Kwalitee Issues


Add a Changelog (best named 'Changes') to the distribution. It should list at least major changes implemented in newer versions.


Run a proper command ("make manifest" or "./Build manifest", maybe with a force option), or use a distribution builder to generate the MANIFEST. Or update MANIFEST manually.


  • MANIFEST (17) does not match dist (16):
  • Duplicates in MANIFEST: SIGNATURE


Take a look at the META.yml Spec at (for version 1.4) or (for version 2), and change your META.yml accordingly.

Error: '' for 'Test::Class' is not a valid version. (build_requires -> Test::Class) [Validation: 1.0];'' for 'Test::Exception' is not a valid version. (build_requires -> Test::Exception) [Validation: 1.0];'' for 'Test::Pod' is not a valid version. (build_requires -> Test::Pod) [Validation: 1.0];'' for 'Test::Pod::Coverage' is not a valid version. (build_requires -> Test::Pod::Coverage) [Validation: 1.0]


Add a META.json to the distribution. Your buildtool should be able to autogenerate it.


If you are using Build.PL define the {requires}{perl} = VERSION field. If you are using MakeMaker (Makefile.PL) you should upgrade ExtUtils::MakeMaker to 6.48 and use MIN_PERL_VERSION parameter. Perl::MinimumVersion can help you determine which version of Perl your module needs.


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).


Name Abstract Version View
Class::StorageFactory base class for factories to store and fetch objects 1.0 metacpan
Class::StorageFactory::YAML object factory to fetch and store objects via YAML metacpan

Other Files

Build.PL metacpan
MANIFEST metacpan
META.yml metacpan
README metacpan