Currently, refinements are not inherited by Module#include.
How about to make using to activate refinements in the ancestors of the specified module?

For example,

module A
refine X do ... end
refine Y do ... end
end
module B
refine Z do ... end
end
module C
include A
include B
end

using C

Refinements in A and B are activated here.¶

In this code,

using C

is equivalent to

C.ancestors.reverse_each { |m| using m }

This feature enables you to distribute refinements into different modules, and then package the refinements into one module.

Please note that Module#include does't activate refinements in the argument module.

For example,

module C
include A
include B

# Refinements in A and B are not activated here.

end

I've implemented this feature, and have attached the patch.