Bug: tmpclaude-*-cwd temp files accumulate in project root (Windows)

Description

Claude Code is creating temporary files named tmpclaude-{hash}-cwd in the project root directory. These files are not being cleaned up when shell sessions end, causing them to accumulate.

Files Created

tmpclaude-a78a-cwd
tmpclaude-72cc-cwd
tmpclaude-2fe9-cwd
tmpclaude-db54-cwd

Each file contains only the current working directory path (e.g., /e/Projects/idpf-praxis).

Steps to Reproduce

1. Open Claude Code on Windows
2. Claude will run several Bash commands during a session
3. Check the project root directory for tmpclaude-* files

Expected Behavior

• Temporary files should be cleaned up when the shell session ends, OR
• Temporary files should be created in a system temp directory (e.g., $TEMP or /tmp), not the project root

Actual Behavior

• Multiple tmpclaude-{hash}-cwd files accumulate in the project root
• Files persist after the session ends
• Files appear as untracked in git status

Environment

• OS: Windows 10/11
• Shell: Git Bash
• Claude Code Version: Latest (as of January 12, 2026)

Workaround

Add tmpclaude-* to .gitignore to prevent git status clutter:

echo "tmpclaude-*" >> .gitignore

Suggested Fix

1. Create these files in a system temp directory instead of the project root
2. Implement cleanup logic when shell sessions terminate
3. Use a single file per Claude Code instance rather than per-subprocess