Master skill for SectionUI (SectionKit), a powerful data-driven framework for building complex UICollectionView layouts in Swift. Use when working with UICollectionView, building list interfaces, implementing reactive data binding with Combine, optimizing collection view performance, managing selection state, implementing sticky headers/footers, creating waterfall layouts, integrating SwiftUI views, handling scroll events, implementing page-based navigation, or applying production-tested SectionUI patterns. Covers cells, sections, managers, layout plugins, decorations, performance optimization, reactive programming, selection management, scroll observation, page view controllers, and reusable list architecture patterns.
2026-05-05