import type { AgentMessageFinishOptions, AgentMessageStream, AgentStreamEvent } from "./index.js";
export interface BufferedMessageStreamOptions {
    /**
     * Build the error thrown when writing after `finish()`. Defaults to a plain
     * Error; adapters pass their own typed error to preserve message/code.
     */
    readonly onClosed?: () => Error;
}
/**
 * Minimal in-memory {@link AgentMessageStream} that just accumulates text.
 * Replaces the identical no-op stream copied into the request/response adapters
 * (openai-api, webhook, cron) that collect a final string rather than streaming.
 */
export declare class BufferedMessageStream implements AgentMessageStream {
    private currentText;
    private done;
    private readonly onClosed;
    constructor(options?: BufferedMessageStreamOptions);
    /** Trimmed accumulated text. */
    get text(): string;
    status(_text: string): Promise<void>;
    event(_event: AgentStreamEvent): Promise<void>;
    append(delta: string): Promise<void>;
    replace(text: string): Promise<void>;
    finish(finalText?: string, options?: AgentMessageFinishOptions): Promise<void>;
    private assertOpen;
}
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