The main problem it solves: rebuilding the same environment every time you switch machines or update a container. All OpenCode state (sessions, settings, MCP configs, plugins) lives in a bind mount outside the container. Rebuild or update the image, your state comes back.

*On the API key cost angle:*

If you pay for Claude Max or Pro, you can use those credentials directly instead of a separate Anthropic API key. One env var enables it. The plugin reads from the credentials file OpenCode stores on your host. This removes a layer of cost if you're already paying for a subscription.

Note: this may be outside what Anthropic's ToS covers. The README is explicit about that.

It supports 10+ AI providers (Anthropic, OpenAI, Gemini, Groq, Bedrock, Azure, Ollama, and more). The Claude subscription feature is optional. Set any provider key and it works.

oh-my-openagent is also included as an optional plugin (`ENABLE_OH_MY_OPENAGENT=true`). It turns OpenCode into a coordinated multi-agent system with parallel execution and specialized agents.

GitHub: https://github.com/coderluii/holycode Docker Hub: https://hub.docker.com/r/coderluii/holycode