Sources

These references informed the handbook. The principles and tradeoffs are Mutative’s decisions, not requirements or endorsements from their authors.

• Mitchell Hashimoto: You have to feel it and My AI adoption journey. Care in use, explicit quality and verification of agent work.
• Benji Taylor: Family Values. A central design influence: simplicity, fluidity and delight across the whole experience.
• Emil Kowalski: You Don’t Need Animations. Purposeful motion and restraint in frequently used interfaces.
• Apple: Human Interface Guidelines. Familiar interactions, feedback and accessibility.
• Apple: Designing Fluid Interfaces. Immediate response, interruption and velocity-aware motion.
• MDN: Using CSS transitions and prefers-reduced-motion. Web implementation details for the live example.
• Cursor’s pstack. Repeatable verification through the product’s real interfaces.

Examples in the book are illustrative. They explain a decision; they are not complete application implementations or reports of production behavior.