pastilhasandClaude Opus 4.8
621f93b884
Phase 1 gap surfaced by a long overnight job: armIdle fired 30 min after the
last turn regardless of in-flight background work, so a silent run_in_background
job outliving the timeout got its persistent SDK session aborted — killing the
harness that delivers its task_notification (and any detached watcher's hook).
Fix = task-lifecycle heartbeat: track task:started → task:notification per
session; suppress/re-arm the idle timer while any task is pending. task:started
also clears a pending idle timer. So long run_in_background jobs keep their own
session alive and their completion is delivered; idle-GC resumes only once all
tasks finish and the session is truly idle. Pairs with the Activity path-tail
(35973a5) for the pure-setsid case.
Not deployed (no restart — long job still running); lands with the Activity
batch on next restart.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>