--- title: "Starlight: vendor profile | Agent Ready Checklist" description: "Starlight, a docs tool: 2 of 6 checklist rows read are met by default, with 7 sourced facts, dated plans and what it does not do." canonical: https://agentreadychecklist.com/vendors/starlight site: "Agent Ready Checklist" last_updated: 2026-11-05 section: "Vendors" --- # Starlight: vendor profile | Agent Ready Checklist > Starlight, a docs tool: 2 of 6 checklist rows read are met by default, with 7 sourced facts, dated plans and what it does not do. Source: https://agentreadychecklist.com/vendors/starlight Site: Agent Ready Checklist Last reviewed: 2026-11-05 Agent endpoints: https://agentreadychecklist.com/llms.txt (index), https://agentreadychecklist.com/openapi.json (API), https://agentreadychecklist.com/mcp (MCP server), https://agentreadychecklist.com/ask (search) Access: https://agentreadychecklist.com/auth.md (no key). Pricing: https://agentreadychecklist.com/pricing.md (free). # Starlight Starlight is the MIT-licensed documentation theme and integration of the Astro project. Sitemap generation turns on once the site URL is set, pages prerender through Astro, which meets AR-READ-01, and code blocks render with Expressive Code, which meets AR-READ-05. No llms.txt generator is documented, and releases have stayed at 0.x. ## At a glance Type [Docs tool](https://agentreadychecklist.com/vendors/by-type/docs-tool/) Operator Cloudflare Homepage [starlight.astro.build](https://starlight.astro.build), answered HTTP 200 on 2026-11-05 Checklist rows 6 of 31 read: **2** supported, 1 partial, 3 no statement Last read 2026-11-05 ## What it does for this layer - Starlight 0.42.9 was published to npm on 2026-11-04, the day before this profile was read, under the MIT licence. primary source, 2026-11-04: [registry.npmjs.org/@astrojs/starlight](https://registry.npmjs.org/@astrojs/starlight), read 2026-11-05 - Starlight has stayed on 0.x versions since its first npm publish on 2023-05-08. observed, 2023-05-08: [registry.npmjs.org/@astrojs/starlight](https://registry.npmjs.org/@astrojs/starlight), read 2026-11-05 - Starlight docs state "Starlight has built-in support for generating a sitemap", turned on by setting the site URL in astro.config.mjs. primary source: [starlight.astro.build/guides/customization/](https://starlight.astro.build/guides/customization/), read 2026-11-05 - Starlight has built-in support for social links in the site header through the social option of the integration. primary source: [starlight.astro.build/guides/customization/](https://starlight.astro.build/guides/customization/), read 2026-11-05 - A GET of https://starlight.astro.build/llms.txt with the network user agent on 2026-11-05 returned a 404 page. observed: [starlight.astro.build/llms.txt](https://starlight.astro.build/llms.txt), read 2026-11-05 - Starlight inherits Astro's ownership: the Astro Technology Company announced in January 2026 that it is joining Cloudflare. primary source: [astro.build/blog/joining-cloudflare/](https://astro.build/blog/joining-cloudflare/), read 2026-11-05 - Starlight renders code blocks with Expressive Code, documented under "Expressive Code features" in its authoring guide. primary source: [starlight.astro.build/guides/authoring-content/](https://starlight.astro.build/guides/authoring-content/), read 2026-11-05 ## Products and plans | Product | What it is | Price | As of | | --- | --- | --- | --- | | Starlight | Open-source documentation framework built on Astro. | Free, open source; MIT licence; registry.npmjs.org/@astrojs/starlight | 2026-11-05 | ## Standards | Row | What it asks | Status | What the vendor's pages say | Source | | --- | --- | --- | --- | --- | | AR-FIND-03 | Sitemap listed in robots.txt | partial | Sitemap generation is built in and turns on when site is set. | starlight.astro.build/guides/customization/ | | AR-READ-01 | Answer in the initial HTML | supports | Starlight runs on Astro, which prerenders pages to HTML unless a route opts into on-demand rendering. | docs.astro.build/en/guides/on-demand-rendering/ | | AR-READ-05 | Fenced, language-tagged code | supports | Code blocks are rendered with Expressive Code features by default. | starlight.astro.build/guides/authoring-content/ | | AR-READ-07 | Ship llms.txt | no statement | No built-in llms.txt generator is documented. | none | | AR-ACT-03 | MCP over Streamable HTTP | no statement | No MCP feature is documented. | none | | CF-MARKDOWN-NEGOTIATION | Markdown by Accept | no statement | Static output cannot negotiate by Accept. | none | ## Checks on its own site | Reading | Result | Date | Source | | --- | --- | --- | --- | | Cloudflare scan of starlight.astro.build | 7 of 100, band L0 Not Ready | 2026-11-05 | isitagentready.com | ## What it does not do - Starlight does not publish llms.txt or markdown copies of pages without a community plugin. - Starlight has not reached version 1.0; its releases stayed at 0.x through November 2026. ## Related pages on this site Recipes [Astro](https://agentreadychecklist.com/platforms/astro/) ([checklist view](https://agentreadychecklist.com/platform/astro/checklist/)) Same recipe page [Astro](https://agentreadychecklist.com/vendors/astro/) Same type [Docs tools](https://agentreadychecklist.com/vendors/by-type/docs-tool/), [all vendors](https://agentreadychecklist.com/vendors/) ## Sources - [starlight.astro.build](https://starlight.astro.build)read 2026-11-05 - [registry.npmjs.org/@astrojs/starlight](https://registry.npmjs.org/@astrojs/starlight)read 2026-11-05 - [starlight.astro.build/guides/customization/](https://starlight.astro.build/guides/customization/)read 2026-11-05 - [starlight.astro.build/llms.txt](https://starlight.astro.build/llms.txt)read 2026-11-05 - [astro.build/blog/joining-cloudflare/](https://astro.build/blog/joining-cloudflare/)read 2026-11-05 - [starlight.astro.build/guides/authoring-content/](https://starlight.astro.build/guides/authoring-content/)read 2026-11-05 - [docs.astro.build/en/guides/on-demand-rendering/](https://docs.astro.build/en/guides/on-demand-rendering/)read 2026-11-05 - [isitagentready.com](https://isitagentready.com/)read 2026-11-05 Edition Data 2026-11-04 Reviewed 2026-11-05 Spec AgentReady v2.0, 273d2d7 Crawl 13,071 rows, 2026-11-04 Ora 132 checks, contract 1.38.0, 2026-11-05 Verify with Ora The scanner this site recommends for the whole checklist. 132 checks, a score out of 100, no account. `npx ax@0.10 audit --min-score ` [Why Ora, and its limits](https://agentreadychecklist.com/verify-with-ora/) Method - [How rows, commands and rates are made](https://agentreadychecklist.com/method/) - [How an Ora check is matched to a row](https://agentreadychecklist.com/checklist/ora-checks/) - [Pass rates by rank band](https://agentreadychecklist.com/data/by-rank/) Sources and read dates sit at the foot of the page. Last reviewed 2026-11-05. AgentReady v2.0, read 2026-11-04.