import { type Content, type Editor } from '@tiptap/core';
import type { Transaction } from '@tiptap/pm/state';
export type ExternalDocumentContentResult = 'applied' | 'unchanged' | 'unsupported';
/**
 * Returns whether an editor transaction represents a user-authored document
 * change that the controlled host must persist.
 */
export declare function shouldPublishDocumentUpdate(transaction: Transaction, appendedTransactions?: readonly Transaction[]): boolean;
/**
 * Applies controlled host content as the smallest ProseMirror transaction.
 * This keeps selections, editor instances, and local history stable while an
 * agent or another realtime producer extends the document.
 */
export declare function applyExternalDocumentContent(editor: Editor, content: Content): ExternalDocumentContentResult;