Merge branch 'codex/invariant-package-registration-gate' into codex/package-invariant-checks

# Conflicts:
#	.agents/notes/implemented/architecture/2026-07-19-package-invariant-runtime-contracts.i18n.yaml
#	.agents/notes/implemented/architecture/2026-07-19-package-invariant-runtime-contracts.md
#	.agents/notes/implemented/architecture/2026-07-19-package-invariant-runtime-contracts.zh.md
#	.agents/notes/implemented/architecture/2026-07-19-package-owned-invariant-service.i18n.yaml
#	docs/rfc/INDEX.md
#	packages/AGENTS.md

packages/tasks/tasks/README.md

@@ -20,12 +20,16 @@ Tasks belong to their owner and backend, not the producer tool fiber, so produce
 
 Service disposal closes listeners, cancels all live tasks, awaits their records, and detaches effects from surviving owner scopes. If teardown cancellation throws, the service force-fails the record and warns that work may be orphaned instead of deadlocking. A cancellation that returns but never settles `done` remains indistinguishable from a slow stop and can stall teardown.
 
-See the [task type catalog](../../../docs/core-data-structures/tasks.md) and [runtime RFC](../../../docs/rfc/implemented/architecture/2026-06-20-generic-long-running-tool-runtime.md).
+See the [task type catalog](../../../docs/core-data-structures/tasks.md) and [runtime Agent Note](../../../.agents/notes/implemented/architecture/2026-06-20-generic-long-running-tool-runtime.md).
 
 ## Model Experience
 
 Indirectly, through producer plugins and [`dsh-tool-tasks`](../tool-tasks/README.md), which render task ids, output, status, cancellation, and completion notices.
 
+#### KV Cache effect
+
+No direct invalidation; the named consumer owns any request-prefix changes.
+
 ## Known Limitations and Deferred Work
 
 - **Tasks are process-local** — durable or cross-restart execution needs a separate lifecycle.