The reference material.
The onboarding guide teaches you how the harness works. The architecture guide shows you where it runs. This is the place you come after both — when you need the full catalogue, the complete tech-stack inventory, the file paths to every pattern, in one scrollable page.
What lives in here
Reference pages are deliberately denser than the onboarding chapters. They assume you already know why something exists — they exist to answer "what's the complete list?" and "where exactly does it live?"
How it relates to the other guides
Ready? Open Patterns & Technologies — it's a long page on purpose. Use the right-hand on-page table of contents to jump.