[BUG] Claude Code extension in Antigravity not auto-updating on Mac

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?

I am using Antigravity 1.20.5 on MacOS and I installed the Claude Code extension three weeks ago - this gave me 2.1.47. The auto-update box is checked, should have 2.1.77 as of today, it's stuck on 2.1.47. I've turned update on and off, enabled/disabled the extension, restarted Antigravity, really not keen on reinstalling it due to maybe losing what I'm currently doing. Antigravity reinstall is how I got the 2.1.47 update, this was incidental to fixing other Antigravity related bugs.

What Should Happen?

The extension ought to check periodically, at a minimum when Antigravity is started, and update Claude Code if possible.

Error Messages/Logs

Steps to Reproduce

Own a Mac.

Install Antigravity

Enable Claude Code extension

Wait for Claude Code to ship an update, notice the auto-update feature of the extension is broken.

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.47

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Other

Additional Information

_No response_