Interaction Design Design interactions that help real people accomplish real goals with minimum friction and maximum meaning. The Fundamental Question Before any pattern or timing value, ask: What is the user trying to accomplish, and how does this interaction help or hinder that goal? Interaction design is not about mechanisms. It is about helping specific people achieve specific purposes while respecting their time, attention, and humanity. Output Contracts Interaction Specification Flow Analysis Core Principles 1. Goal-Directed Design Users are not "operators" triggering state changes. The…