Use Google Antigravity's Claude Opus model in Claude Code.
AGCC bridges your Google Antigravity account to Claude Code, giving you full access to Claude Opus through the same infrastructure Google uses internally — including its Language Server binary for authentication and API communication.
npm install -g agccagcc startThen launch Claude Code as usual. AGCC handles the rest — OAuth login, request translation, and streaming responses.
AGCC runs a local Anthropic-compatible API server and a MITM proxy in front of Google's Language Server. Rather than reimplementing the Google API client, it uses the same Language Server binary that ships with the official IDE extension, ensuring full compatibility with Google's auth flow and API protocol.
Claude Code → AGCC (Anthropic API) → Language Server → Google API (Claude Opus)
Requests are translated between Anthropic and Gemini formats on the fly, including tool calls, thinking blocks (with signature passthrough), and streaming.
- Node.js ≥ 18
- macOS (ARM) or Linux (x64)
- A Google account with Antigravity access
MIT