Here is what I mean by a specification:
In computing, a programming language specification (or standard or definition) is a documentation artifact that defines a programming language so that users and implementors can agree on what programs in that language mean. Specifications are typically detailed and formal, and primarily used by implementors, with users referring to them in case of ambiguity (source: Wikipedia)
If you would like to discuss ZGL specifications, please visit the Zulip forum.
This table summarizes the current specification status: