A schema attached to an extraction task looks like a description of the output you expect back. It is really a set of instructions the model reads while it generates, and it presses on what comes out. That reframing is the whole subject. A schema is not a passive record of the shape you hope to receive and inspect…

There is a difference between asking a model for JSON and guaranteeing that what comes back conforms to a schema. It looks like a formatting detail. It is actually one of the most consequential architectural decisions you make when you put a language model inside a larger system, because it determines where the risk of malformed output lives, what…