import type { ArgumentsHost, ExceptionFilter } from '@nestjs/common';
/**
 * Global exception filter that normalizes all errors to a consistent format.
 *
 * Response format:
 * ```json
 * {
 *   "error": "Error message",
 *   "code": "ERROR_CODE",
 *   "issues": [{ "field": "fieldName", "message": "..." }],
 *   "requestId": "...",
 *   "timestamp": "..."
 * }
 * ```
 */
export declare class MastraExceptionFilter implements ExceptionFilter {
    private readonly logger;
    catch(exception: unknown, host: ArgumentsHost): Promise<void>;
    /**
     * Normalize any error type to a consistent format.
     */
    private normalizeError;
    /**
     * Get error code from HTTP status.
     */
    private getErrorCode;
}
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