Mushroom-Systems/lichen-v1

Turn local language models into Jev-style structured decision models. Get results from text and images with prefill alone—no token-by-token decoding required.

Jev-compatible API endpoint based on open models (prefill-only)

Super fast Jev like server in JS, model agnostic, working with any OpenAI compatible endpoint

Jev-like decision models that can also see images — open weights on Qwen3.5, run on your own GPU

System One MCP connector to evaluate anything fast and cheap. Give your AI agent direct access to models like: Jev, D1, CLM and Laya

A small open decision model: state + typed questions -> calibrated probabilities. A Jev / System One re-creation on Qwen3.5.

The open, local take on Jev: typed decisions from an LLM, without generating a single token

Opensource Jev

jevos: an open-source alternative to Jev and Microsoft-Decision-1. Yes/no decisions, choices and scores with probabilities, on your laptop's CPU.