The new ClassicPress Documentation Hub is now live with user and developer guides as well as the Plugins Guidelines for the ClassicPress Plugin Directory, but the big addition is the ClassicPress Code Reference.
The bulk of the work done to build the new site was done by Beda Schmid who also wrote the announcement post on the ClassicPress blog.
The code reference means that developers can now look up any of the 2,814 methods, 2,874 functions, 280 classes and 2,063 hooks from the ClassicPress code instead of having to use the old WordPress code reference which would include all of the Gutenberg additions.
Full details on what has been added to the ClassicPress Documentation Hub can be read in the announcement.