/**
 * nbt messages / sessions 共用的话题范围解析。
 *
 * 话题群的默认查询范围是“当前话题”，显式 `--all-threads` 才看整个群。
 * 切到另一个 chat 时不能继承当前话题，避免把别的聊天过滤成空。
 */
import type Database from "better-sqlite3";
export interface ResolvedHistoryThreadScope {
    threadId?: string;
    allThreads: boolean;
}
export declare function chatIsIsolatedTopic(db: Database.Database, chatId: string | undefined): boolean;
export declare function resolveHistoryThreadScope(flags: Record<string, string>, currentChatId: string | undefined, targetChatId: string | undefined, currentThreadId?: string, isolatedTopicChat?: boolean): ResolvedHistoryThreadScope;
export declare function historyThreadLabel(threadId: string | null | undefined): string;