park() detached the live session only after session.dispose() resolved,
so during the dispose window the registry still exposed ref.session at
idle status. Concurrent ensureLive()/hub-send handed out or injected into
the dying session, reporting success while the message was dropped once
detach committed.
- Replace the #parking Set guard with a #parks map of in-flight park state
that is cancelable until the session is detached.
- park() now yields a cancel window, then detaches + flips status to
parked BEFORE dispose(), and coalesces concurrent park calls.
- ensureLive() cancels a pre-detach park (keeps the live session) or waits
for detach+dispose then performs one coalesced revive; never returns a
disposing session.
- release()/dispose() drain any in-flight park; the idle re-arm skips while
a park owns the transition.
- IrcBus.send() gates parkable recipients through ensureLive and derives
the revived receipt from session identity, so receipts/unread counts
reflect actual delivery.
Fixes#5633
- Fixed cold revival flow so parked subagents are restored from persisted sessions at startup.
- Fixed session-init persistence to include spawns and readSummarize fields for replay accuracy.
- Fixed latest-session lookup by adding peekSessionInit for lock-free persisted contract access.
- Added lifecycle and session tests for cold-revive success, decline, and retry paths.
Introduces AgentLifecycleManager: when the task executor adopts a finished subagent the manager arms a TTL timer on idle, parks the agent on expiry (disposes the live session, keeps the AgentRef + sessionFile), and revives it on demand via an injected reviver. Only this manager flips parked ↔ idle. AgentRegistry now annotates session: AgentRef["session"] as null exactly when parked/aborted, and sdk.ts wires the lifecycle dispose into main-session teardown, derives agentKind once, and gates ref unregistration on parking so a parked agent stays addressable (history://, revive).
roboomp