docs: content collection config changes

docs/src/content/docs/guides/i18n.mdx

@@ -188,16 +188,16 @@ You can provide translations for additional languages you support — or overrid
 
 <Steps>
 
-1. Configure the `i18n` data collection in `src/content/config.ts` if it isn’t configured already:
+1. Configure the `i18n` data collection in `src/content.config.ts` if it isn’t configured already:
 
-   ```diff lang="js" ins=/, (i18nSchema)/
-   // src/content/config.ts
-   import { defineCollection } from 'astro:content';
+   ```diff lang="js" ins=/, (i18nLoader|i18nSchema)/
+   // src/content.config.ts
+   import { docsLoader, i18nLoader } from '@astrojs/starlight/loader';
    import { docsSchema, i18nSchema } from '@astrojs/starlight/schema';
 
    export const collections = {
-   	docs: defineCollection({ schema: docsSchema() }),
-   +	i18n: defineCollection({ type: 'data', schema: i18nSchema() }),
+   	docs: defineCollection({ loader: docsLoader(), schema: docsSchema() }),
+   +	i18n: defineCollection({ loader: i18nLoader(), schema: i18nSchema() }),
    };
    ```
 
@@ -257,14 +257,15 @@ Add custom keys to your site’s translation dictionaries by setting `extend` in
 In the following example, a new, optional `custom.label` key is added to the default keys:
 
 ```diff lang="js"
-// src/content/config.ts
+// src/content.config.ts
 import { defineCollection, z } from 'astro:content';
+import { docsLoader, i18nLoader } from '@astrojs/starlight/loader';
 import { docsSchema, i18nSchema } from '@astrojs/starlight/schema';
 
 export const collections = {
-	docs: defineCollection({ schema: docsSchema() }),
+	docs: defineCollection({ loader: docsLoader(), schema: docsSchema() }),
 	i18n: defineCollection({
-		type: 'data',
+		loader: i18nLoader(),
 		schema: i18nSchema({
 +			extend: z.object({
 +				'custom.label': z.string().optional(),

docs/src/content/docs/guides/project-structure.mdx

@@ -10,7 +10,7 @@ Starlight projects generally follow the same file and directory structure as oth
 ## Files and directories
 
 - `astro.config.mjs` — The Astro configuration file; includes the Starlight integration and configuration.
-- `src/content/config.ts` — Content collections configuration file; adds Starlight’s frontmatter schemas to your project.
+- `src/content.config.ts` — Content collections configuration file; adds Starlight’s frontmatter schemas to your project.
 - `src/content/docs/` — Content files. Starlight turns each `.md`, `.mdx` or `.mdoc` file in this directory into a page on your site.
 - `src/content/i18n/` (optional) — Translation data to support [internationalization](/guides/i18n/).
 - `src/` — Other source code and files (components, styles, images, etc.) for your project.
@@ -39,8 +39,7 @@ import { FileTree } from '@astrojs/starlight/components';
         - 01-getting-started.md
         - 02-advanced.md
       - index.mdx
-    - config.ts
-  - env.d.ts
+  - content.config.ts
 - astro.config.mjs
 - package.json
 - tsconfig.json

docs/src/content/docs/guides/site-search.mdx

@@ -124,18 +124,19 @@ Add translations of the modal UI for your language using Starlight’s built-in
 
 <Steps>
 
-1. Extend Starlight’s `i18n` content collection definition with the DocSearch schema in `src/content/config.ts`:
+1. Extend Starlight’s `i18n` content collection definition with the DocSearch schema in `src/content.config.ts`:
 
-   ```js ins={4} ins=/{ extend: .+ }/
-   // src/content/config.ts
+   ```js ins={5} ins=/{ extend: .+ }/
+   // src/content.config.ts
    import { defineCollection } from 'astro:content';
+   import { docsLoader, i18nLoader } from '@astrojs/starlight/loader';
    import { docsSchema, i18nSchema } from '@astrojs/starlight/schema';
    import { docSearchI18nSchema } from '@astrojs/starlight-docsearch/schema';
 
    export const collections = {
-   	docs: defineCollection({ schema: docsSchema() }),
+   	docs: defineCollection({ loader: docsLoader(), schema: docsSchema() }),
    	i18n: defineCollection({
-   		type: 'data',
+   		loader: i18nLoader(),
    		schema: i18nSchema({ extend: docSearchI18nSchema() }),
    	}),
    };

docs/src/content/docs/manual-setup.mdx

@@ -62,17 +62,18 @@ Find all available options in the [Starlight configuration reference](/reference
 
 ### Configure content collections
 
-Starlight is built on top of Astro’s [content collections](https://docs.astro.build/en/guides/content-collections/), which are configured in the `src/content/config.ts` file.
+Starlight is built on top of Astro’s [content collections](https://docs.astro.build/en/guides/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 `docsSchema`:
+Create or update the content config file, adding a `docs` collection that uses Starlight’s `docsLoader` and `docsSchema`:
 
-```js ins={3,6}
-// src/content/config.ts
+```js ins={3,7}
+// src/content.config.ts
 import { defineCollection } from 'astro:content';
+import { docsLoader } from '@astrojs/starlight/loader';
 import { docsSchema } from '@astrojs/starlight/schema';
 
 export const collections = {
-	docs: defineCollection({ schema: docsSchema() }),
+	docs: defineCollection({ loader: docsLoader(), schema: docsSchema() }),
 };
 ```
 

docs/src/content/docs/reference/frontmatter.md

@@ -397,19 +397,20 @@ sidebar:
 
 ## Customize frontmatter schema
 
-The frontmatter schema for Starlight’s `docs` content collection is configured in `src/content/config.ts` using the `docsSchema()` helper:
+The frontmatter schema for Starlight’s `docs` content collection is configured in `src/content.config.ts` using the `docsSchema()` helper:
 
-```ts {3,6}
-// src/content/config.ts
+```ts {4,7}
+// src/content.config.ts
 import { defineCollection } from 'astro:content';
+import { docsLoader, i18nLoader } from '@astrojs/starlight/loader';
 import { docsSchema } from '@astrojs/starlight/schema';
 
 export const collections = {
-  docs: defineCollection({ schema: docsSchema() }),
+  docs: defineCollection({ loader: docsLoader(), schema: docsSchema() }),
 };
 ```
 
-Learn more about content collection schemas in [“Defining a collection schema”](https://docs.astro.build/en/guides/content-collections/#defining-a-collection-schema) in the Astro docs.
+Learn more about content collection schemas in [“Defining a collection schema”](https://docs.astro.build/en/guides/content-collections/#defining-the-collection-schema) in the Astro docs.
 
 `docsSchema()` takes the following options:
 
@@ -423,13 +424,15 @@ The value should be a [Zod schema](https://docs.astro.build/en/guides/content-co
 
 In the following example, we provide a stricter type for `description` to make it required and add a new optional `category` field:
 
-```ts {8-13}
-// src/content/config.ts
+```ts {10-15}
+// src/content.config.ts
 import { defineCollection, z } from 'astro:content';
+import { docsLoader } from '@astrojs/starlight/loader';
 import { docsSchema } from '@astrojs/starlight/schema';
 
 export const collections = {
   docs: defineCollection({
+    loader: docsLoader(),
     schema: docsSchema({
       extend: z.object({
         // Make a built-in field required instead of optional.
@@ -444,13 +447,15 @@ export const collections = {
 
 To take advantage of the [Astro `image()` helper](https://docs.astro.build/en/guides/images/#images-in-content-collections), use a function that returns your schema extension:
 
-```ts {8-13}
-// src/content/config.ts
+```ts {10-15}
+// src/content.config.ts
 import { defineCollection, z } from 'astro:content';
+import { docsLoader } from '@astrojs/starlight/loader';
 import { docsSchema } from '@astrojs/starlight/schema';
 
 export const collections = {
   docs: defineCollection({
+    loader: docsLoader(),
     schema: docsSchema({
       extend: ({ image }) => {
         return z.object({