[BUG] File locking on windows

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?

I'm doing vibe coding with Claude. At random intervals, Claude crashes and I have to start it up again.
I've deleted the .claude\debug directory and will see if the problem persists.
I'm using 2.0.75 (Claude Code), on Windows 11 Pro, OS build: 26200.7462 and have one Claude session going via PhpStorm (2025.2.5, Build #PS-252.28238.9, built on November 19, 2025).

What Should Happen?

Shouldn't crash.

Error Messages/Logs

Error: EBUSY: resource busy or locked, open 'C:\Users\RickRetzko\.claude\debug\52247b9f-494e-4db2-b6b7-9b7f59d62869.txt'
    at Object.writeFileSync (node:fs:2427:20)
    at Module.appendFileSync (node:fs:2509:6)
    at file:///C:/Users/RickRetzko/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:9:1288
    at oI (file:///C:/Users/RickRetzko/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:8:8084)
    at Object.appendFileSync (file:///C:/Users/RickRetzko/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:9:1139)
    at writeFn (file:///C:/Users/RickRetzko/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:9:28619)
    at Timeout.X [as _onTimeout] (file:///C:/Users/RickRetzko/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:9:27992)

Steps to Reproduce

1. Run prompts until it breaks?

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.0.75 (Claude Code)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

PhpStorm (2025.2.5, Build #PS-252.28238.9, built on November 19, 2025)