Problem:
Stale worker detection was reporting incorrect durations when sessions
were reused. Workers showed total session lifetime rather than time
since current task assignment.
Example:
- Session created 13 hours ago for issue #71
- Session reused 4 minutes ago for issue #106
- Status incorrectly showed: "DEV active on #106 (3.3h)"
- Should show: "DEV active on #106 (4m)"
Root Cause:
In recordWorkerState(), startTime was only set when spawning a new
session (sessionAction === 'spawn'). When reusing an existing session
(sessionAction === 'send'), the old startTime persisted, causing
stale worker detection to use total session age instead of task age.
Solution:
Always set startTime to current time when activating a worker,
regardless of whether we're spawning a new session or reusing one.
The startTime field now consistently represents "when did this worker
start THIS specific task" rather than "when was the session created".
Changes:
- lib/dispatch.ts: Move startTime assignment outside spawn-only block
- startTime now set unconditionally for both spawn and send actions
- Maintains backward compatibility with existing health checks
Impact:
- Stale worker detection now accurately reflects task duration
- Session reuse no longer causes false positive stale alerts
- Duration shown in status matches actual time on current task
Addresses issue #108
226579086f