import React from 'react';
import type { Processor } from 'unified';
export interface MarkdownBlockPieceProps {
    variant: 'sealed' | 'tail';
    blockSource: string;
    processor: Processor;
    components: Record<string, any>;
    streaming: boolean;
}
/**
 * 块级渲染单元：sealed 块缓存不动，tail 块节流重解析。
 */
export declare const MarkdownBlockPiece: React.NamedExoticComponent<MarkdownBlockPieceProps>;
