Always retrieving is wasteful and sometimes harmful; never retrieving hallucinates. Self-RAG makes retrieval a decision the model controls, then critiques what it got back. The signal is the retrieve-on-demand plus self-critique loop.
Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.
Always retrieving is wasteful and sometimes harmful; never retrieving hallucinates. Self-RAG makes retrieval a decision the model controls, then critiques what it got back. The signal is the retrieve-on-demand plus self-critique loop.
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