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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 3073–3120 of 3904 resources

jev-compaction
3GitHub stars
Compacts Hermes transcripts by scoring every tool call with Jev: stale calls are dropped, stale results truncated, and protected tools such as write_file and patch are always kept. Nothing is ever summarised.
Jev Agents & MCP#community#jevbest#catalog-import
Communitypicaye/jev-compactionJavaScript
jev-plugins
0GitHub stars
An index and Cursor marketplace for four JEV Labs routers: memory_select filters retrieved memories under a token budget, agent_route picks or abstains, model_route routes an LLM, and mcp_select picks MCP tools without executing them.
Jev Agents & MCP#community#jevbest#catalog-import
CommunityPinutss/jev-plugins
jev-builder-loop
3GitHub stars
A Grok skill where you write the questions and environment state, Jev returns typed probabilities, and the script mixes them with your priors into posteriors before you act. Ships a nine-case benchmark you can run without a key.
Jev Agents & MCP#community#jevbest#catalog-import
Communityrainbowpuffpuff/jev-builder-loopPython
typesafe-jev-examples
1GitHub stars
Two worked Jev examples you can run today through OpenRouter without an early-access key: seven-question ticket triage batched into one request, and a re-ranker that fans one question out per candidate and sorts on the returned probability.
Jev Demos & Experiments#community#jevbest#catalog-import
Communityrajivkuriakose/typesafe-jev-examplesPython
cyber-breach-jev
0GitHub stars
A Three.js infinite-grid Tron arena shooter where Jev drives three systems: enemy combat choices and threat scores, a director picking encounters and pacing, and a P-key autopilot running 5-10 decisions per second. Ships with a local engine.
Jev Demos & Experiments#community#jevbest#catalog-import
Communityrchovatiya88/cyber-breach-jevJavaScript
jev-trader
0GitHub stars
Real-time market analysis where a local Node bridge calls Jev through the Vercel AI Gateway: headline sentiment, plus buy, sell or hold bias with strength and conviction for an FX, metals, energy, rates and crypto basket fed from MetaTrader5, with a local dashboard.
Jev Tools & CLIs#community#jevbest#catalog-import
Communityrenatosousa/jev-traderPython
agent-gate-loop
0GitHub stars
A GitHub Action that turns a labelled issue into a pull request, with a four-part gate before a human sees it: path and test guards, your own check commands, a read-only Claude reviewer, and Jev checking each finding plus whether the change does what the issue asked.
Jev Agents & MCP#community#jevbest#catalog-import
CommunityRipwords/agent-gate-loopTypeScript
JevArena
0GitHub stars
A Next.js spectator app where two independent Jev agents play Snake against each other, each spectator page running its own match. Jev is reached only through Vercel AI Gateway, and an empty key gives you a labelled demo-policy match instead.
Jev Demos & Experiments#community#jevbest#catalog-import
Communityrolki-png/JevArenaTypeScript
jev-retrieval
6GitHub stars
A Rust CLI that finds files and line ranges with two ingredients: a stateless in-memory BM25 pass for recall and Jev calibrated judgments for precision. No embeddings, no vector database, no index directory, no repository state.
Jev Agents & MCP#community#jevbest#catalog-import
Communityromeromarcelo/jev-retrievalRust
pong-jev
0GitHub stars
Atari Pong where Jev answers one question per frame - which way should the paddle move, up, down or stay - while all arithmetic stays in code and the model is sent five short phrases. Includes a local court to duel it on.
Jev Demos & Experiments#community#jevbest#catalog-import
Communitysafzanpirani/pong-jevTypeScript
jev-games
2GitHub stars
A visual lab where Jev plays Mario, Kung Fu and Doom, with a plugin split so new games and emulators do not require rewriting the loop. Code owns buttons, hold duration and Mario landing interrupts; Step and Scripted keep the API bill down.
Jev Demos & Experiments#community#jevbest#catalog-import
Communityshantanugoel/jev-gamesPython
Search-Function-Test
0GitHub stars
Four commits on a vercel-deploy branch holding four HTR-questions JSON shards and an htr-hero directory — a test of asking a blog's articles as chat, with no build manifest at the root and no README.
Jev Demos & Experiments#community#jevbest#catalog-import
CommunityShifros/Search-Function-TestJavaScript
typesafe-triage-guard
0GitHub stars
Three composable Jev judgment pipelines at roughly 120 lines of composition logic each: support-ticket triage behind a safety guardrail, observability alert triage with dedupe and auto-page decisions, and a deploy risk gate over PR diffs.
Jev Tools & CLIs#community#jevbest#catalog-import
Communityshivam2003-dev/typesafe-triage-guardPython
typesafe-go
0GitHub stars
Unofficial, dependency-free Go client for TypeSafe's System One API. Calls Jev with Noul, Choice and Score questions in one request, returns typed answers and a typed error ladder, and mirrors the official Python and JavaScript SDKs' retry policy.
Jev Repos & SDKs#community#jevbest#catalog-import
CommunityShubham510/typesafe-goGo
scam-shield
0GitHub stars
Checks a text message for scam signals and turns them into an explainable verdict: code extracts link and sender signals, one parallel Jev call answers eleven typed questions, and a pure policy function weights them into a risk score.
Jev Tools & CLIs#community#jevbest#catalog-import
CommunityShupingR/scam-shieldTypeScript
jev-jp-address
1GitHub stars
CLI that normalizes messy Japanese addresses to postal codes using Japan Post KEN_ALL and JIGYOSYO master data, asking Jev only for the steps rules and lookups cannot settle, and printing the probability behind each decision.
Jev Practices & Patterns#community#jevbest#catalog-import
Communitysmasato/jev-jp-addressTypeScript
Jev4Mellea
3GitHub stars
Python adapter that puts Jev's Noul, Choice and Score checks inside Mellea generation flows: verify a requirement, classify text into caller-defined categories, or rate it on an ordered scale, each attachable as a Mellea Requirement.
Jev Integrations & Adapters#community#jevbest#catalog-import
CommunitySoundBlaster/Jev4MelleaPython
trading-bot-jev
3GitHub stars
Medium-term crypto trend-following bot that uses Jev to read and sort crypto, political, central bank, regulator and exchange news, then applies the result as a small news bias and a regulatory veto on a 4-hour EMA strategy.
Jev Tools & CLIs#community#jevbest#catalog-import
CommunitySpykoninho/trading-bot-jevTypeScript
omp-jevens-classifier
0GitHub stars
OMP plugin that judges bash commands and process-spawning eval payloads with Jev before they run, adding a real permission prompt in yolo mode while leaving your existing deny, prompt and narrow allow rules untouched.
Jev Agents & MCP#community#jevbest#catalog-import
CommunitySTRML/omp-jevens-classifierTypeScript
jev-trace-classifier
0GitHub stars
Study of whether a calibrated judgment primitive can tell agent-written wiki pages from human ones, using the collusion.wiki corpus, Jev's Noul against a local Qwen, and a threshold sweep that finds no separating cutoff.
Jev Practices & Patterns#community#jevbest#catalog-import
Communitysypherin/jev-trace-classifierPython
terrarium
0GitHub stars
Sandbox where a small creature's controls are chosen by Jev while the code runs the world: one request per step, a Choice over eleven controls plus a per-object fan-out, and a decision log with every probability and every overruled judgment.
Jev Demos & Experiments#community#jevbest#catalog-import
CommunityTheGali/terrariumJavaScript
jev-review
1GitHub stars
Autonomous PR review bot that consumes PR metadata and patches, asks Jev a finite set of typed questions across correctness, security and verification perspectives, then applies deterministic gates in code. Suggestions are advisory; it never edits or merges.
Jev Agents & MCP#community#jevbest#catalog-import
Communitythiago-ss/jev-reviewPython
FinancialPredictionJev
0GitHub stars
A single untitled Python file, one commit, no stars: an attempt to see how well Jev predicts financial markets, in a repository whose own description concedes that it does not do that well.
Jev Practices & Patterns#community#jevbest#catalog-import
Communitythodoh1/FinancialPredictionJevPython
typesafe-chess
10GitHub stars
Two Jev players playing chess with no engine: code owns the rules and the tactical facts, and the model returns one Choice per legal move with a probability for each, plus a Score for the position and a Noul for sharpness.
Jev Demos & Experiments#community#jevbest#catalog-import
CommunityTholeG/typesafe-chessJavaScript
tinyjevclient
0GitHub stars
Typed Rust client for TypeSafe's System One API that sends shared state with independent Choice, Score and Noul questions, validates the provider's response against the originating request, and returns latency, attempts and usage with the answers.
Jev Repos & SDKs#community#jevbest#catalog-import
Communitytinyhumansai/tinyjevclientRust
JevSlop
4GitHub stars
A bring-your-own-key tool that pastes a public note.com article URL and returns Jev's whole-article writing-quality judgment plus eight detail signals as an AI Slop Score. Cloudflare Pages deploy, MIT licensed, explicitly not an authorship detector.
Jev Tools & CLIs#community#jevbest#catalog-import
CommunityTKY-27/JevSlopTypeScript
shady-town
0GitHub stars
Social-deduction party game where the TV moderates: humans play on their phones, and one fast structured Jev judgment per round turns game state into per-player suspicion meters, with decisions and thresholds left in code.
Jev Demos & Experiments#community#jevbest#catalog-import
Communitytpaulshippy/shady-townRuby
jev-pick-and-place-study
1GitHub stars
A MuJoCo pick-and-place pilot that runs Jev, Claude Haiku and hand-written reactive rules through the same episodes and publishes the comparison, including the parts that did not flatter Jev.
Jev Practices & Patterns#community#jevbest#catalog-import
Communitytryaksh/jev-pick-and-place-studyPython
pi-typesafe
0GitHub stars
A Pi extension that runs four hazard checks before bash, write and edit and four diff-quality checks afterwards, sharing one System One request per phase and applying its own thresholds.
Jev Agents & MCP#community#jevbest#catalog-import
Communitytwilwa/pi-typesafeTypeScript
sift
0GitHub stars
Chrome extension that re-ranks Google results with TypeSafe Jev: five atomic questions per result, a weighted score, sales pages flagged and hidden, and a button to restore Google's order.
Jev Demos & Experiments#community#jevbest#catalog-import
Communitytylergibbs1/siftTypeScript
typesafe_ai
0GitHub stars
Unofficial typed Elixir client for the TypeSafe System One API: typed question structs in, typed answer structs out, atom-keyed answers, concurrent fan-out over many states and offline test stubs.
Jev Repos & SDKs#community#jevbest#catalog-import
Communitytypesend/typesafe_aiElixir
hermes-jev-router
1GitHub stars
Experimental Hermes plugin that asks Jev to label task complexity, then deterministic policy code picks the cheapest eligible allowed model and returns a routing plan. It does not dispatch the request.
Jev Agents & MCP#community#jevbest#catalog-import
Communityussyverse/hermes-jev-routerPython
typesafe-sdk-go
0GitHub stars
Unofficial Go client for the TypeSafe System One API, aiming for 1:1 parity with the official JavaScript and Python SDKs: typed Noul, Choice and Score, status-specific errors, and an injectable http.Client.
Jev Repos & SDKs#community#jevbest#catalog-import
Communityvalksor/typesafe-sdk-goGo
typesafe-sdk-php
0GitHub stars
Unofficial PHP client for the TypeSafe System One API: strictly typed, zero framework dependencies, a cURL transport you can swap, and optional ResponseModel classes that decode answers into your own objects.
Jev Repos & SDKs#community#jevbest#catalog-import
Communityvalksor/typesafe-sdk-phpPHP
thaiexam-jev-charts
0GitHub stars
Static chart pages comparing Jev against 110 other language models on Thai standardized exams: cost and speed plotted against accuracy, plus a page on whether its stated confidence predicts correctness.
Jev Practices & Patterns#community#jevbest#catalog-import
Communityvehas/thaiexam-jev-chartsHTML
siege
2GitHub stars
SIEGE puts a live support agent with seven real tools in front of 200 attackers; every proposed call passes a TypeSafe System One action gate, and a defender loop rewrites the gate from each breach it observes.
Jev Demos & Experiments#community#jevbest#catalog-import
Communityvnmoorthy/siegeTypeScript
jev-agent-kit
2GitHub stars
jevkit is a single dependency-free Node binary exposing eleven Jev-backed decisions as both shell commands and MCP tools, including guard for gating an action, plus route, triage and semantic grep over log files.
Jev Agents & MCP#community#jevbest#catalog-import
Communitywalidboulanouar/jev-agent-kitJavaScript
jev-board-lab
0GitHub stars
Browser-first workbench that turns selected CSV rows into Jev judgments: up to 20 Noul, Choice and Score questions per row, with the file parsed in memory and requests proxied through a Cloudflare Worker.
Jev Demos & Experiments#community#jevbest#catalog-import
CommunityWebGrga/jev-board-labJavaScript
Jev-test
0GitHub stars
A TypeScript CLI and Fastify service that puts three questions about an occupation to Jev in one request - layoff risk, trajectory and human accountability - and derives a resilience score in app code.
Jev Demos & Experiments#community#jevbest#catalog-import
CommunityWeSecureYou/Jev-testTypeScript
jev-evaluation
0GitHub stars
A pre-registered adversarial evaluation of jev: nine experiments, 28 predictions fixed before any request was sent, and a report plus prompting guide regenerated from the measured logs.
Jev Practices & Patterns#community#jevbest#catalog-import
Communitywillkelly/jev-evaluationPython
typesafe-image-diffusion
0GitHub stars
A FastAPI app that turns a text prompt into 16x16 pixel art by asking Jev 256 parallel Choice questions, one per pixel over a 16-colour palette, then refining the grid.
Jev Demos & Experiments#community#jevbest#catalog-import
CommunityWizhill05/typesafe-image-diffusionHTML
jev-playground
2GitHub stars
A Vite app where Jev picks only closed-enum labels for a composition plan and code expands those into notes, engraving, audio and MIDI, with an offline heuristic stub when no key is set.
Jev Demos & Experiments#community#jevbest#catalog-import
Communitywustep/jev-playgroundTypeScript
Agent-JEV-Tetris
2GitHub stars
Tetris where Jev picks every move from the seven legal options, but the game pre-computes landings, holes, roughness and a best plan so the model only ever judges outcomes.
Jev Demos & Experiments#community#jevbest#catalog-import
CommunityYasserbhb/Agent-JEV-TetrisHTML
github-star-organizer-jev
1GitHub stars
A Python CLI that sorts GitHub stars into your existing GitHub Lists using README excerpts and repo metadata, writes a JSON classification report, and applies it only when you ask.
Jev Tools & CLIs#community#jevbest#catalog-import
Communityyutkat/github-star-organizer-jevPython
zcode-jev
0GitHub stars
A provider-agnostic TypeScript judgment layer for coding agents, with gates from PRD intake through release, a pluggable judge backend and a decision log you can replay.
Jev Agents & MCP#community#jevbest#catalog-import
CommunityZahrannnn/zcode-jevTypeScript
ground-zero
0GitHub stars
An alpha Python library that uses Jev to grade model responses for hallucination, correctness and instruction following, returning Noul probabilities and five-level severity Scores.
Jev Integrations & Adapters#community#jevbest#catalog-import
Communityzavocc/ground-zeroPython
jev-plays-pokemon
1GitHub stars
A Pokemon Red agent that boots a ROM, picks each move with Jev, and streams video plus a live decision panel from a small read-only local HTTP server.
Jev Demos & Experiments#community#jevbest#catalog-import
Communityzbloss/jev-plays-pokemonPython
agent-handoff-gate
0GitHub stars
An experimental specification and offline evaluation kit for delegated coding work: evidence schemas, a gate protocol for PASS and BLOCKED reports, and a Jev integration contract.
Jev Agents & MCP#community#jevbest#catalog-import
CommunityzsoXi/agent-handoff-gatePython

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.