import { type StoreAdapter } from "../index.js";
/**
 * Reference in-memory StoreAdapter: used by unit tests, and as createAgent's
 * no-store default (03-agent §1, kill-list B5). Process-lifetime only — not
 * durable persistence.
 *
 * Double-level behavior (NOT contract — the conformance suite does not assert
 * it): `list()` returns records newest-first by `createdAt`, most recently
 * CREATED first on ties (updates do not reposition a record, matching a
 * Postgres `ORDER BY created_at DESC` with a stable tiebreak). This mirrors
 * the ordering the store block's adapter is being built with, so block unit
 * tests behave like their integration fixtures. Do not depend on ordering
 * across arbitrary StoreAdapters until the contract pins it.
 */
export interface MemoryStoreAdapterOptions {
    /** Deterministic clock for test assertions. */
    timestamp?: () => string;
}
export declare function memoryStoreAdapter(options?: MemoryStoreAdapterOptions): StoreAdapter & {
    ensureSchema(): Promise<void>;
};