[BUG] Unable to use Checkpoint in claude GUI, double esc not working, /rewind command not found

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?

Trying to use rewind through either slash command or double esc in the GUI interface on claude 2.0.35 in cursor, not working

<img width="974" height="499" alt="Image" src="https://github.com/user-attachments/assets/3d9297ae-dba0-44c7-8756-07c7582ee4f6" />

Works properly in terminal though:

<img width="1975" height="605" alt="Image" src="https://github.com/user-attachments/assets/8f03503d-426a-4e26-ac9f-8aeabe0480fe" />

I searched for existing issues and in an earlier post says it is already fixed after 2.0.5

What Should Happen?

claude code GUI brings up rewind interface for selecting an earlier checkpoint

Error Messages/Logs

Steps to Reproduce

win11, cursor 2.0.64 (vscode 1.99.3)

Claude Model

Sonnet (default)

Is this a regression?

No, this never worked

Last Working Version

terminal version

Claude Code Version

2.0.35

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_