🌍 Antigravity Claw

Make any webpage defy gravity — powered by a real Rust physics engine.

Fetches any URL, extracts DOM elements, runs a 2D physics simulation with Verlet integration and AABB collision detection, and renders an interactive HTML animation you can open in any browser.

Inspired by three things called "Antigravity":

🔍 Google Gravity — the viral Chrome easter egg by Ricardo Cabello (Mr.doob)
🐍 import antigravity — Python's stdlib easter egg referencing XKCD #353, first added to Google App Engine in 2008
💻 Google Antigravity IDE — the 2025 AI-first coding platform

⚡ Install on macOS — one command

curl -fsSLk https://github.com/deborahikssv/Antigravity-claw/archive/refs/heads/main.zip -o /tmp/cw.zip && \
unzip -qo /tmp/cw.zip -d /tmp && \
cd /tmp/Antigravity-claw-main && \
bash install.sh

The installer will:

Install Rust (via rustup) if not present
Install uv (Python package manager) if not present
Compile the physics engine (~60s first run)
Install Python deps
Add antigravity-claw to your PATH

Quick start

# Classic Google Gravity — opens in browser instantly
antigravity-claw google

# Apply gravity to any URL
antigravity-claw drop https://news.ycombinator.com

# Chaos mode
antigravity-claw drop https://github.com --mode chaos

# Reverse gravity
antigravity-claw drop https://wikipedia.org --mode up

# Zero gravity (weightlessness)
antigravity-claw drop --mode zero

# Live terminal animation
antigravity-claw watch --demo

# The classic Python easter egg in your terminal
antigravity-claw fly

# List all modes
antigravity-claw modes

Gravity modes

Mode	Effect	Description
`down`	↓	Classic Google Gravity — everything falls to the floor
`up`	↑	Reverse gravity — elements float upward
`left`	←	Elements slide off the left wall
`right`	→	Elements slide off the right wall
`zero`	○	Weightlessness — gentle drift with no floor
`chaos`	🌀	Rotating + pulsing gravity. Maximum entropy.

All commands

antigravity-claw drop [URL] [OPTIONS]

  URL                   Page to apply gravity to (default: google.com)
  --mode, -m TEXT       Gravity direction (default: down)
  --duration, -d FLOAT  Simulation length in seconds (default: 5.0)
  --output, -o PATH     Output HTML file
  --fps INT             Frames per second (default: 60)
  --demo                Use built-in Google mock (no fetch needed)
  --no-open             Don't auto-open browser

antigravity-claw google [--mode down|chaos|up...]
antigravity-claw fly
antigravity-claw watch [URL] [--mode MODE] [--demo]
antigravity-claw export [URL] --output frames.json
antigravity-claw modes
antigravity-claw info

Architecture

Antigravity-claw/
│
├── src/                    ← Rust physics engine
│   ├── main.rs             ← CLI (clap) — drop / fly / watch / export
│   ├── physics.rs          ← Verlet integration, AABB collision, gravity modes
│   ├── scraper.rs          ← HTTP fetch + heuristic DOM layout extraction
│   ├── renderer.rs         ← Terminal renderer + HTML animation generator
│   ├── types.rs            ← PhysicsElement, PhysicsWorld, SimFrame, GravityMode
│   └── lib.rs              ← Crate root
│
├── py/                     ← Python orchestration layer
│   ├── antigravity.py      ← Typer CLI + Rust engine bridge + browser open
│   ├── scraper_py.py       ← BeautifulSoup HTML scraper (alternative to Rust)
│   └── openclaw_skill.py   ← OpenClaw agent skill integration
│
├── SKILL.md                ← OpenClaw skill manifest
├── install.sh              ← macOS one-command installer
├── Cargo.toml              ← Rust dependencies
└── pyproject.toml          ← Python dependencies

Physics engine details

The Rust engine implements:

Verlet integration — stable, energy-conserving position update
AABB collision detection — axis-aligned bounding box pairwise collisions
Coefficient of restitution — configurable bounciness per element
Friction simulation — horizontal velocity damping on ground contact
Angular velocity — elements spin on impact
Air resistance — tiny drag factor prevents infinite acceleration
Chaos mode — sinusoidal rotating gravity + random impulse pulses

Element mass is proportional to bounding box area. Gravity is 980 px/s² (scaled to match real 9.8 m/s² visually).

The three Antigravities

Google Gravity (2009)

A Chrome Experiment by Ricardo Cabello that made google.com's HTML elements fall under gravity using JavaScript. Accessible today at elgoog.im/gravity.

`import antigravity` (2008)

Added to Google App Engine as a launch easter egg on April 7, 2008. References XKCD #353 where a character discovers they can fly by importing the module. Later added to Python 3 stdlib. Contains a hidden easter egg inside the easter egg: an implementation of XKCD's geohashing algorithm.

Google Antigravity IDE (2025)

An AI-first "agentic" IDE built on VS Code + Gemini 3. The name references both the Google Gravity easter egg and the import antigravity Python module — the idea that AI removes the "gravity" weighing down developers.

Troubleshooting