The unified MarkdownParser returns all headings (h1-h6) and all paragraphs without length filtering. Apply the documented behaviour at the call site: - Exclude h1 from the headings list (return h2-h6 only) - Filter out paragraphs shorter than 20 characters from content Fixes test_extract_headings_h2_to_h6 and test_extract_content_paragraphs. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>