import type { ImageFormat } from "./index.js";
export interface PipelineOptions {
    /** Absolute path to the public directory (source images live here). */
    publicDir: string;
    /** Absolute path to the output directory (variants are written here). */
    outDir: string;
    /** Formats to generate. Defaults to ["webp", "avif"]. */
    formats?: ImageFormat[];
    /** Quality (1-100). Defaults to 80. */
    quality?: number;
}
export interface ProcessedImage {
    /** Original source path (e.g. "/images/hero.jpg"). */
    src: string;
    /** Generated variant paths relative to outDir. */
    variants: {
        path: string;
        width: number;
        format: ImageFormat;
    }[];
}
/**
 * Processes a batch of images: for each image, generates variants at the
 * specified widths and formats using sharp. Returns the list of generated
 * files.
 *
 * If sharp is not installed, returns an empty array and logs a warning once.
 */
export declare function processImages(images: {
    src: string;
    widths: number[];
    formats: ImageFormat[];
}[], options: PipelineOptions): Promise<ProcessedImage[]>;
/**
 * Checks whether sharp is available without actually loading it.
 */
export declare function isSharpAvailable(): Promise<boolean>;