import type { ConversationStorage, ConversationEntity, ConversationItemEntity, ConversationMetadata, ConversationItemInput, ConversationQueryOptions } from "./types";
export declare class InMemoryStorage implements ConversationStorage {
    private conversations;
    private items;
    constructor(options?: {
        maxSize?: number;
    });
    private estimateSize;
    private mapItem;
    createConversation(params: {
        metadata?: ConversationMetadata;
        items?: ConversationItemInput[];
    }): Promise<ConversationEntity>;
    getConversation(id: string): Promise<ConversationEntity | undefined>;
    listConversations(params: ConversationQueryOptions): Promise<ConversationEntity[]>;
    updateConversation(id: string, metadata: ConversationMetadata): Promise<ConversationEntity | undefined>;
    deleteConversation(id: string): Promise<{
        id: string;
        deleted: boolean;
    }>;
    addItems(conversationId: string, items: ConversationItemInput[]): Promise<ConversationItemEntity[] | undefined>;
    getItem(conversationId: string, itemId: string): Promise<ConversationItemEntity | undefined>;
    deleteItem(conversationId: string, itemId: string): Promise<ConversationEntity | undefined>;
    listItems(conversationId: string, params: ConversationQueryOptions): Promise<ConversationItemEntity[] | undefined>;
}