Nine recipes, one task each. Every one names the files it touches before the first instruction, uses real code from this repository rather than a sketch, and ends with the command that tells you it worked.
They assume you have read the section they extend. A route added below its guard, a table queried with a sql template, or an offer whose catalog amount does not match its Stripe price are all things that compile and all things these pages exist to stop.
Swap fulfillment is the one to read first if you are turning this into a different product. It is the seam between "somebody paid" and "somebody got the thing", and it is the only file in the fulfillment folder that knows what a GitHub repository is.
Rebrand the storefront is the other half of that turn, and the one to read before you start deleting. It names every file that says Fast Forward Dev and separates what you rewrite from what you keep. Theming is the visual half of the same job.