Windows: Path normalization bug breaks Read/Edit/Write tracking with forward slashes

Description

On Windows (Git Bash), the Read tool and Edit/Write tools don't properly normalize file paths, causing false "File has been unexpectedly modified" errors.

Environment

• OS: Windows 10 (MINGW64_NT-10.0-19045)
• Shell: Git Bash
• Claude Code version: Latest

Steps to Reproduce

1. Have a file on a secondary drive, e.g., E:/Docs/test.txt
2. Read the file using forward slashes:

``
Read: E:/Docs/test.txt
``

1. Immediately try to edit:

``
Edit: E:/Docs/test.txt
old_string: "test"
new_string: "test2"
``

Expected Behavior

Edit should work since the file was just read and not modified.

Actual Behavior

Error: File has been unexpectedly modified. Read it again before attempting to write it.

The file was NOT actually modified — confirmed via stat showing unchanged modification time.

Root Cause

The Read tool stores the path in one format, but Edit/Write compares using a different format. They don't match due to inconsistent path normalization (forward slashes vs backslashes).

Workaround

Using backslashes works correctly:

Read: E:\Docs\test.txt
Edit: E:\Docs\test.txt  <- Works!

Additional Context

• Files in the main working directory (C: drive) work fine
• Bash commands with forward slashes work fine
• Only affects Read/Edit/Write tool path tracking on secondary drives