/**
 * Collaborative editing utilities for Sunsama task notes
 *
 * These functions create and update Yjs-based collaborative snapshots
 * compatible with Sunsama's real-time editing system.
 *
 * IMPORTANT: Task notes use XmlFragment → XmlElement('paragraph') → XmlText,
 * NOT Y.Text directly — using Y.Text breaks Sunsama UI sync.
 */
import type { CollabSnapshot } from '../types/api.js';
/**
 * Creates a collaborative editing snapshot for task notes using Yjs
 *
 * Always creates a collabSnapshot even for empty notes to match UI behavior
 * and enable future note updates.
 *
 * @param taskId - The task ID (used to construct the Yjs document name)
 * @param notes - The notes content in Markdown format (can be empty)
 * @returns CollabSnapshot object with Yjs-generated state
 */
export declare function createCollabSnapshot(taskId: string, notes: string): CollabSnapshot;
/**
 * Creates an updated collaborative editing snapshot based on existing state
 *
 * Takes an existing collaborative snapshot and creates a new one with updated
 * content, properly handling the Yjs document state and incrementing version clocks.
 *
 * @param existingSnapshot - The existing collaborative snapshot from the task
 * @param newContent - The new content to apply (Markdown format)
 * @returns Updated CollabSnapshot object
 */
export declare function createUpdatedCollabSnapshot(existingSnapshot: CollabSnapshot, newContent: string): CollabSnapshot;
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