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.
The delegate sibling-dedup guard read the parent's existing subtasks via an
unlocked get_subtasks SELECT (the dedup read) then created the subtask (the
write) with no DB serialization between them. Two concurrent delegate calls
for the same parent (PM re-delegating while a reaper re-dispatches, or two
orchestrator ticks racing) each read a duplicate-free sibling set, each passed
the dedup guard, and each created a subtask — the parent got the duplicate the
guard exists to prevent (the smoke-run runaway pattern).
Fix: a PostgreSQL transaction-scoped advisory lock keyed by the parent task
id (seed 1, disjoint from the per-agent claim lock's seed 0), acquired at the
top of the delegate body before the first get_subtasks read (the briefing
context read AND the dedup sibling read) and held through create_subtask's
flush + the outer request commit. The second concurrent same-parent delegate
blocks until the first commits, then its dedup read sees the committed
sibling and is rejected.
Per-PARENT (not per-agent): a coordinator PM legitimately delegates many
subtasks under one parent in quick succession and plans many roots in
parallel — a per-agent lock would serialize all of a PM's delegates and
regress the PM coordinator concurrency feature. The per-parent lock
serializes only same-parent delegates (the dedup invariant is per-parent)
and leaves different parents untouched.
TDD: red-first ordering test (lock acquired before first get_subtasks read
and before create_subtask) + no-regression test (create still runs).
Renn F