Document PDF Skill — Quick Reference

This skill enables PDF creation, extraction, manipulation, and analysis. Claude should apply these patterns when users need to generate invoices, reports, extract data from PDFs, merge documents, or work with PDF forms.

Modern Best Practices (Jan 2026):

• PDF is a release artifact, not the editable source of truth.
• Validate export fidelity (fonts, images, links) and accessibility where required.
• Accessibility: if compliance matters, target a tagged/structured PDF workflow (often PDF/UA-aligned) and validate with tooling.
• EU distribution: EAA (June 2025) typically implies EN 301 549 expectations for customer-facing PDFs.
• Treat PDFs as sensitive: scrub metadata, ensure real redaction, and control distribution.

Core Decision Rules (2026)

• First decide: born-digital PDF (selectable text) vs scanned PDF (images). Scanned PDFs usually require OCR; see references/pdf-extraction-patterns.md.
• If the user needs accessibility/compliance, prefer generating from a source format that supports structure (DOCX/HTML + proper export) rather than “post-fixing” an untagged PDF.
• For deterministic ops (merge/split/rotate/scrub), prefer scripts/ helpers over re-implementing ad hoc.
• Never treat black rectangles or overlays as redaction; use real redaction and verify by copy/paste + search.

Quick Reference

When to Use This Skill

Claude should invoke this skill when a user requests:

• Generate PDFs from data (invoices, reports, certificates)
• Extract text or tables from existing PDFs
• Merge multiple PDFs into one document
• Split PDFs into separate files
• Fill PDF forms programmatically
• Add watermarks, headers, footers
• Convert HTML/web pages to PDF

Default Workflow

• Create: pick pdfkit (Node) or ReportLab (Python) and start from assets/invoice-template.md or assets/report-template.md; for advanced layouts use references/pdf-generation-patterns.md.
• Extract: use references/pdf-extraction-patterns.md (text/tables/images/metadata + OCR fallback).
• Ship: run assets/pdf-release-checklist.md (fidelity, links, accessibility baseline, privacy).

Scripts (Deterministic Operations)

Scripts are optional helpers; they assume Python 3 plus the listed dependencies in each file.

• Merge: python3 scripts/merge_pdfs.py merged.pdf a.pdf b.pdf
• Split: python3 scripts/split_pdf.py in.pdf out_dir --each-page
• Rotate: python3 scripts/rotate_pdf.py in.pdf out.pdf --degrees 90
• Scrub metadata: python3 scripts/scrub_metadata.py in.pdf out.pdf

PDF Structure Patterns

Invoice Template

INVOICE STRUCTURE
├── Header (logo, company info, invoice #)
├── Bill To / Ship To blocks
├── Line items table
│   ├── Description | Qty | Unit Price | Total
│   └── Subtotal, Tax, Total
├── Payment terms
└── Footer (contact, thank you)

Report Template

REPORT PDF STRUCTURE
├── Cover page (title, author, date)
├── Table of contents
├── Body sections with page numbers
├── Charts/images with captions
├── Appendices
└── Running header/footer

Decision Tree

PDF Task: [What do you need?]
    ├─ Create new PDF?
    │   ├─ Simple text/tables → pdfkit (Node) or ReportLab (Python)
    │   ├─ Complex layouts → ReportLab with Platypus
    │   └─ From HTML → Puppeteer or wkhtmltopdf
    │
    ├─ Extract from PDF?
    │   ├─ Text only → pdfplumber (Python)
    │   ├─ Tables → pdfplumber or camelot (Python)
    │   └─ Images → PyMuPDF/fitz (Python)
    │
    ├─ Modify existing PDF?
    │   ├─ Add text/images → pdf-lib (Node)
    │   ├─ Merge/split → pypdf or pdf-lib
    │   └─ Fill forms → pdf-lib
    │
    └─ Batch processing?
        └─ pypdf + pdfplumber pipeline

Do / Avoid (Jan 2026)

Do

• Keep a versioned source document (doc/slide/design file) alongside the PDF.
• Verify links and reading order for long documents.
• Use real redaction and test by copy/paste.

Avoid

• Editing PDFs as the primary workflow when a source doc exists.
• Shipping PDFs with broken links or illegible charts.
• Including customer PII or secrets in PDFs without explicit approval.

What Good Looks Like

• Fidelity: export is reproducible from a versioned source file (doc/slide/design) and looks identical across viewers.
• Accessibility: tags/reading order are correct; links work; scanned docs are OCRed when appropriate.
• Release hygiene: file naming includes version/date; metadata is clean; no “PDF as source of truth”.
• Security: redaction is verified (copy/paste test) and sensitive data is minimized.
• QA: release checklist completed using assets/pdf-release-checklist.md.

Optional: AI / Automation

Use only when explicitly requested and policy-compliant.

• Generate a release checklist run; humans verify the final PDF manually.

Navigation

Resources

• references/pdf-generation-patterns.md — Complex layouts, multi-page docs
• references/pdf-extraction-patterns.md — Text, table, image extraction
• data/sources.json — Library documentation links

Templates

• assets/invoice-template.md — Invoice PDF generation
• assets/report-template.md — Multi-page report structure
• assets/pdf-release-checklist.md — Links, accessibility, export fidelity

Related Skills

• ../document-docx/SKILL.md — Word document generation
• ../document-xlsx/SKILL.md — Excel/spreadsheet workflows
• ../document-pptx/SKILL.md — PowerPoint presentations