aionedge.The best open source Jev projects share one design: software prepares a small set of options, Jev picks one with a probability, and ordinary code decides whether to act. The 21 projects below were chosen from 949 verified repositories in the AionEdge index because each shows that pattern clearly in readable code.
The pattern every good Jev project follows
If you are new to how Jev works, the short version is that it answers typed questions about a state you supply. The projects that work well keep the model's job small and the surrounding code in charge:
Watch for that last step as you read the list. The strongest projects never let Jev act directly. It recommends, and a threshold, a rule or a person makes the final call.
Jev projects for coding agents
Coding agents are Jev's busiest testing ground, because an agent makes dozens of small choices per task that do not need a frontier model.
jev-review (devagrawal09) devagrawal09/jev-review
A staged code reviewer that uses Jev to triage risk and pick where a human should look first. A good example of a model that ranks attention rather than writing comments.
What Jev decides: Judges risk, files, evidence regions, mechanisms and severity before rule-based reviewer routing.
- Stars
- 544
- Language
- TypeScript
- License
- MIT
- Category
- Agent tooling
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
foreman thruwire/foreman
A supervisor loop that watches a coding agent's diffs, logs and tests and asks Jev whether the worker is stuck or off track. Small, readable and easy to adapt.
What Jev decides: AsyncTypeSafeClient.system_one with default jev-latest sends Noul questions for supervision.
- Stars
- 512
- Language
- Python
- License
- MIT
- Category
- Agent tooling
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
jev-codex-router 0xNatoshi/jev-codex-router
Classifies each Codex turn so local rules can choose the model, reasoning effort and speed. The cleanest illustration of routing as a Jev job.
What Jev decides: Classifies task difficulty and reasoning needs before local policy selects a model configuration.
- Stars
- 222
- Language
- JavaScript
- License
- MIT
- Category
- Agent tooling
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
codex-jev-compaction Wang-auspicious/codex-jev-compaction
Keeps agent context lean by having Jev judge which old tool records are still relevant, while the kept text stays verbatim. A tidy answer to context bloat.
What Jev decides: Judges relevance of eligible read-only tool records; local rules protect required content and assemble a handoff packet.
- Stars
- 2
- Language
- JavaScript
- License
- MIT
- Category
- Context GC & Filter
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
Jev MCP servers and infrastructure projects
typesafe-mcp itsmostafa/typesafe-mcp
An MCP server that lets Claude Code, Claude Desktop, Codex and other clients ask Jev typed questions. The quickest way to try Jev inside tools you already use.
What Jev decides: Submits state and Choice, Score or Noul questions and returns structured answers with probabilities.
- Stars
- 258
- Language
- Go
- License
- MIT
- Category
- Agent tooling
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
jev-mcp (jkudish) jkudish/jev-mcp
A broader MCP toolkit covering evidence checks, screening, reranking and extraction. Useful as a menu of question designs even if you never install it.
What Jev decides: Uses typed questions to assess evidence support, content risk and candidate relevance.
- Stars
- 282
- Language
- JavaScript
- License
- MIT
- Category
- Agent tooling
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
pg-jev realZachi/pg-jev
Brings Jev into PostgreSQL so a query can filter, classify or rank rows in plain English. A glimpse of Jev as a database primitive.
What Jev decides: Sends row content to Jev for a match decision, category, or score used by SQL conditions and ordering.
- Stars
- 306
- Language
- Shell
- License
- Check upstream
- Category
- Frameworks & integrations
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
Jev browser and desktop agents
A web page or desktop app offers a finite set of things to click. That makes computer use a natural fit: choose an action instead of generating one.
Jev Ultrafast browser-use/jev-ultrafast
The best-known Jev browser agent. Jev picks each action and element, and a text model is called only when something needs typing.
What Jev decides: Chooses an action and its matching DOM element in one request; a text model generates input text.
- Stars
- 17,985
- Language
- Python
- License
- MIT
- Category
- Browser & computer use
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
agent-desktop lahfir/agent-desktop
Reads native accessibility data so Jev can choose controls on the desktop, with a separate risk estimate before local policy lets anything run.
What Jev decides: Jev selects a target and action and estimates presence and risk; local policy decides whether to execute.
- Stars
- 1,506
- Language
- Rust
- License
- Apache-2.0
- Category
- Browser & computer use
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
unclutter kitze/unclutter
A browser extension that asks Jev which page elements are ads or pop-ups and saves the answers as reusable hiding rules. A consumer-friendly demo of the idea.
What Jev decides: Evaluates candidate page elements before the extension applies local hiding rules.
- Stars
- 200
- Language
- TypeScript
- License
- MIT
- Category
- Browser & computer use
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
Jev games and simulations
Games make Jev's speed visible, and they also show where it should not be fully in control. The good ones keep aiming, physics and safety in ordinary code.
typesafe-mario fhshaik/typesafe-mario
Feeds Jev structured emulator memory instead of screenshots and lets it pick a legal controller action. A clear lesson in designing the state, not just the question.
What Jev decides: Reads motion, enemies, terrain and recent controls, then selects a predefined legal action.
- Stars
- 352
- Language
- Python
- License
- Check upstream
- Category
- Games & simulations
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
jev-doom-agent lukaske/jev-doom-agent
Runs Doom in the browser and compares Jev-controlled players from the same starting point. Jev picks tactics; a local controller handles the fine movement.
What Jev decides: Jev reads structured health, ammunition and targets and selects tactical controls executed by a local controller.
- Stars
- 8
- Language
- TypeScript
- License
- Check upstream
- Category
- Games & simulations
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
jev-drone RomanSlack/jev-drone
A simulated drone that turns camera buffers into features Jev can judge, such as obstacle heights and target state, while flight control stays local.
What Jev decides: Uses range sectors, obstacle heights and target state to choose maneuvers and assess risk or target loss.
- Stars
- 131
- Language
- Python
- License
- MIT
- Category
- Games & simulations
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
Jev projects for data, search and documents
Not every Jev project is an agent. Some of the most practical ones are plain pipelines that make a judgment per row, per page or per hop.
neo4jev jexp/neo4jev
Walks a Neo4j graph one hop at a time, asking Jev which relationship to follow next, with a local beam search keeping the best paths.
What Jev decides: Choice scores neighboring relationships and Noul checks goal completion; local beam search retains candidate paths.
- Stars
- 94
- Language
- Jupyter Notebook
- License
- MIT
- Category
- Frameworks & integrations
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
jev-curate AkashPriyadarshii/jev-curate
A Rust dataset filter that keeps or drops records using Jev scores and thresholds. Ideal if you clean training or evaluation data.
What Jev decides: Runs local prefilters, calls TypeSafe and applies probability and score thresholds to each record.
- Stars
- 26
- Language
- Rust
- License
- MIT
- Category
- Benchmarks & research
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
tax-doc-classifier kyotofin/tax-doc-classifier
Sorts pages of tax documents into predefined form and page types. A realistic back-office job with a fixed, well-defined label set.
What Jev decides: Extracts PDF page text and sends it to Jev for form type, page type, and confidence.
- Stars
- 396
- Language
- TypeScript
- License
- Apache-2.0
- Category
- Applications
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
Jev guardrails and safety checks
agentgateway agentgateway/agentgateway
Shows Jev as a guardrail inside an agent gateway, scoring requests for jailbreaks and secret disclosure before thresholds reject them.
What Jev decides: Jev scores jailbreaks, harmful content and secret disclosure; thresholds or evaluation errors reject requests.
- Stars
- 4,986
- Language
- Rust
- License
- Apache-2.0
- Category
- Security & Guardrails
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
jev-experiments dabit3/jev-experiments
A grab bag of developer-tool experiments, including a commit check that flags exposed credentials or destructive changes in a staged diff.
What Jev decides: Judges risks such as exposed credentials or destructive changes; local rules warn or block a commit.
- Stars
- 369
- Language
- TypeScript
- License
- Check upstream
- Category
- Security & Guardrails
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
Jev trading experiments: read before you run
jev-trader jarrodwatts/jev-trader
A market-making experiment on a live order book where Jev gives buy or sell judgments per block and code handles orders. Study the architecture; do not treat it as a strategy.
What Jev decides: In Jev mode, order-book judgments feed code that simulates fills or submits configured post-only limit orders.
- Stars
- 2,050
- Language
- TypeScript
- License
- MIT
- Category
- Applications
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
Can you run Jev projects locally?
Most projects above run on your machine but call Jev's hosted API, so you need a TypeSafe key. If you want the decision pattern without the API, a small group of independent Jev-like models reproduce the question types on open weights:
openjev razorback16/openjev
An independent decision server that speaks a Jev-compatible API while running an open model locally. Handy for development and offline testing.
What Jev decides: Accepts Jev-style state and Noul, Choice, and Score questions, producing probabilities with a local model.
- Stars
- 313
- Language
- Python
- License
- Apache-2.0
- Category
- Jev-like models
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
AnyJev nokia-applied-research/AnyJev
A research project that derives Jev-style typed decisions from an ordinary language model's next-token probabilities, with no extra training.
What Jev decides: Choice, Noul, and Score primitives over an underlying LLM; not the hosted TypeSafe Jev model.
- Stars
- 23
- Language
- Python
- License
- Apache-2.0
- Category
- Jev-like models
GitHub ↗ · AionEdge listing · Jev code at a pinned commit ↗ Stars checked 2026-09-22
Neither is the hosted TypeSafe model, and quality will differ. For more options, browse the Jev-like models category.
Which Jev project should you try first?
| If you want to… | Start with | What it teaches |
|---|---|---|
| Use Jev inside Claude Code or Codex | typesafe-mcp | Question design through a familiar client |
| Cut coding-agent costs | jev-codex-router | Routing as a small, cheap decision |
| Automate a browser | jev-ultrafast | Choosing actions instead of generating them |
| Classify rows in a database | pg-jev | Jev as a query primitive |
| See Jev's speed | typesafe-mario | Designing structured state for real-time loops |
| Avoid the API entirely | openjev | The pattern on open weights |
Want more? See what is trending this week, or search the full directory by use case.
Frequently asked questions
What are the best open source Jev projects?
Good starting points are jev-ultrafast for browser automation, typesafe-mcp for using Jev in Claude Code and Codex, jev-codex-router for model routing, pg-jev for databases and typesafe-mario for real-time control. Each is linked above with its Jev code.
Is Jev itself open source?
No. Jev is a hosted model from TypeSafe AI. The SDKs and the projects on this page are open source, and independent Jev-like models such as openjev can run locally.
Do I need an API key to run these Jev projects?
Most of them call the hosted Jev API, so yes. Projects in the Jev-like models category can run without one using open weights.
How were these open source Jev projects chosen?
Each one is in the AionEdge index with its Jev code located at a pinned commit, has a clear readme, and illustrates a distinct use of the state, question and local-policy pattern. Star counts are shown for context, not used for ranking.
Where can I find more Jev projects on GitHub?
The AionEdge directory lists every indexed repository by category, and the trending page highlights the newest additions and the projects people are sharing this week.
1,235 repositories across 30 categories, each linked to its source.