Just to clarify, does Athens have a production build to begin with? I'm under the impression that the beta builds were the current versions that are distributed.
I believe production here means the downloads available on the releases, where as a development means when you download the repo and run it manually. There are no builds beyond those betas.
For instance, as of Athens Beta.89, there's signicant stutter when toggling the sidebars open or closed, which is not present in the production build.