Flutter custom design system

Stock Material/Cupertino skills are the wrong default here. If this repo already named colors, type, radius, motion, or a pressable, use those names and values. Do not restyle the app toward FilledButton / NavigationBar / ColorScheme.fromSeed unless the user asked to throw the system away.

Companion skill: flutter-native-ui — only for apps that actually want Material 3 or Cupertino chrome.

References

references/
  tokens.md      ThemeExtension mount, context accessor, 1:1 rule
  pressable.md   Scale/sink press, NoSplash, focus ring, semantics

Detect the system first

Before writing a widget, search the repo for: