Proof

expo-squircle-view

real upstream package — not intercepted. SquircleView and SquircleButton run from the bundle against the ExpoSquircleView native view (native-seams/expo-squircle-view.tsx, a port of SquirclePath.swift and SquirclePath.kt), which draws the continuous-corner path rebuilt from the laid-out size, borderRadius, cornerSmoothing and preserveSmoothing, inset by half the border width, filled and stroked from the squircle colors.
90%
API coverage
No visual proof cases have been published for this package yet. The registry summary below describes what the compat layer implements.
Working (7)
fillborder and children over the squircle path at any sizeradiussmoothing and preserveSmoothingborder insetSquircleButton pressignoreBorderWidthFromPadding
Missing
enabledIOSAnimation fill and stroke cross-fades apply immediately