In the network graph hovering over charig/2-March commit I see a new platform Nopsys added for SqueakNOS. [A] https://github.com/OpenSmalltalk/opensmalltalk-vm/network Thats cool !!! It'll be great to see this work with OpenSmalltalk. However I notice its been added as a submodule. [B] https://github.com/charig/opensmalltalk-vm/commit/2bd87b525b6b46439c90506c0a... Submodules bring additional complexity, so I thought there should be some discussion on this topic. Here are a couple of balanced introductions to submodules... [C] http://www.catalyst-au.net/blog/git-submodule-misunderstood-beast-or-remorse... [D] https://www.philosophicalhacker.com/post/using-git-submodules-effectively/ And a couple of cautions about using them... [E] http://slopjong.de/2013/06/04/git-why-submodules-are-evil/ [F] https://rufflewind.com/2017-02-21/quirks-with-submodules Guido & Javier, Have you used submodules successfully elsewhere? Could you discuss your strategy using a submodule for the platform code rather than adding directly into the opensmalltalk-vm repository? I see your parent repository includes opensmalltalk-vm as a submodule similar to how I *thought* Pharo was doing it, but wait on comment from Esteban. . [G] https://github.com/charig/Nopsys [H] https://github.com/charig/Nopsys/blob/master/.gitmodules So it seems platforms/Nopsys is a sub-sub-module. Esteban, I thought that you were using submodules to incorporate opensmalltlak-vm into the pharo-vm, but I can't see a .gitmodules file there. [I] https://github.com/pharo-project/pharo-vm So did you do it another way, or am I missing something? Could you report your experience with adding opensmalltalk-vm into the pharo-vm repository? cheers -ben