[BUG]

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?

When I open plan in VSCode via /plan open, the "status marker" (or whatever it's called) shows up as if agent starts thinking. What's worse is that the whole bottom area starts spamming keys that are not coming from me:

<img width="2540" height="765" alt="Image" src="https://github.com/user-attachments/assets/bc3cc1b5-a2aa-4856-964f-95bdf5acde4e" />

The only way to stop it is Ctrl+C that closes the whole instance. If not doing that, the whole screen becomes this madness, even replacing statusline/mode rows.

What Should Happen?

Well... Neither of those should happen.

• /plan open is a TUI command that shouldn't even show agent thinking (in screenshot case, Jitterbugging).
• Definitely should not spam with these artifacts.

Error Messages/Logs

N/A

Steps to Reproduce

1. Start plan session, create any plan.
2. Request agent to not exit plan mode so you can open it.
3. /plan open
4. Refocus terminal.

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.162 (Claude Code)

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Other

Additional Information

I'm on Ubuntu 24.04.4 LTS, using zsh as my shell.