Free and open-source
AGPL-3.0 licensed: redistribute and modify it freely. The network clause keeps hosted forks open too, so improvements flow back to everyone.
Developers
Open source, built in the open
Piranha is free software under the AGPL-3.0. Read it, run it, fork it, and send a change back — the whole system is yours to shape.
A modern web stack
FastAPI + SQLite/Postgres on the backend; React + TypeScript + Vite on the front; a Go deck agent and a Tauri desktop build. Realtime over WebSocket, typed end to end.
Anyone can contribute
Documented architecture, a thorough test suite with a 95% coverage gate, type and lint gates, and per-area guides mean a first patch is approachable. New reports, formats, and features have a paved path.
Architecture that holds
Strict layer rules — repositories, services, routers — are enforced as fitness functions that fail CI. The structure stays clean as the system grows, by construction.
Translate it
Adding a language is adding a dictionary — the routing, direction, and switcher follow automatically. Right-to-left is a first-class path, not an afterthought.
Tested seriously
Unit, integration, concurrency, and end-to-end championship harnesses run in CI with a coverage gate. Changes land with confidence, not crossed fingers.
Jump in
Clone the repo, read AGENTS.md for the architecture, and pick up a good-first issue. Pull requests welcome.