Part 5

Part 5 moves from the fundamental structures introduced in Part 4 to complete transformations of in-memory data. You will traverse tables, construct named records and lookups, group observations, and trace how several operations carry a record from input to result.

This is also where coding-agent collaboration begins. Start with Working with AI from Part 5 onward, which introduces the exercise modes and shows how to use changed code and its behaviour to understand what an agent did.

Part 6 will extend the same transformations across file boundaries, and Part 7 will show how library calls take responsibility for larger stages while your code connects them.