What a good website does. A platform-agnostic specification of the technical features every decent website should have — from <title> to /.well-known/security.txt , from WCAG contrast to llms.txt . Written for humans and agents. Categories Ten areas, mapped to widely-accepted standards. All topics → The HTML, head, and document basics every page needs. Search visibility — robots.txt, sitemaps, canonicals, structured data. WCAG-aligned rules so people of all abilities can use the site. Headers, transport, and policies that keep visitors safe. Standard, agreed-upon paths under /.well-known/. Things that make a site legible to AI agents and crawlers. Core Web Vitals, caching, images, fonts, network behaviour. Consent, signals, and respecting visitor choice. Graceful failure — error pages, offline, redirects. Language, locale, direction, and translated content.…