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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 2401–2448 of 3904 resources

jcr
19GitHub stars
Capability resolver that uses Jev to search a nested command catalog and return selected instruction context to an agent through one MCP tool, keeping the search outside agent context.
Jev Agents & MCP#community#jevbest#catalog-import
CommunityNiazMorshed2007/jcrJavaScript
jev-foundation-models
118GitHub stars
Native Swift 6 bridge that evaluates typed Generable structs and enums against app state through on-device Core ML, self-hosted HTTP, or hosted Jev endpoints.
Jev Integrations & Adapters#community#jevbest#catalog-import
Communitypeterfriese/jev-foundation-modelsSwift
jevalyn
20GitHub stars
Rails decision layer that evaluates noul, choice and score questions about app state in one Jev request, with per-question confidence floors that gate auto-action versus human review.
Jev Integrations & Adapters#community#jevbest#catalog-import
CommunityRay-Hughes/jevalynRuby
live-jev
21GitHub stars
Browser top-down driving sim that sends sensor JSON to Jev every 200ms with four typed driving questions in one call, then applies confidence gating and reflex rules to steer.
Jev Demos & Experiments#community#jevbest#catalog-import
Communityvinilana/live-jevJavaScript
jev-rs
17GitHub stars
Rust harness that turns any decoder into a Jev-compatible typed-judgment endpoint over logprobs, with MCP judge tool, HTTP wire server, and eval plus calibration commands.
Jev Tools & CLIs#community#awesomejev#catalog-import
Communityyijunyu/jev-rsRust
jev-recipes
23GitHub stars
TypeScript recipe library with 248 focused functions that call Jev for routing, reranking, gating and labelling, returning structured ready-or-review decisions for Node backends.
Jev Agents & MCP#community#awesomejev#catalog-import
Communityagencyenterprise/jev-recipesTypeScript
sift
12GitHub stars
Chrome extension that labels each X post with Substance, Humor, Chit-chat, Promo or Junk plus AI-written and off-topic flags, collapsing hidden posts to one line.
Jev Demos & Experiments#community#jevbest#catalog-import
Communitybohutang/siftJavaScript
openvons
13GitHub stars
Decision layer answering finite text, vision and voice choices with none-of-the-above probabilities and execute, confirm or reject policy, plus a JevPick speculative decoder.
Jev Practices & Patterns#community#jevbest#catalog-import
Communitygenai-craft/openvonsPython
jev_stock
16GitHub stars
Python experiment that builds a past-only market state for a Hong Kong code plus HSI and HSTECH, asks Jev for up, flat or down direction, and saves JSON with an HTML report.
Jev Practices & Patterns#community#jevbest#catalog-import
Communitysosopop/jev_stockPython
jevocks
41GitHub stars
Stock decision terminal that gathers Valyu market evidence across five categories and uses Jev for a typed 30-day outlook with probability, signals, and timing.
Jev Tools & CLIs#community#jevbest#catalog-import
Communityunicodeveloper/jevocksTypeScript
flue-jev-demo
11GitHub stars
Standalone Flue example that routes support chat through Cloudflare Workers AI, using gpt-4o-mini for chat and Jev for typed intent and urgency routing.
Jev Demos & Experiments#community#awesomejev#catalog-import
Communitymatthewp/flue-jev-demoTypeScript
fable-jev
10GitHub stars
Dual-brain routing that pairs Jev reflex judgments with get-fable deterministic invariants, plus lossless context compaction and shadow-mode telemetry.
Jev Guides & Articles#community#awesomejev#catalog-import
CommunityimMamdouhaboammar/fable-jevTypeScript
jev-sentinel
13GitHub stars
Coding-agent guard that puts Jev intent and risk checks in front of tool calls, tool outputs, and replies across Pi, Claude Code, and Codex CLI.
Jev Agents & MCP#community#awesomejev#catalog-import
Communityharshwasan/jev-sentinelTypeScript
twitter-jev-guard
9GitHub stars
Chrome and Edge extension that scores X posts with Jev and overlays STOP watermarks on likely low-quality posts and AD marks on promoted posts.
Jev Tools & CLIs#community#awesomejev#catalog-import
Communityqs-lll/twitter-jev-guardJavaScript
jevcache
12GitHub stars
Local OpenAI-compatible proxy that skips repeat model calls on same-intent paraphrases and retried agent turns, judged by Jev or a local System One model.
Jev Agents & MCP#community#awesomejev#catalog-import
Communitykushals256/jevcacheTypeScript
jevflow
11GitHub stars
TypeScript library that keeps probabilistic Jev judgments separate from deterministic workflow policy with explicit thresholds and inspectable outcomes.
Jev Tools & CLIs#community#awesomejev#catalog-import
CommunityMawfyy/jevflowTypeScript
hearth-jev-rental-search
8GitHub stars
Rental search agent that drives a real Chrome across Craigslist, Facebook Marketplace, Redfin, and Zillow and returns one shortlist with photos and links.
Jev Tools & CLIs#community#awesomejev#catalog-import
CommunityNancy-Chauhan/hearth-jev-rental-searchJavaScript
jevymarket
14GitHub stars
Polymarket bot that pairs a web-search researcher brief with Jev pricing, trading only where Jev probability clears the order book by a set edge.
Jev Agents & MCP#community#awesomejev#catalog-import
Communitymarkusbug/jevymarketPython
jev_project_context
10GitHub stars
Research-memory skill that keeps experiment claims traceable with ten operations, provenance gates, and optional batched Jev audits over memory files.
Jev Practices & Patterns#community#awesomejev#catalog-import
Communitypoiuyjie/jev_project_contextPython
AnyDecisionModel
21GitHub stars
Swift package for typed yes-or-no, choice, and score decisions with MLX, Core AI, and Jev backends behind one session API.
Jev Practices & Patterns#community#awesomejev#catalog-import
Communitymattt/AnyDecisionModelSwift
jevmory
11GitHub stars
Local memory layer that stores verbatim agent quotes in per-project SQLite and grades them with Jev into stale, wrong, unsupported, or keep verdicts.
Jev Practices & Patterns#community#awesomejev#catalog-import
Communityromiluz13/jevmoryPython
JevBystander
15GitHub stars
Android accessibility app that reads visible WeChat single-chat text and asks Jev for intent, emotion, urgency, and posture, showing exactly 3 Toasts without writing replies or changing WeChat.
Jev Demos & Experiments#community#awesomejev#catalog-import
CommunityNisaka520/JevBystanderKotlin
lejudge-jev-jepa
10GitHub stars
English-programmable cost module for JEPA PushT planning: linear probes verbalize imagined latents and Jev judges each constraint step, folded into CEM cost with memoised step facts.
Jev Tools & CLIs#community#awesomejev#catalog-import
CommunityAbdelStark/lejudge-jev-jepaPython
jev-chat-jarvis-ios
51GitHub stars
iOS custom keyboard that analyses copied chat text with TypeSafe Jev for intent plus risk, then drafts two candidates per persona for tap-to-insert without auto-sending.
Jev Tools & CLIs#community#awesomejev#catalog-import
Communityjev-chat/jev-chat-jarvis-iosSwift
JevGuide
41GitHub stars
WeChat relationship assistant that combines screen reading, one 8-question Jev judgment with a strategy score, per-contact memory, and three chat-model replies behind a resident score bar.
Jev Demos & Experiments#community#awesomejev#catalog-import
CommunityNisaka520/JevGuideKotlin
typesafe-skill-router
14GitHub stars
Opt-in Hermes plugin that routes each turn to one skill: a wide Jev Choice plus request checks gate a narrow fits round, injecting a single ignorable hint line.
Jev Agents & MCP#community#jevbest#catalog-import
CommunityDECRUX9812/typesafe-skill-routerPython
Jev
10GitHub stars
PowerShell module that asks Jev typed yes-no, choice, and score questions from the pipeline, raising named answers as object properties for filtering and selection.
Jev Repos & SDKs#community#jevbest#catalog-import
Communitydfinke/JevPowerShell
pi-quiet-ask
12GitHub stars
Pi extension that puts Jev behind coding-agent hooks: JSON packs ask closed questions on redacted state and turn probabilities into block, confirm, annotate, or steer actions.
Jev Agents & MCP#community#jevbest#catalog-import
CommunityHyunjunJeon/pi-quiet-askTypeScript
hermes-jev
42GitHub stars
Async supervisory layer for Hermes Kanban workers: locked DoD contracts, evidence tracking, budgeted trajectory checks, and Jev only for unresolved semantic criteria.
Jev Agents & MCP#community#jevbest#catalog-import
Communitykeeltrace/hermes-jevPython
jev-style
21GitHub stars
Local Qwen3.5 decision models in 0.8B and 2B sizes with fitted temperatures, systemone-shaped server, playground, guard, MCP tools, and eval harness.
Jev Demos & Experiments#community#jevbest#catalog-import
Communitylawrence3699/jev-stylePython
xtags
11GitHub stars
Chrome extension that labels each X post with intent plus rage-bait, synthetic, and undisclosed-ad signals from Jev, with threshold-only rendering and local caching.
Jev Demos & Experiments#community#jevbest#catalog-import
Communitymanifoldor/xtagsHTML
jev-feels
21GitHub stars
Ruby gem that models Jev as field predicates: feels and decide bind to model attributes with shared definitions, thresholds, confidence gates, batching, and test tapes.
Jev Integrations & Adapters#community#jevbest#catalog-import
CommunityQew7/jev-feelsRuby
jev-router
10GitHub stars
Node router that sends each query to the cheapest capable LLM tier by asking Jev to classify demand against your tier descriptions, with no LLM call spent on routing.
Jev Agents & MCP#community#jevbest#catalog-import
Communityrajdhakad9826/jev-routerTypeScript
typesafe-sdk-go
9GitHub stars
Go SDK for the TypeSafe API that asks typed Noul, Choice, and Score questions about a state and returns probability distributions with confidence and typed accessors.
Jev Repos & SDKs#community#jevbest#catalog-import
CommunityTangerg/typesafe-sdk-goGo
jpp
30GitHub stars
Experimental language where questions and methods are composable values, with standalone .jpp sources run by a native Rust kernel and a Python implementation kept as reference.
Jev Integrations & Adapters#community#jevbest#catalog-import
CommunityTowow-ai/jppRust
jevscape
13GitHub stars
RuneBench fork that connects Jev to RuneScape through an rs-sdk checkout, offering about 50 bounded catalog actions that Jev selects by probability while code executes them.
Jev Agents & MCP#community#awesomejev#catalog-import
CommunitySkyvern-AI/jevscapeTypeScript
jev.nu
8GitHub stars
Nushell module for Jev that pipes state into jev ask with noul, choice, and score builders, returning numeric answers that filter and sort in the pipeline.
Jev Practices & Patterns#community#awesomejev#catalog-import
Communitycablehead/jev.nuNushell
JevSwiftSDK
8GitHub stars
Dependency-free Swift package for the System One HTTP API with typed Choice, Score, and Noul questions, batched evaluation, and reusable question sets.
Jev Repos & SDKs#community#awesomejev#catalog-import
CommunityNSStudent/JevSwiftSDKSwift
aside-jev
8GitHub stars
Browser workflow that keeps one Aside REPL session open, compacts page observations into allowed candidates, and has Jev pick the next action with confidence checks.
Jev Demos & Experiments#community#awesomejev#catalog-import
Communityhimomohi/aside-jevPython
keys-mcode-continuous-context-browser-decision-enhancement-pack
8GitHub stars
Enhancement pack for the MiniMax Code CLI with TUI patches, continuous context renewal, a local-vLLM compaction fix, and a measured arm64 browser lane.
Jev Demos & Experiments#community#awesomejev#catalog-import
Communitydrowzeys/keys-mcode-continuous-context-browser-decision-enhancement-packPython
jev-minesweeper
8GitHub stars
Browser Minesweeper demo that asks one Noul mine question per frontier cell in a single Jev request, decides opens and flags from probabilities, and falls back to an exact solver.
Jev Tools & CLIs#community#awesomejev#catalog-import
Communitycomoc/jev-minesweeperJavaScript
semantic-live-caption
10GitHub stars
Streaming caption page pairing append-only ASR with per-sentence Jev annotation for key points, emotion, and intent, with custom labels and optional DeepSeek discovery.
Jev Tools & CLIs#community#awesomejev#catalog-import
Communitylimboinf/semantic-live-captionHTML
hermes-and-jev-play-minecraft
10GitHub stars
Minecraft setup where Hermes plans at milestones, Jev picks one bounded harness action per step, and Mineflayer code owns validity and execution with no screenshots.
Jev Practices & Patterns#community#awesomejev#catalog-import
Communityteknium1/hermes-and-jev-play-minecraftJavaScript
local-jev
19GitHub stars
Local offline System One server speaking the hosted /v1/systemone wire format, so existing SDK code runs unchanged against small on-machine models.
Jev Practices & Patterns#community#awesomejev#catalog-import
Communityamithgc/local-jevPython
eikos-arena
8GitHub stars
Paper-trading arena where Eikos-27B and Jev get the same market view and 28 typed questions every five minutes across 14 Hyperliquid perpetuals with simulated fills.
Jev Practices & Patterns#community#jevbest#catalog-import
Communitycaiovicentino/eikos-arenaPython
zod-jev
8GitHub stars
Zod 4 companion that adds Jev meaning checks to shape checks: one parseAsync call sends every semantic rule as noul questions in a single request and turns probabilities into ordinary Zod issues.
Jev Repos & SDKs#community#jevbest#catalog-import
Communityjomatsu/zod-jevTypeScript
jev-browser-bridge
10GitHub stars
Agent bridge that connects any CDP-speaking browser to Jev by reading the DOM instead of the rendered layout, so headless or non-drawing browsers can still drive CLICK, TYPE_TEXT, SELECT, WAIT, DONE, and BLOCKED steps.
Jev Demos & Experiments#community#jevbest#catalog-import
Communitylexmount/jev-browser-bridgePython
JEMM
14GitHub stars
Open-weight multimodal judgment engine served over HTTP with a Jev-style POST /v1/systemone endpoint, answering choice, noul, and score questions from text or text plus screenshots on a local GPU.
Jev Demos & Experiments#community#jevbest#catalog-import
Communityypcypc/JEMMPython

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.