export interface IconResult {
    /** Which of the two the app got — named in the build output. */
    source: 'cover' | 'placeholder';
}
/** Write `size`x`size` flat-colour RGB PNG — the no-cover placeholder. */
export declare function writeFlatPng(target: string, size: number, rgb: readonly [number, number, number]): void;
/**
 * Produce `icon-1024.png` inside the generated asset catalog. `coverPath` is tried first; any
 * sips failure (missing file, unreadable format) falls through to the placeholder rather than
 * failing a build over artwork.
 */
export declare function writeAppIcon(assetCatalogDir: string, coverPath: string): IconResult;