firebase-basics

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

• Potentially malicious external URL detected (high risk: 0.90). The skill explicitly instructs running "gemini extensions install https://github.com/firebase/agent-skills", which at runtime fetches and installs code from that GitHub repository (executing remote code) as part of the required Gemini CLI setup, so it directly introduces a remote, executable dependency.