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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 673–720 of 3919 resources

Coding Router Jev
2GitHub stars
A TypeScript/Bun launcher that routes coding-agent user turns through JEV, the TypeSafe classifier, with model and reasoning-effort selection: codex-jev wraps the Codex CLI, claude-jev wraps Claude Code, and a Pi extension adds a jev/auto virtual model.
Jev Tools & CLIs#community#github#cli
Communityguanghuang/coding-router-jevTypeScript
Gemini + Jev Bridge for Codex
2GitHub stars
A local MCP server that lets Codex delegate routine drafting, analysis and code proposals to Gemini while TypeSafe Jev reviews each draft against explicit criteria; Gemini runs on included Google AI Pro quota and Jev needs its own TypeSafe account.
Jev Agents & MCP#community#github#mcp
Communityhelikirmi2/codex-gemini-jev-bridgeJavaScript
Inbox Jev
2GitHub stars
Gmail triage with TypeSafe Jev: every few minutes it reads new inbox mail, asks Jev for a category with calibrated confidence, then labels, archives, unsubscribes from verified marketing or cold outreach, and moves scams to Spam.
Jev Tools & CLIs#community#github#gmail
Communityhellolitebox/litebox-inbox-jevPython
jevmem
2GitHub stars
Long-term memory for AI agents whose reads and writes are driven by Jev's typed, probabilistic decisions instead of a generative LLM in the loop, inspired by the Jev-Mem paper and shipped as an MCP server, Claude Code hooks, a CLI and a Python library.
Jev Agents & MCP#community#github#memory
Communityillescasdaniel/jev-memPython
Deep Jev Seek
2GitHub stars
A TypeScript project that wraps DeepSeek's FIM API or llama.cpp's Completion API into a Jev / TypeSafe SystemOne-style discrete decision interface, published on npm as @lenml/jevseek with a WebUI and Docker workflow.
Jev Integrations & Adapters#community#github#deepseek
Communitylenml/deep-jev-seekTypeScript
systemone-gridworld
2GitHub stars
A deterministic gridworld that benchmarks System One decision backends, typed calibrated decisions over a declared option set with one forward pass and no decoding, in a sequential loop, with a scripted oracle scoring agreement without labels.
Jev Benchmarks & Evaluations#community#github#benchmark
Communitylovelacemadeline/systemone-gridworldPython
ohmyjev
2GitHub stars
Jev, batteries included, for Claude Code, Codex, pi and omp: safe commands skip permission prompts, long output is trimmed, and destructive commands such as rm -rf or force push are stopped until you say yes.
Jev Tools & CLIs#community#github#claude-code
Communitynovacon/ohmyjevTypeScript
Choir
2GitHub stars
A Lumiverse Spindle extension for multi-voice roleplay TTS with fixed leads, LLM-cast NPCs, sound effects and ambience, where Jev attribution reads unspoken quotes with the narrator and names new speakers from the story.
Jev Integrations & Adapters#community#github#tts
Communitypatatasbravasch-arch/choirJavaScript
Awesome Clef
2GitHub stars
A community directory of projects, tools, SDKs, demos and resources built around Cloudflare Clef, the open-weight decision models that answer typed noul, choice and score questions with probabilities. Includes a searchable site at awesomeclef.com.
Jev Guides & Articles#community#github#awesome-list
Communityrohinrohin/awesome-clefJavaScript
Jev Meetup
2GitHub stars
Demo pack from the French-language Jev meetup of 8 October 2026 on System One models: a Chrome ad-blocker, an unclutter browser fork, a decision-routing kit comparing a local engine with Jev via OpenRouter, and n8n email triage.
Jev Demos & Experiments#community#github#demos
Communityroyam0820/Jev-MeetupJupyter Notebook
jevstice
2GitHub stars
An oh-my-pi extension that puts consequential agent decisions to Jev (jev-latest) through the TypeSafe API, checking visible actions and completion boundaries. Its ordinary-session entry is deliberately disabled: an MVP under verification, not a release.
Jev Tools & CLIs#community#github#pi
Communityveschin/jevsticeTypeScript
ClaudeRouter
2GitHub stars
A Claude Code mod that routes each request to haiku, sonnet or opus with a reasoning effort and confidence score using local heuristics, and can optionally let Jev (TypeSafe System One) pick the tier instead. Adds a live status band above the prompt.
Jev Tools & CLIs#community#github#claude-code
Communityvisualife/ClaudeRouterTypeScript
jeffort
2GitHub stars
A Claude Code mod that asks Jev (TypeSafe) how much effort each prompt needs and sends every request of that turn at that effort, never changing the main loop's model. Off by default; a fork of jjjjjjjjjjjjjjjjacob/jev-router.
Jev Tools & CLIs#community#github#claude-code
Communityvntrungld/jeffortTypeScript
Life Decision
2GitHub stars
A Chinese-language Next.js site that takes your situation and picks 3–5 fitting items from 671 suggestions in a life guide, ranked by Jev choice, noul and score questions with evidence grades, costs and sources shown.
Jev Tools & CLIs#community#github#nextjs
Communityzjl1985/life-decisionTypeScript
systemone
1GitHub stars
An open typed-decision layer with choice, score and noul questions, calibrated probabilities and one batched call, built as a numpy-only base with eight swappable engines. The README positions it as rebuilding Jev's closed API shape on hardware you control.
Jev Repos & SDKs#community#github#python
CommunityFranzferdinan51/SystemOnePython
system-one
1GitHub stars
A Claude skill that answers with decisions instead of paragraphs: given a state and typed questions it returns JSON with probabilities and confidence, a few dozen tokens, zero explanation, ready for code to threshold on.
Jev Agents & MCP#community#github#claude-skill
CommunityKathanModh259/system-one
Jev Mail
1GitHub stars
AI Gmail organizer for Chrome and Brave: it classifies every email with TypeSafe's Jev, auto-labels the inbox, and bulk-cleans junk with preview and undo. Uses your own OpenRouter or TypeSafe key, with no server involved.
Jev Tools & CLIs#community#github#gmail
CommunityKirtanUgreja/jev-mailJavaScript
Dernier Abri
1GitHub stars
A French 3D browser defense game used as a test bench for decisions under uncertainty: JEV (TypeSafe AI) estimates from a text description whether a silhouette is a zombie or a survivor, and deterministic code decides whether to shoot.
Jev Demos & Experiments#community#github#game
CommunityPablositoo/dernier-abriPython
Pi JEV Governor
1GitHub stars
A decision governance layer for the pi coding agent: planning, model routing, permission control and outcome validation through JEV. Claims up to 45% lower model cost on MATH-500 with no accuracy loss and P50 decision latency of 0.6–0.7 s.
Jev Tools & CLIs#community#github#pi
CommunityPyromind-Dynamics/pi-jev-governorTypeScript
Jev-systemOne-model
1GitHub stars
A GitHub repository whose only published description is its name: Jev-systemOne-model. It was created and pushed on 2026-09-29, has one star, and lists neither a language nor a license; the digest captured no README, so its contents cannot be verified.
Jev Repos & SDKs#community#github#unverified
CommunityRahulKumarsingh2001/Jev-systemOne-model
Ghost Bus
1GitHub stars
Finds Dublin buses that are scheduled, due, and just not there: it checks the GTFS timetable against the live vehicle feed and flags trips with no bus and no cancellation. Built in a day for Build for Ireland, live on open data and Jev.
Jev Demos & Experiments#community#github#transit
CommunityRajatgdev/Ghost_busPython
System One Native
1GitHub stars
A Python decision engine that runs Choice, Noul and Score questions on Gemini's free tier, Groq, OpenAI or a local Ollama server with local response validation. The README calls it a drop-in alternative to Jev and ships agent skill and plugin installs.
Jev Repos & SDKs#community#github#python
CommunityRodrigoAlbe/system-onePython
Evaluating Jev as a Prompt-Injection Guardrail
1GitHub stars
An independent evaluation of TypeSafe's Jev as a prompt-injection detector: 6,991 Jev calls across six tests with three comparison detectors, publishing all code, inputs, per-prompt results and figures, plus a written analysis.
Jev Benchmarks & Evaluations#community#github#security
CommunityRuchith1018/jev-guardrail-evaluationPython
TIEG.SystemOne.LLamaSharp
1GitHub stars
A .NET extension for LLamaSharp implementing a System One pattern: it extracts raw logits from a single parallel batch pass to classify in under 100 ms, bypassing autoregressive generation and reserving VRAM for larger fallback models.
Jev Repos & SDKs#community#github#dotnet
CommunityTheIntelligentEnterpriseGroup/SystemOne.LLamaSharpC#
Zulvis System One
1GitHub stars
A self-hosted System One API billed as drop-in compatible with TypeSafe Jev: a bidirectional encoder with direct decision heads returns calibrated probabilities and structured choices in a single forward pass of about 33 ms.
Jev Repos & SDKs#community#github#fastapi
CommunityZulfiFazhar/system-oneHTML
SystemOne Gate
1GitHub stars
A local decision engine for AI agents and software developers, built on the System One architecture in TypeSafe's Jev style and running fully offline through Ollama 0.35+. Ships a CLI, an MCP server and a Python library for error triage, diff review, shell guardrails and routing.
Jev Tools & CLIs#community#github#python
Communitybeliciobcardoso/systemone_gatePython
Jev
1GitHub stars
A small Python repository whose GitHub description says it uses the JEV model to align patents with concepts. No README, topics or license were captured in the round-eleven sweep, so its pipeline and results cannot be verified beyond that sentence.
Jev Tools & CLIs#community#github#python
Communitybill9924/jevPython
Jev
1GitHub stars
A Python repository named Jev whose GitHub description reads System One Models and Jev. The round-eleven capture contains no README, so what it implements, how it calls Jev and how to run it are all unverified beyond the metadata.
Jev Repos & SDKs#community#github#python
Communitybinodsuman/JevPython
SystemOneStudio
1GitHub stars
A no-code training platform for judgment models: define a judgment task, import decision samples, build a training set, train candidate probabilities, verify calibration and publish a service. The README says phase P3 is in implementation with no real GPU evidence yet.
Jev Tools & CLIs#community#github#python
Communitycers-ai/SystemOneStudioPython
jeva
1GitHub stars
A self-trainable 2B browser-agent decision model that speaks TypeSafe's /v1/systemone protocol, so an existing jev-ultrafast agent is repointed with a one-line base-URL change. Runs as a 1.6 GB Q4_K_M GGUF under llama.cpp at about 236 ms per decision.
Jev Models & Reimplementations#community#github#python
Communitychemany/jevaPython
System One Arcade
1GitHub stars
A Bun workspace pairing a typed decision API over System One providers with a React arcade where decision models play games and every call is stored and ranked. The sample code calls Jev through OpenRouter with boolean, choice and score questions.
Jev Demos & Experiments#community#github#typescript
Communitydesplega-ai/system-oneTypeScript
FDE Ticket Escalator
1GitHub stars
A LangGraph agent for the Forward Deployed Engineer role that classifies incoming support tickets with a Jev decision node, auto-closes basic issues to Tier 1 and sends technical ones to an LLM summarizer. The README notes Jev is mocked by a standard LLM in this demo.
Jev Agents & MCP#community#github#python
Communitydevanshudhoble/FDE-_Ticket_-EscalatorPython
ChangeGate
1GitHub stars
A confidence-aware decision gate for autonomous software changes. It runs an explicit LangGraph flow of inspect, checks and evaluate, then routes each proposal to apply, human review or stop; the decision provider can be the TypeSafe Jev API.
Jev Tools & CLIs#community#github#typescript
Communityjacobjerryarackal/change-gateTypeScript
dsh-memj
1GitHub stars
A memory plugin for the DeepSeek Harness that binds knowledge and handoff documents to projects in one local Markdown directory. Its settings include a decision-model page for JEV-style models over the /v1/systemone protocol, used for active injection and end-of-turn scoring.
Jev Agents & MCP#community#github#javascript
Communityjojoman2024/dsh-memjJavaScript
Jev Proxy Pool
1GitHub stars
A self-hostable HTTP proxy that fronts TypeSafe Jev through one endpoint, rotating your API keys automatically and serving the /v1/systemone wire format. Keys live in Upstash Redis or an environment variable, and a web admin page manages them.
Jev Tools & CLIs#community#github#typescript
Communityleft0ver/jev-proxy-poolTypeScript
agent-reflex
2GitHub stars
A plugin and skill for coding agents that guards shell commands, compacts history and adapts thinking effort using any System One decision model: TypeSafe Jev via API, OpenRouter, Vercel AI Gateway, OpenCode Zen or a self-hosted llama.cpp, Ollama or LM Studio server.
Jev Agents & MCP#community#github#typescript
Communitypsygreg/agent-reflexTypeScript
Jev Speed Race
1GitHub stars
A benchmark that races Jev against a frontier chat model on the same job — routing 40 customer-support tickets into four categories — and reports time, tokens and cost per ticket, with an animated replay site and simulated demo results.
Jev Benchmarks & Evaluations#community#github#typescript
Communitystevenjb5M/JevTypeScript
jew-guard
1GitHub stars
An opencode security plugin powered by Jev that risk-scores every tool call before it runs and scans every result for prompt injection afterwards. Deny blocks, ask prompts and allow runs, with configurable thresholds and an optional fail-closed mode.
Jev Agents & MCP#community#github#javascript
Communitysurfaceflinger/jew-guardJavaScript
SystemOne Builder
1GitHub stars
An open Apache-2.0 toolkit to train, benchmark and serve System One decision models on your own hardware, with Kenning as the flagship model. Models answer typed questions with calibrated probabilities behind a POST /v1/systemone endpoint.
Jev Repos & SDKs#community#github#python
Communitysystemonedev/systemone-builderPython
systemone-drone
1GitHub stars
A browser playground where N drones fly on one shared 16x11 grid, each controlled by a System One decision model through OpenRouter. Mock mode runs with no key, and every rule number is editable in the panel without code changes.
Jev Demos & Experiments#community#github#javascript
Communitywnoronha/systemone-droneJavaScript
Jev TypeScript Starter
0GitHub stars
A TypeScript starter for Jev called through the Vercel AI Gateway with the AI SDK. It wraps evaluate calls in an askJev helper and ships a support-ticket triage example using choice, score and boolean questions.
Jev Demos & Experiments#community#github#typescript
Community1leetadmin/JEVTypeScript
typesafe-systemone
0GitHub stars
An unofficial async Rust client for the TypeSafe System One API, mirroring the shape of the official Python and JavaScript SDKs. It builds noul, choice and score questions with a fluent builder and returns calibrated probabilities.
Jev Repos & SDKs#community#github#rust
Community2commits/typesafe-systemoneRust
jev-local
0GitHub stars
A local, CPU-only Jev-Style-0.8B-Decision-v3 service with an oh-my-pi extension that points the agent's typesafe judge provider at it over loopback HTTP. No GPU, no API key, and the 505 MiB model is fetched separately.
Jev Integrations & Adapters#community#github#local
Community7n1m4/jevShell
JevRetriever
0GitHub stars
A Python retrieval framework that wraps an existing base retriever and asks TypeSafe Jev after each pass whether the accumulated evidence is sufficient or another retrieval round is useful. Jev judges sufficiency, coverage, relevance, redundancy and missing information.
Jev Repos & SDKs#community#github#python
CommunityAditya-on/JevRetrieverPython
InboxPilot
0GitHub stars
Confidence-gated email triage for founders, powered by Jev: it sorts each message into urgent, wait or noise and only auto-acts when sure. Doubtful mail goes to a morning digest with suggested actions for one-tap approval.
Jev Tools & CLIs#community#github#python
CommunityAdityaPagare619/inboxpilotPython
JEV Fraud Risk POC
0GitHub stars
A local Java benchmark that plays 10,000 deterministic transactions through two fraud pipelines: every one to Qwen via Ollama, or through System One/Laya first, where a low-risk answer at confidence 0.70 or higher stops before the chat model.
Jev Benchmarks & Evaluations#community#github#java
CommunityAliveMonster/JEVJava
Decision Lab
0GitHub stars
A local visual playground for System One decision APIs: build Yes/No, Choice and Score decisions, compare hosted Jev, OpenJEV or local Laya on the same input, and watch what-if changes move the answers and probabilities.
Jev Demos & Experiments#community#github#javascript
CommunityAmine-LG/decision-labJavaScript
systemone-email-cleaner
0GitHub stars
A local Go CLI that reads each Gmail message's headers and a short body preview, asks a System One decision model to classify it, applies cleaner/* labels and trashes only genuine junk, with an append-only audit log and rollback.
Jev Tools & CLIs#community#github#go
CommunityAngeeelD/systemone-email-cleanerGo

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.