import type { Root, Node } from "hast-util-to-text/lib";
import { PluginOptions } from "./types.js";
type AstroVFile = {
    data: {
        astro: {
            frontmatter: Record<string, any>;
        };
    };
};
type AstroRehypePlugin = (tree: Root, file: AstroVFile) => void;
/**
 * Core logic of plainTextPlugin, separated for testing
 * @ignore
 */
export declare function toPlaintextTree(tree: Node, options: Partial<PluginOptions>): string[][] | string;
/**
 * A helper to extract plain text from rendered HTML and add it to Astro frontmatter.
 *
 * @param options plugin options
 * @returns a rehype plugin suitable for Astro
 */
export declare function plainTextPlugin(options?: Partial<PluginOptions>): () => AstroRehypePlugin;
export {};