I'm working toward the AWS Certified Generative AI Developer – Professional certification, and I'm documenting the journey here as I go. These logs cover the labs, the concepts I had to unlearn, and the architecture I'm building toward — chunking, lexical search, embeddings, and the rest of the RAG groundwork. Perhaps it can help others walking this same path in future.
Entry 1 — 14 August 2026
The beginning, misunderstandings and basic setup.
Setting up the lab on Lightsail, de-mystifying chunking, getting to grips with SQLite3 FTS5 for lexical search, and understanding Reciprocal Rank Fusion as the ranking step in hybrid search.