The RAG Pipeline

1. The Request Path, End to End

Ingestion built the library. This lesson is about what happens the moment a question walks in the door. The pipeline runs five stages, and naming them separately is not pedantry, it matters. Each one fails in its own way, gets tuned in its own way, and gets evaluated in its own way. "Where in the pipeline is this failure?" is both the question production engineers ask every day and the question the interview deep-dive is really testing.