Agent Ready HTML

Astro: vendor profile

In short

Astro 7.0 shipped on 2026-06-22 with a Rust compiler, and 7.4 followed on 2026-10-15, but neither adds llms.txt or markdown output. On 2026-11-05 astro.build/llms.txt redirected to docs.astro.build, where the file returned 404. The Astro Technology Company joined Cloudflare on 2026-01-16, and Astro stays free under the MIT licence.

At a glance

standards.txt astro

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

2 supports, 0 partial or announced, 4 no statement.

Astro Framework

Open-source framework for content sites, owned by Cloudflare since January 2026. Pages prerender to static HTML with client JavaScript stripped unless a component opts in, so the text is in the first response; sitemaps come from an add-on.

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

What it does for this layer

  • Astro's blog announced on 2026-01-16 that The Astro Technology Company had joined Cloudflare, and that all of its full-time staff became Cloudflare employees who keep working on Astro. [primary source, 2026-01-16] source, read 5 November 2026.
  • Astro's post on joining Cloudflare commits the framework to staying MIT-licensed and platform-agnostic, with continued support for deployment targets other than Cloudflare. [primary source] source, read 5 November 2026.
  • The Astro Technology Company was formed in 2021 after a funding round; its founders write that paid hosted add-ons such as Astro DB never took off, and Astro DB lives on as the database client in core. [primary source] source, read 5 November 2026.
  • Four months before the acquisition, on 2025-09-23, Cloudflare gave Astro a $150,000 donation and became an official hosting partner. [primary source, 2025-09-23] source, read 5 November 2026.
  • Astro 6.0 shipped on 2026-03-10 with a built-in Fonts API, a Content Security Policy API and live content collections, and its dev server can now run the production runtime, such as Cloudflare's workerd, through Vite's Environment API. [primary source, 2026-03-10] source, read 5 November 2026.
  • Astro 7.0 (2026-06-22) rewrote the .astro compiler in Rust and made Satteri, a Rust Markdown and MDX processor, the default pipeline; projects relying on remark or rehype plugins switch to @astrojs/markdown-remark. [primary source, 2026-06-22] source, read 5 November 2026.
  • Before Astro 7.4 (2026-10-15), a server or worker entrypoint built from the pages() handler in astro/fetch or astro/hono answered unmatched URLs with an empty 404 body; the new notFound() handler serves the site's 404.astro page instead. [primary source, 2026-10-15] source, read 5 November 2026.
  • For each redirect in a static build, Astro writes a small HTML page with a meta refresh tag, so on a plain static host an agent gets a page rather than a 3xx response; Astro 7.4 added experimental.redirectPage and src/pages/3xx.astro to restyle that page. [primary source, 2026-10-15] source, read 5 November 2026.
  • Astro renders UI components from React, Vue, Svelte and similar libraries to HTML and CSS at build time and drops their client JavaScript unless the component carries a client:* directive. [primary source] source, read 5 November 2026.
  • Sitemaps in Astro come from the official @astrojs/sitemap integration (npx astro add sitemap), which needs the site option set to the deployed URL and then writes sitemap-index.xml plus numbered files such as sitemap-0.xml. [primary source] source, read 5 November 2026.
  • Matthew Phillips took over as Project Steward of Astro from Fred, the previous holder of the role, according to the August 2026 Astro newsletter. [primary source, 2026-08-31] source, read 5 November 2026.
  • On 2026-11-05 the 302 from astro.build/llms.txt pointed at docs.astro.build/llms.txt, so an agent following it ended on a 404; llms-full.txt and llms-small.txt on the docs host also returned 404, and docs pages answered Accept: text/markdown with text/html. [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
AstroOpen-source framework that prerenders content sites to static HTML and adds on-demand rendering through server adapters.Free, open source
MIT License, free		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 feature in the Astro docs and release posts read on 2026-11-05; astro.build/llms.txt redirects to a docs URL that answered 404.none
markdown-negotiationno statementNo statement found in the Astro 6.0, 7.0 and 7.4 posts; docs.astro.build answered Accept: text/markdown with text/html.none
markdown-twinno statementNo .md output per page found in the Astro docs read; Markdown sources are compiled to HTML.none
initial-htmlsupportsComponents render to HTML and CSS at build time; client JavaScript only for client:* islands.source
real-404supports404.astro serves unmatched routes; hand-built entrypoints need the notFound() handler added in 7.4.source
vary-acceptno statementNo statement found on Vary: Accept in the Astro docs pages and release posts read.none

Checks on its own site

Readings of astro.build, the vendor's own website, which describe that site and not the product.
ReadingResultDate
Home page requestHTTP 200; H1 in the initial HTML: yes; 809 words; 0 JSON-LD blocks2026-11-05
Request with Accept: text/markdownHTTP 200, text/html, no Vary header2026-11-05
/llms.txt at the host rootHTTP 404, no content type, 0 B2026-11-05
A made-up pathHTTP 4042026-11-05
Ora score, cached52, grade C2026-08-29
Cloudflare keyless scan20, L1 Basic Web Presence2026-11-05
Shared crawl rowoutside the ranked slice; home page HTTP 200; H1 in the HTML: yes; 992 words; JSON-LD types: none; answers markdown: no; made-up path HTTP 404; llms.txt valid: no2026-11-04

What it does not do

  • Astro's default build writes no llms.txt and no markdown copy of a page, and the Astro 7.0 and 7.4 release posts add neither despite the Cloudflare ownership.

Related pages on this site

Sources

  1. Astro: home page https://astro.build/, read 5 November 2026
  2. The Astro Technology Company joins Cloudflare https://astro.build/blog/joining-cloudflare/, read 5 November 2026
  3. Cloudflare Donates $150,000 to Support Astro's Open Source Mission https://astro.build/blog/cloudflare-official-partner/, read 5 November 2026
  4. Astro 6.0 https://astro.build/blog/astro-6/, read 5 November 2026
  5. Astro 7.0 https://astro.build/blog/astro-7/, read 5 November 2026
  6. Astro 7.4 https://astro.build/blog/astro-740/, read 5 November 2026
  7. Islands architecture https://docs.astro.build/en/concepts/islands/, read 5 November 2026
  8. @astrojs/sitemap https://docs.astro.build/en/guides/integrations-guide/sitemap/, read 5 November 2026
  9. What's new in Astro - August 2026 https://astro.build/blog/whats-new-august-2026/, read 5 November 2026
  10. astro.build llms.txt and markdown checks (observed) https://astro.build/llms.txt, read 5 November 2026

Last reviewed 5 November 2026