Get it here: Antigravity VS Code Extension Toolkit
One of the biggest annoyances with Antigravity/VSCodium is the extension gap. Open VSX lags behind, some extensions are missing entirely, and the ones that do exist are sometimes published by unverified third parties. But if you switch your marketplace setting to Microsoft's, all your existing Open VSX extensions stop updating. Lose-lose.
agvs lets you have both. It downloads .vsix packages directly from the VS Code Marketplace and installs them via CLI. Your Open VSX marketplace stays untouched, those extensions keep updating normally. You just also get the real, current versions of anything that's lagging or missing.
# install claude code v2.1.81 from VS Code Marketplace instead of Open VSX's older v2.0.13.
agvs -i anthropics.claude-code
agvs -s # check for updates & install them