import type { AuditSink, AuditEvent } from '@mondaydotcomorg/atp-protocol';
/**
 * OpenTelemetry-based audit sink
 * Provides industry-standard observability with distributed tracing and metrics
 */
export declare class OpenTelemetryAuditSink implements AuditSink {
    name: string;
    private tracer;
    private meter;
    private executionCounter;
    private toolCallCounter;
    private llmCallCounter;
    private approvalCounter;
    private executionDuration;
    private toolDuration;
    write(event: AuditEvent): Promise<void>;
    writeBatch(events: AuditEvent[]): Promise<void>;
    private buildAttributes;
    private handleEvent;
    private recordMetrics;
    private flattenObject;
}
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