code-exec-skills

MEDIUM W012: Unverifiable external dependency detected (runtime URL that controls agent).

• Potentially malicious external URL detected (high risk: 0.70). The Nix configuration in sandbox-execution-guide/SKILL.md uses fetchTarball to download a Nixpkgs archive from GitHub at runtime, which constitutes an unverifiable runtime external dependency from an unofficial/third-party vector, resulting in a high risk tier.