fallback

Standard RAG trusts whatever it retrieves, even when it's irrelevant. Corrective RAG grades retrieval quality and acts on it. The signal is the grade-then-correct loop: re-retrieve, fall back to web search, or discard.

As soon as a company uses LLMs in more than one place, it needs a gateway. The signal is the cross-cutting concerns (cost, reliability, observability, governance) that a gateway centralizes, not just 'proxy the API.' Here is the design.