Expense Discipline helps agents and users navigate the friction of expense reports through policy fluency, capture habits, and structured submission routines. It extracts five load-bearing rules into a concise policy crib, enforces a fifteen-second at-spend capture habit with necessary context notes, and establishes monthly submission rhythms. Additionally, it provides an approver rubric to ensure fair, fast reviews without nickel-auditing. Use it when setting up an expense workflow, figuring out what a policy actually requires, or reviewing expenses as a manager.