The guides
One guide ships today, and it is the whole of it — the overview, a page per platform, the options, the events it fires, and the security model.
Straight to your platform
The install steps are one page per platform rather than one long page with 7 headings, so nobody scrolls past WordPress to reach Squarespace. Each of these opens on the three steps for that builder, and names the menu item you are looking for.
Reference
Two pages that belong to every platform at once rather than to any one of them.
What every guide has to tell you
The snippet is Two lines and one of them is a <script> tag, which means it is somebody else’s code running on your website. Every guide here therefore carries a plain-English section on what that code can reach, what it records, and where the edges of that are.
Anything that runs on somebody else’s website says what it does.