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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 2305–2352 of 3919 resources

hookmeter-jev
22GitHub stars
Browser extension that scores social hooks keystroke by keystroke with Jev curiosity, emotion, pattern and clickbait checks plus short fix tips.
Jev Demos & Experiments#community#jevbest#catalog-import
Communityehui1226/hookmeter-jevHTML
rikkahub-sillytavern-android
103GitHub stars
Android chat client and SillyTavern-compatible endpoint with prefix-cache fixes, layered memory, plugins, and Jev-assisted screening.
Jev Tools & CLIs#community#jevbest#catalog-import
CommunityMiaoWuNYA/rikkahub-sillytavern-androidKotlin
jev-agent-design-with-topk-logits-choices
4GitHub stars
Research runtime that pages a large logical tool and context space through a small bounded Jev decision surface with explicit approvals.
Jev Agents & MCP#community#jevbest#catalog-import
Community6Mikao9/jev-agent-design-with-topk-logits-choicesPython
duckdb-jev
30GitHub stars
DuckDB extension that asks a Jev question about every row in SQL and returns a typed ENUM, DOUBLE, or STRUCT column instead of generated text.
Jev Integrations & Adapters#community#jevbest#catalog-import
Communitycolliber/duckdb-jevC++
JEV-Paper-Radar
33GitHub stars
Forkable weekday radar that asks Jev one yes-or-no question per interest over each new arXiv announcement and publishes a page plus RSS feed.
Jev Tools & CLIs#community#jevbest#catalog-import
CommunityEliot5566/JEV-Paper-RadarPython
pi-advisor
50GitHub stars
Pi extension that keeps a fast Executor model on implementation and brings in a separate Advisor model for consequential choices and reviews.
Jev Agents & MCP#community#jevbest#catalog-import
Communityphilipbrembeck/pi-advisorTypeScript
Pi-Jev-Guide
21GitHub stars
Pi guard plugin that checks inputs and tool calls with local rules plus Jev semantic judgements, with redaction and verification reminders.
Jev Demos & Experiments#community#jevbest#catalog-import
Communityzszz3/Pi-Jev-GuideTypeScript
jev-code
22GitHub stars
TypeScript SDK and CLI coding agent where Jev only picks options while your code runs effects, building programs as syntax trees.
Jev Agents & MCP#community#awesomejev#catalog-import
Communityrhighs/jev-codeTypeScript
stuntd
70GitHub stars
Self-hosted proxy that records typed decisions, distils them into small heads on a frozen encoder, and answers locally when confident.
Jev Demos & Experiments#community#jevbest#catalog-import
Communitybladedevoff/stuntdPython
ErisLint
23GitHub stars
Rust CLI that sends selected source to the Jev API under JSON-defined choice rules and maps answers to warnings or errors.
Jev Agents & MCP#community#jevbest#catalog-import
CommunityEriskii/ErisLintRust
Multi-Agent
18GitHub stars
Local engine with TypeScript and Python SDKs that runs Claude Code and Codex sessions as a warm team with a durable mailbox.
Jev Agents & MCP#community#jevbest#catalog-import
Communitymasonlee39/Multi-AgentTypeScript
jot
20GitHub stars
General-purpose System One agent where Jev chooses tools and arguments while Jot executes them and loops until it can reply.
Jev Demos & Experiments#community#awesomejev#catalog-import
Communityrunta-dev/jotTypeScript
notjev
23GitHub stars
Zero-dependency client that turns any logprobs-capable chat endpoint into typed choice, boolean, and score decisions with abstention.
Jev Demos & Experiments#community#jevbest#catalog-import
Community9pings/notjevJavaScript
Cheshi
18GitHub stars
Desktop workspace for AI-assisted development that pairs Codex conversations with local CodeGraph indexes, plus editing, Ghostty terminal panes, and Git in one app.
Jev Tools & CLIs#community#jevbest#catalog-import
CommunityCheshiAI/CheshiC
cnki-skills
24GitHub stars
Skill pack for Codex, Claude Code, and WorkBuddy that drives CNKI topic search, result parsing, detail reading, downloads, citation export, screening tables, and resumable task ledgers.
Jev Agents & MCP#community#jevbest#catalog-import
Communitylongkou1988/cnki-skillsPython
jev-on-a-laptop
25GitHub stars
Unofficial laptop study of parallel constrained decoding: prefill once, share the KV cache across fields, and decide all schema fields in one batched forward pass without writing JSON.
Jev Practices & Patterns#community#jevbest#catalog-import
Communityrorshopping/jev-on-a-laptopPython
pi-dcp
17GitHub stars
Pi extension that trims wasted context before each model call by deduplicating repeated tool results, stripping failed payload args, and letting the model summarize closed spans.
Jev Tools & CLIs#community#jevbest#catalog-import
CommunityDavidcreador/pi-dcpTypeScript
snap
8GitHub stars
Local decision engine that answers letter-choice questions from one forward pass: shared prefill, one batched decode, and softmax over option letters with no text generation or repair.
Jev Demos & Experiments#community#jevbest#catalog-import
Communityemnlmn/snapRust
jev-macos-loop
23GitHub stars
Native macOS computer-use agent on Apple silicon that finds controls with local CoreML detection, OCR, and accessibility, then asks Jev to pick the next finite-choice action.
Jev Demos & Experiments#community#jevbest#catalog-import
Communityjcpsimmons/jev-macos-loopJavaScript
open-jev
42GitHub stars
Open harness that renders allowed JSON answers on a diffusion canvas, denoises for a fixed step budget, then picks the top allowed tokens from final logits with no training.
Jev Demos & Experiments#community#jevbest#catalog-import
CommunityJoshuaSP/open-jevPython
hermes-nerve
42GitHub stars
Async supervisory layer for Hermes Agent that locks Definitions of Done, proves mechanical criteria locally, and calls Jev only for unresolved semantic checks under a token budget.
Jev Tools & CLIs#community#jevbest#catalog-import
Communitykeeltrace/hermes-nervePython
jev-reflex-autonomy-lab
23GitHub stars
Browser drone-fleet lab where TypeSafe Jev steers each drone as fast reflexes and an optional planner offers one-use strategy advice when confidence drops, without pausing control.
Jev Demos & Experiments#community#jevbest#catalog-import
Communitykhordoo/jev-reflex-autonomy-labTypeScript
oh-my-harness
17GitHub stars
Single-command harness that turns a plain-language stack description into synced docs plus blocking hooks for Claude Code, Codex, and Pi, with deterministic presets or one Jev chooser call.
Jev Agents & MCP#community#jevbest#catalog-import
Communitykyu1204/oh-my-harnessTypeScript
JEV-CPU
18GitHub stars
CPU port of the SemIf decision pattern with a browser UI: type state and runtime criteria, then read typed option probabilities from one open-model forward pass with no GPU.
Jev Demos & Experiments#community#jevbest#catalog-import
Communityleesk212/JEV-CPUPython
Jev
19GitHub stars
Six side-by-side web demos where Jev returns typed probabilistic decisions, plain code owns routing, and a switchable small model writes the words for Claude or Kimi tiers.
Jev Demos & Experiments#community#jevbest#catalog-import
Communitymayank953/JevJavaScript
zero-api-key-web-search
19GitHub stars
Python CLI and MCP server for keyless web search over DuckDuckGo or self-hosted SearXNG, with an optional local Laya sieve that filters, reranks and stance-checks evidence before it reaches an agent.
Jev Agents & MCP#community#jevbest#catalog-import
Communitywd041216-bit/zero-api-key-web-searchPython
jev-yaba-wechat
24GitHub stars
macOS floating WeChat companion that reads the visible chat with on-device Vision OCR, judges intent and reply risk with Jev, drafts toned replies with GPT, and only fills text after you approve it.
Jev Tools & CLIs#community#jevbest#catalog-import
Communitywuxie888/jev-yaba-wechatPython
dsh-jev
24GitHub stars
Jev decision layer for DeepSeek Harness that narrows visible tools, gates risky calls, guards retry loops and routes models, with Jev permitted only to restrict or gate, never to widen access.
Jev Agents & MCP#community#jevbest#catalog-import
Communitybuberlo/dsh-jevTypeScript
eikos
41GitHub stars
Open MIT family of typed-decision models in 4B and 27B with GPU and Apple Silicon builds, answering structured questions in one forward pass with calibrated per-option probabilities.
Jev Demos & Experiments#community#jevbest#catalog-import
Communitycaiovicentino/eikosPython
a3m-router
17GitHub stars
Self-hosted OpenAI-compatible router on port 8787 that sends each prompt to the cheapest capable model across free, budget, mid and premium tiers, with heuristic auto and Jev-backed routing modes.
Jev Agents & MCP#community#jevbest#catalog-import
CommunityDas-rebel/a3m-routerTypeScript
jev-column-race
23GitHub stars
Live race rig that labels 1,000 real app reviews with Jev typed questions against Gemini JSON output on identical batches, then replays recordings and re-ranks rows locally without extra model calls.
Jev Practices & Patterns#community#jevbest#catalog-import
Communitygoodrahstar/jev-column-raceJavaScript
jev-gmail-ai-spam-filter-and-labeling
23GitHub stars
Self-hosted Google Apps Script that classifies Gmail by meaning with Jev Choice over your own dozen-label taxonomy, checking metadata first and full content only when confidence demands it.
Jev Tools & CLIs#community#jevbest#catalog-import
Communityilyamk/jev-gmail-ai-spam-filter-and-labelingJavaScript
jeval
23GitHub stars
Offline evaluator that checks whether classifier confidences match reality and converts mistake costs into a deployable threshold, emitting an HTML report plus machine-readable threshold files.
Jev Practices & Patterns#community#jevbest#catalog-import
Communityrlaope/jevalPython
transcript-lens
18GitHub stars
Turkish Next.js app that classifies transcript passages with Jev instead of rewriting them, finding chapters, heatmap moments, claim types and topic matches while showing original wording.
Jev Tools & CLIs#community#jevbest#catalog-import
Communitysensahin/transcript-lensTypeScript
jev-cli
37GitHub stars
Rust terminal tool that asks Jev noul, choice and score questions about piped text or files and returns calibrated probabilities with stable exit codes for shell scripts, CI jobs and agents.
Jev Agents & MCP#community#jevbest#catalog-import
Communityshaharia-lab/jev-cliRust
JevLoop
23GitHub stars
Runnable agent harness that moves pick, score and yes-no loop choices to Jev or Laya in milliseconds while reserving the language model for writing, compiling DECISION.md into executable questions.
Jev Agents & MCP#community#jevbest#catalog-import
Communityzjunlp/JevLoopTypeScript
muse-jev-playbook
25GitHub stars
Agent-oriented playbook for using Jev as a cheap, fast decision layer that triages, classifies, scores, and gates work before expensive browser, research, retry, or subagent steps.
Jev Agents & MCP#community#awesomejev#catalog-import
CommunityBodila51/muse-jev-playbookPython
deepreseach-learing
54GitHub stars
LangGraph deep-research agent that plans, searches, reads pages, aggregates evidence, checks gaps, and writes a Markdown report with sources, built as a runnable tool and a staged learning reference.
Jev Agents & MCP#community#jevbest#catalog-import
Community1612535983/deepreseach-learingPython
invalidate
23GitHub stars
Memory-maintenance library that checks every stored memory against each new event with Jev yes-or-no votes, then marks stale facts superseded or contradicted instead of editing them.
Jev Integrations & Adapters#community#jevbest#catalog-import
Communitychopratejas/invalidatePython
jev-test-filter
36GitHub stars
Diff-aware test selector that sends the git diff to Jev with one question per test, then prints the native filter flags and hands them to vitest, jest, node, bun, Playwright, cargo, or go test.
Jev Agents & MCP#community#jevbest#catalog-import
Communitymizchi/jev-test-filterTypeScript
x-scanner
23GitHub stars
Chrome extension that sends each X post to Jev with six typed questions in one call near the viewport, then renders a behavior chip under the post plus a session cost and latency panel.
Jev Demos & Experiments#community#jevbest#catalog-import
Communityoso95/x-scannerTypeScript
jevvy
23GitHub stars
Permissions plugin for coding agents that reviews unresolved shell approval requests with Jev and auto-approves only harmless ones, leaving everything else in the normal permission flow.
Jev Agents & MCP#community#jevbest#catalog-import
CommunityPanAchy/jevvyTypeScript
jev-studio
16GitHub stars
Python kit pairing a Jev CLI for verify, screen, classify, extract, match, route, ask, find, rerank, compact, and batch with an MCP server exposing the Jev ruleset over stdio.
Jev Demos & Experiments#community#jevbest#catalog-import
Communityutk2103/jev-studioPython
yanwai
52GitHub stars
Android WeChat assistant that analyzes visible text and voice transcripts for emotion and intent, then drafts分条 reply options and topic openers you copy and send yourself.
Jev Tools & CLIs#community#jevbest#catalog-import
CommunityYIRC99/yanwaiKotlin
pi-review
15GitHub stars
Isolated multi-reviewer code review as CLI, CI gate, and agent skill, running fresh read-only Pi sessions singly or as a consensus panel with structured verdicts and exit codes.
Jev Agents & MCP#community#jevbest#catalog-import
CommunityZephyrDeng/pi-reviewTypeScript
jev-tetris
20GitHub stars
Live versus Tetris where Jev faces Claude Haiku 4.5, Gemini 3.8 Flash, or local open-weight Laya on the same seeded piece sequence; cleared lines arrive as garbage rows and the first to top out loses.
Jev Demos & Experiments#community#awesomejev#catalog-import
Communitytrungdq88/jev-tetrisJavaScript
typesafe-ai-playground
26GitHub stars
Independent community Next.js playground for Jev experiments: editable typed questions, A/B input comparisons, conversation routing, document extraction, code-policy review, plus game and simulation workspaces.
Jev Demos & Experiments#community#jevbest#catalog-import
CommunityBunsDev/typesafe-ai-playgroundTypeScript
hunch
19GitHub stars
Ruby control-flow helper that asks plain-English questions about text or app data via a System One model and returns probabilities, picks, or ordered ratings for use directly in code.
Jev Integrations & Adapters#community#jevbest#catalog-import
Communitycarldaws/hunchRuby

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.