meet the new cop, same as the old cop

extras/prohibit_form_for_and_form_tag.rb

@@ -1,21 +1,25 @@
-module RuboCop
-  module Cop
-    module Style
-      class DisallowFormForandFormTag < Cop
-        MSG = 'Use `.form_with` and remove the `.form_tag` and `.form_for`'.freeze
+require "rails"
 
-        def_node_matcher :form_for_exists?, <<-PATTERN
-          (send _ :form_for ...)
-        PATTERN
+unless Rails.env.production?
+  module RuboCop
+    module Cop
+      module Style
+        class DisallowFormForandFormTag < Cop
+          MSG = 'Use `.form_with` and remove the `.form_tag` and `.form_for`'.freeze
 
-        def_node_matcher :form_tag_exists?, <<-PATTERN
-          (send _ :form_tag ...)
-        PATTERN
+          def_node_matcher :form_for_exists?, <<-PATTERN
+            (send _ :form_for ...)
+          PATTERN
 
-        def on_send(node)
-          return unless form_for_exists?(node) || form_tag_exists?(node)
+          def_node_matcher :form_tag_exists?, <<-PATTERN
+            (send _ :form_tag ...)
+          PATTERN
 
-          add_offense(node)
+          def on_send(node)
+            return unless form_for_exists?(node) || form_tag_exists?(node)
+
+            add_offense(node)
+          end
         end
       end
     end