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Recent activityA FIELD GUIDE TO JEV / VOL. 01
The best of Jev. Real projects, practical guides and ideas from across the internet.
THE OFFICIAL SIGNAL 4 HIGHLIGHTS
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.
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 announces public access to Jev without a waiting list. The official console is the starting point for trying typed decisions in your own application.
JEVLAB ARTTypeSafe 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.
JEVLAB ARTStart with the Launch Post. Explore four official signals.
714 resources
AI-assisted summaries and translations. Check original sources for context and performance claims.
Browser Use's ultrafast agent: Jev picks the operation and DOM element in one request; a small LLM only writes text when typing is needed.
JEVLAB ART
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Claude Code plugin that replaces the compaction summary with Jev decisions: every tool call and result is scored in one fast request, stale ones are dropped or truncated, everything kept stays verbatim.
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Official sync and async Python client. pip install typesafe-sdk.
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Non-autoregressive decision engine on ModernBERT (151M) with calibrated uncertainty (RLCD), TypeSafe AI Jev benchmark audit, and in-browser WebGPU playground.
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Everyday Stocks Status with Jev.
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A command-line interface for Jev that provides answers and exit codes based on input questions.
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A macOS tool for identifying safe ports to stop, developed as a GitHub project.
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Curated list of official resources and community projects for TypeSafe, System One models, and Jev, with a GitHub Pages site.
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Standalone Android agent for Mobilerun where Jev makes every decision, with a live React studio and an Uber demo.
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Pre-alpha PostgreSQL extension for TypeSafe AI (Jev) categorical classification.
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A Mac voice diary tool that uses Jev for sorting and integrates with Notion.
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Game where Jev competes against LLMs in Pong.
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Hunch is a GitHub tool for code review that applies rules written in plain English to analyze and improve code quality.
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Data extraction for systematic reviews, quoted from the papers. Ask a trial report and its supplements your extraction form or a RoB 2, ROBINS-I, QUADAS-2 or TIDieR template; Jev points at the lines, every answer is a verbatim quote with its page, you check it and export the table. Files stay in your browser.
JEVLAB ARTEnglishSource-linked curation
A developer project that uses Jev as a sensor to control access to agent tools, enhancing security and functionality.
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Claude Code plugin: trim long Bash output with TypeSafe Jev before the model sees it.
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Context-pruning proxy for Claude Code and Codex: Jev judges which history is still needed, measured not claimed. POC here now, heading soon into https://github.com/compozy/compozy.
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A source-backed Jev project directory with a reusable Jev-only GitHub review workflow.
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A curated list of awesome Jev / TypeSafe System One applications, libraries, and resources.
JEVLAB ARTEnglishSource-linked curation
A curated, source-backed list of projects built with Jev, TypeSafe AI's System One model for typed decisions.
JEVLAB ARTEnglishSource-linked curation
A game project involving a penalty shootout against Jev using Render Workflows and Postgres.
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Rust CLI powered by Jev from TypeSafe.ai that ranks agent skills for the next step using live session context. Includes Claude Code hooks, structured JSON, abstention, and local feedback. Requires a TypeSafe API key.
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A developer project providing a local MCP server for running pre-made Jev question packs.
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A developer project that selects applicable rules for Claude, ensuring only relevant information is shown.
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Semantic GitHub PR labels using Jev's typed decisions, with conceptual scope instead of line counts.
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Context curator for Pi agent using Jev technology.
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A mahjong coach that uses Jev to suggest tiles to discard in Japanese.
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A developer project where Jev assists in browsing by selecting actions, with an LLM planning and citing sources.
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A Jev powered LinkedIn recruiting agent. Watch it browse relevant profiles, save links, and review evidence against your hiring brief.
JEVLAB ARTEnglishSource-linked curation
A curated list of Jev use cases, projects, SDKs, and resources. Jev is TypeSafe AI's System One model for fast, typed decisions in software — Choice, Score, and Noul with calibrated probabilities.
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Official drop-in TypeSafeClient replacement backed by OpenAI, Anthropic, and compatible LLM APIs, for comparing Jev against chat models.
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A small open decision model: state + typed questions -> calibrated probabilities. A Jev / System One re-creation on Qwen3.5.
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Typed, confidence-aware agent skill routing with TypeSafe Jev.
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A GitHub project converting agent skills into Oxlint plugins that involve Jev.
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Multi-axis writing quality checker powered by TypeSafe AI's Jev model. Separate named checks, each with its own verdict and confidence.
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Daf-jev: composable Python toolkit for TypeSafe's Jev (System One) decision API — question builders, confidence gates, evaluator, calibration, CLI, MCP server, agent skill.
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A developer project generating paintings based on Jev's pixel probability calculations, collected for the tools shelf.
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100% free ₹0 agent-first SEO & GEO CLI suite and MCP server in Rust replacing Semrush and OpenSEO via DuckDuckGo and TypeSafe Jev System One.
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WXT browser extension: Jev-powered page clutter removal with reusable template rules.
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A developer project using Jev for plain-language MCP tool calls without an LLM.
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5–10x faster browser operations: Jev clicks, Codex thinks and verifies. Built at EZCollegeApp.
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Jev-assisted file retrieval and request caching for faster Pi workflows.
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A developer project offering 110 interactive use cases, games, and scenarios with editable prompts.
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Jev play Tetris in real-time against other AI models.
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Camera-only autonomous drone in MuJoCo with a small judgment model (TypeSafe Jev) in the loop at 2.5Hz.
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Proof of concept MCP for Typesafe's new Jev AI model.
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A developer project for the agents shelf featuring a local MCP gateway with Jev tool discovery and a dashboard.
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A fire evacuation simulation where each person makes Jev-style decisions.
JEVLAB ARTEnglishSource-linked curation
Jev decision layer for agents: MCP server, embeddable DecisionModel library, and an escalate-only Claude Code plugin (TypeSafe AI's Jev).
JEVLAB ARTEnglishSource-linked curation
Browser automation where an LLM plans and Jev (Typesafe System One) decides. Library, CLI and MCP server.
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A developer project for agent classification and selective reading using an agent plugin and MCP tool.
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A developer project for the games shelf, where Jev improvises piano with proper questions.
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A skill for writing and improving programs that call Jev, TypeSafe's System One model.
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MCP server that puts TypeSafe Jev on the coding loop in Cursor, Codex, and any MCP client.
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Agent skill: design judgment-assisted systems with TypeSafe Jev (System One). Maps Choice/Score/Noul onto decision theory, reranking, and routing. Composition algebra, question design, validation gates. MIT.
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Agent-ergonomic CLI for TypeSafe's Jev: fast calibrated judgments (pick, rate, check, rank, triage, guard) from the shell.
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Open alternative to Jev: typed, calibrated decisions from any open-weights LLM in one forward pass (HF + vLLM), with benchmarks.
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Systematic software development framework for AI coding agents upgraded with TypeSafe Jev System One typed decisions.
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Typesafe's jev as a "fuzzy linter". give your code an ocular patdown.
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Official agent skill for Claude Code, Codex, and compatible agents: primitives, patterns, and how to structure evaluations.
JEVLAB ARTEnglishSource-linked curation
A developer project offering semantic code search for coding agents, benchmarked on SWE-bench Lite.
JEVLAB ARTEnglishSource-linked curation
Guardrails for Pi built on pi-typesafe that steer the agent instead of interrupting you: Jev judges irreversible and off-task tool calls, detects stuck loops, checks unverified done claims, flags slop.
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⚡ Ultra-fast, low-cost intelligent task classifier and 3-tier routing engine powered by TypeSafe Jev (System One).
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TypeSafe Jev as the pi coding agent's quiet decision layer.
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🚀 Blazing-fast native macOS menu bar companion for Notion. Pure Swift & SwiftUI (<3MB), 8 languages.
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Fast structured Android control loops with TypeSafe Jev and Mobile MCP.
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Calibrated alignment verifier for LLM responses and agent plans — powered by Jev.
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Typesafe.ai System One Model Jev navigating a Neo4j graph by using a classifier over neighbouring relationships.
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Browser automation with Jev (TypeSafe) as decision model.
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Home Assistant integration for TypeSafe Jev. Ask a question about your house and get a probability, a choice or a score as an entity.
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A Next.js brick breaker whose paddle is controlled in real time by TypeSafe AI's Jev model. Built with Claude Code.
JEVLAB ARTEnglishSource-linked curation
A verified, community-maintained catalog of 485 open-source projects built with Jev.
JEVLAB ARTEnglishSource-linked curation
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4 HIGHLIGHTS
4 clicks / 7d
Agents & browsers
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LAB PICK
Markets & experiments
Tools & apps
Decisions & routing
Games & real time
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