import { LogFormatter, LogEntry, StructuredFormatterOptions } from '../types';
/**
 * Structured formatter for machine-readable logs with additional structure
 */
export declare class StructuredFormatter implements LogFormatter {
    private prefix;
    private includeTimestamp;
    private includeHostname;
    constructor(options?: StructuredFormatterOptions);
    format(entry: LogEntry): string;
    private flattenMetadata;
}
//# sourceMappingURL=structured.d.ts.map