You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
HooksArea: what it touches
ImprovementsKind: in v2.1.292,
ImprovementsSection of the release
What
The SendMessage tool lets Claude send a message to another session or agent. The copy of each call that hooks and the session transcript see now carries a recipient_kind field, which is one of session, main, agent or name. Hooks are your own scripts that Claude Code runs when a tool is used. Before, that copy held only the type, the recipient and the content.
Some fields are now removed from that copy, and the types of the values are checked.
Messages to cloud sessions and Remote Control sessions are now delivered through a new routing path.
Why
If you have hooks or tools that read SendMessage calls, they now get a field saying what sort of recipient a message is for, and they may see fewer fields than before.
