TaskTool

Unified tool for background task lifecycle management. Combines task result retrieval, cancellation, and listing into a single tool class.

• task_output — retrieve result (blocking or non-blocking)

• task_cancel — cancel a running task

• task_list — list all tracked tasks with optional status filter

All operations are scoped to the current parent session ID via RuntimeContext. The TaskRepository handles fallback to workspace-persisted records when no local future exists (cross-node or post-restart scenarios).