/**
 * @module mdx
 * This module provides utilities for generating MDX index files in Docusaurus format.
 *
 * @packageDocumentation
 */
/**
 * Hook that materializes a `_category_.yml` file before Docusaurus indexes
 * a directory, ensuring generated bundles have labels, ordering, and
 * optional generated-index metadata even when the folder was produced by the CLI.
 *
 * @param event - Hook payload containing the target directory, category name, and generator options.
 */
export declare const beforeGenerateIndexMetafileHook: (event: {
    data: {
        dirPath: string;
        category: string;
        options?: Record<string, unknown>;
    };
}) => Promise<void>;
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