You've shipped the walkthrough project. From here, the repo's docs/ folder (30 reference documents, kept in sync with the code) answers the "how do I..." questions. This page is the map.
Each doc states what exists in code versus what's a recipe. They're audited against the codebase file by file (28 documents, line-referenced), so when a doc says "returns 410 after sunset", the code does that.
The repo ships 673 lines of CLAUDE.md : the endpoint authoring recipe, five worked endpoints to copy, an 11-row lookup table naming the module that answers each common question, and the boundary marking the fourteen framework apps an agent must not edit. Open the repo in Claude Code and it is loaded already; see Open It in Claude Code for the orientation prompt and how to tell a good answer from a bad one. The fastest builders on this template treat every endpoint as: describe it, check four things, reload.
Now go build the thing you actually bought this for. One class at a time.