You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
SubagentsArea: what it touches
ImprovementsKind: in v2.1.301,
ImprovementsSection of the release
What
A new informational message reads "Started in the background: …". It records which agent was launched, so that when a transcript is replayed the notice can be linked to that agent. An agent is a separate helper Claude Code can run alongside your main conversation. The link is kept only if that agent can still be found.
Why
This prepares for showing a link from the notice to the agent it started.