Manual Setup

The quickest way to create a new Starlight site is using create astro as shown in the Getting Started guide. If you want to add Starlight to an existing Astro project, this guide will explain how.

Set up Starlight

To follow this guide, you’ll need an existing Astro project.

Add the Starlight integration

Starlight is an Astro integration. Add it to your site by running the astro add command in your project’s root directory:

npm

npx astro add starlight

pnpm

pnpm astro add starlight

Yarn

yarn astro add starlight

This will install the required dependencies and add Starlight to the integrations array in your Astro config file.

Configure the integration

The Starlight integration is configured in your astro.config.mjs file.

Add a title to get started:

astro.config.mjs

import { defineConfig } from 'astro/config';
import starlight from '@astrojs/starlight';

export default defineConfig({
  integrations: [
    starlight({
      title: 'My delightful docs site',
    }),
  ],
});

Find all available options in the Starlight configuration reference.

Configure content collections

Starlight is built on top of Astro’s content collections, which are configured in the src/content.config.ts file.

Create or update the content config file, adding a docs collection that uses Starlight’s docsLoader and docsSchema:

src/content.config.ts

import { defineCollection } from 'astro:content';
import { docsLoader } from '@astrojs/starlight/loaders';
import { docsSchema } from '@astrojs/starlight/schema';

export const collections = {
  docs: defineCollection({ loader: docsLoader(), schema: docsSchema() }),
};

Starlight also supports the legacy.collections flag where collections are handled using the legacy content collections implementation. This is useful if you have an existing Astro project and are unable to make any changes to collections at this time to use a loader.

Add content

Starlight is now configured and it’s time to add some content!

Create a src/content/docs/ directory and start by adding an index.md file. This will be the homepage of your new site:

src/content/docs/index.md

---
title: My docs
description: Learn more about my project in this docs site built with Starlight.
---

Welcome to my project!

Starlight uses file-based routing, which means every Markdown, MDX, or Markdoc file in src/content/docs/ will turn into a page on your site. Frontmatter metadata (the title and description fields in the example above) can change how each page is displayed. See all the available options in the frontmatter reference.

Tips for existing sites

If you have an existing Astro project, you can use Starlight to quickly add a documentation section to your site.

Use Starlight at a subpath

To add all Starlight pages at a subpath, place all your docs content inside a subdirectory of src/content/docs/.

For example, if Starlight pages should all start with /guides/, add your content in the src/content/docs/guides/ directory:

• Directorysrc/

  • Directorycontent/

    • Directorydocs/

      • Directoryguides/

        • guide.md
        • index.md
  • Directorypages/

    • …
• astro.config.mjs

In the future, we plan to support this use case better to avoid the need for the extra nested directory in src/content/docs/.

Use Starlight with SSR

To enable SSR, follow the “On-demand Rendering Adapters” guide in Astro’s docs to add a server adapter to your Starlight project.

Documentation pages generated by Starlight are pre-rendered by default regardless of your project’s output mode. To opt out of pre-rendering your Starlight pages, set the prerender config option to false.