You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Background JobsArea: what it touches
ImprovementsKind: in v2.1.321,
ImprovementsSection of the release
What
A background session is one that keeps running without you watching it. When one takes over an existing conversation, Claude Code now reads the saved conversation and sets up again any scheduled or repeating prompts it finds there, so they fire as before.
If it cannot set one up again, it shows a notice saying the prompt was not re-armed because the conversation does not show it as scheduled and still pending, and asks you to schedule it again.
Why
Scheduled and looping prompts carry over when work moves to a background session, and you are told when one is dropped so you can set it up yourself.