/**
 * Backup utilities for AgenShield installation
 *
 * Saves installation state before migration to enable safe uninstall.
 * Backup is stored in /etc/agenshield/backup.json (root-owned, mode 600).
 */
import type { InstallationBackup, OriginalInstallation, SandboxUserInfo, MigratedPaths } from '@agenshield/ipc';
export interface SaveBackupParams {
    originalInstallation: OriginalInstallation;
    sandboxUser: SandboxUserInfo;
    migratedPaths: MigratedPaths;
}
/**
 * Save installation backup before migration
 */
export declare function saveBackup(params: SaveBackupParams): {
    success: boolean;
    error?: string;
};
/**
 * Load installation backup
 * Returns null if no backup exists or if read fails
 */
export declare function loadBackup(): InstallationBackup | null;
/**
 * Check if a backup exists
 */
export declare function backupExists(): boolean;
/**
 * Delete the backup file (called after successful uninstall)
 */
export declare function deleteBackup(): {
    success: boolean;
    error?: string;
};
/**
 * @deprecated No longer used — migration is now non-destructive (read-only copy).
 * The original config directory is never touched. Kept for backward compatibility.
 */
export declare function backupOriginalConfig(_configPath: string): {
    success: boolean;
    backupPath?: string;
    error?: string;
};
/**
 * Restore the original config from backup
 * Used during uninstall to restore the original config
 */
export declare function restoreOriginalConfig(backupPath: string, targetPath: string): {
    success: boolean;
    error?: string;
};
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