You'll notice
Sending a message to a renamed peer session now suggests its new name in the error
What
When Claude Code tries to send a message to another peer or agent session by name and can't find that name, the error message now checks whether that session was renamed, and if so, tells you its current name.
Why
This makes it easier to recover from a "session not found" error caused by a rename, since the message now points directly to the name to use instead.