Tree-Compat 1.00 Deleted
Add a README to the distribution. It should contain a quick description of your module and how to install it.
Add a META.json to the distribution. Your buildtool should be able to autogenerate it.
Ask the owner of the distribution (the one who released it first, or the one who is designated in x_authority) to give you a (co-)maintainer's permission.
This is not a critical issue. Currently mainly informative for the CPANTS authors. It might be removed later.
Add a 'repository' resource to the META.yml via 'meta_add' accessor (for Module::Build) or META_ADD parameter (for ExtUtils::MakeMaker).