In 2015 I ran the first CPAN Pull Request Challenge. Each month participants were assigned a randomly selected CPAN distribution, and had a month to submit a pull request. 496 people signed up, and 237 of them completed 768 assignments between them, submitting pull requests on 677 different CPAN distributions. This is a review of how things panned out, what worked well, not so well, and how things have changed for 2016's challenge.
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