---
title: "No sitemap (lint/missing-sitemap)"
description: "lint/missing-sitemap: Without a sitemap crawlers discover pages only through links, new or deep pages are indexed slowly and `lastmod` hints for recrawling…"
canonical: https://void-design.vercel.app/rules/lint/missing-sitemap
lastModified: 2026-09-16
---

# No sitemap

`lint/missing-sitemap` · severity **warn** · category Lint · detected by `void lint` and `void audit`

## Why it matters

Without a sitemap crawlers discover pages only through links, new or deep pages are indexed slowly and `lastmod` hints for recrawling are lost.

## How to fix it

Add `app/sitemap.ts` returning every canonical URL with a real `lastModified`.

## Example

```ts
import type { MetadataRoute } from 'next'
export default function sitemap(): MetadataRoute.Sitemap {
  return [{ url: 'https://example.com/', lastModified: '2026-09-01' }]
}
```

## References

- https://nextjs.org/docs/app/api-reference/file-conventions/metadata/sitemap

## More lint rules

`void lint` reports 67 rules in this category. Static source checks with no browser: Tailwind v4 silent failures, Next.js 16 API traps, React render-body bugs, accessibility markup, SEO files and motion hygiene.

- `missing-metadata-base` Root layout metadata has no `metadataBase` — [lint/missing-metadata-base](https://void-design.vercel.app/rules/lint/missing-metadata-base)
- `canonical-in-root-layout` Canonical URL set in the root layout — [lint/canonical-in-root-layout](https://void-design.vercel.app/rules/lint/canonical-in-root-layout)
- `og-merge-drops-parent` Page `openGraph` replaces the layout's (shallow merge drops images/siteName) — [lint/og-merge-drops-parent](https://void-design.vercel.app/rules/lint/og-merge-drops-parent)
- `not-found-in-suspense` `notFound()`/`redirect()` inside a component rendered under `<Suspense>` — [lint/not-found-in-suspense](https://void-design.vercel.app/rules/lint/not-found-in-suspense)
- `missing-robots` No robots.txt — [lint/missing-robots](https://void-design.vercel.app/rules/lint/missing-robots)
- `missing-og-image` No Open Graph image anywhere — [lint/missing-og-image](https://void-design.vercel.app/rules/lint/missing-og-image)
- `missing-icon` No favicon / app icon — [lint/missing-icon](https://void-design.vercel.app/rules/lint/missing-icon)
- `missing-llms-txt` No `/llms.txt` — [lint/missing-llms-txt](https://void-design.vercel.app/rules/lint/missing-llms-txt)

Detected by `void lint` and `void audit`. Explain it in a terminal: `void rules lint/missing-sitemap`