Specification Website
Apply The Website Specification — a platform-agnostic specification of what a good website does, with each item tagged required, recommended, optional, or avoid. Use when the user asks what their site should have, whether something is required, how to audit a URL, what's missing for agent readiness, or anything else where you'd otherwise be guessing at web best practice. Covers HTML foundations, SEO, accessibility, security, well-known URIs, agent readiness, performance, privacy, resilience, and internationalisation. Backs answers with primary sources (WHATWG, W3C, IETF RFCs, IANA, WCAG, schem
Install
npx skills add tcsenpai/specification-website-skill --skill specification-websitegit clone --depth 1 https://github.com/tcsenpai/specification-website-skill.git /tmp/specification-website-skill
mkdir -p ~/.claude/skills
cp -r /tmp/specification-website-skill/. ~/.claude/skills/specification-websitePersonal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.
From the SKILL.md
# The Website Specification — Agent Skill A single source of truth for what a good website does. Ten categories, 128 topics, every item tagged with a status (`required`, `recommended`, `optional`, `avoid`). This skill bundles **all 128 topic pages** as local Markdown so the agent can answer offline, plus optional MCP / HTTP routes for the freshest data. Upstream: <https://specification.website> · Repo: <https://github.com/jdevalk/specification.website> ## When to use this skill Invoke it whenever the user: - Asks "what should my site have", "is X required", "audit this URL", "what does the spec say about Y". - Asks about HTML foundations, SEO, accessibility (WCAG), HTTP security headers, well-known URIs (`/.well-known/*`), agent/AI readiness (`llms.txt`, MCP, `robots.txt`, structured data), Core Web Vitals, privacy/consent, error/offline pages, i18n/hreflang. - Reviews a real site and wants to cite primary standards (WHATWG, W3C, IETF, IANA, WCAG, schema.org) rather than vendor blog posts. - Needs a tickable checklist of required + recommended items. - Wants a machine-readable contract for a platform-agnostic audit. Do **not** invoke for: writing application logic, choosing a JS framework, generic programming questions unrelated to web platform features. ## File layout
Details
- Skill name
specification-website- Repository
- tcsenpai/specification-website-skill
- Repo updated
- 31 May 2026
FAQ
What does the Specification Website skill do?
Apply The Website Specification — a platform-agnostic specification of what a good website does, with each item tagged required, recommended, optional, or avoid. Use when the user asks what their site should have, whether something is required, how to audit a URL, what's missing for agent readiness, or anything else where you'd otherwise be guessing at web best practice. Covers HTML foundations, SEO, accessibility, security, well-known URIs, agent readiness, performance, privacy, resilience, and internationalisation. Backs answers with primary sources (WHATWG, W3C, IETF RFCs, IANA, WCAG, schem
How do I install the Specification Website skill?
skills CLI (Claude Code, Cursor, Codex and more): npx skills add tcsenpai/specification-website-skill --skill specification-website. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.
Is Specification Website popular?
It lives in tcsenpai/specification-website-skill, which has 28 GitHub stars and 2 forks.
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