feat(broker): log agent-name reclaims with their audit id - #1601
feat(broker): log agent-name reclaims with their audit id#1601khaliqgant wants to merge 1 commit into
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A takeover currently leaves no trace. relay#1596 made the broker reclaim a
colliding agent name through an audited takeover instead of the
register-or-rotate path that 401'd, but nothing logs that it happened — so
from the outside a reclaim is only visible as the *absence* of a
`401 Agent token required`, which is indistinguishable from the name never
having collided at all.
That gap is load-bearing where it matters most. Cloud retains no per-agent
broker logs, so proving a scheduled workflow reuses stable agent names
across runs currently rests on inference (same workspace, two green runs)
rather than evidence.
Log the reclaim at the three decision points:
- takeover succeeded info, with agent, agent_id and audit_id
- recover succeeded info, same fields (crash reclaim, auth.rs)
- legacy rotate fallback warn, on engines older than 8.2.0
The audit id is the point: it is the handle onto the engine's own
workspace-readable audit record, so the reclaim becomes checkable after the
fact instead of inferred. The fallback is a `warn` because that path
predates the audit surface and therefore produces no record — an operator
should be able to tell a silently-unaudited reclaim from an audited one.
Tokens are never logged, and the existing hashed `session_ref` treatment is
untouched.
`takeover_logs_the_audit_id` captures the subscriber output and asserts the
audit id and agent name reach the log and the token does not. Verified to
fail with the log line removed ("takeover must be logged, got: ").
1025 lib tests pass, clippy and fmt clean.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
📝 WalkthroughWalkthroughAgent reclaim paths now log agent names, agent IDs, audit IDs, and legacy fallback usage. A websocket integration test verifies audit metadata and token exclusion. The changelog documents the new logging behavior. ChangesAgent reclaim observability
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: ⚪ Minimal · up to The PR adds localized reclaim logging without changing runtime behavior or security-sensitive data handling. Only a minor CHANGELOG cleanup remains; no actionable merge-blocking risk remains. Suggested reviewers: Poem
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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| @@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0 | |||
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| ## [Unreleased] | |||
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🟡 Changelog heading missing required release level
The first pending entry is added under ## [Unreleased] (CHANGELOG.md:8), but AGENTS.md requires the first pending change to set the heading to [Unreleased - Patch], [Unreleased - Minor], or [Unreleased - Major]. The heading is left bare.
| ## [Unreleased] | |
| ## [Unreleased - Patch] |
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Actionable comments posted: 1
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Inline comments:
In `@CHANGELOG.md`:
- Line 12: Condense the changelog entry to one concise bullet describing the new
reclaim logging outcome, including takeover and crash-recovery details and
legacy fallback warnings as needed; remove the historical explanation beginning
with “Previously a reclaim was only visible.”
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CHANGELOG.mdcrates/broker/src/relaycast/auth.rscrates/broker/src/relaycast/ws.rs
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| ### Added | ||
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| - Agent-name reclaims are now logged. A takeover records the agent, its id and the engine's audit id at `info`; a crash recovery through the recover route does the same; and both log a `warn` when they fall back to the legacy workspace-key rotate on an engine older than 8.2.0, which produces no audit record. Previously a reclaim was only visible as the absence of a `401`, which is indistinguishable from the name never having collided. Tokens are never logged. |
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📐 Maintainability & Code Quality | 🟡 Minor | ⚡ Quick win
Remove the implementation backstory from this entry.
Keep one concise bullet that states the new logging outcome. Remove “Previously a reclaim was only visible...” because it explains prior implementation behavior instead of the pending change.
As per coding guidelines, “Do not add ... implementation backstory ... to CHANGELOG.md.”
🧰 Tools
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[style] ~12-~12: To make your writing flow more naturally, try moving the adverb ‘never’ closer to the verb ‘collided’.
Context: ...hich is indistinguishable from the name never having collided. Tokens are never logged. ## [11.8.2] ...
(PERF_TENS_ADV_PLACEMENT)
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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
minimal, and validate.
In `@CHANGELOG.md` at line 12, Condense the changelog entry to one concise bullet
describing the new reclaim logging outcome, including takeover and
crash-recovery details and legacy fallback warnings as needed; remove the
historical explanation beginning with “Previously a reclaim was only visible.”
Source: Coding guidelines
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| - Agent-name reclaims are now logged. A takeover records the agent, its id and the engine's audit id at `info`; a crash recovery through the recover route does the same; and both log a `warn` when they fall back to the legacy workspace-key rotate on an engine older than 8.2.0, which produces no audit record. Previously a reclaim was only visible as the absence of a `401`, which is indistinguishable from the name never having collided. Tokens are never logged. |
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Because this is the first user-visible entry after the 11.8.2 release, leaving the heading as plain [Unreleased] omits the required SemVer level and can cause the next release to be planned incorrectly; change it to the appropriate [Unreleased - Patch|Minor|Major] heading.
AGENTS.md reference: AGENTS.md:L36-L39
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| ### Added | ||
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| - Agent-name reclaims are now logged. A takeover records the agent, its id and the engine's audit id at `info`; a crash recovery through the recover route does the same; and both log a `warn` when they fall back to the legacy workspace-key rotate on an engine older than 8.2.0, which produces no audit record. Previously a reclaim was only visible as the absence of a `401`, which is indistinguishable from the name never having collided. Tokens are never logged. |
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This bullet includes three internal control-flow paths, engine-version details, historical 401 backstory, and a token-safety assertion instead of a concise surface-and-impact summary. Reduce it to a short agent-relay-broker logging impact statement so the cross-package release narrative remains scannable.
AGENTS.md reference: AGENTS.md:L45-L49
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| tracing::warn!( | ||
| agent = %existing.name, | ||
| agent_id = %existing.id, | ||
| "recover route absent on this engine; fell back to the legacy workspace-key rotate (unaudited)" | ||
| ); |
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On a pre-8.2 engine where /recover returns the route-level 404 but the subsequent token rotation fails, this warning is emitted before rotate_agent_token is awaited and falsely states that the broker “fell back” to an unaudited reclaim even though authentication returns an error and no reclaim occurred. Emit the warning only after the rotation succeeds, as the takeover fallback in ws.rs already does.
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Closing. I opened this to close a gap in a customer proof — "how do you know the broker reclaimed the name rather than never colliding?" — but that justification doesn't hold: it proves nothing about runs already completed, and using it for the proof would mean merge → release → snapshot rebuild → re-run, which nothing justifies. The one line worth keeping is the Superseded in priority by AgentWorkforce/cloud#3129. |
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Problem
relay#1596 made the broker reclaim a colliding agent name through an audited takeover instead of the register-or-rotate path that returned an opaque
401 Agent token required. It works — but nothing logs that it happened.So a reclaim is only observable as the absence of a 401, which is indistinguishable from the name never having collided in the first place.
That gap is load-bearing. Cloud retains no per-agent broker logs (
agent-relay cloud logs <run> --agent <name>comes back empty), so proving that a scheduled workflow reuses stable agent names across runs currently rests on inference — same workspace, two green runs — rather than on evidence. The question "how do you know it reclaimed the name rather than never colliding?" has no answer in the logs today.Change
Log the reclaim at its three decision points:
ws.rs)infoagent,agent_id,audit_idauth.rs, crash reclaim)infoagent,agent_id,audit_idwarnagent,agent_idThe
audit_idis the point of the change: it is the handle onto the engine's own workspace-readable audit record, so a reclaim becomes checkable after the fact rather than inferred.The fallback is a
warnrather thaninfodeliberately — that route predates the audit surface and produces no audit record, so an operator needs to be able to tell a silently-unaudited reclaim from an audited one. It fires only on engines older than 8.2.0.Also logs the singleflight cache re-check hit at
debug(a concurrent caller completed the takeover while this one waited), which was previously a silent early return.Safety
session_reftreatment from fix(broker): bump relaycast to 7.0.0 and reclaim agent names by audited takeover #1596 is untouched — the identity key is still hashed before it reaches anything workspace-readable.Verification
takeover_logs_the_audit_idinstalls a capturing subscriber, drives a real 409 → lookup → takeover sequence againsthttpmock, and asserts the audit id (aud_42) and agent name reach the log while the token (at_live_taken) does not.info!removed it fails ontakeover must be logged, got:(empty output), rather than passing vacuously.cargo clippy --all-targetsandcargo fmt --checkclean. (The one clippy warning in the crate is pre-existing, interminal_control.rs:1224.)🤖 Generated with Claude Code