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TypeSafe Experiments

Interactive browser experiments that expose Jev's judgments: a support-message Decision Lab and a driving simulation where structured sensor state becomes typed steer, brake, and overtake decisions.
Stars
15
Language
JavaScript
Reading time
3 min
Published by
Community
Author
kavehmz
Last verified
Sep 2026

Interactive experiments with TypeSafe Jev, from support routing to 3D driving simulations with real AI decisions and visible sensor inputs.

Forks
4
Last pushed
Updated Sep 2026

Repo stats from the GitHub API, cached Oct 2026.

About this project

Small, interactive experiments with TypeSafe Jev: from understanding a support message to making decisions for a car in a 3D world. The aim is to make the inputs, model judgments and resulting behaviour visible—including hesitation and mistakes. These are experiments with real API calls, not polished benchmarks. The Fable implementation: four camera feeds, radar and blind-spot readings, remembered speed signs, and Jev's decision panel. Captured before starting a run; the decision values have not yet been populated.

Quoted from the project's README. Read the full README.

Highlights

  • Three demos run side by side on ports 3001, 3002, and 3003: Decision Lab, Jev Driving Lab, and a Fable implementation.
  • In demo01 a support message becomes six independent judgments that ordinary code combines into an inspectable routing preview.
  • Driving demos give Jev structured simulated sensor observations, not camera images, and runs last 90, 120, or 180 seconds.
  • Needs Docker Compose or a compatible Podman setup and a TypeSafe API key; evaluations and driving runs make billable requests.
  • Routing is a preview: no real ticket is sent and no refund is issued, and camera views are rendered for the audience.

Quickstart

bash
cp -n .env.example .env
# edit .env and set TYPESAFE_API_KEY to YOUR_API_KEY
docker compose -f demo01/compose.yaml up -d --build
docker compose -f demo02/compose.yaml up -d --build

Watch out

No license file, so reuse terms are unclear; requires Docker with Compose or a compatible Podman setup and a TypeSafe API key, and live evaluations or auto-restarting driving runs make billable requests.

Questions about this entry

Short answers drawn from the linked project or page.

Reactions & coverage

Posts, threads, and videos about this entry from around the web.

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Hacker News: Show HN: a mouse colony where each next move is Jev or a fixed rule.

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From the Jev guides

Original write-ups on what this entry is for.

From the Jev AI model community

Posts from builders shipping with Jev right now.

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