Slice 4 of the worker state consolidation refactor. Eliminates the
"queue never picks up planning tasks" bug structurally by routing both
the manager and MCP finalize paths through TaskStateService and
PlanningChainCoordinator.SetupChainAsync, where the auto-wake on enqueue
guarantees the queue picker claims the first child immediately.
- Delete TaskRepository.FinalizePlanningAsync; PlanningSessionManager
now orchestrates via _state.FinalizePlanningAsync + _chain.SetupChainAsync.
- Rename QueueSubtasksSequentiallyAsync to SetupChainAsync (internal);
layout is now Status=Queued + BlockedByTaskId, with auto-attached agent tag.
- OnChildFinishedAsync looks up the successor by BlockedByTaskId, drops
the legacy Waiting status lookup.
- PlanningMcpService.Finalize routes through state+chain; EditableStatuses
drops Waiting and adds Idle; gate uses PlanningPhase==Active.
- TaskStateService.FinalizePlanningAsync clears the planning session token.
- UI: TaskRowViewModel adds BlockedByTaskId; IsQueued/IsWaiting reflect
the new layout; TasksIslandViewModel.RemoveFromQueueAsync clears
BlockedByTaskId on dequeue.
- New regression test PlanningEndToEndTests.FinalizeAsync_FirstChildIs
ClaimedByPicker_WithinDeadline asserts the picker claims the first
child within 200ms with no manual WakeQueue.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Slice 3 of the worker state and queue consolidation refactor.
- Add IQueueWaker / QueueWaker (singleton holding the wake semaphore).
- Add IQueuePicker / QueuePicker; raw SQL UPDATE...RETURNING moves out of
TaskRepository.GetNextQueuedAgentTaskAsync (deleted) and now also filters
on blocked_by_task_id IS NULL and writes started_at on claim.
- TaskStateService takes IQueueWaker directly; the Func<QueueService>
indirection is gone. State transitions to Queued auto-wake the dispatcher.
- QueueService waits via the shared waker and dispatches via the picker.
- Drop explicit _queue.WakeQueue() calls in WorkerHub.QueuePlanningSubtasksAsync
and ExternalMcpService.AddTask. The hub WakeQueue endpoint stays for
diagnostics, delegating to _waker.Wake().
- Migrate tests; pre-existing flaky AppSettings/ExternalMcp tests untouched.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
