Documentation

NotJev : Kev is an open-source System One decision engine. You send context and typed questions; you get back choice, score, or noul with calibrated probabilities — not a paragraph to parse.

This site is docs and showcase only. Source, issues, and releases live on GitHub.

Primitives

Primitive	Returns	Use for
choice	Winning key + full distribution	Routing, intent, triage
score	Ordinal level + distribution	Urgency, quality, sentiment
noul	Probability in [0, 1]	Escalate? Toxic? Block?

In this docs set

Quick start — install and run locally
API — request / response shape
SDKs — TypeScript & Python with code examples
CLI — demo, ask, stability eval
MCP — Cursor / agent tools
Adapters — LangChain & LlamaIndex
Backends — mock, Ollama, OpenAI-compatible
Benchmarks — held-out accuracy vs chance and published Jev numbers
Why NotJev : Kev — open vs hosted System One

Minimal request

curl -s http://127.0.0.1:3000/v1/systemone \
  -H 'Content-Type: application/json' \
  -d '{
    "state": "Charged twice. I am furious.",
    "questions": {
      "topic": {
        "type": "choice",
        "instructions": "Which team?",
        "criteria": {
          "billing": "charges and refunds",
          "technical": "bugs and outages"
        }
      }
    }
  }'