The skill appears to be a legitimate GitHub backup and restore tool, but it includes under-scoped autonomous actions and credential persistence risks that users should review before installing.
Install only if you are comfortable with a skill that can read and mutate selected workspace files, restore from GitHub, and potentially push changes. Before use, review the scripts and agent instructions, prefer gh-based or temporary authentication over persistent git credential storage, back up the current workspace before restore, and require explicit confirmation before any commit, push, deletion, or restore operation.