Data::Fake::CPAN (a PTS 2024 supplement)
One of the things I wrote at the first PTS (back when it was called the Perl QA Hackathon) was Module::Faker. I wrote about it back then (way back in 2008), and again eleven years later. It’s a library that, given a description of a (pretend) CPAN distribution, produces that distribution as an actual file on disk with all the files the dist should have.