The Jev ecosystem
20 open-source projects built with Jev
Jev’s typed, fast judgments have become a building block for browser agents, coding tools, data pipelines and even games. This is a curated directory of third-party open-source projects — each one links to its GitHub repository so you can read the code yourself.
Coding agents & developer tools
Context management, routing, review and search — where fast, cheap judgment pays off.
fast-jev-compaction
★ 5.6k starsby tamaratran
A Claude Code plugin that replaces compaction summaries with Jev decisions: every tool call is scored in one fast request, stale output is dropped or truncated, and anything kept stays verbatim.
github.com/tamaratran/fast-jev-compaction ↗
jev-codex-router
★ 120 starsby 0xNatoshi
Per-turn model and reasoning routing for coding agents: Jev judges how hard the current task is, then picks the model tier, thinking depth and speed mode.
github.com/0xNatoshi/jev-codex-router ↗
Winnow
★ 36 starsby GhalebDweikat
Context garbage collection for Claude Code. When Read/Bash/Grep floods the context window, Jev judges which results actually matter for the task at hand before they enter it.
github.com/GhalebDweikat/winnow ↗
jev-review
★ 430 starsby devagrawal09
A staged code-review workflow: Jev flags the high-risk changes first, so the expensive model — or a human — only looks at what matters. Ships with a local dashboard.
github.com/devagrawal09/jev-review ↗
Blink
★ 31 starsby ellipsis-dev
Codebase search and navigation powered by Jev: at each directory level it judges which files are most relevant to your question and keeps drilling down.
github.com/ellipsis-dev/blink ↗
Canny
★ 9 starsby qkal
Keeps coding agents honest about “done”: it inspects tool output, diffs and test results, and Jev judges whether the completion claim actually holds up.
github.com/qkal/Canny ↗
json-render
★ 16k starsby vercel-labs
Vercel Labs' generative UI framework. In their experiments, Jev never writes JSON token by token — it selects components, props and layout directly.
github.com/vercel-labs/json-render ↗
MCP integrations
Plug Jev into Claude Code, Claude Desktop, Codex and other MCP clients.
typesafe-mcp
★ 160 starsby itsmostafa
An MCP connector that gives your AI clients direct access to Jev for Choice, Score and Noul questions. A good starting point if you just got an API key.
github.com/itsmostafa/typesafe-mcp ↗
jev-mcp
★ 190 starsby jkudish
A toolbox of ready-made judgment tools exposed as MCP servers: fact-checking, content moderation, semantic ranking, classification and information extraction.
github.com/jkudish/jev-mcp ↗
Browser & computer use
Agents that act on browsers and desktops with judgment in the loop.
jev-ultrafast
★ 13.5k starsby browser-use
A high-speed browser agent built on Browser Use. Jev makes the per-step decisions — what to do next and which element to act on — while typing is delegated to a small model.
github.com/browser-use/jev-ultrafast ↗
agent-desktop
★ 1.4k starsby lahfir
Desktop automation in Rust: it reads the OS accessibility tree instead of guessing from pixels, and Jev decides which button, menu or input field to act on next.
github.com/lahfir/agent-desktop ↗
Data & pipelines
Filtering, scoring and navigating data with typed decisions.
SemDecide
★ 13 starsby sharziki
Typed semantic decisions for the command line: classify, score and filter directly inside Unix pipelines — a natural fit for crawlers, CI jobs and data workflows.
github.com/sharziki/semdecide ↗
neo4jev
★ 56 starsby jexp
Jev inside a Neo4j knowledge graph: at each node it classifies which outgoing edge is most worth following, then keeps exploring along the best path.
github.com/jexp/neo4jev ↗
jev-curate
★ 6 starsby AkashPriyadarshii
Sift training data with Jev: JSONL and Parquet rows are scored for quality, relevance and risk before they enter downstream training sets.
github.com/AkashPriyadarshii/jev-curate ↗
Trading & markets
Decision layers on top of execution — judgment, not order-spraying.
jev-trader
★ 1.6k starsby jarrodwatts
Market making on the Monad testnet: each block, Jev reads the spread and trade direction and decides the next buy or sell move.
github.com/jarrodwatts/jev-trader ↗
Prism
★ 53 starsby irfndi
A liquidity-providing agent where Jev doesn't place orders itself — it judges market states such as toxic flow and mean reversion, then hands off to the existing strategy.
github.com/irfndi/prism-liquidity-agent ↗
Experiments & fun
Games, drones and idea judges — proof that judgment models go anywhere.
typesafe-mario
★ 310 starsby fhshaik
Jev plays Super Mario Bros. — not from screenshots, but by reading the emulator's structured RAM state and deciding when to run, jump and dodge.
github.com/fhshaik/typesafe-mario ↗
jev-drone
★ 92 starsby RomanSlack
A camera-only autonomous drone in MuJoCo simulation: the low-level flight controller keeps it stable while Jev makes the high-level calls in the loop.
github.com/RomanSlack/jev-drone ↗
OneVOneJev
★ 7 starsby emrickgarrett
A browser-based 1v1 FPS where every decision tick asks Jev about movement, view direction, aiming, firing and jumping.
github.com/emrickgarrett/OneVOneJev ↗
killmyidea
★ 44 starsby monteduro
Describe a startup idea and Jev scores it across multiple dimensions, returning a verdict: KILL, FIX or SHIP.
github.com/monteduro/killmyidea ↗