A subagent watching a published artifact can now surface a publish_adopted live-subscription state: when the subagent holds no watch on the artifact but the launching session will take over notifications once the subagent finishes, the handoff re-arms the subscription for the parent session and emits subagent_publish_adopted telemetry. This is wired to fire on subagent completion and is consumed by the artifact tool's status text.
Subagent artifact live-watch handoff on agent completion
When a subagent finishes, its artifact watch is re-armed for the launching session and reported as publish_adopted.
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
ImprovementsKind: in v2.1.259,
ImprovementsSection of the release