import type { Database } from 'better-sqlite3';
import type { IDatabaseConnection, QueryResult } from '../core/interfaces.js';
export declare class NativeConnectionManager implements IDatabaseConnection {
    private db;
    private readonly dbPath;
    private initialized;
    constructor(dbPath: string);
    initialize(): Promise<void>;
    private migrateSchema;
    applyTeamSchema(): void;
    /**
     * @internal QUARANTINED
     * Maps better-sqlite3 results to the legacy `{ columns: string[], values: unknown[][] }[]` shape
     * Because better-sqlite3 returns arrays of objects instantly, we map them out.
     */
    exec(sql: string, params?: unknown[]): QueryResult[];
    /**
     * @internal QUARANTINED
     * Wrapper for INSERT/UPDATE/DELETE
     */
    run(sql: string, params?: unknown[]): void;
    scheduleSave(): void;
    flushSave(): void;
    close(): void;
    private ensureDb;
    /**
     * Installs a bounded LRU prepared-statement cache on `db.prepare()` so all
     * callers benefit from statement reuse without schema-invalidation leaks.
     */
    private installStatementCache;
    pragma(command: string): void;
    /**
     * @internal
     * Restricted to internal SQLite components only
     */
    getNativeDb(): Database;
    getDbPath(): string;
    getBackupsDir(): string;
    closeDbBeforeRestore(): void;
    setDbAndInitialized(db: unknown): void;
    getVectorMetadata(key: string): string | undefined;
    setVectorMetadata(key: string, value: string): void;
    createVecTable(dimensions: number): void;
    dropVecTable(): void;
}
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