After 4 years of use, I decided to reset my Mac, cleaning up years of garbage in some folders. Surprisingly I was able to recover 20 GB of free space (which is a lot on a 128 GB SSD).
My workflow is quite simple, and I don't have a lot o apps installed. Besides the built-in and 1st party apps, I have, from the App Store: BBEdit and WhatsApp; and from other sources: Matlab, Skype, TeXShop, MacTeX, and OpenVPN.
I am not a developer, so I never installed Xcode, nor the Command Line Developer Tools (CLDT). So why would my two days old fresh installation keeps bugging me to install either the full Xcode or CLDT, when I'm sure I'm not running CC (or any other compilator, for that matter).
I doubt that among my handful of apps, one may be the culprit. But does any one know of any similar behavior.
P.S.: Just to make this point clear. I've made a clear from scratch installation. The only thing carried over was my iCloud content. No recovering from backups of any kind.