> For the complete documentation index, see [llms.txt](https://yuriai.gitbook.io/yuriai-guidebook/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://yuriai.gitbook.io/yuriai-guidebook/developer-documentation.md).

# Developer Documentation

- [Extensible API](https://yuriai.gitbook.io/yuriai-guidebook/developer-documentation/extensible-api.md)
- [Model of ChatGPT](https://yuriai.gitbook.io/yuriai-guidebook/developer-documentation/model-of-chatgpt.md)
- [Training Human-in-the-loop Reward Learning model](https://yuriai.gitbook.io/yuriai-guidebook/developer-documentation/model-of-chatgpt/training-human-in-the-loop-reward-learning-model.md)
- [Reinforcement Learning Fine-tuning](https://yuriai.gitbook.io/yuriai-guidebook/developer-documentation/model-of-chatgpt/reinforcement-learning-fine-tuning.md)