import { type StoreOps } from "@vendoai/core";
import type { Db } from "../db-postgres.js";
import { type VendoStore } from "../store.js";
/** Where a helper's rows actually live for THIS store handle. */
type StoreBackend = {
    kind: "sql";
    db: Db;
} | {
    kind: "ops";
    ops: StoreOps;
};
/**
 * The one selector every store-shaped helper resolves itself through.
 *
 * A helper like `threadMessageStore` used to open with `dbFor(store)` and throw
 * "Unknown VendoStore handle" for anything this package did not mint — which is
 * every hosted deployment, and is why a key-only host could not serve a harness
 * turn. The rows exist either way; only the road to them differs. So: the SQL
 * handle when there is one, the store's own 42-op surface when there is not, and
 * a named refusal only when the store offers neither.
 *
 * SQL wins when both are present. It is the same database, one hop shorter.
 *
 * `what` names the thing being served, so the refusal reads as a fact about the
 * deployment rather than an internals leak.
 */
export declare function backendOf(store: VendoStore, what: string): StoreBackend;
export {};
//# sourceMappingURL=backend.d.ts.map