Jev glossary
Ecosystem
Jev Engineering
The practice of splitting a workflow into an LLM that writes, Jev that decides, and code that acts.
- Category
- Ecosystem
- Also known as
- —
- Reading time
- 1 min
- Related terms
- 4
- Directory entries
- 2
- Docs
- —
- Added
- 2026-10-11
Definition
The term, popularized by the Made with Jev and Jev.aitools.fyi directories, names the architecture that recurs across community builds: a generative model produces open-ended content, Jev makes the bounded judgments, and ordinary code holds the control flow and side effects.
It shows up in agent supervisors like Foreman, browser loops like Jev Ultrafast, and hundreds of smaller demos, and it is the design TypeSafe's own patterns describe as combining typed decisions with deterministic checks.
Tagsecosystempatterns
Related terms
Definitions that connect to this one.
Coding agentThe fastest-growing corner of the Jev ecosystem: MCP servers, tool-call gates, context pruners, and skill rankers.EcosystemAgent loopA control pattern where the model chooses its next step repeatedly; TypeSafe's guidance is to prefer a code-owned workflow instead.Core ConceptsClient SDKThe official typed clients for the API — Python and JavaScript/TypeScript — with retries and inferred answer types.API & ModelsTyped decisionA model output that conforms to a software type your code expects, rather than free-form text that has to be parsed.Core Concepts
From the Jev directory
Directory entries that go deeper on this term.
A Python asyncio runtime that puts Jev in a supervision loop above Codex or OpenCode workers: it judges completion, test sufficiency, and stuck loops, then steers, retries, or stops the job.
Jev Tools & CLIs#community#python#coding-agent
Community
thruwire/foremanPython
thruwire/foremanPythonBrowser Use's ultrafast agent: Jev picks an operation and an element from an indexed action space in one request, and a small LLM writes text only when the action is TYPE_TEXT.
Jev Tools & CLIs#community#python#browser
Community
browser-use/jev-ultrafastPython
browser-use/jev-ultrafastPythonFrom the Jev AI model community
Posts from builders shipping with Jev right now.