Agent evolver identified a systematic pattern:
- Pattern: Multiple reviewer pool instances claiming the same PR within
seconds of each other, leading to duplicate reviews and wasted resources.
- Evidence: PRs #1219, #1236, #1247, #1198 were all double-claimed by
pr-reviewer-5 and pr-reviewer-4 within 28-64 seconds of each other.
The existing 'check before claiming' protocol has a race window that
is too small when multiple pools dispatch simultaneously.
- Fix: Added a two-phase claim protocol — after posting a claim comment,
wait 5 seconds and re-check for competing claims. Ties are broken by
lexicographic comparison of claim tokens.
This change requires human approval before taking effect.