opencode/opencode.json

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {},
  "provider": {
    "openrouter": {
      "npm": "@openrouter/ai-sdk-provider",
      "name": "OpenRouter",
      "models": {
        "anthropic/claude-sonnet-4": {}
      }
    }
  }
}