Code Inventory
Every class in the game, which system it belongs to, and which file it lives in — scraped from the source on every build, so it cannot drift away from what is actually there. The narrative about each system lives in the roadmap chapters and cites into this; judgement by hand, facts by machine.
Systems
The twelve top-level systems, in the order a reader should meet them: what the player touches, then what supports it.
Classes
Classes are listed completely. Methods are listed selectively — a method earns a citation if it is an entry point, makes a decision, owns a state transition, or carries a doc comment, on the grounds that somebody bothering to explain a method is the best signal available that it matters. Getters, formatters and private plumbing are skipped unless they encode a rule.