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A RAG chatbot, line by line in Python

Walk a small RAG chatbot in Python in the order it runs: four methods once, four on every question. Then three live runs, and the three gaps they leave.

A clay code tablet whose rows light teal one by one toward a speech bubble, under A RAG Chatbot, Line by Line.
Mohammad Mahdi Mohajer
Mohammad Mahdi Mohajer
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Eight stacked clay bars like lines of code; the seventh glows teal as chat bubbles drop into it, beside RAG in 8 Lines.
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RAG in 8 lines, and where memory goes

The eight stages of a basic RAG chatbot, one line of code each. Why the closest chunks are not the answer, and the one line that changes to give it memory.

A teal clay scale: a chat bubble on one pan, an open book under a magnifier on the other, above Sure Is Not Checked.
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A sure answer is not a checked one

Why ChatGPT can sound sure and still be wrong, what RAG's three steps do, why you still open the source, and when a changed page needs RAG instead of fine-tuning.

Empty clay chair, teal wave line, and a standing robot under Software Job Posts, Posts in teal.
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Software job posts, five years

US software job posts doubled by 2022, crashed, and are still 22% below early 2020. AI did not replace developers, but the rebound is mostly senior and AI-titled roles.