import type { StoreAdapter, StoreOps } from "./store.js";
export interface EngineOverAdapterOptions {
    /** What `insertIfAbsent` and `compareAndSwap` do when the adapter's door omits
     *  the OPTIONAL `RecordStore.atomic` capability (02-store §4).
     *
     *  `degrade` (the default) falls back to the check-then-put each caller used
     *  to hand-roll, so moving a block onto this family never turns a working BYO
     *  adapter into a `not-implemented`.
     *
     *  `require` refuses instead. For the caller whose atomics carry a security
     *  meaning — a guard's single-use approval transition, where a read-then-write
     *  is not single-use — failing closed here is the same answer the hosted wire
     *  gives, and a degraded write would be a silently weaker one. */
    atomics?: "degrade" | "require";
}
/** The `engine` family over a bare {@link StoreAdapter}.
 *
 *  Every block that owns Vendo drawers (automations, guard, apps) reads them
 *  through `ops.engine.*`, but `selectStoreOps` answers `undefined` for a store
 *  with neither its own ops surface nor a SQL handle — and a host constructing a
 *  block DIRECTLY passes only a `StoreAdapter`. This is that store's engine
 *  family: the allowlist gate in front, the adapter's own record door behind.
 *  It lives in core because none of those blocks may import `@vendoai/vendo/store`.
 *
 *  `records()` is called per verb and never cached: an adapter is free to mint a
 *  fresh handle each time, and fixtures that wrap one to inject a failure depend
 *  on it. */
export declare function engineOverAdapter(store: StoreAdapter, options?: EngineOverAdapterOptions): StoreOps["engine"];