1Embeddings & Vector SearchEmbeddings turn meaning into numbers, and vector search uses those numbers to find things that are similar rather than merely matching words.Retrieval 2RAG, ExplainedRetrieval-augmented generation lets a language model answer with help from external information instead of memory alone.Retrieval 3Chunking & IndexingHow raw documents become retrievable knowledge by being split into useful pieces and organized for fast, relevant search.Retrieval 4Context EngineeringContext engineering is the practice of giving an AI system the right information, in the right form, at the right moment.Retrieval 5Agent MemoryAgent memory is the design of what an AI system records, retrieves, forgets, and is allowed to use when acting over time.Retrieval