Antigravity with Stable Baseline.

Before you begin

You'll need a Stable Baseline API key. Visit the MCP setup guide to create one from your workspace settings. Keys are prefixed sta_… and shown only once.

Step 1 · Add the MCP server

• Open the Agent Panel in Antigravity
• Click the … (more) menu
• Select MCP Servers → Manage MCP Servers
• Click Edit configuration to open mcp_config.json
• Add the Stable Baseline server configuration using one of the options below

Option A: remote HTTP (try this first)

{
  "mcpServers": {
    "sb": {
      "url": "https://api.stablebaseline.io/functions/v1/cloud-serve/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_API_KEY"
      }
    }
  }
}

Option B: via mcp-remote bridge (fallback)

If Option A doesn't work, use the mcp-remote npm package as a stdio bridge:

{
  "mcpServers": {
    "sb": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://api.stablebaseline.io/functions/v1/cloud-serve/mcp",
        "--header",
        "Authorization: Bearer YOUR_API_KEY"
      ]
    }
  }
}

Replace YOUR_API_KEY with your actual Stable Baseline API key in whichever option you use. After saving the configuration, the server should appear in the MCP Servers list with a connected status.

Step 2 · Generate your documentation

Once the MCP server is connected, open Antigravity's AI agent and type:

Run the sb-setup prompt from the sb server

The AI agent walks you through an interactive setup process to generate documentation for your project.

What sb-setup does — the 9-step process

• Verifies MCP connection — Confirms the Stable Baseline server is reachable and authenticated
• Resolves workspace & project — Finds or creates your Stable Baseline workspace and project
• Scans your codebase — Analyses project structure, tech stack, dependencies, and architecture
• Checks for existing docs — Detects if documentation already exists in Stable Baseline and offers to augment, replace, or cancel
• Creates folder structure — Organises documentation into logical folders matching your codebase
• Generates documents — Writes comprehensive docs for each area of your codebase
• Adds diagrams — Creates architecture and flow diagrams using Mermaid, PlantUML, or other supported formats
• Configures AGENTS.md — Adds auto-sync rules to your project's AGENTS.md file (augments existing content — never removes what's already there)
• Summary & next steps — Provides a summary of everything created with links to view in Stable Baseline

What gets documented

• Architecture — High-level system design, component relationships, data flow
• API & Integrations — Endpoints, external services, authentication flows
• Data Model — Database schemas, relationships, migrations
• Frontend — Component hierarchy, state management, routing
• Backend — Server logic, middleware, business rules
• DevOps — Build pipeline, deployment, environment configuration
• Auth & Identity — Authentication, authorisation, user management

The exact structure is determined dynamically based on your codebase — no two projects get the same output.

How auto-sync works

After setup, your AGENTS.md file contains rules that tell Antigravity's AI agent when to update documentation:

Whenever the AI agent modifies files matching these patterns, it automatically updates the corresponding Stable Baseline documentation via the sb-sync prompt.

File structure

Your Stable Baseline Project
├── Architecture/
│   ├── High Level Overview
│   └── System Architecture Diagram
├── Frontend/
│   ├── Component Hierarchy
│   ├── State Management
│   └── Routing & Navigation
├── Backend/
│   ├── API Endpoints
│   ├── Business Logic
│   └── Middleware & Auth
├── Data Model/
│   ├── Database Schema
│   └── Entity Relationships
└── DevOps/
    ├── Build & Deploy
    └── Environment Config

This is an example. Your actual structure will be tailored to your specific project.

Try it

Once setup is complete, try these prompts in Antigravity's AI agent:

Regenerate documentation

To regenerate your entire documentation from scratch:

Run the sb-setup prompt from the sb server

Setup will detect existing documentation and ask whether you want to augment (add to existing), replace (start fresh), or cancel.

Other prompts available