Claude Code v2.1.20 ·
SendMessageTool for Teammate Communication
EntryKind: in v2.1.20,
ChangesSection of the release
What
New SendMessageTool replaces previous teammate messaging implementation with clearer protocol separation.
Usage
Internal tool used by agents in swarm mode.
Details
- Handles message, broadcast, request, and response types
- Protocol subtypes for shutdown and plan approval workflows
- Better error messages for missing parameters
- Improved in-process teammate abort handling
Evidence
Tool definition at line 448126 (SendMessageTool: () => tT2) with logging prefix [SendMessageTool] at lines 448249, 448275, 448284
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
See this entry in the whole of v2.1.20 →
