How to implement parallel development of several projects based on one repository?

Question

Laravel

Hello.
We are developing our own CMS based on Laravel. Now the question has become about how to write another application on the basis of this CMS in parallel and continue to develop the CMS itself.
That is, you need to give the second project the opportunity to be updated from the c cms repository, while keeping your developments to yourself. As soon as we push the update to the cms repository, we immediately merge these changes into the second child project.
How to implement it correctly, what will be the opinions?
Thank you!

Answer 1

Separate CMS into a separate repository. Connect via composer or git submodule.