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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
3,724
Categories
11
Official
102
Community
3,622
Source sites
292
Deep dives
3,724

By format

3724
  • Docs169
  • Repos & sites2965
  • Videos73
  • Posts103
  • Articles344
  • Playgrounds70

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 3724 Jev AI model resources

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

Showing 289–322 of 322 resources

JevLang
1GitHub stars
A policy engine for LLM decisions: declare routes, gates and actions once in TypeScript or Python and every decision comes back validated, explainable, replayable and audited. The model answers only declared questions — application code owns the branch.
Jev Repos & SDKs#community#catalog-import#logicrw
Communitytimmikeladze/jevlangJavaScript
Jev at the Junction
1GitHub stars
A local proof of concept where Jev picks which of two conflicting signal phases gets the green light at a real Hong Kong intersection, using near real-time keyless open-data traffic sensors. A phase-timing state machine enforces minimum and maximum green, amber and all-red around the model's answer.
Jev Demos & Experiments#community#catalog-import#logicrw
Communitytrycatchkamal/typesafe-jev-traffic-demoPython
Jev Inbox Queue
1GitHub stars
Turns an inbox into a short action queue: Jev answers seven typed questions per email thread in one request, plain Python rules decide what enters the queue, and cached answers mean changing a rule never needs new API calls.
Jev Tools & CLIs#community#catalog-import#logicrw
Communitytusharck/jev-inbox-queuePython
el-jev
1GitHub stars
A fast typed-decision sidecar and GitHub Copilot CLI pre-turn hook that mimics Jev's choice, noul and score primitives on Azure AI Foundry Cohere with keyless Entra ID auth. By default, non-trivial decisions stay advisory until calibration is fitted on labelled data.
Jev Integrations & Adapters#community#catalog-import#logicrw
Communityvijaycinn/el-jevPython
Intent Routing with TypeSafe's JEV Model
1GitHub stars
Python intent classification for customer support: Jev picks from twelve intents and returns a confidence score plus a per-intent probability distribution, flagging anything below 0.8 confidence as needing clarification while routing stays configurable downstream.
Jev Repos & SDKs#community#catalog-import#logicrw
Communityviniciusfinger/jev-intent-classificationPython
Jev Codex Factory
1GitHub stars
A Jev-powered multi-agent coding factory for OpenAI Codex: one engineering request is routed to a model and effort lane or decomposed into a task DAG, workers run in parallel, verification gates every change, and failures get classified instead of blindly retried.
Jev Agents & MCP#community#catalog-import#logicrw
Communityvyetgokyra/jev-codex-factoryPython
Pi · Jev Compaction
1GitHub stars
Decision-driven, extractive context compaction for the Pi coding agent: Jev judges complete read-only tool pairs and ordinary code removes the ones it rates unnecessary, keeping retained records in a JSON-lines transcript packet instead of a generated summary.
Jev Agents & MCP#community#catalog-import#logicrw
Communitywang-auspicious/pi-jev-compactionTypeScript
jev-trade
2GitHub stars
A simulated high-frequency crypto trading loop that makes its buy and sell calls with Jev: recent BTC and ETH prices and volumes go in, a typed confidence-aware decision comes out, and a cost-aware execution simulator turns it into P&L. Not live trading.
Jev Demos & Experiments#community#catalog-import#logicrw
Communitywaxmell114514/jev-tradePython
Jev Console
1GitHub stars
A small desktop console and CLI for Jev: paste a state, add noul, choice and score questions by hand, and read calibrated probabilities back without writing code. Standard library only, with a tkinter window whose labels are in Chinese.
Jev Tools & CLIs#community#catalog-import#logicrw
Communitywenchenxi/jev-consolePython
pi-observational-memory-jev
1GitHub stars
A pi coding-agent extension that compacts long transcripts without rewriting them: Jev answers only keep/kind questions about chunked history, original lines go into a verbatim ledger, and compaction is a deterministic render plus durable topic files. Calls the TypeSafe System One endpoint directly.
Jev Integrations & Adapters#community#catalog-import#logicrw
Communitywillfish/pi-observational-memory-jevTypeScript
typesafe-jev-tools
1GitHub stars
A Claude Code hook that fires when you write code containing an LLM call or a hand-written classifier and injects a three-way test: plain code, a frontier model, or the System One band where Jev lives. It never blocks; the GitHub description cites a measured 149-row Jev vs Claude Haiku 4.5 comparison.
Jev Integrations & Adapters#community#catalog-import#logicrw
Communitywotai-dev/typesafe-jev-toolsTypeScript
Jev Projects
1GitHub stars
A community site listing projects built on TypeSafe Jev, deployed at jev-projects.vercel.app from a JavaScript repository whose GitHub description is simply 'list of projects that use typesafe's jev'. No README is published, so the site itself is the main description of what it contains.
Jev Guides & Articles#community#catalog-import#logicrw
Communityx0ef/jev_projectsJavaScript
jev-toolspace
1GitHub stars
A Python research harness evaluating Jev (TypeSafe System One, jev-1.13.0) as a relevance judge for task-level tool spaces. One API call scores every tool with a yes/no noul question per tool, and the repo benchmarks keep-all versus per-request, per-task and trace-based spaces on TGB and BFCL.
Jev Benchmarks & Evaluations#community#catalog-import#logicrw
Communityxuan7zhang/jev-toolspacePython
jev-charactor
1GitHub stars
A modular TypeScript framework for role-playing agents and autonomous game NPCs powered by Jev: principles are authored in natural language, Jev selects eligible actions and communicative intents, and the host applies world effects and composes dialogue. Ships Fog Harbor, a playable 2D AI-town demo.
Jev Repos & SDKs#community#catalog-import#logicrw
Communityyichenbc/jev-charactorTypeScript
Jev Xiangqi
1GitHub stars
Play Chinese Chess against Jev: every AI move fans out a Score 0-4 question per legal move in a single system_one() call, then plays the highest-scoring move. No minimax and no eval tables, just Jev's read of the position, with the top 10 shown as score bars.
Jev Demos & Experiments#community#catalog-import#logicrw
Communityzafer-liu/jev-xiangqiHTML
Jev Context
1GitHub stars
A local Codex plugin for codebase search: it runs ripgrep, asks Jev a binary Yes/No relevance question for each candidate passage, and returns those above a probability threshold (default 0.50). Codex can expand results or surrounding context without extra Jev calls.
Jev Integrations & Adapters#community#catalog-import#logicrw
Communityzbush/jev-contextJavaScript
jevinf
1GitHub stars
A Jev-kind model inference engine and compatible API server in Python: each candidate path runs as segmented forwards with prefix reuse, and the Jev wire contract is served on top with NanoJev as the wired backend. The README reports 2.57x single-request throughput on MPS at 100% argmax agreement.
Jev Repos & SDKs#community#catalog-import#logicrw
Communityzerodegress/jevinfPython
Jev Browser (Cline plugin)
0GitHub stars
A Cline plugin that gives the agent an isolated Playwright Chromium through a jev_run tool: Jev chooses a concrete operation and target per step via AI SDK 7's experimental_evaluate through the Vercel AI Gateway, and when it picks TYPE_TEXT, gemini-2.5-flash-lite writes the field value.
Jev Integrations & Adapters#community#catalog-import#logicrw
Communityabeatrix/cline-plugin-jev-browserTypeScript
MCP Router
0GitHub stars
An open-source Jev-based MCP router: it discovers, catalogs, classifies and deduplicates every MCP server and tool you have, then exposes each agent only the small, authorized subset it needs for the task. Routing decisions are System One Choice/Score/Noul questions, scored by a pluggable engine at the edge or hosted.
Jev Agents & MCP#community#catalog-import#logicrw
Communityamantux/mcp-routerPython
Turing Jail
0GitHub stars
A three-level AI interrogation game powered by TypeSafe Jev System One: write a statement, face the warden's verdict built from live structured analysis of plea, logic and paradox, and try to earn your release. Runs on Bun with SQLite locally and Neon/Postgres in production.
Jev Demos & Experiments#community#catalog-import#logicrw
Communitybugkiwi/turing-jailTypeScript
Vibe SDK
0GitHub stars
A JavaScript package of SDK code built through iterative 'vibing', listed in logicrw's awesome-jev-projects; the repository ships code but almost no documentation.
Jev Repos & SDKs#community#catalog-import#logicrw
Communitydotnetvibecoderz/vibe_sdkJavaScript
JevFilterForX
0GitHub stars
A browser extension that scores X timeline posts in real time with Jev and folds low-signal content while keeping it expandable. Posts are rated 0-100 on information signal, actionability and originality, and without an API key the extension runs in local mock mode.
Jev Tools & CLIs#community#catalog-import#logicrw
Communitygrayrepo-byte/jev_filter_for_xTypeScript
slopcheck
0GitHub stars
A CLI and Claude Code Stop hook that reports which AI tells a passage contains, quoting the line and a probability instead of judging whether AI wrote it. Regex checks 18 tells for free, one Jev call judges 15 more, and code owns every threshold.
Jev Tools & CLIs#community#catalog-import#logicrw
Communityharshpuri84/slopcheck-jevPython
pi-jev-compact
0GitHub stars
A Pi extension for selective, verbatim context compaction: Jev scores every tool call and its result, unneeded calls are dropped, and everything kept stays byte-identical. The README measured 15.5% reclaimed on a synthetic window, rising to 33.5% with prose included.
Jev Integrations & Adapters#community#catalog-import#cobanov
Communityilkerulusoy/pi-jev-compactTypeScript
JevPulse
0GitHub stars
A consensus engine for YouTube comments that replaces conversational summarization: Gemini Flash designs a per-video rubric once, Jev evaluates every comment against it in parallel batches, and code computes agreement deterministically. Live at jevpulse.vercel.app.
Jev Tools & CLIs#community#catalog-import#logicrw
Communityjaygajera17/jevpulseJavaScript
fast-jev-compaction-pi
0GitHub stars
A Pi extension that asks Jev, per completed tool call, whether the call and its full result still matter, then applies local keep, truncate or drop rules before compaction. Kept evidence is written verbatim into a Verbatim Tool Evidence block.
Jev Integrations & Adapters#community#catalog-import#logicrw
Communityjoslynsmall/fast-jev-compaction-piTypeScript
jev-decision-gateway
0GitHub stars
A provider-agnostic decision gateway that puts Jev in front of expensive generative LLMs: small bounded questions are batched through Jev, a deterministic policy layer builds the execution plan, and generation runs only when the policy says so.
Jev Integrations & Adapters#community#catalog-import#logicrw
Communitykuldeepsinh19/jev-decision-gatewayTypeScript
Jev demo (customer-service chatbot)
0GitHub stars
A customer-service chatbot routed by Jev: one API call per turn asks every question in the decision tree up front and discards the unneeded answers — the docs' speculative fan-out — with a human-handoff Noul and a frustration Score riding along.
Jev Demos & Experiments#community#catalog-import#logicrw
Communityminghanminghan/jev-demoTypeScript
Cube Lab
0GitHub stars
An interactive Three.js Rubik's Cube that walks the seven-step beginner method: local planners generate candidate formulas from the real sticker state, Jev chooses between them through Choice questions, and a local Node proxy keeps your API key in the browser while requests go to TypeSafe's System One API.
Jev Demos & Experiments#community#catalog-import#logicrw
Communityngocvychu38-web/cube-labHTML
Laya Website Security Copilot
0GitHub stars
A local-first Chrome extension that inventories a page's browser-visible attack surface, runs deterministic checks for mixed content, insecure forms and missing headers, and can add typed Laya or official Jev decisions through an optional gateway. Findings carry severity, confidence and evidence.
Jev Tools & CLIs#community#catalog-import#logicrw
Communitypateti-hub/laya-browser-guardJavaScript
phocinae-server
0GitHub stars
A local FastAPI inference server for the 150M-parameter Phocinae-Largha decision model that speaks the TypeSafe /v1/systemone contract: one POST returns noul, choice and score answers from a single forward pass, serving only 127.0.0.1 and never implementing chat or OpenAI-compatible endpoints.
Jev Repos & SDKs#community#catalog-import#logicrw
Communityphocinae/phocinae-serverPython
jev-planner
0GitHub stars
A CLI that produces repository-aware implementation plans from two or more agents drafting independently, then has Jev score completeness, feasibility and risk coverage, decide whether cross-review is worth it, and select a finalizer that merges the strongest ideas.
Jev Tools & CLIs#community#catalog-import#logicrw
Communityrxova/jev-plannerTypeScript
JEV Gateway
0GitHub stars
A session-aware, OpenAI-compatible gateway that routes chat completions across provider pools by cost, quality, and capability rules, optionally asks configured decision providers typed choice questions with a deterministic fallback, and records requests, decisions, and outcomes in SQLite.
Jev Integrations & Adapters#community#catalog-import#logicrw
Communitytexasoct/jev-gatewayTypeScript
JEV Telegram Filter
0GitHub stars
A local Telegram conditional filter: FastAPI and SQLite listen on 127.0.0.1:18721, tasks batch one account's messages to TypeSafe Jev or a local Laya model, and only hits are shown, with a UI in Traditional Chinese, Simplified Chinese, and English.
Jev Tools & CLIs#community#catalog-import#logicrw
Communitywing9897/jev.tgPython

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 3724 entries from 292 source sites, last updated Oct 24, 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. 3724 of the 3724 entries carry one today.

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