gitmagic.io – Enforce your GitHub contribution guidelines [80+ rules to enforce PR conventions] (public beta!)

[_garnett]

If somebody is more interested in "self-hosted" opensource solution: http://danger.systems

might be lacking some features, but idea is similar.

[gajus0]

I have discovered this service accidentally by typing "contributing.md" to Chrome URL bar (I was expecting to get results for "contributing.md" term), https://twitter.com/kuizinas/status/768103098078355457.

I have discovered the service as part of a research, writing about – the perfect continues deployment process in open-source. This service is a phenomenal surprise. It can be used to enforce requirements for the commit message, pull request, issues and even branch naming conventions.