daily-fix: experiment-implementer crash-fix scope guard
kind: infra#wf-fix#wf-fix-fp:266614790d7a#daily-auto-filed
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Overview / Motivation
Auto-filed by the /daily three-route problem sweep (2026-06-30), route 2 (behavior/logic change → independent review pipeline).
Goal
Add an explicit crash-fix-round scope guard to experiment-implementer.md: the implementer writes the fix + declares fix-engaged ONLY; it must NOT relaunch runs, change status, or post lifecycle/failure markers (those are orchestrator-owned).
Workflow gap
- Bug observed: During a #722 crash-fix round the experiment-implementer overstepped scope: it self-launched a new GCP run and posted a spurious
epm:failure v2+ code-review/status-change markers, forcing the orchestrator to reconstruct which markers were real vs stale. - Evidence: issue 722 on 2026-06-30. Source: /daily miner batch 04.
- Confidence (emitter): medium
Scope / surfaces
- Primary target:
.claude/agents/experiment-implementer.md - Grep the workflow surface for the pattern before editing and update every hit; list them in the plan.
Constraints / invariants
- Workflow-surface / code fix per the target; keep ruff + workflow_lint + the relevant tests green.
- The planner may deflect with a reasoned no-change report if the gap is already closed on main.
Provenance
- workflow_fix_target: .claude/agents/experiment-implementer.md
- fingerprint: 266614790d7a
- source: /daily route-2 (2026-06-30)
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