export interface ImageAttachment {
    readonly id: string;
    readonly mediaType: 'image/png' | 'image/jpeg' | 'image/gif' | 'image/webp';
    readonly bytes: Buffer;
    readonly sizeBytes: number;
}
export declare function formatSize(bytes: number): string;
export declare function renderStatusLine(attachments: ImageAttachment[]): string;
export declare function describeForHistory(text: string, attachments: ImageAttachment[]): string;
export declare function describeAttachmentSummary(attachments: ImageAttachment[]): string;