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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 3697–3744 of 3904 resources

typesafe_register
131GitHub stars
A Python script that batch-registers typesafe.ai accounts and creates an API key for each, reporting about six seconds per account single-threaded and about 0.12 seconds multithreaded.
Jev Tools & CLIs#community#python#cli
CommunityFutureppo/typesafe_registerPython
Jev × WebMCP Chrome Extension
131GitHub stars
A Chrome side panel that turns the current page's WebMCP tool schemas into typed Jev questions, predicting the tool call, its arguments, confidence, and latency as you type.
Jev Tools & CLIs#community#javascript#chrome-extension
Communitysdras/jev-webmcp-extensionJavaScript
jev-use
124GitHub stars
Voice and typed computer use for macOS: Jev picks the next on-screen action from the Accessibility tree, macOS performs it, and each step is checked for its real effect. No screenshots are sent.
Jev Tools & CLIs#community#swift#macos
Communitysavka777/jev-useSwift
jev-leftpad
84GitHub stars
A joke npm package that left-pads a string by asking Jev to choose among space_0 through space_10 in one Choice, spending a model call where padStart() would do.
Jev Cookbooks#community#javascript#demo
Communityf/jev-leftpadJavaScript
Laya vs Jev
112GitHub stars
A side-by-side T-Rex game where local Laya runs on Apple Silicon through MLX and hosted Jev uses the TypeSafe API, showing choices, latency, survival streaks, and crash replays on one course.
Jev Cookbooks#community#python#games
Communityvirajbhartiya/laya-vs-jevPython
Jev as a judge for agent evals
108GitHub stars
An experiment comparing Jev with GPT-5.6 Luna, GPT-5.6 Terra, and Claude Sonnet 4.6 as evaluators of five frozen weather-agent runs, measuring pass-or-fail accuracy against human labels plus variance, cost, and latency.
Jev Practices & Patterns#community#python#evaluation
Communitydanielgshea/jev-as-a-judgePython
AgentJev-0.6B
388GitHub stars
An open 0.6B System One decision model that reads unstructured state and typed questions in one forward pass, returning calibrated distributions with zero decoded tokens; weights are published on Hugging Face.
Jev Repos & SDKs#community#python#open-models
Communitymalevrigns/agent-jevPython
Jev workflow builder
151GitHub stars
A multiplayer demo workflow builder for Jev built with Liveblocks: wire Jev and LLM steps together, call the workflow through a REST API, and preview test runs with shared state and cursors.
Jev Cookbooks#community#typescript#demo
CommunityCTNicholas/jev-workflow-builderTypeScript
Agentic RL 零基础教程
128GitHub stars
A 25-chapter Chinese tutorial that goes from reinforcement-learning basics to GRPO training with a runnable minimal-verl example, and closes with a chapter on when judgment tasks should be externalized to Jev instead of trained.
Jev Guides & Articles#community#python#tutorial
Communitycookiespiggy/agentic-rlPython
DomA
145GitHub stars
An open-source browser agent extension for Chrome and Edge that browses, fills forms, clicks, and collects data, letting any extension-capable browser act as an AI browser with your own LLM key.
Jev Tools & CLIs#community#typescript#browser
Communitydom-actions/domaTypeScript
AI Agent Skills
111GitHub stars
A collection of 26 production-ready agent skills for Claude Code, Cursor, Kiro, Windsurf, and OpenCode; four skills call TypeSafe Jev for calibrated Score and Noul judgments and fall back to heuristics when it is unavailable.
Jev Tools & CLIs#community#python#skills
Communityfabricioctelles/skillsPython
Jev Arena
123GitHub stars
A comparison arena that runs the same batch of review comments through Jev and DeepSeek, showing processing time, cost, and per-label results with CSV/Excel import, replay, and offline reports.
Jev Practices & Patterns#community#javascript#benchmarks
CommunityNanmiCoder/jev-arenaJavaScript
Jev Chat
117GitHub stars
A chat-shaped command bar where Jev picks the tool, arguments, confirmation, and reply type each turn, and code calls the MCP servers, so no LLM ever writes the reply text.
Jev Cookbooks#community#typescript#mcp
Communityw3cj/jev-chatTypeScript
save-token-jev
81GitHub stars
A Jev-guided context compaction library for coding agents: instead of summarizing old context, Jev decides which tool calls and results still matter while user and assistant text is kept verbatim.
Jev Tools & CLIs#community#typescript#compaction
CommunityIAmUnbounded/save-token-jev-cleanTypeScript
TypeSafe AI SDK for PHP
2GitHub stars
An unofficial PHP client for the TypeSafe AI System One API with typed Noul, Choice, and Score responses, synchronous and Guzzle-promise calls, model discovery, retries, and PSR-3 logging.
Jev Repos & SDKs#community#php#sdk
CommunityButochnikov/typesafe-sdk-phpPHP
jeff
303GitHub stars
A self-hosted implementation of TypeSafe's Jev System One API powered by the 400M-parameter GLiFormer encoder: it serves choice, score, and noul and drops into the official typesafe-sdk via TYPESAFE_BASE_URL, but trails Jev on reasoning-heavy tasks.
Jev Practices & Patterns#community#python#open-models
Communitylogan-markewich/jeffPython
MemSearch
2.8kGitHub stars
A cross-platform memory layer for AI coding agents: conversations from Claude Code, Codex, DeepSeek Harness, OpenClaw, and OpenCode become Markdown memories indexed in Milvus, with optional Jev reranking through the TypeSafe API.
Jev Tools & CLIs#community#python#agents
Communityzilliztech/memsearchPython
Beacon
1.8kGitHub stars
An open-source, local-first memory layer that captures session history across Claude Code, Cursor, Codex, OpenCode, Cline, and 20+ other harnesses, then has Jev judge bounded, redacted trace projections for reusable lessons a person reviews.
Jev Tools & CLIs#community#go#agents
CommunityAsymptote-Labs/agent-beaconGo
awesome-jev-tools
748GitHub stars
A curated list of public projects and practices built on Jev: 212 entries across 13 categories, from classification and routing to agent decisions, calibration, infra/SDKs, and finance, with explicit inclusion rules.
Jev Guides & Articles#community#awesome-list#agents
Communityv-modal/awesome-jev-tools
Awesome Jev
975GitHub stars
An independent, community-maintained catalog of open-source projects built with Jev, citing public evidence behind each entry it lists.
Jev Guides & Articles#community#typescript#awesome-list
Communityheyjunpenn/awesome-jevAstro
tinystruct
362GitHub stars
A lightweight, pluggable Java framework for CLI, HTTP, and modular applications that carries Jev, TypeSafe, and MCP-server topics; added from Maven as org.tinystruct:tinystruct and requiring JDK 17 or higher.
Jev Repos & SDKs#community#java#cli
Communitytinystruct/tinystructJava
OpenAI Scala Client
255GitHub stars
An async Scala client for the OpenAI API and multiple providers, with a dedicated TypeSafe AI adapter that answers Jev System One typed questions alongside Anthropic, Gemini, Groq, and Perplexity support.
Jev Repos & SDKs#community#scala#sdk
Communitycequence-io/openai-scala-clientScala
jev-chat-windows
817GitHub stars
A Windows WeChat side panel that reads the visible conversation with local RapidOCR, has Jev judge intent and tension and rank three reply candidates, then fills the chosen one into the input box; sending is always manual.
Jev Tools & CLIs#community#python#windows
Communityjev-chat/jev-chat-windowsPython
Jev X Sentiment Analysis
218GitHub stars
An on-demand crypto decision-support terminal that ingests 50-1,000 tweets through a two-tier statistical pipeline, then has Jev's System One answer four typed questions and return a decision card with entry ranges, stop losses, and targets without executing trades.
Jev Tools & CLIs#community#python#trading
Communitybrainstormity/Jev-X-Sentiment-AnalysisPython
Reticle
1.3kGitHub stars
An MCP server and agent skill that verifies coding-agent work by driving the real running app and returning pass, fail, or couldn't-tell verdicts with the file:line to fix; its listing frames the approach as Jev-style machine-native runtime perception.
Jev Tools & CLIs#community#typescript#mcp
Communityreticlehq/reticleTypeScript
AI Stock
357GitHub stars
A Python multi-agent stock research workspace covering 12 markets with optional JEV trading decisions: configure a TypeSafe key, select the JEV decisions-only strategy, and get buy/sell/hold, probabilities, and confidence without a research report.
Jev Tools & CLIs#community#python#trading
CommunityEthanAlgoX/AIStockPython
socai
243GitHub stars
A local browser agent that reads social media by driving your signed-in Chrome across Xiaohongshu, TikTok/Douyin, Instagram, and LinkedIn; a companion Jev Social demo lets Jev choose bounded socai CLI operations and produce a source-linked report.
Jev Tools & CLIs#community#rust#browser
Communitysocai-io/socaiRust
Glowbom OSS
164GitHub stars
An open coding-agent workflow where every project has a Project Book that people and agents can read; it wires in Jev as an optional helper for small decisions like whether a build looks healthy, through OpenCode Zen's free Jev endpoint with no separate key.
Jev Tools & CLIs#community#go#coding-agent
Communityglowbom/glowbom-ossGo
Stanley
117GitHub stars
A Jev-first command-line coding agent: natural-language requests are routed by Jev to one of ten bounded review and triage workflows, and unsupported requests fall back to the Pi coding agent or a workflow Stanley stages for promotion.
Jev Tools & CLIs#community#typescript#cli
Communitydevagrawal09/stanley-codeTypeScript
Jev × LIBERO
83GitHub stars
A fine-grained robot control study loop for LIBERO tasks: Jev layers an intent, a contact or motion family, and one of 27 control inputs, while reversible MuJoCo previews evaluate each candidate before execution.
Jev Cookbooks#community#python#robotics
CommunityDimweaker/jev-liberoPython
Vibe Check for X
50GitHub stars
A Chrome and Firefox extension that scores a draft X post with Jev before posting: virality, clarity, ragebait, insult level, regret risk, and typo detection, plus a Send it / Sleep on it verdict.
Jev Tools & CLIs#community#javascript#chrome-extension
CommunityRafalWilinski/vibecheckJavaScript
pi-jev (semantic tool router)
66GitHub stars
A Pi coding-agent extension that routes tools and skills with Jev: one pass activates only what a prompt needs, with opt-in model selection, tool-call guards, and compaction.
Jev Tools & CLIs#community#typescript#coding-agent
CommunityTheoOliveira/pi-jevTypeScript
RefGarden
35GitHub stars
A local 3D reference gallery where Jev chooses search phrases and highlights matching Met, NASA, Cosmos, and Prelinger Archive items from their text metadata.
Jev Cookbooks#community#typescript#demo
CommunityAlbionaHoti/refgardenTypeScript
Jev Capability Atlas
28GitHub stars
A bilingual field map of where Jev fits and where it fails, separating the author's raw API suites from cited third-party results and TypeSafe's own claims.
Jev Practices & Patterns#community#python#evaluation
CommunityZaious/jev-capability-atlasPython
JEVfire
75GitHub stars
An independent CUDA and vLLM take on parallel typed decisions: it scores verified single-token labels with the model's own head and assembles JSON in code.
Jev Practices & Patterns#community#python#javascript
Communitykikoncuo/jevfireJavaScript
jevframe
21GitHub stars
A Python library that adds .jev accessors to pandas and Polars: ask a natural-language question per row and get labels, scores, and full probability distributions back.
Jev Repos & SDKs#community#python#data
Communityktaletsk/jevframePython
Hermes Jev Approvals
20GitHub stars
A Hermes Agent plugin that replaces the auxiliary approval reviewer with TypeSafe's Jev decision model: one request asks six typed questions and deterministic code returns APPROVE, DENY, or ESCALATE.
Jev Tools & CLIs#community#python#agents
Communityanpicasso/hermes-jev-approvalsPython
TypeSafe Experiments
15GitHub stars
Interactive browser experiments that expose Jev's judgments: a support-message Decision Lab and a driving simulation where structured sensor state becomes typed steer, brake, and overtake decisions.
Jev Cookbooks#community#javascript#demo
Communitykavehmz/typesafe-playgroundJavaScript
OMP Jev Compaction
12GitHub stars
An omp plugin that does verbatim Jev-scored context reduction: stale tool calls and results are truncated to a short head plus a recoverable note, while sticky rewrites keep the provider's prompt cache intact.
Jev Tools & CLIs#community#typescript#compaction
Communityjerryfane/omp-jev-compactionTypeScript
Jev Agent Browser
13GitHub stars
Delegated browser execution for parent agents: Jev picks one bounded typed action from the current page snapshot, agent-browser performs it, and ambiguous or stuck flows escalate back to the parent.
Jev Tools & CLIs#community#javascript#browser
Communityforvela/jev-agent-browserJavaScript
HEIST//ONE
8GitHub stars
An observable stealth game where Jev supplies guards' split-second judgments while deterministic code owns the 30 Hz simulation, validates every proposal, and exposes each decision in a Decision Lens.
Jev Cookbooks#community#typescript#games
CommunityAbdelStark/heist-oneTypeScript
poorjev
10GitHub stars
An open, local-first alternative to Jev that reproduces the Choice, Score, and Noul interface on commodity zero-shot NLI models with temperature scaling and conformal abstention, and runs offline with no API key.
Jev Practices & Patterns#community#python#calibration
Communityrupeshpoojary9/poorjevPython
DiffJury
7GitHub stars
A Next.js app that fetches a public GitHub pull request's dossier and runs one Jev systemOne judgment, returning risk scores, noul probabilities, review depth, and an approve, request-changes, or block verdict.
Jev Tools & CLIs#community#typescript#classification
Communityraihankhan-rk/diffjuryTypeScript
Jev Auto Router
8GitHub stars
An experimental Codex CLI router where a local Responses proxy asks Jev one Choice per model call to select a host-available model and reasoning effort, while application-owned acceptance decides whether the task passed.
Jev Tools & CLIs#community#typescript#codex
CommunityminiLV/Jev-Auto-RouterTypeScript
JevSQL
5GitHub stars
A zero-dependency Node library and CLI that adds Jev natural-language predicates and decision tables to SQLite, with batching, caching, review queues, and saved decisions queryable as ordinary SQL tables.
Jev Tools & CLIs#community#javascript#sql
CommunityEugeneBoondock/jevsqlJavaScript
Jev on Workers AI
Cloudflare Workers AI's model page for typesafe/jev: run the structured evaluation model through an env.AI.run binding or the REST /ai/run endpoint, with typed Noul, Choice, and Score questions and worked examples.
Jev Tools & CLIsDocs#community#cloudflare#integration
Community
TypeSafe Provider
@ai-sdk/typesafe-ai adds an evaluation model to the Vercel AI SDK: one experimental_evaluate call sends a state with choice, score, and boolean questions and returns typed answers, probabilities, confidence, and usage.
Jev Tools & CLIsDocs#community#vercel#integration
Community
OpenRouter Labs: Prompt to questions
An OpenRouter Labs recipe that has Claude rewrite a pasted prompt into Jev questions, then runs Jev on every row while a chat model races the same job, comparing answers, requests, time, cost, and accuracy.
Jev CookbooksPlayground#community#openrouter#playground
Community

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.