Think of Jev as a frontier-intelligence function call: unstructured state in, typed probabilistic decisions out.
Jev gives up free-form text and returns probabilities over types declared in advance. That sounds narrower than a language model because it is, but the narrowness is the feature. Much of “AI-powered software” asks a model to write a little JSON ceremony around a branch the program already understands.
Type safety does not mean Jev “can’t hallucinate.” It cannot invent a fourth option, but it can
still confidently choose the wrong one. What it can do is avoid malformed answers and return a
decision in 70–500 milliseconds. The useful primitive is not a chatbot pretending to be an API. It
is a fuzzy if statement.