[BUG] CTRL-O ruins all current and future (and resumed) claude sessions

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?

• 2.1.0 (Claude Code)

claude <anything> produces:

<img width="1840" height="1343" alt="Image" src="https://github.com/user-attachments/assets/0090d041-70b0-4232-928c-d6039eff7846" />

What Should Happen?

Claude should open

Error Messages/Logs

I was doing fine, pressed ctrl-o, got to that screen, now they all look like that and I cannot go back. new instances pull up that screen.

Steps to Reproduce

claude
ctrl-o (sometimes this does it)

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

2.1.0

Claude Code Version

2.1.0

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Other

Additional Information

Ubuntu 'terminal'