/** The Ctrl+V hint, phrased for the host platform. */
export declare function clipboardImageHint(hostPlatform?: NodeJS.Platform): string;
/**
 * Decide whether a clipboard type listing describes an image. Pure so the
 * per-platform listing parsers can be unit-tested without a real clipboard.
 */
export declare function clipboardListingHasImage(listing: string): boolean;
/** Probe the OS clipboard; resolves true when it currently holds an image. */
export declare function clipboardHasImage(): Promise<boolean>;
/**
 * Extract the clipboard image to a temp PNG file and return its path, or null
 * when the clipboard holds no image / the platform tool is unavailable.
 */
export declare function readClipboardImage(): Promise<string | null>;
