TypeSafe AI playground

# TypeSafe AI Playground

A community playground for **TypeSafe AI's Jev**: edit classification experiments, compare A/B inputs, route conversations, extract document fields, inspect code-policy decisions, and explore games and simulations built around typed model outputs.

**Small experiments. Clear decisions.** This is an independent community project, not an official TypeSafe AI product, production agent harness, or claim that a typed answer is correct.

**Shout-out to [@nickthompson480](https://github.com/nickthompson480) for the [original TypeSafe AI playground (examples only)](https://github.com/nickthompson480/typesafe-ai-playground).** This community extension builds on that project's example library and Python foundation with a Next.js interface and interactive prototypes. The original credit and [MIT license](LICENSE) are retained.

[Open the live playground](https://typesafe-ai-playground.vercel.app) · [TypeSafe API documentation](https://docs.typesafe.ai/introduction/quickstart) · [Contributing](CONTRIBUTING.md) · [Agent guide](AGENTS.md)



## Run locally

Use **Node.js 22.3+** and the exact pnpm version pinned in [package.json](package.json), currently `10.34.5`. Use pnpm only: the repository's local guard rejects other package managers, and `pnpm-lock.yaml` is the single JavaScript dependency lockfile.

```sh
git clone https://github.com/TypeSafeAI/typesafe-playground.git
cd typesafe-playground
# Install/activate the pnpm version declared in package.json.
# Where Corepack is installed, `corepack enable` enables its shims.
pnpm install --frozen-lockfile
cp .env.example .env.local
# For live evaluations, edit .env.local and set TYPESAFE_API_KEY.
pnpm dev
```

Open the dedicated development address, `http://localhost:3042`. `pnpm dev` keeps this port by defa