No Antigravity compatibility

I want to install this extension but can't get work in antigravity!

<img width="495" height="144" alt="Image" src="https://github.com/user-attachments/assets/6b6ac1e3-bcfb-4d35-bbaa-a43c134a320e" />

Steps to Reproduce:

1. open antigravity
2. enter vscode marketplace urls
