/**
 * Copyright 2025 Chris Bunting <cbuntingde@gmail.com>
 *
 * Custom Error Types - Enterprise-grade error handling
 */
/**
 * Base error class for all application errors
 */
export declare class AppError extends Error {
    readonly code: string;
    readonly statusCode: number;
    readonly isOperational: boolean;
    readonly context?: Record<string, unknown>;
    constructor(message: string, code: string, statusCode?: number, isOperational?: boolean, context?: Record<string, unknown>);
}
/**
 * Validation error
 */
export declare class ValidationError extends AppError {
    constructor(message: string, context?: Record<string, unknown>);
}
/**
 * GitHub API error
 */
export declare class GitHubAPIError extends AppError {
    constructor(message: string, context?: Record<string, unknown>);
}
/**
 * Rate limit error
 */
export declare class RateLimitError extends AppError {
    readonly retryAfter?: number;
    constructor(message: string, retryAfter?: number, context?: Record<string, unknown>);
}
/**
 * Timeout error
 */
export declare class TimeoutError extends AppError {
    constructor(message: string, context?: Record<string, unknown>);
}
/**
 * Repository access error
 */
export declare class RepositoryAccessError extends AppError {
    constructor(message: string, context?: Record<string, unknown>);
}
/**
 * Circuit breaker error
 */
export declare class CircuitBreakerError extends AppError {
    constructor(message: string, context?: Record<string, unknown>);
}
/**
 * Check if error is operational (expected) or programming error
 */
export declare function isOperationalError(error: Error): boolean;
/**
 * Format error for client response (sanitized, no sensitive data)
 */
export declare function formatErrorForClient(error: unknown): {
    error: string;
    code: string;
    message: string;
    context?: Record<string, unknown>;
};
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