> For the complete documentation index, see [llms.txt](https://docs.syfu.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.syfu.io/official-information-and-archives/how-to-use.md).

# 13.1 How to Use This GitBook

* This document is the **official guide** summarizing the latest specifications of SyFu.
* [**Whitepaper**](https://docs.google.com/document/d/1WqmCv53QlwY8erA3G-8f27FY_7Q0gWFzn7rCJ_hVR80/edit?tab=t.0): The foundation — philosophy, long-term vision, and principles (rarely changes).
* **GitBook**: Operational specifications and manuals — continuously updated to reflect the latest version.
* **Product Site**: The public-facing portal for branding, user experience, and outreach.

👉 If in doubt, remember: **“GitBook = latest info, Whitepaper = fundamental principles.”**