The problem: agents invent APIs I've been building CMS software for web designers since 2015. This year I started building with coding agents every day, and I kept hitting the same failure. I'd ask an agent to add a section to a site, and it would confidently write a template that called a function that didn't exist. Plausible name, plausible arguments, wrong. Sometimes it came from an older version. Sometimes it was invented whole. The code looked right, and that was the problem. A br...