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.

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

Add 'use warnings' (or its equivalents) to all modules, or convince us that your favorite module is well-known enough and people can easily see the modules warn when something bad happens.

Error: KSx::Index::ZlibDocWriter, KSx::Search::LongFieldSim, KSx::Search::ProximityQuery, KinoSearch::Analysis::Analyzer, KinoSearch::Analysis::CaseFolder, KinoSearch::Analysis::Inversion, KinoSearch::Analysis::PolyAnalyzer, KinoSearch::Analysis::Stemmer, KinoSearch::Analysis::Stopalizer, KinoSearch::Analysis::Token, KinoSearch::Analysis::TokenBatch, KinoSearch::Analysis::Tokenizer, KinoSearch::Architecture, KinoSearch::Doc, KinoSearch::Document::Doc, KinoSearch::Document::HitDoc, KinoSearch::FieldType, KinoSearch::FieldType::BlobType, KinoSearch::FieldType::Float32Type, KinoSearch::FieldType::Float64Type, KinoSearch::FieldType::FullTextType, KinoSearch::FieldType::Int32Type, KinoSearch::FieldType::Int64Type, KinoSearch::FieldType::StringType, KinoSearch::Highlight::HeatMap, KinoSearch::Highlight::Highlighter, KinoSearch::Index::BackgroundMerger, KinoSearch::Index::DataReader, KinoSearch::Index::DataWriter, KinoSearch::Index::DeletionsReader, KinoSearch::Index::DeletionsWriter, KinoSearch::Index::DocReader, KinoSearch::Index::DocVector, KinoSearch::Index::DocWriter, KinoSearch::Index::FilePurger, KinoSearch::Index::HighlightReader, KinoSearch::Index::HighlightWriter, KinoSearch::Index::IndexManager, KinoSearch::Index::IndexReader, KinoSearch::Index::Indexer, KinoSearch::Index::Inverter, KinoSearch::Index::Lexicon, KinoSearch::Index::LexiconReader, KinoSearch::Index::LexiconWriter, KinoSearch::Index::PolyLexicon, KinoSearch::Index::PolyReader, KinoSearch::Index::Posting, KinoSearch::Index::Posting::MatchPosting, KinoSearch::Index::Posting::RichPosting, KinoSearch::Index::Posting::ScorePosting, KinoSearch::Index::PostingList, KinoSearch::Index::PostingListReader, KinoSearch::Index::PostingListWriter, KinoSearch::Index::SegLexicon, KinoSearch::Index::SegPostingList, KinoSearch::Index::SegReader, KinoSearch::Index::SegWriter, KinoSearch::Index::Segment, KinoSearch::Index::Similarity, KinoSearch::Index::Snapshot, KinoSearch::Index::SortCache, KinoSearch::Index::SortReader, KinoSearch::Index::SortWriter, KinoSearch::Index::TermInfo, KinoSearch::Index::TermVector, KinoSearch::Indexer, KinoSearch::Obj::BitVector, KinoSearch::Object::BitVector, KinoSearch::Object::ByteBuf, KinoSearch::Object::CharBuf, KinoSearch::Object::Err, KinoSearch::Object::Hash, KinoSearch::Object::Host, KinoSearch::Object::I32Array, KinoSearch::Object::LockFreeRegistry, KinoSearch::Object::Num, KinoSearch::Object::Obj, KinoSearch::Object::VArray, KinoSearch::Object::VTable, KinoSearch::Plan::Architecture, KinoSearch::Plan::BlobType, KinoSearch::Plan::FieldType, KinoSearch::Plan::Float32Type, KinoSearch::Plan::Float64Type, KinoSearch::Plan::FullTextType, KinoSearch::Plan::Int32Type, KinoSearch::Plan::Int64Type, KinoSearch::Plan::Schema, KinoSearch::Plan::StringType, KinoSearch::QueryParser, KinoSearch::Schema, KinoSearch::Search::ANDQuery, KinoSearch::Search::ANDScorer, KinoSearch::Search::BitVecMatcher, KinoSearch::Search::Collector, KinoSearch::Search::Collector::BitCollector, KinoSearch::Search::Collector::SortCollector, KinoSearch::Search::Compiler, KinoSearch::Search::HitCollector, KinoSearch::Search::HitCollector::BitCollector, KinoSearch::Search::HitQueue, KinoSearch::Search::Hits, KinoSearch::Search::IndexSearcher, KinoSearch::Search::LeafQuery, KinoSearch::Search::MatchAllQuery, KinoSearch::Search::MatchDoc, KinoSearch::Search::Matcher, KinoSearch::Search::NOTQuery, KinoSearch::Search::NOTScorer, KinoSearch::Search::NoMatchQuery, KinoSearch::Search::ORQuery, KinoSearch::Search::ORScorer, KinoSearch::Search::PhraseQuery, KinoSearch::Search::PolyCompiler, KinoSearch::Search::PolyQuery, KinoSearch::Search::PolySearcher, KinoSearch::Search::Query, KinoSearch::Search::QueryParser, KinoSearch::Search::RangeQuery, KinoSearch::Search::RequiredOptionalQuery, KinoSearch::Search::RequiredOptionalScorer, KinoSearch::Search::Searchable, KinoSearch::Search::Searcher, KinoSearch::Search::Similarity, KinoSearch::Search::SortRule, KinoSearch::Search::SortSpec, KinoSearch::Search::Span, KinoSearch::Search::TermQuery, KinoSearch::Search::TopDocs, KinoSearch::Searcher, KinoSearch::Store::FSFileHandle, KinoSearch::Store::FSFolder, KinoSearch::Store::FileHandle, KinoSearch::Store::Folder, KinoSearch::Store::InStream, KinoSearch::Store::Lock, KinoSearch::Store::LockErr, KinoSearch::Store::LockFactory, KinoSearch::Store::OutStream, KinoSearch::Store::RAMFile, KinoSearch::Store::RAMFileHandle, KinoSearch::Store::RAMFolder, KinoSearch::Test, KinoSearch::Test::Util::BBSortEx, KinoSearch::Util::BitVector, KinoSearch::Util::IndexFileNames, KinoSearch::Util::Json, KinoSearch::Util::MemoryPool, KinoSearch::Util::PriorityQueue, KinoSearch::Util::SortExternal, KinoSearch::Util::Stepper, KinoSearch::Util::StringHelper

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

This is not a critical issue. Currently mainly informative for the CPANTS authors. It might be removed later.