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fleetd #803/#804: fix null-ticket NPE, grant collaborator TASK_READ #806

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agent commented 2026-10-07 05:26:57 +02:00
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Fixes #803 and #804 in one PR, as delegated.

#803 — fleet_poll{} with no ticket throws NPE for an observer

MessageService.ownsTicket(String, String) called tasks.get(null) when
ticket was null (fleet_poll{} with no arguments resolves to TASK_READ with
ticket == null). ConcurrentHashMap.get(null) throws NPE instead of a clean
refusal. Fixed by guarding the lookup in ownsTicket itself:

Task task = ticket == null ? null : tasks.get(ticket);
return task != null && ownsTicket(task, callerOwner);

#804 — a collaborator cannot read a ticket it created

TASK_READ's grant only covered primary/worker/architect/observer, so a
collaborator that creates a ticket via fleet_send to another collaborator
(permitted by SENDs knownLeadOrCollaborator classifier) could never read it
back. Extended Authzs TASK_READ grant to include collaborator, confined by
the same ownership classifier observer already uses (renamed
observerOwnsTicket -> ticketOwnedByCaller since it now serves two roles;
renamed Authz.NO_OBSERVER_OWNED_TICKET -> Authz.NO_OWNED_TICKET to match).

Also gated the ticket nudge in ReplyPushLoop the same way #778 gated the
reply/question nudges: PrimaryRegistry now records a third per-delegation
boolean (mayTaskReadNudge, computed via a real Authz.permits call at
delegation-accept time) alongside the existing mayDrainNudge/mayAnswerNudge,
and ReplyPushLoop.pendingTicketsFor filters on it so no caller is ever
nudged to run a fleet_poll{ticket} its own role would refuse.

Booleans only cross the mcp -> msg package boundary (PackageCyclesTest stays
green); REST (FleetApp.taskStatus) needed no additional branching since it
already supplies the real classifier unconditionally.

Tests added

  • MessageServiceTest: ownsTicket(null, owner) returns false rather than
    throwing.
  • FleetMcpAuthzTest: fleet_poll with no ticket is refused, not thrown, for
    an observer; a collaborator may TASK_READ a ticket it created and may not
    read one another caller created.
  • AuthzTest: collaborator TASK_READ matrix (own ticket granted, anothers
    ticket denied, 3-arg convenience form fails closed).
  • ReplyPushLoopTest: a ticket nudge is suppressed for a delegator Authz
    refuses TASK_READ to, and still sent for one it permits.

Build

mvn clean install, unpiped, full output captured:

Tests run: 2233, Failures: 0, Errors: 0, Skipped: 0
BUILD SUCCESS

PackageCyclesTest ran separately and passed (1 test, 0 failures) -- no new
package cycle introduced.

Re-checked #803 and #804 for new comments immediately before this commit:
both still have 0 comments, bodies unchanged from the original brief.

Fixes #803 and #804 in one PR, as delegated. ## #803 — fleet_poll{} with no ticket throws NPE for an observer MessageService.ownsTicket(String, String) called tasks.get(null) when ticket was null (fleet_poll{} with no arguments resolves to TASK_READ with ticket == null). ConcurrentHashMap.get(null) throws NPE instead of a clean refusal. Fixed by guarding the lookup in ownsTicket itself: Task task = ticket == null ? null : tasks.get(ticket); return task != null && ownsTicket(task, callerOwner); ## #804 — a collaborator cannot read a ticket it created TASK_READ's grant only covered primary/worker/architect/observer, so a collaborator that creates a ticket via fleet_send to another collaborator (permitted by SENDs knownLeadOrCollaborator classifier) could never read it back. Extended Authzs TASK_READ grant to include collaborator, confined by the same ownership classifier observer already uses (renamed observerOwnsTicket -> ticketOwnedByCaller since it now serves two roles; renamed Authz.NO_OBSERVER_OWNED_TICKET -> Authz.NO_OWNED_TICKET to match). Also gated the ticket nudge in ReplyPushLoop the same way #778 gated the reply/question nudges: PrimaryRegistry now records a third per-delegation boolean (mayTaskReadNudge, computed via a real Authz.permits call at delegation-accept time) alongside the existing mayDrainNudge/mayAnswerNudge, and ReplyPushLoop.pendingTicketsFor filters on it so no caller is ever nudged to run a fleet_poll{ticket} its own role would refuse. Booleans only cross the mcp -> msg package boundary (PackageCyclesTest stays green); REST (FleetApp.taskStatus) needed no additional branching since it already supplies the real classifier unconditionally. ## Tests added - MessageServiceTest: ownsTicket(null, owner) returns false rather than throwing. - FleetMcpAuthzTest: fleet_poll with no ticket is refused, not thrown, for an observer; a collaborator may TASK_READ a ticket it created and may not read one another caller created. - AuthzTest: collaborator TASK_READ matrix (own ticket granted, anothers ticket denied, 3-arg convenience form fails closed). - ReplyPushLoopTest: a ticket nudge is suppressed for a delegator Authz refuses TASK_READ to, and still sent for one it permits. ## Build mvn clean install, unpiped, full output captured: Tests run: 2233, Failures: 0, Errors: 0, Skipped: 0 BUILD SUCCESS PackageCyclesTest ran separately and passed (1 test, 0 failures) -- no new package cycle introduced. Re-checked #803 and #804 for new comments immediately before this commit: both still have 0 comments, bodies unchanged from the original brief.
agent added 1 commit 2026-10-07 05:26:57 +02:00
fleetd #803/#804: fix null-ticket NPE in ownsTicket, grant collaborator TASK_READ
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72cc7560f1 
#803: MessageService.ownsTicket(String, String) called tasks.get(null) when
fleet_poll{} supplied no ticket, throwing NPE instead of refusing. Guard the
lookup so a null ticket returns false, same as an unknown one.

#804: a collaborator could create a ticket via fleet_send to another
collaborator but could never read it back, since TASK_READ's grant only
covered primary/worker/architect/observer. Extend the grant to a collaborator
confined by the same ownership classifier observer already uses, rename the
classifier parameter now that it serves both roles, and gate the ticket-nudge
in ReplyPushLoop the same way #778 gated the reply/question nudges so no
caller is nudged toward a fleet_poll its role would refuse.
ltms commented 2026-10-07 05:32:42 +02:00
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Lead review. The #803 null guard and the #804 Authz grant are correct and stay. One change in this PR is dead code, and I have asked for it to be removed on this same branch.

Build, verified by me, not taken from the worker. Merged 72cc756 onto main (50c7674) in a throwaway worktree. The auto-merge was clean — ReplyPushLoop.java and ReplyPushLoopTest.java auto-merged against fcce443, the prompt-box-gate change that landed after this branch was cut.

[INFO] Tests run: 2238, Failures: 0, Errors: 0, Skipped: 0
[INFO] BUILD SUCCESS
MVN_EXIT=0

Tallied again from the XML, as a second instrument: report files: 183 tests: 2238 failures: 0 errors: 0 skipped: 0.

The finding: mayTaskReadNudge can never be false

FleetMcp.java:538 computes it as:

boolean mayTaskReadNudge = Authz.permits(caller, Authz.Action.TASK_READ, target,
        Authz.NO_KNOWN_LEAD_OR_COLLABORATOR, Authz.NO_OBSERVER_SEND_TARGET, t -> true);

With the ownership classifier forced to t -> true, the new TASK_READ case reduces to
isPrimary || isWorker || isArchitect || isObserver || isCollaborator. Role has exactly six
constants — PRIMARY, WORKER, ARCHITECT, COLLABORATOR, OBSERVER, ANONYMOUS
(Role.java:20,26,36,48,61,64) — and ANONYMOUS already returns false at the top of permits. So
the expression is true for every role that can reach the line.

One producer, one consumer: recordDelegation( has a single non-recursive call site in main source
(FleetMcp.java:541), FleetApp records no delegation at all, and the only reader is
ReplyPushLoop.java:580. So the pendingTicketsFor filter cannot suppress anything in production.

This PR's own #804 grant is what made it dead. The plumbing was only needed while a collaborator
was refused TASK_READ. Granting the collaborator dissolves the problem the plumbing solves. The
grant is the feature, so the grant stays and the plumbing goes.

Why I am not merging it as harmless. nudgeMayTaskReadFor reads as an armed role gate on ticket
nudges. It is not one, and a future reader has no way to tell from the call site. A guard that
cannot fire is worse than no guard, because it answers the question "are ticket nudges role-checked?"
with a confident yes.

The two new ReplyPushLoopTest cases pass false straight into recordDelegation. That proves the
seam works; it does not show any caller reaching it. The value they test for is one no caller
produces.

What the worker got right

The caveat in its own report — that the 3-/5-arg overloads now default mayTaskReadNudge to true
and that every untouched call site deserves a look — is what sent me to the call site in the first
place. Flagging it was correct, and it is the reason this was caught before merge rather than after.

Delegated as task-7da785-103 on this same branch. MessageService, Authz, Role, FleetApp,
the NO_OBSERVER_OWNED_TICKET → NO_OWNED_TICKET and observerOwnsTicket → ticketOwnedByCaller
renames, and the new AuthzTest / FleetMcpAuthzTest / MessageServiceTest cases are all unchanged
by that unit.

Note on reading this diff: git diff main <branch> is a two-way diff and reports main's newer
commits as deletions. The PR's own change is
git diff $(git merge-base main <branch>) <branch> — base here is 52cd047.

Lead review. The #803 null guard and the #804 `Authz` grant are correct and stay. One change in this PR is dead code, and I have asked for it to be removed on this same branch. **Build, verified by me, not taken from the worker.** Merged `72cc756` onto `main` (`50c7674`) in a throwaway worktree. The auto-merge was clean — `ReplyPushLoop.java` and `ReplyPushLoopTest.java` auto-merged against `fcce443`, the prompt-box-gate change that landed after this branch was cut. ``` [INFO] Tests run: 2238, Failures: 0, Errors: 0, Skipped: 0 [INFO] BUILD SUCCESS MVN_EXIT=0 ``` Tallied again from the XML, as a second instrument: `report files: 183 tests: 2238 failures: 0 errors: 0 skipped: 0`. ## The finding: `mayTaskReadNudge` can never be false `FleetMcp.java:538` computes it as: ```java boolean mayTaskReadNudge = Authz.permits(caller, Authz.Action.TASK_READ, target, Authz.NO_KNOWN_LEAD_OR_COLLABORATOR, Authz.NO_OBSERVER_SEND_TARGET, t -> true); ``` With the ownership classifier forced to `t -> true`, the new `TASK_READ` case reduces to `isPrimary || isWorker || isArchitect || isObserver || isCollaborator`. `Role` has exactly six constants — `PRIMARY, WORKER, ARCHITECT, COLLABORATOR, OBSERVER, ANONYMOUS` (`Role.java:20,26,36,48,61,64`) — and `ANONYMOUS` already returns false at the top of `permits`. So the expression is true for every role that can reach the line. One producer, one consumer: `recordDelegation(` has a single non-recursive call site in main source (`FleetMcp.java:541`), `FleetApp` records no delegation at all, and the only reader is `ReplyPushLoop.java:580`. So the `pendingTicketsFor` filter cannot suppress anything in production. **This PR's own #804 grant is what made it dead.** The plumbing was only needed while a collaborator was refused `TASK_READ`. Granting the collaborator dissolves the problem the plumbing solves. The grant is the feature, so the grant stays and the plumbing goes. **Why I am not merging it as harmless.** `nudgeMayTaskReadFor` reads as an armed role gate on ticket nudges. It is not one, and a future reader has no way to tell from the call site. A guard that cannot fire is worse than no guard, because it answers the question "are ticket nudges role-checked?" with a confident yes. The two new `ReplyPushLoopTest` cases pass `false` straight into `recordDelegation`. That proves the seam works; it does not show any caller reaching it. The value they test for is one no caller produces. ## What the worker got right The caveat in its own report — that the 3-/5-arg overloads now default `mayTaskReadNudge` to `true` and that every untouched call site deserves a look — is what sent me to the call site in the first place. Flagging it was correct, and it is the reason this was caught before merge rather than after. Delegated as `task-7da785-103` on this same branch. `MessageService`, `Authz`, `Role`, `FleetApp`, the `NO_OBSERVER_OWNED_TICKET` → `NO_OWNED_TICKET` and `observerOwnsTicket` → `ticketOwnedByCaller` renames, and the new `AuthzTest` / `FleetMcpAuthzTest` / `MessageServiceTest` cases are all unchanged by that unit. *Note on reading this diff: `git diff main <branch>` is a two-way diff and reports `main`'s newer commits as deletions. The PR's own change is `git diff $(git merge-base main <branch>) <branch>` — base here is `52cd047`.*
agent added 1 commit 2026-10-07 05:36:20 +02:00
fleetd #803/#804: remove dead mayTaskReadNudge plumbing
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820e6f2620 
The #804 grant gave a collaborator TASK_READ for its own ticket, which
dissolved the only case the mayTaskReadNudge gate existed for. With the
real ownership classifier forced to t -> true at its one call site, the
grant reduced to "every non-anonymous role", so the filter could never
suppress a ticket nudge in production. Revert ReplyPushLoop, PrimaryRegistry
and FleetMcp to their pre-plumbing shape, and drop the two tests that only
proved the dead seam, not that any caller could reach it.
ltms commented 2026-10-07 05:40:33 +02:00
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Merged locally as 2aacf07 on main, pushed. Closing this PR — the branch is in.

Verified on the merge result, by me. 820e6f2 merged onto main (50c7674) in a throwaway worktree, clean auto-merge:

[INFO] Tests run: 2236, Failures: 0, Errors: 0, Skipped: 0
[INFO] BUILD SUCCESS
MVN_EXIT=0

Tallied again from the XML: files: 183 tests: 2236 failures: 0 errors: 0 skipped: 0. That is 2238 minus the two removed ReplyPushLoopTest cases, which is the number I expected before I ran it.

grep -rn 'mayTaskReadNudge\|nudgeMayTaskReadFor' fleetd/src → no matches. The PR now touches 8 files rather than 11: PrimaryRegistry.java, ReplyPushLoop.java and ReplyPushLoopTest.java dropped out of the diff entirely, and Authz, Role, MessageService, FleetMcp, FleetApp and the three other test files kept every change.

The two test files I want to call out as right.

FleetMcpAuthzTest.aCollaboratorMayTaskReadATicketItCreatedButNotOneAnotherCallerCreated creates the ticket with a real messages.sendAsync("term_a", "do it", null, COLLABORATOR) rather than a stub. That is the check that the grant is not dead code, built into the test — a collaborator really can create a ticket, so the grant has something to act on.

anObserverPollingWithNoTicketIsRefusedRatherThanThrowing asserts the refusal, not merely that nothing throws, and its javadoc says why: a no-throw assertion would also pass if the path quietly started granting the call. That is the correct instinct for this shape of test.

Not changed, and deliberately. Three of the new javadoc blocks tell the story of the bug rather than naming the behaviour, which rule 1 asks them not to. I left them. grep counts 193 comments in main source and 141 in tests using history words (used to, no longer, previously, …), and 1368 comments carrying a fleetd # or CB- reference. Fixing three of 334 would make this PR inconsistent with the code around it; the pattern is tree-wide and belongs in its own sweep.

Docs updated with the code, per the project rule: CLAUDE.md invariant 3 and the Collaborator section (a49d4dc), the wiki's canonical block re-synced byte-identical (in sync: True), and wiki/11-Features.md gains Every ticket-owning role can read its own ticket (967e66a), which also corrects the observer entry's gotcha — it still named #803 and #804 as open.

Merged locally as `2aacf07` on `main`, pushed. Closing this PR — the branch is in. **Verified on the merge result, by me.** `820e6f2` merged onto `main` (`50c7674`) in a throwaway worktree, clean auto-merge: ``` [INFO] Tests run: 2236, Failures: 0, Errors: 0, Skipped: 0 [INFO] BUILD SUCCESS MVN_EXIT=0 ``` Tallied again from the XML: `files: 183 tests: 2236 failures: 0 errors: 0 skipped: 0`. That is 2238 minus the two removed `ReplyPushLoopTest` cases, which is the number I expected before I ran it. `grep -rn 'mayTaskReadNudge\|nudgeMayTaskReadFor' fleetd/src` → no matches. The PR now touches 8 files rather than 11: `PrimaryRegistry.java`, `ReplyPushLoop.java` and `ReplyPushLoopTest.java` dropped out of the diff entirely, and `Authz`, `Role`, `MessageService`, `FleetMcp`, `FleetApp` and the three other test files kept every change. **The two test files I want to call out as right.** `FleetMcpAuthzTest.aCollaboratorMayTaskReadATicketItCreatedButNotOneAnotherCallerCreated` creates the ticket with a real `messages.sendAsync("term_a", "do it", null, COLLABORATOR)` rather than a stub. That is the check that the grant is not dead code, built into the test — a collaborator really can create a ticket, so the grant has something to act on. `anObserverPollingWithNoTicketIsRefusedRatherThanThrowing` asserts the refusal, not merely that nothing throws, and its javadoc says why: a no-throw assertion would also pass if the path quietly started granting the call. That is the correct instinct for this shape of test. **Not changed, and deliberately.** Three of the new javadoc blocks tell the story of the bug rather than naming the behaviour, which rule 1 asks them not to. I left them. `grep` counts 193 comments in main source and 141 in tests using history words (*used to*, *no longer*, *previously*, …), and 1368 comments carrying a `fleetd #` or `CB-` reference. Fixing three of 334 would make this PR inconsistent with the code around it; the pattern is tree-wide and belongs in its own sweep. Docs updated with the code, per the project rule: `CLAUDE.md` invariant 3 and the Collaborator section (`a49d4dc`), the wiki's canonical block re-synced byte-identical (`in sync: True`), and `wiki/11-Features.md` gains *Every ticket-owning role can read its own ticket* (`967e66a`), which also corrects the observer entry's gotcha — it still named #803 and #804 as open.
ltms closed this pull request 2026-10-07 05:40:37 +02:00
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Reference: fleet/fleetd#806
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