Discover an extremely hardcore Rust project: Antigravity-Manager. It is not only a multi-account switcher for Google Antigravity but also a high-performance local API gateway. With it, you can convert the built-in top models of Antigravity (Gemini 3 / Claude Sonnet) into standard OpenAI interfaces for use with Cursor or Claude Code. Break IDE lock-in and maximize model computing power.

GitHub open-source project link:

This project addresses two main pain points:

1. Breaking Quotas: Automatically managing multiple Google accounts through polling to solve high-frequency call limits (429/Quota Limit) for Gemini 3 / Claude models, achieving a theoretical "unlimited refill."

2. Capability Decoupling: Extracting Antigravity's model capabilities. You don't need to be forced to use the official IDE; instead, you can call these models via a local API (localhost) with any tool supporting OpenAI format (such as VS Code plugins, Terminal CLI).

Technical implementation:

1. Architecture: Based on Tauri v2 + Rust (backend) + React (frontend), resulting in small binary size and low memory usage.

2. Principle: Uses a man-in-the-middle (Reverse Proxy) mode. It simulates the complete request headers, TLS fingerprints, and Session logic of the Antigravity client, successfully passing server-side authentication.

3. Scheduling algorithm: Built-in intelligent load balancing. When detecting that the current account triggers 503 or rate limiting, it automatically switches to a backup account within milliseconds, while optimizing Prompt Caching hit rate using Session Stickiness.

Deployment steps:

Due to the complex underlying system interactions, it is recommended to use the pre-compiled binary package:

1. Go to GitHub Releases and download the version suitable for your system (Windows/macOS/Linux).

2. Install and run, then log in with multiple Google accounts via the UI.

3. Enable the "API Server" feature to obtain the local server port (usually 8080 or similar).

4. Configure in Cursor/Open WebUI:
· Base URL:
· API Key: any (任意填写)

Risk assessment (high risk, must read):

1. Account ban risk: This is a typical violation of ToS behavior (non-official client access, quota abuse). Google can detect abnormal traffic patterns and will definitely prohibit accounts tied to core assets.

2. Stability risk: The project relies on reverse engineering Google's private APIs. If the official adjusts authentication logic (e.g., strengthens Integrity Check), the tool may immediately become invalid.

3. Security audit: As an API gateway, it handles all code and prompts. Although the code is open source, when used in enterprise internal networks, network access permissions must be restricted (default listening only on 127.0.0.1).

lbjlaq/Antigravity-Manager is a typical "hacker" tool—breaking down the walls built by big companies, allowing computing power to flow freely between different tools. Very suitable for individual developers who want low-cost access to Claude Code or need high concurrency calls to Gemini 3. Finally, a reminder: play with fire at your own risk, and please test with a secondary account.