Swift Charts (SwiftUI)

Declarative charts for iOS/macOS. A Chart contains marks (each row of data → one mark); modifiers on the marks encode data into position/color/symbol; modifiers on the Chart control axes, scales, scrolling, and selection. Grounded in Apple's Charts framework.

• import Charts (plus SwiftUI). Base API iOS 16; selection & scrolling iOS 17; vectorized/function plots iOS 18; Chart3D/SurfacePlot iOS 26.
• Sibling skills: axis/value formatting → swift-formatstyle; Money/Decimal sources → kmp-money; observable view state → swiftui-observation; accessibility (audio graphs, labels) → accessibility-patterns; Android/Compose charts → jetpack-compose.

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