import { type BaseEvent, type CustomEvent } from '../ag-ui-core/index.js';
export declare const CONVERSATION_CUSTOM_EVENT_NAMES: Readonly<{
    a2uiCard: "runtime.a2ui.card";
    followUpQuestions: "runtime.follow-up-questions";
    image: "runtime.image";
    pageState: "runtime.page.state";
}>;
export type ConversationPageState = 'empty' | 'network-error' | 'ready' | 'service-offline' | 'service-paused' | 'system-error';
export type ConversationA2UICardEventValue = {
    itemId?: string;
    metadata?: Record<string, unknown>;
    payload: unknown;
};
export type ConversationImageEventValue = {
    itemId?: string;
    src: string;
    alt?: string;
    mimeType?: string;
    metadata?: Record<string, unknown>;
};
export type ConversationPageStateEventValue = {
    state: ConversationPageState;
};
export type ConversationFollowUpQuestion = {
    id?: string;
    label: string;
    prompt: string;
};
export type ConversationFollowUpQuestionsEventValue = {
    questions: ConversationFollowUpQuestion[];
};
export type ConversationCustomEventValueMap = {
    [CONVERSATION_CUSTOM_EVENT_NAMES.a2uiCard]: ConversationA2UICardEventValue;
    [CONVERSATION_CUSTOM_EVENT_NAMES.followUpQuestions]: ConversationFollowUpQuestionsEventValue;
    [CONVERSATION_CUSTOM_EVENT_NAMES.image]: ConversationImageEventValue;
    [CONVERSATION_CUSTOM_EVENT_NAMES.pageState]: ConversationPageStateEventValue;
};
export type ConversationCustomEventName = keyof ConversationCustomEventValueMap;
export type ConversationCustomEvent<TName extends ConversationCustomEventName = ConversationCustomEventName> = CustomEvent & {
    name: TName;
    value: ConversationCustomEventValueMap[TName];
};
export declare function createConversationCustomEvent<TName extends ConversationCustomEventName>(name: TName, value: ConversationCustomEventValueMap[TName], fields?: Pick<BaseEvent, 'rawEvent' | 'timestamp'>): ConversationCustomEvent<TName>;
export declare function isConversationCustomEvent(event: BaseEvent): event is ConversationCustomEvent;