# Playgrounds and demos

20 entries.

- [typesafe-playground by TypeSafeAI](https://github.com/TypeSafeAI/typesafe-playground) - 110 use cases, games, and model challenges with editable prompts and A/B comparisons; a community org, not the vendor, formerly under BunsDev.
- [typesafe-playground by kavehmz](https://github.com/kavehmz/typesafe-playground) - From support routing to a 3D driving simulation with visible sensor inputs.
- [jev-experiments](https://github.com/dabit3/jev-experiments) - Nader Dabit's grab bag of small Jev experiments.
- [TypeSafe Typewriter](https://typesafe-demo.val.run/) - Sixteen typed judgments update as you type, on Val Town.
- [Yes / No](https://yesno.coderai.dev) - Ask a question, get yes, no, or maybe, with web search when needed; no signup.
- [Jev Pac-Man](https://jev-pacman.ephraimduncan.com) - The maze as JSON; Jev picks the turn at every junction.
- [Jev Tetris](https://jev-omega.vercel.app) - Rotation and column chosen from holes, stack height, and bumpiness.
- [Hollow Creek](https://hollow-creek-sigma.vercel.app) - Village NPCs that judge you each tick instead of chatting.
- [Crowdcheck](https://crowdcheck-ai.vercel.app/) - Test a post against 10,000 synthetic personas before you publish it.
- [Magic-8-Jev](https://github.com/willprout/magic-8-ball) - Ask a question, one choice over twenty answers picks the reply and shows the click-to-answer latency; [live demo](https://willprout.github.io/magic-8-ball/).
- [typesafe-ai-playground by markjaquith](https://github.com/markjaquith/typesafe-ai-playground) - Rust CLI playground for experiments around Jev.
- [jev-playground by wustep](https://github.com/wustep/jev-playground) - Can a System One model steer a music composition through typed classify, score, and pick decisions alone.
- [typesafe-jev-workflow](https://github.com/GiesN/typesafe-jev-workflow) - LangGraph demo that sends a mocked email to Jev and routes on the typed Choice it returns.
- [jev-little-airways](https://github.com/lbotinelly/jev-little-airways) - Show-and-tell capability study for Jev.
- [jev-demos](https://github.com/bud-ro/jev-demos) - Demos built to test what Jev is good at.
- [Jev Classifier](https://jevclassifier.vercel.app) - Hosted demo filing posts by type, quality, sentiment, and tone.
- [Jev Guard demo](https://guard-jev.vercel.app) - Hosted comment-moderation playground.
- [Companion](https://jev-demo.vercel.app) - Hosted robot interface answering nine typed questions per turn to decide act, ask, or shrug, no generated text.
- [Jev System One](https://github.com/haseeb-heaven/jev-system-one) - Terminal interface where OpenAI answers and Jev separately scores relevance, reliability, and quality.
- [jev-web-analyzer](https://github.com/replynodes/jev-web-analyzer) - Turns a SaaS landing page into Markdown and asks Jev ten bounded Choice questions about what a first-time visitor understands, shown as a founder teardown.

Page: https://awesomejev.vercel.app/c/playgrounds-and-demos/