import { ReactiveController, ReactiveControllerHost } from 'lit';
/**
 * Reactive controller for caching parsed markdown and throttling renders.
 * Provides HTML caching per message and RAF throttling during streaming.
 */
export declare class MarkdownStreamController implements ReactiveController {
    #private;
    constructor(host: ReactiveControllerHost);
    hostConnected(): void;
    hostDisconnected(): void;
    getCachedHtml(messageId: string, content: string): string;
    scheduleUpdate(): void;
}