import { ObserverStoreBase } from '@struktoai/mirage-core/observe/store';
/**
 * ObserverStore backed by a directory of JSONL files. Created lazily on
 * first append. Mirrors the Python DiskObserverStore.
 */
export declare class DiskObserverStore extends ObserverStoreBase {
    private readonly root;
    constructor(root: string);
    private abs;
    append(key: string, data: Uint8Array): Promise<void>;
    write(key: string, data: Uint8Array): Promise<void>;
    readMatching(suffix: string): Promise<Map<string, Uint8Array>>;
    clear(): Promise<void>;
    private rootIsDir;
    private walk;
}
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