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Dai Ha bf2d940c26 fleetd #669: fix fleetd.example.yaml's false scan-exclusion claims; cover the shipped shape
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fleetd.example.yaml claimed member spaces are excluded from the lead-tab scan and that
a lead's workspace default is "leads" and must not match a member workspace. Both are
false: production always passes an empty excludedWorkspaceLabels set (CB-558), and a
lead's workspace defaults to the same shared "fleet" space the members use. Rewrite
both paragraphs to name the defenses that actually exist: the startup tabPrefix refusal
and CallerResolver's roster-first precedence.

Add the test nobody wrote: a lead is still discovered when its workspace label equals
the member workspace, with an empty exclusion set. Correct
aTabInAWorkerSpaceIsNeverALeadEvenWhenItsLabelMatches's javadoc, which overclaimed that
the excludedWorkspaceLabels parameter is the live production guard. Drop the stale line
number from FleetdAssemblyLeadTabScannerExclusionTest's assertion message and javadoc.
2026-10-04 06:31:20 +02:00
7 changed files with 49 additions and 212 deletions
+10 -8
View File
@@ -62,11 +62,12 @@ bind:
#
# 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 fleetd 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.
# Two things stop the tab-name convention from becoming a way to claim leadership: 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; and the CallerResolver asks the live
# spawned-member roster BEFORE any tab map, so a live member is never mistaken for a lead no matter
# what its tab says. 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 fleet_send driving it) past the quiet period. The fleet is one lead + architects +
@@ -659,9 +660,10 @@ fleet:
# tabPrefix: "lead:" # only used to guard against a worker tabLabel colliding with
# # this convention at startup; plays no part in matching a lead
# 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.
# workspace: leads # where a launched lead's tab is created (default "fleet",
# # the same shared space the members use). Sharing that space
# # with members is the normal shipped shape: the scanner tells
# # a lead from a member by the exact tab label, not by workspace.
# cwd: /path/to/repo # the launched lead's working directory (default: fleetd's own)
# kind: claude # descriptive; reported by fleet_whoami
# gpt-sol-5.6:
@@ -560,7 +560,6 @@ public final class FleetMcp {
return listFleet(workers, sessions, messages, capacity, healthCoverage, loopHealth, quarantine, outage,
leadSeats, leadContextGauge, leadConfigDirs, callers.leads(),
callerTerminal(exchange),
callers.collaborators(), collaboratorsVisibleTo(principal(exchange)),
new CoordinationSource(leadChannel, peers),
coordinatorVisibleTo(principal(exchange)));
};
@@ -744,21 +743,6 @@ public final class FleetMcp {
return caller.isPrimary();
}
/**
* fleetd #703: who may see {@code fleet_list}'s {@code collaborators} array — a roster of the
* human-opened tabs this daemon recognises as named peers. Visible to exactly the roles that
* may {@link Authz.Action#SEND} to a named peer ({@code Authz.java}'s {@code SEND} case):
* the primary, an architect, and a collaborator (reaching another collaborator or a lead). A
* worker holds {@code READ} but can never {@code SEND} to a collaborator, so listing them to a
* worker would expose which human tabs exist on the host with no use to that caller. Split out
* for the same reason as {@link #coordinatorVisibleTo}: the decision must be unit-testable
* without fabricating an SDK {@code McpSyncServerExchange}, and the handler must call this
* named predicate rather than inlining the check.
*/
static boolean collaboratorsVisibleTo(Principal caller) {
return caller.isPrimary() || caller.isArchitect() || caller.isCollaborator();
}
/** 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);
@@ -1777,8 +1761,7 @@ public final class FleetMcp {
Map<String, String> leads, String selfTerm,
CoordinationSource coordination) {
return listFleet(workers, sessions, messages, capacity, healthCoverage, loopHealth, quarantine,
OutageSource.none(), LeadSeatSource.none(), new LeadContextGauge(), LeadConfigDirSource.none(), leads, selfTerm,
Map.of(), false, coordination, false);
OutageSource.none(), LeadSeatSource.none(), new LeadContextGauge(), LeadConfigDirSource.none(), leads, selfTerm, coordination, false);
}
/** As above, plus fleetd #201 Unit 5 cool-off facts (see {@link OutageSource}). */
@@ -1787,8 +1770,7 @@ public final class FleetMcp {
QuarantineSource quarantine, OutageSource outage,
Map<String, String> leads, String selfTerm) {
return listFleet(workers, sessions, messages, capacity, healthCoverage, LoopHealthSource.none(), quarantine, outage,
LeadSeatSource.none(), new LeadContextGauge(), LeadConfigDirSource.none(), leads, selfTerm,
Map.of(), false, CoordinationSource.none(), false);
LeadSeatSource.none(), new LeadContextGauge(), LeadConfigDirSource.none(), leads, selfTerm, CoordinationSource.none(), false);
}
/**
@@ -1805,8 +1787,7 @@ public final class FleetMcp {
QuarantineSource quarantine, Map<String, String> leads, String selfTerm,
CoordinationSource coordination) {
return listFleet(workers, sessions, messages, capacity, healthCoverage, LoopHealthSource.none(), quarantine, OutageSource.none(),
LeadSeatSource.none(), new LeadContextGauge(), LeadConfigDirSource.none(), leads, selfTerm,
Map.of(), false, coordination, false);
LeadSeatSource.none(), new LeadContextGauge(), LeadConfigDirSource.none(), leads, selfTerm, coordination, false);
}
/** As above, plus fleetd #201 Unit 5 cool-off facts (see {@link OutageSource}). */
@@ -1815,8 +1796,7 @@ public final class FleetMcp {
QuarantineSource quarantine, OutageSource outage,
Map<String, String> leads, String selfTerm, CoordinationSource coordination) {
return listFleet(workers, sessions, messages, capacity, healthCoverage, LoopHealthSource.none(), quarantine, outage,
LeadSeatSource.none(), new LeadContextGauge(), LeadConfigDirSource.none(), leads, selfTerm,
Map.of(), false, coordination, false);
LeadSeatSource.none(), new LeadContextGauge(), LeadConfigDirSource.none(), leads, selfTerm, coordination, false);
}
/**
@@ -1838,8 +1818,7 @@ public final class FleetMcp {
LeadSeatSource leadSeats, Map<String, String> leads, String selfTerm,
CoordinationSource coordination) {
return listFleet(workers, sessions, messages, capacity, healthCoverage, LoopHealthSource.none(), quarantine, outage,
leadSeats, new LeadContextGauge(), LeadConfigDirSource.none(), leads, selfTerm,
Map.of(), false, coordination, false);
leadSeats, new LeadContextGauge(), LeadConfigDirSource.none(), leads, selfTerm, coordination, false);
}
/**
@@ -1863,8 +1842,7 @@ public final class FleetMcp {
LeadSeatSource leadSeats, Map<String, String> leads, String selfTerm,
CoordinationSource coordination, boolean callerIsPrimary) {
return listFleet(workers, sessions, messages, capacity, healthCoverage, LoopHealthSource.none(), quarantine,
outage, leadSeats, new LeadContextGauge(), LeadConfigDirSource.none(), leads, selfTerm,
Map.of(), false, coordination, callerIsPrimary);
outage, leadSeats, new LeadContextGauge(), LeadConfigDirSource.none(), leads, selfTerm, coordination, callerIsPrimary);
}
/**
@@ -1874,13 +1852,6 @@ public final class FleetMcp {
* matter); the one caller that matters for caching, {@code fleet_list}'s MCP handler, passes
* its own single long-lived instance instead (see {@code FleetMcp}'s {@code leadContextGauge}
* field).
*
* @param collaborators terminal_id → collaborator name, live from the resolver
* ({@link dev.ltms.fleet.auth.CallerResolver#collaborators()})
* @param collaboratorsVisible whether this caller may see the {@code collaborators} array (see
* {@link #collaboratorsVisibleTo}); every wrapper overload above
* passes {@code false}, so a test that wants the row must call this
* overload with an explicit {@code true}
*/
static McpSchema.CallToolResult listFleet(PeerLauncher workers, SessionManager sessions, MessageService messages,
CapacitySource capacity, HealthCoverageSource healthCoverage,
@@ -1889,7 +1860,6 @@ public final class FleetMcp {
LeadSeatSource leadSeats, LeadContextGauge contextGauge,
LeadConfigDirSource leadConfigDirs,
Map<String, String> leads, String selfTerm,
Map<String, String> collaborators, boolean collaboratorsVisible,
CoordinationSource coordination, boolean callerIsPrimary) {
try {
Map<String, Agent> live = workers.list().stream()
@@ -1916,16 +1886,6 @@ public final class FleetMcp {
result.put("loopHealth", Map.of(
"statusPoller", loopHealth.statusPoller().get().name(),
"sessionReaper", loopHealth.sessionReaper().get().name()));
// fleetd #703: a collaborator tab is a person's own tab, so the row is assembled and
// included only for the roles that may SEND to a named peer -- gate BEFORE assembling
// it, same reason as the coordinator row just below: the key must be absent for a
// worker, never present-and-empty.
if (collaboratorsVisible) {
result.put("collaborators", collaborators.entrySet().stream()
.sorted(Map.Entry.comparingByValue())
.map(e -> collaboratorRow(e.getKey(), e.getValue()))
.toList());
}
// fleetd #439: coordinator/coordinatorView is lead-to-lead coordination state and must
// never reach a worker or an architect -- gate BEFORE assembling it, not after, so the
// key is absent rather than present-and-empty.
@@ -2237,20 +2197,6 @@ public final class FleetMcp {
return m;
}
/**
* fleetd #703: one row of the {@code collaborators} array — a named peer's registry name and
* the herdr {@code terminal_id} a {@code fleet_send} must target to reach it. No status, no
* context gauge, no profile: a collaborator is never spawned and carries no profile, so those
* fields have no meaning for it, and the scan behind {@code terminal} only reports a tab it
* actually found in herdr, so a tab nobody has open does not appear here at all.
*/
private static Map<String, Object> collaboratorRow(String terminal, String name) {
Map<String, Object> m = new LinkedHashMap<>();
m.put("name", name);
m.put("sessionId", terminal);
return m;
}
/**
* Reads the lead context gauge for one lead. {@code configDir} is this lead's configured
* {@code CLAUDE_CONFIG_DIR} override (see {@link LeadConfigDirSource}), derived from
@@ -2476,12 +2422,7 @@ public final class FleetMcp {
+ "msgId/from/preview, never the full body), and one row per coordinator.peers "
+ "coord-id ('peers': coordId/reachable, plus pending/consumers when reachable) — "
+ "this is peer DISCOVERY for cross-host leads, distinct from the local 'leads' "
+ "array above. It is omitted entirely when no coordinator is configured. A "
+ "'collaborators' array, visible only to the primary, an architect, and a "
+ "collaborator (never a worker), reports every other named peer tab this daemon "
+ "recognises: each row is 'name' (its registry name) and 'sessionId' (the "
+ "terminal id a fleet_send targets to reach it). Absent entirely for a worker, "
+ "whatever is configured.",
+ "array above. It is omitted entirely when no coordinator is configured.",
objectSchema(Map.of(), List.of()));
}
@@ -31,8 +31,7 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
/**
* fleetd #670 — pins the {@code excludedWorkspaceLabels} argument {@link FleetdAssembly}'s
* production boot path passes to {@link LeadTabScanner} at {@code FleetdAssembly.java:265}
* ({@code Set.of()}).
* production boot path passes to {@link LeadTabScanner} ({@code Set.of()}).
*
* <p>{@code LeadTabScannerTest} already covers this constructor parameter, but it builds its own
* {@link LeadTabScanner} with its own set, so it tests the seam and proves nothing about the
@@ -191,7 +190,7 @@ class FleetdAssemblyLeadTabScannerExclusionTest {
Set<?> excluded = (Set<?>) excludedField.get(leads);
assertTrue(excluded.isEmpty(),
"FleetdAssembly.java:265 must pass an empty excludedWorkspaceLabels to "
"FleetdAssembly must pass an empty excludedWorkspaceLabels to "
+ "LeadTabScanner — scanning member tabs would demote the lead to a worker");
} finally {
assertNotNull(ports.shutdownHook, "control: assembly must capture its shutdown hook");
@@ -205,9 +205,12 @@ class LeadTabScannerTest {
}
/**
* The guard that matters: fleetd 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.
* Covers the {@code excludedWorkspaceLabels} parameter: a tab in an excluded workspace is never
* matched, whatever its label. Production always constructs this class with an empty set (CB-558,
* {@code FleetdAssembly}), so this parameter plays no part in the live guard against a worker
* tab being mistaken for a lead — that guard is {@code CallerResolver} asking the live
* spawned-member roster before any tab map. This test exists because the parameter still exists
* and is worth covering on its own terms.
*/
@Test
void aTabInAWorkerSpaceIsNeverALeadEvenWhenItsLabelMatches() {
@@ -219,6 +222,29 @@ class LeadTabScannerTest {
assertFalse(scanner(herdr, tabToName, new AtomicLong()).get().containsKey("term_impostor"));
}
/**
* The shipped shape (CB-558, {@code FleetdAssembly}): production always constructs this class
* with an empty {@code excludedWorkspaceLabels}, and a lead's {@code workspace:} default is the
* same shared {@code "fleet"} space the members use. A lead tab is still found when it sits in
* the exact same workspace as a member-labelled tab — the scanner tells them apart by the exact
* tab label, not by which workspace either one is in.
*/
@Test
void aLeadIsDiscoveredWhenItsWorkspaceIsTheSameAsTheMemberWorkspace() {
TopologyHerdr herdr = new TopologyHerdr()
.workspace("w1", "fleet")
.tab("w1:t1", "w1", "lead: opus-5.0")
.tab("w1:t2", "w1", "worker: gx10 #1")
.pane("w1:p1", "w1:t1", "term_opus")
.pane("w1:p2", "w1:t2", "term_worker");
LeadTabScanner s = new LeadTabScanner(herdr, Map.of("lead: opus-5.0", "opus-5.0"),
Set.of(), TTL, new AtomicLong()::get);
assertEquals("opus-5.0", s.get().get("term_opus"),
"a lead sharing the members' workspace is still discovered — the label, not the "
+ "workspace, is what matches it");
}
@Test
void aLabelWithNoConfiguredEntryIsIgnored() {
TopologyHerdr herdr = new TopologyHerdr().workspace("w1", "main")
@@ -366,58 +366,6 @@ class FleetMcpAuthzTest {
+ "calling, not pass a literal boolean -- found: " + trailing);
}
// --- fleetd #703: who may see fleet_list's collaborators array -------------------------------
/**
* fleetd #703: {@link FleetMcp#collaboratorsVisibleTo} is the whole policy decision for
* {@code fleet_list}'s {@code collaborators} array. Visible to exactly the roles that may
* {@code SEND} to a named peer -- the primary, an architect, and a collaborator itself -- never
* a worker, which holds {@code READ} but can never {@code SEND} to a collaborator, and never an
* anonymous caller.
*/
@Test
void onlyPrimaryArchitectAndCollaboratorMaySeeTheCollaboratorsArray() {
assertTrue(FleetMcp.collaboratorsVisibleTo(PRIMARY), "the primary must see the collaborators array");
assertTrue(FleetMcp.collaboratorsVisibleTo(ARCH_DESIGN), "an architect must see the collaborators array");
assertTrue(FleetMcp.collaboratorsVisibleTo(COLLABORATOR), "a collaborator must see its own peer roster");
assertFalse(FleetMcp.collaboratorsVisibleTo(WORKER_A),
"a worker holds READ but can never SEND to a collaborator, so it must not see the array");
assertFalse(FleetMcp.collaboratorsVisibleTo(ANON), "authenticated as nothing must not see it either");
}
/**
* fleetd #703, same reasoning as {@link #theFleetListHandlerActuallyConsultsCoordinatorVisibleTo}:
* the predicate above can be perfectly correct while the one production call site never asks it.
* This reads {@code FleetMcp.java}'s own source and asserts the {@code fleet_list} handler's
* {@code listFleet(...)} call both threads {@code callers.collaborators()} into the payload and
* asks {@code collaboratorsVisibleTo(principal(exchange))} for the visibility flag, rather than a
* literal boolean or an empty map.
*/
@Test
void theFleetListHandlerActuallyConsultsCollaboratorsVisibleTo() throws Exception {
String source = Files.readString(MCP_SOURCE);
int start = source.indexOf("listHandler =");
assertTrue(start >= 0, "could not find the fleet_list handler (listHandler) in " + MCP_SOURCE
+ " -- the scrape has stopped matching, fix the anchor before trusting this test");
int end = source.indexOf("stopHandler =", start);
assertTrue(end > start, "could not find the handler declared after listHandler to bound the scrape");
String handlerBlock = source.substring(start, end);
// CONTROL: the block we scraped really does contain a call to listFleet(...) -- if this
// fails, the anchors above moved and the assertions below would otherwise pass on nothing.
assertTrue(handlerBlock.contains("listFleet("),
"control failed: the scraped listHandler block contains no listFleet( call at all -- "
+ "the anchors have drifted, this test is not testing what it claims to");
assertTrue(handlerBlock.contains("callers.collaborators()"),
"the fleet_list handler must thread callers.collaborators() into listFleet(...), not an "
+ "empty or literal map -- block: " + handlerBlock);
assertTrue(handlerBlock.contains("collaboratorsVisibleTo(principal(exchange))"),
"the fleet_list handler must ask collaboratorsVisibleTo(principal(exchange)) who is "
+ "calling, not pass a literal boolean -- block: " + handlerBlock);
}
// --- which action each tool hands the gate (fleetd #272) ------------------------------------
/**
@@ -121,7 +121,6 @@ class FleetMcpLeadContextGaugeWiringTest {
FleetMcp.CapacitySource.none(), new FleetMcp.HealthCoverageSource(() -> "off"),
FleetMcp.LoopHealthSource.none(), FleetMcp.QuarantineSource.none(), FleetMcp.OutageSource.none(),
FleetMcp.LeadSeatSource.none(), contextGauge, leadConfigDirs,
Map.of(LEAD_TERMINAL, LEAD_NAME), LEAD_TERMINAL, Map.of(), false,
FleetMcp.CoordinationSource.none(), false);
Map.of(LEAD_TERMINAL, LEAD_NAME), LEAD_TERMINAL, FleetMcp.CoordinationSource.none(), false);
}
}
@@ -10,7 +10,6 @@ import dev.ltms.fleet.herdr.AgentControl;
import dev.ltms.fleet.herdr.AgentStatus;
import dev.ltms.fleet.herdr.FakeHerdr;
import dev.ltms.fleet.inject.LoopWatchdog;
import dev.ltms.fleet.lead.LeadContextGauge;
import dev.ltms.fleet.herdr.PaneLocator;
import dev.ltms.fleet.herdr.WorkspaceControl;
import dev.ltms.fleet.inject.Injector;
@@ -880,83 +879,6 @@ class FleetMcpTest {
assertTrue(out.contains("x".repeat(80) + "…"), "expected an 80-char preview with an ellipsis: " + out);
}
// --- fleetd #703: fleet_list's collaborators array -------------------------------------------
/** Calls the canonical {@code listFleet} overload directly, so a test can set the collaborators
* payload and its visibility independently of a real {@code Principal} / MCP exchange. */
private static McpSchema.CallToolResult listFleetWithCollaborators(FakeHerdr h,
Map<String, String> collaborators, boolean collaboratorsVisible) {
SessionManager sessions = new SessionManager(workerService(h, "http://gx00.gw:8000", Set.of("gx00.gw")));
return FleetMcp.listFleet(
workerService(h, "http://gx00.gw:8000", Set.of("gx00.gw")), sessions, null,
FleetMcp.CapacitySource.none(), new FleetMcp.HealthCoverageSource(() -> "off"),
FleetMcp.LoopHealthSource.none(), FleetMcp.QuarantineSource.none(), FleetMcp.OutageSource.none(),
FleetMcp.LeadSeatSource.none(), new LeadContextGauge(), FleetMcp.LeadConfigDirSource.none(),
Map.of(), "", collaborators, collaboratorsVisible,
FleetMcp.CoordinationSource.none(), false);
}
/**
* fleetd #703 acceptance A: a visible caller with one configured collaborator gets a
* {@code collaborators} row whose key ({@code CallerResolver.collaborators()}'s
* {@code terminal_id -> name} entry) lands as that row's {@code sessionId}, and {@code leads}/
* {@code members} are unaffected by the new key.
*/
@Test
void listReportsACollaboratorsRowKeyedByTheCollaboratorsTerminalId() {
FakeHerdr h = new FakeHerdr();
String out = textOf(listFleetWithCollaborators(h, Map.of("term_collab", "ops"), true));
assertTrue(out.contains("\"collaborators\":["), out);
assertTrue(out.contains("\"name\":\"ops\""), out);
assertTrue(out.contains("\"sessionId\":\"term_collab\""), out);
assertTrue(out.contains("\"leads\":[]"), out);
assertTrue(out.contains("\"members\":[]"), out);
}
/**
* fleetd #703 acceptance A, control half: with no collaborator configured, the key is absent
* (caller cannot see it) or an empty array (caller can), and {@code leads}/{@code members} are
* unchanged either way.
*/
@Test
void listOmitsOrEmptiesCollaboratorsWhenNoneAreConfigured() {
FakeHerdr h = new FakeHerdr();
String visibleButEmpty = textOf(listFleetWithCollaborators(h, Map.of(), true));
assertTrue(visibleButEmpty.contains("\"collaborators\":[]"), visibleButEmpty);
assertTrue(visibleButEmpty.contains("\"leads\":[]"), visibleButEmpty);
assertTrue(visibleButEmpty.contains("\"members\":[]"), visibleButEmpty);
String notVisible = textOf(listFleetWithCollaborators(h, Map.of(), false));
assertFalse(notVisible.contains("\"collaborators\""), notVisible);
assertTrue(notVisible.contains("\"leads\":[]"), notVisible);
assertTrue(notVisible.contains("\"members\":[]"), notVisible);
}
/**
* fleetd #703 acceptance B: a worker must not see the {@code collaborators} array at all, while
* an architect -- a role that also holds READ, same as a worker -- does see it. Both halves are
* asserted: a test that only checked the worker-hidden half would pass even if the feature were
* never wired up for anyone.
*/
@Test
void listOmitsCollaboratorsForAWorkerAndIncludesThemForAnArchitect() {
FakeHerdr h = new FakeHerdr();
Map<String, String> collaborators = Map.of("term_collab", "ops");
String asWorker = textOf(listFleetWithCollaborators(h, collaborators,
FleetMcp.collaboratorsVisibleTo(Principal.worker("term_w", 1))));
assertFalse(asWorker.contains("\"collaborators\""),
"a worker must not see the collaborators array: " + asWorker);
String asArchitect = textOf(listFleetWithCollaborators(h, collaborators,
FleetMcp.collaboratorsVisibleTo(Principal.architect("design", "term_arch", 2))));
assertTrue(asArchitect.contains("\"collaborators\":["),
"an architect must see the collaborators array: " + asArchitect);
assertTrue(asArchitect.contains("\"sessionId\":\"term_collab\""), asArchitect);
}
/**
* fleetd #421: {@code mailbox.pending} counts only broker-ready messages, so a blocked lead's
* normal, healthy state is {@code "pending": 0} next to a non-empty {@code held[]} — which