SakanaAI/fugu — reverse-engineered prompt

Build me a simple Codex integration for Sakana Fugu so it feels like using one normal model, even though it is doing smarter multi step coordination behind the scenes.

I want a smooth setup experience with a one command installer for macOS and Ubuntu, and a manual setup path for Windows or if the install script does not work. After setup, I should be able to run codex-fugu and start using it right away through the Sakana API. Please support both chat style requests and the newer responses style API, include any needed config and scripts, and make the command options easy to understand.

Also add clear docs for getting started, authentication, installation troubleshooting, and the available command flags. Keep the focus on making this easy to install and use, not on recreating the research itself, but do explain that Fugu is a single interface to a multi agent system. If you need missing details, look up the current Codex and Sakana API docs online.