import { type ChatTransport, type LanguageModel, UIMessage, type UIMessageChunk } from 'ai';
export type AssistantMessage = UIMessage & {
    metadata?: {
        /** The text to display instead of the message text. */
        displayText?: string;
        /** Whether to persist the message after chat clearing.
         *  Used for warning messages in cases like using non-genuine MongoDB.
         */
        isPermanent?: boolean;
        /** The source of the message (i.e. the entry point used) */
        source?: 'explain plan' | 'performance insights' | 'connection error';
        /** Information for confirmation messages. */
        confirmation?: {
            description: string;
            state: 'confirmed' | 'rejected' | 'pending';
        };
        /** Overrides the default sent instructions for the assistant for this message. */
        instructions?: string;
        /** Excludes history if this message is the last message being sent */
        sendWithoutHistory?: boolean;
    };
};
/** Returns true if the message should be excluded from being sent to the assistant API. */
export declare function shouldExcludeMessage({ metadata }: AssistantMessage): boolean;
export declare class DocsProviderTransport implements ChatTransport<AssistantMessage> {
    private model;
    private origin;
    private instructions;
    constructor({ instructions, model, origin, }: {
        instructions: string;
        model: LanguageModel;
        origin: string;
    });
    static emptyStream: ReadableStream<UIMessageChunk>;
    sendMessages({ messages, abortSignal, }: {
        messages: AssistantMessage[];
        abortSignal?: AbortSignal;
    }): Promise<ReadableStream<UIMessageChunk>>;
    reconnectToStream(): Promise<ReadableStream<UIMessageChunk> | null>;
}