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

Add =head1 LICENSE and/or the proper text of the well-known license to the main module in your code.

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: PDF::API2, PDF::API2::Annotation, PDF::API2::Basic::PDF::Array, PDF::API2::Basic::PDF::Bool, PDF::API2::Basic::PDF::Dict, PDF::API2::Basic::PDF::File, PDF::API2::Basic::PDF::Filter, PDF::API2::Basic::PDF::Filter::FlateDecode, PDF::API2::Basic::PDF::Filter::LZWDecode, PDF::API2::Basic::PDF::Literal, PDF::API2::Basic::PDF::Name, PDF::API2::Basic::PDF::Null, PDF::API2::Basic::PDF::Number, PDF::API2::Basic::PDF::Page, PDF::API2::Basic::PDF::Pages, PDF::API2::Basic::PDF::String, PDF::API2::Basic::PDF::Utils, PDF::API2::Content, PDF::API2::Lite, PDF::API2::Matrix, PDF::API2::NamedDestination, PDF::API2::Outline, PDF::API2::Page, PDF::API2::Resource, PDF::API2::Resource::BaseFont, PDF::API2::Resource::CIDFont, PDF::API2::Resource::CIDFont::CJKFont, PDF::API2::Resource::CIDFont::TrueType, PDF::API2::Resource::CIDFont::TrueType::FontFile, PDF::API2::Resource::ColorSpace, PDF::API2::Resource::ColorSpace::DeviceN, PDF::API2::Resource::ColorSpace::Indexed, PDF::API2::Resource::ColorSpace::Indexed::ACTFile, PDF::API2::Resource::ColorSpace::Indexed::Hue, PDF::API2::Resource::ColorSpace::Indexed::WebColor, PDF::API2::Resource::ColorSpace::Separation, PDF::API2::Resource::ExtGState, PDF::API2::Resource::Font, PDF::API2::Resource::Font::BdFont, PDF::API2::Resource::Font::CoreFont, PDF::API2::Resource::Font::CoreFont::bankgothic, PDF::API2::Resource::Font::CoreFont::courier, PDF::API2::Resource::Font::CoreFont::courierbold, PDF::API2::Resource::Font::CoreFont::courierboldoblique, PDF::API2::Resource::Font::CoreFont::courieroblique, PDF::API2::Resource::Font::CoreFont::georgia, PDF::API2::Resource::Font::CoreFont::georgiabold, PDF::API2::Resource::Font::CoreFont::georgiabolditalic, PDF::API2::Resource::Font::CoreFont::georgiaitalic, PDF::API2::Resource::Font::CoreFont::helvetica, PDF::API2::Resource::Font::CoreFont::helveticabold, PDF::API2::Resource::Font::CoreFont::helveticaboldoblique, PDF::API2::Resource::Font::CoreFont::helveticaoblique, PDF::API2::Resource::Font::CoreFont::symbol, PDF::API2::Resource::Font::CoreFont::timesbold, PDF::API2::Resource::Font::CoreFont::timesbolditalic, PDF::API2::Resource::Font::CoreFont::timesitalic, PDF::API2::Resource::Font::CoreFont::timesroman, PDF::API2::Resource::Font::CoreFont::trebuchet, PDF::API2::Resource::Font::CoreFont::trebuchetbold, PDF::API2::Resource::Font::CoreFont::trebuchetbolditalic, PDF::API2::Resource::Font::CoreFont::trebuchetitalic, PDF::API2::Resource::Font::CoreFont::verdana, PDF::API2::Resource::Font::CoreFont::verdanabold, PDF::API2::Resource::Font::CoreFont::verdanabolditalic, PDF::API2::Resource::Font::CoreFont::verdanaitalic, PDF::API2::Resource::Font::CoreFont::webdings, PDF::API2::Resource::Font::CoreFont::wingdings, PDF::API2::Resource::Font::CoreFont::zapfdingbats, PDF::API2::Resource::Font::Postscript, PDF::API2::Resource::Font::SynFont, PDF::API2::Resource::Pattern, PDF::API2::Resource::Shading, PDF::API2::Resource::UniFont, PDF::API2::Resource::XObject, PDF::API2::Resource::XObject::Form, PDF::API2::Resource::XObject::Form::BarCode, PDF::API2::Resource::XObject::Form::BarCode::codabar, PDF::API2::Resource::XObject::Form::BarCode::code128, PDF::API2::Resource::XObject::Form::BarCode::code3of9, PDF::API2::Resource::XObject::Form::BarCode::ean13, PDF::API2::Resource::XObject::Form::BarCode::int2of5, PDF::API2::Resource::XObject::Form::Hybrid, PDF::API2::Resource::XObject::Image, PDF::API2::Resource::XObject::Image::GD, PDF::API2::Resource::XObject::Image::GIF, PDF::API2::Resource::XObject::Image::JPEG, PDF::API2::Resource::XObject::Image::PNG, PDF::API2::Resource::XObject::Image::PNM, PDF::API2::Resource::XObject::Image::TIFF, PDF::API2::UniWrap, PDF::API2::Util, PDF::API2::Win32

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.