instrumentalizer no more global variable

config/initializers/instrumentalizing.rb

@@ -1,5 +1,3 @@
-return if Rails.application.tailwind_watcher?
-
 return unless Rails.application.server?
 
 if Rails.env.development?

lib/live/definable.rb

@@ -1,5 +1,6 @@
 require 'dotenv'
 
+# FIXME: do not use global variable
 $definable_thread_group ||= ThreadGroup.new
 
 module Live

lib/semantic/instrumentalizer.rb

@@ -16,10 +16,14 @@ module Semantic
 
       private
 
-      def global_subscribers = $global_subscribers ||= [] # rubocop:disable Style/GlobalVars
+      def global_subscribers
+        @global_subscribers ||= []
+      end
 
       def reset
-        global_subscribers.each { |sub| ActiveSupport::Notifications.unsubscribe(sub) }
+        global_subscribers.each do |sub|
+          ActiveSupport::Notifications.unsubscribe(sub)
+        end
         global_subscribers.clear
 
         NOTIFICATIONS.each do |event_group, hooks|