Get the RAG Card

The companion to "If You Don't Understand RAG, You Don't Understand the AI Engineer Interview (Explained in 5 Minutes)". The one-sentence answer to say first, the drawing to do on the whiteboard in six moves (docs → chunks → index, built once; question → search → prompt → model → answer with a source, every question), the headphone-store example from a real run with the no-search control that made up a policy, the three follow-up questions interviewers ask with the answers (why not fine-tune or a bigger context window, how do you chunk, how do you know it works), and the 60-line rag.py that ran it.

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