/**
 * CardSession — the lifecycle of a single streaming card.
 *
 * Like a tracking shot through a model railway: each phase
 * transitions with mechanical precision, and every failure
 * has a graceful fallback waiting in the wings.
 *
 *   idle → creating → streaming → completed
 *                               → aborted
 */
import type { LarkClient, StreamingOptions, CompleteOptions } from './types.js';
export declare class CardSession {
    private phase;
    private cardId;
    private messageId;
    private sequence;
    private text;
    private fallback;
    private createPromise;
    private readonly client;
    private readonly chatId;
    private readonly options;
    private readonly flush;
    constructor(client: LarkClient, chatId: string, options?: StreamingOptions);
    update(text: string): Promise<void>;
    complete(options?: CompleteOptions): Promise<boolean>;
    abort(): Promise<void>;
    get isTerminal(): boolean;
    private transition;
    private ensureCardCreated;
    private doCreate;
    private sendCardMessage;
    private performFlush;
}
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