import { DatabaseSync, type StatementSync } from "node:sqlite";
export type Database = DatabaseSync;
export type Statement = StatementSync;
export declare const CURRENT_DATA_VERSION = 10;
export declare function createDatabase(dbPath: string): Database;
/**
 * Read the stored data version. Returns 0 for fresh databases that
 * have never been tagged, so callers can treat any version < current
 * as "migrate me".
 */
export declare function getDataVersion(db: Database): number;
/**
 * Stamp the database with the current data version. Call after a
 * migration completes (or on a fresh database after the first full
 * index, so subsequent runs don't waste time re-migrating).
 */
export declare function setDataVersion(db: Database, version: number): void;
/**
 * Embedding fingerprint persisted to `meta` so the indexer can detect
 * silent provider/dimension changes across runs (issue #69). Stored as
 * JSON because `EmbeddingFingerprint` may grow new fields. Shape mirrors
 * `EmbeddingFingerprint` in embedding-providers.ts — we re-declare it as
 * a plain record here to keep storage/ free of indexer/ imports.
 */
export type StoredFingerprint = {
    provider: string;
    dimensions: number;
};
export declare function getStoredFingerprint(db: Database): StoredFingerprint | null;
export declare function setStoredFingerprint(db: Database, fp: StoredFingerprint): void;
/**
 * BEGIN / COMMIT / ROLLBACK helper. better-sqlite3 had `db.transaction(fn)`
 * built in; node:sqlite doesn't, so we wrap the pattern explicitly.
 * Used by Indexer.index() for the bulk-insert path.
 */
export declare function transaction<T>(db: Database, fn: () => T): T;