You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Background AgentsArea: what it touches
ImprovementsKind: in v2.1.232,
ImprovementsSection of the release
What
When a background agent was running or had just finished as the previous session exited, the startup notice now handles web-fetch launches separately. They have no worktree or output file to check, so the notice tells you to message the agent for its report instead of looking for partial work.
Evidence
Send it a message with SendMessage to get its report.
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's release notes agreeType @ in the prompt to mention another Claude session by name; Claude then uses SendMessage to reach that session directly
