Previously, concurrency was released in finally block AFTER prompt completion.
This caused queued tasks to remain blocked while prompt hangs.
Now release happens BEFORE prompt, allowing next queued task to start immediately
when current task completes, regardless of prompt success/failure.
Also added early release on session creation error for proper cleanup.
- Move clearNotificationsForTask() to finally block to ensure cleanup even on success
- Add TASK_TTL_MS (30 min) constant for stale task detection
- Implement pruneStaleTasksAndNotifications() to remove expired tasks and notifications
- Add comprehensive tests for pruning functionality (fresh tasks, stale tasks, notifications)
- Prevents indefinite Map growth when tasks complete without errors
🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)
Previously, background_cancel(all=true) only cancelled direct child tasks, leaving grandchildren and deeper nested tasks uncancelled. This caused background agents to continue running even when their parent session was cancelled.
Changes:
- Added getAllDescendantTasks() method to BackgroundTaskManager for recursive task collection
- Updated background_cancel to use getAllDescendantTasks instead of getTasksByParentSession
- Added comprehensive test coverage for nested task cancellation scenarios
🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)
YeonGyu-Kim