Skip to content
JevDirectory.orgTraffic count unavailable. View site traffic

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 2209–2256 of 3919 resources

system1-fraud-interceptor-demo
0GitHub stars
Local demo that runs Jev and Gemini in parallel over synthetic transactions, comparing decision, latency, tokens, and audit record.
Jev Benchmarks & Evaluations#community#github
Communityordepas/system1-fraud-interceptor-demoTypeScript
Simple-Jev
0GitHub stars
No-code layer that turns plain English into validated Jev schemas, confirming with chips before deterministic execution and verdict card.
Jev Models & Reimplementations#community#github
Communityihatecoding01/Simple-JevTypeScript
Jev_vs_Laya_decision_games
1GitHub stars
Harness pitting Jev against Laya across six game-theory games with identical rules, plus a browser app to watch matches or play against the models yourself.
Jev Demos & Experiments#community#github
Communityminanayernia/Jev_vs_Laya_decision_gamesPython
reflexgate
0GitHub stars
TypeScript gateway that fans one payload out to seven Jev risk and routing questions in one call, then enforces deterministic policy verdicts.
Jev Benchmarks & Evaluations#community#github
CommunityintelliDean/reflexgateTypeScript
JEVChess
0GitHub stars
Minimal Chess.com-styled blitz and bullet chess app where Jev scores legal candidate moves in one parallel pass and reports confidence.
Jev Benchmarks & Evaluations#community#github
Communityvamsi243/JEVChessHTML
jev-access-day
0GitHub stars
Learning scaffold teaching the System One pattern across triage, checkout, dunning, and PR review, with mock, LLM stand-in, and real Jev providers.
Jev Benchmarks & Evaluations#community#github
Communityandreaserradev-gbj/jev-access-dayTypeScript
vibecheck-mcp
0GitHub stars
MCP done-gate for coding agents: it diffs git reality, measures conventions deterministically, asks Jev eight quality questions, and returns a fix list.
Jev Agents & MCP#community#github
CommunityBilalUchiha/vibecheck-mcpTypeScript
demo-video-javascript-jev-starter
0GitHub stars
Demo pairing Vonage Video API with Jev: chat sentiment and frustration scoring offers a video call and pings an employee dashboard.
Jev Agents & MCP#community#github
CommunityVonage-Community/demo-video-javascript-jev-starterJavaScript
jev-enhanced-plugin
0GitHub stars
Agent plugin adding typed Jev judgment packs to six existing coding skills for Codex, Claude Code, and Oh My Pi, without changing their procedures.
Jev Agents & MCP#community#github
CommunityJiaWeiXie/jev-enhanced-pluginJavaScript
speedy-jev
0GitHub stars
Browser extension that asks your saved Jev questions about the selected text or whole page with one click and shows typed answers.
Jev Tools & CLIs#community#github
Communityonlineeric/speedy-jevTypeScript
jev-chat
0GitHub stars
Windows and Android chat app for Jev via Vercel AI Gateway that answers document questions with per-option probabilities and costs.
Jev Demos & Experiments#community#github
CommunityManta-Boardgame/jev-chatHTML
laya-deploy
0GitHub stars
Reproducible deployment turning local open-weight Laya into the judgment backend for oh-my-pi, so small checks run on your own GPU.
Jev Agents & MCP#community#github
CommunityPidbid/laya-deployPython
JEV-Dual-Spectrum-Phishing-Guardian
0GitHub stars
Japanese-focused phishing analyzer scoring messages on classic pressure tactics and GenAI tells, with a 0-100 threat gauge and report export.
Jev Tools & CLIs#community#github
CommunityYuyaForest/JEV-Dual-Spectrum-Phishing-GuardianTypeScript
jev-agent-harness
0GitHub stars
Beginner-friendly harness guide showing Jev as the fast classifier inside agent loops, with ModelRouter and AutoMode middleware examples.
Jev Agents & MCP#community#github
Communitybpmforbusiness/jev-agent-harness
langgraph-jev-router
2GitHub stars
LangGraph conditional edge that uses Jev parallel Choice routing between specialized agents instead of a generative model.
Jev Agents & MCP#community#github
CommunityJTankariya/langgraph-jev-routerPython
jev-site-auditor
0GitHub stars
Site-wide content auditor combining free deterministic regex and structural checks with one batched Jev judgment call per page.
Jev Integrations & Adapters#community#github
Communitytjkimcloud/jev-site-auditorPython
apply-os
0GitHub stars
Career decision-engine spec that scores postings against goals and CV with Jev and drafts guarded, citation-checked cover letters.
Jev Models & Reimplementations#community#github
Communityozzy2438/apply-os
typesafe-ai-lib
0GitHub stars
.NET 10 client for the TypeSafe evaluation API that evaluates a state against typed questions and returns structured answers.
Jev Benchmarks & Evaluations#community#github
Communitytimdinh/typesafe-ai-libC#
jev-crash-course
0GitHub stars
Eleven-level Jev crash course from zero with runnable examples, LiteLLM write-half, and a ticket-triage capstone with tests and evals.
Jev Benchmarks & Evaluations#community#github
Communitynadyth/jev-crash-coursePython
jev-agent-tools
0GitHub stars
Two dependency-free single-file browser tools: an agent loop detector and a skill router powered by Jev decisions.
Jev Agents & MCP#community#github
Communitycodaaiteam/jev-agent-toolsHTML
jev-support-copilot
0GitHub stars
Support-draft co-pilot that scores tone, commitment risk, manager review, and satisfaction in one parallel Jev call over WebSocket.
Jev Tools & CLIs#community#github
Communityzfrqbl-CW/jev-support-copilotJavaScript
jev-feed-guard
0GitHub stars
Build-free Chrome MV3 extension filtering Xiaohongshu and Bilibili feeds by ad class and personal interest with Jev.
Jev Tools & CLIs#community#github
CommunityHejk/jev-feed-guardJavaScript
jev-kit
0GitHub stars
Typed Jev client plus benchmark harness reached through Vercel AI Gateway for measuring accuracy and picking thresholds.
Jev Benchmarks & Evaluations#community#github
CommunityFlorianRiquelme/jev-kitTypeScript
jev-playground
0GitHub stars
Zero-dependency local playground showing six Jev workflows from triage to eval judging with shippable snippets.
Jev Demos & Experiments#community#github
CommunityAviroopPaul/jev-playgroundJavaScript
CMMS-JEV
0GitHub stars
Terminal-first synthetic CMMS where Jev makes six bounded semantic calls and Python validates results into workflow proposals.
Jev Tools & CLIs#community#github
CommunityOm22210564/CMMS-JEVPython
system-one
73GitHub stars
Provider-neutral TypeScript runtime for System One decisions: write choice, noul, and score code once, then run it on TypeSafe Jev, local Reflex, any compatible /v1/systemone endpoint, or a custom provider.
Jev Integrations & Adapters#community#jevbest#catalog-import
Communityiamaamir/system-oneTypeScript
jev-recruiter
52GitHub stars
Local LinkedIn recruiting workspace on Browser Use's Jev Ultrafast: Jev screens titles, drives navigation, and assesses profile excerpts against your brief while a live browser stays visible; matches and evidence export as JSON.
Jev Agents & MCP#community#jevbest#catalog-import
Communityskeptrunedev/jev-recruiterPython
jev-rules
66GitHub stars
Claude Code plugin that asks Jev one yes/no question per rule and passes Claude only the matches, so large rule folders stay out of context until relevant.
Jev Agents & MCP#community#jevbest#catalog-import
CommunityEliaAlberti/jev-rulesJavaScript
jev-sift
48GitHub stars
MCP server that screens files, public webpages, or inline text against a query and returns compact relevance probabilities, so the main agent opens only promising items.
Jev Agents & MCP#community#jevbest#catalog-import
Communitykbhuw/jev-siftJavaScript
duet-agent
50GitHub stars
Agent harness for work that outlives one chat, with resumable turns, routed state machines, and observational memory across sessions and processes.
Jev Agents & MCP#community#jevbest#catalog-import
Communitydzhng/duet-agentTypeScript
computer-use-cache
47GitHub stars
Drop-in OpenAI-compatible cache proxy for repeatable agent workflows: exact hits stay local, and with a TypeSafe key Jev judges whether a cached response is semantically reusable for the current request.
Jev Demos & Experiments#community#jevbest#catalog-import
Communityrohanarun/computer-use-cacheJavaScript
open-jev-typed-decision-engine
46GitHub stars
Open 150M encoder that reproduces the typed noul, choice, and score interface in one forward pass, trainable on a free GPU and runnable locally for nothing.
Jev Demos & Experiments#community#jevbest#catalog-import
Communityintikhab49/open-jev-typed-decision-enginePython
TypeLLM
960GitHub stars
Library that adds schema-guaranteed typed outputs to existing autoregressive LLMs without changing weights, served through SGLang or a hosted API.
Jev Demos & Experiments#community#jevbest#catalog-import
CommunityTypeLLM/TypeLLMPython
solar-mini4-jev
45GitHub stars
Drop-in service that exposes Upstage Solar models through the System One shape, accepting state plus noul, choice, or score questions.
Jev Demos & Experiments#community#jevbest#catalog-import
Communityhunkim/solar-mini4-jevPython
live-jev
45GitHub stars
Mac app that turns one short English or Japanese sentence into Ableton Live mixer, transport, clip, note, device, and track edits from a pop-up bar.
Jev Tools & CLIs#community#jevbest#catalog-import
Communityokinaaudio/live-jevPython
laya-server
103GitHub stars
Self-hosted Docker service and web UI that packages Laya structured-decision inference behind a compatible System One endpoint.
Jev Demos & Experiments#community#jevbest#catalog-import
Community1Panel-dev/laya-serverPython
open-medical-jev
12GitHub stars
Research recipe that fuses two frozen open readers into Jev-style yes/no judgments with a fit-free router, confidence gate, and candidate sets.
Jev Demos & Experiments#community#jevbest#catalog-import
CommunityFeiLiuEM/open-medical-jevPython
jev-robot-control
64GitHub stars
Simulation study that drives one xArm7 apple-to-plate task with Jev, a large reasoning model, and a small model through identical incremental controls.
Jev Demos & Experiments#community#jevbest#catalog-import
Communityopenroboto-ai/jev-robot-controlPython
tocket
38GitHub stars
File-first project notebook where many agents share context in .context/ files while Jev only judges the next step and records it as JSON.
Jev Integrations & Adapters#community#jevbest#catalog-import
Communitypedrocivita/tocketTypeScript
jev-poly-crypto-demo
39GitHub stars
Research dashboard for Polymarket BTC five-minute Up/Down rounds that feeds market state to Jev class scores and paper-trades the edge.
Jev Tools & CLIs#community#jevbest#catalog-import
Communityfrankda/jev-poly-crypto-demoTypeScript
jev-spring-boot-starter
39GitHub stars
Community Spring Boot starter that injects a JevClient into Spring MVC apps to ask typed noul, choice, and score questions against the TypeSafe API.
Jev Demos & Experiments#community#awesomejev#catalog-import
Communitydanvega/jev-spring-boot-starterJava
jev-tree
41GitHub stars
Typed Python planner runtime that turns batched Jev action distributions into executable probability trees and graphs for finite decision tasks.
Jev Integrations & Adapters#community#jevbest#catalog-import
CommunityChuf-H/jev-treePython
OpenJev-Vision
41GitHub stars
Open research toolkit that encodes an image once and answers multiple typed choice, noul, and score questions from a shared distribution, plus a local 0.6B text-decision model.
Jev Demos & Experiments#community#jevbest#catalog-import
CommunityIamBusy/OpenJev-VisionPython
skilled-agent-harness_spec-driven-loops
37GitHub stars
Assistant framework that stores specs, memory, and specialist agents as plain markdown files in your repo for Claude Code, Codex, Opencode, and similar runtimes.
Jev Agents & MCP#community#jevbest#catalog-import
CommunityMichelKerkmeester/skilled-agent-harness_spec-driven-loopsTypeScript
jev-cookbook
433GitHub stars
Chinese-language Jev cookbook with runnable Jupyter notebooks covering the three primitives, 18 official recipes, evaluation method, voice smart-home demo, and local Laya fine-tuning.
Jev Guides & Articles#community#jevbest#catalog-import
Communitydatawhalechina/jev-cookbookJupyter Notebook
djev
115GitHub stars
Example server that exposes Jev-style typed decisions and grounded span reads by seeding DiffusionGemma canvases and reading one denoise step per slot.
Jev Demos & Experiments#community#jevbest#catalog-import
Communitymmastrac/djevPython
call-coach-ai
48GitHub stars
Desktop and web live-call coach that sends transcript lines to TypeSafe Jev after each sentence and shows a 0-100 gauge with a suggested next step.
Jev Tools & CLIs#community#jevbest#catalog-import
CommunityZeroGold/call-coach-aiHTML
jev_local
38GitHub stars
Local unofficial /v1/systemone adapter that serves Choice, Score, and Noul probabilities via first-token LLM judgments or a fine-tuned ModernBERT scorer, including Japanese docs.
Jev Practices & Patterns#community#awesomejev#catalog-import
CommunityArgos1111/jev_localPython

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.