Updated Oct 3, 2026

What people are building with Jev

Projects, posts and guides about Jev, the System One model from TypeSafe AI. Each entry links to its source and shows the cost and speed its author reported.

Browse the builds What is Jev?

756builds
164guides
21use cases

Sponsoredoutrank.so
Outrank
Outrank - Grow Organic Traffic on Auto-Pilot.
GitHubSDKs and integrations
AnyDecisionModel
Typed decisions from language models, as a Swift package.
Mattt
12
GitHubSocial feeds
toxic-filter
Chosen expressions on X get blurred out.
eijiaraki
5
GitHubOpen source
QwenJev
A Jev-style conversion of Qwen-3.5-4B, at 0.169 s per frame.
RJMSWD
580.169 s
Guidegithub.com
Opik
Comet’s open-source evaluation and tracing platform, Apache-2.0. Datasets, experiments and trace-level feedback, with a custom-metric interface that takes several named scores from one call — which is how a Jev judge is wired into it.
GitHubSDKs and integrations
jev-rs
A Rust, Jev-compatible /v1/systemone engine, one prefill per judgement.
Yijun Yu
15
GitHubSDKs and integrations
hearim
A Jev-compatible, multi-backend System One gateway in Go.
ziozzang
5
GitHubOpen source
laya-mps
Jev-style typed decisions on a Mac, on little RAM.
afshinm
22
GitHubSDKs and integrations
any2jev
Put a Jev-shaped interface in front of another model.
hwfengcs
6
GitHubOpen source
solar-mini4-jev
Jev-style decisions on Solar Mini 4.
Sung Kim
45
GitHubTools and apps
jevguide
Curated Jev showcases from X, by category, with media previews.
2456868764
5
GitHubOpen source
laya-go
A Go server plus agent CLI and MCP for open System 1 models.
neko233-com
5
GitHubSEO and GEO
jevseo
Typed SEO, AEO and GEO judgements, with the rules staying in code.
epergaboni
4
GitHubInbox and support
jev-wechat-live
An abandoned WeChat overlay, published with the full post-mortem.
duckegg0623-create
5
GitHubOpen source
Jev-Compatible
Make an existing SGLang or vLLM deployment answer as a decision service.
David-Lolly
6
GitHubContext and memory
dsh-jev-prune
Context compaction for DeepSeek Harness, judged by Jev.
yangyu666
3
GitHubDocuments and OCR
jev-papers
A thousand arXiv papers, one Jev decision each, checked by an LLM judge.
stas4000
71,000 papers
GitHubAgents and browsers
prompt2jev
Turn a prompt, or the code that runs one, into a Jev decision.
sumleo
5
GitHubRobotics and devices
OmniJev
Multimodal Jev for robot decision-making.
Iron-LYK
GitHubTools and apps
fork-cast
What to eat, decided without any labels, on probabilities.
HaoxiangXia
3
Sponsoredgranola.ai
Granola
The AI notepad for back-to-back meetings.
GitHubBenchmarks and evals
Jev-in-the-Loop
Research on which LLM-decision tasks Jev actually speeds up.
Tongyun1
4
GitHubSDKs and integrations
jev_elixir
Jev from Elixir.
Elue
9
GitHubDocuments and OCR
hermes-jev-curator
Typed relation governance and safe archive plans.
anpicasso
3
GitHubBenchmarks and evals
Metask-Jev
Calibrated typed-decision models, one forward pass each.
Metask AI
2
GitHubGames and real time
clash-jev
A Clash Royale bot with no trained policy at all.
bytelabs-oss
33
GitHubAgents and browsers
ego-jev
One ~0.4 s typed decision per DOM step, instead of an LLM turn.
ZephyrDeng
11~0.4 s
GitHubAgents and browsers
dwim
Type what you want, and the right menu item runs in any Mac app.
Rohit Mehta
3
GitHubOpen source
open-jev (browser TypeScript)
Typed decisions in the browser: one state, any number of options.
Nico Martin
38
GitHubOpen source
OpenJev
An open Choice, Noul and Score API on open models.
zhangcy122
33
GitHubAgents and browsers
JevLoop
An agent loop where the decisions cost no LLM call.
zjunlp
20
GitHubOpen source
jevgraph
Knowledge graphs built from typed relation decisions, with the evidence kept.
chenmingtang830
28
GitHubSDKs and integrations
jev-feels
Semantic decisions as ordinary Ruby: feels?, decide, score.
Qew7
17
GitHubOpen source
jevflow
Probabilistic decisions as composable backend primitives.
Mawfyy
11
GitHubSecurity and abuse
Agent Chaperone
Screen an agent's tool calls with Jev before they run.
agent-chaperone
21
GitHubSDKs and integrations
Jev-CLI
Jev from the command line.
Josh Long
3
GitHubOpen source
von
A sub-15 ms local drop-in alternative to Jev.
wfzyx
738<15 ms
Sponsoredpostiz.com
Postiz
The Agentic Social Media Scheduling Platform.
Alex Volkov
@altryne
This is actually insane. This uses @typesafeai Jev model, as a plugin in Claude to review all the un-nesseasary tool calls, and it takes 1s to run! Like, literally, 1 second to take my Claude session from nearly 1M to ... 86K tokens! 😮 Ask your claude to install it and be amazed Use this prompt ``` Install, and configure : https://github.com/tamaratran/fast-jev-compaction ```
GitHubContext and memory
Pick
fast-jev-compaction
Stars
7.1k
Reported
~1M → 86K tokens
GitHubUI
json-render
Vercel Labs’ generative UI framework, with a Jev composer behind a flag.
Vercel Labs
18.4k
GitHubAgents and browsers
Agent Desktop
Desktop control from the accessibility tree, with Jev picking the operation.
Lahfir
1.7k
GitHubRouting and model choice
Jev Codex Router
Jev picks the model and the thinking effort for every Codex turn.
Natoshi
275
GitHubCoding and code review
blink
Codebase search by sending a hundred walkers through the file tree.
Ellipsis
88
GitHubSearch
SemDecide
grep for meaning and jq for judgment, with a Unix exit code.
Sharvil Saxena
69
GitHubCoding and code review
Canny
A warden that will not let a coding agent finish on a claim.
Qkal
101
GitHubTools and apps
Kill My Idea
Describe a startup idea. Jev says kill it, fix it or ship it.
monteduro
236
GitHubGames and real time
TypeSafe Mario
Jev picks NES controller inputs from telemetry, never from pixels.
fhshaik
411
GitHubGames and real time
1v1 Jev — Quickscope Arena
A browser shooter where the opponent is Jev, first to five kills.
Garrett Emrick
40

Jev GitHub repos

Code you can read, fork and run: jev-ultrafast, OpenJev, nanojev, jevlike, simplejev, jev-trader, jev-mcp and the rest. Each repo calls Jev for a decision — which link to follow, which bucket a ticket goes in, which move to make — and the figures on a card are the ones its author published.

318 builds and 12 guides