Each set of notes covers one episode end to end — same structure, same diagrams, same colours. Nothing here is a transcript; it is the thing you would have written down if you had been taking notes properly.
You built a RAG chatbot for an airline. How do you know it works? Recall, precision, faithfulness, answer relevance, correctness, safety, speed and cost — what each one asks, where in the stack you measure it, and how the whole suite fits together.