export declare const OUTPUT_DIR: string;
export declare function ensureOutputDir(): void;
/** Encode raw RGBA pixel data into a PNG file buffer */
export declare function rgbaToPng(rgba: Buffer, width: number, height: number): Buffer;
export interface ExtractedImage {
    base64: string;
    filePath: string;
    mimeType: string;
}
/**
 * Walk through an API response, find all base64 image data,
 * save them to disk, and return the file paths + raw base64 for MCP image blocks.
 * Also strips base64 data from the result to keep the JSON response small.
 */
export declare function extractAndSaveImages(result: unknown, toolName: string): {
    images: ExtractedImage[];
    result: unknown;
};