Replace blocking await with non-blocking timer scheduling to handle race
condition between session.idle and session.error events. When ESC abort
occurs, session.error immediately cancels the pending timer, preventing
unwanted continuation prompts.
Changes:
- Add pendingTimers Map to track scheduled continuation checks
- Cancel timer on session.error (especially abort cases)
- Cancel timer on message.updated and session.deleted for cleanup
- Reduce delay to 200ms for faster response
- Maintain existing Set-based flag logic for compatibility
This fixes the issue where ESC abort would not prevent continuation
prompts due to event ordering (idle before error)
- Replace multiple Set-based tracking with explicit SessionStatus state machine
- Implement setTimeout+clearTimeout pattern for robust race condition handling
- SessionStatus tracks: idle → continuation-sent or aborted states
- Increase grace period to 500ms to accommodate event ordering delays
- Add cleanupSession utility for proper resource cleanup
This addresses ESC abort not canceling continuation prompts when session.idle
arrives before session.error event, which can occur due to async event processing
in OpenCode plugin system
YeonGyu-Kim