Leon

Leon is an open‑source personal AI assistant designed to run on a user’s own server. Built with Node.js and Python, it can be installed locally and accessed through a web interface at http://localhost:1337. The system supports multiple operating modes—smart, workflow, and agent—that let it interpret goals, select appropriate actions, and execute tasks using real tools rather than only generating text.

The assistant integrates context about the host environment, maintains layered memory for preferences and recent interactions, and can connect to both local and remote AI providers, giving users control over privacy and data handling. Its modular architecture organizes functionality into skills, actions, tools, and functions, allowing developers to add or replace components such as text‑to‑speech, speech‑to‑text, and domain‑specific utilities.

Leon is released under the MIT license, requires Node.js ≥ 24, and is intended for anyone who wants a self‑hosted, extensible assistant that can automate personal workflows while keeping data on‑premises.