# 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](https://mitchellh.com/writing/feel-it)
  and [My AI adoption journey](https://mitchellh.com/writing/my-ai-adoption-journey).
  Care in use, explicit quality and verification of agent work.
- Benji Taylor: [Family Values](https://benji.org/family-values).
  A central design influence: simplicity, fluidity and delight across the whole experience.
- Emil Kowalski: [You Don’t Need Animations](https://emilkowal.ski/ui/you-dont-need-animations).
  Purposeful motion and restraint in frequently used interfaces.
- Apple: [Human Interface Guidelines](https://developer.apple.com/design/human-interface-guidelines/).
  Familiar interactions, feedback and accessibility.
- Apple: [Designing Fluid Interfaces](https://developer.apple.com/videos/play/wwdc2018/803/).
  Immediate response, interruption and velocity-aware motion.
- MDN: [Using CSS transitions](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Transitions/Using)
  and [prefers-reduced-motion](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules/@media/prefers-reduced-motion).
  Web implementation details for the live example.
- Cursor’s [pstack](https://github.com/cursor/plugins/tree/main/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.