/**
 * Restore swap and slot bookkeeping (ADR-0001 "Backup Port", B5 steps 6-8).
 * Renames only: callers check that all paths share one filesystem.
 */
import { rename } from 'node:fs/promises';
/** One path to replace: `staged` moves in, the current `live` moves to the slot. */
export interface RestoreTarget {
    live: string;
    staged: string | null;
}
/** Filesystem calls of the swap; tests replace `rename` to inject failures. */
export declare const fsOps: {
    rename: typeof rename;
};
/** Moves live → slot and staged → live; rolls back in reverse on failure (K2, R4). */
export declare function swapIntoPlace(root: string, oid: string, targets: RestoreTarget[], stamp: string): Promise<string>;
export declare function incompleteSlots(root: string): Promise<string[]>;
export declare function rotateSlots(root: string): Promise<void>;
export declare function cleanStaging(root: string): Promise<void>;
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