Today while pairing with two colleagues I noticed that our Code Climate maintainability score and test score was showing on the Github pull request pages. Also, any code quality issues are shown inline which makes it really helpful when doing code reviews. Checkout the extension here:

https://chrome.google.com/webstore/detail/code-climate/phgahogocbnfilkegjdpohgkkjgahjgk?hl=en

Hope this helps someone :)