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The Website Specification
What a good website does, regardless of your stack
A platform-agnostic spec of what a good website does in 2026 — across SEO, accessibility, security, agent readiness, performance, privacy, and more. Every recommendation cites primary sources. Ships with llms.txt, an MCP server, and an Agent Skill. MIT + CC BY.
Hi Product Hunt, Joost here, founder of Yoast SEO.
For years I've answered "what should my website actually do?" by pointing at six different sources: WHATWG, WCAG, IETF RFCs, schema.org, MDN, Google Search Central. None of them is a single, opinionated answer.
So I built one.
specification.website covers ten areas (foundations, SEO, accessibility, security, well-known URIs, agent readiness, performance, privacy, resilience, i18n). Every entry has a status — required, recommended, optional, or avoid — and 2–4 primary-source citations. No marketing fluff, no upsell, no login.
What I think makes it different from existing "best practices" guides:
- The bar for "required" is "the platform contract breaks without it" — not "we strongly recommend it"
- It covers modern agent-readiness (llms.txt, MCP, Agent Skills, Web Bot Auth) alongside the classics
- The site itself is the worked example — everything it recommends, it ships. MCP server, A2A endpoint, Markdown mirror via Accept content negotiation, strict CSP, the lot
- All ten surfaces (HTML, /llms.txt, /llms-full.txt, RSS, sitemap, search index, MCP data) derive from one Markdown content collection
It's free. MIT for code, CC BY 4.0 for content. Fork it, audit your site against it, send PRs when you disagree.
Happy to answer anything about the technical choices or the editorial decisions about what's "required" vs "recommended".
About The Website Specification on Product Hunt
“What a good website does, regardless of your stack”
The Website Specification was submitted on Product Hunt and earned 4 upvotes and 1 comments, placing #142 on the daily leaderboard. A platform-agnostic spec of what a good website does in 2026 — across SEO, accessibility, security, agent readiness, performance, privacy, and more. Every recommendation cites primary sources. Ships with llms.txt, an MCP server, and an Agent Skill. MIT + CC BY.
On the analytics side, The Website Specification competes within Open Source, SEO and Developer Tools — topics that collectively have 619.4k followers on Product Hunt. The dashboard above tracks how The Website Specification performed against the three products that launched closest to it on the same day.
Who hunted The Website Specification?
The Website Specification was hunted by Joost de Valk. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of The Website Specification including community comment highlights and product details, visit the product overview.
Joost de Valk