theming + material you

modules/astra-system-colors/index.ts

@@ -0,0 +1,28 @@
+import { requireOptionalNativeModule, type NativeModule } from 'expo-modules-core';
+
+/**
+ * Android 12+ monet system palettes (wallpaper-derived). Each ramp is 13 hex
+ * strings ordered by tone [0, 10, 50, 100, 200, ..., 900, 1000] — tone 0 is
+ * white-ish, tone 1000 black-ish.
+ */
+export interface SystemPalette {
+  accent1: string[];
+  accent2: string[];
+  accent3: string[];
+  neutral1: string[];
+  neutral2: string[];
+}
+
+declare class AstraSystemColorsModuleType extends NativeModule {
+  /** True on Android 12+ builds that include the native module. */
+  isAvailable(): boolean;
+  /** Current monet ramps, or null when unavailable. Sync — resource reads are microseconds. */
+  getSystemPalette(): SystemPalette | null;
+}
+
+const native = requireOptionalNativeModule<AstraSystemColorsModuleType>('AstraSystemColors');
+
+export const AstraSystemColors = (native ?? {
+  isAvailable: () => false,
+  getSystemPalette: () => null,
+}) as AstraSystemColorsModuleType;