firebase-security-rules-auditor is the Firebase team's agent skill for auditing Firestore and Cloud Storage security rules for privilege escalation, update bypasses and missing limits, returning a 1 to 5 score in JSON.
Firebase (Google) agent skills
Firebase (Google) publishes 1 agent skill listed here, from firebase/agent-skills (462 GitHub stars, last push October 1, 2026). The Firebase team's own skills, published from the firebase GitHub organization and also packaged as a Gemini CLI extension.