More vertical breathing room between paragraphs (8→12), list items (2→6), headings (increased top/bottom). Tighter horizontal indent on lists (16→8) and blockquotes (12→8). Added HTML entity unescaping (quot, amp, lt, gt, apos) before parsing. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>