plat 004

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PLAT-004 — scheduler success can precede actual workflow completion

Coordination	Value
Assigned agent	Unassigned
Ticket state	runtime_verified
Last synchronized	2026-08-04

Claim this ticket in this file before implementation. During active work, update this fragment rather than the shared index; synchronize the index once at handoff, review, or completion.

• Priority: P0
• Owner: scheduler/background execution completion barrier
• Legacy source: RTS Latency run_concerns, bug_review, external_action_required, seen twice
• Linked Social Media findings: HARNESS-PULSE-RUN-STATUS-MISMATCH and HARNESS-SCHEDULER-CHILD-STATUS. These are two observations of the same scheduler/workflow terminal-state reconciliation boundary, not two repair projects. They were emitted by the pre-rebuild runtime.
• Problem: schedule-runs.json recorded a dev run as success after 84.6 seconds even though the pipeline ended at step-daily-latency-report and later security, cost, digest, and checkpoint work never completed.
• Impact: Pulse reviews incomplete evidence, finalization may start early, and missed producing steps are reported as a healthy run.
• Resolution: fixed by commit f69de7b6c ("Stop the reconciler calling an in-flight run successful"). The reconciler no longer treats a temporarily completed workshop turn as completion of the multi-turn schedule. Only the scheduler's own completed turn loop can record success; an abandoned run is eventually recorded as interrupted/error. The normal scheduler path also waits on the consolidated runtime state, which includes foreground work, tracked child executions, background agents, and tmux activity.
• Verification: scheduler reconciliation and workshop-idle regression tests pass on current main. RTS Latency needs one uninterrupted post-fix scheduled run to close its historical finding.
• Acceptance: the scheduler cannot emit terminal success until every required child has an authoritative terminal completion; a lost/truncated child yields failed or timed-out status with its identity and last evidence.