Top 100 Jev Showcase & Jev Prompts — States, Decisions & Patterns for TypeSafe's Jev

What is this

Top 100 Jev Showcase & Jev Prompts is the organized, interactive record of what happened when TypeSafe AI's Jev — the first "System One Model" (launched 2026-09-15, $40M seed led by DCVC) — met the builder community. Jev doesn't generate text: it takes a state and returns typed decisions with calibrated probabilities (Choice, Score, Noul). Within 72 hours GitHub counted 568+ repos touching it. This app is the complete atlas of that explosion, and the pattern library that makes Jev decisions good.

What's inside

• 🏆 Top 100 Jev Showcase — 135 community projects tracked, top 100 ranked by stars, each card with its own live preview: browser-use/jev-ultrafast (2,200+★), the openjev replica (800+★), a trading bot deciding every Monad block, a camera-only drone, a Home Assistant integration, and fhshaik/typesafe-mario — pushed 90 seconds after the tweet that made it famous (2,278 likes).
• 🧠 Jev prompts: the grammar — the three primitives (Choice / Score / Noul) and three state formats, verbatim from the official docs, plus the full typesafe-mario state schema.
• 📚 The pattern library — 42 entries: speculative fan-out, confidence-gated routing, composite scoring, intent routing, all 16 official cookbooks, and the community patterns from the first 72 hours.
• 📺 Watch & explore — the Mario gameplay still, three official videos, and every TypeSafe-run property (docs, console, evals, Discord).

Sources & honesty

Data merges GitHub search (729 matches at snapshot) with a first-hand scrape of TypeSafe's own Discord #show-and-tell channel (714 links, full history since July 22). Every claim is sourced in the companion repo awesome-jev-prompt — 39 registered sources with verification status. Unofficial; not affiliated with TypeSafe AI. Snapshot 2026-09-18.