Ask HN: Best environment for non-rails front end developer?

What environment would you give a front end designer/developer with no knowledge of Ruby on Rails?

This is assuming that their work will need to be integrated into an existing RoR app.

Would you?

a) set them up with a rails environment and let them write static html in the view files

b) no rails environment but access to git repo, let them right static pages in public folder calling relevant assets

c) completely separate folder with just their html/css/js/img files

d) something else entirely