Post-audit sweep over the 135 audit-fix commits since 19a474d3:
1. Stripped every # Fxxx: audit-ID token from comments AND every Fxxx token
from docstring openings across 211 blocks / ~626 lines. The CEO flagged
these twice: audit-issue IDs in code confuse future devs/agents. The
descriptive text is preserved; only the Fxxx token is removed (and bloated
narrative blocks trimmed to 1-3 lines keeping the one non-obvious invariant).
2. Trimmed bloated comments/docstrings to the concise standard (1-3 lines).
3. Added missing behavior-change docs for the audit-fix batch: prompts/roles
(documenter, pr_reviewer, qa), user-facing docs (api auth, websockets,
agent-gateway, megatask, merge-model, task-lifecycle, grok, resilience,
conventions, panel, security, troubleshooting), and the RAG corpus (cell-pm,
main-pm, pr-reviewer, qa roles; conventions; messaging-tools; escalation;
megatask; task-claiming workflows).
Comment/docstring/prose ONLY — zero code-line edits (verified: the diff
contains no def/class/return/if/for/await/assignment/call lines). Gates green:
ruff format + ruff check clean, mypy clean on roboco/. The only pytest failures
are the pre-existing sync_branch tracing-decision gap (B1, 250be5c2) — not
sweep-caused and tracked separately.
_run_claim_guards read the agent's other tasks via unlocked SELECTs
before claim() took its row lock, and claim()'s FOR UPDATE locked only
the TARGET row — so two concurrent i_will_work_on by the SAME agent on
TWO DIFFERENT pending tasks each locked their own row, each read an
empty in_progress set, each passed already_active, each claimed+started
→ the agent ended with two in_progress tasks (the in-process asyncio
Lock is lost on orchestrator-restart split-brain, so it wasn't a
DB-level guarantee).
Fix: TaskService.acquire_claim_lock takes a transaction-scoped
pg_advisory_xact_lock keyed by hashtextextended(agent_id). The gate
acquires it BEFORE the guard reads (for non-coordinator roles only) so
the second concurrent claim's read sees the first's committed
in_progress task and is rejected. Tx-scoped → auto-releases on
commit/rollback, can't outlive the request.
Coordinator exemption (the key logical-regression guard): cell_pm /
main_pm do NOT take the lock — the PM coordinator concurrency feature
lets a PM plan+delegate many roots in parallel, and a per-agent lock
would serialize those claims and regress it. Matches the existing
_COORDINATOR_ROLES already_active/paused guard exemption. A hash
collision only causes benign false serialization, never a false
negative.
Tests: unit (dev acquires lock before guard read; coordinator does
not) + real-PG integration (same-agent serializes, different-agent
does not, releases on rollback).
Renn F