workflow-fix: forward rc==0 stderr at watcher set-status + f
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Overview / Motivation
Auto-filed by the /daily Step-C parked-candidate sweep from a candidate parked on task #1130 (park_form: recursion-guard).
Goal
Call the #1130 _forward_marker_child_stderr helper at the watcher's two set-status subprocess sites and file_infra_task.py's task.py new child so rc==0 stderr (the landing-check warning class) reaches wrapper transcripts.
Workflow gap
- Bug observed: The watcher's two set-status sites (_set_status_blocked; the follow-up re-park set-status awaiting_promotion subprocess) and file_infra_task.py's
task.py newchild still discard rc==0 stderr, swallowing the same landing-check warning class #1130 fixed for marker posts. - Why it is a workflow gap: task.py deliberately exits 0 with a stderr ERROR on deferred-commit / landing-check warnings; a subprocess caller that discards rc==0 stderr silently loses that signal — the exact gap #1130 closed for post-marker children.
- Confidence (emitter): medium (implementer-surfaced residual, #1130; ~4-line follow-up)
Proposed change (candidate diff sketch — refine in planning)
At each of the three subprocess call sites, after a successful run: _forward_marker_child_stderr(res, f"set-status blocked on #{issue}") / ("set-status awaiting_promotion ...") / ("task.py new (file_infra_task)") — or an equivalent local forwarder in file_infra_task.py.
Scope / surfaces
- Primary target:
scripts/autonomous_session_watch.py, scripts/file_infra_task.py - Grep the workflow surface for the pattern before editing (
grep -rln '<pattern>' .claude/ CLAUDE.md scripts/) and update every hit; list them in the plan.
Constraints / invariants
- Workflow-surface only — never experiment code,
configs/, ortasks/. scripts/workflow_lint.py --check-askspasses; ruff on touched files passes; ifworkflow.yamlorCLAUDE.mdchange, they stay consistent with the rule file.- This session runs under
EPM_WORKFLOW_FIX_SESSION=1and carries aworkflow_fix_target:Provenance line — it MUST NOT auto-route any of its own subagents' workflow-fix candidates (recursion guard).
Provenance
- workflow_fix_target: scripts/autonomous_session_watch.py, scripts/file_infra_task.py
- origin: parked candidate on task #1130 at 2026-07-08T09:02:57Z
parked — running under workflow_fix_target recursion guard (see .claude/rules/workflow-fix-on-bug.md § Recursion guard). Implementer-surfaced prose residual: the watcher's two set-status sites (_set_status_blocked; follow-up re-park set-status awaiting_promotion, subprocess block at autonomous_session_watch.py:8230) and file_infra_task.py's 'task.py new' child still discard rc==0 stderr and can swallow the same landing-check warning class on a different subcommand; the _forward_marker_child_stderr helper added by #1130 makes this a ~4-line follow-up. target_file: scripts/autonomous_session_watch.py, scripts/file_infra_task.py. routed: parked: workflow_fix_target recursion guard — for the next human/orchestrator pass.