import type { Sharp } from 'sharp';
/**
 * Attach Sharp's native libvips timeout to an output-capable pipeline.
 *
 * Unlike a Promise race, this stops the underlying native work rather than
 * merely releasing the JavaScript caller while libvips keeps processing.
 */
export declare function applySharpProcessingTimeout(sharpInstance: Sharp): Sharp;
/**
 * Detect the timeout error emitted by Sharp/libvips, including errors wrapped
 * by this package's PreviewGeneratorError details/cause chains.
 */
export declare function isSharpProcessingTimeout(error: unknown): boolean;