AppitStudio/awesome-jev

Awesome Jev

Discover Jev-powered apps, developer resources, and runnable decision examples.

Jev is TypeSafe AI's System One model: give it state and typed questions, then use the returned choices, scores, and probabilities in your code. This independent community directory collects applications that use Jev, resources for developers, and small, inspectable workflows to learn from.

Explore Jev-powered apps · Share your app

Try the beta web UI at JevList. Explore the projects in this directory through a searchable web interface. We're continually improving the experience—take a look and let us know what you think!

Contents

• Explore Jev with our skill
• Start here
• Explore practical use cases
• Official SDKs and tools
• Community projects
• Apps powered by Jev
• Browse the project directory
• Tools and integrations
• Computer and browser use
• Starter projects
• Reference project
• Patterns and cookbooks
• Routing and classification
• Retrieval and verification
• Extraction and structured data
• Model behavior and evaluation
• Contributing

Explore Jev with our skill

Use Awesome Jev Guide to understand Jev and explore solutions that fit your needs. Describe your workflow in plain language, and your coding agent will help you choose an example, adapt a project, or build a suitable starter—with guided setup along the way.

1. Install the skill. With Node.js 22+ installed, run this in your project directory:

npx skills add AppitStudio/awesome-jev --skill awesome-jev-guide

Select your coding agent when prompted. For Codex, you can add --agent codex. No TypeSafe account or API key is needed to explore ideas or run the offline examples.

2. Open your coding agent in that project and try a prompt.

New to Jev? Start here:

Use awesome-jev-guide. Explain Jev simply, help me understand what I can
build with it, and walk me through the easiest example. I don't have
an API key yet.

Have a workflow in mind? Fill in the brackets:

Use awesome-jev-guide. Today I [describe the work I do manually].
I want to [describe the result]. I use [language, framework, or tools].
Help me find the best starting point in this repo and explain what
needs adapting. Ask me anything essential that's missing.

Ready to build?

Use awesome-jev-guide to build a small starter for [my workflow] using
[my stack]. Start with a working offline demo, explain what I should
customize, then guide me through API-key setup and a first live check
when I'm ready.

3. Follow the next step together. The guide uses current TypeSafe documentation and explains what already works, what needs building, and how to handle uncertain results. When you want live access, it walks you through private key setup—never paste a key into chat.

See the full onboarding guide for installation options, demos, and setup details.

Start here

Explore what you can build — choose a real implementation by the result you want, then follow its guide, worked example, and setup path.

• Introduction - Understand Jev's state-and-questions interface and its three decision primitives.
• Official quick start - Make a first request using Python or HTTP.
• Run an example locally - Try a complete workflow with synthetic mock responses, without an account, an API key, or package installation.
• Choose a decision pattern - Match a task to Choice, Score, or Noul and define what happens when the result is uncertain.
• HTTP API reference - Check the wire format, authentication, answer fields, and error responses.

Official SDKs and tools

These resources are maintained by TypeSafe.

• Agent skill - Give a coding agent the official API context and guidance for designing narrow decision questions.
• JavaScript SDK - JavaScript and TypeScript client that infers answer types from the supplied questions.
• Python SDK - Synchronous and asynchronous clients with typed answers and configurable retries.
• System One Adapter - Run a similar typed-question interface against other LLM providers for comparisons; those responses do not come from Jev.

Community projects

Browse the project directory for separate app and tool directories, each with full project pages covering use cases, setup, examples, limitations, and review evidence. The links below still take you directly to the upstream projects.

Checks are tied to reviewed versions; see each page and the validation scope. Mocked tests and reported live smoke checks do not establish model quality on your workload.

Apps powered by Jev

Applications with a user-facing workflow powered in part or entirely by Jev. The full app directory shows platforms, access requirements, and Jev's specific role. Tags distinguish source access from pricing; commercial and closed-source apps can qualify. Makers are welcome to submit their own apps.

• Apparite (jev2ui) - Open source · Free source build · BYOK. Local design-mock lab: TypeSafe Jev chooses IA/anatomy; Gemini writes copy; code assembles A2UI-inspired mocks. Project guide.
• Focus - Open source · Free source build · BYOK. Browser extension that classifies domains as productive or distracting with TypeSafe Jev via OpenRouter Decisions and blocks distracting navigations. Project guide.
• Hx - Open source · Free source build · BYOK. Clinical note checklist that ticks items against clauses from the note using TypeSafe Jev (never generates text). Project guide.
• Jev Anti-Spam Bot - Open source · Free source build · BYOK. Self-hosted Telegram bot that deletes high-confidence spam using TypeSafe Jev Noul signals, with fail-open errors. Project guide.
• Jev Call Screener - Open source · Free source build · BYOK. Self-hosted call screening: TypeSafe Jev classifies caller transcripts; Go policy forwards or rejects (Twilio adapter; fail-open defaults). Project guide.
• Jev for Chrome - Open source · Free source build · BYOK. Chrome extension that drives your current tab with TypeSafe Jev (community port of jev-ultrafast); separate text model for typing. Project guide.
• Jev Mail Classifier - Open source · Free source build · BYOK. Classifies IMAP inbox messages with Jev category judgments, then tags, moves, flags, or notifies from a local Textual TUI and CLI. Project guide.
• Jevmail - Open source · Free source build · BYOK. Local read-only Gmail triage into Needs reply/Updates/Promos/Sales/Spam with TypeSafe Jev over the Vercel AI Gateway. Project guide.
• Jev Moderation Bot - Source unverified · Pricing unverified · BYOK. Self-hosted Discord bot using Jev message classifications for automatic deletion, escalating timeouts and moderator-requested activity profiles. Project guide.
• JevEye - Open source · Free source build · BYOK. Browser vision probes report calibrated facts; TypeSafe Jev plans probes and judges the text fact sheet (never pixels). Project guide.
• Jev Radar - Open source · Free source build · BYOK. Local research workspace where Jev steers investigation over public sources with inspectable decisions and optional text-model drafting. Project guide.
• Jev Search - Open source · Pricing unverified · BYOK. Selects search sources and filters, then ranks retrieved links using Jev and Search1API. Try app · Project guide.
• Jev Social - Open source · Free source build · BYOK. Local UI/CLI where TypeSafe Jev (via OpenRouter) chooses read-only Instagram/TikTok/LinkedIn research ops executed by socai in Chrome. Project guide.
• JevSlop - Open source · Free source build · BYOK. Scores note articles for AI-slop writing patterns with TypeSafe Jev (BYOK). Try app · Project guide.
• JEV Document Classification - Open source · Free source build · BYOK. Local-first folder filer: TypeSafe Jev (Vercel AI Gateway) chooses category/confidentiality/injection/subject; audit preview and undo. Project guide.
• Jevmeter - Open source · Free source build · BYOK. Renders video captions, gauges and highlights from Jev judgments about transcript sentences; these judgments are not fact-checks. Project guide.
• Jev Voice - Open source · Free source build · BYOK. Hands-free macOS voice assistant: local whisper.cpp plus one Jev call per command to select typed actions and arguments. Project guide.
• Live Jev - Open source · Free source build · BYOK. Early macOS Ableton Live controller: hotkey bar + TypeSafe Jev picks typed mixer/device actions from short EN/JP phrases. Project guide.
• macbrow - Open source · Free source build · BYOK. Experimental macOS voice assistant using Jev to route commands to AppleScript tools and Chrome browser tasks. Project guide.
• Notra - Open source · Commercial · Paid. Uses Jev judgments within a broader application for tracking brand mentions and placement in AI answers. Product · Pricing · Project guide.
• PageGrade - Open source · Free source build · BYOK. Chrome extension that grades page sections for clarity, writing, and on-page SEO with TypeSafe Jev via Vercel AI Gateway. Project guide.
• Polymorph - Open source · Free source build · BYOK. Chrome extension that collapses posts matching English rules judged by TypeSafe Jev via OpenRouter Decisions; replace with your media or restore. Project guide.
• QuantDinger - Open source · Free source build · BYOK. Self-hosted AI trading OS with optional TypeSafe Jev pre-trade entry gates; hosted app also available. Product · Try app · Project guide.
• RefGarden - Open source · Free source build · BYOK. Local spatial reference gallery where TypeSafe Jev chooses search phrases and highlights Met/NASA/Cosmos/Archive items from text metadata. Project guide.
• Smart Paste - Open source · Free source build · BYOK. Experimental Chrome extension that uses Jev to select and verify exact source text for web form fields, with paste and undo. Project guide.
• Sponsor Skip - Source unverified · Pricing unverified · BYOK. Locates YouTube sponsor reads with Jev-selected transcript boundaries and optional Deepgram audio analysis, with playback skipping. Project guide.
• Tab Bouncer - Open source · Free source build · BYOK. Chrome extension that rates open tabs for a typed task with TypeSafe Jev (keep noul + kind choice; batches of 120), then closes mismatches. Distinct from Jev for Chrome. Project guide.
• TipTour - Open source · Free source build · BYOK. macOS menu bar app that uses Jev to select desktop click targets from typed requests, alongside a separate Gemini voice mode. Project guide.
• Transcript Lens - Open source · Free source build · BYOK. Next.js (Türkçe UI) YouTube transcript explorer: TypeSafe Jev classifies blocks for kind/value/signals without rewriting text. Project guide.
• TypeSafe Fun AdBlocker - Open source · Free source build · BYOK. Experimental Chrome extension that asks Jev whether heuristically selected DOM elements are ads, then removes or highlights matches. Project guide.
• Unclutter - Open source · Free source build · BYOK. Classifies page clutter with Jev and saves reversible hiding rules for similar pages, with manual analysis by default. Project guide.
• Vibe Check for X - Source unverified · Pricing unverified · BYOK. Chrome extension that uses Jev to score draft X posts and display a verdict, with optional OpenAI media descriptions. Project guide.
• Watermelon - Open source · Free source build · BYOK. Status-update honesty auditor: TypeSafe Jev judges language while code parses slip signals; live demo available. Try app · Project guide.
• Xtags - Open source · Free source build · BYOK. Chrome extension/userscript that tags X posts with TypeSafe Jev intent and risk signals for personal local browsing. Project guide.

Developer projects and integrations

The independent model research category explores related typed-decision interfaces with other models. Their local inference uses those models, and they do not provide official Jev weights.

• Advocaat - TypeScript ask client that batches typed Jev choice, score, and yes/no questions about structured data, with optional Vercel AI Gateway support. Project guide.
• Agent Router - Quota-aware Herdr launcher that uses TypeSafe System One (Jev) to pick Cursor/Claude Code/Codex/OpenCode model and effort after local eligibility rules. Project guide.
• feelings - BAML .feels() / .how() / .matches() typed AI-if methods powered by TypeSafe Jev; upstream licensing unspecified. Project guide.
• ask-jev-skill - Hermes skill that asks TypeSafe Jev for typed Choice/Score/Noul tiebreaks when paths remain plausible. Project guide.
• beam-cli - AgentBeam local monitoring/safety CLI for coding agents, with optional TypeSafe Jev action judging (disabled by default; AGPL-3.0). Project guide.
• bitrate-advisor - Live-stream encoder settings from telemetry/history using TypeSafe Jev (OpenRouter) inside a deterministic safety envelope. Project guide.
• Canny - Claude Code/Codex warden: append-only ledger and deterministic done-gate; optional TypeSafe Jev advises but never alone blocks. Project guide.
• clear-head - Claude Code Stop hook that judges answer claims against session tool evidence with TypeSafe Jev. Project guide.
• Cua jev-use - Composes a bounded Jev chooser with Cua Driver and an independently verified browser fixture. Project guide.
• daf-jev - Composable Python toolkit for TypeSafe Jev: question builders, confidence gates, evaluator, calibration, CLI, and optional MCP server. Project guide.
• dbt_jev - Classify warehouse SQL values with TypeSafe Jev (or OpenRouter→Jev) from dbt macros on DuckDB and ClickHouse. Project guide.
• decision-first - Agent skill that tries TypeSafe Jev on bounded-judgment steps first and documents every attempt in a reusable decision lab. Project guide.
• doc-router - Routes PDF pages between local text extraction and OCR using optional Jev judgments, with a Rust CLI and Python bindings. Project guide.
• demo-expanso-jev - Expanso Edge × TypeSafe Jev demos: fingerprint routine logs locally, ask Jev only on the remainder, route with hold-on-failure and live boards. Project guide.
• Distill - Lightweight coding-agent TUI with TypeSafe Jev (or OpenRouter decisions) for model/effort routing, utility tasks, and retention. Project guide.
• ExcelPilot - Live Excel agent with Qwen planning and TypeSafe Jev for intent routing, tool gating, and claim checks. Project guide.
• Eutrya - CLI-first agent (public alpha) with TypeSafe Jev in the decision loop for attention, candidate rubrics, and research micro-steps; offline eutrya demo. Project guide.
• fast-jev-compaction - Selects tool-call/result pairs to keep, truncate, or remove while preserving retained conversation content verbatim. Project guide.
• Foreman - Supervises Codex workers with Jev assessments and deterministic steering, retry, and verification policy, with a synthetic demo. Project guide.
• git-jev-stage - Classifies Git hunks against a one-sentence staging intent with TypeSafe Jev, then stages confirmed blocks. Project guide.
• Graphlin - Live architecture and activity diagrams for Claude Code or Codex while they explore code, with optional TypeSafe Jev classification. Project guide.
• Grok Bot Jev - Reference router and skill that use TypeSafe Jev to choose reuse/stop/cap/ask-human actions before expensive Grok Bot work. Project guide.
• Hermes Jev Skills - Agent skills and jev CLI using TypeSafe Jev for model routing, memory filtering, compaction, skill selection, triage, and computer/browser action choice on Hermes, Claude Code, and Codex. Project guide.
• hono-jev-router - Experimental Hono router that matches HTTP requests to plain-English descriptions with TypeSafe Jev Noul judgments. Project guide.
• invalidate - Semantic TTL for agent memory: TypeSafe Jev checks every stored fact against new evidence; code marks superseded memories without rewriting text. Project guide.
• is-malicious - Scans source/config/CI files with TypeSafe Jev for deceptive or data-stealing behavior and points to suspicious lines. Project guide.
• J++ - Experimental language and Rust runtime for composing semantic Jev questions with exact methods as values; offline fixtures included. Project guide.
• JCR - Jev Capability Resolver: TypeSafe Jev searches a nested capability tree and returns deterministic command documentation for agents (MCP + harnesses). Project guide.
• jear - Rust Jev-routed client for NEAR AI Cloud inference and IronClaw agents using budget/quality/sensitivity decisions. Project guide.
• jev-align - CLI to build calibrated AI Functions from human labels using TypeSafe Jev evaluation and GEPA optimization. Project guide.
• jev-ci-selector - GitHub Action that asks TypeSafe Jev which descr