opencode-gemini-auth

Why we included this project

Opencode users who want Gemini models without managing a separate API key can authenticate with their Google account through this plugin. It adds Google as a provider in `opencode auth login`, runs the OAuth flow in a browser, and forwards requests using your existing Gemini plan and quotas, including the free tier. Beyond login, it offers practical controls: pin a specific Google Cloud project for organization-backed subscriptions, route traffic through an HTTP proxy, and whitelist or blacklist which Gemini models appear in the picker. The README is honest about the current risk: Google has deprecated consumer Gemini Code Assist access and flagged third-party OAuth as policy-violating, so teams should weigh that before relying on it, and the manual API key path remains a safer fallback. For developers already standardized on Opencode, this is the most direct way to bring Gemini into that workflow.