A FIELD GUIDE TO JEV / VOL. 01
The best of Jev. Real projects, practical guides and ideas from across the internet.
THE OFFICIAL SIGNAL 4 HIGHLIGHTS
Diogo Almeida@CompleteSkepticLAUNCH POSTDiogo Almeida introduces Jev, TypeSafe’s structured decision model. Watch the launch film and explore the original thread for the model’s approach, examples and author-reported performance.
TypeSafe AI@typesafeaiOFFICIALTypeSafe’s official launch announcement introduces the lab and points builders to Jev. It includes Diogo Almeida’s launch film and original introduction.
TypeSafe AI@typesafeaiOFFICIALTypeSafe announces public access to Jev without a waiting list. The official console is the starting point for trying typed decisions in your own application.
JEVLAB ARTTypeSafe AI@typesafeaiOFFICIALTypeSafe highlights Jev’s typed-output approach: applications provide state and questions, then act on probabilities, choices or scores. The linked announcement also covers the Venice API integration.
JEVLAB ARTStart with the Launch Post. Explore four official signals.
1,198 resources
AI-assisted summaries and translations. Check original sources for context and performance claims.
Small game that tests how Jev handles unknown input.
JEVLAB ART
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Context-pruning proxy for Claude Code and Codex: Jev judges which history is still needed, measured not claimed. POC here now, heading soon into https://github.com/compozy/compozy.
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A developer project for the hardware shelf involving two-stage Jev control of a robotic arm in MuJoCo.
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Jev (TypeSafe) vs Claude Haiku 4.5 on 2 000 phishing emails: accuracy, calibration, latency, cost. Reproducible benchmark.
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MovezAnalyzes 100,000 X posts in 20.4 seconds using 14 yes/no questions per post for viral potential assessment.
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TamirJevForm creates adaptive forms that change based on user input meaning rather than fixed if-then logic.
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A developer project focused on agent memory, where Jev determines what information is relevant to recall.
JEVLAB ARTEnglishSource-linked curation
A collection of research papers and open reproductions supporting System One models.
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Jev rapidly analyzed news articles to suggest relevant stories for brands at a low cost.
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Justine MooreJev enables natural language search for Zillow listings, classifying properties by non-standard filters.
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Jev integrates with Netlify's AI Gateway for zero-configuration use.
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A report detailing all public Jev builds in the first week, including cost, time, and repository metadata for research use.
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Jev is utilized for decision-making processes on Cloudflare, including support routing and risk management.
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看看 Jev 能做什么：用中英文讲清热门应用、工作原理和各自优缺点。Explore Jev apps with plain-language examples, explanations, and comparisons.
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Daniel ChJev converts websites into native mobile apps by deciding the optimal build process and handling app store submissions.
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Codex plugin: verbatim Jev-guided context restoration around session compaction. Port of tamaratran/fast-jev-compaction to Codex lifecycle hooks.
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Albiona HotiJev generates 100 images from sources like NASA and The Met based on a single prompt.
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CJ (Coding Garden)A chat bot using Jev without a large language model, providing instant responses by integrating web search, Wikipedia, weather, and other tools.
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Independent Jev 1.13.0 behavior study: report, controlled prompt experiments, raw results, and offline verification.
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x.comJev enables flexible, type-safe classification as a fundamental programming primitive.
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Open-source Jev-style System One decision model. Gemma 3 270M with a scoring head — fast, calibrated decisions in a single forward pass. No text generation. Inspired by TypeSafe.ai's Jev.
JEVLAB ARTEnglishSource-linked curation
A small open decision model: state + typed questions -> calibrated probabilities. A Jev / System One re-creation on Qwen3.5.
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A project where Jev attempts to defeat the Pokémon League in Pokémon Gold, using basic controls to navigate and win.
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Per-prompt capability router for coding agents: resolves installed skills, MCP servers, agents and commands against your prompt via TypeSafe Jev, and measures whether the injection actually helps.
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Hemant Kumar on his 151M ModernBERT reproduction: 0.83% adaptive calibration error, 3.0% of predictions flip when the option list is reversed, 35.6ms on CPU, with the failed use cases reported alongside the wins.
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Multi-drone autonomy lab demonstrating TypeSafe Jev reflex decisions with optional System 2 strategy guidance.
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Describe your startup idea. Jev decides: kill it, fix it or ship it.
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A predictive app launcher using Jev to interpret user intent and enhance app discovery.
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A 3D planetary rover sandbox for experimenting with autonomous decisions using TypeSafe AI.
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Adapt local language models into Jev-compatible structured decision engines with Choice, Score, and Noul outputs powered by prefill-only binary inference.
JEVLAB ARTEnglishSource-linked curation
在 X 的时间线上，给每条帖子标出它想让你干什么。判断来自 Jev，一个只返回概率、不生成文本的模型。
JEVLAB ARTEnglishSource-linked curation
Jev demonstrates potential for innovative UX/UI design through language model integration.
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A community post about humor management on a social platform.
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ACME live support-call scoring demo with TypeSafe AI, Effect, SQLite, React, Vite, and Turborepo.
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Use Jev (TypeSafe's System One model) as a calibrated reranker: one call, up to 30 documents, a probability per document. Apache-2.0.
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x.comLists six specific tasks where Jev is used for fact-checking, ranking, text finding, citation checking, note grouping, and agent failure analysis.
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An evaluation of typesafe AI chess. As it turns out, the AI isn't doing really well even though chess is not a particularly open-ended game. Still, it's only a prototype and this probably wasn't optimzied for games.
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Jon KraayenbrinkA tool that uses Jev to detect AI-generated content on websites by analyzing specific indicators.
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Leonardo Bissoli apresenta decisões estruturadas com Jev, incluindo confiança, limites e exemplos de uso em aplicações.
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Hugging Face Space exploring open-source parallel constrained decoding as an alternative to Jev.
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Guardrail + model router for LLM gateways on TypeSafe's Jev (System One model), with an independent accuracy/calibration/latency evaluation. Stdlib Python.
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JevArena — two Jev agents duel in click-only browser games (Browser Use + TypeSafe Jev).
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Curated list of official resources and community projects for TypeSafe, System One models, and Jev, with a GitHub Pages site.
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Third-party write-up of the System One primitives, pricing, and vendor workflow evals.
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Screens an AI agent's tool calls before they run and tool results before the agent reads them. An MCP proxy plus a hooks adapter for a client's built-in tools.
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PulseLane — clinic triage decisions via TypeSafe Jev.
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Directory of Jev-based projects including repositories, SDKs, and benchmarks.
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Page-level demo where Jev picks which candidate link to click toward a goal.
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Daf-jev: composable Python toolkit for TypeSafe's Jev (System One) decision API — question builders, confidence gates, evaluator, calibration, CLI, MCP server, agent skill.
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x.comJev functions as an AI-native decision-making system, defining possible outcomes and selecting from them.
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OFFICIALTypeSafe AIOfficial TypeSafe reference: TypeSafe Python SDK.
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Jarrod WattsA trading bot using Jev to decide buy/sell actions based on asset price feeds and executing real trades.
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Agent tool/MCP call gate — allow / ask_human / deny via TypeSafe Jev.
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OFFICIALTypeSafe AIOfficial TypeSafe reference: Composite scoring.
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jev-use (voice). A developer project implementing voice control for macOS with Jev as a fallback option.
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Directory listing systems using Jev for Noul, Score, and Choice questions.
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Jev-style parallel constrained decisions for any MLX model on Apple Silicon. Typed, schema-valid JSON in one forward pass.
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A community project embedding three Jev-powered bots into a first-person shooter game.
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Send Pi agents back to work when they stop before the job is done.
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kitze 🛠️ tinkerer.clubA smart calculator notebook capable of performing various calculations using Jev's processing power.
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A test project based on Jev AI, the goal is to build a search function for a blog/article website that has 100s of articles to search from, So the user can actually use the search as chat to question anything and find related answers/articles.
JEVLAB ARTEnglishSource-linked curation
Ian NuttallUsing Jev on Cloudflare Workers to improve search and content tagging efficiency on keep.md.
JEVLAB ARTEnglishSource-linked curation
Utilizing Jev, the RLCD-type model provided by TypeSafe AI, to independently and cheaply judge agentic coding sessions.
JEVLAB ARTEnglishSource-linked curation
A method for creating pixel art through iterative sketching and refinement using Jev and DeepSeek.
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jev-router (skill). A developer project using Jev to select appropriate models for prompts in coding tasks.
JEVLAB ARTEnglishSource-linked curation
A community post confirming Jev's capability to generate text, responding to a claim that it cannot.
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A community post describing a game where Jev routes trains to stations in real time without a solver.
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Jev improves security pipeline efficiency, offering 5x cost reduction and faster processing while maintaining higher accuracy than smaller models.
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On-device iPhone visual decision tool using MLX and Qwen3-VL direct option logits.
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Discriminative Monte Carlo Tree Search using TypeSafe Jev System One Primitives and Gemini.
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Minimal grammY Telegram anti-spam bot powered by TypeSafe Jev.
JEVLAB ARTEnglishSource-linked curation
Ira BodnarReduces SEO and GEO fix costs by 90% through faster data analysis and automation.
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4 HIGHLIGHTS
Games & real time
Source-linked curation
Agents & browsers
Devices & robotics
Research & data
Decisions & routing
Tools & apps
Markets & experiments
Creative & growth
