import type { RenderableTreeNode, Schema } from "@markdoc/markdoc";
import type { SluggerType } from "./types.ts";
export interface Heading {
    /**
     * The heading level (1-6)
     */
    level: number;
    /**
     * The heading text content
     */
    title: string;
    /**
     * The heading id attribute
     */
    id?: string;
}
export interface HeadingsObject {
    headings: Heading[];
    node: RenderableTreeNode;
}
/**
 * Recursively collects all heading nodes from tree
 * after transform (to resolve variables and the like)
 * @param topNode - The top-level renderable tree node of the document
 * @param sluggifier - The function to create an ID if not present
 * @returns Array of heading objects with title, level, and other attributes and nodes without extraneous attributes
 */
export declare function collectHeadings(topNode: RenderableTreeNode, sluggifier: SluggerType): HeadingsObject;
export declare const heading: Schema;