vibe-open-auth

OpenCode plugin for Google Antigravity and Kiro (AWS CodeWhisperer) APIs. Access Claude and Gemini models using Google or AWS credentials.

Fork of opencode-antigravity-auth with Kiro support and additional fixes.

Features

• Google Antigravity - Access Claude and Gemini via Google OAuth
• Kiro (AWS) - Access Claude Opus/Sonnet via AWS Builder ID
• Dual Quota System - Antigravity + Gemini CLI quota
• Multi-Account Rotation - auto-switches on rate limit
• Session Recovery - auto-recover from tool_result_missing errors

Quick Start

Add to ~/.config/opencode/opencode.json:

{
  "plugin": ["github:frankekn/vibe-open-auth"],
  "provider": {
    "google": {
      "models": {
        "kiro-claude-opus-4-5": {
          "name": "Claude Opus 4.5 (Kiro)",
          "limit": { "context": 200000, "output": 64000 },
          "modalities": { "input": ["text", "image"], "output": ["text"] }
        },
        "kiro-claude-sonnet-4-5": {
          "name": "Claude Sonnet 4.5 (Kiro)",
          "limit": { "context": 200000, "output": 64000 },
          "modalities": { "input": ["text", "image"], "output": ["text"] }
        },
        "antigravity-claude-opus-4-5-thinking": {
          "name": "Claude Opus 4.5 Thinking (Antigravity)",
          "limit": { "context": 200000, "output": 64000 },
          "modalities": { "input": ["text", "image", "pdf"], "output": ["text"] },
          "variants": {
            "low": { "thinkingConfig": { "thinkingBudget": 8192 } },
            "max": { "thinkingConfig": { "thinkingBudget": 32768 } }
          }
        },
        "antigravity-gemini-3-flash": {
          "name": "Gemini 3 Flash (Antigravity)",
          "limit": { "context": 1048576, "output": 65536 },
          "modalities": { "input": ["text", "image", "pdf"], "output": ["text"] },
          "variants": {
            "low": { "thinkingLevel": "low" },
            "high": { "thinkingLevel": "high" }
          }
        }
      }
    }
  }
}

Usage

# Kiro (requires Kiro IDE login first)
opencode run "Hello" --model=google/kiro-claude-opus-4-5

# Antigravity (requires Google OAuth)
opencode run "Hello" --model=google/antigravity-claude-opus-4-5-thinking --variant=max

Available Models

Kiro (AWS CodeWhisperer)

Requires: Login to Kiro IDE first (uses ~/.aws/sso/cache/kiro-auth-token.json)

All Kiro models have extended thinking enabled by default.

Model	Description
kiro-claude-opus-4-5	Claude Opus 4.5 with extended thinking
kiro-claude-sonnet-4-5	Claude Sonnet 4.5 with extended thinking

Antigravity (Google)

Requires: opencode auth login with Google account

Model	Variants
antigravity-gemini-3-pro	low, high
antigravity-gemini-3-flash	minimal, low, medium, high
antigravity-claude-sonnet-4-5	-
antigravity-claude-sonnet-4-5-thinking	low, max
antigravity-claude-opus-4-5-thinking	low, max

Gemini CLI

Model
gemini-2.5-flash
gemini-2.5-pro
gemini-3-flash-preview
gemini-3-pro-preview

Configuration

Create ~/.config/opencode/antigravity.json:

{
  "quiet_mode": false,
  "debug": false,
  "session_recovery": true,
  "auto_resume": true
}

Debug mode:

OPENCODE_ANTIGRAVITY_DEBUG=1 opencode

Multi-Account

Add multiple Google accounts for higher quota:

opencode auth login

Accounts auto-rotate when rate limited.

Credits

• opencode-antigravity-auth - Original plugin by @NoeFabris
• opencode-gemini-auth - Gemini OAuth groundwork by @jenslys

License

MIT