--- title: "Next.js: agent readability profile: Agent Ready HTML" description: "Next.js scores 7 of 16 on the read-layer rubric: initial HTML, status codes, llms.txt, markdown, JSON-LD, OpenAPI and code. Read 2026-11-04." canonical: https://agentreadyhtml.com/platforms/nextjs-app-router/ site: "Agent Ready HTML" last_updated: 2026-11-04 section: "Platforms" --- # Next.js: agent readability profile: Agent Ready HTML > Next.js scores 7 of 16 on the read-layer rubric: initial HTML, status codes, llms.txt, markdown, JSON-LD, OpenAPI and code. Read 2026-11-04. Source: https://agentreadyhtml.com/platforms/nextjs-app-router/ Site: Agent Ready HTML Last reviewed: 2026-11-04 # Next.js (App Router defaults): what an agent reads In short Next.js does not generate llms.txt. Next.js totals 7 of 16 on the eight numeric keys, from a test build of Next.js 16.4.5. It also does not negotiate markdown without a rewrite and handler. Next.js: In the App Router, layouts and pages are Server Components by default, and Client Components plus the RSC payload are used to prerender HTML. **rubric.txt** nextjs-app-router ```text initial_html_by_default = 2 real_status_codes = 2 llms_txt_generation = 0 llms_txt_linking = 0 markdown_negotiation = 1 jsonld_output = 1 openapi_exposure = 0 fenced_code = 1 total = 7 of 16 ``` Test build of 16.4.5, 2026-11-04. **Next.js (App Router defaults)** Framework, Vercel React framework whose App Router renders Server Components by default and prerenders HTML; markdown negotiation and llms.txt are patterns the developer adds. Work left to the developer: Medium: write llms.txt and a markdown route, add the Accept rewrite, link the file, and keep content in Server Components. ## The nine scores | Key | Score | Evidence | Source | | --- | --- | --- | --- | | Content in the initial HTML | 2, on by default | Test build, Next.js 16.4.5, 2026-11-04: the App Router pages were prerendered as static content with the H1 in the HTML. | nextjs.org/docs/app/getting-started/server-and-client-c…, 2026-11-04 | | Real status codes | 2, on by default | Test build: next start answered a made-up path with 404 directly. notFound() inside a page renders the 404 UI. | nextjs.org/docs/app/api-reference/functions/not-found, 2026-11-04 | | llms.txt generation | 0, not offered | Test build: public/ held only images; no llms.txt, robots.txt or sitemap. A file or a route handler is written by hand. | nextjs.org/docs/app/getting-started/route-handlers, 2026-11-04 | | llms.txt linking | 0, not offered | Test build: nothing links an llms.txt and none exists. | nextjs.org/docs/app/getting-started/route-handlers, 2026-11-04 | | Markdown on request | 1, with setup | Test build: Accept: text/markdown returned text/html. Next.js runs its own server by default, so a rewrite that tests the Accept header, plus a route handler, can answer it without a separate host. | nextjs.org/docs/app/api-reference/config/next-config-js…, 2026-11-04 | | JSON-LD output | 1, with setup | Test build: no JSON-LD emitted. A script element can be rendered from a Server Component. | nextjs.org/docs/app/getting-started/server-and-client-c…, 2026-11-04 | | OpenAPI exposure | 0, not offered | Test build: no OpenAPI file or link; Next.js has no first-party feature for one. | nextjs.org/docs/app/getting-started/route-handlers, 2026-11-04 | | Fenced, tagged code | 1, with setup | Test build: there is no Markdown pipeline without MDX setup; a hand-written code element kept its language class. | nextjs.org/docs/app/guides/mdx, 2026-11-04 | | Work left to the developer | | Medium: write llms.txt and a markdown route, add the Accept rewrite, link the file, and keep content in Server Components. Based on the test build above and the documentation pages cited for each key. | nextjs.org/docs/app/api-reference/config/next-config-js…, 2026-11-04 | ## Test build Next.js 16.4.5, built on 4 November 2026. create-next-app with TypeScript and the App Router, one extra page with a pre and code block, next build, next start. What it emitted: - The home page and /guide were prerendered as static content with the H1 in the HTML. - public/ held only images; no llms.txt, robots.txt or sitemap. - A made-up path returned 404 directly from next start. - Accept: text/markdown on / returned text/html. - There is no Markdown pipeline without MDX setup; a hand-written code element with a language class kept its class. - No JSON-LD and no OpenAPI file. Scoring rules for every key are on the [method page](https://agentreadyhtml.com/method/). ## What the documentation says Each statement below carries its source and the date read. Statements a vendor makes about itself are labelled as vendor claims. - In the App Router, layouts and pages are Server Components by default, and Client Components plus the RSC payload are used to prerender HTML. \[primary source\] [source](https://nextjs.org/docs/app/getting-started/server-and-client-components), read 4 November 2026. - notFound() renders the 404 page and injects a robots noindex meta tag; it must be called in the render path. \[primary source\] [source](https://nextjs.org/docs/app/api-reference/functions/not-found), read 4 November 2026. - Vercel implemented markdown content negotiation on its own Next.js blog and changelog with a rewrite in next.config.ts and a route handler. \[primary source, 2026-02-03\] [source](https://vercel.com/blog/making-agent-friendly-pages-with-content-negotiation), read 4 November 2026. - nextjs.org/docs/llms.txt was 51,255 bytes with 305 links on 2026-11-04. \[primary source\] [source](https://nextjs.org/docs/llms.txt), read 4 November 2026. ## What it does not do - Does not generate llms.txt. - Does not negotiate markdown without a rewrite and handler. ## Compare and replace - [Next.js (App Router defaults) against Astro](https://agentreadyhtml.com/compare/nextjs-app-router-vs-astro/) - [Next.js (App Router defaults) against Nuxt](https://agentreadyhtml.com/compare/nextjs-app-router-vs-nuxt/) - [Alternatives to Next.js (App Router defaults)](https://agentreadyhtml.com/platforms/nextjs-app-router/alternatives/) - [Next.js: vendor profile](https://agentreadyhtml.com/vendors/nextjs/) - [Vercel: vendor profile](https://agentreadyhtml.com/vendors/vercel/) - [Next.js (App Router defaults) home page](https://nextjs.org/) ## Sources 1. [Next.js: Server and Client Components](https://nextjs.org/docs/app/getting-started/server-and-client-components) https://nextjs.org/docs/app/getting-started/server-and-client-components, read 4 November 2026 2. [Next.js: notFound](https://nextjs.org/docs/app/api-reference/functions/not-found) https://nextjs.org/docs/app/api-reference/functions/not-found, read 4 November 2026 3. [Vercel: Making agent-friendly pages with content negotiation](https://vercel.com/blog/making-agent-friendly-pages-with-content-negotiation) https://vercel.com/blog/making-agent-friendly-pages-with-content-negotiation, read 4 November 2026 4. [nextjs.org](https://nextjs.org/docs/llms.txt) https://nextjs.org/docs/llms.txt, read 4 November 2026 5. [nextjs.org](https://nextjs.org/docs/app/getting-started/route-handlers) https://nextjs.org/docs/app/getting-started/route-handlers, read 4 November 2026 6. [nextjs.org](https://nextjs.org/docs/app/api-reference/config/next-config-js/rewrites) https://nextjs.org/docs/app/api-reference/config/next-config-js/rewrites, read 4 November 2026 7. [nextjs.org](https://nextjs.org/docs/app/guides/mdx) https://nextjs.org/docs/app/guides/mdx, read 4 November 2026 8. [nextjs.org](https://nextjs.org/) https://nextjs.org/, read 4 November 2026 Last reviewed 4 November 2026 Edition Crawl 2026-11-04 Page updated 2026-11-04 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/).