Use Cases
What the community is building with Jev, five days in. Stars are point-in-time (2026-09-20) and moving fast. Every entry was checked to exist and to genuinely use TypeSafe's Jev.
Flagship demos
| Project | ★ | What it does |
|---|---|---|
| browser-use/jev-ultrafast | 10.1k | Browser agent: one Jev call picks both action and target element; an LLM is only called to type text. Zürich→London flight booked in 7.1 s end-to-end |
| OpenByteInc/QuantDinger | 11.8k | Open-source AI trading OS with a documented Jev pre-trade decision module |
| vercel/eve | 5.3k | Vercel's agent framework ships Jev as the default model in its evaluate path |
| tamaratran/fast-jev-compaction | 4.5k | Claude Code plugin replacing summary-based compaction with per-item Jev keep/drop decisions — context stays verbatim (156k→62k tokens demo) |
| typesafe-ai/skills | 853 | Official agent-skills package for building with the System One API |
Browser & desktop agents
| Project | ★ | What it does |
|---|---|---|
| Sac-Y/Jev-cu | 391 | Jev picks element/action/risk inside Codex Computer Use — text-only, no screenshots |
| wy-coliney/jev-browser-use | 217 | "Jev clicks, Codex thinks and verifies" — 5–10× faster browser ops |
| jkudish/jev-browser | 164 | Browser-use driven by Jev decisions |
| moritzkremb/jev-voice-browser | 134 | Voice-controlled real browser; intent+target in ~300 ms per spoken word |
| savka777/jev-use | 39 | Mac computer-use via Accessibility API + voice input |
| skeptrunedev/jev-recruiter | 33 | LinkedIn recruiting agent that browses profiles and saves candidates |
| kevinbadi/jev-voice | 27 | whisper.cpp local STT + one Jev call per macOS command |
| Ying-Kai-Liao/jev-browser | 29 | LLM plans, Jev decides; library + CLI + MCP server |
| razaanstha/ulka | 18 | Experimental browser agent via Vercel AI Gateway |
Mobile use — Android / iOS agents & testing
| Project | ★ | What it does |
|---|---|---|
| droidrun/mobile-jev | 248 | Standalone Android agent (Mobilerun): Uber ride SFO→Golden Gate in ~21 s / 9 actions |
| SomeshSampat2/jev-android-super | 0 | On-device Kotlin/Compose agent; "open YouTube and subscribe to MrBeast" in 17 steps / ~32 s, ships an APK |
| antiyro/jevdroid | 3 | Typed Python framework for Android over ADB; Jev reads the accessibility tree, 314 ms median decision latency |
| gokulnair2001/Convoy | 2 | Semantic E2E testing for iOS/Android/web: YAML natural-language steps, Jev matches intent → control |
| jaewgwon/jevis | 1 | Dart package on Flutter integration_test: describe a goal, Jev picks the next action |
| ufec/jev-block-android-ad | 3 | "JevNoiseGate": on-device notification/SMS noise filter, fail-open, codes never uploaded |
| Baran3575/jev-voice-android | 0 | Turkish voice-command app; one parallel Jev call → dial/SMS/alarms, confidence-gated at 0.60 |
| mkruglikov/droidjev | 0 | Screenshot-free emulator clicker porting the jev-ultrafast pattern to ADB |
| Xopher00/jevdevice | 0 | MCP server controlling a real Android phone; Jev picks targets from the live accessibility tree |
| InfamousCube/JevPilot | 1 | Cross-platform computer-use app (Windows + Android APK), released binaries |
| Clueless-Creations/jev-ios-ultrafast | 0 | iOS Simulator runner with step verification and multi-simulator suites |
| aldouus/jevium | 0 | Natural-language UI goals executed via Appium or Chrome |
Games
| Project | ★ | What it does |
|---|---|---|
| fhshaik/typesafe-mario | 289 | Plays Super Mario Bros from structured emulator RAM — no screenshots |
| standardagents/jevpilot | 102 | Three.js driving simulator with Jev autopilot, hosted demo |
| rmalde/minecraft-agent | 75 | Astra plans, Jev controls, with route verification |
| sorrycc/typesafe-snake | 18 | Snake, one Choice per tick — by UmiJS creator sorrycc |
| ickas/battleship-vs-jev | 0 | 60-game study with live probability heatmaps; hybrid Jev ≈ density baseline |
| pokertools-arena | 1 | No-limit Hold'em bench seating Jev vs OpenAI-compatible models |
| atarikcaliskan/jevball | 3 | 3D football where all 22 players are separate Jev calls |
| AbdelStark/heist-one | 6 | Browser stealth game; Jev makes guard judgments while deterministic code owns the world |
More: typesafe-chess · jev-plays-pokemon · tetris-jev · jevs-kitchen-chaos · tsai-civ2
Dev tools & agent infrastructure
| Project | ★ | What it does |
|---|---|---|
| thruwire/foreman | 413 | "Software factory foreman" orchestrating dev work via Jev |
| devagrawal09/jev-review | 376 | Staged code-review workflow + local dashboard driven by Jev judgments |
| gargpratyush/jev-router | 229 | Routes each Claude Code task to the cheapest adequate model |
| NiazMorshed2007/jev-review | 175 | Local-first MCP plugin for continuous quality review |
| lakeday-org/perch | 161 | Semantic code linting with Jev |
| tamaratran/jev-pruner | 119 | Trims long Bash output before the model sees it |
| uehaj/jev-semgrep | 103 | "grep by meaning" with composable AND/OR meaning queries |
| BillionsBobby/JevRouter | 98 | Routes models, tools, and subagents |
| y0usaf/pi-jev | 101 | Decision layer for the Pi agent: tool-call gate + jev_ask |
| vinilana/jev-eval-agent | 95 | Measures steps saved when Jev (not the LLM) picks tools |
| 0xNatoshi/jev-codex-router | 76 | Per-turn model / reasoning-depth routing for Codex |
| Dicklesworthstone/skillranker | 76 | Rust CLI ranking agent skills from live session context |
| mrnugget/jev-shell-history | 68 | Fish-style zsh autosuggestions ranked by Jev |
| vinilana/jev-gateway | 61 | Local gateway where Jev makes tool-choice for Codex/Claude Code/OpenCode |
| w3cj/jev-chat | 49 | Tool-calling chatbot with no LLM — Jev picks intent/tool/args each turn |
| EliaAlberti/jev-rules | 39 | Per-prompt rule selection for coding agents |
| shiftynick/jev-axi | 17 | Agent-ergonomic CLI: gates risky calls, screens injection, triages build logs |
| GhalebDweikat/winnow | 28 | Context sieve judging every tool result before it enters Claude Code's context |
| fatwang2/jev-review-action | 1 | Reusable GitHub Action: Jev reviews PR/submission classifications |
More: jev-lint · commit-miner · jegrep · blink · jev-cli · jeff · yoshi · ActionJev · typesafe-migration-guard
Guardrails, moderation & security
| Project | ★ | What it does |
|---|---|---|
| kitze/unclutter | 138 | Browser extension for Jev-powered page-clutter removal with reusable rules |
| DevMortimer/pi-warden | 99 | Guardrails for the Pi coding agent; Jev judges irreversibility and steers |
| trungdq88/youtube-sponsor-detection | 74 | Finds sponsor reads in videos and skips them |
| realZachi/typesafe-adblock | 58 | Chrome extension asking Jev "is this DOM element an ad?" |
| RafalWilinski/vibecheck | 42 | Vibe-checks your X posts before you send them |
| brainstormity/Jev-Moderation-Bot | 36 | Discord bot: real-time spam/scam filtering and escalation |
| jomatsu/pi-jev-auto-mode | 17 | Semantic auto-approval of bash commands |
| leepokai/jev-guard | 11 | Risk-scores every tool call with session context |
More: pi-jev-sentinel · jev-prompt-sentry · jev-pii-guardrail · Jeeves · jev-comment-triage · jev-sec-bench
Search, RAG & classification
| Project | ★ | What it does |
|---|---|---|
| superagents-lab/jev-search | 260 | Full web-search pipeline: source selection, query understanding, ranking |
| brainstormity/Jev-X-Sentiment-Analysis | 80 | 50–1000 crypto tweets → Buy/Sell/Hold terminal |
| kbhuw/jev-sift | 46 | Batch classification MCP — "classify first, read selectively" |
| zhuyansen/jev-search-rerank-eval | 4 | zh/en rerank eval, 9,831 pairs: Jev ≈ bge-m3 alone, RRF fusion +0.090 NDCG |
| samdotmak/jev-recall | 15 | Relevance-not-embedding memory filter |
More: invalidate · jev-curate · jevmail · jev-reranking · jev-rerank-bench · reranker
Finance & compliance
| Project | ★ | What it does |
|---|---|---|
| jarrodwatts/jev-trader | 1.4k | One AI trade decision every block on Monad, by an ex-thirdweb engineer |
| kyotofin/tax-doc-classifier | 281 | IRS tax-form page classifier: 261 form types, 100% strict accuracy at ~$0.001/page |
| aowang-ai/jev-trade | 30 | Live Jev trader on Hyperliquid |
| myc0576/SmartMoney-Cub | 24 | Trading journal + typed-judgment review harness |
More: Jev-Trades · jev-A-share-trader · jev-transaction-guard · system1-fraud-interceptor
Robotics, IoT & smart home
| Project | ★ | What it does |
|---|---|---|
| rokbenko/quackd | 217 | One CLI for robot fleets with per-robot decision models |
| RomanSlack/jev-drone | 81 | Camera-only autonomous quadrotor in MuJoCo; Jev at 2.5 Hz decides "what the situation means" while code owns control |
| AboveColin/HA-Jev | 27 | Home Assistant integration with token-budget kill switch |
| arielweinberger/jev-autopilot | 5 | Jev flies a drone point-to-point in a random city |
Databases & data tooling
| Project | ★ | What it does |
|---|---|---|
| realZachi/pg-jev | 228 | PostgreSQL extension: ask tables questions in plain language |
| pithings/advocaat | 85 | Typed client for asking AI questions about your data |
| giuliosmall/pg_typesafe | 79 | PG extension for categorical classification |
| jexp/neo4jev | 43 | Jev navigates a Neo4j graph by classifying neighbouring relations (by Neo4j's Michael Hunger) |
More: jevql · vgi-typesafe (DuckDB) · sqlite-jev
SDKs, MCP & integrations
- Official: Python/JS SDKs (docs) · typesafe-ai/system-one-adapter-python (LLM-backed comparison adapter)
- MCP servers: jkudish/jev-mcp (129★) · itsmostafa/typesafe-mcp (123★, Go single binary) · tacticocc/Jevbridge (ACP+MCP bridge) · burnigtm/jev-mcp
- Community SDKs: obie/ruby_decision_model (Ruby, by Obie Fernandez) · dannote/jev (Elixir/OTP) · Twister915/typesafe-ai (Rust) · huncho (decisions-as-code with hysteresis) · JevSwiftSDK (Swift) — plus Go, Java/Kotlin, .NET, PHP/Laravel, Scala clients
- Frameworks & gateways: yusukebe/hono-jev-router (semantic HTTP routing, by Hono's creator) · llama-index-jev (nDCG@5 0.340→0.396) · typesafe_agent_gates (LangChain middleware) · kushals256/jevcache (skip the LLM when intent matches) · RyanKung/rotom · new-api-plugin-typesafe · n8n nodes (vibe-with-me-tools)