Sign the dist as the last step before creating the archive. Take care not to modify/regenerate dist meta files or the manifest.

Error: Old SIGNATURE detected. Please inform the module author to regenerate SIGNATURE using Module::Signature version 0.82 or newer. gpg: Signature made Mon 30 Mar 2009 08:05:01 AM JST gpg: using DSA key 75D516AF317D99C7 gpg: Can't check signature: No public key ==> BAD/TAMPERED signature detected! <==

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

Fix the problematic entry.

Error: Unescaped left brace in regex is passed through in regex; marked by <-- HERE in m/(?:^${dist_path}/${dist_name}-${dist_version}\.tar\.gz$)|(?:^${dist_path}/${dist_name}-${dist_version}-PPM\.tar\.gz$)|(?:^${dist_path}/${dist_name}-${dist_version}\.tgz$)|(?:^${dist_path}/${dist_name}\.ppd$)|(?:^${dist_path}/${dist_name}-${dist_version}-[^/]*\.par$)|(?:^${dist_path}/${dist_name}-${ <-- HERE dist_version}/)|(?:(?:^|/)lib/.*\.(bs|c|def|obj|o|pdb|base|exp|lds)$)|(?:(?:^|/)vc90\.pdb$)|(?:(?:^|/)Build$)|(?:(?:^|/)Build.bat$)|(?:(?:^|/)_build/)|(?:(?:^|/)MANIFEST\.bak$)|(?:(?:^|/)Makefile$)|(?:(?:^|/)blib/)|(?:(?:^|/)MakeMaker-\d)|(?:(?:^|/)pm_to_blib\.ts$)|(?:(?:^|/)pm_to_blib$)|(?:(?:^|/)blibdirs\.ts$)|(?:(?:^|/)\.build$)|(?:(?:^|/)\.build.xml$)|(?:(?:^|/)RCS\b)|(?:(?:^|/)CVS\b)|(?:(?:^|/)SCCS\b)|(?:,v$)|(?:(?:^|/)\.svn\b)|(?:(?:^|/)_darcs\b)|(?:(?:^|/)\.hg/)|(?:(?:^|/)\.hgtags$)|(?:(?:^|/)\.hgignore$)|(?:~$)|(?:\.old$)|(?:\#$)|(?:(?:^|/)\.#)|(?:\.bak$)|(?:\.tmp$)|(?:(?:^|/)null$)|(?:(?:^|/)cover_db/)/ at lib/ExtUtils/Manifest.pm line 440.

Add a 'repository' resource to the META.yml via 'meta_add' accessor (for Module::Build) or META_ADD parameter (for ExtUtils::MakeMaker).

Add SECURITY(.pod|md). See Software::Security::Policy.

Add SECURITY(.pod|md) and add a contact address. See Software::Security::Policy.

Add CONTRIBUTING(.pod|md). See https://docs.github.com/en/communities/setting-up-your-project-for-healthy-contributions/setting-guidelines-for-repository-contributors.