You'll notice
A subagent's pending artifact publish subscriptions are handed to the parent session when it finishes instead of being dropped.
When a subagent that initiated a live artifact publish finishes, its pending publish subscriptions are now adopted into the parent session context instead of being dropped, via a new queue of "pending subagent arms." The queue is capped, and evictions are reported through a new subagent_arm_evicted telemetry event.