Agent Skills: Document Rag Pipeline

Document Rag Pipeline

Overview

This skill creates a complete Retrieval-Augmented Generation (RAG) system from a folder of documents. It handles:

• Regular PDF text extraction
• OCR for scanned/image-based PDFs
• DRM-protected file detection
• Text chunking with overlap
• Vector embedding generation
• SQLite storage with full-text search
• Semantic similarity search

Quick Start

# Install dependencies
pip install PyMuPDF pytesseract Pillow sentence-transformers numpy tqdm

# Build knowledge base
python build_knowledge_base.py /path/to/documents --embed

# Search documents
python build_knowledge_base.py /path/to/documents --search "your query"

When to Use

• Building searchable knowledge bases from document folders
• Processing technical standards libraries (API, ISO, ASME, etc.)
• Creating semantic search over engineering documents
• OCR processing of scanned historical documents
• Any collection of PDFs needing intelligent search

Prerequisites

System Dependencies

# Ubuntu/Debian
sudo apt-get update
sudo apt-get install -y tesseract-ocr tesseract-ocr-eng poppler-utils

# macOS
brew install tesseract poppler

# Verify Tesseract
tesseract --version  # Should show 5.x

Python Dependencies

pip install PyMuPDF pytesseract Pillow sentence-transformers numpy tqdm

Or with UV:

uv pip install PyMuPDF pytesseract Pillow sentence-transformers numpy tqdm

Related Skills

• pdf-text-extractor - Just text extraction
• semantic-search-setup - Just embeddings/search
• rag-system-builder - Add LLM Q&A layer
• knowledge-base-builder - Simpler document catalog

Version History

• 1.1.0 (2026-01-02): Added Quick Start, Execution Checklist, Error Handling, Metrics sections; updated frontmatter with version, category, related_skills
• 1.0.0 (2024-10-15): Initial release with OCR support, chunking, vector embeddings, semantic search

Sub-Skills

• Build Knowledge Base (+2)

Sub-Skills

• Execution Checklist
• Error Handling
• Metrics

Sub-Skills

• Architecture
• Step 1: Database Schema (+5)
• Complete Pipeline Script
• Performance Metrics (Real-World)