[BUG] Claude Code is opening a new window on every action

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 used Claude Code 1.x.y it was fast.
When Claude Code 2.0.0 went out is was also fine.

Now with Claude Code 2.0.1, every time it wants to do something, it opens a bash window (GitBash) and every thing is now slow as hell.
Moreover, since the window takes focus, I can't do anything else while Claude Code is working: my other application always loses focus.

<img width="739" height="443" alt="Image" src="https://github.com/user-attachments/assets/51a7d921-5931-407d-9745-16c489699b3e" />

What Should Happen?

Claude should use internal tools, not external tools.

Error Messages/Logs

Steps to Reproduce

1. Open VSCode.
2. Ask Claude something.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.0.0

Claude Code Version

2.0.1

Platform

Other

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

Few weeks ago I tried the "installable version of Claude" in beta and it did the same thing.
I reverted back to the npm version.