Audit and fix PDF accessibility for ADA/Section 508/PDF-UA compliance — auto-generates alt text, link descriptions, structure trees, bookmarks, and metadata. Key features: - 18-check accessibility audit across Critical/Important/Advisory tiers AI-generated alt text for every image (Claude reads pages visually — charts get data descriptions, screenshots get content summaries) - AI-generated link descriptions replacing raw URLs with meaningful text Structure tree generation for untagged PDFs — headings, paragraphs, lists, figures, tables, BDC/EMC marked content, tagged annotations - Metadata auto-population — title, language, author, subject, PDF/UA identifier, display-title flag - Bookmark generation from slide titles Batch processing — process a whole folder, ask for author once, fix everything - Two processing paths — Path A (Acrobat structure tree + plugin fixes) or Path B (fully automated, no Acrobat needed) - Export results as markdown checklists or spreadsheets