- Hook reads JSON from stdin (not env vars) matching Claude Code protocol
- end_turn = Idle (not NeedsInput); real questions come from hooks
- Permission prompt (stale tool_use) never becomes Idle
- Notifications auto-expire after 10s (--expire-time)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Notifier interface with ExecNotifier (notify-send) and NullNotifier
- FocusTimer thread-safe with Set/IsActive/Remaining
- shortName helper for session display names
- Full test coverage for all components