This is very interesting as this is almost identical to how the Haiku Operating System does package management using their own packaging format (hpkg) which uses packagefs. [0] [1]
This format is used more than just to package applications, but to update the whole OS in a consistent manner [2] as it is also versioned in with shared-libraries and this was implemented in 2013.
This format is used more than just to package applications, but to update the whole OS in a consistent manner [2] as it is also versioned in with shared-libraries and this was implemented in 2013.
[0] - https://www.haiku-os.org/blog/zooey/2011-01-08_package_manag...
[1] - https://www.haiku-os.org/guides/daily-tasks/install-applicat...
[2] - https://www.haiku-os.org/blog/bonefish/2011-06-20_package_ma...