import type { ThreadEntity, MessageEntity, ChatStoreProvider } from '../types.js';
import type { Message } from '@cicctencent/agent-core';
/**
 * 默认 ChatStoreProvider 实现 — JSON 文件存储
 */
export declare class DefaultChatStoreProvider implements ChatStoreProvider {
    private threadStore;
    private msgIdCounters;
    private dataDir;
    constructor(dataDir?: string);
    getThreads(workspaceId?: number): ThreadEntity[];
    getThread(id: number): ThreadEntity | undefined;
    createThread(data: {
        title?: string;
        workspaceId?: number;
        source?: 'local' | 'a2a';
    }): ThreadEntity;
    updateThread(id: number, data: Partial<ThreadEntity>): ThreadEntity | undefined;
    deleteThread(id: number): boolean;
    getMessages(threadId: number, options?: {
        limit?: number;
        offset?: number;
    }): {
        items: MessageEntity[];
        total: number;
        hasMore: boolean;
    };
    addMessage(data: {
        threadId: number;
        role: string;
        content: string;
        type?: string;
        meta?: any;
    }): MessageEntity;
    updateMessage(threadId: number, id: number, data: {
        content?: string;
        meta?: any;
    }): MessageEntity | undefined;
    /**
     * 持久化前对消息做防御性清理（深拷贝，不修改入参）：
     * 1. content 中剥离泄漏的 DSML 标记，并截断超长文本
     * 2. meta.toolCalls[].output 截断超长内容
     * 3. meta.toolCalls[].input 超长时截断
     */
    private sanitizeForPersistence;
    deleteMessage(threadId: number, id: number): boolean;
    clearThreadMessages(threadId: number): void;
    buildThreadHistory(threadId: number, limit?: number): Message[];
    searchMessages(query: string, workspaceId?: number): Array<{
        threadId: number;
        threadTitle: string;
        messageId: number;
        role: string;
        content: string;
        createdAt: string;
        snippet: string;
    }>;
    exportThread(threadId: number, format: 'markdown' | 'json' | 'text'): string;
    private getThreadMessagesDir;
    private getMessageStore;
    private nextThId;
    private nextMsgId;
    private shouldSkipMessage;
    private ensureMetaArtifacts;
    private reconstructArtifacts;
    private exportAsMarkdown;
    private exportAsText;
}
export declare function getChatStoreProvider(dataDir?: string): DefaultChatStoreProvider;
export declare function getThreads(workspaceId?: number): ThreadEntity[];
export declare function getThread(id: number): ThreadEntity | undefined;
export declare function createThread(data: {
    title?: string;
    workspaceId?: number;
    source?: 'local' | 'a2a';
}): ThreadEntity;
export declare function getMessages(threadId: number, options?: {
    limit?: number;
    offset?: number;
}): {
    items: MessageEntity[];
    total: number;
    hasMore: boolean;
};
export declare function addMessage(data: {
    threadId: number;
    role: string;
    content: string;
    type?: string;
    meta?: any;
}): MessageEntity;
export declare function updateMessage(threadId: number, id: number, data: {
    content?: string;
    meta?: any;
}): MessageEntity | undefined;
export declare function buildThreadHistory(threadId: number, limit?: number): Message[];
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