Rubric
AI Engineering
RAG · Document search · LLM engineering
RAG system: what it is, when you need it and where it breaks
RAG is a way to make a language model answer from your documents rather than from its memory of the internet. The idea is simple and the failure is predictable: almost every problem in these systems arises not in the model but in how the documents are chunked, retrieved and passed to it.
LLM · Quality · Evaluation
LLM hallucinations: the mechanism and the engineering measures against them
A hallucination is not a model failure but the model’s normal mode of operation, carried through to a result that is inconvenient for us. Understanding the mechanism matters more than any list of “prompts against hallucinations”: it shows which measures work and which only create a feeling of control.