gray_matter mis-parses certain YAML patterns common in Notion-imported notes: - Unquoted colons in list items (`- Bitcoin: Net Unrealized`) become objects - Hash characters in list items (`- # Heading`) become nulls These caused serde deserialization of the entire Frontmatter struct to fail, silently dropping type, _organized, and all other fields (178 affected notes). Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>