/**
 * Lightweight trace logger that records raw transport IO when KOS_TRACE is set.
 */
export declare class TransportTraceLogger {
    private readonly context;
    private readonly enabled;
    private stream;
    constructor(context: string);
    logSend(data: string | Buffer): void;
    logReceive(data: string | Buffer): void;
    logInfo(message: string): void;
    logError(error: unknown): void;
    close(): void;
    private write;
    private formatStringPayload;
    private formatBufferPayload;
}
//# sourceMappingURL=trace-logger.d.ts.map