1import type { RemarkPlugin } from '@astrojs/markdown-remark';
 2import { toString } from 'mdast-util-to-string';
 3
 4export const remarkExcerpt: RemarkPlugin = function () {
 5  return (tree, { data }) => {
 6    let excerpt = '';
 7    for (const node of tree.children) {
 8      if (node.type !== 'paragraph') {
 9        continue;
10      }
11      excerpt = toString(node);
12      break;
13    }
14    // @ts-expect-error data.astro.frontmatter must be defined
15    data.astro.frontmatter.excerpt = excerpt;
16  };
17};