how

Use for "how does X work", code walkthroughs before changing something, placement / ownership / layering questions ("where should this live", "which package owns this", "is this the right layer"), and teaching requests ("teach me this", "help me really understand X", "explain this change or subsystem to me"). Explains subsystem architecture, runtime flow, and onboarding mental models; in teaching mode it turns that into one plain account a person actually understands.