Apply Step 1 of stuck-PR triage. The May 7 reaper allowlist (extract/,
reweave/, fix/) deliberately excluded all agent-prefix branches per
Ganymede's review nit #3 — the rationale being that agent branches are
WIP feature work owned by the agent and shouldn't be auto-closed.
That decision was correct for theseus/feature-foo style branches.
It's wrong for {agent}/research-{YYYY-MM-DD} branches: those are daily
cron output, categorically disposable, regenerated by tomorrow's session.
Same shape as extract/ — content the pipeline-cron created and can
recreate, not feature work owned by the agent.
Production impact: 15 of 16 currently-stuck PRs are research-session
verdict-deadlocks aged 8-12 days. Without this change they sit forever
because the substantive_fixer can't classify (eval_issues=[] or
mechanical-only) and the reaper allowlist excludes them. Once live, next
hourly reaper cycle picks them up under the standard 24h-deadlock gate.
Pattern choice: %/research-2* (date-suffix) over %/research-% (loose).
Verified 15/15 stuck PRs match the tight pattern; sanity-check found
rio/research-batch-agents-memory-harnesses (manually-named, not date-
suffixed) which the loose pattern would catch and the tight pattern
correctly excludes. Closed-status today, but a future hand-named research
thesis branch sitting in request_changes for 24h would have been at risk.
The date prefix '2' threads the needle until 2030 and ages naturally.
Documented as an allowlist invariant ("disposable pipeline-generated
branches") rather than a list, per Step 3 of the plan — future additions
should match the invariant or update it explicitly.
Verified live before pushing:
- 15/15 currently stuck research PRs match the new pattern
- Zero false positives on existing branch namespace (closed branches
excluded by status='open' guard regardless)
- Existing extract/ reweave/ fix/ allowlist members unchanged
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>