I'm interested to try out Gitmate, and I've requested the permission for it to be installed in Python GitHub organization.

Several of its features I'd like to try out for now:

- automatically add size labels on pull requests. It can analyze the content of the pull request, and apply the size labels (xs, s, m, etc)

- apply stale label for inactive pull requsts

gitmate has been used by coala. Here is an example of a PR where it automatically add stale, size labels, and also checks of PEP 8 compliance:

I find the code analysis feature of gitmate (checking for PEP 8 etc) is too noisy, so I don't think we should add it now.

If it works for the devguide or core workflow, perhaps later we can try adding this to cpython too?