skill-install

Overall, the skill's stated purpose and workflow are largely coherent: it fetches skill definitions from GitHub, performs security scanning, and installs vetted skills into a user-writable directory. The data flows are appropriate for the task, and credential exposure is not indicated. Minor supply-chain risk exists due to dependency on external repository contents, but it is mitigated by mandatory security scans. The approach is proportionate to the task, with no anomalous credential or exploit vectors evident in the description.