For packages added to the report display because they are dependencies of other packages in the module set, it would be very useful to be able to mouse-over the light-shaded square and see what packages depend on that package - in the same way that you can mouse over the dark-square for a package added because a file was present in the upstream runtime and see what file caused it to be added.

Why is ctags being pulled into the SDK? Ah, because source-highlight depends on it.

You can get that information by running fedmod resolve-deps --verbose $(cat out/freedesktop-Sdk.packages) 2>&1 | less but it's super-awkward.

Implementing this would require extending fedmod resolve-deps to be able to get the information from --verbose in machine-readable form.