Reedtrullz/hermes-antigravity-auth ? reverse-engineered prompt

Build me the Hermes Antigravity Auth plugin setup so I can use Google Antigravity OAuth inside Hermes Agent.

I want to be able to log in with my Google account, choose the Antigravity provider, and use the Claude and Gemini models it supports from Hermes. Please include the install and setup flow, the credentials step, the plugin enablement in the Hermes config, and a simple way to verify everything is working after login.

If you need to check the latest install or login details, look up the current docs online first. Make the experience feel like a clean one step setup for a normal user, with helpful errors and recovery if the auth or account setup goes wrong. Also make sure it supports multiple accounts and switches accounts when one hits a rate limit or auth problem.