--- title: "SvelteKit: vendor profile: Agent Ready HTML" description: "SvelteKit, a framework: 2 of 6 standards stated as supported, 18 sourced facts, dated plans and what it does not do. Read 2026-11-05." canonical: https://agentreadyhtml.com/vendors/sveltekit/ site: "Agent Ready HTML" last_updated: 2026-11-05 section: "Vendors" --- # SvelteKit: vendor profile: Agent Ready HTML > SvelteKit, a framework: 2 of 6 standards stated as supported, 18 sourced facts, dated plans and what it does not do. Read 2026-11-05. Source: https://agentreadyhtml.com/vendors/sveltekit/ Site: Agent Ready HTML Last reviewed: 2026-11-05 # SvelteKit: vendor profile In short A default SvelteKit 3.1.1 app built on 2026-11-05 served its home H1 in the raw HTML and answered a made-up path with 404, but returned HTML to Accept: text/markdown and no llms.txt, sitemap.xml or 404.html. The llms.txt files on svelte.dev cover the Svelte documentation only. SvelteKit 3.0 was announced on 1 October 2026. ## At a glance **standards.txt** sveltekit ```text 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. **SvelteKit** Framework SvelteKit is the official application framework for Svelte. Pages are server-rendered or prerendered by default, so an agent fetching the raw HTML gets the content, and unmatched routes return a real 404. Type [Framework](https://agentreadyhtml.com/vendors/by-type/framework/) Home page [svelte.dev/docs/kit](https://svelte.dev/docs/kit), answered HTTP 200 on 2026-11-05 Last read 5 November 2026 ## What it does for this layer - SvelteKit 3.0 was announced on the Svelte blog on 1 October 2026, which calls SvelteKit the official application framework for Svelte. \[primary source, 2026-10-01\] [source](https://svelte.dev/blog/sveltekit-3-is-here), read 5 November 2026. - SvelteKit 3 moved project configuration out of svelte.config.js into the Vite config file, and renamed the $lib alias to #lib. \[primary source, 2026-10-01\] [source](https://svelte.dev/blog/sveltekit-3-is-here), read 5 November 2026. - The @sveltejs/kit 3.1.1 patch release was published on GitHub on 29 October 2026; one listed fix makes reroute return HTTP 400 for a malformed pathname instead of throwing. \[primary source, 2026-10-29\] [source](https://github.com/sveltejs/kit/releases/tag/%40sveltejs%2Fkit%403.1.1), read 5 November 2026. - SvelteKit's page options docs say every component is rendered (or prerendered) on the server first and sent as HTML, then hydrated in the browser by a client-side router. \[primary source\] [source](https://svelte.dev/docs/kit/page-options), read 5 November 2026. - SvelteKit prerendering is set per route with export const prerender = true, false or 'auto'; adapter-static prerenders the whole site into files for any static web server. \[primary source\] [source](https://svelte.dev/docs/kit/page-options), read 5 November 2026. - The SvelteKit SEO page says SSR is on by default and can be switched off in the handle hook, and advises leaving it on. \[primary source\] [source](https://svelte.dev/docs/kit/seo), read 5 November 2026. - SvelteKit sets titles and meta descriptions through a block, with SEO data usually returned from load functions and read in the root layout. \[primary source\] [source](https://svelte.dev/docs/kit/seo), read 5 November 2026. - SvelteKit has no built-in sitemap generator; the SEO docs show a hand-written src/routes/sitemap.xml/+server endpoint that returns XML. \[primary source\] [source](https://svelte.dev/docs/kit/seo), read 5 November 2026. - SvelteKit itself answers a request that matches no route with status 404 and passes it to the handleError hook with kind 'framework'; the error(404) helper does the same from a load function and renders +error.svelte. \[primary source\] [source](https://svelte.dev/docs/kit/errors), read 5 November 2026. - SvelteKit's adapter-static fallback option turns the site into a single-page app served from a page such as 200.html, and the adapter docs warn this hurts performance and SEO. \[primary source\] [source](https://svelte.dev/docs/kit/adapter-static), read 5 November 2026. - SvelteKit redirects URLs to one trailing-slash form (with or without, per the trailingSlash option) so duplicate URLs are not indexed. \[primary source\] [source](https://svelte.dev/docs/kit/seo), read 5 November 2026. - svelte.dev states support for the llms.txt convention and publishes /llms.txt plus llms-full.txt, llms-medium.txt and llms-small.txt, with package files such as /docs/kit/llms.txt. \[primary source\] [source](https://svelte.dev/docs/llms), read 5 November 2026. - On 2026-11-05 https://svelte.dev/llms.txt returned 200 text/plain at 1,676 bytes and https://svelte.dev/llms-full.txt returned 1,272,878 bytes, while the svelte.dev home page answered Accept: text/markdown with text/html. \[observed, 2026-11-05\] [source](https://svelte.dev/docs/llms), read 5 November 2026. - The Svelte team maintains an official MCP server for coding agents, alongside agent instructions, skills and subagents, documented under svelte.dev/docs/ai. \[primary source\] [source](https://svelte.dev/docs/ai/overview), read 5 November 2026. - The sveltejs/kit repository is published under the MIT license, with a copyright line dating from 2020. \[primary source\] [source](https://github.com/sveltejs/kit), read 5 November 2026. ## Test build - A default SvelteKit 3.1.1 app made on 2026-11-05 with \`npx sv@1.3.0 create --template minimal --types ts --no-add-ons --install npm sk-app\`, then \`npm run build\` and \`npx vite preview\`, served the home page H1 "Welcome to SvelteKit" in the raw HTML and answered /made-up-path-xyz with status 404. \[observed, 2026-11-05\] [source](https://svelte.dev/docs/kit/page-options), read 5 November 2026. - In the same SvelteKit 3.1.1 preview on 2026-11-05, a request for / with Accept: text/markdown still got text/html with only Vary: Origin, and /llms.txt, /sitemap.xml and /404.html all returned 404; the template ships a static/robots.txt that allows all crawling. \[observed, 2026-11-05\] [source](https://svelte.dev/docs/kit/seo), read 5 November 2026. - The default SvelteKit template uses @sveltejs/adapter-auto, which on a local \`npm run build\` on 2026-11-05 printed a warning that no supported production environment was detected. \[observed, 2026-11-05\] [source](https://svelte.dev/docs/kit/adapters), read 5 November 2026. ## Products and plans | Product | What it is | Price | As of | Source | | --- | --- | --- | --- | --- | | SvelteKit | Open source application framework for Svelte with server rendering, prerendering and deploy adapters. | Free, open source; MIT license | 2026-11-05 | source | ## Standards | Standard | Status | What the vendor's pages say | Source | | --- | --- | --- | --- | | llms-txt | no statement | No statement found in the SvelteKit page options, SEO, adapters or adapter-static docs about generating llms.txt for an app; svelte.dev serves its own /llms.txt for the Svelte docs. | none | | markdown-negotiation | no statement | No statement found in the SvelteKit page options, SEO, errors or adapter docs; a default 3.1.1 vite preview answered Accept: text/markdown with text/html on 2026-11-05. | none | | markdown-twin | no statement | No statement found in the SvelteKit page options, SEO or adapter docs about .md copies of app pages. | none | | initial-html | supports | The page options docs say components render on the server first and are sent as HTML; prerender and adapter-static write static HTML. | source | | real-404 | supports | The errors docs class a request that matches no route as a framework error with status 404; error(404) in load sets the response status. | source | | vary-accept | no statement | No statement found in the SvelteKit SEO or adapter docs; the vite preview server for the default template sent Vary: Origin only. | none | ## Checks on its own site Plain-fetch checks ran on https://svelte.dev/docs/kit; the Ora and Cloudflare scores cover the whole host svelte.dev. | Reading | Result | Date | | --- | --- | --- | | Home page request | HTTP 200; H1 in the initial HTML: yes; 397 words; 0 JSON-LD blocks | 2026-11-05 | | Request with Accept: text/markdown | HTTP 200, text/html, no Vary header | 2026-11-05 | | /llms.txt at the host root | HTTP 200, text/plain, 1.6 KB, starts with an H1 | 2026-11-05 | | A made-up path | HTTP 404 | 2026-11-05 | | Ora score, cached | 58, grade C | 2026-09-13 | | Cloudflare keyless scan | 13, L0 Not Ready | 2026-11-05 | ## What it does not do - SvelteKit has no setting that writes an llms.txt for your app; the llms.txt files on svelte.dev cover the Svelte documentation only. ## Related pages on this site - [Frameworks in this section](https://agentreadyhtml.com/vendors/by-type/framework/) - [The Plain Fetch viewer](https://agentreadyhtml.com/viewer/) ## Sources 1. [SvelteKit: home page](https://svelte.dev/docs/kit) https://svelte.dev/docs/kit, read 5 November 2026 2. [SvelteKit 3 is here](https://svelte.dev/blog/sveltekit-3-is-here) https://svelte.dev/blog/sveltekit-3-is-here, read 5 November 2026 3. [Release @sveltejs/kit@3.1.1 · sveltejs/kit · GitHub | SvelteKit](https://github.com/sveltejs/kit/releases/tag/%40sveltejs%2Fkit%403.1.1) https://github.com/sveltejs/kit/releases/tag/%40sveltejs%2Fkit%403.1.1, read 5 November 2026 4. [Page options • SvelteKit Docs](https://svelte.dev/docs/kit/page-options) https://svelte.dev/docs/kit/page-options, read 5 November 2026 5. [SEO • SvelteKit Docs](https://svelte.dev/docs/kit/seo) https://svelte.dev/docs/kit/seo, read 5 November 2026 6. [Errors • SvelteKit Docs](https://svelte.dev/docs/kit/errors) https://svelte.dev/docs/kit/errors, read 5 November 2026 7. [Static site generation • SvelteKit Docs](https://svelte.dev/docs/kit/adapter-static) https://svelte.dev/docs/kit/adapter-static, read 5 November 2026 8. [Adapters • SvelteKit Docs](https://svelte.dev/docs/kit/adapters) https://svelte.dev/docs/kit/adapters, read 5 November 2026 9. [Docs for LLMs • Svelte Docs | SvelteKit](https://svelte.dev/docs/llms) https://svelte.dev/docs/llms, read 5 November 2026 10. [Overview • Svelte AI Docs | SvelteKit](https://svelte.dev/docs/ai/overview) https://svelte.dev/docs/ai/overview, read 5 November 2026 11. [sveltejs/kit repository on GitHub](https://github.com/sveltejs/kit) https://github.com/sveltejs/kit, read 5 November 2026 Last reviewed 5 November 2026 Edition Crawl 2026-11-04 Page updated 2026-11-05 Method How the viewer reads a page, how a file is graded and how a platform is scored: [the method page](https://agentreadyhtml.com/method/).