interface CallableBridge {
    isConnected: boolean;
    call(method: string, params: Record<string, unknown>): Promise<unknown>;
}
export interface GitSnapshotConfig {
    enabled: boolean;
    paths: string[];
    snapshot_dir: string;
}
export interface Snapshot {
    treeHash: string;
    projectDir: string;
    gitDir: string;
    workTree: string;
    paths: string[];
    /** Absolute paths that existed at snapshot time. Used to diff on rollback. */
    tracked: Set<string>;
}
/**
 * Snapshot the given paths (relative to projectDir) into a shadow bare git repo.
 * Returns a handle that can be passed to `restoreSnapshot` to reset those paths.
 * Throws if any required tool (git) is missing.
 */
export declare function takeSnapshot(projectDir: string, paths: string[], snapshotDir: string): Snapshot;
/**
 * Restore the snapshotted paths. Files that were added after the snapshot are
 * removed; files that were modified are reverted; files that existed at
 * snapshot time are restored to their snapshot contents.
 */
export declare function restoreSnapshot(snap: Snapshot): {
    changedPaths: string[];
};
/**
 * Best-effort call to reload_package on every Content-rooted .uasset / .umap
 * that changed during restore, so the editor drops stale in-memory copies.
 */
export declare function reloadAffectedPackages(bridge: CallableBridge, projectDir: string, changedPaths: string[]): Promise<{
    reloaded: number;
    errors: number;
}>;
/**
 * Delete snapshot refs older than `maxAgeMs`. Call opportunistically so the
 * shadow repo doesn't grow unboundedly.
 */
export declare function pruneOldSnapshots(snapshotDir: string, maxAgeMs: number): void;
export {};