Jev Engineering：把决策层从推理层拆出来
提出请求→结构化状态→Jev 路由→最便宜可用模型→校验→执行闸门的循环，决策层只做路由、评分、拦截、批准，不写句子。
Jev Engineering is the term for what turns an agent stack into an actual control system. It moves the expensive model out of every decision loop. Up to 193x faster. 444x cheaper. Measured, not theoretical. The core idea: The model shouldn't decide everything. Here's the actual shape of the loop: request → structured state → Jev router → cheapest capable model → worker → relevance / approval checks → execution gate → tool The important part isn't the diagram, it's this. The decision layers don't generate prose. They route. Score. Block. Approve. Nothing in that layer writes a sentence. So the expensive model only gets called when the task actually requires reasoning, not for every checkpoint along the way. That's the whole point of Jev Engineering: Separate reasoning from decision-making. Then make the decision layer measurable, cheap, and fast. Full breakdown in the article below. Follow @cyrilXBT, this is the architecture pattern most agent builders haven't caught up to yet.
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