2511 PDF Extract 2c7618f4

/pdf-extract

Extract structured content from PDF documents, preserving headings, tables, images, and formatting. Converts to clean Markdown with metadata frontmatter. Supports two extraction methods: Claude's built-in Read tool (zero dependencies) or docling (superior table recognition and reading order detection).

When to Use This Skill

• Converting PDF reports or specifications into editable Markdown
• Extracting key content from vendor documentation
• Creating structured notes from PDF whitepapers or standards
• Capturing tables and figures from PDF documents
• Processing multi-page PDFs into searchable vault content

Usage

/pdf-extract <path-to-pdf> [--pages 1-10] [--focus summary|full|tables-only] [--method read|docling]

Parameters

Extraction Methods

Auto-detect behaviour: If --method is not specified, check whether docling is installed. If available, use docling. Otherwise, fall back to the Read tool.

Instructions

Phase 1: Assess the PDF

1. Verify the PDF exists at the specified path
2. Determine extraction method:
   • If --method read specified: use Read tool
   • If --method docling specified: use docling (fail with install instructions if not available)
   • If not specified: auto-detect (try docling import, fall back to Read tool)
3. Report to user: "This PDF has X pages. Extracting with [method]."

Phase 2a: Extract with Read Tool

Use this method when docling is not available or --method read is specified.

1. Read the PDF using the Read tool with the pages parameter for large PDFs
   • For PDFs > 10 pages, read in batches of 10-20 pages
   • Note: The Read tool natively supports PDF files
2. Identify document structure:
   • Title and author
   • Table of contents or section headings
   • Tables, charts, and figures
   • Page count and overall organisation
3. Extract metadata:
   • Title, author, date, version
   • Document type (report, specification, whitepaper, standard)
   • Key topics and themes
4. Extract body content:
   • Preserve heading hierarchy (H1, H2, H3)
   • Convert tables to Markdown table syntax
   • Note image/figure locations with [Figure X: Description] placeholders
   • Preserve lists (bulleted and numbered)
   • Maintain paragraph structure
5. Handle special content:
   • Tables: Convert to Markdown tables, noting column headers and alignment
   • Code blocks: Wrap in fenced code blocks with language hints
   • Quotes/callouts: Convert to blockquotes
   • Footnotes: Convert to inline references or endnotes

Phase 2b: Extract with Docling

Use this method when docling is available or --method docling is specified. Docling provides native table recognition, reading order detection, and processes the entire PDF in a single pass.

1. Run docling extraction via Bash:

   from docling.document_converter import DocumentConverter
   import json
   
   converter = DocumentConverter()
   result = converter.convert("<pdf-path>")
   
   # Export structured outputs
   markdown_content = result.document.export_to_markdown()
   doc_dict = result.document.export_to_dict()
   
   # Statistics
   page_count = len(result.document.pages)
   table_count = len(result.document.tables) if hasattr(result.document, 'tables') else 0
   image_count = len(result.document.images) if hasattr(result.document, 'images') else 0
   

2. Save docling outputs for reference:

   • {pdf_dir}/docling_output/{stem}_docling.md — extracted Markdown
   • {pdf_dir}/docling_output/{stem}_docling.json — structured JSON

3. What docling provides automatically:

   • Heading hierarchy preserved from document structure
   • Tables converted to Markdown with correct column alignment
   • Reading order detection (handles multi-column layouts)
   • Code blocks and formulas identified
   • Image position markers (<!-- image -->) at correct locations
   • List structure (bulleted and numbered) preserved
   • Apple Silicon acceleration (~0.85 sec/page on M-series Macs)

4. Post-process the docling output:

   • Extract metadata (title, author, date) from the first page content or PDF properties
   • Replace <!-- image --> markers with [Figure X: Description] placeholders
   • Verify table formatting is clean
   • Add any section context that docling may have missed

Phase 3: Structure Output

Generate a Markdown document with:

1. Frontmatter — Metadata about the source document
2. Summary — AI-generated summary of the document
3. Table of contents — If the document has multiple sections
4. Extracted content — Clean Markdown preserving document structure
5. Key takeaways — Bullet list of the most important points

Output Format

---
type: Reference
title: "<Document Title>"
referenceType: article
created: YYYY-MM-DD
source: "<PDF filename>"
author: "<Author>"
tags: [content/document, domain/relevant-tag]
summary: "<One-line summary>"
processedWith: "<read|docling>"
---

# <Document Title>

> **Source:** <PDF filename> | **Pages:** X | **Extracted:** YYYY-MM-DD | **Method:** <Read tool|docling>

## Summary

<2-3 paragraph AI-generated summary>

## Key Takeaways

- <Most important point 1>
- <Most important point 2>
- <Most important point 3>

## Contents

<Extracted content with preserved heading hierarchy>

### Section 1: <Heading>

<Content>

| Column A | Column B | Column C |
|----------|----------|----------|
| Data     | Data     | Data     |

[Figure 1: <Description of figure>]

### Section 2: <Heading>

<Content>

---

**Source:** `<path-to-pdf>`

Examples

Example 1: Full Extraction (Auto-Detect)

/pdf-extract ~/Documents/cloud-migration-guide.pdf

Auto-detects whether docling is installed. If available, processes the entire document in one pass with native table recognition. Otherwise falls back to the Read tool.

Example 2: Specific Pages

/pdf-extract ~/Documents/annual-report.pdf --pages 15-30

Extracts only pages 15-30 (e.g., the technical appendix). Works with both methods.

Example 3: Tables Only

/pdf-extract ~/Documents/vendor-comparison.pdf --focus tables-only

Extracts only tables from the document. Docling is recommended for this — its native table recognition produces cleaner results than visual extraction.

Example 4: Force Docling

/pdf-extract ~/Documents/complex-spec.pdf --method docling

Explicitly use docling for a complex document with many tables and multi-column layouts.

Example 5: Force Read Tool

/pdf-extract ~/Documents/simple-memo.pdf --method read

Use the Read tool for a simple document where docling installation is not warranted.

Technical Notes

Docling Installation

pip install docling

• Size: ~250 MB (includes ML models)
• Platforms: macOS (arm64), Linux (x86_64, arm64), Windows
• Licence: MIT
• First run: ~40 seconds (model loading); subsequent runs ~0.85 sec/page

Performance Comparison

When Docling Excels

• Dense tables — Financial reports, specification matrices, comparison tables
• Multi-column layouts — Academic papers, newsletters, annual reports
• Large documents — 50+ page specifications processed in one pass
• Batch processing — Process many PDFs locally without API costs
• Scanned PDFs — Automatic OCR (uses ocrmac on macOS)

Error Handling

Invoke with: /pdf-extract <path-to-pdf> to convert PDF content to structured Markdown