[BUG] Bash task/monitor in Sandbox mode creates empty .dotfiles

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?

For some reason Claude Code is generating empty dotfiles, I believe when executing Bash tasks and monitoring them, according to previous, _locked_ bug reports:

• https://github.com/anthropics/claude-code/issues/17087
• https://github.com/anthropics/claude-code/issues/17258

My claude conversation from a state of no dotfiles in the repo:

❯ monitor it

● Bash(docker logs -f 40a6a39708b4 2>&1)
  ⎿  Running in the background (↓ to manage)

● Monitor(<...>)
  ⎿  Monitor started · task bvxim3ba5 · persistent
● Monitor armed. Streaming via beb8xmnni.

And then I see at the bottom:

❯ 
────────────────────────────────────────────────────────────────────────────────────────────
  1 shell, 1 monitor · ↓ to manage

And looking in the repo again

$ git status
On branch <>
Your branch is ahead of 'origin/<>' by 1 commit.
  (use "git push" to publish your local commits)

<...>

Untracked files:
  (use "git add <file>..." to include in what will be committed)
	.bash_profile
	.bashrc
	.gitconfig
	.idea
	.mcp.json
	.profile
	.ripgreprc
	.vscode
	.zprofile
	.zshrc

no changes added to commit (use "git add" and/or "git commit -a")

This happens consistently. I have not tried it outside of sandbox mode.

What Should Happen?

As Claude itself said:

The dotfiles in the working tree are untracked and unrelated.

🙂

Error Messages/Logs

Steps to Reproduce

1. Get claude to run a bash task
2. Observe dotfiles in your repository (ls -a or git status)

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.126 (Claude Code)

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

iTerm2

Additional Information

This is over SSH.