Cross-Session Messaging Reaches Windows in Claude Code 2.1.239
Claude Code Changelog·medium signal
Claude Code sessions on Windows can now message each other with `SendMessage` and discover each other with `ListAgents`, matching macOS and Linux. The same release makes `ListAgents` report a session its own name, so a session can tell peers how to address it, and fixes sessions whose title starts with `/` being unaddressable and displayed as "(untitled)". Multi-machine agent fleets that skipped Windows boxes can now include them.