Function restoreBackup

pkg/cmd/skills/update/update.go:512–520

restoreBackup undoes a partial swap by removing any freshly installed entries and moving the original entries back from backup into dest.

(dest, backup string, movedOut, movedIn []string)

// restoreBackup undoes a partial swap by removing any freshly installed
// entries and moving the original entries back from backup into dest.
func restoreBackup(dest, backup string, movedOut, movedIn []string) {
	for _, name := range movedIn {
		_ = os.RemoveAll(filepath.Join(dest, name))
	}
	for _, name := range movedOut {
		_ = os.Rename(filepath.Join(backup, name), filepath.Join(dest, name))
	}
	_ = os.RemoveAll(backup)
}

// scanAllAgents walks every registered agent's skill directory (project + user scope) and
// collects installed skills. Shared install roots are scanned only once.