@astrojs/markdoc/template/content-module-types.d.ts

Add support for Markdoc in your Astro site

declare module 'astro:content' {
	interface Render {
		'.mdoc': Promise<{
			Content(props: Record<string, any>): import('astro').MarkdownInstance<{}>['Content'];
			headings: import('astro').MarkdownHeading[];
		}>;
	}
}