/**
 * Dependency-free database runtime facts. Kept out of `./client.js` so the
 * store runner does not require every `vi.mock("../db/client.js")` to stub them.
 */
export declare function retryOnDdlRace<T>(fn: () => Promise<T>): Promise<T>;
/**
 * Bumped by `closeDbExec()` and dev reloads. State cached per database (schema
 * snapshots, store readiness) compares against it instead of importing the
 * client, so modules that mock `./client.js` keep working.
 */
export declare function dbClientGeneration(): number;
/**
 * True while a store migration runs that the ledger will record once it
 * resolves. Helpers that swallow failures elsewhere must rethrow here, or the
 * ledger records a step that never happened and never retries it.
 */
export declare function isRecordingStoreMigration(): boolean;
export declare function runRecordingStoreMigration<T>(run: () => Promise<T>): Promise<T>;