Hi all, A while ago I updated case #1450 with a note that routes are only loaded from engines, not from vanilla plugins. https://rails.lighthouseapp.com/projects/8994/tickets/1450-add-way-for-plugins-to-map-routes But apparently, it''s impossible to reopen a closed case, so, understandably it never got looked at. Here''s what I posted, reshuffled: Looks like f2ee056 regressed 3cc9d1c. That is, plugins can''t have routes anymore, but engines do. routing_files was replaced by add_engine_routing_configurations, which again uses #engines instead of #plugins. Referenced commits: f2ee056 Added view path support for engines [DHH] 3cc9d1c Let all plugins not just engines have a config/routes.rb file http://github.com/rails/rails/commit/f2ee056873b84f8917e72d87181e1a9f5f653342 http://github.com/rails/rails/commit/3cc9d1c5ad1639283b43ee2b6099cb4f3b19bf23