[BUG] Cowork Write tool path drift

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?

Please refer to attached PDF with detailed issue description. I use multiple models (Opus and Sonnet).

cowork-write-tool-path-drift-github-issue-2026-05-13.pdf

What Should Happen?

Please refer to the PDF with detailed description.

Error Messages/Logs

Steps to Reproduce

Please refer to the PDF with detailed description.

Claude Model

Not sure / Multiple models

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude windows app 1.7196.0 (2dbd78) - Cowork, model mostly Claude Opus 4.7

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Other

Additional Information

_No response_