Simas Razinskas

RAG fit check

Retrieval-augmented generation solves a specific problem. Three checks that tell you whether you have that problem — before you build the pipeline.

RAG earns its complexity when answers must be grounded in knowledge that keeps changing. It fails quietly when the corpus is weak, permissions are unclear, or nobody measures whether retrieval finds the right passages at all.

The corpus decides more than the model

Stale documents, contradicting versions, unclear ownership and permission boundaries will sink a RAG system before the embedding model gets a chance to matter. Audit the knowledge first; pick the model later.

Measure retrieval before generation

If the right passages aren't found reliably, better generation only makes wrong answers sound more confident. Retrieval quality is measurable — build that evaluation before tuning anything downstream.

Design what happens when the system doesn't know

Missing evidence, stale content, a question outside the corpus — each needs a designed behavior: decline, cite with a warning, or route to a human. The unplanned alternative is improvisation delivered in a confident tone.

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