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
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- Official
- 102
- Community
- 3,802
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- 293
- Deep dives
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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 2737–2784 of 3904 resources
A 30-question quiz that names a feature from AWS, Azure or Google Cloud with the brand removed and asks Jev which cloud it belongs to, drawing the returned probability distribution as three bars.
Jev Demos & Experiments#community#awesomejev#catalog-import
Community
minorun365/jev-cloud-quizTypeScript
minorun365/jev-cloud-quizTypeScriptA local workbench that pulls A-share quotes from AKShare or Tushare, computes indicators and candlestick patterns in Python across eight dimensions, and has Jev score each dimension into a buy, hold or sell call.
Jev Tools & CLIs#community#awesomejev#catalog-import
A GitHub Action that labels new issues only when the label probability and the model's own confidence both clear thresholds you set, and otherwise leaves the issue untouched and says why.
Jev Integrations & Adapters#community#awesomejev#catalog-import
Community
emreozyoruk/hushJavaScript
emreozyoruk/hushJavaScriptWindows-first scanner and EDR triage tool that extracts structural features from binaries, scripts, documents and URLs, then has Jev return a severity score and a verdict for each target.
Jev Tools & CLIs#community#awesomejev#catalog-import
Community
newuser7171/antivirusPython
newuser7171/antivirusPythonRust event bus where routing is a judgment call: one event plus one typed question per subscription goes to a Jev judge, and the calibrated probabilities decide drop, review or deliver.
Jev Practices & Patterns#community#awesomejev#catalog-import
Community
zkjoie/jevbusRust
zkjoie/jevbusRustPython MCP server exposing Jev System One as five typed tools, including a batched evaluate that runs a map of questions in one call, so agents consume probabilities instead of parsing prose.
Jev Agents & MCP#community#awesomejev#catalog-import
Community
rajasekharponakala/jev-mcpPython
rajasekharponakala/jev-mcpPythonPython CLI that sends each document's text extract to a Jev Choice question and files the file into a matching category folder, with a local laya backend available for offline runs.
Jev Practices & Patterns#community#awesomejev#catalog-import
Community
jexp/watfilePython
jexp/watfilePythonClaude Code plugin for Rust review that runs Clippy and cargo-semver-checks itself, has Jev triage changed units for defects no tool reports, then verifies each candidate finding before it reaches you.
Jev Agents & MCP#community#awesomejev#catalog-import
Community
kindintelligence/jev-rust-reviewRust
kindintelligence/jev-rust-reviewRustCursor router that has Jev pick a cost, balanced or intelligence tier per task, then enforces deterministic policy on top: security-sensitive work escalates and financial or deploy actions need approval.
Jev Agents & MCP#community#awesomejev#catalog-import
Community
Bodila51/Jev-chooses-a-LLMTypeScript
Bodila51/Jev-chooses-a-LLMTypeScriptFramework-agnostic guard layer that puts Jev in front of an agent's tool calls: a Choice risk tier, a Noul destructiveness check and a Score blast radius decide allow, deny or ask.
Jev Practices & Patterns#community#awesomejev#catalog-import
Community
lgy1027/jevshieldPython
lgy1027/jevshieldPythonSymfony app that streams a public French support-request dataset into SQLite and qualifies each request in background batches: Choice for intent, Score for urgency, Noul for whether it is a bug to forward.
Jev Integrations & Adapters#community#awesomejev#catalog-import
Simulated Perseverance crossing real USGS Jezero terrain where Jev answers narrow onboard questions in about 250 ms, Claude writes the sol plan in 15 to 80 s, and code owns every threshold.
Jev Demos & Experiments#community#awesomejev#catalog-import
Trading engine for Polymarket's five-minute Bitcoin up-or-down market: code computes P(Up) from a Chainlink feed, and Jev contributes a regime score plus vetoes on anomalous windows and direction.
Jev Practices & Patterns#community#awesomejev#catalog-import
Single-tool MCP server for Jev: send state plus a map of noul, choice or score questions to evaluate and get typed answers with probabilities and confidence back.
Jev Practices & Patterns#community#awesomejev#catalog-import
Community
anasbekheit/typesafe-jev-mcpRust
anasbekheit/typesafe-jev-mcpRustNext.js demo that reads a draft social post and returns three typed reads from one Jev call: tone as a Choice, virality as a 0 to 3 Score, cringe risk as a Noul, plus a verdict stamp.
Jev Demos & Experiments#community#awesomejev#catalog-import
Community
silky-x0/PostmarkTypeScript
silky-x0/PostmarkTypeScriptWordPress plugin that asks TypeSafe Jev typed questions about your content and hands back a probability, a named choice or a rubric score with confidence, so themes branch on values instead of parsing prose.
Jev Demos & Experiments#community#awesomejev#catalog-import
Community
juanlentino/jev-connectorPHP
juanlentino/jev-connectorPHPRubyLLM provider that turns typed questions — noul, choice and score — into calibrated answers with probabilities, confidence and per-call cost, and adds reranking through RubyLLM.rerank.
Jev Practices & Patterns#community#awesomejev#catalog-import
FastAPI demo that turns PDF text into candidate answers to your questions with Jev, then maps the returned probabilities back to the exact chunks and page positions they came from.
Jev Demos & Experiments#community#awesomejev#catalog-import
Public wall where a short question goes to Jev for a yes, no or it depends verdict with confidence in about 100 ms, with the cost of the run tracked live; signed in, Jev also picks which model answers.
Jev Demos & Experiments#community#awesomejev#catalog-import
Community
waynesutton/ask-jev-aiJavaScript
waynesutton/ask-jev-aiJavaScriptClaude Code plugin that sends four typed questions about each Bash, Write and Edit call to Jev and composes the answers into a warning or a native permission prompt, in shadow mode by default.
Jev Agents & MCP#community#awesomejev#catalog-import
Python MCP server exposing Jev's three official question types plus compare, verify and batch classify, with an installer subcommand that writes the client config and a measured cost per call.
Jev Practices & Patterns#community#awesomejev#catalog-import
Community
wangkuangkuang/jev-mcp-serverPython
wangkuangkuang/jev-mcp-serverPythonPaseo plugin that classifies each message with Jev or a local Laya model and routes it to one of your presets, each carrying its own provider, model, reasoning setting and instructions.
Jev Agents & MCP#community#awesomejev#catalog-import
MCP server fronting TypeSafe Jev over HTTP for Claude Code and Codex, wrapping six tools with server-side confidence gating, cost caps, caching and a metadata-only decision log.
Jev Agents & MCP#community#awesomejev#catalog-import
Community
Songokou1983/jev-mcpPython
Songokou1983/jev-mcpPythonA HackSpain HappyRobot-track entry that runs a simulated emergency end to end: Jev reads the calls, an LLM emits policy weights, a linear_sum_assignment solver builds the plan, and Minecraft Paper renders the state.
Jev Demos & Experiments#community#awesomejev#catalog-import
Community
CarlosCaoLopez/HACKSPAIN-2026Python
CarlosCaoLopez/HACKSPAIN-2026PythonA bridge from the TypeSafe platform into Symfony AI, published under the Symfony organisation, whose README points at TypeSafe's documentation for System One, the question primitives, models and the API reference.
Jev Demos & Experiments#community#awesomejev#catalog-import
Community
symfony/ai-type-safe-platformPHP
symfony/ai-type-safe-platformPHPA minimal local server exposing POST /v1/systemone, documented in three commands: uv sync to install dependencies, uvicorn main:app --reload to run it, and a curl payload in the System One request shape.
Jev Tools & CLIs#community#awesomejev#catalog-import
Community
pjt3591oo/laya-serverPython
pjt3591oo/laya-serverPythonA find alternative with one extra predicate, --like, that matches files by what they are rather than what they are called; tree walking, -name, -type and .gitignore stay local, and only survivors reach jev.
Jev Demos & Experiments#community#awesomejev#catalog-import
Community
religa/jfindPython
religa/jfindPythonSix runnable Python demos for TypeSafe's Jev covering the three primitives and six combination patterns, plus four notes on the programming model, the API contract, patterns and a live-key comparison.
Jev Demos & Experiments#community#awesomejev#catalog-import
A local natural-language workspace for a fictional team: ask for a board, table, cards, bubbles, grouped canvas or calendar, then follow up to reassign work, move panels, add events or build a checklist.
Jev Demos & Experiments#community#awesomejev#catalog-import
Neovim plugin that classifies your prompt with a single Jev choice question over the OpenRouter Decisions API, then dispatches to one of four native handlers: open a file, edit code, run a command, or answer a question.
Jev Agents & MCP#community#awesomejev#catalog-import
Community
Mawfyy/jev-router.nvimLua
Mawfyy/jev-router.nvimLuaSnake arena where every AI snake is steered live by Jev: one call per tick sends a `choice` question per snake and gets a move plus a probability back for all of them at once.
Jev Demos & Experiments#community#awesomejev#catalog-import
A plain-markdown extraction of 110 documents from the TypeSafe documentation site, kept in the order they appeared before the site was removed, with an index linking each file.
Jev Tools & CLIs#community#awesomejev#catalog-import
Community
thiagoadril/typesafe-docs
thiagoadril/typesafe-docsn8n community node that asks Jev several independent questions about the same state in one execution, returning typed probabilities for choice, yes/no and rubric scoring questions.
Jev Integrations & Adapters#community#awesomejev#catalog-import
A synchronizer that watches the official TypeSafe docs, agent skill and SDK repositories and regenerates a provenance-tracked reference: current state, semantic events and human-readable change reports.
Jev Repos & SDKs#community#awesomejev#catalog-import
Community
chenrui333/jev-docsPython
chenrui333/jev-docsPythonAn MCP server packaged as both a Codex and a Claude Code plugin, exposing eight read-only tools that turn Jev probabilities into proceed/review recommendations for routing, ranking, extraction and claim checks.
Jev Agents & MCP#community#awesomejev#catalog-import
Community
E-FL/typesafe-as-a-judgeJavaScript
E-FL/typesafe-as-a-judgeJavaScriptAn open-weight Jev-class lab: a candidate-logit scorer that turns state plus a bounded rubric into calibrated probabilities per option in a single forward pass, with no generation and no parsing.
Jev Practices & Patterns#community#awesomejev#catalog-import
Community
metask-ai/metask-jevPython
metask-ai/metask-jevPythonA Codex Skill that hands Jev the task summary plus the host's real model list, so Jev picks a model and reasoning effort for an independent subtask and Codex executes with it.
Jev Agents & MCP#community#awesomejev#catalog-import
A Turkish chat toy that answers every message with one of five fixed phrases, using Jev as an evaluation model so the five-word limit is enforced by the type system rather than by prompting.
Jev Practices & Patterns#community#awesomejev#catalog-import
A DSH plugin that lets the agent consult two GPT teachers, a plan teacher and an expert teacher with a costly escalation tier, while Jev only advises whether asking is worth it at all.
Jev Agents & MCP#community#awesomejev#catalog-import
Community
LXBWOW/dsh-teacher-consultJavaScript
LXBWOW/dsh-teacher-consultJavaScriptA DSH compaction backend that swaps only the summarize() hook: instead of asking a model to rewrite history into a summary, it asks Jev two yes/no questions per tool call and drops only the stale ones, keeping user and assistant prose verbatim.
Jev Agents & MCP#community#awesomejev#catalog-import
CommunityLXBWOW/dsh-context-curatorJavaScript
LXBWOW/dsh-context-curatorJavaScriptA DSH plugin that checks whether an agent's claim of finished work holds up, using deterministic evidence from code and one batched Jev request per turn. Under policy_v 3 the probabilities are logged only; they decide nothing.
Jev Agents & MCP#community#awesomejev#catalog-import
A DSH plugin, published to npm, that registers one agent tool, jev_decide, so a coding agent can ask TypeSafe's Jev a typed question and get a calibrated probability instead of guessing from intuition.
Jev Practices & Patterns#community#awesomejev#catalog-import
Community
nanami-0713/dsh-jev-decideJavaScript
nanami-0713/dsh-jev-decideJavaScriptGrades the coding agent sessions already sitting on your disk. Jevalyzer reads Claude Code, Codex CLI, opencode, Gemini CLI and Antigravity transcripts, scores each exchange, and renders an interactive HTML report or terminal dashboard.
Jev Practices & Patterns#community#awesomejev#catalog-import
Community
killerz3/jevalyzerTypeScript
killerz3/jevalyzerTypeScriptAn MCP server exposing a single judge tool that answers noul, choice and score questions about any JSON application state in one fast request, backed by TypeSafe's System One model with an opt-in Cloudflare Workers AI provider.
Jev Agents & MCP#community#awesomejev#catalog-import
A community-maintained .NET 10 client for the official TypeSafe Jev API, covering the Choice, Score and Noul primitives with Microsoft.Extensions.AI composition, model discovery and ten runnable samples. Released as tentative 0.6.0 with live compatibility unverified.
Jev Repos & SDKs#community#awesomejev#catalog-import
Community
elbruno/ElBruno.AI.JevC#
elbruno/ElBruno.AI.JevC#A Chrome extension that blocks ads with no filter lists at all. Each ad-shaped element is described in a few structural fields and sent to Jev as one batched Choice question per element, with every threshold owned by code.
Jev Demos & Experiments#community#awesomejev#catalog-import
Community
fazlerocks/jev-adblockTypeScript
fazlerocks/jev-adblockTypeScriptAn n8n community node that classifies, scores and checks text with Jev, shaped like the built-in Text Classifier with one output branch per category plus a Needs Review branch, and built for volume with parallel requests and packed batches.
Jev Integrations & Adapters#community#awesomejev#catalog-import
Archived. A Jev-compatible HTTP server that lets any Jev client run against local Laya weights instead of the TypeSafe API, serving POST /v1/systemone with typed choice, score and noul answers. Upstream laya now ships this natively.
Jev Demos & Experiments#community#awesomejev#catalog-import
Community
stiermid/laya-servePython
stiermid/laya-servePythonStart 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.