[Bug] Auto mode avoids Read/Write tools causing file operation failures on Windows

**Bug Description**
The A/B test causing Claude not to use Read and Write tools in auto mode is leading to many errors for me. Its use of bash to orchestrate file writes often fails on Windows in particular, and even if it appears to work there are mixed CR/LF issues.

**Environment Info**
- Platform: win32
- Terminal: windows-terminal
- Version: 2.1.241
- Feedback ID: 898254ed-36c8-47d3-a53b-e4ee401b98c6

No source file or test is named. Reproduce auto mode on win32 in Windows Terminal 2.1.241, then trace why it selects bash instead of the Read and Write tools; done when file operations use those tools reliably without mixed CR/LF behavior on Windows.

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