/**
 * Per-App theme storage + build-time stack.
 *
 * Builders call `getActive*()` without an App argument. Wrapping each create/rebuild
 * in `runWith` makes the correct palette available on the stack (single-threaded JS),
 * while `WeakMap` keeps an App-scoped snapshot for lookups after build.
 */
export interface ThemeScope<T> {
    /** Push theme for the duration of a synchronous factory/rebuild. */
    runWithResult: <R>(theme: T, fn: () => R) => R;
    /** Active palette: stack top → App WeakMap → last sync → fallback. */
    getActive: (app?: object | null) => T;
    /** Store App-scoped snapshot and update last-sync fallback. */
    sync: (theme: T, app?: object | null) => T;
}
export declare function createThemeScope<T>(fallback: () => T): ThemeScope<T>;