This is the final quality pass you run before shipping anything user-facing. It systematically checks visual alignment, spacing consistency, interaction states, typography hierarchy, and micro-details that separate good work from great work. Runs through a comprehensive checklist covering everything from WCAG contrast ratios to 44px touch targets to smooth 60fps transitions. Most valuable when you've got something functionally complete but it feels rough around the edges. It's methodical about polish rather than random tweaking, focusing on systematic issues like inconsistent spacing tokens or missing hover states across components.
npx skills add https://github.com/pbakaus/impeccable --skill polish