In ten lines
The ten rules of the vault.
They explain where things go and how they move. You do not learn them by heart: every guide page in the vault names the rule it follows, so you meet each one where it applies.
Use Rule · Finish Line Test · Authorship Test · Warehouse and Workshop · When in Doubt, Inbox · Three Modes, Three Services · One Door In · Born in Place · Status Is Location · Weekly Heartbeat.
They are habits the vault helps with, not laws. Above them sits one golden rule: simplify what does not help.