import type { PersistentMemoryStore, PersistentMemoryBlock, MemoryBlockScope } from './types.js';
export interface FilePersistentMemoryStoreOptions {
    /** Root directory. Defaults to `KURALLE_MEMORY_DIR` or `~/.kuralle/memories`. */
    rootDir?: string;
}
export declare class FilePersistentMemoryStore implements PersistentMemoryStore {
    readonly rootDir: string;
    constructor(opts?: FilePersistentMemoryStoreOptions);
    private pathFor;
    private dirFor;
    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[]>;
}