Beginner5 lessons~105 min

Jev Foundations

From zero to your first production decision

Start here. Build an accurate mental model of what a System One model is, learn the three primitives by composing them in the browser, and ship a working ticket triage endpoint.

What you’ll be able to do

  • ✓Explain what Jev returns and why it never emits a string
  • ✓Write Choice, Score, and Noul questions that survive contact with real input
  • ✓Read probabilities and confidence without over-reading them
  • ✓Ship a triage endpoint with sensible confidence gates

Lessons

  1. 01

    What You're Actually Calling

    free

    One endpoint, three primitives, zero strings out. Build a request payload piece by piece and watch the JSON assemble.

    12m
  2. 02

    The Three Primitives

    free

    Choice is a match statement, Score is a sort key, Noul is an if. Compose all three against one state in the builder.

    18m
  3. 03

    Reading Probabilities and Confidence

    paid

    Confidence is derived from the distribution, not reported separately. Drag the sliders until that clicks.

    16m
  4. 04

    Writing Atomic Questions

    paid

    The single skill that decides whether Jev works for you. Decompose four compound questions and get graded.

    22m
  5. 05

    Project: Ticket Triage

    paid

    Build the whole thing — fan out five questions, gate on confidence, route to four handlers.

    35m