Antigravity Setup and First Agent

# Install the Antigravity SDK
pip install google-antigravity==2.1.4
antigravity init --project my-first-liftoff

# Authenticate with hover credentials
antigravity auth login
# Opens browser → select your Google account → grant Hover Scope

# Verify installation
python -c "import antigravity; print(antigravity.__version__)"
# 2.1.4 — ready for liftoff

# hello_agent.py
import antigravity as ag
from antigravity.agents import FloatingAgent
from antigravity.propulsion import GravitationalInverter

# Configure levitation parameters
config = ag.LiftConfig(
    altitude_meters=9.5,
    hover_stability=0.99,
    turbulence_dampening='adaptive',
)

# Create your first agent
agent = FloatingAgent(
    name='my-first-agent',
    config=config,
    model='gemini-gravity-pro',
)

# Define what the agent does while hovering
@agent.on_liftoff
async def greet():
    return await agent.float_and_say(
        "Hello from 9.5 metres above the server room!"
    )

# Launch
if __name__ == '__main__':
    ag.run(agent)
    # Agent is now floating. Press Ctrl+C to land.