What it is
An MCP server for TypeSafe Jev, written in Rust. It gives agents one tool, evaluate, that takes a state plus typed questions and returns noul, choice, or score answers with probabilities. Not affiliated with TypeSafe.
How it uses Jev
The evaluate tool sends a state string and typed questions (noul, choice, score) to Jev. Jev returns answers with probabilities, such as noul 0.95 or a choice with confidence and per-option probabilities. The README does not describe how the result is used in code.
Primitives:noulchoicescore
Technique worth stealing
Pin a versioned model like jev-1.13.0 after tuning a threshold.
Try it
Install via the install script, npx typesafe-jev-mcp, or cargo install typesafe-jev-mcp.
Evidence
Each line is one question put to Jev about the README. ≥ 0.60 reads as yes, ≤ 0.40 as no; in between Jev is not making a call.
- Jev-centricyes0.95
- Shows a System One patternno0.17
- Handles uncertaintyno0.04
- Measuredno0.04
- Runnableyes0.98
- Worth recommendingno0.20
- Model replicano0.07
- Problem scopescore on a 0–2 scale1.01
- About Jevyes0.98
Signals by Jev jev-1.13.0, card written by DeepSeek V4.1 Flash from the README on 20 Sept 2026.