/**
 * ProtocolBench — In-memory metrics collector.
 */
import type { MetricsCollector, CollectedMetrics } from './types.js';
export declare class InMemoryMetricsCollector implements MetricsCollector {
    private messages;
    private tasks;
    private faults;
    private recoveries;
    recordMessage(type: string, sizeBytes: number, latencyMs: number): void;
    recordTaskCompletion(success: boolean, qualityScore?: number): void;
    recordFault(type: string): void;
    recordRecovery(type: string, recoveryMs: number): void;
    snapshot(): CollectedMetrics;
    reset(): void;
}
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