Gemini CLI extension stop-serve date: June 18, 2026

With Gemini CLI transitioning to Antigravity CLI, the Firebase extension for Gemini CLI will stop working starting June 18, 2026, when Gemini CLI stops serving requests for individual, Google AI Pro, and Google AI Ultra tiers. To avoid service disruption, migrate to Antigravity CLI using the Gemini CLI migration guide before this date. If you're a new user, follow the instructions to install Firebase agent skills directly.