An agent plans three steps: reproduce the defect, patch the calculation, and verify the checkout flow. The first Run ends after reproduction. The process restarts before the patch begins.
The plan should not exist only in the model's last message.
After reproduction, the graph says what remains
A task graph records tasks, root ordering, dependencies, status, source, linked Session or Thread identities, current runtime state, and selected working memory. It lets later Runs discover what remains and why a step is blocked.
Task-graph reads and writes return a task.graph event containing the current graph and version, allowing products to project work state without scraping progress prose. The separate task.updated event belongs to child-agent delegation lifecycle; it is not a graph-mutation notification.
After restart, a new Run reads the same plan
The graph—not the model's recollection—tells the new attempt that reproduction is complete and that the patch still blocks verification. A Run can fail while its task remains planned for recovery; a task can be completed across several Runs.
When two workers edit it, versioning protects intent
Graph writes carry expectedVersion. If another worker has already advanced the graph, a stale writer must reconcile against the new plan. This prevents an old completion update from erasing a newly added dependency or re-opening accepted work.
The graph can change because the user edits the plan, the agent proposes work, execution updates a task, or review changes acceptance state. Recording source and version keeps those actors legible.
Live progress stays live
Live progress can describe what the current attempt is doing without changing the durable task graph on every token. A progress stream is evidence about motion, not an alternate writer for the plan.
The neighboring concepts keep their own authority
A child agent may perform one task, but parent/child lineage and result fan-in belong to delegation. Mission Control adds project attempts, evidence, review, and acceptance; the graph cannot accept its own work.
Delegation and child agents follows the child relationship. Project actions and review follows work into acceptance.