import type { Node as PMNode } from 'prosemirror-model';
import type { Diff } from './types';
/**
 * Diffs two ProseMirror documents, tree-first: block-level children are
 * aligned and matched, then diffed recursively (containers recurse into
 * children, inline-content nodes get a word-level diff of their flattened
 * content, leaf/atom nodes are compared by attrs). Both docs must come from
 * the same Schema instance.
 */
export declare function diffDoc(oldDoc: PMNode, newDoc: PMNode): Diff[];