@AdrianVovk not the udisks part. Really partitioning, and in a host system-agnostic manner.
I have had a look at many of the existing tools, even contributed to what is currently the best we have all around, but I think there's nothing out there that would help, compared to building from the ground up.
To be fair, I haven't had a look at repart, since it is purpose built to “Grow and add partitions to partition table”.
Anyways, I don't have a plan or anything, other than knowing that all current tools are incomplete, and sometimes wrong in really particularly specific ways. (But mostly good for most use cases!)