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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 3169–3216 of 3904 resources

Claude Code Templates
32.7kGitHub stars
A Claude Code configuration CLI shipping Jev modules for model routing, skill suggestion, tool guardrails, auto-mode gates, and sandbox hooks.
Jev Agents & MCP#community#typescript#coding-agent
Communitydavila7/claude-code-templatesPython
enigma-jev
3GitHub stars
A browser Enigma I you can type on, plus live Bletchley-style breaking where Jev ranks cribs and judges plaintext, with research pages and CLI backtests.
Jev Demos & ExperimentsPlayground#community#playground#evaluation
Communityagodoy21/enigma-jevTypeScript
Odyssey
A cinematic lunar expedition in the browser where Jev acts as flight director while telemetry, launch, and orbit scenes play out.
Jev Demos & ExperimentsPlayground#community#playground#games
Community
WORKLAUDE learn
A spoken-language learning experience where video scenes branch on TypeSafe Jev decisions instead of multiple-choice clicks.
Jev Demos & ExperimentsPlayground#community#playground#agents
Community
Jev wiki
An independent wiki on TypeSafe's System One model: primitives, pricing, latency bands, console playground links, and ecosystem pointers.
Jev Guides & ArticlesDocs#community#docs#explainer
Community
typesafe-jev-calibrate-for-code-review
3GitHub stars
A calibration write-up and scripts for Jev comment and code rules on a Unity project, with ordering.py to compare rule versions on real blocks.
Jev Benchmarks & Evaluations#community#evaluation#code-review
CommunitySelmar/typesafe-jev-calibrate-for-code-reviewPython
TypeSafe's Jev Can't See. I Made It Guess What I Drew Anyway
A preregistered Quick, Draw! study: 400 SVG-sketch classifications with Jev versus Sonnet on the same text, plus base64 and image baselines.
Jev Benchmarks & EvaluationsArticle#community#article#evaluation
Community
hev reranker
17GitHub stars
A BEIR reranking recipe that asks up to 30 parallel Noul relevance questions in one Jev state, with RESULTS.md against cross-encoders and hosted rerankers.
Jev Benchmarks & Evaluations#community#evaluation#python
Communityhev/rerankerPython
decide
2GitHub stars
A shell-first CLI for yes or no, multiple-choice, and leveled decisions through TypeSafe Jev, composable with files and JSON context in scripts.
Jev Integrations & Adapters#community#cli#shell
Communityvsekhar/decideSwift
onesie
3GitHub stars
A Unix-pipeable CLI that asks Jev (or Berget System One models) one question over stdin, with shell-safety exit codes and a calibrate subcommand.
Jev Integrations & Adapters#community#cli#shell
Communityfrodi-karlsson/onesieGo
Show HN: Decide – Jev decisions in the shell
The Hacker News thread for vsekhar/decide, a brew-installable CLI that pipes scripts and agent skills through TypeSafe Jev.
Jev Guides & ArticlesPost#community#integration
Community
Show HN: onesie – pipeable CLI for System One models
The Hacker News thread for frodi-karlsson/onesie, covering stdin questions, shell-safety gates, and calibration over labelled commands.
Jev Guides & ArticlesPost#community#integration#evaluation
Community
Show HN: Jev as the Bletchley Park Analyst
The Hacker News thread for enigma-jev, a software Bombe plus live Enigma demo where Jev picks cribs and judges German plaintext.
Jev Guides & ArticlesPost#community#evaluation#games
Community
Show HN: Worklaude – learn by speaking
The Hacker News thread for WORKLAUDE, described as video scenes that branch on TypeSafe Jev while learners speak.
Jev Guides & ArticlesPost#community#agents
Community
Calibrating Jev as a Code Reviewer
The Hacker News thread for Selmar's calibration notes on Jev comment rules, batching traps, and ordering.py comparisons.
Jev Guides & ArticlesPost#community#evaluation#code-review
Community
TypeSafe's Jev Can't See. I Made It Guess What I Drew Anyway
The Hacker News thread for Bartosz Mikulski's 400-drawing Jev versus Sonnet evaluation on SVG text.
Jev Guides & ArticlesPost#community#evaluation
Community
Show HN: Jev, Fly Me to the Moon
The Hacker News thread for Odyssey at fly.rahmanyoonus.com, a lunar flight experience with Jev as flight director.
Jev Guides & ArticlesPost#community#games
Community
Cua
30kGitHub stars
The Cua computer-use platform documents a jev-use recipe where TypeSafe Jev picks bounded action IDs and Cua Driver executes clicks and fills in the browser.
Jev Demos & Experiments#community#browser#computer-use
Communitytrycua/cuaRust
pyGPT
2kGitHub stars
A desktop AI assistant with a Jev / System One inline plugin for classification, routing, verification, and scoring without chat-style output.
Jev Tools & CLIs#community#python#desktop
Communityszczyglis-dev/py-gptPython
Paca
1.9kGitHub stars
A Go-based team workspace with optional Jev AI for agent auto-routing, task auto-fill, auto-assign, and automation condition nodes.
Jev Tools & CLIs#community#go#agents
CommunityPaca-AI/pacaGo
Fast Browser Use
231GitHub stars
An agent skill that reproduces Jev-style single-step logits over indexed browser controls using local Qwen weights for offline browser use.
Jev Demos & Experiments#community#browser#open-models
CommunityAPUS-AI-Lab/fast-browser-usePython
CodexQA Jev Browser
51GitHub stars
A Playwright-based CodexQA skill where Jev chooses indexed controls on a page-built index while the browser executes the action.
Jev Demos & Experiments#community#browser#playwright
Communityopenqa-cn/jev-browserTypeScript
surf
638GitHub stars
A CLI browser automation tool with optional Jev semantic mode: Surf observes, Jev selects the next action, Surf validates and acts, Jev checks the goal.
Jev Tools & CLIs#community#browser#cli
Communitynicobailon/surf-cliTypeScript
TradingAgents
111.8kGitHub stars
Multi-agent trading research with optional Jev screening of StockTwits and Reddit posts for company relevance before sentiment analysis runs.
Jev Tools & CLIs#community#python#trading
CommunityTauricResearch/TradingAgentsPython
agent-desktop
1.8kGitHub stars
Rust CLI that gives agents computer use through OS accessibility trees instead of screenshots: snapshot a live UI, act on stable element refs, then re-verify. Ships a jev-desktop skill where Jev picks the operation and target from accessibility-tree candidates.
Jev Demos & Experiments#community#jevbest
Communitylahfir/agent-desktopRust
agentconnect
1.5kGitHub stars
Open-source platform that puts ACP-compatible agents such as Claude Code, Codex, and Pi inside the team's Slack, Telegram, Discord, and GitHub workflows, with reusable Jev decisions for routing, response gating, and reviewer selection.
Jev Agents & MCP#community#jevbest
Communityagentconnect-md/agentconnectTypeScript
NeoHorse
1.7kGitHub stars
Open-weight 4B and 9B models from TokenRhythm: NeoHorse-1 for tool use, coding, and instruction following, plus NeoHorse-Jev-4B for prefill-only Choice, Noul, and Score decisions.
Jev Models & Reimplementations#community#jevbest
CommunityTokenRhythm/NeoHorsePython
ai
1.2kGitHub stars
The official Laravel AI SDK: one interface across providers such as OpenAI, Anthropic, and Gemini, covering agents with tools and structured output, image generation, audio, and embeddings.
Jev Integrations & Adapters#community#jevbest
Communitylaravel/aiPHP
jeff
1.5kGitHub stars
A 0.8B decision model that answers first and escalates only when unsure, plus nine LoRA adapters of roughly 41 MB each for guard, triage, tool choice, spam, and similar classification work.
Jev Models & Reimplementations#community#jevbest
Communityfirelex/jeffPython
learn-agent-architecture
1.1kGitHub stars
A section-by-section guide to agent harnesses - loop, tool runtime, permissions, hooks, subagents, skills, memory, background work - using Claude Code, mini-swe-agent, Hermes Agent, and deepseek-harness as worked examples.
Jev Integrations & Adapters#community#jevbest
Communityhardness1020/learn-agent-architecturePython
celesto
1kGitHub stars
Sandboxed virtual machines for agents: each sandbox is a microVM that starts in about 500 ms, keeps files and state between sessions, and runs locally or in Celesto Cloud behind a CLI and Python SDK.
Jev Demos & Experiments#community#jevbest
CommunityCelestoAI/celestoPython
aiavatarkit
692GitHub stars
A Python speech-to-speech avatar framework: swappable VAD, STT, LLM, and TTS modules behind one streaming pipeline, with WebSocket, telephony, LINE, and OpenAI-compatible channel adapters on top.
Jev Integrations & Adapters#community#jevbest
Communityuezo/aiavatarkitPython
vexjoy-agent
442GitHub stars
A four-layer agent toolkit for Claude Code, Codex, Factory, and Reasonix: 43 agents, 62 skills, 78 hooks, 147 scripts, and a Jev-backed router that gates dispatch on intent alignment.
Jev Agents & MCP#community#jevbest
Communitynotque/vexjoy-agentPython
horosa-skill
469GitHub stars
An AGPL MCP server and JSON-first CLI exposing 110 astrology and metaphysics techniques from Horosa to local AI clients, running offline on macOS and Windows with SQLite-backed call history.
Jev Tools & CLIs#community#jevbest
CommunityHorace-Maxwell/horosa-skillPython
smithers
439GitHub stars
Smithers turns issues into reviewed, tested changes through flows defined beside your code, with an optional step that keeps the project wiki current. The 1.0 release candidate runs from a source checkout.
Jev Integrations & Adapters#community#jevbest
Communitysmithersai/smithersTypeScript
deepopen
2kGitHub stars
DeepOpen is a non-autoregressive decision engine built on Laya that classifies into developer-defined types in one forward pass, with a language router picking between English, multilingual, and typed-decision checkpoints.
Jev Models & Reimplementations#community#jevbest
Communitydeepopen-com/deepopenPython
claude-code-trace
380GitHub stars
Claude Code Trace renders the JSONL session files in ~/.claude/projects/ as browsable conversations with expandable tool calls, MCP tool names, and token counts, with an optional Jev pass that scores agent efficiency.
Jev Tools & CLIs#community#jevbest
Communitydelexw/claude-code-traceRust
llm-debugger-vscode-extension
361GitHub stars
A VSCode extension that debugs by driving the real debugger: Jev routes each paused step as a typed decision, and a generation model is called only when a breakpoint location, an expression, or a patch is needed.
Jev Tools & CLIs#community#jevbest
Communitymohsen1/llm-debugger-vscode-extensionTypeScript
awesome-typesafe
595GitHub stars
A community field guide to Jev and TypeSafe: the three typed primitives, runnable examples, a table for deciding when code beats a model, and directories of client libraries, agent tooling, and independent evaluations.
Jev Guides & Articles#community#jevbest
CommunityAbdelStark/awesome-typesafeHTML
mu
521GitHub stars
A coding agent built on pi that hands its non-code decisions — what enters the context, whether a command is safe, whether the work is done — to a small judge model at 35 decision points per turn.
Jev Agents & MCP#community#jevbest
Communityqybaihe/muTypeScript
keel
333GitHub stars
A local-first macOS coding workspace that runs Claude Code, Codex, Cursor, Grok, Hermes, and pi over ACP, with a local Laya or hosted Jev selector choosing routes that the host then validates.
Jev Agents & MCP#community#jevbest
Communitycodejunkie99/keelRust
SREGym
356GitHub stars
SREGym stands up live Kubernetes clusters so SRE agents can be evaluated against 90 fault scenarios, including OS-level faults and metastable and concurrent failures, in containers that cannot see the grading logic.
Jev Benchmarks & Evaluations#community#jevbest
CommunitySREGym/SREGymPython
Intern-Decision
829GitHub stars
Decision models that answer several choice, score, and noul questions over a state with probabilities in one forward pass, with training, two inference backends, calibration tooling, and the benchmark suite in the repo.
Jev Models & Reimplementations#community#jevbest
CommunityInternLM/Intern-DecisionPython
decapod
237GitHub stars
Rust governance kernel that sits between your coding agent and the repository, turning intent into bounded specifications, recorded state, and proof-backed publication across many separate invocations.
Jev Agents & MCP#community#jevbest
CommunityDecapodLabs/decapodRust
Albatross
236GitHub stars
Rust terminal coding harness with one TUI across local and cloud providers, per-turn cost on the status line, routed plans scored by explicit policy, real undo, and forkable session paths.
Jev Agents & MCP#community#jevbest
Communitymorganlinton/AlbatrossRust
Open-Jev
418GitHub stars
Decision models that return typed probabilities for candidate labels from a state, instructions, and options, shipped as LoRA adapters plus a trained decision head over pinned Qwen base weights.
Jev Models & Reimplementations#community#jevbest
CommunityZefan-Cai/Open-JevPython
summarize
229GitHub stars
Local-first summarizer for video and posts across 11 or more sources; its optional Jev prefilter scores transcript chunks against include and exclude rules before the summary request is made.
Jev Tools & CLIs#community#jevbest
Communitymartinopiaggi/summarizePython
siftrank
227GitHub stars
Go CLI that ranks large text collections by having a model compare small randomized batches across repeated trials until the order converges; with Jev it combines returned pairwise probabilities.
Jev Tools & CLIs#community#jevbest
Communitynoperator/siftrankGo

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.