[BUG] Claude Code creates persistent temporary files tmpclaude-* in the workspace

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?

<img width="259" height="110" alt="Image" src="https://github.com/user-attachments/assets/99e69784-9541-41e5-b569-2f4ed602dd90" />

Description: I noticed that while using Claude Code, several temporary files with the prefix tmpclaude- are automatically generated in my project directory and are not being cleaned up.

What Should Happen?

Expected Behavior: Temporary files should either be created in a system temp directory or be automatically deleted after the process finishes.

Error Messages/Logs

Steps to Reproduce

Steps to Reproduce:

1.Start Claude Code in a project directory.

2.Perform tasks (e.g., editing files or running commands).

3.Observe the file tree.

Observed Behavior: Files like tmpclaude-0e27-cwd, tmpclaude-9f7f-cwd, etc., appear in the file explorer (marked as untracked "U" in Git).

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.5

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_