/**
 * Bridge error with retry semantics.
 */
export declare class BridgeError extends Error {
    readonly statusCode: number;
    readonly provider: string;
    constructor(message: string, statusCode: number, provider: string);
    /** Server errors (5xx) and rate limits (429) are retryable */
    isRetryable(): boolean;
}
export interface RetryConfig {
    maxRetries: number;
    baseDelayMs: number;
    maxDelayMs: number;
}
export declare const DEFAULT_RETRY_CONFIG: RetryConfig;
/**
 * Exponential backoff with jitter.
 */
export declare function backoffDelay(attempt: number, config: RetryConfig): number;
/**
 * Circuit breaker state tracker.
 * Opens after `threshold` consecutive failures, auto-resets after `resetMs`.
 */
export declare class CircuitBreaker {
    private consecutiveFailures;
    private lastFailureTime;
    private readonly threshold;
    private readonly resetMs;
    constructor(threshold?: number, resetMs?: number);
    isOpen(): boolean;
    recordSuccess(): void;
    recordFailure(): void;
    reset(): void;
    get failures(): number;
}
/**
 * Factory for creating BridgeError from an HTTP response.
 */
export declare function createBridgeError(provider: string, status: number, body: string): BridgeError;
//# sourceMappingURL=errors.d.ts.map