/**
 * Error Catalog — Structured error codes with helpful messages.
 *
 * @example
 * ```
 * AP001: Adapter connection failed
 *   → Check your API key in .env or OPENAI_API_KEY
 * AP002: Trace format invalid
 *   → Ensure trace has 'steps' array with 'type' and 'content'
 * AP003: Budget exceeded
 *   → Current spend: $5.23, limit: $5.00
 * ```
 */
export interface ErrorInfo {
    code: string;
    title: string;
    hint: string;
    category: ErrorCategory;
}
export type ErrorCategory = 'adapter' | 'trace' | 'budget' | 'config' | 'test' | 'io' | 'internal';
export declare class AgentProbeError extends Error {
    readonly code: string;
    readonly hint: string;
    readonly category: ErrorCategory;
    readonly context?: Record<string, any>;
    constructor(code: string, context?: Record<string, any>);
    /**
     * Format for CLI display.
     */
    format(): string;
}
/**
 * Get error info by code.
 */
export declare function getError(code: string): ErrorInfo | undefined;
/**
 * Get all error codes.
 */
export declare function getAllErrors(): ErrorInfo[];
/**
 * Get errors by category.
 */
export declare function getErrorsByCategory(category: ErrorCategory): ErrorInfo[];
/**
 * Format an error catalog entry for display.
 */
export declare function formatError(info: ErrorInfo): string;
/**
 * Format all errors for CLI help display.
 */
export declare function formatErrorCatalog(): string;
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