Frontmatter support

[groenroos]

With static site generators like Jekyll or Eleventy and others, it's common for a single file to have a YAML document to provide metadata, followed by the content document in an unrelated markup language;

---
title: My page
description: This is my page
permalink: /my-page
---

<h1>Hello</h1>
<p>This is my page</p>

I'd like to use the yaml-lint package to lint the frontmatter document of these files; however, I would ideally want to avoid writing a custom wrapper to iterate through the filesystem, and extract the YAML from each file to be linted individually.

According to this interpretation of the YAML spec, the markup following a YAML document delimiter could be simply ignored.

Is frontmatter support something that could be introduced to this project? Thank you!