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.
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- 3,904
- Categories
- 11
- Official
- 102
- Community
- 3,802
- Source sites
- 293
- Deep dives
- 3,904
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3904- Docs169
- Repos & sites3095
- Videos74
- Posts104
- Articles384
- Playgrounds78
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All 3904 Jev AI model resources
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Showing 3601–3648 of 3904 resources
A probability-aware evaluation harness that compares TypeSafe Jev with GLiNER2.5 on zero-shot single-label text classification, measuring calibration, coverage at a fixed error budget, latency, and token cost.
Jev Practices & Patterns#community#python#benchmarks
Community
AbdelStark/jev-benchmarksPython
AbdelStark/jev-benchmarksPythonAn optional routing layer for Hermes Agent, shipped as a Python CLI and library, that sends a request and a public skill catalogue to Jev and returns route, no_skill, or review plus confidence and candidate distributions.
Jev Tools & CLIs#community#python#routing
Community
GodsBoy/jev-agent-skill-routerPython
GodsBoy/jev-agent-skill-routerPythonA TypeScript browser agent for ego lite that turns one natural-language goal into CLICK, TYPE_TEXT, or SELECT on a numbered element table, with Jev choosing the operation and target in one request.
Jev Tools & CLIs#community#typescript#browser
Community
romaluev/jev-egoTypeScript
romaluev/jev-egoTypeScriptAn unofficial Python CLI and stdio MCP server for Jev: send text or JSON state with typed questions and get machine-readable noul, choice, or score answers from the official API, OpenRouter, Vercel, or a proxy.
Jev Tools & CLIs#community#python#cli
Community
tumf/jev-cliPython
tumf/jev-cliPythonA Python library that reranks search results and filters retrieved documents with Jev, scoring each candidate's usefulness as evidence and dropping those below a configurable threshold before RAG context is assembled.
Jev Repos & SDKs#community#python#reranking
Community
hotchpotch/jev-rerankerPython
hotchpotch/jev-rerankerPythonA ManiSkill demo where plain-English goals drive a simulated Franka Panda: Jev picks one primitive per step from a catalog of about 30 hardcoded skills, and Python executes the move. No training or policy.
Jev Cookbooks#community#python#robotics
Community
TarunTomar122/jev-askable-armPython
TarunTomar122/jev-askable-armPythonA hosted and self-hostable pull-request reviewer where Jev answers a Clean Code question set for each changed file and Luna writes the review from those answers; also exposed as a stateless Streamable HTTP MCP server.
Jev Tools & CLIs#community#typescript#mcp
Community
frostney/clean-code-reviewTypeScript
frostney/clean-code-reviewTypeScriptA Pi extension that keeps conversation text verbatim while pruning stale tool history with Jev keep-or-drop decisions, falling back to Pi's built-in summary compaction when pruning cannot free enough context.
Jev Tools & CLIs#community#typescript#compaction
A TypeScript library that wraps Jev answers in a policy, a confidence gate, shadow mode, reusable recipes, and an offline eval CLI, so structured decisions can drive actions an application ships.
Jev Repos & SDKs#community#typescript#agents
Community
AntonioCoppe/jev-harnessTypeScript
AntonioCoppe/jev-harnessTypeScriptAn experimental TypeScript harness that connects evidence to Jev judgments, permitted actions, and verified outcomes, with pluggable data sources and tools, local JSONL traces, and zero runtime dependencies.
Jev Repos & SDKs#community#typescript#agents
Community
Kevthetech143/super-jevPython
Kevthetech143/super-jevPythonTwo WebAssembly builds of the Chocolate Doom 3.1.1 engine play the same Freedoom map from the same initial state, with a Jev Choice decision picking each tactical macro and a local controller turning it into inputs.
Jev Cookbooks#community#typescript#games
Community
lukaske/jev-doom-agentTypeScript
lukaske/jev-doom-agentTypeScriptA Pi extension that turns constraints stated in conversation into a scoped, replayable policy and checks every side-effecting tool call against it before it runs, with Jev only classifying how each message changes the policy.
Jev Tools & CLIs#community#typescript#guardrails
Community
Nyarlathoteppppp/pi-heedTypeScript
Nyarlathoteppppp/pi-heedTypeScriptA browser tool that checks whether a cited paper supports the sentence citing it: code matches references and verifies quotes, Claude proposes an evidence passage, and Jev scores supports, contradicts, or says nothing.
Jev Tools & CLIs#community#javascript#browser
A toy archipelago air-traffic demo where every in-flight judgment - divert or continue, declare an emergency, give way, and who lands first - is made live by Jev from each plane's local state in about 150 ms.
Jev Practices & Patterns#community#html#demo
Community
lbotinelly/jev-little-airwaysHTML
lbotinelly/jev-little-airwaysHTMLA record-linkage library and CLI where the match rule is written in plain English: Jev answers pair questions with a probability, with local candidate blocking and match resolution.
Jev Repos & SDKs#community#python#data
Community
keltokhy/jlinkPython
keltokhy/jlinkPythonA local proxy between Claude Code and the Anthropic API that picks the model and effort level per message with Jev, routing subagents whenever cheap but gating main-chat switches on prompt-cache arithmetic.
Jev Tools & CLIs#community#typescript#routing
Community
adarshmishra07/jcm-routerTypeScript
adarshmishra07/jcm-routerTypeScriptA local screening workbench for a folder of CVs: it asks Jev a small fixed set of typed questions about each candidate, scores the answers with plain arithmetic you can read, and shows a sortable shortlist.
Jev Tools & CLIs#community#typescript#classification
Community
gtaras7/typesafe-jevTypeScript
gtaras7/typesafe-jevTypeScriptA Chinese and English lateral-thinking puzzle site hosted by Jev: Choice questions classify player questions and check proposed solutions against required facts, while code enforces confidence thresholds before a puzzle is marked solved.
Jev Cookbooks#community#typescript#games
Community
spoonnotfound/soupbaseTypeScript
spoonnotfound/soupbaseTypeScriptA tldraw canvas controlled by voice and a webcam-tracked fingertip: every partial transcript triggers one Jev request through OpenRouter's Decisions API that decides the action, shape, colour, and place.
Jev Cookbooks#community#javascript#browser
Community
gaborishka/jev-canvasJavaScript
gaborishka/jev-canvasJavaScriptA Codex plugin and npm library that wraps native session compaction: Jev scores every tool call and result, and the verbatim history it keeps is re-injected after Codex summarizes. The README does not recommend using it.
Jev Tools & CLIs#community#typescript#codex
An Agent Skill that sends closed coding-agent judgments to TypeSafe Jev and acts on the probabilities, asking for yes/no, choice, and score answers in about 250 ms while the main coding model keeps writing code.
Jev Tools & CLIs#community#python#skills
Community
HyunjunJeon/jev-judgmentPython
HyunjunJeon/jev-judgmentPythonAn independent calibration study of Jev against a frontier fallback on Banking77 and Web of Science, packaged as the janus-decide tool that measures a routing threshold on your own data instead of shipping a default one.
Jev Practices & Patterns#community#python#routing
Community
FirasSX914/JanusPython
FirasSX914/JanusPythonA single-binary Rust gate that screens staged git diffs for unredacted secrets, prompt-injection attacks, and destructive commands with calibrated Jev probabilities in about 80 ms, invoked as git jev.
Jev Tools & CLIs#community#rust#cli
Community
AkashPriyadarshii/jev-gitRust
AkashPriyadarshii/jev-gitRustAn original Civilization II browser harness for Jev: named Choice vectors cover empire policy, cities, research, diplomacy, units, exploration, and warfare, with live decision probabilities in a Roman-themed spectator display.
Jev Cookbooks#community#python#games
Community
phyous/tsai-civ2Python
phyous/tsai-civ2PythonA social network where 10,000 computed personas read your post: Jev scores who the text is for to pick the first 600 readers, then answers one Choice per persona for its reaction.
Jev Cookbooks#community#javascript#cloudflare
Communitygaborishka/jevtownJavaScript
gaborishka/jevtownJavaScriptA reproducible harness that scores Jev Ultrafast research-browser runs over 11 baseline cases plus human and quant stress suites with CoS-locked QC grades, regenerating the field note and trace notebooks offline.
Jev Practices & Patterns#community#python#evaluation
Community
jgridifier/jev-research-evalHTML
jgridifier/jev-research-evalHTMLA pi extension that exposes TypeSafe Jev judgments as five tools, calling POST /v1/systemone directly with native fetch so your code and users keep control of thresholds, weights, and actions.
Jev Tools & CLIs#community#typescript#agents
A Pi extension and library that gives the agent and other extensions one consented, key-managed Jev client, with a batched typesafe_evaluate tool for classify, triage, compare, and score judgments.
Jev Repos & SDKs#community#typescript#sdk
Community
DevMortimer/pi-typesafeTypeScript
DevMortimer/pi-typesafeTypeScriptA Rust derive layer for typed System One decisions: enums and structs become Choice, Score, and Noul questions with compile-time-checked, confidence-gated answers, plus a scriptable fake client for network-free tests.
Jev Repos & SDKs#community#rust#sdk
CommunityAbdelStark/s1-rsRust
AbdelStark/s1-rsRustA dependency-free Swift 6 client for the TypeSafe AI System One API, ported from the official JavaScript and Python SDKs, with Choice, Score, and Noul questions, strict concurrency, and configurable retries.
Jev Repos & SDKs#community#swift#sdk
Community
alterhq/typesafe-sdk-swiftSwift
alterhq/typesafe-sdk-swiftSwiftA tool-call gate for Claude Code, Codex, Cursor, and other harnesses backed by Jev: deterministic rules and a read-only allowlist run first, then one request answers allow, ask, or deny in about 400 ms.
Jev Tools & CLIs#community#python#guardrails
Community
eugeniughelbur/jev-engineeringPython
eugeniughelbur/jev-engineeringPythonA streaming grep-by-meaning CLI that judges each line with one Jev yes/no question and prints the lines above a threshold, built to sit behind tail -f, kubectl logs -f, or journalctl -f.
Jev Tools & CLIs#community#python#cli
Community
allebee/jevgrepPython
allebee/jevgrepPythonAn experimental TypeScript gate that asks Jev one wake, not-yet, or unrelated Choice before resuming a sleeping agent's LLM, while code handles timers, user messages, skip limits, errors, and timeouts.
Jev Tools & CLIs#community#typescript#agents
Community
shitianfang/wakegateTypeScript
shitianfang/wakegateTypeScriptAn ACP and MCP adapter that bridges TypeSafe Jev with any LLM: native Jev when TYPESAFE_API_KEY is set, or Codex, Claude, Grok, OpenCode, and OpenAI-compatible endpoints standing in as System One when it is not.
Jev Repos & SDKs#community#typescript#mcp
Community
tacticocc/JevbridgeTypeScript
tacticocc/JevbridgeTypeScriptA desktop Snake experiment where Jev assesses the board each tick and Python combines its answers into a move; one recorded run reached 29 foods in 461 ticks before trapping itself.
Jev Cookbooks#community#python#games
Community
siroccomask/snake-jevPython
siroccomask/snake-jevPythonAn open-source, commercially hosted generative-engine-optimization platform that uses Jev judgments within a broader application to track brand mentions and placement in AI answers across ChatGPT, Claude, Gemini, and Perplexity.
Jev Tools & CLIs#community#typescript#postgres
Community
usenotra/notraTypeScript
usenotra/notraTypeScriptA Chrome extension and small web app that skips YouTube sponsor reads: Jev names transcript lines or answers yes/no about what it heard, and code owns every timestamp that gets cut.
Jev Tools & CLIs#community#javascript#chrome-extension
A CLI and Python library that selects source-linked evidence within a token budget using Jev Noul relevance judgments plus local diversity-aware selection, with no labels, vector database, or generative model required.
Jev Tools & CLIs#community#python#cli
Communitykeltokhy/jselectPython
keltokhy/jselectPythonA Next.js playground that benchmarks Jev against GPT-5.6 Luna, Claude Haiku 4.5, Gemini 3.5 Flash Lite, and GPT-6 Astra in tic-tac-toe and Connect Four, giving every model the same legal-move Choice options through the Vercel AI Gateway.
Jev Practices & Patterns#community#typescript#evaluation
Community
hegargarcia/jev-playgroundTypeScript
hegargarcia/jev-playgroundTypeScriptA Stop hook that keeps coding agents from quitting early: rules written in plain language are scored by Jev in about 0.7 seconds, and a violated rule sends the agent back to work instead of letting it stop.
Jev Tools & CLIs#community#python#claude-code
Community
noplan-inc/limpetPython
noplan-inc/limpetPythonA terminal Wikipedia link-race tool: Chromium fetches article pages, Jev ranks their outgoing links by expected remaining hops, and Python runs a beam search without a search API or a controller model.
Jev Cookbooks#community#python#cli
Community
komikat/jev-bfsPython
komikat/jev-bfsPythonA self-hosted AI trading platform that can put Jev in front of strategy and Quick Trade entry orders as an auditable PASS/REJECT gate, with LLM fallback and deterministic bypasses for exits and protective orders.
Jev Cookbooks#community#python#trading
Community
OpenByteInc/QuantDingerPython
OpenByteInc/QuantDingerPythonA Python toolkit that installs nine plain SKILL.md files for Hermes, Claude Code, and Codex, letting Jev route models, filter retrieved passages, select skills, and choose bounded computer or browser actions.
Jev Tools & CLIs#community#python#agents
Community
kerpopule/hermes-jev-skillsPython
kerpopule/hermes-jev-skillsPythonAn open, non-autoregressive System One model with published weights and a TypeSafe-compatible /v1/systemone API; the 395M-parameter OptionMarker checkpoint scores discrete and ordinal questions locally.
Jev Repos & SDKs#community#python#open-models
Community
wfzyx/vonPython
wfzyx/vonPythonAn educational Jev-like inference project for Apple Silicon: Qwen3.5-0.8B scores candidate answers from shared multimodal context instead of generating text, with browser, CLI, and HTTP interfaces.
Jev Repos & SDKs#community#python#open-models
Community
hr98w/jev-visualPython
hr98w/jev-visualPythonAn Android overlay that reads visible WeChat, QQ, and X conversations through accessibility, asks Jev for intent, danger, and the best action, then drafts three replies and fills one in without ever sending it.
Jev Tools & CLIs#community#kotlin#android
Community
jev-chat/jev-chat-jarvisKotlin
jev-chat/jev-chat-jarvisKotlinA Rust coding-agent harness and TUI that uses Jev to pick a model and effort, route bounded utility work, and decide what context to keep, with code constraining every choice and validating results.
Jev Tools & CLIs#community#rust#coding-agent
Community
samuelfaj/distillRust
samuelfaj/distillRustA ModernBERT-based open decision model that evaluates Choice, Score, and Noul schemas in one non-autoregressive pass; Verdict 2.0 reports 77.10% accuracy on 2,000 held-out enterprise decisions.
Jev Practices & Patterns#community#python#open-models
Start here with the Jev AI model
Hand-picked entries the maintainers recommend first, from official primitives to community tools.
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
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
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.
Can Jev Improve Demonstration Retrieval for In-Context Learning?Jev Benchmarks & Evaluations
Don't Call It a Decision ModelJev Practices & Patterns
Fast, Cheap, and Fair? Evaluating Decision ModelsJev Benchmarks & Evaluations
JEV-27B for Core AIJev Models & Reimplementations
JevBreak: Your Model, Their DecisionJev Benchmarks & Evaluations
- LLM Output Evaluation with ClefJev Benchmarks & Evaluations
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 NewsReddit: 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 NewsHacker 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 NewsHacker 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 NewsHacker 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 NewsHow 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.