pi-antigravity-acp-provider: Official ACP-Based Antigravity Integration for Pi

An introduction to pi-antigravity-acp-provider, an open-source Pi extension that routes through Google's official Antigravity ACP server, minimizing account ban

tau · October 5, 2026

#Pi #Antigravity #Google #ACP #CodingAgents #CLI

pi-antigravity-acp-provider: Official ACP-Based Antigravity Integration for Pi

An open-source extension package for the terminal-based Pi coding agent, 'pi-antigravity-acp-provider', has been released to connect Google's Antigravity models through official protocols without relying on reverse-engineered OAuth hacks. Highlighted on October 5, 2026, by Kai (@hqmank) via the GitHub repository zacbemis/pi-antigravity-acp-provider, the package bypasses fragile unofficial Cloud Code Assist login routes that have frequently triggered Google account flags and bans.

Terminal interface showing Pi coding agent connecting to Google Antigravity models via official ACP server

Image source: Kai (@hqmank) on X

Until now, most community integrations attempting to bring Antigravity models into third-party coding agents relied on reverse-engineering private internal Cloud Code Assist authentication endpoints. This approach carried notable operational risks: unauthorized login requests can result in developers' primary Google accounts being flagged or suspended. By routing directly through Google's official Antigravity ACP server, pi-antigravity-acp-provider establishes a legitimate communication bridge to Google's Antigravity models.

Account Flagging Risks in Unofficial OAuth Proxies and the Role of Official ACP

As coding agents become standard fixtures in developer toolchains, the demand for flexible model routing within a unified interface has grown substantially. While Google's Antigravity backend provides powerful code generation and reasoning capabilities, unauthorized bridges have created continuous reliability and security concerns for development teams.

  • Vulnerabilities of Reverse-Engineered Logins: According to Kai, most existing unofficial wrappers route through private Cloud Code Assist logins, which has frequently led to developers' primary Google accounts getting flagged or banned.
  • Direct Route via Google's Antigravity ACP Server: Rather than relying on private login bypasses, pi-antigravity-acp-provider communicates directly with Google's native Antigravity ACP server, which Kai notes carries very little risk of account bans.
  • Preserved Pi Workflow Ergonomics: Developers retain their full Pi workflow while Antigravity runs the model underneath.

Four-Step Installation and Browser-Based Authentication Workflow

Developers can install and configure pi-antigravity-acp-provider directly through Pi's native package management workflow.

# Step 1: Install the provider extension as an npm package inside Pi
pi install npm:pi-antigravity-acp-provider

Once installed, authentication and model activation proceed within the interactive Pi session:

  1. Initiate Official Browser Sign-In: In the Pi command prompt, enter /login and select Google Antigravity (ACP). A system browser window opens, navigating to the official Google OAuth login page.
  2. Complete Browser Sign-In: Sign in through the browser using a Google account authorized for Antigravity services.
  3. Select Antigravity Models: Run /model inside Pi to inspect the available catalog under the antigravity-acp/* namespace. Select the desired model to begin issuing coding and analysis tasks immediately through the standard Pi interface.

Prerequisites, Constraints, and Production Considerations

While routing through the official ACP server provides structural reliability, teams evaluating the integration should note several operational requirements:

  • Antigravity Service Entitlements: The extension provides a legitimate protocol transport, but does not bypass account entitlement checks. Users must ensure their Google account already holds active permissions for Antigravity services.
  • Remote and Headless Environments: Because authentication relies on a browser sign-in flow (/login → sign in through the browser), developers operating in remote or headless environments without direct browser access need to account for callback handling.
  • Account Safety and Long-Term Maintainability: By utilizing Google's official ACP interface, teams significantly reduce the risk of account penalties and breakage associated with reverse-engineered internal login endpoints.

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