/**
 * Observability integration for resilience patterns
 */
import type { Logger } from '@orchestr8/logger';
import type { CircuitBreakerObserver } from './circuit-breaker.js';
import type { ResilienceContext } from './types.js';
/**
 * Resilience event types for structured logging
 */
export type ResilienceEventType = 'retry_attempt' | 'retry_success' | 'retry_exhausted' | 'retry_backoff' | 'timeout_triggered' | 'timeout_cleared' | 'circuit_state_change' | 'circuit_probe_attempt' | 'circuit_recovery' | 'composition_start' | 'composition_complete' | 'composition_error';
/**
 * Resilience telemetry interface for observability
 */
export interface ResilienceTelemetry {
    /** Log a resilience event */
    logEvent(type: ResilienceEventType, context: ResilienceContext, metadata?: Record<string, unknown>): void;
    /** Create a circuit breaker observer */
    createCircuitBreakerObserver(): CircuitBreakerObserver;
    /** Start a timed operation */
    startTimer(operation: string): () => number;
    /** Get the underlying logger */
    getLogger(): Logger;
}
/**
 * Default implementation using @orchestr8/logger
 */
export declare class DefaultResilienceTelemetry implements ResilienceTelemetry {
    private readonly logger;
    constructor(logger?: Logger);
    logEvent(type: ResilienceEventType, context: ResilienceContext, metadata?: Record<string, unknown>): void;
    createCircuitBreakerObserver(): CircuitBreakerObserver;
    startTimer(operation: string): () => number;
    getLogger(): Logger;
    private getLogLevel;
    private getEventMessage;
}
/**
 * Singleton instance for convenience
 */
export declare const defaultTelemetry: DefaultResilienceTelemetry;
/**
 * Factory function to create telemetry with custom logger
 */
export declare function createResilienceTelemetry(logger?: Logger): ResilienceTelemetry;
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