Antigravity Cortex

Documentation | Repository

The central "brain" and standard library for Antigravity-powered agents. This package distributes shared Skills, Workflows, and Rules that are injected into project workspaces to ensure consistent, high-quality engineering.

Architecture

This package manages the .agent/ directory in your project using a Manifest-based Sync system.

• Skills (.agent/skills/): Capabilities the agent can pull in on demand (e.g., git-worktree, data-migration-expert).
• Workflows (.agent/workflows/): Step-by-step guides for specific tasks (e.g., /deploy, /plan).
• Rules (.agent/rules/): Persistent context and formatting rules (e.g., 00-constitution.md).
• Browser Agent: Includes agent-browser as a native dependency.

Installation

To add Antigravity Cortex to your project:

# 1. Install the package (Dev Dependency recommended)
npm install -D ag-cortex

# 2. Initialize the brain
# This copies assets to .agent/, creates a manifest, and automatically installs required browser binaries.
npx ag-cortex install

Note

Linux Users: If you encounter errors about missing shared libraries, you likely need to install system dependencies. Run:

sudo npx agent-browser install --with-deps

Usage

Updating Assets

When a new version of ag-cortex is released, update your local assets safely:

# 1. Update the package
npm install -D ag-cortex@latest

# 2. Sync the assets
# This will update modified files and prune orphaned files (keeping your custom files safe).
npx ag-cortex update

Checking Status

Verify your installation and dependencies:

npx ag-cortex doctor

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Forked from Compound Engineering Plugin.