Any contributions to the guide itself should be made via the guide’s project repo. Contributions should only be made in the proper repo against the latest content. Please don’t open PRs for versioned or stable content, they represent point-in-time state.
We are currently developing release version 5.0. You can read the latest development documents in our official GitHub repository or view the bleeding-edge content at latest.
v4.2 is currently available as a web-hosted release and PDF. Previous releases are available as PDFs and in some cases web content via the Release Versions tab.