I see most of the developers use WP-CLI but none of them seems active for contributing in it. So far I have seen only @danielbachhuber and @schlessera actively contributing in WP-CLI project. everyone can see their work.
Even though I am not experienced developer but started helping them with the baby steps and I think every other new developer or experience one should give their time for such a helpful development tool.
My First Contribution in WP-CLI: