To drive the DS1388 I used https://github.com/jcw/rtclib , I modified the lib adding a DS1388 class.
I could fork the original lib on github, add my modifications, and you can then add yours.
Or we can do the opposite: you fork (or just start a new repo if yours does not inherit from RTCLib) and I add my modifications (if needed).
I think that github is a very good way to distribute development efforts and maintain the code.
I don't think this lib will ever go into the Arduino core, there are so many chips out there that supporting them all would be a real nightmare for core maintainers.