RAG Systems Need 15 Pre-Embedding Steps, Not Just a PDF Upload

Building a production-ready Retrieval-Augmented Generation (RAG) system involves far more than uploading a document and generating embeddings. A technical walkthrough on DEV Community outlines 15 critical document ingestion steps that engineers must complete before embeddings are created. These steps include file hashing, PDF parsing, text cleaning, chunking, deduplication, versioning, and incremental ingestion, among others. Skipping any step can cause the system to return incorrect answers silently, with no obvious indication of failure. The guide emphasizes hashing file content rather than filenames to reliably detect duplicate or updated documents and avoid unnecessary reprocessing costs.