Micro Interaction Spec

This gives you a structured way to document micro-interactions using the trigger-rules-feedback-loops framework, so you're not just saying "make it feel nice" to your team. You specify exactly what initiates an interaction, what logic runs, how users perceive it (visual, audio, haptic), and whether it repeats or evolves. Comes with a spec format covering duration, easing, and accessibility notes. Honestly most useful when you need to hand off interaction details to engineers or maintain consistency across a design system. The 100-500ms timing guidance and reduced-motion reminders are the kind of specifics that actually help.