Watchdog ticket. Error msg already explains: shepherd killed duplicate social-pulse runtime because MC-4402 became canonical rerun. Likely benign dedup, not real failure. Verify against task_runs.

Two failure types. 07:28 (this ticket) = benign shepherd dedup. But 05:30 daily run has REAL recurring failure (today, 27th, 22nd) — "External runtime/provider failure" with traceback. Pull it.

05:30 root cause: NotebookLM `from_storage()` auth expiry — same token-expiry family fixed this morning by MC-4402 (re-auth + canonical rerun, verified done 7:38am). 07:28 = shepherd intentionally killing the duplicate scheduler runtime so it wouldn't compete with MC-4402's audio gen. Working as designed. Verify today's audio actually landed + MC-4402 status.

Audio delivered: `2026-05-29-social-pulse.mp3` present in audio-library/social/. MC-4402 rerun succeeded. Confirms remediation.

Audio 43MB written 07:39 today = MC-4402 rerun output. Full chain confirmed. No code change needed — watchdog ticket is benign. Load review tool + report.

REVIEW: Watchdog false-alarm, already remediated, no code change. **07:28 "failure" (this ticket)** = shepherd intentionally cancelling duplicate scheduler self-heal runtime after MC-4402 took over as canonical worker-owned rerun. Dedup working as designed, not a bug. **05:30 root cause** = NotebookLM `from_storage()` auth token expiry (same Google token family fixed this morning). MC-4402 re-authed + reran → today's audio delivered: `audio-library/social/2026-05-29-social-pulse.mp3` (43MB, 07:39, matches MC-4402 completion). **Recurring pattern**: 05:30 run also failed 05-22 + 05-27 on same NotebookLM auth expiry. Self-heal cycle works but noisy. If recurs → longer-lived/auto-refreshed NotebookLM token vs per-day re-auth. Not actioning now (covered by oauth-health-check auto-suspend + MC-4402). Recommend closing. {"mc_signal":"REVIEW","ticket":"MC-4413","nonce":"MC_TICKET_TURN:4413:1780034748757:6e2b2463","payload":"Watchdog false-alarm: 07:28 was shepherd dedup vs MC-4402 canonical rerun; 05:30 NotebookLM auth expiry already remediated, today audio delivered. Close."}