Antigravity + Stitch Just Became UNSTOPPABLE! Build Anything FOR FREE!

Building Full-Stack AI Applications Code-Free with Anti-Gravity & Open-Source Tools

Key Concepts:

Anti-Gravity: A free AI IDE by Google powered by Gemini models, capable of autonomous code generation, file editing, terminal command execution, and browser interaction.
Google Stitch: A free UI/UX design agent for creating production-ready front-end components.
Tiger Data (Agentic PostgreSQL): A PostgreSQL database service with a free tier, offering forkable databases, persistent memory, integrated search, and agent-friendly features.
Versil: A serverless platform for deploying both front-end and back-end functions, providing scalability and zero infrastructure management.
o.js: Used for authentication within the application.
BM25: An open-source ranking function used for relevance ranking in search engines, implemented directly within PostgreSQL.
MCP (Model Connector Protocol): Facilitates better connectivity between Stitch and AI tools like Anti-Gravity.

I. Introduction: The Power of Anti-Gravity

The video highlights Google’s Anti-Gravity as a remarkably powerful, yet free, tool for building full-stack applications. It unlocks access to top-tier AI models like Gemini, enabling reasoning, multimodal understanding, and agentic workflows. The core promise is the ability to design frontends, build backends, manage databases, and automate applications faster and more efficiently – all without writing code. The presenter demonstrates this by building a personal AI search engine powered entirely by PostgreSQL.

II. Tool Stack & Setup

The application is built using a combination of free and open-source tools:

Frontend: Designed using Google Stitch, an AI-powered UI/UX design agent.
Backend: Powered by Tiger Data’s Agentic PostgreSQL, leveraging its free tier.
Authentication & Payments: Implemented using o.js and Stripe as the payment gateway.
Deployment: Handled by Versil, providing a serverless infrastructure.

Prerequisites:

Google Account (for Stitch & Anti-Gravity access)
Anti-Gravity installation (compatible with various operating systems)
o.js setup
Stripe account
Tiger Data account (free tier)
Versil account

III. Frontend Development with Google Stitch

Google Stitch is presented as a free UI/UX design agent capable of generating production-ready front-end components. The presenter emphasizes the importance of descriptive prompts to guide Stitch’s design process.

MCP Integration: Stitch’s Model Connector Protocol (MCP) allows seamless connection with Anti-Gravity, enabling iterative design changes directly from the IDE. Setting this up involves creating an API key in Stitch settings and pasting the resulting configuration into Anti-Gravity.
Design Iteration: Stitch allows for multiple iterations, variations, and component-level editing through annotations.
Code Export: Once satisfied with the design, the frontend code can be exported as a zip file for use with Anti-Gravity.

The presenter built a UI for a personal AI search assistant, focusing on a clean search bar, AI-generated answers, sources, and related queries.

IV. Backend Implementation with Tiger Data & PostgreSQL

Tiger Data’s Agentic PostgreSQL is central to the backend. Its key features include:

Agent-Friendly Design: Specifically designed for AI agents to safely interact with and manage data.
Forkable Database: Allows for testing and experimentation without affecting the production database.
Integrated Search: Offers built-in search capabilities.
Free Tier: Provides a cost-effective starting point for development.

Setup:

Create a service within Tiger Data.
Download the configuration file (Python ENV or database config).
Utilize the MCP server for streamlined AI tool integration.

Anti-Gravity, connected via the MCP, can autonomously create tables, store data, run queries, and even fork the database. The presenter demonstrated querying the database directly to confirm data insertion.

V. Implementing AI-Powered Search with BM25

A core feature of the application is its AI-powered search functionality. Instead of relying on external search systems like Elasticsearch, the presenter leverages an open-source PostgreSQL extension enabling BM25 ranking directly within the database.

BM25 (Best Matching 25): A ranking function used to estimate the relevance of documents to a given search query.
Implementation via Anti-Gravity: Anti-Gravity utilizes a detailed implementation plan to automate the setup process, including enabling the extension, creating the search table, inserting sample data, and creating the BM25 index.
Benefits: Eliminates the need for data syncing with external search systems, maintaining data integrity within PostgreSQL.

The presenter demonstrated running a search query within the SQL editor, showcasing the BM25-ranked results.

VI. Authentication, Payments & Deployment

Authentication: Implemented using o.js, allowing users to sign in with GitHub or Google accounts.
Payments: Integrated with Stripe via API keys and OAuth keys.
Deployment: Utilized Versil for serverless hosting of both the front-end and back-end functions, ensuring scalability and zero infrastructure management.

VII. Demonstration & Results

The completed application is a fully functional AI search engine with:

A user-friendly interface designed with Stitch.
A robust backend powered by Tiger Data’s Agentic PostgreSQL.
AI-powered search functionality leveraging BM25 ranking.
Authentication and payment integration.
Serverless deployment via Versil.

The presenter demonstrated the application’s ability to summarize uploaded documents and answer questions based on their content, showcasing the power of the integrated AI capabilities. The "ghost input" feature, powered by Tiger Data’s script, simulates user queries and demonstrates the search engine’s responsiveness.

Quote: “This is the quality that you get with all these different tools, especially when you power it with anti-gravity.” – Demonstrating the synergistic effect of the chosen tools.

VIII. Conclusion

The video successfully demonstrates the feasibility of building a full-stack AI application code-free using Anti-Gravity and a suite of free and open-source tools. The key takeaway is the power of AI agents, particularly Anti-Gravity, to automate complex tasks, streamline development, and unlock the potential of PostgreSQL for advanced applications like AI-powered search. The presenter encourages viewers to explore the provided links and resources to begin building their own AI-powered applications.