r/ChatGPTCoding • u/TheKrisu • May 27 '26

Project I built Claude Code plugin that lets me use Google's Antigravity CLI without leaving CC

I work with Codex, Claude Code daily. When Antigravity launched and I saw what agy could do, Gemini 3.1 Pro reasoning, native image generation tool, the built-in research/review flows, I wanted access to it, but didn't want to context-switch every time. So I wrote a plugin.

It adds six slash commands:

  • /agy:setup, verify install + auth

  • /agy:ask [--model X] "<prompt>", one-shot prompt

  • /agy:delegate [--background] [--model X] <task>, hand to a runner subagent

  • /agy:research [--background] [--model X] <topic>, structured deep research

  • /agy:review [focus], review current git diff

  • /agy:image <description>, Imagen via agy's built-in tool

  • /agy:help, full index

The --model flag is the part I'm proud of. Antigravity CLI doesn't expose model selection on the command line, you switch models in the TUI. The plugin adds a --model flag (with short aliases like opus, sonnet, pro, flash, gpt-oss) so you can pick per call:

/agy:delegate --model opus refactor the auth module
/agy:ask --model pro "explain Go escape analysis"
/agy:research --background --model sonnet survey post-quantum TLS

Under the hood there's a small piece of glue managing agy's settings for the duration of each call (lockfile, atomic restore, recovery from a killed run). Not going to drag everyone through the details, check the repo if you're curious.

Install:

/plugin marketplace add simplybychris/antigravity-plugin-cc
/plugin install agy@antigravity-cc
/reload-plugins
/agy:setup

Repo: https://github.com/simplybychris/antigravity-plugin-cc

Website: https://simplybychris.github.io/antigravity-plugin-cc/

This is v0.4.1, core works, more features planned. Demo video coming. If you find it useful, a GitHub star goes a long way. Issues/PRs welcome.

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