[BUG] /branch something-with-a-dash doesn't work

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

I received an error when running /branch something-support. When I changed it to /branch something_support it worked.

What Should Happen?

/branch something-support. should work.

Error Messages/Logs

⎿  Failed to branch conversation: No messages to branch

Steps to Reproduce

Mentioned above.

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.181

Platform

Google Vertex AI

Operating System

Other Linux

Terminal/Shell

Other

Additional Information

_No response_