import type { GraphSnapshot, GraphSnapshotDiff } from './types';
/** Returns the absolute directory where snapshots are stored. Created on demand. */
export declare function snapshotDir(graphCacheDir: string): string;
/** Persists a snapshot to `<graphCacheDir>/snapshots/<label>.json`. */
export declare function saveSnapshot(graphCacheDir: string, snapshot: GraphSnapshot): string;
/** Loads a snapshot by label. Throws if missing or malformed. */
export declare function loadSnapshot(graphCacheDir: string, label: string): GraphSnapshot;
/** Lists all snapshot labels currently persisted under `graphCacheDir`. */
export declare function listSnapshots(graphCacheDir: string): string[];
/** Diffs two persisted snapshots by label. */
export declare function diffSnapshotsByLabel(graphCacheDir: string, labelA: string, labelB: string): GraphSnapshotDiff;
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