What "production-ready" actually means for a Next.js template — a single-source-of-truth architecture (opens in new tab)

I bought a "production-ready" template once. It was a single page. Beautiful hero, three feature cards, a footer with href="#" links, and a contact form whose submit button did absolutely nothing. That's not a product — it's a screenshot with extra steps. So when I built a set of 20 Next.js + Tailwind templates, I wrote down what "production-ready" has to mean before writing a line of UI. Here's the architecture, and the five rules that separate a real template from a glorified landing page. ...