[BUG] Windows 11: Git bash window pops up and steals typing focus during background operations

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?

During Claude Code operation on Windows 11, a Git bash window (C:\Program Files\Git\cmd\) repeatedly pops up and steals keyboard focus, making it impossible to type.

Environment

• OS: Windows 11
• Claude Code: v2.1.140
• Git: 2.54.0

Steps to Reproduce

1. Run Claude Code on Windows 11
2. Wait for any background git operation (auto-commit, git status check, etc.)
3. Git bash window appears and steals focus from active window

Root Cause (suspected)
child_process.spawn calls bash.exe without windowsHide: true option

Attempted Fixes (all failed)

• Changed VS Code default terminal profile to PowerShell
• Changed Windows Terminal default profile to PowerShell
• Reinstalled Git
• Set SHELL environment variable to PowerShell
• Ran claude directly from PowerShell

What Should Happen?

During Claude Code operation on Windows 11, a Git bash window (C:\Program Files\Git\cmd\) repeatedly pops up and steals keyboard focus, making it impossible to type.

Environment

• OS: Windows 11
• Claude Code: v2.1.140
• Git: 2.54.0

Steps to Reproduce

1. Run Claude Code on Windows 11
2. Wait for any background git operation (auto-commit, git status check, etc.)
3. Git bash window appears and steals focus from active window

Root Cause (suspected)
child_process.spawn calls bash.exe without windowsHide: true option

Attempted Fixes (all failed)

• Changed VS Code default terminal profile to PowerShell
• Changed Windows Terminal default profile to PowerShell
• Reinstalled Git
• Set SHELL environment variable to PowerShell
• Ran claude directly from PowerShell

Error Messages/Logs

Steps to Reproduce

1. Run Claude Code on Windows 11
2. Wait for any background git operation (auto-commit, git status check)
3. Git bash window (C:\Program Files\Git\cmd\) appears and steals keyboard focus

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.140

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_