You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
AgentsArea: what it touches
ImprovementsKind: in v2.1.321,
ImprovementsSection of the release
What
A subagent is a separate helper agent that Claude Code can start to work on part of a task, sometimes in the background. Claude Code now has a notice for when such an agent is picked up again. It reads: "It is being resumed automatically from its saved transcript, which may lack its last steps." A transcript here is the saved record of what the agent said and did.
Separately, the information Claude Code records when you type a command it does not recognise can now include a reserved name.
Why
The notice is written for the model. It lets Claude know that a background agent was resumed automatically and that its last few steps may not have been saved.
