GitHub - tcsenpai/specification-website-skill: Offline agent skill bundling specification.website (128 topics) for Claude Code and other SKILL.md-compatible agents. Spec content CC BY 4.0 by Joost de

A GitHub repository that packages all 128 topic pages from specification.website — covering web foundations, SEO, accessibility, security, performance, privacy, and more — as offline Markdown files for use by Claude Code and other SKILL.md-compatible AI coding agents. It installs via the skills.sh CLI with a single npx command and supports ~50 agents including Cursor, Windsurf, and Codex. The skill lets agents answer web best-practice questions and audit URLs against primary standards (W3C, WHATWG, IETF RFCs, WCAG) without network round-trips.