Compare agent skills before installing.

Author economical visual tests — full visual coverage in the fewest billable snapshots. Applies to any per-snapshot visual tool (UI Verify, Chromatic, Percy, Playwright screenshots), which all bill and diff per rendered story/test. Use when a component's variants/states are exploding into one snapshot per combination, when the visual-testing bill or noise is driven by snapshot count, or when writing new stories/captures and you want the cheapest layout that still covers every variant. Covers gallery/matrix stories, data-driven states, and the coarse-granularity tradeoff.

Apple's approach to interface design and fluid, physical motion, translated for the web. Use when building or reviewing gesture-driven UI, spring animations, drag/swipe/sheet interactions, momentum and interruptible transitions, translucent materials and depth, typography (optical sizing, tracking, leading), reduced-motion, or the design foundations (feedback, spatial consistency, restraint) behind Apple-style interfaces.