opencode.json

{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "codex-proxy": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "Codex Proxy",
      "options": {
        "baseURL": "http://localhost:8080/v1",
        "apiKey": "pwd"
      },
      "models": {
        "codex": {
          "name": "Codex (GPT-5.3)",
          "attachment": true,
          "limit": {
            "context": 200000,
            "output": 65536
          }
        }
      }
    }
  }
}