/**
 * Multi-LLM Provider Helper Functions and Classes
 * @module @skillsmith/core/testing/MultiLLMProvider.helpers
 */
import type { CircuitBreakerConfig, ProviderConfig, FailoverCondition, LLMResponse } from './MultiLLMProvider.types.js';
/** Circuit breaker state type */
export type CircuitState = 'closed' | 'open' | 'half-open';
/** Circuit breaker metrics */
export interface CircuitBreakerMetrics {
    failures: number;
    successes: number;
    errorRate: number;
}
/**
 * Simple circuit breaker for provider failover
 */
export declare class CircuitBreaker {
    private config;
    private state;
    private failures;
    private successes;
    private lastFailureTime;
    private totalRequests;
    constructor(config: CircuitBreakerConfig);
    getState(): CircuitState;
    recordSuccess(): void;
    recordFailure(): void;
    canExecute(): boolean;
    reset(): void;
    getMetrics(): CircuitBreakerMetrics;
}
/**
 * Determine error condition from error object
 */
export declare function getErrorCondition(error: unknown): FailoverCondition;
/**
 * Estimate token count from text
 * Rough estimate: ~4 characters per token
 */
export declare function estimateTokens(text: string): number;
/**
 * Calculate cost from token counts
 */
export declare function calculateCost(config: ProviderConfig, inputTokens: number, outputTokens: number): number;
/**
 * Calculate compatibility score from response
 * Simple scoring based on latency and success
 */
export declare function calculateCompatibilityScore(response: LLMResponse): number;
/**
 * Simulate network request (for testing)
 */
export declare function simulateRequest(_config: ProviderConfig): Promise<void>;
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