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System One

lafollett-labs/typesafe-jev-dojo

A live, graphical demo of Jev covering routing, a Tetris-playing agent, parallel swarms and a Jev-versus-Claude gauntlet, built to show its accuracy and speed on real inputs rather than a pre-recorded video.

The Stacker scene — Jev plays Tetris, one typed decision per piece
Image from github.com

lafollett-labs/typesafe-jev-dojo on GitHub

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Language
TypeScript
License
MIT
Last push
21 Sep 2026

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How it uses Jev

const INPUT_USD_PER_TOKEN = 0.042 / 1_000_000;

/** Preset transports. Native uses the authoritative schema our types already match. */
export const JEV_TRANSPORTS = {
  native: { baseUrl: "https://api.typesafe.ai", path: "/v1/systemone", model: "jev-latest" },
  openrouter: { baseUrl: "https://openrouter.ai/api/alpha", path: "/decisions", model: "typesafe/jev-1.13" },
} as const;

View in src/jev/index.ts

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