CPANTS

Attribute-Boolean v1.0.6

This is not the latest release. The following issues may have already been fixed in the newer releases.

no_mymeta_files: Update MANIFEST.SKIP to exclude MYMETA files. If you are lazy, add "#!install_default" in your MANIFEST.SKIP and update your ExtUtils::Manifest if necessary, then some of the most common files will be excluded.
main_module_version_matches_dist_version: Make sure that the main module name and version are the same of the distribution.

Define the license if you are using in Build.PL. If you are using MakeMaker (Makefile.PL) you should upgrade to ExtUtils::MakeMaker version 6.31.

Fix the version numbers so that version::is_lax($version) returns true.

Error:

meta_yml_has_provides: Add all modules contained in this distribution to the META.yml field 'provides'. Module::Build or Dist::Zilla::Plugin::MetaProvides do this automatically for you.
meta_yml_has_repository_resource: Add a 'repository' resource to the META.yml via 'meta_add' accessor (for Module::Build) or META_ADD parameter (for ExtUtils::MakeMaker).
has_separate_license_file: This is not a critical issue. Currently mainly informative for the CPANTS authors. It might be removed later.

Name	Abstract	Version	View
Attribute::Boolean	Mark scalars as pure booleans		metacpan
Attribute::Boolean::Value	An overridden class for a boolean value		metacpan