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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 1249–1296 of 3919 resources

jev-tool-search
2GitHub stars
A benchmark comparing BM25, embeddings, rerankers and Jev for tool search over 525 real MCP tools and 94 annotated tasks, plus an experimental Jev search engine. Jev's two-stage search found the right tool first 56% of the time.
Jev Benchmarks & Evaluations#community#catalog-import#logicrw
Communitykachar/jev-tool-searchTypeScript
Jev Clean
2GitHub stars
Decision-first CSV cleaning: local code builds bounded repair candidates, Jev returns action, applicability and semantic-risk distributions, and a fixed policy decides what may be applied — or abstains. The model never writes repairs or mutates the source CSV.
Jev Tools & CLIs#community#catalog-import#logicrw
Communitykunyanli230/jev-cleanPython
Model Kombat
2GitHub stars
A 12,000-neuron fly-brain subgraph of the maleCNS connectome fights Jev in mk.js: the fly simulates spikes in the browser at 10 decisions per second while Jev reads the fight as JSON and answers one typed choice among seven moves.
Jev Demos & Experiments#community#catalog-import#logicrw
Communitylavallee/mk-jev-fly-brainJavaScript
Jev MCP Server
2GitHub stars
An MCP server that gives Codex, Claude and other clients two tools for typed decisions: jev_evaluate mixes noul, choice and score questions in one call, and jev_classify batches up to 100 items against defined classes with review thresholds.
Jev Agents & MCP#community#catalog-import#logicrw
Communitymattioofr/mcp-server-jevJavaScript
jev-tool-runner
2GitHub stars
A Jev-native router for Codex: before the coding model is invoked, Jev picks a native tool call from a small set of bounded reads, and Codex executes it through its own runtime and sandbox, keeping the result in the conversation.
Jev Integrations & Adapters#community#catalog-import#madewithjev
Communitymicic-mihajlo/jev-tool-runnerJavaScript
jev-experiments
2GitHub stars
Two TypeSafe System One game loops in one Python repo: Dino-Jev drives Chrome's chrome://dino/ dinosaur and Krunker-Jev runs a local Krunker-style arena, both feeding structured state to Jev and logging decisions.
Jev Demos & Experiments#community#catalog-import#logicrw
Communitymittal-parth/jev-experimentsPython
JevSpeak
2GitHub stars
JevSpeak explores whether a model that cannot generate text can still talk: about 13 parallel Jev decisions per turn become a typed Semantic IR that a deterministic compiler renders in English or Chinese. Live at jevspeak.org.
Jev Demos & Experiments#community#catalog-import#logicrw
Communitymm-sheng/jevspeakTypeScript
voicevox-jev-proxy
2GitHub stars
A Python tool that asks TypeSafe Jev to fix Japanese readings in VOICEVOX: Sudachi splits sentences, Jev answers reading and phrase-boundary questions, and output comes as corrected WAV files or a VOICEVOX-compatible API server.
Jev Integrations & Adapters#community#catalog-import#logicrw
Communitynemalabs/voicevox-jev-proxyPython
Jev Doom
2GitHub stars
Watch Jev play Freedoom in a local dashboard: structured engine observations go in, typed decisions come out, and the UI shows the game, choices, probabilities, navigation, latency and cost under a $15 default cap.
Jev Demos & Experiments#community#catalog-import#logicrw
Communityolivier-motium/jev-doomPython
Jevable
2GitHub stars
A bash-native CLI from Parall that gives an agent Jev as an atomic tool: pipe any event stream through a plain-English question and it prints only the lines that pass, composing with the tools your agent already pipes.
Jev Tools & CLIs#community#catalog-import#madewithjev
Communityparall-hq/jevableTypeScript
jev-cc-codex-router
2GitHub stars
A single-file Python proxy that asks Jev which of four model tiers each new Codex turn needs — luna, terra, sol or astra — rewrites the model field, and retries flaky upstream errors.
Jev Integrations & Adapters#community#catalog-import#logicrw
Communitypeterwanghot/jev-cc-codex-routerPython
Codex Decision
2GitHub stars
A local Codex extension that filters repetitive lines from supported tool output with OpenAI Decisions by default or TypeSafe Jev optionally, keeping errors visible and linking every shortened result to the full original.
Jev Integrations & Adapters#community#catalog-import#logicrw
Communityphilippelhaus/codex-jevRust
north-star
2GitHub stars
A Hermes Agent skill that turns an intention into a written finish line: machine-checkable requirements run as shell commands, fuzzy ones go to Jev for calibrated probabilities, and exit 1 names the weakest unmet requirement.
Jev Agents & MCP#community#catalog-import#logicrw
Communitypoponline63/hermes-jev-north-starPython
local-jev
2GitHub stars
A 100% offline, zero-cost Rust drop-in for the TypeSafe Jev System One API: one native binary serves Choice, Score, Noul and Route decisions on CPU in under 18 ms with no API keys, cloud egress or rate limits.
Jev Repos & SDKs#community#catalog-import#madewithjev
Communityronitgupta138/local-jevRust
jev-msw
2GitHub stars
Contract-aware MSW handlers for the official @typesafe-ai/sdk: mock Jev choices, Nouls and scores in tests without API calls, credentials, latency or credits, while the real SDK parsing and retry logic still runs.
Jev Repos & SDKs#community#catalog-import#logicrw
Communityroyalpinto007/jev-mswTypeScript
jevcheck
2GitHub stars
pytest-style behavioral contracts for Jev: pin a production contract of baseline model plus fixtures, eval a candidate model against it, and fail the upgrade when answers flip or confidence regresses.
Jev Benchmarks & Evaluations#community#catalog-import#logicrw
Communitysathariels/jevcheckPython
JevGuard MCP Server
2GitHub stars
Official MCP server for JevGuard and TypeSafe AI: zero-dependency guardrails over JSON-RPC 2.0 on stdio, gating shell commands and code patches, caching decisions in local SQLite and pruning state.
Jev Agents & MCP#community#catalog-import#cobanov
Communityseb4ez/jevguard-mcpPython
claude-jev-funnel
2GitHub stars
A Claude Code plugin and zero-dependency Python CLI that judges items in bulk with calibrated Jev answers, resolves the confident ends in code, and sends only the uncertain band to Claude or a human.
Jev Agents & MCP#community#catalog-import#logicrw
Communityshakibuzzaman3104/claude-jev-funnelPython
Jev + Herdr: Practical AI Agent Orchestration
3GitHub stars
A public guide to orchestrating coding agents with TypeSafe Jev and Herdr: Jev routes tasks and scores risk, coordinator code owns policy and thresholds, Herdr runs workspaces, and agents execute bounded tasks.
Jev Guides & Articles#community#catalog-import#logicrw
Communitysherajdev/jev-researchTypeScript
JeVerifier
2GitHub stars
Runs cheap Jev checks beside a Claude coding session: code rule lint against project rules, doc consistency checks, and context retrieval, re-checking only changed code and recording every verdict so it is not paid for twice.
Jev Tools & CLIs#community#catalog-import#logicrw
Communitysilvariasereneblossom/jeverifierPython
jev_dart
2GitHub stars
Pure Dart client for the TypeSafe System One API, usable from a CLI, a server or a Flutter app. The request path avoids extra copies and reuses HTTP/2 connections, and no comparative benchmarks are published.
Jev Repos & SDKs#community#catalog-import#logicrw
Communitysolido/jev_dartDart
let-jev-speak
2GitHub stars
Coaxes free text out of TypeSafe's classification endpoint by decoding one word at a time: every word is a separate choice question over a vocabulary, and the loop feeds its output back as the prefix. The README itself calls the approach a demonstration, not a good idea.
Jev Demos & Experiments#community#catalog-import#logicrw
Communitysuidouble/let-jev-speakJavaScript
Jevault
2GitHub stars
Obsidian desktop plugin that suggests destination folders for the active Markdown note using only folders that already exist in the vault, plus existing tags with match probabilities. It never moves notes automatically: you select a suggestion and confirm.
Jev Tools & CLIs#community#catalog-import#logicrw
Communitytaichocop/jevaultTypeScript
TypeEvacSafe
2GitHub stars
Fire-evacuation simulation where every occupant gets a Jev-style typed decision engine: a local Ternary Bonsai 2 27B, Qwen3.5-4B or the TypeSafe Jev API reads choice probabilities, while movement runs on validated social-force physics.
Jev Demos & Experiments#community#catalog-import#madewithjev
Communityusing76/typeevacsafePython
Jev Browser Skill
2GitHub stars
Codex Agent Skill that hands continuous browser work to Jev: one sentence starts a task, Jev picks the actions and targets, and Codex replies once the run completes. Reuses your own Chrome and reads the DOM instead of screenshots.
Jev Agents & MCP#community#catalog-import#logicrw
Communitywanghai673/jev-browser-skillPython
VideoAdGuard Jev
2GitHub stars
Chrome extension that detects sponsored segments in Bilibili videos with TypeSafe Jev and skips them only when confidence passes conservative checks. A fork of ZeroTang05/VideoAdGuard, analyzing subtitles or Groq transcripts.
Jev Tools & CLIs#community#catalog-import#logicrw
Communityxianggelila177/videoadguard-jevTypeScript
ego-jev
2GitHub stars
Agent skill that pairs Ego Lite's Chromium control with Jev's semantic judgment: the agent keeps the plan, Ego Lite drives the browser, and Jev resolves choices like which observed link actually matches the intent. Exact work stays in local code.
Jev Agents & MCP#community#catalog-import#logicrw
Communityzhuboer/ego-jevJavaScript
JEV Stock Decision Maker
1GitHub stars
Streamlit demo that turns live market data into structured investment decisions with TypeSafe Jev: yfinance supplies prices and fundamentals, then a 20-question model scores buy/sell conviction, financial health and risk.
Jev Demos & Experiments#community#catalog-import#logicrw
Community0xzee/jev-stock-decision-makerPython
jev-eval
1GitHub stars
Benchmark harness that scores TypeSafe Jev against any OpenRouter model or local checkpoint on labelled classification data: accuracy, calibration (ECE), confidence distribution, latency and cost across five tasks with 300 items each.
Jev Benchmarks & Evaluations#community#catalog-import#cobanov
Community4esv/jev-evalPython
Jev Pre-flight Gate
1GitHub stars
UserPromptSubmit hook for WorkBuddy (and a pre_llm_call shell hook for Hermes Agent) that has Jev judge every prompt in about a second and inject the verdict as routing hints, aiming to cut main-model tool calls and turnarounds.
Jev Integrations & Adapters#community#catalog-import#logicrw
Communityadamwdff/jev-gatePython
JevDrive
1GitHub stars
Research prototype that tests where Jev can help a driving policy choose continue, observe, replan or defer: Jev receives structured text, a separate vision model handles camera images, and a local controller owns vehicle execution.
Jev Demos & Experiments#community#catalog-import#logicrw
Communityalpha-harper-franklin/jev-drivePython
Jevscript
1GitHub stars
A programming language where judgment is a runtime primitive: programs ask Jev narrow typed questions (noul, choice, score) as they run, and the Hocket engine coalesces judgments so two asks over one state become a single API request.
Jev Tools & CLIs#community#catalog-import#logicrw
Communityamberwhitehead/jevscriptJavaScript
Decima
1GitHub stars
Open, CPU-sized Jev-style decision model: give it a situation, a question and options, and Decima returns calibrated probabilities in roughly 20-50 ms per decision as int8 ONNX, with no GPU, no API key and nothing leaving the machine.
Jev Models & Reimplementations#community#catalog-import#cobanov
Communityamyrmahdy/decimaPython
PRAXEON
1GitHub stars
Runtime supervision middleware for autonomous agents, published as andreuvm/jev-reasoning-navigator: no model-proposed action executes directly, and a deterministic runtime verifies preconditions, evaluates risk and submits actions to calibrated semantic judgment.
Jev Agents & MCP#community#catalog-import#logicrw
Communityandreuvm/jev-reasoning-navigatorPython
hermes-typesafe-jev
1GitHub stars
Documentation hub for wiring Jev into Hermes Agent, Nous Research's autonomous agent framework: Choice, Noul and Score arrive as MCP-style tools, with context curation, turn admission and receipt-backed verification described end to end.
Jev Agents & MCP#community#catalog-import#madewithjev
Communityandyholst/hermes-typesafe-jev
Jevatar
1GitHub stars
An AI companion that replies only with facial expressions: Jev judges each message and picks one of 16 moods while blobatar morphs its face, with no text replies and no visible chat history.
Jev Demos & Experiments#community#catalog-import#logicrw
Communityappchainai/jevatarTypeScript
JEV Decision Benchmarks
1GitHub stars
Benchmark results for JEV 1.13 in Choice mode across MetaTool, When2Call and BFCL V4: tool selection, abstention and hallucination tables with bilingual reports and CSV data.
Jev Benchmarks & Evaluations#community#catalog-import#cobanov
Communitybaibizhe/jev-decision-benchmarksPython
Jev MCP for Cloudflare
1GitHub stars
A self-hosted MCP gateway on Cloudflare Workers that wraps the TypeSafe/Jev System One model into nine judgment tools for intent routing, retrieval reranking and batch semantic work, with a D1-backed admin console.
Jev Agents & MCP#community#catalog-import#logicrw
Communitybaize7815/jev-mcp-open-sourceTypeScript
Jev Eye
1GitHub stars
An ultra-lean supervisor extension for the pi coding agent: zero-token regex guardrails stop destructive commands, a done-check tracks test verification, and a Jev semantic gate reviews diffs before disk writes.
Jev Tools & CLIs#community#catalog-import#logicrw
Communitybismawy/pi-jev-eyeTypeScript
Jev Home Assistant Sentinel
1GitHub stars
A Home Assistant integration that turns AI device decisions into a safety boundary: a bounded case goes to Jev, a deterministic policy check runs, and state verification is recorded separately from the command result.
Jev Integrations & Adapters#community#catalog-import#logicrw
Communitybojansandhaus/jev-home-assistant-sentinelPython
Jev for Google Sheets
1GitHub stars
A Google Sheets add-on that classifies, tags and scores text with plain-language formulas: JEV_IF, JEV_PROB, JEV_CHOICE and JEV_SCORE return typed values, and uncertain rows can say UNSURE instead of guessing.
Jev Integrations & Adapters#community#catalog-import#cobanov
Communitycab14bacc/jev-sheetsTypeScript
Dex
1GitHub stars
An open-source, Jev-compatible System One model: Dex answers choice, score and yes/no questions over text in a single forward pass from an Ettin-1B encoder, and speaks the same /v1/systemone shape as Jev.
Jev Models & Reimplementations#community#catalog-import#madewithjev
Communitycanadaornaw/dexPython
Hunch
1GitHub stars
Probabilistic control flow for TypeScript: Hunch asks a System One model such as Jev yes/no questions, thresholded booleans, picks and ratings, and returns typed answers you can branch on in ordinary code.
Jev Repos & SDKs#community#catalog-import#cobanov
Communitycarldaws/hunch-tsTypeScript
jev-triage
1GitHub stars
Classifies failing test output as RETRY, FIX_CODE or FIX_ENV in one Jev call after offline parsing and deterministic rules, usable as a CLI, a Python library or a Claude Code PostToolUse hook.
Jev Tools & CLIs#community#catalog-import#logicrw
Communityccai40359-wq/jev-triagePython
jev-oxlint
1GitHub stars
A toolkit that turns an agent skill into a project-specific Oxlint plugin: deterministic AST checks handle structural rules while Jev answers the narrow typed questions that need contextual judgment.
Jev Tools & CLIs#community#catalog-import#madewithjev
Communitycephalization/jev-oxlintTypeScript
jev-test
1GitHub stars
A concept prototype that marks NZQA-style assessment scripts from rubric criteria alone: one Jev call per script returns guardrails, criterion scores and an overall grade, and confidence triages the work.
Jev Demos & Experiments#community#catalog-import#logicrw
Communitycgbarlow/jev-testJavaScript
jev-testbench
1GitHub stars
A lightweight, auditable testbench for Jev as a typed decision primitive: every real API call appends to an append-only log, evidence is frozen under SHA-256 hashes, and the headline result is a preregistered negative.
Jev Benchmarks & Evaluations#community#catalog-import#logicrw
Communitycharlie-wang-03/jev-testbenchPython
claude-jev-mod
1GitHub stars
A Claude Code mod that adds $.jev to the engine interface, letting plugin hooks ask Jev for Choice, Score and Noul answers over one state via TypeSafe, OpenRouter, Vercel, Cloudflare, LiteLLM or a custom endpoint.
Jev Integrations & Adapters#community#catalog-import#logicrw
Communitychrishan17/claude-jev-modTypeScript

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.