Fix: Markdown twin carries YAML frontmatter

Web-audit fix skill for the markdown-frontmatter check (Content for agents, MAY).

Goal

Prefix the markdown twin with a YAML frontmatter block so agents read page metadata without parsing the body.

Fix

Open each markdown twin with a YAML frontmatter block: a --- fence line, title, description, and a canonical url key, then a closing --- fence, before the first heading. An agent then lifts the page's title, summary, and canonical URL from structured keys instead of inferring them from prose, which is both cheaper and less error-prone. Keep the block well-formed: an opened fence with no terminator, or a fence pair with no keys, is worse than no frontmatter because it misleads a parser.

Resources

• YAML front matter (Jekyll)
• RFC 7763 (text/markdown)

Copy-paste prompt

Paste this into your coding agent. Your audit adds what it observed for this check:

Verify

Re-run the audit at https://anc.dev/audit or call the audit_website MCP tool; the markdown-frontmatter check should report pass.