/**
 * SQLite Backend Abstraction
 *
 * Multi-backend support: tries `node:sqlite` (Node 22.5+, zero deps, fastest)
 * first, then falls back to `better-sqlite3` (any Node with prebuilt binary).
 *
 * Both backends expose the same minimal interface needed by the SQLiteAdapter.
 *
 * Note: `node:sqlite` is a built-in module accessed via the `node:` URL scheme.
 * We use createRequire to load it from CJS, since vitest's ESM resolver
 * doesn't recognize the `node:` scheme for built-in modules.
 */
export interface SQLiteConnection {
    /** Execute a multi-statement SQL script with no result */
    exec(sql: string): void;
    /** Prepare a parameterized statement */
    prepare(sql: string): SQLiteStatement;
    /** Set PRAGMA (e.g. foreign_keys = ON) */
    pragma(key: string, value: string): void;
    /** Close the connection */
    close(): void;
}
export interface SQLiteStatement {
    /** Run a SELECT and return all rows as objects */
    all(...params: unknown[]): Record<string, unknown>[];
    /** Run a SELECT and return the first row (or undefined) */
    get(...params: unknown[]): Record<string, unknown> | undefined;
    /** Run INSERT/UPDATE/DELETE; return changes count and lastInsertRowid */
    run(...params: unknown[]): SQLiteRunResult;
}
export interface SQLiteRunResult {
    changes: number;
    lastInsertRowid: number | bigint;
}
export interface SQLiteBackend {
    name: 'node-sqlite' | 'better-sqlite3';
    /**
     * Open a connection to a database file (or ':memory:' for in-memory).
     * `readonly: true` is supported when the backend allows it.
     */
    open(filePath: string, options: {
        readonly?: boolean;
    }): Promise<SQLiteConnection>;
}
export declare function detectSqliteBackend(): Promise<SQLiteBackend>;
export declare function getActiveBackendName(): string | null;
/**
 * Wrap a better-sqlite3-compatible Database instance to expose the
 * SQLiteConnection interface. Used by EncryptedSqliteBackend when opening
 * SQLCipher-encrypted databases via `better-sqlite3-multiple-ciphers`.
 *
 * Exported so other modules (e.g. encrypted-sqlite.ts) can reuse the wrapper.
 */
export declare function wrapBetterSqlite3(db: any): SQLiteConnection;
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