Register one task. Historical input refs use task:/artifact: or artifact:.

Register a batch DAG atomically. Local refs use @task/artifact and control deps use @task.

Return task state, attempts, dependencies, and committed artifacts.

List recent tasks, optionally filtered by state.

Cancel a pending or running task and invalidate its current fencing generation.

Create a new execution generation for a failed/canceled/blocked task.

List immutable artifacts committed by a task.

Resolve one task output to its immutable artifact record and local storage path.

Return the persisted dependency neighborhood around a task.

Read durable task/artifact lifecycle events after an event ID.

Long-poll durable events without busy waiting; reconnect using the last event ID.

Show configured capacity and current reservations; no resource prediction is performed.