What you are learning
Contextbay is packing retrieved evidence so models answer from sources, not guesses. The teaching focus is Context and RAG (context windows, citations, RAG packs, grounding).
Work in order. Early parts set vocabulary and environment; later parts assume the earlier checkpoints.
How to use these lessons
Read the goal, open the matching GitHub folder, complete the lab or exercises, then return for the explanation. If a command fails, check you are in the numbered folder first.
Parts in order
Each chapter below is one checkpoint in this track.