This site itself
The ArteyuLabs product and services site: React written from scratch, prerendered to static HTML in two languages, with its own build gates and a verification suite that drives a real browser.
assertions that drive a real browser before anything ships - including one that reads the computed opacity of every piece of text on the page, because text below full opacity is a measured accessibility failure rather than a style choice.
What was done
A typed route table is written first, then a prerender step walks it and writes one HTML file per route - plus an English twin of every one, so the second language is crawlable rather than existing only after hydration.
Six gate scripts run before a byte is bundled: em dashes, sellable products, landing pages, short links, prefilled WhatsApp messages and outbound URLs. Each gate exists because that thing failed silently once - product titles are split on a separator, so one reintroduced em dash broke the short name on sixteen cards with no error anywhere.
After the build, a suite of 50 assertions drives a real browser: the keyboard path, the language toggle, the reduced-motion state, the no-JavaScript hero, and one check that reads the computed opacity of every piece of text at two widths in both motion states.