import Database from 'better-sqlite3';
import { RETENTION_CONFIG } from './schema.js';
/**
 * Get or create the database instance
 */
export declare function getDatabase(): Database.Database;
/**
 * Initialize the database
 * - Creates data directory if missing
 * - Opens/creates database file
 * - Runs migrations
 * - Sets WAL mode for better performance
 */
export declare function initDatabase(dbPath?: string): Database.Database;
/**
 * Create an in-memory database for testing
 */
export declare function initTestDatabase(): Database.Database;
/**
 * Close the database connection
 */
export declare function closeDatabase(): void;
/**
 * Get database statistics for debugging
 */
export declare function getDatabaseStats(): {
    sessions: number;
};
export { RETENTION_CONFIG };
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