pi-antigravity-oauth

Pi extension that registers the Google OAuth provider for Antigravity:

Install

# Install from npm
pi install npm:@yofriadi/pi-antigravity-oauth

# Or load a local clone for a single session
pi -e /path/to/pi-extensions/packages/pi-antigravity-oauth

Provider id	Display name	Endpoint	Callback port
google-antigravity	Antigravity (Gemini 3, Claude, GPT-OSS)	https://daily-cloudcode-pa.sandbox.googleapis.com	51121

Models

google-antigravity

• claude-opus-4-5
• claude-opus-4-6
• claude-sonnet-4-5
• claude-sonnet-4-6
• gemini-2.5-flash
• gemini-2.5-flash-lite
• gemini-2.5-pro
• gemini-3-flash
• gemini-3-pro
• gemini-3.1-flash-image
• gemini-3.1-flash-lite
• gemini-3.1-pro
• gemini-3.5-flash
• gpt-oss-120b
• tab_flash_lite_preview
• tab_jump_flash_lite_preview

Login flow

The extension runs a standard PKCE OAuth dance against https://accounts.google.com/o/oauth2/v2/auth:

1. Generate a verifier + SHA-256 challenge.
2. Start a local callback HTTP server on the provider's port.
3. Open the auth URL with access_type=offline and prompt=consent so we get a refresh token.
4. Wait for the callback (or for a manual paste of the redirect URL).
5. Exchange the code for tokens at https://oauth2.googleapis.com/token.
6. Resolve the user's Cloud Code Assist project ID.
7. Persist credentials to Pi's auth storage.

/login will prompt for authorization. Complete the consent screen in the browser, return to the terminal. If the callback fails or you cancel, you can paste the redirect URL into the terminal prompt and the extension will pick it up from there.

Credentials shape

The provider encodes the OAuth credentials as:

{ "token": "<access_token>", "projectId": "<google_cloud_project_id>" }

The runtime decodes this and passes the access token to the Cloud Code Assist API as Authorization: Bearer <token>.

Source

This is a source-only package. Pi loads ./src/index.ts directly via jiti — there is no build step.