[kortex]

You might wanna check out https://copier.readthedocs.io/en/stable/

Dunno if it's your exact use case but it's been amazing for keeping a polyrepo microservice ecosystem in sync.

[strangelove026]

I’m familiar! I recently built something with projen. Projen is quite cool because you can mark templates as “managed,” which means they’re read only in the repo. Establishes a contract of “any edit to this file will be lost”