BeatJev

A human vs. TypeSafe's Jev in a 25-round spam-or-not reaction race. Each round has a 3-2-1 countdown. When it hits zero, the message appears, your timer starts, and the page asks Jev the same question, all on the same tick. After 25 rounds, a results screen compares speed and accuracy and gives you a share link for X and a result image.

It's a Cloudflare Worker. public/ is served as static assets (plain HTML/CSS/JS, no build step). src/worker.js handles POST /api/classify and calls Jev through @typesafe-ai/sdk, so the API key stays server-side.

Deploy

npm install
npx wrangler login
npx wrangler secret put TYPESAFE_API_KEY   # required before the first deploy
npx wrangler deploy                        # → https://beatjev.<you>.workers.dev

Local

echo 'TYPESAFE_API_KEY=...' > .dev.vars    # optional, gitignored
npx wrangler dev                           # http://localhost:8787

Without a key, the Worker answers from a keyword MOCK with a fake delay, and the page shows a MOCK badge. The mock is not Jev.

API

POST /api/classify with { "text": "..." } returns { isSpam, probability, confidence, latencyMs }.

• The call is a Noul question, "is this spam, a scam, or deceptive marketing". isSpam is probability >= 0.5.
• A Noul answer only carries the probability, so confidence is derived as |probability − 0.5| × 2.
• latencyMs is measured in the Worker around client.systemOne() only. It's Jev's decision time plus the edge-to-TypeSafe hop, and doesn't include the player's own trip to the Worker.
• The Jev call has a 3s timeout and no retries, since a retry would quietly add to Jev's time. On timeout the route returns 504 { error: "timeout" }, the round shows "Jev didn't respond in time", and it counts as wrong for Jev and is left out of Jev's average.
• text must be one of the 25 messages in public/messages.js. The endpoint is public and spends your key, so it won't classify arbitrary input.

Fairness notes

• The message order is shuffled every game.
• Your tap is timed on pointerdown, not click, so the finger lift doesn't count.
• If Jev answers before you, the card shows only its time. The verdict stays hidden until you pick, so you can't copy it.