/**
 * SQLiteProvider — 默认存储后端
 * 使用 better-sqlite3，FTS5 全文索引，事务保证原子性。
 */
import type { KnowledgeEntry, EntryStatus, KnowledgeType } from '../types/index.js';
import type { StorageProvider, SemanticQuery, SearchResult, SaveOptions } from './storage-provider.js';
export interface SQLiteProviderOptions {
    dbPath: string;
    configDir?: string;
}
export declare class SQLiteProvider implements StorageProvider {
    private db;
    private readonly qualityGate;
    constructor(options: SQLiteProviderOptions);
    private initSchema;
    /**
     * Semantic dedup: BGE vector similarity.
     * Computes embedding for new entry, searches existing entries by cosine similarity.
     * Returns the id of the duplicate entry if similarity > 0.9.
     */
    private checkSemanticDuplicate;
    save(entry: KnowledgeEntry, options?: SaveOptions): Promise<boolean>;
    findById(id: string): Promise<KnowledgeEntry | null>;
    /**
     * Vector cosine similarity search using Ollama bge-m3 embeddings.
     * Returns null if embedding generation fails or no embeddings exist (graceful fallback).
     */
    private vectorSearch;
    search(query: SemanticQuery): Promise<SearchResult[]>;
    updateStatus(id: string, status: EntryStatus): Promise<void>;
    getVersionHistory(id: string): Promise<KnowledgeEntry[]>;
    findByType(type: KnowledgeType): Promise<KnowledgeEntry[]>;
    fullTextSearch(query: string, limit?: number): Promise<KnowledgeEntry[]>;
    findAll(): Promise<KnowledgeEntry[]>;
    delete(id: string): Promise<void>;
    count(): Promise<number>;
    close(): Promise<void>;
    private rowToEntry;
}
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