import { MilkdownPlugin } from '@milkdown/kit/ctx';
import { Root } from 'mdast';
/**
 * `remark-directive` (used for notice callouts) also parses `:word` in prose as a textDirective.
 * Milkdown only registers handlers for known directives; unknown ones crash ParserState.
 * Convert them back to literal text before the schema parser runs.
 */
export declare function transformUnknownDirectivesInMdast(tree: Root): void;
export declare const remarkUnknownDirectiveFallback: import('@milkdown/utils').$Remark<"unknown-directive-fallback", unknown>;
export declare const unknownDirectiveFallbackPlugin: MilkdownPlugin[];