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daily-fix: WARN when GCP workload chain has no persist phase

kind: infra#wf-fix#wf-fix-fp:c6b74b98ad55#daily-auto-filed
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Overview / Motivation

Auto-filed by the /daily 2026-07-28 problem sweep (transcript miners over the day's 55 session transcripts). Source: group-A P1.

Goal

Add a dispatch-time backstop so a GCP workload chain with no upload/persist phase for its produced artifacts cannot launch silently.

Workflow gap

  • Bug observed: #1739's GCP run completed its phases and the instance approached grace-poweroff with ZERO artifacts on HF — all 7 expected prefixes were misses; ~2h of improvised recovery uploads followed. (inferred — not probed at mining time: the miner did not re-read the round-2 diff to confirm which phase should have carried the upload wiring; the planner should reconstruct from #1739's events.)
  • Why it is a workflow gap: the planner-side fix landed as #1779 (verified: commit f7232aca11, 'planner §10 + Methodology lens 18 — ephemeral-lane text/JSON dest durability') but nothing checks at DISPATCH time — a plan drift or hand-composed relaunch chain can still launch persist-less.
  • Confidence (emitter): medium
  • verified-at-filing: #1779's merge resolves (git rev-parse f7232aca11^{commit} OK, 2026-07-29 UTC) — this filing is the dispatch-time sibling, not a duplicate; grep -n 'upload' .claude/agents/experimenter.md → no pre-launch persist-phase check among the hits.

Proposed change (candidate diff sketch — refine in planning)

Experimenter pre-launch gate item: enumerate the workload chain's phases; if the plan declares git/HF-destined outputs and no phase names an upload/persist step, WARN loudly (or refuse for raw-completion producers). Optionally a mechanical dispatch_issue.py lint.

Scope / surfaces

  • Primary targets: .claude/agents/experimenter.md (pre-launch protocol), scripts/dispatch_issue.py

Constraints / invariants

  • Workflow-surface only — never experiment code, configs/, or tasks/.
  • scripts/workflow_lint.py --check-asks passes; ruff on touched files passes.
  • The spawned session runs under a workflow_fix_target: Provenance line — recursion guard applies (it parks, never auto-routes, its own subagents' workflow-fix candidates).

Provenance

  • fingerprint: c6b74b98ad55

  • workflow_fix_target: .claude/agents/experimenter.md

Activity