Looks interesting, but is unfortunately not that useful for projects that include either build artifacts or external dependencies in their repositories. It would be awesome if it utilized some sort of ignore syntax for those.
Edit: We also automatically ignore minified files. If you need a hand with anything please shoot us an email and we can help you out (hello@codeclimate.com)
In the mean time, if you email hello@codeclimate.com we can configure it manually for your OSS repo.