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Last updated: May 9, 2026, 2:30 PM ET

LLM Engineering & Production Systems

Recent production analysis reveals that standard Retrieval-Augmented Generation (RAG systems quietly fail when dealing with temporal data, prompting one developer to implement a dedicated temporal layer to manage knowledge decay in their AI tutor. This practical challenge underscores the need for engineers to master core concepts beyond basic prompting, as effective deployment requires deep understanding of everything from tokenisation methodologies to complex evaluation metrics for large language models in practice.