[BUG] Is `/sandbox` command supported on WSL2? Getting "Unknown slash command: sandbox" error

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?

The /sandbox slash command returns Unknown slash command: sandbox error when attempting to use it in Claude Code on WSL2.

According to the documentation (https://github.com/anthropic-experimental/sandbox-runtime?tab=readme-ov-file#platform-support), /sandbox should be available on macOS and Linux (with bubblewrap installed). However, it's unclear whether WSL2 (Windows Subsystem for Linux) is considered a supported Linux environment for this feature.

What Should Happen?

Need clarification on whether WSL2 is supported for the /sandbox command, or if there are additional configuration steps required for WSL2 environments.

Error Messages/Logs

Unknown slash command: sandbox

Steps to Reproduce

1. Install Claude Code 2.0.24 on Linux (WSL2)
2. Attempt to run /sandbox command in Claude Code
3. Observe error: Unknown slash command: sandbox

Additional verification performed:

• Installed required dependencies: sudo apt install bubblewrap socat ripgrep
• Restarted Claude Code
• Attempted to run /sandbox command again
• Same error persists

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.24

Platform

Google Vertex AI

Operating System

Windows

Terminal/Shell

WSL (Windows Subsystem for Linux)

Additional Information

_No response_