You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
Agent TeamsArea: what it touches
ImprovementsKind: in v2.1.323,
ImprovementsSection of the release
What
With teammates, a lead Claude Code session works with other Claude Code sessions. Teammates can run in their own terminal panes. The lead now signs every message it sends to a teammate with a key, and the teammate checks the signature. Shutdown requests and approvals are verified this way.
If Claude Code cannot create the signing key, it shows an error. The error tells you to restart Claude Code with --teammate-mode in-process, which runs teammates without panes.
Why
A teammate can now tell that a shutdown request really came from its lead, so a forged request cannot shut it down.
