dsh-win-multi-bash: A DSH plugin that adds Git Bash and WSL Bash support to DeepSeek Harness

What Does It Do?

dsh-win-multi-bash is a Windows multi-bash DSH plugin for DeepSeek Harness that adds Git Bash and WSL Bash support. It solves the limitation of a single shell seat on Windows by routing ctx.shell across Git Bash, WSL, and pwsh via a shell-select executor, keeping pwsh as the default until a bash-family tool is called. Core capabilities include git_bash and wsl_bash model tools, automatic Git Bash discovery, and lazy sandbox probing.

Core Features

• git_bash tool: uses Git for Windows' MSYS bash, supporting request.shell: 'git-bash'.
• wsl_bash tool: uses the WSL distro's Linux userland, supporting request.shell: 'wsl-bash'.
• shell-select executor: occupies the single ctx.shell seat and routes to a backend based on request.shell ?? default, with default staying pwsh.
• Automatic Git Bash discovery: searches explicit bashPath, git.exe layout directories, Program Files layouts on fixed drives, bash.exe on PATH, and the registry install path, rejecting symlinks and WSL aliases.
• Sandbox behavior: pwsh uses a windows-acl restricted-token runner, wsl_bash uses bwrap, and git_bash degrades to unconfined on probe failure, with probe verdicts cached.

How to Use This Plugin?

After enabling it in DSH, just call the git_bash or wsl_bash tool, and the plugin routes to the appropriate backend. For sandboxing, with sandbox: auto, Git Bash probes the windows-acl runner and WSL probes bwrap; if you explicitly set sandbox: bwrap and bubblewrap is missing, it fails loudly on the first wsl_bash command. Note that git_bash usually cannot be sandboxed, so for sensitive operations prefer pwsh or wsl_bash.