/**
 * Streaming markdown filter — character-level state machine that strips
 * unsupported markdown syntax on-the-fly.
 */
export declare class StreamingMarkdownFilter {
    private buf;
    private fence;
    private sol;
    private inl;
    feed(delta: string): string;
    flush(): string;
    private pump;
    private pumpFence;
    private pumpSOL;
    private pumpBody;
    private pumpInline;
    private static containsCJK;
}
