There are many agent harnesses. But this one is yours.
Pi is a minimal coding agent harness. Use it right here in your browser — no install, no setup, no terminal.
Sign in with Google to start your first session in the browser
A coding agent that adapts to you
Customize Pi with extensions, skills, prompt templates and themes — or just use it in your browser.
15+ providers, hundreds of models
Anthropic, OpenAI, Google, xAI, MiniMax, OpenRouter and more. Switch models mid-session.
Skills and extensions
Bundle capabilities as Pi packages and load them on demand. Keep the context window lean.
Tree-structured history
Sessions are stored as trees. Jump back to any point and continue from there.
Four modes
Interactive, print/JSON, RPC and SDK — from the browser to your own apps.
Context engineering
AGENTS.md, SYSTEM.md, compaction and dynamic context put you in control.
Share sessions
Export to HTML or upload to a gist and get a shareable URL that renders it.
Start using Pi in three steps
No terminal, no install — just your browser.
Sign in with Google
One click to create your account and start a session.
Open the chat
Ask Pi to read, write, edit and run tasks for you.
Use it anywhere
Sessions are saved, so you can pick up where you left off.
Frequently Asked Questions
Everything you need to know about using Pi in the browser.
Ready to start coding with Pi?
Sign in with Google and run your first session in the browser.