A FIELD GUIDE TO JEV / VOL. 01
The best of Jev. Real projects, practical guides and ideas from across the internet.
TypeSafe AI@typesafeaiOFFICIALTypeSafe’s official launch announcement introduces the lab and points builders to Jev. It includes Diogo Almeida’s launch film and original introduction.
TypeSafe AI@typesafeaiOFFICIALTypeSafe highlights Jev’s typed-output approach: applications provide state and questions, then act on probabilities, choices or scores. The linked announcement also covers the Venice API integration.
x.comAnswers your code can useExplore this project ↗TypeSafe AI@typesafeaiOFFICIALTypeSafe announces public access to Jev without a waiting list. The official console is the starting point for trying typed decisions in your own application.
x.comJev opens to everyoneExplore this project ↗
Diogo Almeida@CompleteSkepticLAUNCH POSTDiogo Almeida introduces Jev, TypeSafe’s structured decision model. Watch the launch film and explore the original thread for the model’s approach, examples and author-reported performance.
Four official signals. A fresh starting point on each visit.
94 resources
AI-assisted summaries and translations. Check original sources for context and performance claims.
Kevin GrajedaClassifier that assesses prompt difficulty in real-time, enabling fast mode for simple prompts to enhance user interaction.
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Higgsfield AI 🧩Demo showing Jev selecting the most suitable AI models for video and image generation tasks on Higgsfield.
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Jev evaluates the pacing of a frontier-AI essay written by @DarioAmodei.
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Jiaqi GuA project using Jev for skill routing in an agent system, based on community development.
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Uses Jev to decide which AI model to use before generating output, based on prompt and quality requirements.
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ZachiAn ad blocker extension using AI for real-time classification and removal of ads.
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GitHub project for content moderation with category-specific probability thresholds. Enables automated content filtering.
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YumA community post detailing a dashboard that classifies X posts across eight dimensions using Jev for content research.
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A community post about using Jev for incident triage in Box, returning boolean results with probabilities.
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Runnable Jev examples through OpenRouter for immediate implementation.
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x.comJev enables flexible, type-safe classification as a fundamental programming primitive.
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A GitHub Action using Jev for automated PR triage and classification.
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A setup where Jev selects between different AI models for specific tasks, streamlining model usage in a single terminal.
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vogelA system tested on 1,500 emails for classification effectiveness. Demonstrates potential for automated email management.
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A GitHub project routing tasks by selecting model tier, tools, skill, and effort.
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Marc KöhlbruggeA real-time computer assistant using Jev and local Whisper to process voice input, classify actions, and interact with the screen through a Swift app for accessibility.
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A GitHub project that uses Jev to triage and route posts from the live Bluesky firehose with human oversight.
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OpenRouterJev demonstrated over 5x faster performance than other models in testing.
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Jev is utilized for decision-making processes on Cloudflare, including support routing and risk management.
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Jev is demonstrated as a classification model with practical examples.
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Fayaz AhmedAn image classifier using OCR and Jev processes 900 images in 40 seconds.
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A developer project for lead scoring in Clay using Jev.
github.compromptgtm-shared/clay-jev-people-rankerExplore this project ↗Source-linked curation
Self-hosted AI email classifier for Gmail powered by Jev. Create custom labels, organize your inbox, and filter spam with confidence and cost controls.
github.comilyamk/jev-gmail-ai-spam-filter-and-labelingExplore this project ↗Source-linked curation
An educational Jev-like visual inference experiment on Apple Silicon: shared context, direct candidate scoring, and local visual demos.
github.comhr98w/jev-visualExplore this project ↗Source-linked curation
SabrinaA demonstration of Jev's capability to quickly categorize a large volume of Hacker News posts.
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LlamaIndex reranker + router powered by TypeSafe Jev — typed scores/choices, cheaper than LLM-as-judge.
github.comWiktorB2004/llama-index-jevExplore this project ↗Source-linked curation
Trinay HariA 26-sheet construction plan set was classified in 2.9 seconds using Jev with an LLM pipeline, costing $0.0052 and matching GPT-4.1 and GPT-6 Astra performance.
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A guide on using Jev to route between models and block risky tool calls.
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Hamilton UlmerDuckDB extension that classifies rows in CSV, Parquet, or DuckDB tables with Jev, about 10 seconds per 1,000 rows.
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Open-source Jev-style System One decision model. Gemma 3 270M with a scoring head — fast, calibrated decisions in a single forward pass. No text generation. Inspired by TypeSafe.ai's Jev.
github.comakash-kamat/system-one-gemmaExplore this project ↗Source-linked curation
jev-router (skill). A developer project using Jev to select appropriate models for prompts in coding tasks.
github.comheyman333/jev-routerExplore this project ↗Source-linked curation
Classify your inbox with Jev (TypeSafe's System One model) — tag, move, flag, and notify, all config-driven.
github.comparth-kp/jev-mail-classifierExplore this project ↗Source-linked curation
A prototype that classifies symptoms and updates diagnoses using medical ontologies during live clinical consultations.
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Diffusion-style pixel art out of a classifier: 256 parallel per-pixel Jev questions plus refinement passes.
github.comWizhill05/typesafe-image-diffusionExplore this project ↗Source-linked curation
Screen a folder of CVs with the TypeSafe Jev decision model: typed judgments, an editable policy, free re-scoring.
github.comgtaras7/typesafe-jevExplore this project ↗Source-linked curation
TypeSafe (Jev) vs DeepSeek-flash: side-by-side speed/token/cost/accuracy comparison across invoice extraction, email classification, and reranking.
github.commarkfive-proto/typesafe-vs-deepseekExplore this project ↗Source-linked curation
A community post presents a codebase complexity classifier using Jev, aiming to address overengineered code.
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An optimized inference engine to turn LLMs into Jev-like machines: optimized for quick, lightweight, and accurate decision-making, classification, and scoring.
github.comMintzs/jevifyExplore this project ↗Source-linked curation
Classify Git commit diffs and messages with Jev. Bug fixes, security fixes/CWEs, and change types.
github.comdevanshbatham/commit-minerExplore this project ↗Source-linked curation
MovezAnalyzes 100,000 X posts in 20.4 seconds using 14 yes/no questions per post for viral potential assessment.
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LaneBreak — support ticket priority+routing via TypeSafe Jev.
github.comndolinschi/lanebreakExplore this project ↗Source-linked curation
iagolastA community example demonstrating how Jev can classify company invoices into accounting categories rapidly.
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A resource detailing a test of Jev on 12 real-world scenarios, including speed, cost, and practical applications.
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Not every coding task needs your best model. Experimental Jev-powered model routing for Claude Code — V3 prototype runs today, V4 routes at the task boundary.
github.comMongLong0214/jev-gateExplore this project ↗Source-linked curation
Nick KhamiA demo showing how to make open source models behave like Jev using inference engineering and scoring endpoints for decision-making.
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PulseLane — clinic triage decisions via TypeSafe Jev.
github.comndolinschi/pulselaneExplore this project ↗Source-linked curation
Comment-moderation playground: paste a comment, Jev decides what to do with it.
github.comNorbertBodziony/guard-jevExplore this project ↗Source-linked curation
Eight minimal working examples of TypeSafe's Jev (a System One model) applied to mechanical and electrical engineering: CAD/CAE/CAM routing, FEM result triage, DFM screening, BOM alignment, hallucination-proof extraction. Zero dependencies.
github.comFoadsf/jev-for-engineersExplore this project ↗Source-linked curation
HassanA project classifying 1,018 AI research papers using Jev, achieving low cost and fast processing for organizing academic work.
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Rob HallamSuperX integrated with Jev enables rapid post scoring, analyzing 61 questions per post in under a second with high viral potential prediction accuracy.
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JEV Document Classification enables the rapid and cost-effective classification of text-based documents using AI, leveraging TypeSafe's "System One" model.
github.comCharlyhno-eng/jev-document-classificationExplore this project ↗Source-linked curation
A Jev-powered system that analyzes PDFs page by page to determine which require OCR processing.
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A LangChain package with TypeSafeClassifier for integrating Jev into applications.
pypi.orglangchain-typesafeExplore this project ↗Source-linked curation
Helper n8n community node for Jev by TypeSafe. Classify, route, and score text with questions you define, and get a probability for every answer so unsure items can go to review.
github.comvibe-with-me-tools/n8n-nodes-jevExplore this project ↗Source-linked curation
Riley BrownJev classifies 500 emails quickly and inexpensively, demonstrating its efficiency in processing tasks.
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An open-source project that helps select relevant Claude Code skills by prioritizing frequently used ones through Jev integration.
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Justine MooreJev enables natural language search for Zillow listings, classifying properties by non-standard filters.
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1,800-point thread debating whether typed decisions replace LLM calls for classification, routing, and scoring.
news.ycombinator.comHacker News launch threadExplore this project ↗Source-linked curation
Guardrails for LLM apps in one API call. Prompt injection, jailbreaks, leaks, unsafe content. Built on TypeSafe Jev. MIT.
github.com0xArx/jevegisExplore this project ↗Source-linked curation
Benchmarking TypeSafe's Jev decision model as a cost-efficient LLM router on RouterArena.
github.comTokenTrim/jev-routing-experimentExplore this project ↗Source-linked curation
Nikunj KothariA task using Jev to score 3,000 kids' snacks with multiple criteria in 28 seconds.
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Pre-alpha PostgreSQL extension for TypeSafe AI (Jev) categorical classification.
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Autonomous System-One Triage Engine & Benchmark powered by TypeSafe AI (Jev). 75ms inference, $0 output tokens, and RLCD epistemic safety gates.
github.comsysadarsh/zerosweepExplore this project ↗Source-linked curation
Typed, policy-driven decision workflows on top of TypeSafe AI Jev: confidence routing, fallbacks, evaluation, and RAG patterns for TypeScript apps.
github.comhamakyo/jev-starterExplore this project ↗Source-linked curation
GitHub Action for issue triage that abstains: label, spam, needs-info and duplicate in one call, each applied only above a threshold you set, and nothing at all below it.
github.comemreozyoruk/hushExplore this project ↗Source-linked curation
Fast CVSS scoring from vulnerability descriptions using Typesafe Jev.
github.comRed5d/jev-cvssExplore this project ↗Source-linked curation
Real-time Discord moderation bot: Jev evaluates messages and metadata in parallel to catch phishing, spam, and social engineering with a progressive escalation ladder.
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Marketing analytics platform whose feature flag routes brand-visibility classifiers off an LLM and onto Jev boolean decisions.
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Near-real-time scoring of TikTok and Instagram hooks against about 100 personas.
x.comHook panel A/B testerExplore this project ↗Source-linked curation
A guide explaining Jev's approach to making typed decisions rather than processing text.
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A tool that scores video ad shots in 1.5 seconds using Maxfusion and Jev, processing over 450 ads in under three minutes.
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x.comJev is a System One model on OpenRouter that provides decisions with probabilities.
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4 HIGHLIGHTS
4 clicks / 7d
Decisions & routing
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