import type { MemoryBlockScope, PersistentMemoryBlock, PersistentMemoryStore } from './types.js';
/**
 * Nested by (scope, owner, key) rather than a joined string — a `Map` can key
 * on any value, so there is nothing to flatten and therefore nothing that can
 * rearrange across a delimiter. The previous `` `${scope}:${owner}:${key}` ``
 * composition made `(owner: 'a:b', key: 'K')` and `(owner: 'a', key: 'b:K')`
 * the same map entry, and `listBlocks`'s prefix scan compounded it by also
 * matching owner `a`'s scan against owner `a:b`'s rows.
 */
export declare class InMemoryPersistentMemoryStore implements PersistentMemoryStore {
    private readonly blocks;
    private ownerBlocks;
    loadBlock(scope: MemoryBlockScope, owner: string, key: string): Promise<PersistentMemoryBlock | null>;
    saveBlock(block: PersistentMemoryBlock, owner: string): Promise<void>;
    deleteBlock(scope: MemoryBlockScope, owner: string, key: string): Promise<void>;
    listBlocks(scope: MemoryBlockScope, owner: string): Promise<string[]>;
}