Jev 101
English ▾

Featured Jev Tools and Projects

168 resources
Official

typesafe-sdk-js

typesafe-ai/typesafe-sdk-js

Official TypeScript and JavaScript SDK with inferred answer types.

Official

skills

typesafe-ai/skills

Official agent skills for building and evaluating System One workflows.

Official

Models and aliases

docs.typesafe.ai

Version IDs, current limits, pricing, and the distinction between stable and preview aliases.

Official

Confidence

docs.typesafe.ai

Distinguishes Choice/Score confidence from answer probability; Noul has no separate confidence field.

Official

Jev 1.13 jaggedness

docs.typesafe.ai

First-party limitations covering arithmetic, dates, distractors, adversarial state, and structural inconsistencies.

Provider

Cloudflare AI

developers.cloudflare.com

Provider-maintained `typesafe/jev` integration accepting state and typed questions.

Provider

OpenRouter

openrouter.ai

Provider listing for `typesafe/jev-1.13`, alongside the moving `typesafe/jev-latest` alias.

Provider

Vercel AI Gateway

vercel.com

`typesafe-ai/jev` through AI SDK's experimental `evaluate` interface; its Boolean primitive corresponds to TypeSafe's Noul.

Community

advocaat

pithings/advocaat

Small type-safe client for asking Jev questions about datasets.

Community

jev

dannote/jev

Elixir/OTP client designed around GenServer replies and pattern matching.

Community

jev-axi

shiftynick/jev-axi

CLI for picking, rating, checking, ranking, triaging, and guarding from the shell.

Community

jev-dsl

inanna-malick/jev-dsl

Early-alpha Haskell DSL that encodes typed question packets and decodes answers; HTTP transport is left to the caller.

Community

jev-mcp

blakestone-x/jev-mcp

MCP server exposing classify, score, check, match, and screen tools.

Community

jev-mcp

BYK/jev-mcp

An eval-first MCP server for Jev, that returns typed judgments (noul, choice, score) with probabilities instead of generated text.

Community

jev-shell-history

mrnugget/jev-shell-history

Ranks existing zsh history entries for inline completion; accepting a suggestion does not execute it.

Community

Jevbridge

gamesonrblx/Jevbridge

ACP/MCP adapter for using Jev alongside coding and chat models.

Community

jevclient

AboveColin/jevclient

Async Python client for typed Jev questions and probabilities.

Community

jevr

simxnherrera/jevr

Native R client for typed questions and provider-independent answers through TypeSafe or OpenRouter.

Community

laravel-typesafe-jev

Butochnikov/laravel-typesafe-jev

Laravel integration with typed responses, async requests, and testing fakes.

Community

ruby_decision_model

obie/ruby_decision_model

Ruby client with standard-library transport for TypeSafe and OpenRouter decision endpoints.

Community

typesafe-sdk-java

Premo-Cloud/typesafe-sdk-java

Community Java 17 client for Choice, Score, and Noul, with an optional Spring Boot starter.

Community

zod-jev

jomatsu/zod-jev

Pairs local Zod shape validation with Jev semantic validation.

Community

agent-router

nidhi-singh02/agent-router

Pre-release Herdr integration that filters eligible coding models by quota and policy before Jev ranks them.

Community

blink

ellipsis-dev/blink

Navigates file and directory names with Jev-guided walkers to find codebase paths for a natural-language query.

Community

Canny

qkal/Canny

Evidence ledger that challenges unsupported "done" claims from coding agents.

Community

commit-miner

devanshbatham/commit-miner

Classifies Git diffs and commit messages into change types and candidate security-fix/CWE labels for inspection.

Community

foreman

thruwire/foreman

Software-factory supervisor that uses Jev to keep coding agents on task.

Community

is-malicious

luantak/is-malicious

Scans source, configuration, build, and CI files with Jev, then reports suspicious behavior and implicated lines before the code is run.

Community

jev-guard

leepokai/jev-guard

Cross-agent tool-call risk scoring with allow, ask, and deny outcomes.

Community

jev-pref

doeixd/jev-pref

Linter that has Jev check code changes against project preferences from `jev-pref.json` and feeds findings back to coding agents.

Community

jev-router

gargpratyush/jev-router

Chooses a model for each fresh Claude Code or Codex turn while wrapping the existing CLI.

Community

jevwire

Brainwires/jevwire

MCP tools, an embeddable decision library, and advisory or restrictive Claude Code hooks; judgments do not grant native permissions.

Community

opencode-jev-orchestrator

aaronshaf/opencode-jev-orchestrator

Keeps an OpenCode parent model fixed and uses Jev difficulty judgments to delegate harder turns to temporary subagents.

Community

perch

lakeday-org/perch

Semantic code linter that evaluates code units against configurable Jev questions.

Community

pi-jev

y0usaf/pi-jev

Measured tool-call gate and general typed decision layer for the Pi coding agent.

Community

pi-warden

DevMortimer/pi-warden

Pi extension that judges rule compliance, risky actions, stuck loops, and completion claims; enforcement depends on the hook and policy.

Community

skillbox

kitze/skillbox

Self-hosted skill library with optional Jev relevance recommendations over an authorized catalog.

Community

skillranker

Dicklesworthstone/skillranker

Rust CLI that ranks agent skills against live session context and can abstain.

Community

supercov

supercorp-ai/supercov

Scores source files so coding agents can prioritize code-quality work.

Community

wakegate

shitianfang/wakegate

Experimental gate where Jev decides whether a timer or incoming event is worth resuming a sleeping agent's LLM; code skips only when Jev is confident and always wakes on user messages, errors, and a skip limit.

Community

fast-dev-compaction

leonaaardob/fast-dev-compaction

Codex port that restores Jev-selected verbatim history around native session compaction.

Community

fast-jev-compaction

tamaratran/fast-jev-compaction

Claude Code plugin and library that score tool-call/result pairs for deletion or truncation while retaining selected text verbatim.

Community

pi-fast-jev-compaction

joelhooks/pi-fast-jev-compaction

Pi extension that prunes stale tool history and leaves summary compaction to Pi when pruning is insufficient.

Community

pi-jev-compact

ilkerulusoy/pi-jev-compact

Selective, verbatim context compaction for Pi using Jev model.

Community

pi-jev-context

kevinpita/pi-jev-context

Opt-in Pi extension that filters older messages from model requests while preserving the original session history.

Community

winnow

GhalebDweikat/winnow

Judges tool results before admitting them into Claude Code context.

Community

yoshi

compozy/yoshi

Experimental Claude Code/Codex proxy that uses Jev to prune request context while preserving tool-call protocol structure.

Community

jev-browser-use

wy-coliney/jev-browser-use

Codex browser skill that uses Jev for navigation and target selection while Codex handles text entry and outcome verification.

Community

jev-ultrafast

browser-use/jev-ultrafast

Browser agent where Jev selects an operation and compatible DOM target, and a separate LLM supplies typed text.

Community

jev-voice-browser

moritzkremb/jev-voice-browser

Maps partial speech transcripts to browser intents and observed targets, with code deciding whether to act, wait, or ask.

Community

mobile-jev

droidrun/mobile-jev

Android agent using Mobilerun observations and bounded Jev actions; execute mode controls a real device, while the published Uber demo stops before booking.

Community

duckdb-jev

colliber/duckdb-jev

DuckDB extension that exposes Jev judgments as SQL values with return types derived from the declared criteria.

Community

HA-Jev

AboveColin/HA-Jev

Home Assistant integration exposing typed answers as sensors, automation actions, and an Assist conversation agent.

Community

jev-curate

AkashPriyadarshii/jev-curate

Streaming filter and scorer for Parquet and JSONL datasets.

Community

jev-reviewer

choxos/jev-reviewer

Research-document extraction aid where Jev selects and verifies source lines for verbatim quotes; findings require human review and are not clinical decisions.

Community

jev-search

superagents-lab/jev-search

Uses Jev to select search sources and rank Search1API results, returning source links and snippets.

Community

jev-trader

jarrodwatts/jev-trader

Kuru/Monad trading experiment with optional Jev buy/sell decisions; defaults to a mock model and dry-runs without a private key, but configured execution can place real orders.

Community

jev-tree

reachjalil/jev-tree

Recursive choice over taxonomies larger than Jev's direct option limit.

Community

jevlogs

reachjalil/jevlogs

OpenTelemetry log triage before more expensive analysis.

Community

jevql

kylemclaren/jevql

psql-shaped client and Go/TypeScript/Python SDKs for vanilla Postgres where Jev makes Noul, Choice, and Score judgements about individual table rows after the plain SQL has run on the server, and the client applies the resulting filter, sort, or group.

Community

jevsql

EugeneBoondock/jevsql

SQL-like filtering, ranking, classification, and scoring with natural-language predicates.

Community

llama-index-jev

WiktorB2004/llama-index-jev

LlamaIndex reranker and selector using Jev Score and Choice answers, with configurable confidence handling.

Community

pg_typesafe

giuliosmall/pg_typesafe

Pre-alpha PostgreSQL C extension exposing Choice, Noul, Score, and batched judgments from SQL.

Community

tax-doc-classifier

kyotofin/tax-doc-classifier

Classifies text-bearing PDF pages into IRS form and page-kind candidates with a confidence gate; document triage, not tax advice, and scanned pages need OCR.

Community

tiershift

iamvatsalpatel/tiershift

Policy-bounded model routing for TypeScript and Python.

Community

heist-one

AbdelStark/heist-one

Browser stealth game where Jev judges guards while deterministic code owns the world.

Community

jev-drone

RomanSlack/jev-drone

Simulated MuJoCo quadrotor with Jev making slower tactical judgments from processed camera observations; deterministic code controls flight.

Community

jev-experiments

dabit3/jev-experiments

Collection of inspectable Jev demos, including scripted support conversations with typed intent, escalation, and suggested-response decisions.

Community

JevPilot

standardagents/jevpilot

Three.js driving simulation where Jev chooses among candidate paths and speeds while local code handles vehicle dynamics and geometry.

Community

JevScape

Skyvern-AI/jevscape

RuneBench-based RuneScape harness that maps Jev choices to a bounded game-action catalog and records tick-level results.

Community

killmyidea

monteduro/killmyidea

Startup-idea evaluator that chooses kill, fix, or ship.

Community

tsai-sc

phyous/tsai-sc

Original StarCraft shareware controlled with recorded Jev action probabilities.

Community

typesafe-mario

fhshaik/typesafe-mario

Super Mario Bros. agent choosing actions from structured emulator state.

Community

typesafe-snake

sorrycc/typesafe-snake

Snake autoplayer with one typed decision per tick and code-generated legal moves.

Community

jevmeter

ChetasLua/jevmeter

Scores every sentence in a video and renders the result as an overlay.

Community

Jevthoven

cocktailpeanut/jevthoven

Symbolic-music studio where Jev chooses plans, instruments, and bar patterns, and code renders editable music and MIDI.

Community

SlidePilot

harshil1712/slidepilot

Experimental Slidev controller that judges speech transcripts for slide completion, with deterministic checks and manual navigation.

Community

Sponsor Skip

trungdq88/youtube-sponsor-detection

Finds sponsor reads in YouTube transcripts or transcribed audio while code owns timestamps and playback skipping.

Community

unclutter

kitze/unclutter

Browser extension that uses Jev to identify page clutter and saves reusable, reversible hiding rules.

Community

Vibe Check for X

RafalWilinski/vibecheck

Chrome extension that scores draft posts and reply context before posting; optional media descriptions come from a separate vision model.

Research

Jev Visual

hr98w/jev-visual

Educational MLX/Qwen vision-language experiment sharing image context across candidate-scoring questions; its probabilities are not calibrated correctness estimates.

Research

Jevlike

vinnylarouge/jevlike

Trainable encoder and option-attention head for variable candidate sets, with separate visual game experiments.

Research

LitJev

zhengxuyu/litjev

Reproduction of Jev that turns any Qwen model into a fast decision model, serving the same `/v1/systemone` schema (Choice, Score, Noul) with no training and no generated answer text.

Research

jevmlx

bnsd55/jevmlx

Jev-style parallel constrained decisions for MLX models on Apple Silicon.

Research

kev

jaredpalmer/kev

Qwen2.5-0.5B adapter and decision head with training code, released weights, and parallel typed-question inference.

Research

NanoJev

TianyuCodings/NanoJev

Small parallel-decision model with dynamic candidates, a training pipeline, and recorded game comparisons that include shared code planning.

Research

openjev

zhihz/openjev

Local bilingual probability decisions from context, questions, and candidate answers.

Research

OpenJev (DiffusionGemma)

razorback16/openjev

Independent Jev-compatible server over DiffusionGemma/vLLM; the documented setup requires custom vLLM patches.

Research

openjev-sglang

ekzhang/openjev-sglang

Jev-compatible API endpoint backed by open models and prefill-only inference.

Research

openvons

genai-craft/openvons

Open decision layer for finite options across text, images, and Japanese voice commands.

Research

reflex

kshetrajna12/reflex

Open-model decision engine with shared-state inference, isolated question branches, and a WebGPU demo; browser and Python configurations differ.

Research

SemIf

TheoLeeCJ/SemIf

Formerly OpenJev: an independent study of typed option readout from frozen open models, with shared-prefix experiments and a WebGPU demo.

Research

Simple Jev

featherless-ai/simple-jev

Transforms compatible open-model logits into typed decisions without a separately trained classifier head; model compatibility is constrained.

Research

Verdict-open-jev

Heman10x-NGU/Verdict-open-jev

ModernBERT decision engine with calibrated uncertainty and a WebGPU playground.

Community

Janus

FirasSX914/Janus

Measures when to use Jev versus other models and routes accordingly.

Community

jev-behavior-study

RINNECODER/jev-behavior-study

Independent synthetic-task study of Jev 1.13.0 framing sensitivity and failures, with raw responses and offline report checks.

Community

jev-eval

4esv/jev-eval

Independent Jev versus GPT-5.6 Terra comparison on three labeled classification tasks, reporting accuracy, calibration, latency, and cost.

Community

jev-eval-agent

vinilana/jev-eval-agent

Compares LLM tool selection with Jev routing in a personal-assistant harness containing 100 mocked tools.

Community

jev-korean-benchmark

mahlernim/jev-korean-benchmark

Small Korean/English sample study with recorded responses, including medical-text questions; not a clinical validation.

Community

jev-search-rerank-eval

zhuyansen/jev-search-rerank-eval

Chinese/English retrieval evaluation comparing Jev reranking with lexical, embedding, and fusion baselines, including judge-circularity analysis.

Community

jevcal

abhixhek/jevcal

Fits and drift-checks confidence thresholds against labeled data.

Community

Building with Jev

dbreunig/building-with-jev-skill

Community agent skill covering question design, state preparation, confidence thresholds, and debugging decisions.

Official

Date extraction

docs.typesafe.ai

Official pattern separating typed extraction from date validation and arithmetic in code.

Official

Parallel questions

docs.typesafe.ai

Official worked example of evaluating many questions over shared state in one request.

Official

Skill suggestion

docs.typesafe.ai

Official two-stage workflow that selects a skill and can reject the shortlist.

Community

awesome-jev

hellogumbo/awesome-jev

Large community directory with a searchable companion site.

Community

awesome-jev-typesafe

valentynkit/awesome-jev-typesafe

CC0, awesome-lint clean, sorted by what you would install, with a short know-before-you-build section on the limits.

Community

jev-go

Gaurav-Gosain/jev-go

Go client for TypeSafe's System One API and its model Jev: typed judgments and calibrated probabilities instead of generated text

Community

jev-go

Stumble/jev-go

An independent Go SDK for TypeSafe AI's Jev / System One API.

Community

swift-typesafe

ainame/swift-typesafe

Swift 6.4 SDK for TypeSafe AI, following the Python SDK's 0.6.0 API.

Community

typesafe_sdk

nshkrdotcom/typesafe_sdk

typesafe_sdk is the Elixir SDK for TypeSafe AI and its first System One model, Jev.

Community

typesafe-ai

Twister915/typesafe-ai

typesafe-ai brings TypeSafe's System One evaluation API into Rust as small, typed judgments that fit inside ordinary application code.

Community

typesafe-ai-rs

gilljon/typesafe-ai-rs

An independent Rust client for the TypeSafe AI System One API, maintained at gilljon/typesafe-ai-rs.

Community

typesafe-rs

AbdelStark/typesafe-rs

Evaluate a state against named questions (noul, choice, score) and get one typed answer per question.

Community

typesafe-sdk-go

Tangerg/typesafe-sdk-go

Go SDK for the TypeSafe AI API — typed questions in, probability distributions out.

Community

typesafeai-dotnet-sdk

saibimajdi/typesafeai-dotnet-sdk

Community .NET SDK for the TypeSafe AI System One API — typed noul, choice, and score questions with structured, confidence-scored answers. Not affiliated with TypeSafe AI.

Community

zio-typesafe-ai

jamesward/zio-typesafe-ai

A Scala 3 / ZIO library for TypeSafe AI's Jev / System One API — a "System One model" that answers typed, atomic questions about a piece of state instead of generating text.

Community

ha-conversation-jev

luxus/ha-conversation-jev

Home Assistant custom conversation agent: Jev (TypeSafe System One, jev-latest) classifies an utterance, then either calls a light service (v0 fast path) or hands off to the SpaceXAI Grok conversation agent.

Community

hermes-jev

keeltrace/hermes-jev

It is built for narrow, typed judgments that should not require the main generative model to improvise an answer: routing, ranking, verification, multi-question assessment, tool gating, and context-value decisions.

Community

Jev MCP

jkudish/jev-mcp

MCP server that uses TypeSafe Jev for claim verification, content screening, and semantic candidate ranking.

Community

jev-browser

Ying-Kai-Liao/jev-browser

Browser automation where an LLM plans and Jev (Typesafe System One) decides. Library, CLI and MCP server.

Community

jev-ego

romaluev/jev-ego

TypeScript browser agent for ego lite — Jev Ultrafast's indexed action space, without Chrome, Playwright, or Browser Harness.

Community

jev-starter

hamakyo/jev-starter

Typed, policy-driven decision workflows on top of TypeSafe AI Jev: confidence routing, fallbacks, evaluation, and RAG patterns for TypeScript apps.

Community

typesafe-ai-rails

GenieRobot/typesafe-ai-rails

Community Rails integration for TypeSafe AI's System One API, built on the community typesafe-sdk Ruby gem.

Community

Jev Review Action

fatwang2/jev-review-action

Configurable GitHub Action using Jev to review directory submissions and classify pull requests, with evidence links and template-generated comments.

Community

jev-code

devagrawal09/jev-code

jev-code is a command-line toolkit that coding agents can delegate judgment-heavy work to.

Community

jev-git

AkashPriyadarshii/jev-git

Sub-second Git pre-commit and pre-push reflex gate that screens staged diffs for secrets and destructive commands using TypeSafe Jev.

Community

jev-scout

AkashPriyadarshii/jev-scout

Zero-hallucination open-source repo and crate scout powered by TypeSafe AI Jev System One scoring.

Community

jev-seo

AkashPriyadarshii/jev-seo

Zero-cost, agent-first SEO & Generative Engine Optimization (GEO) search radar CLI suite and MCP server powered by DuckDuckGo and TypeSafe Jev System One.

Community

jev-superpowers

AkashPriyadarshii/jev-superpowers

Systematic software development framework for AI coding agents upgraded with TypeSafe Jev System One typed decisions, zero-hallucination package vetting, and completion gates.

Community

JevSeek

morcoan/JevSeek

Desktop and CLI coding agent that uses Jev to select the next tool from user intent and recorded execution results.

Community

Leanest

baronunread/leanest

Local-first test selector that uses TypeSafe Jev semantic judgments to decide which tests are safe to skip for a given code change, dropping straight into CI via its bundled GitHub Action.

Community

TypeSafe AI Playground

markjaquith/typesafe-ai-playground

Rust CLI with TypeSafe Jev experiments for PHI detection, code-comment review, tone analysis, and classification.

Community

hev reranker

hev/reranker

Python library using Jev Noul judgments to score candidate documents for query relevance, then sort or filter the results.

Community

neo4jev

jexp/neo4jev

Neo4j graph navigation demo that uses TypeSafe Jev to select relationships and check goals during beam search.

Community

Jev-Trades

zadescoxp/Jev-Trades

A Next.js dashboard for live crypto market data and TypeSafe-powered paper trading.

Community

typesafe-ai-playground

BunsDev/typesafe-ai-playground

A community playground for TypeSafe AI's Jev: edit classification experiments, compare A/B inputs, route conversations, extract document fields, inspect code-policy decisions, and explore games and simulations built around typed model outputs.

Community

UI Generator Instinct Jev

joevidev/ui-generator-instinct-jev

A demo app where the user describes a UI case in free text and Jev (TypeSafe's System One model) answers typed Choice/Noul/Score questions to pick and configure a real shadcn/ui component or page block, never generating code or copy.