Practical engineering notes on building production-grade AI systems. Three series plus a decision-oriented Patterns layer across AI Agents, RAG, and MCP. Patterns over products, written for engineers.https://aiinpracticehub.com/https://aiinpracticehub.com/articles/one-retrieval-method-is-not-a-diagnosis/https://aiinpracticehub.com/articles/one-retrieval-method-is-not-a-diagnosis/We re-tested the question every chunking strategy failed, this time with BM25 and rank fusion, and with every prediction committed before the run. One of our own diagnoses did not survive.Mon, 17 Aug 2026 00:00:00 GMThttps://aiinpracticehub.com/articles/why-fixed-size-chunking-breaks-retrieval/https://aiinpracticehub.com/articles/why-fixed-size-chunking-breaks-retrieval/A five-question retrieval experiment shows where fixed-size chunking breaks, why overlap doesn’t always help, and when the real problem is retrieval rather than chunking.Sun, 09 Aug 2026 00:00:00 GMT