import { MilkdownPlugin } from '@milkdown/kit/ctx';
import { Root } from 'mdast';
export declare const ATTACHMENT_NODE_NAME = "attachment";
/**
 * Platform markdown-it converts `[title size](/api/attachments.redirect?...)` paragraphs
 * into attachment block nodes. Mirror that in remark for collab template loads.
 */
export declare function transformAttachmentLinksInMdast(tree: Root): void;
export declare const remarkAttachmentPlugin: import('@milkdown/utils').$Remark<"platform-attachment-transform", unknown>;
/** Platform `attachment` block atom — attrs must match shared/editor/nodes/Attachment.tsx for Y.js sync. */
export declare const attachmentNode: import('@milkdown/utils').$Node;
export declare const attachmentPlugins: MilkdownPlugin[];