tau

README

tau

A coding agent for your terminal. tau is a Go reimplementation of Pi — same architecture, same feature surface, same minimalist philosophy — shipped as a single static binary with no runtime dependencies.

Status: early development. tau is being built in phases toward parity with Pi v0.82.1. Nothing here is usable yet.

Goals

• Single binary. No Node, no npm. brew install or download one file.
• Pi parity. The agent loop, session trees, providers, extensions, themes, skills, and modes you know from Pi, in idiomatic Go.
• Easy migration. tau reads your existing ~/.pi state (sessions, settings, auth, models) and imports it. Existing Pi TypeScript extensions run against tau via a host shim.
• Libraries first. ai, agent, session, tools, and extension are importable Go packages, not just internals of the CLI.

Install

brew install ihavespoons/tap/tau
# or
go install github.com/ihavespoons/tau/cmd/tau@latest

License

MIT. tau is derived from Pi, MIT © 2025 Mario Zechner — see THIRD-PARTY-NOTICES.md.