Let the agent write the data, not the HTML

There are two ways to let an AI agent produce an invoice. You can ask it for the invoice: it writes HTML, something prints it, and a PDF comes out. Or you can hand it an invoice template someone has already reviewed and ask it only for the facts — who, what, how many, at what rate — as JSON. The first way works in a demo. The second one is the one that survives a second run.