What it is
Small interactive demos for developers to see how TypeSafe Jev makes decisions: routing a support message and steering a car in a 3D world with visible inputs and judgments.
How it uses Jev
In demo01, Jev makes six independent judgments on a support message: owning team, human request, refund request, urgency, frustration, and reproduction steps. In demo02, Jev chooses lane and target speed for a car based on structured simulated sensor observations. Results are combined by ordinary code into routing previews or driving behavior.
Primitives:choicescore
Technique worth stealing
Make model inputs, judgments, and resulting behavior visible, including hesitation and mistakes.
Try it
Set TYPESAFE_API_KEY in .env, then run docker compose -f demo01/compose.yaml up -d --build and open localhost:3001.
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-centricyes0.91
- Shows a System One patternunclear0.40
- Handles uncertaintyno0.06
- Measuredno0.05
- Runnableno0.31
- Worth recommendingunclear0.44
- Model replicano0.07
- Problem scopescore on a 0–2 scale0.11
- About Jevyes0.98
Signals by Jev jev-1.13.0, card written by DeepSeek V4.1 Flash from the README on 20 Sept 2026.