/**
 * Validates if an MDX file content can be parsed as a valid AST
 * @param content - The MDX file content to validate
 * @param filePath - The file path for error reporting
 * @returns object with isValid boolean and optional error message
 */
export declare function isValidMdx(content: string, filePath: string): {
    isValid: boolean;
    error?: string;
};