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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
3,904
Categories
11
Official
102
Community
3,802
Source sites
293
Deep dives
3,904

By format

3904
  • Docs169
  • Repos & sites3095
  • Videos74
  • Posts104
  • Articles384
  • 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 3904 Jev AI model resources

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

Showing 3649–3696 of 3904 resources

quackd
263GitHub stars
A Python CLI that connects multiple robots under one contract with an optional Jev stepper: Jev picks among permitted discrete calls while an LLM writes poses and prose and the executor enforces safety gates.
Jev Tools & CLIs#community#python#robotics
Communityrokbenko/quackdPython
EmbodiedJev
308GitHub stars
A MuJoCo and Franka Panda workbench where Jev chooses the next manipulation step for pick-and-place, stacking, and obstacle-carry tasks, with rule baselines and side-by-side model comparison.
Jev Cookbooks#community#python#robotics
CommunityFBddcz/embodied-jevPython
Hippo
781GitHub stars
A local SQLite memory layer for CLI agents with an opt-in Jev reranker that batches Noul judgments over the top 40 recalled memories and falls back to a local cross-encoder on errors.
Jev Tools & CLIs#community#typescript#agents
Communitykitfunso/hippo-memoryTypeScript
TipTour
681GitHub stars
A macOS menu bar app that turns a typed click task into desktop actions: Jev picks from locally detected controls, TipTour executes and validates each action, and a separate Gemini mode handles voice.
Jev Tools & CLIs#community#swift#macos
Communitymilind-soni/tiptour-macosSwift
Jev-cu
622GitHub stars
An experimental Codex skill and JavaScript runtime that has Jev pick macOS Accessibility elements and actions from text candidates, while local policy gates hold sensitive operations for human confirmation.
Jev Tools & CLIs#community#javascript#codex
CommunitySac-Y/Jev-cuJavaScript
Awesome Jev / TypeSafe
595GitHub stars
A community field guide to TypeSafe's Jev with one documented support-ticket call, runnable JavaScript and Python starters, a JSON directory, and links to independent evaluations.
Jev Guides & Articles#community#awesome-list#sdk
CommunityAbdelStark/awesome-typesafe-jevHTML
Awesome Jev Skills
629GitHub stars
A collection of Jev demos, workflows, and agent skills for coding agents: five installable skills and 108 scenarios, installed by pointing Codex, Claude Code, or OpenCode at an agent prompt.
Jev Tools & CLIs#community#python#skills
Communitywuyoscar/jev-skillPython
SlidePilot
8GitHub stars
Experimental Slidev addon that streams presenter voice through a Cloudflare Worker, where Jev answers four typed questions before TypeScript applies the navigation policy and advances the deck.
Jev Repos & SDKs#community#typescript#cloudflare
Communityharshil1712/slidepilotTypeScript
Safer with Jev
5GitHub stars
Neon Function proxy and showcase site that puts request bodies to Jev: the judgment is the URL path, and bodies that pass can be forwarded unchanged to a caller-chosen HTTPS target.
Jev Tools & CLIs#community#typescript#gateway
Communityandrelandgraf/safer-with-jevTypeScript
TypeSafe SDK for Java
12GitHub stars
Community Java 17 client for TypeSafe's System One API with typed Noul, Choice and Score questions, lambda-style builders for nested criteria, status-specific exceptions and a Spring Boot starter.
Jev Repos & SDKs#community#java#sdk
CommunityPremo-Cloud/typesafe-sdk-javaJava
jev-mobile
10GitHub stars
Experimental Android sub-agent that gives Jev a bounded list of technically valid UI actions per step, with requirement-driven subgoals, durable SQLite tasks, confidence gates and escalation instead of coordinates.
Jev Tools & CLIs#community#python#agents
CommunityFriedjof/jev-mobilePython
sqlite3-jev
3GitHub stars
SQLite C extension that exposes Jev as SQL functions (jev_noul, jev_choice, jev_score) so queries can classify states such as ticket bodies directly, with only libcurl as a dependency.
Jev Tools & CLIs#community#sql#data
Communitymattn/sqlite3-jevC
Jev DSPy Lab
16GitHub stars
Unofficial companion to dspy-typesafeify that records and replays TypeSafe calls to measure calibration, selective risk, confidence-gated abstention, latency, tokens and modeled cost for Jev decisions.
Jev Practices & Patterns#community#python#evaluation
Communityjmanhype/jev-dspy-labPython
PageGrade
7GitHub stars
WXT Chrome extension that grades readable page sections with Jev through Vercel AI Gateway, giving each section ten rubric scores and each page an inspectable A-E grade.
Jev Tools & CLIs#community#typescript#chrome-extension
Communitykitze/pagegradeTypeScript
jev-skill-gate
8GitHub stars
Claude Code hook that scores installed skills against your prompt with Jev and writes skillOverrides so irrelevant skills stay out of context; a local TF-IDF ranker runs when no API key is set.
Jev Tools & CLIs#community#javascript#claude-code
CommunityShivamPansuriya/jev-skill-gateJavaScript
jev-resilience
2GitHub stars
Spring WebFlux starter that asks Jev whether HTTP 200 responses actually encode a failure, converting suspected silent failures into SemanticFailureException for existing error handling.
Jev Repos & SDKs#community#java#spring-boot
CommunityVicente-MD/jev-resilienceJava
2048 × Jev
5GitHub stars
Browser lab where every 2048 move is one Jev Choice over the four directions with no heuristic fallback, surfacing the probability distribution, confidence, latency and token cost live.
Jev Cookbooks#community#typescript#games
CommunityARCJ137442/jev-2048TypeScript
jev-logtriage
3GitHub stars
CLI that collapses Loki log batches and asks Jev six typed questions in one call, then maps the answers in code to suppress, watch, review, notify, page or an auto-remediation candidate.
Jev Tools & CLIs#community#python#cli
Communityjyatesdotdev/jev-logtriagePython
json-render
18.7kGitHub stars
Generative UI framework with an experimental Jev composer that selects components and layout from application-supplied candidates through Vercel AI Gateway, rendering catalog-constrained JSON specs.
Jev Repos & SDKs#community#typescript#vercel
Communityvercel-labs/json-renderTypeScript
tax-doc-classifier
509GitHub stars
Text-only classifier for 261 federal tax forms that sends each PDF page's text to Jev, which returns a probability over forms and page kinds behind a confidence gate; no model is trained.
Jev Repos & SDKs#community#typescript#classification
Communitykyotofin/tax-doc-classifierTypeScript
jev-orderby-bench
0GitHub stars
Independent measurement of whether ORDER BY over a Jev probability is defensible, pre-registering gates on pairwise inversion, Score ordinality, calibration, and negation and paraphrase invariants.
Jev Practices & Patterns#community#python#benchmarks
Communityyodablocks/jev-orderby-benchPython
JevBench
282GitHub stars
Independent cross-model benchmark for Jev-class decision models, running 534 frozen cases per complete entrant with scoring code and a four-axis score of accuracy, calibration, latency and cost.
Jev Practices & Patterns#community#python#benchmarks
Communityfstandhartinger/jevbenchPython
Laya
33.3kGitHub stars
Open multilingual System 1 decision models with published checkpoints for choice, score and noul questions, plus a router that dispatches each request to the right checkpoint in one forward pass.
Jev Repos & SDKs#community#python#open-models
CommunityNandhaKishorM/layaPython
swift-typesafe
17GitHub stars
Unofficial Swift 6.4 client for TypeSafe's System One API, following the Python SDK 0.7.0 API with @QuestionSet property wrappers for typed Noul, Choice and Score questions.
Jev Repos & SDKs#community#swift#sdk
Communityainame/swift-typesafeSwift
human-compiler
1GitHub stars
Cloudflare Worker and React app that sends pasted corporate prose through about 45 typed Jev questions, then emits rustc-style diagnostics for passive-aggression, urgency and information density.
Jev Cookbooks#community#typescript#cloudflare
Communityasfarsadewa/human-compilerTypeScript
Jev Wrapped
3GitHub stars
Telegram channel X-ray that judges up to 1,500 public posts from the last year with one Jev Choice over ten post kinds and three Noul checks, then draws a shareable monthly mix card.
Jev Tools & CLIs#community#javascript#cloudflare
Communitygaborishka/jev-wrappedJavaScript
Low-latency audio decisions POC
2GitHub stars
Private TypeScript proof of concept that flags Spanish profanity with Jev Boolean and Score questions and replaces the matching word intervals with a beep via ffmpeg, keeping the original duration.
Jev Tools & CLIs#community#typescript#moderation
Communitysantos-sanz/jev-audio-beeperTypeScript
jev-playground
0GitHub stars
A MoonBit playground for TypeSafe's Jev: a client for GET /v1/models and POST /v1/systemone with noul, choice, and score questions, a single-query CLI, a Jev-vs-Jev gomoku game, and a tool that replays game logs as real-time GIFs.
Jev Repos & SDKs#community#moonbit#cli
Communitymizchi/jev-gomokuMoonBit
PocketJev
1GitHub stars
An experimental iOS app that turns an on-device Qwen3-VL model into a multiple-choice decision tool: it reads next-token logits for A/B/C and scores 2-26 supplied options without generating any text.
Jev Cookbooks#community#swift#ios
CommunityNullPo-jp/PocketJevSwift
ASSAY-001
0GitHub stars
A pre-registered, independently rescored audit of Jev's calibration and type safety: calibrated on CLINC150 (ECE 0.0204), systematically overconfident on Banking77 (ECE 0.0936), and zero type errors across 8,576 responses.
Jev Practices & Patterns#community#python#calibration
Communityjourdanlabs/assay-001Python
jevbetter
15GitHub stars
A from-scratch one-pass option scorer that maps a context and a changing list of text options to one probability per option, adding a hashed n-gram encoder, rival-aware attention, a gated head, and temperature scaling; JSONL data is drop-in compatible with jevlike.
Jev Practices & Patterns#community#python#calibration
Communityolanotolu/jevbetterPython
RoboJEV
59GitHub stars
Two-stage Jev control of a Franka Panda in MuJoCo: Jev selects a task intent, then X/Y/Z directions and a gripper command executed against real contacts, with 43 of 50 Jev episodes succeeding versus 48 of 50 for a rule baseline.
Jev Cookbooks#community#python#robotics
Communitylykycy123/RoboJEVPython
AI CLI
825GitHub stars
Vercel Labs' terminal CLI for the AI SDK: its `ai evaluate` command answers named Boolean, Choice, and Score questions, with Jev as the default evaluation model and one unchanged input shared across all questions.
Jev Tools & CLIs#community#typescript#cli
Communityvercel-labs/ai-cliTypeScript
typeful-triage
4GitHub stars
A multiplayer triage dashboard for public GitHub repos: issues and PRs sync into Postgres, Rocicorp Zero replicates them live, and Jev answers typed questions about each one, including what a maintainer should do next, with human corrections kept.
Jev Tools & CLIs#community#typescript#postgres
Communitycephalization/jev-triageTypeScript
Robo Harness
4GitHub stars
An SO-101 workbench where an evaluation model or rules baseline picks bounded joint steps from typed candidate actions: decision runs are spend-capped via the Vercel AI Gateway and drive a real LeRobot arm or mock hardware.
Jev Cookbooks#community#typescript#robotics
Communitygrmkris/robo-harnessTypeScript
NeuroLink
157GitHub stars
A Juspay TypeScript SDK that treats Jev as a third inference type beside generate and stream: providers declare which kinds they serve, and tryDecide returns typed boolean, choice, or score answers, null when no decision provider is set.
Jev Repos & SDKs#community#typescript#sdk
Communityjuspay/neurolinkTypeScript
openjev
134GitHub stars
One-pass option scoring with a local Gemma 3 4B on Apple silicon via MLX: it prefills the context once, expands that KV cache across the option batch, and scores every option in a single padded forward pass with no decoding.
Jev Practices & Patterns#community#python#open-models
Communitydaseinlabs/open-jevPython
OpenJev (Verdict)
110GitHub stars
An encoder-side reproduction of Jev built on a retrained GLiClass ModernBERT base (151M): it evaluates multiple typed questions in one non-autoregressive forward pass, returning choices, ordinal scores, and probabilities under 35 ms.
Jev Practices & Patterns#community#python#open-models
CommunityHeman10x-NGU/Verdict-open-jevPython
Jevmail
101GitHub stars
A local, read-only Gmail triage app that sorts mail into five trays with Jev: each message becomes one experimental_evaluate call answering tray, urgency, and human-written questions, and 1,000 emails sort in about a minute for around 3 cents.
Jev Cookbooks#community#typescript#privacy
Communityfazlerocks/jevmailTypeScript
Jev Desktop for Codex
75GitHub stars
A Codex Computer Use plugin that adds bounded Jev decision loops: Codex scopes the task and defines allowed actions, Jev picks an operation and compatible target in one request, and Computer Use performs the click, fill, scroll, or shortcut.
Jev Tools & CLIs#community#javascript#codex
Communityyikangy873-gif/jev-desktopJavaScript
reflex
169GitHub stars
An open re-creation of Jev's decision model on an open-weights Qwen3.5-4B: it answers a list of typed questions in one forward pass over POST /v1/systemone in about 200 ms, never writing free text.
Jev Practices & Patterns#community#python#open-models
Communitykshetrajna12/reflexPython
Formanator
102GitHub stars
A Rust CLI and MCP client for Forma benefit claims that can use optional Jev Choice questions to select from an account's valid benefit/category pairs, falling back to an LLM when Jev finds no match or is not confident.
Jev Tools & CLIs#community#rust#cli
Communitytimrogers/formanatorRust
Jev DSH Decision Engine
256GitHub stars
A structured decision plugin for agent harnesses: Jev recommends among currently available and permitted tools, skills, and agents, and evaluates output quality, returning choices, probabilities, and confidence while the host agent keeps planning and execution.
Jev Tools & CLIs#community#javascript#agents
CommunityDevin-AXIS/jev-dsh-decisionJavaScript
Jev Voice
121GitHub stars
A hands-free macOS voice assistant: whisper.cpp transcribes locally in about 100 ms, then one roughly 250 ms Jev request selects a typed action plus arguments, and code executes it against the Mac.
Jev Tools & CLIs#community#python#voice
Communitykevinbadi/jev-voicePython
jev-lint
120GitHub stars
An ast-grep semantic linter where each rule is one natural-language question judged by Jev: 98 rules flag name/body drift, stale comments, weak tests, quiet failures, and commits whose diffs contradict their messages.
Jev Tools & CLIs#community#typescript#cli
Communitymizchi/jev-lintTypeScript
Agent Router
115GitHub stars
A local-first Herdr CLI that filters your agent subscriptions with fixed eligibility rules, then asks TypeSafe Jev to rank the remaining Cursor, Claude Code, Codex, or OpenCode options and pick a reasoning effort.
Jev Tools & CLIs#community#typescript#cli
Communitynidhi-singh02/agent-routerTypeScript
jev-chat-jarvis (macOS)
498GitHub stars
A macOS floating panel that reads visible WeChat messages through OCR, has a local decider model or TypeSafe Jev classify intent and risk from 0 to 9, then generates and reranks reply candidates without injecting anything into WeChat.
Jev Tools & CLIs#community#python#macos
Communityjev-chat/jev-chat-jarvis-macPython
jev-gateway
319GitHub stars
A local gateway for coding agents that asks Jev which tool to call each turn and steers the LLM when Jev is confident, while every other request goes to your usual provider untouched.
Jev Tools & CLIs#community#typescript#gateway
Communityvinilana/jev-gatewayTypeScript

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 3904 entries from 293 source sites, last updated Nov 5, 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. 3904 of the 3904 entries carry one today.

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