export declare function initDb(dbDir: string): void;
export declare function saveMemory(chatId: string, content: string): number;
export declare function getMemories(chatId: string): {
    id: number;
    content: string;
    created_at: string;
}[];
export declare function deleteMemory(chatId: string, id: number): boolean;
export declare function formatMemoriesForPrompt(chatId: string): string;
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