[BUG] Extension opens terminal when toggling Fast Mode (Antigravity IDE)

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?

Claude version 2.1.81, Antigravity version 1.20.6, VS Code OSS version 1.107.0

When I I type /fast into the user interface of Claude Code, it opens the terminal automatically and errors out. Same when I "click" the slash command, I've added a space before /fast...same issue. I've uninstalled Claude, reinstalled it. And everything else people recommended.

What Should Happen?

Claude should enter fast mode with Opus. Yes, I am in Opus when I try to put into fast mode.

Error Messages/Logs

Here is the error in the teminal: PS C:\Users\WilliamKnudson\OneDrive - Dynamo Construction\Dynamo\015 - Estimating> claude /fast
claude : The term 'claude' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:1
+ claude /fast
+ ~~~~~~
    + CategoryInfo          : ObjectNotFound: (claude:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

Steps to Reproduce

1. Type /fast in the UI of Claude Code in the Antigravity IDE. Hit enter or tab, either one automatically opens the termina.

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.81

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_