "the answer is captured before the adapter sends /clear");
+        assertEquals("answer that /clear would erase", waiter.getNow(null).text());
+    }
+
+    @Test
+    void suppressesAnUnchangedCompletionEvenWhenTheBlockExceedsTheScrapeCap() {
+        // The fan-out issue-hunt finding: captureBaseline once stored the RAW (unclipped) assistant
+        // block while resolve compares against a clip()'d tail. For a block longer than MAX_SCRAPE_CHARS
+        // the two capped representations differ even when the pane never changed, so the CB-115
+        // byte-identical guard failed to fire and a stale completion could resolve the send. Both sides
+        // must clip identically. The returned-text marker is added only after this comparison, so an
+        // unchanged >cap block on rapid back-to-back turns still stays suppressed.
+        String longBlock = "⏺ " + "x".repeat(CompletionResolver.MAX_SCRAPE_CHARS + 500) + "\n❯ ";
+        FakeHerdr herdr = new FakeHerdr().readText(longBlock);
+        Rendezvous rendezvous = new Rendezvous();
+        CompletionResolver resolver = new CompletionResolver(new AgentControl(herdr), rendezvous);
+
+        var waiter = rendezvous.open("term_a");        // a send is blocked on this turn
+        resolver.captureBaseline("term_a");            // baseline is the clipped >cap block
+        var turn = resolver.inFlight("term_a");
+        assertEquals(CompletionResolver.MAX_SCRAPE_CHARS, turn.baseline().length(),
+                "the delivery baseline is clipped to the same cap resolve() applies to the tail");
+
+        resolver.resolve("term_a", turn);              // scrape unchanged → clipped tail == baseline → suppress
+
+        assertFalse(waiter.isDone(),
+                "an unchanged >cap block must still be recognised as stale and suppressed");
+        assertTrue(rendezvous.isWaiting("term_a"), "the send stays waiting for a real reply");
+    }
+
+    @Test
+    void resolvesWhenThereIsNoBaseline() {
+        // No delivery baseline (e.g. the pre-turn read failed) ⇒ never suppress; the completion resolves.
+        FakeHerdr herdr = new FakeHerdr().readText("⏺ hello\n❯ ");
+        Rendezvous rendezvous = new Rendezvous();
+        CompletionResolver resolver = new CompletionResolver(new AgentControl(herdr), rendezvous);
+
+        var waiter = rendezvous.open("term_a");
+        resolver.resolve("term_a", new CompletionResolver.InFlight(waiter, null));
+
+        assertTrue(waiter.isDone(), "with no baseline a completion resolves as before");
+        assertEquals("hello", waiter.getNow(null).text());
+    }
+
+    @Test
+    void resolvesWhenTheScrapeItselfFailsEvenWithABaselinePresent() {
+        // The most important branch of the CB-115 guard: a failed read means the resolver could not
+        // SEE the screen — "couldn't see", not "no change". It must still resolve the send (an empty
+        // tail beats hanging until the caller's timeout), even though a baseline was captured. The
+        // baseline here is "" (an empty pane at delivery), so without the !scrapeFailed clause the
+        // byte-identical guard would wrongly match the empty tail and suppress.
+        FakeHerdr herdr = new FakeHerdr().healthy(false); // agent.read throws HerdrException
+        Rendezvous rendezvous = new Rendezvous();
+        CompletionResolver resolver = new CompletionResolver(new AgentControl(herdr), rendezvous);
+
+        var waiter = rendezvous.open("term_a");
+        var turn = new CompletionResolver.InFlight(waiter, ""); // empty pane baselined at delivery
+        resolver.resolve("term_a", turn);
+
+        assertTrue(waiter.isDone(),
+                "a failed scrape must still resolve the send, not hang until the caller's timeout");
+        assertEquals(Rendezvous.Kind.COMPLETION, waiter.getNow(null).kind());
+        assertEquals("", waiter.getNow(null).text(), "the tail is empty because the screen was unreadable");
+    }
+
+    // --- CB-115/CB-116 fail guard: an already-done or absent waiter is left alone ---------
+
+    @Test
+    void failLeavesAnAlreadyResolvedWaiterUntouchedAndSkipsTheScrape() {
+        // The send was already resolved (e.g. by the worker's explicit reply) before fail fired.
+        // fail must not overwrite that value, and must not even scrape the worker — nobody needs it.
+        FakeHerdr herdr = new FakeHerdr().readText("an error screen");
+        Rendezvous rendezvous = new Rendezvous();
+        CompletionResolver resolver = new CompletionResolver(new AgentControl(herdr), rendezvous);
+
+        var waiter = rendezvous.open("term_a");
+        var turn = new CompletionResolver.InFlight(waiter, null);
+        assertTrue(rendezvous.resolveCompletion(waiter, "already replied"));
+
+        resolver.fail("term_a", turn);
+
+        assertFalse(herdr.called("agent.read"),
+                "fail must not scrape a waiter that is already done");
+        assertEquals(Rendezvous.Kind.COMPLETION, waiter.getNow(null).kind(),
+                "fail must not overwrite the existing resolution");
+        assertEquals("already replied", waiter.getNow(null).text());
+    }
+
+    @Test
+    void failFallsBackToTheRegisteredWaiterWhenThereIsNoInFlightTurn() {
+        // A never-delivered readiness failure has no in-flight record but still has a blocked send;
+        // fail falls back to the waiter currently registered on the Rendezvous and fails it.
+        FakeHerdr herdr = new FakeHerdr().readText("stuck on an error screen");
+        Rendezvous rendezvous = new Rendezvous();
+        CompletionResolver resolver = new CompletionResolver(new AgentControl(herdr), rendezvous);
+
+        var waiter = rendezvous.open("term_a"); // send registered, but no captureBaseline ever ran
+        resolver.fail("term_a", null);          // no in-flight turn → fall back to the registered waiter
+
+        assertTrue(waiter.isDone(), "fail falls back to the registered waiter when no turn is in flight");
+        assertEquals(Rendezvous.Kind.FAILED, waiter.getNow(null).kind());
+        assertEquals("stuck on an error screen", waiter.getNow(null).text());
+    }
+
+    @Test
+    void failIsLoggedAtWarnWithTheReason() {
+        // CB-564: this used to be a bare DEBUG "failed send to X via turn-stall fallback" — a symptom
+        // with no cause, and below the level anyone watching for member health would see. A fail that
+        // resolves a caller's blocked send is at least WARN and must carry the reason.
+        LoggerContext ctx = (LoggerContext) LoggerFactory.getILoggerFactory();
+        ch.qos.logback.classic.Logger resolverLog =
+                (ch.qos.logback.classic.Logger) LoggerFactory.getLogger(CompletionResolver.class);
+        ListAppender<ILoggingEvent> appender = new ListAppender<>();
+        appender.setContext(ctx);
+        appender.start();
+        resolverLog.addAppender(appender);
+        resolverLog.setLevel(Level.WARN);
+        try {
+            FakeHerdr herdr = new FakeHerdr().readText("stuck on an error screen");
+            Rendezvous rendezvous = new Rendezvous();
+            CompletionResolver resolver = new CompletionResolver(new AgentControl(herdr), rendezvous);
+            var waiter = rendezvous.open("term_a");
+
+            resolver.fail("term_a", null);
+
+            String warn = appender.list.stream()
+                    .filter(e -> e.getLevel().equals(Level.WARN))
+                    .map(ILoggingEvent::getFormattedMessage)
+                    .findFirst()
+                    .orElse("no turn-stall WARN logged");
+            assertTrue(warn.contains("term_a"), "the log names the target: " + warn);
+            assertTrue(warn.contains("stuck on an error screen"), "the log carries the reason: " + warn);
+            assertTrue(waiter.isDone());
+        } finally {
+            resolverLog.detachAppender(appender);
+        }
+    }
+
+    // --- CB-116 waiter identity: a late completion never crosses into the next turn ---------
+
+    @Test
+    void aLateCompletionForOneTurnNeverResolvesTheNextTurnsWaiter() {
+        // The cross-turn stale reply the conversation test surfaced: turn N's completion fallback
+        // fires AFTER turn N was resolved by an explicit bridge_reply and turn N+1 has opened its own
+        // waiter on the same session. Resolving "whatever is waiting now" would hand turn N's stale
+        // scrape to turn N+1; targeting turn N's captured waiter makes the late completion a no-op.
+        FakeHerdr herdr = new FakeHerdr().readText("⏺ turn N answer\n❯ ");
+        Rendezvous rendezvous = new Rendezvous();
+        CompletionResolver resolver = new CompletionResolver(new AgentControl(herdr), rendezvous);
+
+        var waiterN = rendezvous.open("term_a"); // turn N's send
+        // The turn as the injector captured it at delivery (waiter + pre-turn baseline).
+        var turnN = new CompletionResolver.InFlight(waiterN, "an earlier answer");
+
+        // Turn N is resolved by the worker's explicit reply, and its send deregisters the waiter.
+        assertTrue(rendezvous.resolve("term_a", "N replied"));
+        rendezvous.close("term_a", waiterN); // the sender's finally, before the next turn opens
+
+        // Turn N+1's send opens its own waiter on the same session (CB-548: open fails if the
+        // previous waiter is still registered, so a clean turn deregisters it first as above).
+        var waiterN1 = rendezvous.open("term_a");
+
+        resolver.resolve("term_a", turnN); // turn N's completion fallback finally fires
+
+        assertFalse(waiterN1.isDone(), "turn N's late completion must not resolve turn N+1's waiter");
+        assertEquals(Rendezvous.Kind.REPLY, waiterN.getNow(null).kind(),
+                "turn N stays resolved by its own reply");
+        assertTrue(rendezvous.isWaiting("term_a"), "turn N+1 is still awaiting its own resolution");
+    }
+}