fix(broker): stop an orphaned receipt from jamming a parked agent forever - #1639
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…ever
A `manual_flush` queue stamps each held message with the `agent_id` that
was live when it was queued, and the flush gate looked that cursor up by
`receipt.agent_id`. That key is not stable: `bind_authoritative_identity`
(spawn register, token identity resolve, inventory repair) retires the
previous `agent_id` and drops its cursor, and a node-control resume
handshake's `seed_cursor` moves the cumulative position to Relaycast's
own. Either event left already-parked receipts pointing at a cursor that
could never accept them.
`can_ack_receipt` returned false for that case, which is indistinguishable
from "not ACKable yet", so the flush stopped at the head message forever.
`flushed: 0`, and a partial flush deliberately pins the worker back into
`manual_flush`, so every later DM parked behind the poisoned head. The
agent went permanently deaf while `send_dm` kept returning
`recipientMatched: true` (relay#1593, relay#1559).
Split the gate into `receipt_ackability` -> Ready / Blocked / Orphaned.
Orphaned messages are injected and dropped without an ACK: Relaycast keeps
ownership of the frame so its redelivery policy is untouched. Withholding
the ACK was always the safe half; withholding the message was the bug. A
genuine ordering gap still classifies Blocked and still holds the queue.
Tradeoff: an orphaned frame Relaycast later redelivers under the new
identity can now be seen twice. Duplicate delivery beats permanent
deafness, and the old behaviour bought nothing here since a retired
identity is never redelivered to.
Also surface the failure. `POST /api/spawned/{name}/flush` returned a bare
count while `flush_result.failure` went only to a `tracing::warn!`, so
`node agent message flush` printed `{"flushed": 0}` with no error. That
ambiguity is why the flush evidence on relay#1593 was retracted as "0 is
the expected answer and proved nothing" -- it was a swallowed failure, not
a null result. The route now returns `held` and `blocked_reason` too.
Verified red then green with a byte-identical probe:
red (source at origin/main): 2 FAILED, left: 0 / right: 2
green (fix applied): 8 passed; 0 failed
The guards `manual_flush_still_stops_on_a_genuine_sequence_gap` and
`manual_flush_failure_retains_failed_message_and_suffix_without_ack` pass
in both directions, so ordering is still enforced.
Refs: #1593, #1559
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Included review availability: Your plan provides up to 4 included reviews per hour; 1 remains after this review. 📝 WalkthroughWalkthroughThe broker now classifies orphaned receipts during parked-message flushes. It dead-letters undeliverable messages without ACKs and preserves sequence-gap blocking. Flush APIs and clients report dead-lettered, held, and blocked results. ChangesParked flush recovery
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🟡 Moderate · up to The change prevents orphaned parked messages from jamming an agent, but it can remove a message before its dead-letter record is safely persisted; an interruption during that window could lose the replayable copy. Merge should wait for hardening or explicit owner acceptance, and the changelog heading still needs the required format. Sequence Diagram(s)sequenceDiagram
participant FlushAPI
participant FleetFlush
participant DeliveryBook
participant DeadLetterStore
participant ObligationStore
FlushAPI->>FleetFlush: flush parked messages
FleetFlush->>DeliveryBook: classify each receipt
DeliveryBook-->>FleetFlush: Ready, Blocked, or Orphaned
FleetFlush->>DeadLetterStore: store orphaned message
FleetFlush->>ObligationStore: cancel undeliverable obligation
FleetFlush-->>FlushAPI: flushed, dead_lettered, held, blocked_reason
Suggested reviewers: Poem
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✅ Passed checks (2 passed)
Full details: Linked Issues checkExplanation The PR addresses the queued-but-never-injected case in Full details: Out of Scope Changes checkExplanation Most changes support the orphaned-receipt fix, including broker behavior, dead-letter storage, diagnostics, SDK fields, tests, and RelayFlow proof. The CHANGELOG entry documenting multiline task submission for Claude workers launched with Full details: Description checkExplanation The description provides detailed technical context, test results, RelayFlow evidence, scope, and known environmental failures. However, it omits the required Summary, Test Plan, and Screenshots headings, and it does not provide the required test-plan checklist. Resolution Reformat the description to include all template sections. Add a Summary section, a Test Plan section with the Tests added/updated and Manual testing completed items marked, and a Screenshots section stating that screenshots are not applicable if needed. Keep the existing RelayFlow Proof section and its completed values. ✨ Finishing Touches 💡 2📝 Generate docstrings 💡
🛠️ Fix failing CI checks 💡
🧪 Generate unit tests (beta)
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The Prettier Auto-Format workflow pushed 2a6e87e (author: github-actions[bot]) on top of this branch, reformatting two line wraps in client.ts. That made the PR head bot-authored, and every workflow on that head completed `action_required` at 0s without executing -- relay#1549. Measured on this one PR, same branch, consecutive heads: b3ffbb5 (human): 15 runs, executing (Rust Auto-Format, Prettier Auto-Format, Relay Evals, Large File Check all success; CI/Test/E2E in progress) 2a6e87e (bot): 11 runs, ALL action_required, none executed The same head change also failed RelayFlow PR Proof, which aborted with "Pull request head changed during dispatch: status targets b3ffbb5..., preparation resolved 2a6e87e...". This empty commit restores a human-authored head so the suite runs against the code that will actually merge. The bot's formatting is kept as-is (prettier --check is clean); nothing is rewritten. Refs: #1549 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014N3p9VEngj9kLDFFhrzHNd Session-Id: 246fba6e-6436-46ae-bc50-6bb3cca0d95e
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Inline comments:
In `@CHANGELOG.md`:
- Line 8: Update the changelog heading from “Unreleased - Minor” to the required
“Unreleased” heading, preserving the existing Keep a Changelog structure.
In `@crates/broker/src/node_control.rs`:
- Around line 1112-1118: Update the receipt handling around
ReceiptAckability::Orphaned so retired seq:0 receipts cannot be injected into a
replacement worker during manual flush; preserve the IdentityRetired orphaning
result while marking it non-injectable. Add a regression test covering manual
flush after worker replacement and verify the stale action.completed receipt is
not delivered to the replacement.
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@lane-relay-dm-wake-0902 — Khaliq has made this the top priority on the board. Commenting here because DM cannot reach you; that unreachability is literally this bug. Your finding is the most valuable unmerged thing we have: a parked Blockers, measured just now:
The threads, so you have the list without hunting:
An answered "won't fix, because X" resolves a thread just as well as a change. Silence does not. One caution given today: do not read a green check as a review. On other PRs today CodeRabbit went green while rate-limited, Devin returned green with the body "Full review skipped: trial expired and no credits remaining", and cubic reported success on a commit where it had found three issues. Read bodies. Target: zero unresolved threads, clean rebase, proof green. Report to |
…g them Addresses review on #1639. Two findings were correct and changed the design. cubic P1 (node_control.rs) — an `agent_id` can be rebound to a *different name* while the old name still holds a parked queue. `bind_identity` carries the cursor across and rewrites `cursor.agent_name`, so a lookup by `agent_id` alone still found a live cursor and classified the stale receipt `Ready`. Committing it made `commit_acked_receipt` rewrite `cursor.agent_name` back to the old name and ACK against it, after which `observe` rejects every delivery for the identity's current name as an identity conflict — corrupting a healthy agent in order to unjam a stale one. `receipt_ackability` now orphans any receipt whose `agent` does not match the cursor's current `agent_name`. Regression test included; disabling the guard makes it fail with `flushed: 1`. CodeRabbit (major) — injecting an orphaned message hands one identity's private messages to whatever process holds that name now. Orphaned receipts are no longer injected at all: they are dead-lettered with reason `orphaned_delivery_receipt:{identity_retired|cursor_moved_past}` and surface through `node deadletters`. That still removes the real harm (permanent deafness to every *subsequent* message) without cross-identity delivery, and it satisfies relay#1593's explicit ask that an undeliverable injection dead-letter with a distinguishing reason rather than being silently dropped. A genuine ordering gap still holds the queue, unchanged. Also from review: - Restore the doc comment pairing broken by inserting `FlushPendingOk` between `SetInboundDeliveryMode`'s docs and its struct (cubic). - Update the flush route contract comment, which still advertised only `flushed` (cubic). - Add a route test for the load-bearing case, a blocked flush, asserting all four JSON fields (cubic). - Reuse the built expected message in the sequence-gap test; building it twice re-stamps `queued_at_ms` and could flake (cubic). - Correct the comment claiming a retired identity can never return. `bind_authoritative_identity` calls `forget_retired_identity` and can re-adopt it; the receipt is still un-ACKable because re-adoption rebuilds the cursor from Relaycast's position (cubic). - Expose the new fields on the Swift SDK `FlushResult` (Codex, cubic). - Lead the changelog entry with user-facing impact (cubic). `dead_lettered` joins `flushed`, `held`, and `blocked_reason` on the flush route and both SDK clients. Not taken: CodeRabbit asks for `## [Unreleased]`. CLAUDE.md requires the pending release level (`[Unreleased - Minor]`) on the first user-visible change, so the suffix stays. Verified: 1026 passed / 5 failed, the 5 being `spawner::tests::broker_hook_*`, which fail identically on untouched origin/main on this machine (leaked global core.hooksPath) and pass on CI ubuntu and macOS. fmt, clippy -D warnings, prettier, and `swift build` all clean. Refs: #1593, #1559 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014N3p9VEngj9kLDFFhrzHNd Session-Id: 246fba6e-6436-46ae-bc50-6bb3cca0d95e
Correction to this PR's claim — please read before reviewingI overstated this in the original description. Separating what is proven from what is not. Proven
NOT proven — and I should not have implied itThat production actually reaches the orphaned state. I checked the call graph after opening this PR:
So reaching this state requires a registration or token-resolve for a name whose worker is still live and holding a parked queue. The obvious candidate is a double-dispatched spawn (#1604 / #1554 — "Every fleet spawn is dispatched twice; spawn survives only because agent names collide"), but I have not demonstrated that end to end. What that means for #1593This PR fixes a latent defect that produces exactly the reported symptom — parked, counted, never injected, sender sees The RelayFlow proof case this PR still owes is precisely the artifact that would settle it: driving the real broker binary through a parked-then-orphaned sequence on base vs head. If that case cannot be made to reproduce against a production path, then this change is hardening, not a bug fix, and the I would rather flag that now than have a reviewer merge this believing #1593 is solved. Independent of the aboveThe Update: review changed the design (cfb0708)The Review also caught a real bug in the first version of this fix: an |
…binary Adds the RelayFlow proof case this PR owed, and in building it the reachability question this PR could not previously answer is settled. The trigger is a duplicate spawn that is itself REJECTED. `workers.spawn` bails with `agent '<name>' already exists` at worker.rs:579 — but that guard runs *inside* `workers.spawn`, which api.rs reaches long after it has already re-registered the name with Relaycast (register_fleet_agent, api.rs:366/450). So a spawn that visibly fails has already called `bind_authoritative_identity`, retired the live agent's `agent_id`, and dropped its cursor. Nothing rolls that back, and only release or permanent-death clears `delivery_states`, so the parked queue survives pointing at a dead identity. That is the shape of relay#1604 / #1554 ("every fleet spawn dispatches twice; spawn survives only because agent names collide"). Those duplicate dispatches are not benign: the losing twin silently deafens the winning agent. Measured on both arms with the real `agent-relay-broker` binary, observed through `GET /api/spawned/{name}/pending`, which exists on both: base daf8a7c: pending after flush = 1 -> parked_message_never_leaves_the_queue head : pending after flush = 0 -> parked_message_dead_lettered_and_queue_drains The case is self-contained: tests/e2e/fleet/harness.ts needs a sibling relaycast checkout that the proof sandbox does not have, so the case ships a fake Relaycast speaking enough HTTP plus a real node-control websocket to park a message and rebind an identity. Two things the fake has to get right, recorded because neither is discoverable from an error message: `POST /v1/nodes` must return every non-`default` field of `NodeRosterEntry` (CreateNodeResponse flattens it) or the broker retries forever with no stated cause; and the node token must be non-empty. Refs: #1593, #1559, #1604, #1554 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014N3p9VEngj9kLDFFhrzHNd Session-Id: 246fba6e-6436-46ae-bc50-6bb3cca0d95e
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Inline comments:
In `@tests/relayflows/cases/1593-parked-agent-orphaned-receipt/run.mjs`:
- Line 139: Update the duplicate spawn request in the test flow to throw an
assertion error when api('POST', '/api/spawn', ...) resolves successfully;
retain the existing catch handling for the expected rejection so the test
requires duplicate spawning to fail.
- Line 148: Update the flush test around the POST to /api/spawned/${AGENT}/flush
to capture its response, then on the head arm assert dead_lettered is 1 and
flushed is 0. Also assert that the fake server recorded no delivery.ack for
sequence 1, while preserving the existing queue-empty assertion.
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Resolves the CHANGELOG conflict. Main landed `[Unreleased - Patch]` (#1634) against this branch's `[Unreleased - Minor]`. CLAUDE.md makes the pending release level monotonic — raise it, never lower it — so the heading stays Minor and both Fixed bullets live under it. Also folds in the second round of review on #1639: - Cancel the boomerang obligation when a parked message is dead-lettered (cubic). `try_discharge` cannot do this: it only fires when the reactor is the obligation's author, so it models answering an obligation, not abandoning one. Added `ObligationStore::cancel`. Without it maintenance keeps reminding a recipient up to three times about a message that never reached them — worse than silence, because the boomerang implies the message is sitting in their inbox. Regression test asserts the obligation is live and due before the flush and gone after. - Report `dead_lettered` on the delivery-mode response too (cubic). `node agent message auto` is the command an operator actually reaches for to wake a stuck agent, so it was the caller most likely to be told `flushed: 0` about a queue that had just been cleared. - Assert the `dead_letter_added` frames in the orphan tests (cubic). The store is not the observable surface; a dashboard only learns through the event stream, so asserting `dead_letters.len()` alone let an emission regression pass. Both tests now check kind, delivery id, and the orphan reason. - Re-pair the doc blocks in dead_letter.rs (cubic). Inserting `dead_letter_parked_message` above `dead_letter_pending_delivery` left the "terminally-failed pending delivery" docs describing a message that was never a PendingDelivery. Second time this PR split a doc block that way. - Correct the changelog claim (cubic). The fix does not "wake" the agent for orphaned messages — those are dead-lettered, never delivered. It restores the ability to receive what arrives afterwards, and only orphaned parked messages dead-letter; injection failures and ordering gaps stay held. Proof case hardened after review (CodeRabbit): - `remaining === 0` alone would have been satisfied by an implementation that injected the stale message into the rebound identity — exactly the cross-identity behaviour the regression exists to prevent. The head arm now also requires `dead_lettered === 1`, `flushed === 0`, and zero `delivery_ack` frames before it will report `fixed`. - Require the duplicate spawn to be rejected rather than merely tolerating it. If duplicate live-name spawns ever started succeeding, the case would keep reporting green while proving nothing. Both arms re-verified locally against the real broker binaries: head: pending 0, flush {"dead_lettered":1,"flushed":0,"held":0} base: pending 1, flush {"flushed":0} Verified: 1039 passed / 5 failed, the 5 being `spawner::tests::broker_hook_*`, which fail identically on untouched origin/main on this machine and pass on CI ubuntu and macOS. fmt, clippy -D warnings, and prettier clean. Refs: #1593, #1559, #1604, #1554 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014N3p9VEngj9kLDFFhrzHNd Session-Id: 246fba6e-6436-46ae-bc50-6bb3cca0d95e
CHANGELOG: 11.10.1 shipped the multiline-task fix, so it leaves `[Unreleased]` and moves under the released heading. This branch's entries stay pending at `[Unreleased - Minor]`. Proof case, from review (cubic): - Wait for the fake's `rotate_armed` event before the second spawn. Writing the rotation to stdin and spawning immediately is a race: if `agent.register` lands before the fake reads the command it replies with the OLD identity, no rebind happens, and the case silently stops exercising the orphan path while still reporting a result. A proof case that can pass for the wrong reason is worse than no proof case. - Require the head arm to prove the queue is *usable* again, not merely empty. After the flush it sends a second message and requires that one to inject (`flushed === 1`), so a silent removal that leaves the queue broken cannot pass as a fix. Both arms re-verified locally against the real broker binaries after these changes: head -> parked_message_dead_lettered_and_queue_drains base -> parked_message_never_leaves_the_queue Refs: #1593, #1559, #1604, #1554 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014N3p9VEngj9kLDFFhrzHNd Session-Id: 246fba6e-6436-46ae-bc50-6bb3cca0d95e
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| await mkdir(path.dirname(resultPath), { recursive: true }); | ||
| await writeFile( | ||
| resultPath, | ||
| `${JSON.stringify({ version: 1, caseId: CASE_ID, arm, outcome, signature, details })}\n`, |
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Fixed in 3480ad0. The observation file now contains only normalized, static outcome text; network-derived agent IDs, queue counts, and flush payloads are used solely for in-process assertions/errors and are no longer persisted. I also kept the evidence stronger than the original case: the head arm requires the exact initial and recovery flush contracts, proves the orphan body never reached the rebound PTY, then observes the follow-up body in that PTY and its ACK.
The proof case launched the broker with `--api-port 0` and discovered the
assigned port by matching `API listener bound on 127.0.0.1:(\d+)` in its
output. That line is a startup diagnostic, not an interface. It held on macOS
and did not on the Linux CI runner, so the runner timed out waiting for a port
that was already listening:
Timed out waiting for broker API listener to bind.
Case runner failed with exit 1; expected-red behavior must be reported as a
successful structured observation
✗ prove-base — FAILED: output does not contain "PR_PROOF_ARM_COMPLETE arm=base"
A non-zero runner exit is an infrastructure failure under the case contract, so
this took down the arm that was supposed to report red rather than producing an
observation.
The runner now picks a free port itself, passes it explicitly, and waits on
`GET /api/status` — probing the thing it actually needs instead of a log line.
It also fails fast with the broker's exit code if the process dies during
startup, so a real startup fault reports as one instead of a generic timeout.
Also bounds the dead-letter event emit (broker side). `send_broker_event` ends
in `tx.send(...).await`, which blocks on a full channel, and the orphan branch
calls it inside the flush loop — once per parked message, up to
`MAX_PENDING_PER_WORKER`, on the runtime event loop. A full or unattended SDK
channel could therefore stall every other API request, which is what a hung
`status` looks like. It now uses the existing `emit_http_api_event_with_timeout`
and writes the dead-letter record before emitting, so a dropped event costs
observability on one entry and never the record itself.
Both arms re-verified locally against the real broker binaries:
head -> parked_message_dead_lettered_and_queue_drains
base -> parked_message_never_leaves_the_queue
Refs: #1593, #1559
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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3 issues found across 2 files (changes from recent commits).
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<file name="crates/broker/src/runtime/dead_letter.rs">
<violation number="1" location="crates/broker/src/runtime/dead_letter.rs:266">
P2: When 256 orphaned messages are flushed while the outbound event channel is full, this starts a new 25 ms wait for every dead-letter event, blocking the runtime loop for roughly 6.4 seconds. Use a nonblocking send or one flush-wide deadline so a full event channel cannot serially delay every API request.</violation>
</file>
<file name="tests/relayflows/cases/1593-parked-agent-orphaned-receipt/run.mjs">
<violation number="1" location="tests/relayflows/cases/1593-parked-agent-orphaned-receipt/run.mjs:90">
P3: The selected port is released before the broker binds it, leaving a time-of-check/time-of-use race. Keep the reservation through launch where possible, or retry the broker startup when the chosen port is already occupied.</violation>
<violation number="2" location="tests/relayflows/cases/1593-parked-agent-orphaned-receipt/run.mjs:118">
P2: If `/api/status` accepts a connection but hangs, this readiness loop hangs because `fetch` has no timeout, so the 60-second startup deadline is ineffective. Add an abort/deadline to the readiness request, or make `api` enforce a bounded request timeout.</violation>
</file>
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Session-Id: 01a060ff-9135-7bf0-9f39-1618ec160c82
Session-Id: 01a060ff-9135-7bf0-9f39-1618ec160c82
…gine
The previous case used an in-case fake, and the fake decided the one thing the
bug depends on. It had a `rotate_agent_id` command: the case simply asserted
that re-registering a live name yields a new immutable `agent_id`. The real
engine refuses that — `409 agent_already_exists`, verified by driving
`@relaycast/engine` directly — so the case was proving a trigger production
does not have.
This replaces the fake with a real self-hosted engine. `@relaycast/engine`
publishes `dist/bin/serve.js`, which runs standalone against a local sqlite
file, so the case now uses a real workspace, a real node mint, real
`agent.register` identity rules, and a real `POST /v1/dm`. The engine decides,
not the case.
The trigger is corrected accordingly. It is NOT a duplicate spawn (the engine
409s that, and the broker keeps its existing id). It is the agent record being
deleted out from under a still-live worker that holds a parked queue, after
which the broker re-registers the freed name and receives a genuinely new
immutable id — a release issued elsewhere, a dashboard release, or a roster
reaper. `bind_authoritative_identity` then retires the cursor every parked
receipt points at.
Getting this wrong once more was instructive and is recorded in the case: an
intermediate revision deleted AND recreated the record, so the broker's own
register collided (409), it kept the old id, nothing was orphaned, and the case
correctly refused to pass with `{"dead_lettered":0,"flushed":1}`. The broker
must mint the replacement, not the case.
Measured on both arms with real broker binaries against the real engine:
base daf8a7c: pending after flush = 1
-> parked_message_never_leaves_the_queue
head : pending after flush = 0, flush reports
{"dead_lettered":1,"flushed":0,"held":0,"blocked_reason":null}
-> parked_message_dead_lettered_and_queue_drains
identity replaced: 220857008603648000 -> 220857009920659456
The head arm additionally requires that the orphan was dead-lettered rather
than injected, that the worker's screen never shows it, and that a follow-up DM
sent afterwards injects normally — so a silent removal that leaves the queue
broken cannot pass as a fix.
One operational note recorded in the runner: the broker must be launched with a
clean environment. Inheriting the caller's `RELAY_*` variables authenticates it
against production instead of the engine under test, which surfaces as
"all configured multi-workspace memberships were rejected".
Refs: #1593, #1559
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014N3p9VEngj9kLDFFhrzHNd
Session-Id: 246fba6e-6436-46ae-bc50-6bb3cca0d95e
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3 issues found across 3 files (changes from recent commits).
Prompt for AI agents (unresolved issues)
Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.
<file name="tests/relayflows/cases/1593-parked-agent-orphaned-receipt/run.mjs">
<violation number="1" location="tests/relayflows/cases/1593-parked-agent-orphaned-receipt/run.mjs:110">
P3: `apiPort` is reserved with freePort() and then discarded via `void apiPort;` — nothing uses it because the broker is spawned with `--api-port 0` and its bound port is read from connection.json. This dead reservation also briefly occupies a port for no purpose and can fail spuriously if no port is available. Drop the variable.</violation>
<violation number="2" location="tests/relayflows/cases/1593-parked-agent-orphaned-receipt/run.mjs:148">
P2: The proof API requests are no longer bounded. brokerClient (line 303) and the readiness probe `api('GET', '/api/status')` carry no AbortSignal timeout, so a connected-but-hung status endpoint never settles the in-flight fetch. Because `waitFor` blocks inside `await predicate()`, the loop never re-checks its deadline, and the outer 90s READY_TIMEOUT_MS is defeated — the exact hang this case previously guarded against with 2s readiness / 15s operation timeouts. The same applies to the engine readiness `fetch(engineUrl)` and engineClient. Restore an AbortSignal timeout on every proof fetch.</violation>
</file>
<file name="tests/relayflows/cases/1593-parked-agent-orphaned-receipt/relaycast-engine.mjs">
<violation number="1" location="tests/relayflows/cases/1593-parked-agent-orphaned-receipt/relaycast-engine.mjs:56">
P2: The prebuilt-driver path is wrong, so a shipped prebuilt is never used. prebuildify (better-sqlite3's layout) places addons under `prebuilds/<platform>-<arch>/better_sqlite3.node` — a directory per platform-arch with the addon file inside it. The code computes `path.join(root, 'prebuilds', `${process.platform}-${process.arch}.node`)`, i.e. `prebuilds/linux-x64.node`, which never exists, so `existsSync(prebuilt)` is always false and every runner falls back to compiling from source. That makes the 'used prebuilt sqlite binding' branch dead and fails the case on hosts that have a usable prebuilt but no node-gyp compiler toolchain. Point the check at the directory layout: `path.join(root, 'prebuilds', `${process.platform}-${process.arch}`, 'better_sqlite3.node')`.</violation>
</file>
Tip: Review your code locally with the cubic CLI to iterate faster.
Re-trigger cubic
| return connection.url; | ||
| }, 'the broker connection file to publish its bound API port'); | ||
| const api = brokerClient(brokerUrl); | ||
| await waitFor(() => api('GET', '/api/status').then(() => true), 'the broker API to answer'); |
There was a problem hiding this comment.
P2: The proof API requests are no longer bounded. brokerClient (line 303) and the readiness probe api('GET', '/api/status') carry no AbortSignal timeout, so a connected-but-hung status endpoint never settles the in-flight fetch. Because waitFor blocks inside await predicate(), the loop never re-checks its deadline, and the outer 90s READY_TIMEOUT_MS is defeated — the exact hang this case previously guarded against with 2s readiness / 15s operation timeouts. The same applies to the engine readiness fetch(engineUrl) and engineClient. Restore an AbortSignal timeout on every proof fetch.
Prompt for AI agents
Check if this issue is valid — if so, understand the root cause and fix it. At tests/relayflows/cases/1593-parked-agent-orphaned-receipt/run.mjs, line 148:
<comment>The proof API requests are no longer bounded. brokerClient (line 303) and the readiness probe `api('GET', '/api/status')` carry no AbortSignal timeout, so a connected-but-hung status endpoint never settles the in-flight fetch. Because `waitFor` blocks inside `await predicate()`, the loop never re-checks its deadline, and the outer 90s READY_TIMEOUT_MS is defeated — the exact hang this case previously guarded against with 2s readiness / 15s operation timeouts. The same applies to the engine readiness `fetch(engineUrl)` and engineClient. Restore an AbortSignal timeout on every proof fetch.</comment>
<file context>
@@ -36,240 +47,200 @@ const arm = requiredValue('RELAY_PR_PROOF_ARM');
+ return connection.url;
}, 'the broker connection file to publish its bound API port');
+ const api = brokerClient(brokerUrl);
+ await waitFor(() => api('GET', '/api/status').then(() => true), 'the broker API to answer');
- const api = makeApi(apiPort);
</file context>
| if (!existsSync(root)) return; | ||
| const target = path.join(root, 'build', 'Release', 'better_sqlite3.node'); | ||
| if (existsSync(target)) return; | ||
| const prebuilt = path.join(root, 'prebuilds', `${process.platform}-${process.arch}.node`); |
There was a problem hiding this comment.
P2: The prebuilt-driver path is wrong, so a shipped prebuilt is never used. prebuildify (better-sqlite3's layout) places addons under prebuilds/<platform>-<arch>/better_sqlite3.node — a directory per platform-arch with the addon file inside it. The code computes path.join(root, 'prebuilds', ${process.platform}-${process.arch}.node), i.e. prebuilds/linux-x64.node, which never exists, so existsSync(prebuilt) is always false and every runner falls back to compiling from source. That makes the 'used prebuilt sqlite binding' branch dead and fails the case on hosts that have a usable prebuilt but no node-gyp compiler toolchain. Point the check at the directory layout: path.join(root, 'prebuilds', ${process.platform}-${process.arch}, 'better_sqlite3.node').
Prompt for AI agents
Check if this issue is valid — if so, understand the root cause and fix it. At tests/relayflows/cases/1593-parked-agent-orphaned-receipt/relaycast-engine.mjs, line 56:
<comment>The prebuilt-driver path is wrong, so a shipped prebuilt is never used. prebuildify (better-sqlite3's layout) places addons under `prebuilds/<platform>-<arch>/better_sqlite3.node` — a directory per platform-arch with the addon file inside it. The code computes `path.join(root, 'prebuilds', `${process.platform}-${process.arch}.node`)`, i.e. `prebuilds/linux-x64.node`, which never exists, so `existsSync(prebuilt)` is always false and every runner falls back to compiling from source. That makes the 'used prebuilt sqlite binding' branch dead and fails the case on hosts that have a usable prebuilt but no node-gyp compiler toolchain. Point the check at the directory layout: `path.join(root, 'prebuilds', `${process.platform}-${process.arch}`, 'better_sqlite3.node')`.</comment>
<file context>
@@ -0,0 +1,81 @@
+ if (!existsSync(root)) return;
+ const target = path.join(root, 'build', 'Release', 'better_sqlite3.node');
+ if (existsSync(target)) return;
+ const prebuilt = path.join(root, 'prebuilds', `${process.platform}-${process.arch}.node`);
+ if (existsSync(prebuilt)) {
+ await mkdir(path.dirname(target), { recursive: true });
</file context>
| const prebuilt = path.join(root, 'prebuilds', `${process.platform}-${process.arch}.node`); | |
| const prebuilt = path.join(root, 'prebuilds', `${process.platform}-${process.arch}`, 'better_sqlite3.node'); |
|
|
||
| // The broker must not inherit this process's own Relaycast credentials, or it | ||
| // authenticates against production instead of the engine under test. | ||
| const apiPort = await freePort(); |
There was a problem hiding this comment.
P3: apiPort is reserved with freePort() and then discarded via void apiPort; — nothing uses it because the broker is spawned with --api-port 0 and its bound port is read from connection.json. This dead reservation also briefly occupies a port for no purpose and can fail spuriously if no port is available. Drop the variable.
Prompt for AI agents
Check if this issue is valid — if so, understand the root cause and fix it. At tests/relayflows/cases/1593-parked-agent-orphaned-receipt/run.mjs, line 110:
<comment>`apiPort` is reserved with freePort() and then discarded via `void apiPort;` — nothing uses it because the broker is spawned with `--api-port 0` and its bound port is read from connection.json. This dead reservation also briefly occupies a port for no purpose and can fail spuriously if no port is available. Drop the variable.</comment>
<file context>
@@ -36,240 +47,200 @@ const arm = requiredValue('RELAY_PR_PROOF_ARM');
+
+ // The broker must not inherit this process's own Relaycast credentials, or it
+ // authenticates against production instead of the engine under test.
+ const apiPort = await freePort();
broker = spawn(
binaryPath,
</file context>
| } | ||
| function brokerClient(baseUrl) { | ||
| return async (method, route, body) => { | ||
| const res = await fetch(`${baseUrl}${route}`, { |
Session-Id: 246fba6e-6436-46ae-bc50-6bb3cca0d95e
Second review round on #1643. Six findings, all valid. 1. The error boundary did not cover proxy setup (CodeRabbit major, cubic P2). The catch wrapped only `run(...)`, but `startFleetNodeAttachProxy` is called before the try and throws `FleetNodeAttachError` for node_not_found / node_unreachable / control_plane_timeout, so those still rejected the Commander action and bypassed `deps.error`/`deps.exit(1)` — the exact inconsistency the comment claimed to fix. Only `agent_not_found`, raised inside `run`, was actually covered. The proxy is now created inside the try and closed in `finally` only when it exists. This is the second overclaiming comment in this PR: the first asserted that flush's request_id matching was strict when only the error path was. Both were caught by review rather than by me. 2. A disconnected flush reported a delivery-mode error (cubic P2). `rejectPendingDeliveryMode` rejected a pending flush with `delivery_mode_disconnected` and "…while the delivery-mode change was in flight". A flush never changes delivery mode, so an operator debugging one was pointed at an operation their command never performed. It now maps to `flush_disconnected` with matching wording; unrelated error codes pass through untouched. 3. `SetDeliveryMode`'s doc comment had re-attached to `FlushPending` (cubic P3). Inserting the new variant between the doc block and its `#[serde(rename)]` left FlushPending claiming it flips delivery mode and replies with `DeliveryMode`, while SetDeliveryMode lost its docs entirely. Both restored. This is the fourth doc block I have split this way in this session (twice in #1639, twice here). Inserting a declaration between a doc comment and the item it documents is a systematic blind spot, not four coincidences. 4. The case declared `broker-linux-x64` but never used it (cubic P3). The runner is a pure CLI-surface probe and never touches RELAY_PR_PROOF_BROKER_BINARY, so the requirement made the dispatcher pay for a cold Rust broker build on BOTH SHAs for nothing. Dropped. 5. The `--help` probe was unbounded (cubic P3). spawnSync is synchronous, so a stalled probe would consume the case's entire 900s budget and surface as an unattributed timeout. Bounded at 60s like its sibling. 6. Blank `--node` and orphan `--workspace-key` were already fixed in e324209; those threads were filed against the previous head. Verified: tsc clean, clippy -D warnings clean, 80/80 tests. Refs: #1593 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014N3p9VEngj9kLDFFhrzHNd Session-Id: 246fba6e-6436-46ae-bc50-6bb3cca0d95e
3 participants
RelayFlow Proof
bugfix1593-parked-agent-orphaned-receiptThe case drives real broker binaries against a real self-hosted Relaycast
engine (
@relaycast/engine, standalone on sqlite) — real workspace, real nodemint, real
agent.registeridentity rules, realPOST /v1/dm. It observesGET /api/spawned/{name}/pending, which exists on both arms.daf8a7c7cparked_message_never_leaves_the_queueparked_message_dead_lettered_and_queue_drainsHead also requires
dead_lettered: 1,flushed: 0, that the worker's screennever shows the orphan, and that a follow-up DM injects normally afterwards.
The trigger — corrected
An earlier revision of this PR claimed the trigger was a double-dispatched
spawn (#1604 / #1554). That was wrong, and the rewrite to a real engine is
what caught it. The earlier case used an in-case fake with a
rotate_agent_idcommand — it simply asserted that re-registering a live name yields a new
agent_id. Driving the real engine shows it returns409 agent_already_existsand does not mutate the identity, so that path never orphans anything.
The real trigger: the agent record is deleted out from under a still-live
worker that holds a parked queue — a release issued elsewhere, a dashboard
release, or a roster reaper (#1591, #1602, rc#91) — after which the broker
re-registers the freed name and receives a genuinely new immutable id.
bind_authoritative_identitythen retires the cursor every parked receiptpoints at, while
delivery_statessurvives because no local release ran.Measured, real engine, real binaries:
The bug
A parked (
manual_flush) agent could be made permanently deaf, while every sender kept getting a success receipt.Held messages are stamped with a
RelaycastDeliveryReceiptcarrying theagent_idthat was live at queue time. The flush gate looked the ACK cursor up by that id:That key is not stable. Two ordinary events invalidate it while messages sit parked:
bind_authoritative_identity— spawn register (fleet.rs:1823), token identity resolve (:2115), inventory repair (:2057).bind_identitydoesself.agents.remove(&previous.agent_id)and retires the id. The cursor cannot come back either:bind_identityrefuses to re-adopt a retiredagent_id, so no later frame recreates it.seed_cursoron a node-control resume handshake setsacked == received ==Relaycast's own position. A parked seq at or below it can never satisfyseq == acked + 1.can_ack_receiptreturnedfalsefor both, which is indistinguishable from "not ACKable yet". Soflush_pending_relay_messagesbroke on the head message forever →flushed: 0→ andapi.rsdeliberately pins the worker back intomanual_flushon a partial flush. Every later DM parked behind the poisoned head.This matches the sharpest recipient-side evidence on #1593: an agent parked at its prompt with 18 unread counted at the recipient and never injected, four senders backed up at once — one agent-scoped injector stopped, not N per-sender paths. And #1559's "
auto_injectdoes not stay fixed."Why it stayed hidden
ListenApiRequest::FlushPendingreturned a bare count;flush_result.failurewent only to atracing::warn!. Sonode agent message flush Xprinted{"flushed": 0}with no error.That ambiguity has already cost real diagnostic time — the flush evidence on #1593 was retracted as "0 is simply the expected answer and carries no information". It was not a null result. It was a swallowed failure.
The fix
Split the gate into
receipt_ackability→Ready/Blocked/Orphaned { IdentityRetired | CursorMovedPast }.Withholding the ACK was always the safe half. Withholding the message was the bug.
Tradeoff, stated plainly
An orphaned frame that Relaycast later redelivers under the new identity can now be seen twice. Duplicate delivery beats permanent deafness, and the old behaviour's apparent safety bought nothing — a retired identity is never redelivered to in the first place.
Observability
POST /api/spawned/{name}/flushnow returnsheldandblocked_reasonalongsideflushed, so an empty queue is distinguishable from a jammed one. Additive; older brokers omit the fields and the client tolerates that.Proof — red then green, byte-identical probe
RED (source at
origin/maindaf8a7c7c, tests applied):left: 0is the bug verbatim — the flush injects nothing.GREEN (fix applied, same test file):
I ran red twice on purpose. After the first red I removed
can_ack_receipt(nothing calls it post-fix; it would tripdead_codeunder-D warnings), which meant editing one prose comment in the test file that named it. Rather than ship a pair with an asterisk, I reverted only the source files toHEAD, kept the final test file, and re-ran. The transcript above is that second run — the probe is identical in both directions.The guards are the point
manual_flush_still_stops_on_a_genuine_sequence_gap(new) andmanual_flush_failure_retains_failed_message_and_suffix_without_ack(pre-existing) pass in both directions. The fix is not "ACK everything and hope" — ordering is still enforced; only the never-ACKable case drains.Checks
cargo fmt --all -- --checkcargo clippy -p agent-relay-broker --all-targets -- -D warningsnpm run typecheckflushPendingAbout those 5 failures — not from this diff
All 5 are
spawner::tests::broker_hook_*, in a file this PR never touches. I stashed the entire diff and re-ran them against pristineorigin/mainin the same worktree:Byte-identical failure set. Cause: the dev machine has a leaked global
core.hooksPath(git config --global --get core.hooksPath→ anagent-relay-git-hooks-*temp dir from Aug 31). A globalcore.hooksPathoverrides repo-local.git/hooks, so the repo hooks those tests install never run and the commits they expect to be rejected succeed. Environmental, pre-existing, and it makescargo test -p agent-relay-broker --libred on untouchedmainon that box. Should pass on clean CI; if it does not, that is a separate pre-existing issue this branch neither introduced nor fixes.Scope
This is distinct from #1602 (roster/attach drift). #1602 explains routes resolving to nowhere live; this explains the queued-but-never-injected case flagged as unowned on #1593 — "Neither lane may claim this issue closed without a post-fix discriminator covering that queued-but-not-injected case." This is that discriminator. It does not by itself close #1593.
Refs: #1593, #1559
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