import type { ExtensionAuto } from "../../../../core/index.js";
import type { NodeSpec } from "../../../../pm/model.js";
export * from "./const.js";
export { headingToMarkdown } from "./utils.js";
export type HeadingSpecsOptions = {
    /**
     * @deprecated use placeholder option in BehaviorPreset instead.
     */
    headingPlaceholder?: NonNullable<NodeSpec['placeholder']>['content'];
};
export declare const HeadingSpecs: ExtensionAuto<HeadingSpecsOptions>;