Completed "Building and Evaluating Advanced RAG" by DeepLearning.AI (TruEra, LlamaIndex).
The most useful part wasn't building another RAG pipeline, it was learning how to actually evaluate one. The RAG Triad (answer relevance, context relevance, groundedness) gives you a way to...
When I built a hybrid retrieval system, I learned semantic search alone misses exact matches, things like IDs, codes, or specific terms that don't need "understanding," just exact lookup.