refactor(acp): reduce bridge to automation protocol

packages/core/session/src/types.ts

@@ -138,10 +138,9 @@ export type TurnEndReason = TurnEndReasonMap[keyof TurnEndReasonMap]
  *
  * Deliberately minimal: a human-readable `content` line and a three-state
  * `status`. No id, priority, or `activeForm` — the list is replaced wholesale
- * on every write (last-write-wins), so entries need no stable identity, and the
- * status triple is exactly the ACP `PlanEntryStatus`, so a UI bridge can map a
- * todo list onto an ACP `plan` 1:1 (synthesizing the priority ACP additionally
- * requires).
+ * on every write (last-write-wins), so entries need no stable identity. The
+ * three statuses describe the complete portable lifecycle needed by model and
+ * UI consumers.
  */
 export interface TodoItem {
   /** What this task is — a short imperative line shown in the UI. */