export declare const MODEL_IMAGE_MAX_BYTES: number;
export declare const MODEL_IMAGE_SOURCE_MAX_BYTES: number;
export type PreparedModelImage = {
    buffer: Buffer;
    mimeType: string;
    optimized: boolean;
    originalBytes: number;
};
/**
 * Keep small images byte-for-byte. Oversized images are converted to a bounded
 * WebP derivative for model input; the original media-store object is untouched.
 */
export declare function prepareImageForModel(buffer: Buffer, mimeType: string, maxBytes?: number): Promise<PreparedModelImage>;