What do you think in a project multi-module have for instance app core(or whatever) feature1 feature2 feature3 navigation <-- I'm planning to implement navigation to a multi-module project and is it a good praxis to create a navigation module which is included on each feature and inside of it contains all of the navigation between features?

That works, but you cannot use parcelable classes declared in the feature modules as nav arguments

yes, you can declare all parcelable classes and navigation resources in navigation module, then all features can navigate between each other

Thanks 😄