The Website Specification

The Website Specification is a platform-agnostic technical checklist covering 168 topics across ten categories—from HTML basics to security, accessibility, and performance—designed to help developers audit and improve their websites against modern web standards. The specification is standards-based (referencing WHATWG, W3C, IETC, and WCAG), available as an open MCP server for AI agents, and maintained collaboratively on GitHub with implementation guidance for any platform or framework.