What it is
A TypeScript web app where TypeSafe's Jev, a System One decision model, auto-plays Snake in real time. Built for developers exploring typed, non-LLM decisions in a game loop.
How it uses Jev
Code computes legal moves and facts per move (food distance, flood-fill reachable cells, dead ends). Jev answers one `choice` question per tick; the controller asks at tick start and plays whatever arrived by tick end, defaulting to straight if late.
Primitives:choice
Technique worth stealing
Fixed-clock loop: ask the model at tick start, play the answer at tick end, fall back to a code-generated move on timeout.
Try it
cp .env.example .env, set TYPESAFE_API_KEY, then pnpm install and pnpm dev.
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-centricyes0.96
- Shows a System One patternyes0.94
- Handles uncertaintyyes0.72
- Measuredno0.05
- Runnableyes0.94
- Worth recommendingunclear0.51
- Model replicano0.05
- Problem scopescore on a 0–2 scale0.00
- About Jevyes0.98
Signals by Jev jev-1.13.0, card written by DeepSeek V4.1 Flash from the README on 20 Sept 2026.