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The full directory

All Jev AI model resources

Entries for TypeSafe AI's flagship System One model — official docs and SDKs alongside community clients, tools, and write-ups.

Entries
3,919
Categories
11
Official
102
Community
3,817
Source sites
293
Deep dives
3,919

By format

3919
  • Docs169
  • Repos & sites3102
  • Videos74
  • Posts104
  • Articles392
  • Playgrounds78

Updated

Browse the Jev AI model by category

11 ways into the ecosystem. Each category page leads with its own shortlist of starting points.

Browse the Jev AI model by use case or industry

The same directory, sliced by what you are building and who you are building it for.

Jev use cases13 ways to put Jev to work, from classification and routing to decision gating and evaluation.
Jev industries14 sectors building with Jev, from software and security to healthcare and robotics.

All 3919 Jev AI model resources

Search the full directory, or filter by category and tag.

Showing 1105–1152 of 3919 resources

any2jev
7GitHub stars
Turns any Hugging Face causal LM plus a few thousand labelled decisions into a Jev-style model that answers Choice, Score and Noul questions in one forward pass, with calibrated probabilities and zero generated tokens.
Jev Repos & SDKs#community#catalog-import#madewithjev
Communityhwfengcs/any2jevPython
Jev in Blender — operator search
7GitHub stars
A Blender 4.2+ extension that adds a Jev tab to the 3D Viewport sidebar: describe what you want in plain language, press Enter, and Jev ranks every registered bpy.ops operator. Click a result to run it, or copy its bpy.ops call.
Jev Tools & CLIs#community#catalog-import#logicrw
Communitykolibril13/jev-in-blender-experimentPython
jev-search-mcp
7GitHub stars
Jev-backed web search for Claude Code and Codex in three forms: a function-hook plugin that answers the built-in WebSearch with Jev, an MCP server, and a CLI. Jev picks sources and time window, then ranks results by relevance; zero runtime dependencies.
Jev Agents & MCP#community#catalog-import#madewithjev
Communitymukiwu/jev-search-mcpJavaScript
jev-tools
8GitHub stars
Six evidence-oriented tools for the pi and omp coding agents, also usable from any MCP client: navigate unfamiliar code, ask typed questions about repository evidence, review completed changes, and select existing tests.
Jev Agents & MCP#community#catalog-import#logicrw
Communitynomenak/jev-toolsTypeScript
Jev Papers
7GitHub stars
Classifies 1,000 recent arXiv AI papers into 24 topics with one Jev decision each, then checks those labels against an LLM judge on a seeded sample of 100. Ships three scripts and a static topic-map page.
Jev Benchmarks & Evaluations#community#catalog-import#logicrw
Communitystas4000/jev-papersPython
jev-windows-agent
8GitHub stars
A Windows UI Automation extension of arc-cua: a planner hands off a bounded subtask and a fast JEV-powered decision loop observes the desktop, picks legal actions and drives real Windows apps locally.
Jev Repos & SDKs#community#catalog-import#logicrw
Communityvbs2004/jev-windows-agentPython
JevRAG
6GitHub stars
A pluggable decision substrate for RAG pipelines: explicit state → Decision → confidence → action gates with Jev as the first swappable backend, plus a calibration-first evaluation harness for five decision primitives.
Jev Repos & SDKs#community#catalog-import#logicrw
Communityajanm007/jevragPython
Jev Harness
6GitHub stars
A minimal coding agent that filters every tool result through Jev before the main model reads it, plus the A/B harness that measured pass@1 and cost. The final TB4 follow-up closed the experiment without an end-to-end win.
Jev Benchmarks & Evaluations#community#catalog-import#madewithjev
Communityastro-han/jev-harnessPython
Jev Decision Service
6GitHub stars
A lightweight Jev/System One compatible HTTP gateway that turns an existing SGLang or vLLM deployment into a decision service by scoring candidate tokens: no training, no weight changes, noul/choice/score in and probabilities out.
Jev Integrations & Adapters#community#catalog-import#madewithjev
Communitydavid-lolly/jev-compatiblePython
Laya Fast
6GitHub stars
An independent Apple Silicon runtime for Convai Innovations' Laya, a 421M ModernBERT-large typed-decision model: MLX GPU inference with optional Core ML Neural Engine bodies and a measured ANE/GPU batch router.
Jev Repos & SDKs#community#catalog-import#madewithjev
Communitydjlougen/laya-fastPython
JevRanker
6GitHub stars
Plugs Jev-style decision models into published rerankers as a fast primitive: one forward pass over k candidates, zero decoded tokens. On T2Ranking it reports up to 22x faster matches than a generative listwise reranker at 2.9x the nDCG@10.
Jev Repos & SDKs#community#catalog-import#yibie
Communityhgqimo/jevrankerPython
Jev vs. the right baselines
6GitHub stars
A pre-registered independent evaluation of Jev on intent classification and confidence-gated cascades against nano-class and frontier LLMs and a supervised encoder, plus a second study of confidence under prompt injection.
Jev Benchmarks & Evaluations#community#catalog-import#logicrw
Communityickma2311/jev-baselines-evalPython
Jev Desktop
6GitHub stars
Lets AI agents use Windows applications through MCP or the command line: hand off a bounded task and Jev observes windows, chooses controls, types supplied text and navigates locally, returning a result or a request for help.
Jev Agents & MCP#community#catalog-import#logicrw
Communityjacks3tr/jev-desktopPython
jev-agent-tools
6GitHub stars
A multi-provider Jev transport layer with fail-closed validation, used by jkudish/jev-browser and jkudish/jev-mcp. One ask() call picks a carrier, sends typed questions and validates answers instead of throwing a verdict.
Jev Repos & SDKs#community#catalog-import#logicrw
Communityjkudish/jev-agent-toolsJavaScript
Context Diet
6GitHub stars
A Codex plugin that asks Jev which bulky tool results a long session still needs, then replaces the rest with a bounded head and a one-line note at the moment the output is produced.
Jev Agents & MCP#community#catalog-import#madewithjev
Communitykonstantinosbotonakis/codex-context-dietTypeScript
jev-piano
6GitHub stars
An experimental web app where Jev — handed typed chord questions, not text — improvises piano: describe a mood like a slow, sad waltz and it decides harmony, metre and tempo bar by bar. Live at jev-piano.zammitpaul.com.
Jev Demos & Experiments#community#catalog-import#madewithjev
Communitylamplighterpaul/jev-pianoTypeScript
OpenJev
6GitHub stars
Open reimplementation of the Jev decision-model idea: masked-logit softmax turns any small local LLM or OpenAI-compatible API into a type-safe decision engine with raw probabilities. Also ships a WeChat/QQ/Telegram crush radar with a verdict and next-move advice.
Jev Repos & SDKs#community#catalog-import#logicrw
Communitylookski/openjevPython
Jev-GamePilot
6GitHub stars
Autonomous gaming agent pairing Laya's local sub-30 ms System One inference with TypeSafe Jev Choice, Score and Noul decisions. Plays Windows PC games with hardware scan codes and Android games through ADB touch injection.
Jev Agents & MCP#community#catalog-import#logicrw
Communitynewuser7171/jev-gamepilotPython
Jev in Codex
6GitHub stars
Codex plugin and MCP tool that batch-labels JSONL text records with Jev: one jev_label tool assigns a label per record and hands low-confidence decisions back to Codex for review. Its benchmark reports less Codex input and elapsed time on synthetic workloads.
Jev Agents & MCP#community#catalog-import#logicrw
Communityteempai/jev-in-codexTypeScript
JEV Tetris
6GitHub stars
A playable Tetris where Jev never sees the board: code enumerates every legal placement as a sentence and Jev returns a probability for each in about 380 ms. The field glows with the whole distribution before the piece drops.
Jev Demos & Experiments#community#catalog-import#cobanov
Communitythelau/jev-tetrisJavaScript
Jev Music Tag
6GitHub stars
Minimal Jev metadata workbench for local music files: a FastAPI backend sends track metadata and scoring questions to TypeSafe Jev and can write the chosen genre or language back with Mutagen, behind a small React page for editing prompts and questions.
Jev Tools & CLIs#community#catalog-import#logicrw
Communityxhongc/jev-music-tagPython
Leanest
5GitHub stars
Local-first test selector that asks a judge — classifier.dev by default, or Jev with a TypeSafe key — whether each test could be affected by the current code change, then hands only the selected files to Playwright or Vitest. Uncertainty always runs the full suite.
Jev Tools & CLIs#community#catalog-import#logicrw
Communitybaronunread/leanestTypeScript
goodall
5GitHub stars
Small Go library for tool-using AI programs: the agentic loop runs until the model finishes or a budget stops it, with Anthropic and OpenRouter providers, tool schemas inferred from Go types, and an optional chat package for threads, SSE and NDJSON.
Jev Repos & SDKs#community#catalog-import#logicrw
Communitybensyverson/goodallGo
JevRL
5GitHub stars
A runnable reward-model laboratory that trains DQN agents on CartPole, MountainCar, Acrobot and FrozenLake with official JEV scores as rewards: 36 runs across 3 seeds and 3.24 million steps, with checkpoint replays and a recorded JEV cost of about $0.00241.
Jev Benchmarks & Evaluations#community#catalog-import#logicrw
Communitybring-ai/jev-rlPython
jev-wechat-live
5GitHub stars
An abandoned WeChat overlay experiment published with its post-mortem: it reads WeChat's local encrypted database and asks Jev to show emotion, subtext, intent and a suggested reply. The pipeline works, but the README says judgment accuracy fell short.
Jev Tools & CLIs#community#catalog-import#madewithjev
Communityduckegg0623-create/jev-wechat-livePython
toXic Filter
5GitHub stars
Chrome extension that classifies X posts with Jev and blurs chosen expression categories — discrimination, provocation, hatred, calls to attack, cynicism, resignation — behind a translucent overlay you can reveal with one click.
Jev Tools & CLIs#community#catalog-import#madewithjev
Communityeijiaraki/toxic-filterJavaScript
jev-php
5GitHub stars
A small PHP 8.1 library, extracted from LLPhant, giving typed value objects for Jev's Noul, Choice and Score answers, with probabilities and token usage. Unofficial and community-built; you supply a TypeSafe API key, or point it at Laya.
Jev Repos & SDKs#community#catalog-import#logicrw
Communityf-lombardo/jev-phpPHP
Jev vs Laya benchmark
5GitHub stars
Benchmark comparing TypeSafe Jev 1.13 with the local Laya MLX typed-decision model across 1,470 synthetic items and eight tasks: accuracy, calibration, latency and throughput, with scripts, datasets, predictions and the full report in the repo.
Jev Benchmarks & Evaluations#community#catalog-import#logicrw
Communityharrymunro/jev-laya-benchmarkPython
电商客服意图路由沙盘 (E-commerce CS Routing Sandbox)
5GitHub stars
E-commerce customer-service quality sandbox: Jev judges intent, emotion, urgency and risk per message, an 8-rule decision table routes to queues with SLAs, and dangerous agent phrasing is blocked with rewrite suggestions before it is sent.
Jev Demos & Experiments#community#catalog-import#logicrw
Communitykiler398/jev-demoTypeScript
jev-mcp (browser automation)
5GitHub stars
MCP server that lets Claude Code, Codex and other agents drive a real Chrome browser while JEV makes the small typed decisions — which element, which suggestion, did the click work — with calibrated confidence driving act, verify or ask.
Jev Agents & MCP#community#catalog-import#logicrw
Communitylegostin/jev-mcpTypeScript
headroom
5GitHub stars
A local-first Codex plugin and skill that gives AI conversations a daily brain budget, scored locally by Laya rather than Jev. Windows tray card, optional macOS menu bar or web dashboard, mood memes, and English and Chinese interfaces; Python 3.10+.
Jev Tools & CLIs#community#catalog-import#madewithjev
Communityllm-learner/headroomPython
Your Signal
5GitHub stars
An open-source BYOK Chrome extension that applies personal, reversible filters to the X timeline: you choose interests, weights and thresholds, Jev scores eligible post text remotely, and every display decision stays on your device.
Jev Tools & CLIs#community#catalog-import#logicrw
Communitymithrilman/your-signalJavaScript
jev-browser
5GitHub stars
A browser automation CLI for AI agents: drive Chrome with natural language in an interactive terminal or structured commands like jevb page act, signed in with a TypeSafe or OpenRouter key. Prebuilt packages target macOS Apple Silicon; Node.js 22+.
Jev Tools & CLIs#community#catalog-import#logicrw
Communitymrlyk/jev-browserRust
Laya Go
5GitHub stars
The Go server, agent CLI and MCP for Laya - open horizontal System 1 decision models that score structured features and return ranked pattern probabilities instead of text. It ships a JEV compatibility API and a migration guide.
Jev Repos & SDKs#community#catalog-import#madewithjev
Communityneko233-com/laya-goGo
jev-tool-permissions
5GitHub stars
A tool-permissions layer for the Vercel AI SDK backed by Jev through the Vercel AI Gateway: a pre-flight approval gate that decides auto-approve, ask-human or block, plus tool-list pruning that drops irrelevant definitions to save context tokens.
Jev Integrations & Adapters#community#catalog-import#logicrw
Communitynicolasmontone/jev-tool-permissionsTypeScript
Questions
5GitHub stars
Typed semantic decisions for TypeScript: ask Zod 4 or native question batches about your data and get validated answers through async/await or Web Streams, with confidence gates, retries, replay and observability. Jev runs via TypeSafe AI or Vercel evaluation.
Jev Repos & SDKs#community#catalog-import#logicrw
Communitynitoba/questionsTypeScript
Jev plays Vampire Survivors
5GitHub stars
TypeSafe's Jev plays the real Steam game Vampire Survivors - it picks the character, stage, every level-up and the walking direction four times a second, with a live decision dashboard. A BepInEx plugin and Python brain; native Linux only.
Jev Demos & Experiments#community#catalog-import#logicrw
Communityoldmoldycake/jev_vampire_survivorsPython
Jev Code Finder
5GitHub stars
A Rust CLI that searches code by meaning with Jev: describe a concept in plain English and get relevant files, line ranges, confidence scores and source snippets, with tunable file and match thresholds plus retry handling.
Jev Tools & CLIs#community#catalog-import#logicrw
Communitypeu77/jevfindRust
jevopt
5GitHub stars
A C/C++ compiler driver that combines Clang's optimiser with Jev for function-call inlining at every discretionary call site. The project reports 58.2% code-size reduction on Statemate from the Embench benchmark; Linux with pinned LLVM 21.
Jev Tools & CLIs#community#catalog-import#logicrw
Communityramneet-singh/jevoptPython
Pi Jev Guard
5GitHub stars
A Pi extension that checks proposed code edits against your repository's Markdown rules with TypeSafe Jev and returns the exact instruction text and source line range for each violation. Informative mode reports; enforcement mode blocks reviewed code.
Jev Integrations & Adapters#community#catalog-import#logicrw
Communityreindeer-ai/pi-jev-guardTypeScript
jev-agent-toolkit
5GitHub stars
A portable Agent Skill that teaches coding agents - Claude Code, OpenAI Codex, Cursor and other compatible hosts - to use Jev as a bounded judgment layer, plus an optional MCP bridge and workflows for code, browser research, Blender and Unreal.
Jev Agents & MCP#community#catalog-import#logicrw
Communityreiswaffel78/jev-agent-toolkitJavaScript
jevr
5GitHub stars
A native R client for Jev and TypeSafe System One: send a state plus typed questions and get structured answers back in R. Supports jev_choice, jev_score and jev_noul questions, several questions per evaluation, and jev_map over many states.
Jev Repos & SDKs#community#catalog-import#cobanov
Communitysimxnherrera/jevrR
jevlang
5GitHub stars
Python with a smart if: .jev files add the ~ question operator and jev/case blocks that Jev answers with a number or a label, never text. Files are rewritten to plain Python at import time; every ~ is one paid TypeSafe API call.
Jev Repos & SDKs#community#catalog-import#logicrw
Communitysumanmichael/jevlangPython
codex-jev-router
5GitHub stars
Route OpenAI Codex CLI turns through Jev: a local loopback Responses API proxy asks Jev to pick a Codex model and reasoning effort for each fresh turn, then forwards the request. If Jev is unavailable, Codex continues unchanged.
Jev Integrations & Adapters#community#catalog-import#madewithjev
Communitytiandee/codex-jev-routerJavaScript
Work with Jev
4GitHub stars
A local-first classifier for Feishu and WeCom work messages: Jev judges whether each message matters to you and the app sorts them into urgent, to-do, worth reading and skip, building a cross-group to-do list. The demo runs without a key.
Jev Tools & CLIs#community#catalog-import#logicrw
Communityadkid-zephyr/work-with-jevJavaScript
AlphaOptimizer
4GitHub stars
Open-source tool from AlphaTales that sits between Codex and large command outputs: it chunks logs and search results, uses Jev to rank the relevant chunks when a Jev API key is configured, and stores the full output locally for retrieval by artifact ID.
Jev Integrations & Adapters#community#catalog-import#logicrw
Communityalpha-tales/alphaoptimizerTypeScript
Jev Persian Benchmark
4GitHub stars
Benchmark harness comparing Jev, Jeff, Mizan and Laya on 480 authored general Persian questions, 560 literary questions and a 24-excerpt classical poetry pilot, with raw responses saved and answers scored locally without a runtime model judge.
Jev Benchmarks & Evaluations#community#catalog-import#logicrw
Communityarmanjr/jev-persian-benchmarkPython
JevEmon
4GitHub stars
A demo that walks a real Pokémon FireRed ROM: the code reads the overworld out of RAM, works out every reachable destination, and Jev picks where to go — and how to fight wild encounters — through typed decisions, not screenshots.
Jev Demos & Experiments#community#catalog-import#logicrw
Communitydaniel4x/jevemonHTML

Start here with the Jev AI model

Hand-picked entries the maintainers recommend first, from official primitives to community tools.

Jev: For the Builders AND Dreamers (Jev 1.14)
The Jev Day release post: Jev 1.14.0 under jev-preview plus three danger-zone features — composable images on both models, the box question type on 1.14 only, and opt-in 262k context.
Jev Guides & ArticlesArticle#official#release#vision
Official
Box Questions (Dreamer-Ready)
The box question type: one bounding box per question, returned as four edges that are fractions of the image, plus confidence, with no criteria field and no not-found value.
Jev Practices & PatternsDocs#official#docs#vision
Official
Jev 1.14 Day 0 Support in LiteLLM
LiteLLM's Day 0 post for TypeSafe Jev 1.14: the proxy adds box questions, image input and long-context mode on both POST /v1/systemone and POST /v1/decisions, forwarding TypeSafe-Danger-Zone headers only to TypeSafe deployments.
Jev Integrations & AdaptersArticle#community#litellm#gateway
Community

Newest Jev AI model resources

The latest additions to the directory, newest first.

From the Jev community

Watch walkthroughs, read the threads, and see what builders are posting.

YouTube: KodeKloud's three-minute primer: what a System One model decides, and why it answers in milliseconds.

YouTube: Caleb Writes Code explains what Jev is and how to call it, in seven minutes.

YouTube: Greg Isenberg and Ryan Vogel on the businesses Jev unlocks, and a path in through the Vercel AI Gateway.

YouTube: CJ from Syntax demos browser use, classification, code review, a model router, and a chat bot with no LLM.

YouTube: Ryan Vogel runs Jev on 100 and then 1,000 emails: category, priority, spam, and reply predictions.

YouTube: AICodeKing tests support routing, refund detection, prompt-injection resistance, and browser automation.

Hacker News: Show HN: Ad Spend Guard gates budget before the auction, not the creative after.

Show HN: Gating ad budget with a decision modelRead the thread on Hacker News

Reddit: Reranking rebooking options with a decision model, ranked with reasons.

Hacker News: Pick Verify: a single decision at the warehouse pick station catches confusable picks.

Show HN: Verifying robot picks with a decision modelRead the thread on Hacker News

Hacker News: Decision Index 0.2.1 scores open reproductions of Jev on a frozen suite.

jackbravo4 pointsDecision Index 0.2.1 – 70 open reproductions of TypeSafe Jev's Decision ModelRead the thread on Hacker News

Hacker News: Software Bombe and live Enigma demo where Jev ranks cribs and judges plaintext.

ag_212 pointsShow HN: Jev as the Bletchley Park Analyst: A Software Bombe on EnigmaRead the thread on Hacker News

Hacker News: Show HN for the decide CLI: brew install, file context, and multi-question shell scripts.

vsekhar2 pointsShow HN: Decide – Jev decisions in the shell, scripts, and agent skillsRead the thread on Hacker News

Follow @typesafeai

How entries are chosen

Every entry is reviewed against the same bar, whether it comes from TypeSafe or the community.

  • Public and working — no paywalls, sign-up walls, or dead links.
  • Concrete — it has to be about Jev and the System One API, not generic LLM content.
  • Useful today — something a developer can learn from or use right now.
  • Distinct — if a similar entry exists, the description has to say what makes this one different: a different runtime, a cheaper path, a measured result, or a narrower focus.
  • Documented — repos state their license, and docs are in English or carry an English summary.

Spam, affiliate links, and thin AI-generated content are rejected. New entries are expected to ship with a deep dive: two to five highlights, caveats, a quickstart snippet where one helps, and a verification date. Star counts are refreshed when an entry is touched.

Common questions

Short answers about Jev and how this directory works.

What is the Jev AI model?

Jev is TypeSafe AI's first System One model — an AI model that takes a state plus typed questions and returns one structured answer per question: a choice, an ordered score, or the probability of yes, with calibrated confidence on Choice and Score answers. Code can branch on the result without parsing generated text.

What is the difference between Choice, Score, and Noul?

They are the three question primitives. Choice picks one of up to 255 options, Score rates on 2 to 10 ordered levels, and Noul answers yes or no. Choice and Score answers carry a confidence between 0 and 1; a Noul answer is the probability of yes.

Which Jev SDKs and client libraries are available?

TypeSafe maintains official JavaScript/TypeScript and Python SDKs plus a Python adapter. The community has built clients for Go, .NET, PHP, Laravel, Rust, Elixir, Ruby, and Scala, along with framework integrations such as DSPy, LlamaIndex, and Home Assistant. All of them are listed in the Repos & SDKs category.

Is the directory free, and is it affiliated with TypeSafe AI?

The directory is free to browse: every entry is reviewed, and spam, affiliate links, and sign-up walls are rejected. JevDirectory.org is community-run and not affiliated with TypeSafe AI — Jev and System One are TypeSafe AI trademarks.

How often is the directory updated?

Entries are added as new resources appear and re-checked when they are touched. The directory currently holds 3919 entries from 293 source sites, last updated Nov 6, 2026.

What is a verified deep dive?

Most entries include a deep dive: two to five highlight bullets someone would only know from using the resource, a caveats note about limits and requirements, an optional quickstart snippet, and the date the link was last checked. 3919 of the 3919 entries carry one today.

For the canonical details, read the official TypeSafe docs and the API reference.