Agent Ready HTML

Docusaurus: vendor profile

In short

Docusaurus writes one HTML file per route at build time, adds canonical and hreflang links on its own, and stops a production build at a broken link. No robots.txt, llms.txt or .md twin comes with it, and headers and status codes fall to the host. docusaurus.io returned 404 for a docs page's .md address on 2026-11-05.

At a glance

standards.txt docusaurus

llms-txt               = no statement
markdown-negotiation   = no statement
markdown-twin          = no statement
initial-html           = supports
real-404               = no statement
vary-accept            = no statement

1 supports, 0 partial or announced, 5 no statement.

Docusaurus Framework

Docusaurus is Meta's open source static site generator for docs that writes an HTML file per route at build time with sitemap, canonical and hreflang output; llms.txt, markdown copies and status codes are left to plugins and the host.

Type
Framework
Operator, as the facts below state it
Meta
Home page
docusaurus.io, answered HTTP 200 on 2026-11-05
Last read
5 November 2026

What it does for this layer

  • Docusaurus 3.10, announced on 2026-04-07, is the last release in the v3 line and adds future.v4 flags so sites can opt in to v4 breaking changes early. [primary source, 2026-04-07] source, read 5 November 2026.
  • Docusaurus 3.10 marked Docusaurus Faster stable, its build stack of Rspack, SWC and LightningCSS, set with faster: true and planned as the v4 default. [primary source, 2026-04-07] source, read 5 November 2026.
  • Docusaurus 3.10 added a basic AGENTS.md file to the repository and restated that any AI use in contributions to Docusaurus must be disclosed. [primary source, 2026-04-07] source, read 5 November 2026.
  • Docusaurus 3.9, released on 2025-09-25, dropped Node.js 18 and added support for Algolia DocSearch v4 with its AskAI feature. [primary source, 2025-09-25] source, read 5 November 2026.
  • Docusaurus adds title, description and canonical URL links to every Markdown page on its own, plus hreflang alternate links when i18n is configured. [primary source] source, read 5 November 2026.
  • Docusaurus produces rich search result markup for blog posts out of the box, and site-wide JSON-LD is declared by hand through headTags or a <head> block. [primary source] source, read 5 November 2026.
  • Docusaurus does not generate robots.txt, which owners add as a static asset, and its noIndex site option stamps noindex, nofollow on every page. [primary source] source, read 5 November 2026.
  • Docusaurus's @docusaurus/plugin-sitemap ships in preset-classic, writes sitemap.xml after a production build and skips pages carrying a noindex robots meta tag. [primary source] source, read 5 November 2026.
  • Docusaurus's trailingSlash option sets the file layout, emitting /docs/myDoc/index.html when left undefined and /docs/myDoc.html when set to false. [primary source] source, read 5 November 2026.
  • Docusaurus's onBrokenLinks setting throws by default, so a production build fails when it finds a broken link. [primary source] source, read 5 November 2026.
  • The Docusaurus deployment guide tells Netlify users to switch off the Pretty Urls setting, which can cause lowercase URLs, extra redirects and 404 errors. [primary source] source, read 5 November 2026.
  • docusaurus.io/docs/seo fetched with curl on 2026-11-05 returned 89,643 bytes of HTML with 1,342 visible words before any script ran. [observed, 2026-11-05] source, read 5 November 2026.
  • On 2026-11-05 docusaurus.io sent text/html to a request for /docs/seo with Accept: text/markdown, and /docs/seo.md returned HTTP 404. [observed, 2026-11-05] source, read 5 November 2026.
  • The initial HTML of docusaurus.io/docs/seo on 2026-11-05 held one JSON-LD block of type BreadcrumbList. [observed, 2026-11-05] source, read 5 November 2026.

Products and plans

Plans and prices as the vendor's own pages showed them on the date read.
ProductWhat it isPriceAs ofSource
DocusaurusOpen source static site generator for documentation sites, blogs and pages, maintained by Meta Open Source.Free, open source
Free; version 3.10.2 current on 2026-11-05		2026-11-05source

Standards

The six standards this site tracks; no statement means the pages read said nothing.
StandardStatusWhat the vendor's pages saySource
llms-txtno statementNo llms.txt option in the docusaurus-config reference or SEO guide for 3.10.2; llms.txt comes from community plugins.none
markdown-negotiationno statementNeither the SEO guide nor the config reference covers markdown output, and docusaurus.io sent text/html to a markdown request on 2026-11-05.none
markdown-twinno statementCore Docusaurus documents no .md copies, and docusaurus.io/docs/seo.md answered 404 on 2026-11-05.none
initial-htmlsupportsThe SEO guide calls Docusaurus a static site generator that writes one HTML file per route.source
real-404no statementDocusaurus emits static files and leaves the status code to the host, and docusaurus.io gave a made-up path 404 on 2026-11-05.none
vary-acceptno statementDocusaurus has no negotiation to vary on, and docusaurus.io sent vary: Accept-Encoding only.none

Checks on its own site

Readings of docusaurus.io, the vendor's own website, which describe that site and not the product.
ReadingResultDate
Home page requestHTTP 200; H1 in the initial HTML: yes; 701 words; 0 JSON-LD blocks2026-11-05
Request with Accept: text/markdownHTTP 200, text/html, Vary: Accept-Encoding2026-11-05
/llms.txt at the host rootHTTP 404, text/html, 20 KB2026-11-05
A made-up pathHTTP 4042026-11-05
Ora score, cached43, grade D2026-11-03
Cloudflare keyless scan7, L0 Not Ready2026-11-05
Shared crawl rowoutside the ranked slice; home page HTTP 200; H1 in the HTML: yes; 762 words; JSON-LD types: none; answers markdown: no; made-up path HTTP 404; llms.txt valid: no2026-11-04

What it does not do

  • Docusaurus core writes no llms.txt and no .md twin of pages; both need a third-party plugin, and docusaurus.io/docs/seo.md returned 404.
  • Docusaurus does not control HTTP status codes or headers; 404 handling, trailing-slash redirects and X-Robots-Tag depend on the static host.

Related pages on this site

Sources

  1. Docusaurus: home page https://docusaurus.io/, read 5 November 2026
  2. Docusaurus 3.10 | Docusaurus https://docusaurus.io/blog/releases/3.10, read 5 November 2026
  3. Docusaurus 3.9 | Docusaurus https://docusaurus.io/blog/releases/3.9, read 5 November 2026
  4. Search engine optimization (SEO) | Docusaurus https://docusaurus.io/docs/seo, read 5 November 2026
  5. docusaurus.config.js | Docusaurus https://docusaurus.io/docs/api/docusaurus-config, read 5 November 2026
  6. Deployment | Docusaurus https://docusaurus.io/docs/deployment, read 5 November 2026

Last reviewed 5 November 2026