All Jev resources
This is the full index of everything Jev: 2231 entries for TypeSafe AI's flagship System One model, from official documentation, SDKs, and cookbooks to community-built clients, MCP servers, agent tools, and write-ups. Every entry is tagged by category, format, and topic, and sorted newest first.
Filter by category or tag, or search titles, descriptions, authors, and repos. Open any card for its detail page — most entries carry a verified deep dive with highlights, caveats, and a quickstart snippet.
- Entries
- 2231
- Categories
- 11
- Official
- 93
- Community
- 2138
- Source sites
- 148
- Deep dives
- 2231
Last updated . Entries are added as they appear and re-checked when they are touched.
Browse Jev by category
11 ways into the ecosystem. Each category page leads with its own shortlist of starting points.
- Repos & SDKs202Client libraries, adapters, and source code you can build on with Jev, from the official Python and TypeScript SDKs to community ports in Go, .NET, and PHP.
- Integrations & Adapters145Framework, platform, gateway, and database integrations that put Jev inside the stack you already run, from LangChain and Pydantic AI to Postgres and Home Assistant.
- Agents & MCP302Agent runtimes, coding-agent gates and routers, MCP servers, and skill or context tooling that hand an agent Jev's typed decisions.
- Tools & CLIs447Standalone Jev CLIs, desktop apps, playgrounds, and utilities you run directly, from shell history and semantic search to dashboards and meters.
- Cookbooks91Official, runnable Jev recipes that show what decision models are good at, each with its own datasets, latencies, and numbers.
- Demos & Experiments363Playable demos, games, simulators, and experiments that put Jev in the loop, from Mario and drones to moderation firehoses and trading bots.
- Practices & Patterns248How to design Jev states, questions, and confidence gates the right way, from the official patterns to the failure modes worth designing around.
- Guides & Articles224Documentation, write-ups, and community hubs for learning Jev, from the canonical docs to independent tutorials and reviews.
- Benchmarks & Evaluations55Benchmarks, calibration studies, independent evaluations, and observability write-ups that measure how Jev actually behaves.
- Models & Reimplementations99Open reimplementations of Jev, retrained heads on small models, and inference-time tricks that reproduce the System One shape with other weights.
- Media & Talks55Videos, talks, podcasts, and news coverage about building with Jev.
Browse Jev by use case or industry
The same directory, sliced by what you are building and who you are building it for.
All 2231 Jev resources
Search the full directory, or filter by category and tag.
Showing 577–624 of 625 resources
304GitHub stars
A source-only preview that builds a separate patched Codex CLI so Jev can raise or lower GPT-6 reasoning effort mid-task and decide how many generations the choice holds. Needs Rust, Node 22 and a native toolchain.
Jev Agents & MCP#community#jevbest
Community
miuuyy/Astra-AresJavaScript
miuuyy/Astra-AresJavaScript235GitHub stars
A curated index of Jev projects grouped by category, with one sentence of intent per repository: demos, official SDKs and skills, browser and desktop automation, agent tooling, and apps and integrations.
Jev Guides & Articles#community#jevbest
Community
Amal-David/awesome-jevPython
Amal-David/awesome-jevPython210GitHub stars
An agent plugin for Pi, Claude Code, Codex CLI and Grok Build that asks Jev two classification questions to decide whether a session sits at a safe compaction boundary, then hints or compacts for you.
Jev Agents & MCP#community#jevbest
572GitHub stars
A CLI plus agent hooks that ask Jev one question per rule in your AGENTS.md on every edit or turn and return a probability, so a violating edit gets repaired inside the same turn. Claude Code, Codex, OpenCode, Pi.
Jev Agents & MCP#community#jevbest
Community
coldteadotai/abideTypeScript
coldteadotai/abideTypeScript598GitHub stars
A generated catalogue that indexes public Jev examples by the decision being made rather than by tool, keeping rows where a person read the call site separate from rows where only a text signal was found.
Jev Guides & Articles#community#jevbest
Community
kydlikebtc/awesome-jevPython
kydlikebtc/awesome-jevPython221GitHub stars
A Docker Compose image that serves DiffusionGemma 26B-A4B on a DGX Spark behind Jev's systemone endpoint, adding seven not-yet-upstream vLLM perf branches and dependency-keyed multi-stage question reads.
Jev Models & Reimplementations#community#jevbest
Community
mmastrac/djev-sparkHTML
mmastrac/djev-sparkHTML197GitHub stars
A Chinese-first desktop workbench for local models whose JEV page runs typed noul, choice and score questions against a local engine or a cloud key, alongside a gateway, RAG knowledge base and shared memory.
Jev Tools & CLIs#community#jevbest
Community
kunpengtalk/OmniStudioTypeScript
kunpengtalk/OmniStudioTypeScript269GitHub stars
Three AI trading bees race each other on OKX perpetual futures. Every decision comes from Jev picking one move from the moves that are legal right now, and every order then passes a risk layer written in plain code. Paper by default, with real market prices.
Jev Demos & Experiments#community#jevbest
Community
imikerussell/beebotsTypeScript
imikerussell/beebotsTypeScript147GitHub stars
A local-first desktop agent for macOS that carries work from a conversation through to a reviewable result, split into Home, Cowork and Crew. The part worth a developer's attention is Crew, where Jev suggests an assignee for a single unassigned task and you accept or ignore it.
Jev Agents & MCP#community#jevbest
Community
Foxtailsss-Andy/Anna-AgentTypeScript
Foxtailsss-Andy/Anna-AgentTypeScript146GitHub stars
A self-hostable API server that fronts text, vision and data endpoints across Ollama, LM Studio, LlamaCpp and a long list of hosted providers, and also runs tool-using agents with sessions. Jev appears separately as a decision provider for typed choice, score and noul questions.
Jev Integrations & Adapters#community#jevbest
Community
donvito/ai-backendsHTML
donvito/ai-backendsHTML363GitHub stars
Open-weight 2B, 4B and 9B decision models that extend Jev's typed question format to photos, so an image plus a record can be checked against options you supply, with a probability on each and an explicit can't-tell. Runs on your own hardware.
Jev Models & Reimplementations#community#jevbest
Community
mohit67890/imajevPython
mohit67890/imajevPython130GitHub stars
Convex's own coding evals, plus a separate multiple-choice decision benchmark in the same repo. Jev is wired into the decision side through OpenRouter's alpha decisions endpoint with a pinned version, while the coding evals still route as chat completions.
Jev Benchmarks & Evaluations#community#jevbest
Community
get-convex/convex-evalsTypeScript
get-convex/convex-evalsTypeScript314GitHub stars
A macOS action layer that lets a planner hand a bounded desktop subtask to a fast decision model which runs the UI loop, plus a driver you can run on its own. Jev is the default backend but the transport is pluggable, and the planner lives outside the package.
Jev Demos & Experiments#community#jevbest
Community
shhivv/arc-cuaPython
shhivv/arc-cuaPython156GitHub stars
A CLI search wrapper that fans out to up to three providers, dedupes the merged results, has Jev score them for relevance against a stated goal, and optionally scrapes and chunk-filters pages so an agent reads less. Saves context, at the cost of a Jev call per batch.
Jev Demos & Experiments#community#jevbest
Community
dorkitude/webctlGo
dorkitude/webctlGo253GitHub stars
A clone of browser-use's jev-ultrafast that swaps the hosted Jev decision call for Laya running locally through MLX, keeping the browser agent, action space and executor but making no paid decision API calls. Apple Silicon only.
Jev Models & Reimplementations#community#jevbest
Community
ipenywis/laya-ultrafastPython
ipenywis/laya-ultrafastPython3kGitHub stars
Contrastive-language-model decision service exposing CLM-8B over a TypeSafe-compatible API: typed Choice, Score and Noul answers plus candidate ranking, with state and action embeddings cached separately so repeat candidates cost one dot product.
Jev Models & Reimplementations#community#jevbest
Community
Contrastive-LM/CLMPython
Contrastive-LM/CLMPython174GitHub stars
Express and Vite playground for System One-style decisions, taking a state plus typed questions and returning structured answers. Three swappable backends: per-option LLM micro-scorers, one structured JSON call, or a locally served decider model.
Jev Models & Reimplementations#community#jevbest
Community
SiliconLabAI/OpenJevTypeScript
SiliconLabAI/OpenJevTypeScript140GitHub stars
Source-audited index of Jev and System One material, in Chinese and English: an integration matrix across SDKs and gateways, papers, evaluations and ecosystem projects, plus a browsable GitHub Pages site with a source log.
Jev Guides & Articles#community#jevbest
Community
Promethe-us/awesome-jev
Promethe-us/awesome-jev105GitHub stars
GPU-rendered terminal multiplexer whose command palette accepts plain-language queries: Jev scores the visible command, tab and session rows so the intended one rises to the top, while local substring matching still answers every keystroke.
Jev Tools & CLIs#community#jevbest
Community
sonnylazuardi/superterminalRust
sonnylazuardi/superterminalRust123GitHub stars
Electron desktop browser where Jev picks the next executable action from a page's observed controls while a separate text model plans; deterministic code builds the action space, validates responses, dispatches input and keeps receipts.
Jev Demos & Experiments#community#jevbest
Community
michaelswissa/jevryTypeScript
michaelswissa/jevryTypeScript168GitHub stars
Android and Windows assistant that reads the chat already on your screen through accessibility nodes or OCR, has Jev judge intent, danger level and urgency in one call, ranks three drafted replies, and fills the input box.
Jev Tools & CLIs#community#jevbest#kotlin
Community
Liyucheng1997/332_lab-jev-chatKotlin
Liyucheng1997/332_lab-jev-chatKotlin137GitHub stars
Unofficial agent skill that teaches coding agents to design for Jev: typed questions, calibrated confidence, and a short code sketch per pattern, plus links to more than 150 community projects indexed by shape.
Jev Agents & MCP#community#jevbest
90GitHub stars
A faster inference backend for Open-Jev's local server: same request format and same 27B bf16 weights, but the forward pass is replaced by hand-written CUDA kernels, a prefix tree and CUDA Graphs. Needs an existing Open-Jev install and the model weights.
Jev Demos & Experiments#community#jevbest
Community
lyuyiqi/open-jev-fastCuda
lyuyiqi/open-jev-fastCuda165GitHub stars
An unofficial changelog for Earth that renders recent reporting as game patch notes. A scheduled GitHub Actions job collects stories, Groq picks headlines for worldwide relevance and writes the patch titles, and the result is committed as saved editions the site, API and RSS read.
Jev Tools & CLIs#community#jevbest
Community
byalex33/changelog.earthJavaScript
byalex33/changelog.earthJavaScript116GitHub stars
Stanley is a CLI where you describe a code-review request in plain language and Jev routes it to one of ten bounded workflows. Each workflow is deterministic code that gathers bounded evidence and asks Jev fixed-choice questions per hunk; unmatched requests go to the Pi agent.
Jev Agents & MCP#community#jevbest
Community
devagrawal09/jev-codeTypeScript
devagrawal09/jev-codeTypeScript118GitHub stars
A Claude Code skill that moves bulk judgment off Claude and onto Jev. You filter files, classify items, rank candidates or locate lines, and it returns typed verdicts, a shortlist with borderline markers, and a receipt of the tokens Claude did not read.
Jev Agents & MCP#community#jevbest
Community
UditAkhourii/quicksilverJavaScript
UditAkhourii/quicksilverJavaScript56GitHub stars
R.A.I.N. Lab is a local-first research environment. Four constrained perspectives investigate a question, quoted spans are checked against a local paper corpus, and experiments are pre-registered with host code, not a model, deciding pass, fail or inconclusive.
Jev Tools & CLIs#community#jevbest
Community
topherchris420/james_libraryRust
topherchris420/james_libraryRust75GitHub stars
CaptainCore is a Go CLI built on Cobra that manages WordPress sites over SSH and WP-CLI: Restic backups to B2, git-backed quicksaves, parallel uptime checks, updates with before/after diffs, and a REST plus WebSocket server for remote dispatch.
Jev Agents & MCP#community#jevbest
Community
CaptainCore/captaincoreGo
CaptainCore/captaincoreGo124GitHub stars
Prism is an autonomous liquidity agent for Solana concentrated liquidity pools, currently Meteora DLMM. Every ten minutes it recalls past outcomes, reads pool state, scores volume authenticity and decides HOLD, REBALANCE, EXIT or ENTER behind a risk gate.
Jev Tools & CLIs#community#jevbest
87GitHub stars
WindTunnel is a benchmark harness for browser agents. It runs the same tasks on the same self-hosted Docker sites across every interaction mode, WebMCP, code execution, DOM, accessibility tree and screenshots, and scores the resulting application state instead of judging the run.
Jev Practices & Patterns#community#jevbest
Community
nekuda-ai/WindTunnelHTML
nekuda-ai/WindTunnelHTML501GitHub stars
A curated link list for the System One and Jev ecosystem: TypeSafe's own launch material, open-weight decision models, benchmarks and commentary, with each entry annotated by what its authors measured.
Jev Guides & Articles#community#jevbest
Community
OmniJev/awesome-jevJavaScript
OmniJev/awesome-jevJavaScript73GitHub stars
An MCP memory server for coding agents: decisions, fixes and session summaries live in a local SQLite store, and recall fuses BM25, locally computed dense embeddings, fuzzy matching and a knowledge graph.
Jev Agents & MCP#community#jevbest
75GitHub stars
A Node package that distils Jev-style typed answers into small local classifiers, trained either from saved labels or from a Jev teacher, then served in Node or a browser worker.
Jev Demos & Experiments#community#jevbest
Community
AndrewPrifer/jimothyTypeScript
AndrewPrifer/jimothyTypeScript61GitHub stars
The model-integration layer for the Milvus vector database, shipping adapters for embedding and reranker models from hosted providers, Jev among them, plus local backends.
Jev Integrations & Adapters#community#jevbest
Community
milvus-io/milvus-modelPython
milvus-io/milvus-modelPython63GitHub stars
Feather Wand, a JMeter plugin adding multi-model chat, an AI CLI terminal and an agent mode that edits your test plan through 21 tools, with optional Jev routing to narrow the toolset.
Jev Agents & MCP#community#jevbest
Community
QAInsights/jmeter-aiJava
QAInsights/jmeter-aiJava64GitHub stars
Turns a Playwright trace into a narrated demo video through a chainable pipeline - speed control, subtitles, TTS, click and cursor overlays, zoom - with ffmpeg doing the render.
Jev Demos & Experiments#community#jevbest
430GitHub stars
Serves Jev-style decision checkpoints through vLLM on Linux, with an MLX preview for Apple Silicon, exposing Choice, Noul and Score answers over HTTP.
Jev Integrations & Adapters#community#jevbest
Community
mode-io/vllm-jevPython
mode-io/vllm-jevPython86GitHub stars
Local-first CLI for reading, querying and exporting your own WeChat data on Windows and Linux, with favourites search, Official Account digests, a RAG knowledge base and MCP wiring.
Jev Agents & MCP#community#jevbest
Community
zhuobichen/weflow-cliTypeScript
zhuobichen/weflow-cliTypeScript86GitHub stars
Open-source workbench for quant research, office work and futures execution, where a JEV workspace watches markets through TypeSafe Jev against simulation accounts.
Jev Tools & CLIs#community#jevbest
Community
quantskills/QuantStudioJavaScript
quantskills/QuantStudioJavaScript86GitHub stars
Experimental oxlint plugin that turns plain-English yes/no questions into lint rules, answered by TypeSafe Jev with a probability you threshold.
Jev Agents & MCP#community#jevbest
112GitHub stars
Rust CLI that searches a live source tree by describing what you want, returning files and line ranges with calibrated probabilities instead of building an index.
Jev Agents & MCP#community#jevbest
Community
can1357/jegrepRust
can1357/jegrepRust70GitHub stars
Research toolkit that turns embedding models into Choice, Score and Noul decision models, covering data synthesis, LoRA fine-tuning, serving, benchmarking and a playground.
Jev Demos & Experiments#community#jevbest
Community
HITsz-TMG/JevEmbedPython
HITsz-TMG/JevEmbedPython65GitHub stars
Non-commercial research harness that turns a branching narrative into decision-tree JSON so any OpenAI-compatible model, Claude Code or Jev can play it node by node.
Jev Demos & Experiments#community#jevbest
Community
Baba88611/detroit-ai-playerPython
Baba88611/detroit-ai-playerPython64GitHub stars
Elixir library for agents, graph workflows and deep agents, built on OTP supervision with Ecto and ETS boundaries plus adapters and tracing instead of a Python runtime.
Jev Integrations & Adapters#community#jevbest
Community
caudena/beam_weaverElixir
caudena/beam_weaverElixir67GitHub stars
Chat-host plugin that turns a long press on a message into judgments for intent, emotion, urgency and reply posture, with a per-conversation relationship that changes how the answer reads.
Jev Tools & CLIs#community#jevbest
Community
Nisaka520/JevIntentJava
Nisaka520/JevIntentJava147GitHub stars
Apache-2.0 open-weight stand-in for a hosted decision model: Qwen3.5-4B with a distilled adapter scores noul, choice and score questions through a systemone-shaped server, with no generated tokens.
Jev Demos & Experiments#community#jevbest
Community
allebee/jevk5Python
allebee/jevk5Python56GitHub stars
macOS agent loop that moves a real USB HID mouse and keyboard under a vision model, with an experimental decision-model lane picking the next operation and screen target from an element table.
Jev Demos & Experiments#community#jevbest
Community
affirmitv/ghosthandsPython
affirmitv/ghosthandsPython51GitHub stars
Docker Compose log intelligence stack: Rust ingest and retrieval crates over ClickHouse and Qdrant with a Next.js dashboard, where the decision model is an optional query classifier.
Jev Tools & CLIs#community#jevbest
Community
YEDASAVG/StratumRust
YEDASAVG/StratumRustStart here with Jev
Hand-picked entries the maintainers recommend first, from official primitives to community tools.
Published evaluations of four automation workflows, security incidents, agent trace observability, invoice processing, and customer service, comparing Jev and frontier LLMs as structured workflows versus single prompts.
Jev Practices & PatternsDocs#official#benchmarks#evaluation
Official
6GitHub stars
.NET SDK for the System One API with typed question sets, HttpClientFactory and dependency-injection wiring, plus Microsoft.Extensions.AI guardrail, routing, tool, and evaluator adapters.
Jev Repos & SDKs#community#sdk#csharp
Community
Hawxy/TypeSafeAI.NetC#
Hawxy/TypeSafeAI.NetC#0GitHub stars
A NativeAOT-ready .NET SDK generated from TypeSafe's OpenAPI definition, with typed question sets, batching, dependency injection, and Microsoft.Extensions.AI integrations.
Jev Repos & SDKs#community#sdk#csharp
Community
tryAGI/TypeSafeAIC#
tryAGI/TypeSafeAIC#Newest Jev resources
The latest additions to the directory, newest first.
Watch: Jev in action
Walkthroughs, tests, and demos from the community.
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.
Discussions about Jev
Threads from Reddit and Hacker News about building with Jev.
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 hand-picked 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 Jev?
Jev is TypeSafe AI's first System One model. It 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, so 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 hand-picked, 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 2231 entries from 148 source sites, last updated Oct 12, 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. 2231 of the 2231 entries carry one today.
For the canonical details, read the official TypeSafe docs and the API reference.
From the Jev community
Posts from builders shipping with Jev right now.