# Jev: TypeSafe's Probability-Based Decision System

> Jev uses typed decisions for yes/no judgments, choices, and scores without generated text.
- Title: Jev: TypeSafe's Probability-Based Decision System · GitHub
- Summary: Jev uses typed decisions for yes/no judgments, choices, and scores without generated text. Jev is TypeSafe's system for probability-based decisions with…
- Keywords: jev, typesafe, system one, probability, decision system, source links, curated gallery, x gallery, openrouter, playwright, mac automation, agent tools
- Source: GitHub — https://github.com/Amal-David/awesome-jev
- Read time: 1 min
- Topics: jev, typesafe, system one, probability, decision system, source links, curated gallery, x gallery, openrouter, playwright, mac automation, agent tools
## What is Jev?
Jev is TypeSafe's System One model for probability-based yes/no judgments, choices, and scores rather than generated text.
## Key Safety Note
Check permissions and data handling before running a project. Source review is not a runtime test or a security audit.
## Getting Started
Start with the quick-start example, then build a typed classifier, use Jev in an agent, or explore a local alternative.
## Demos
Jev Ultrafast, Voice Browser, jev-align, TypeSafe Computer Use, and Jev Browser Skill are creator recordings and publisher previews.
## SDKs and Skills
TypeSafe Python SDK, JavaScript SDK, Official TypeSafe Skill, Tenbin, wellposed, jevrs, and Jevify are available tools.
## Browser and Desktop Tools
Jev Ultrafast, Voice Browser, TypeSafe Computer Use, Cua Driver, and Jev Social are browser and desktop automation tools.
## Agent Tools
jev-align, Winnow, Jev-Mem, patdown, Oko, jgrep, SemDecide, Leanest, Supercov, Foreman, jev-belay, jev-claude-statusline, and Jev MCP are agent tools.
## Apps and Integrations
DocJev, tisco, neo4jev, MinusPodJev, llm-typesafe, Home Assistant Jev, nospace, Vibe Domain, and Spliit Cloud are integrations.
## Games and Creative Projects
Jev Music Playground, JevAI for XMage, PROMPT FPS, Jev Plays Snake, jev-plays-pokemon-red, TypeSafe Mario, JevPilot, and Jev Chess are creative projects.
## Independent Models
AnyJev, CUA-S1-FORMS, Jevlike, OpenJev SGLang, and Open Medical Jev are independent models.
## Reading and Research
Jev in the Wild surveys 2,170 public Jev projects and maps early growth, application domains, and decision-use patterns.
## Supporting Drivers
Browser Harness is a model-neutral CDP connection used by Jev Ultrafast, not a Jev model.
## Key takeaway

Jev is TypeSafe's system for probability-based decisions with source links and curated examples.