diff --git a/app/controllers/strong_controller.rb b/app/controllers/strong_controller.rb
index 36d7682..dfe4537 100644
--- a/app/controllers/strong_controller.rb
+++ b/app/controllers/strong_controller.rb
@@ -1,6 +1,6 @@
 class StrongController < ApplicationController
   def index
-    logger.info(Hot::Constants)
+    logger.info('Live::Constant ')
   end
 
   def update
diff --git a/app/views/hot/index.html.erb b/app/views/hot/index.html.erb
index 633d56b..a9f0de0 100644
--- a/app/views/hot/index.html.erb
+++ b/app/views/hot/index.html.erb
@@ -1,4 +1,4 @@
 <div>
   <h1 class="font-bold text-4xl">Hot#index</h1>
-  <%= Hot::Live %>
+  ssss
 </div>
diff --git a/app/views/scores/index.html.erb b/app/views/scores/index.html.erb
index 8fcdb77..8ceb420 100644
--- a/app/views/scores/index.html.erb
+++ b/app/views/scores/index.html.erb
@@ -2,8 +2,8 @@
   List of Scores
 </h1>
 
-ACTION_CONTROLLER = <%=Live::Constants::ACTION_CONTROLLER%><br/>
 ACTION_VIEW = <%=Live::Constants::ACTION_VIEW%><br/>
+ACTIVE_RECORD = <%=Live::Constants::ACTIVE_RECORD%><br/>
 
 <div class="m-5 flex justify-end">
   <%= link_to "New score", new_score_path, class: "border rounded-lg py-3 px-5 bg-blue-600 text-white block font-medium" %>
diff --git a/config/initializers/instrumentalizing.rb b/config/initializers/instrumentalizing.rb
new file mode 100644
index 0000000..54a0480
--- /dev/null
+++ b/config/initializers/instrumentalizing.rb
@@ -0,0 +1,65 @@
+return if Rails.application.tailwind_watcher?
+
+RailsSemanticLogger::Rack::Logger.logger.level = :info # useful for remaining log like "[Rack::Log] Started..."
+SemanticLogger.clear_appenders!
+
+return unless Rails.application.server?
+
+def build_instrumentation_config
+  {
+    action_controller: true,
+    action_view: Live::Constants::ACTION_VIEW
+    # active_record: Live::Constants::ACTIVE_RECORD
+  }.map do |key, value|
+    key if value
+  end.compact
+end
+
+Rails.autoloaders.main.on_load('ApplicationController') do
+  puts '--- Zeitwerk RELOAD ---'
+  Semantic::Instrumentalizer.activate(*build_instrumentation_config)
+end
+
+Rails.configuration.after_initialize do
+  puts '---- AFTER INITIALIZE ---------'
+  Rails.logger.name = 'rails'
+
+  ActiveSupport::Notifications.subscribe('rolling.live_constant') do |event|
+    puts event.payload[:changes].inspect
+    # TODO: if key includes ACTIVE_RECORD ACTION_VIEW
+    Semantic::Instrumentalizer.activate(*build_instrumentation_config)
+  end
+
+  # im = nil
+  # Rails.autoloaders.main.on_load('ApplicationController') do
+  #   SemanticLogger[:zeitwerk].debug('reload!')
+  #   im = Semantic::InstrumentationManager.new
+  # end
+
+  # Semantic::InstrumentationManager.clear
+
+  #   bootstrap = [{ kind: :restored, constant: 'ACTION_VIEW', type: :boolean, old_value: false, new_value: true },
+  #                { kind: :restored, constant: 'ACTION_CONTROLLER', type: :boolean, old_value: false, new_value: true }]
+  #   im ||= Semantic::InstrumentationManager.new
+  #   im.process(bootstrap)
+end
+
+# RAILS_HOOKS = %i[
+#   action_controller
+#   action_controller_api
+#   action_controller_base
+#   action_dispatch_request
+#   action_dispatch_response
+#   action_view
+#   active_job
+#   active_model
+#   active_record
+#   active_record_fixture_set
+#   after_initialize
+#   after_routes_loaded
+#   before_configuration
+#   before_eager_load
+#   before_initialize
+#   i18n
+#   message_pack
+# ].freeze
diff --git a/config/initializers/monkey_patches.rb b/config/initializers/monkey_patches.rb
index a8cce15..adb197f 100644
--- a/config/initializers/monkey_patches.rb
+++ b/config/initializers/monkey_patches.rb
@@ -8,7 +8,6 @@ def grant(patch)
   end
 end
 
-puts 'MonkeyPatcher runs:'
 patches = Dir.glob(Rails.root.join('lib', 'monkey_patches', '**', '*.rb'))
 patches.each do |file|
   patch = Pathname.new(file).relative_path_from(Rails.root.join('lib', 'monkey_patches')).to_s
diff --git a/config/initializers/semantic_logger.rb b/config/initializers/semantic_logger.rb
deleted file mode 100644
index 2a5b25a..0000000
--- a/config/initializers/semantic_logger.rb
+++ /dev/null
@@ -1,28 +0,0 @@
-return if Rails.application.tailwind_watcher?
-
-RailsSemanticLogger::Rack::Logger.logger.level = :info # useful for remaining log like "[Rack::Log] Started..."
-SemanticLogger.clear_appenders!
-
-im = nil
-# Zeitwerk reload message
-Rails.autoloaders.main.on_load('ApplicationController') do
-  SemanticLogger[:zeitwerk].debug('reload!')
-  im = Semantic::InstrumentationManager.new
-end
-
-Rails.configuration.after_initialize do
-  Rails.logger.name = 'error_trap'
-  Semantic::InstrumentationManager.clear
-
-  bootstrap = [{ kind: :restored, constant: 'ACTION_VIEW', type: :boolean, old_value: false, new_value: true },
-               { kind: :restored, constant: 'ACTION_CONTROLLER', type: :boolean, old_value: false, new_value: true }]
-  im ||= Semantic::InstrumentationManager.new
-  im.process(bootstrap)
-
-  ActiveSupport::Notifications.subscribe('rolling.live_constant') do |event|
-    puts event.payload[:changes].inspect
-    im.process(event.payload[:changes])
-  rescue StandardError => e
-    puts e
-  end
-end
diff --git a/config/puma.rb b/config/puma.rb
index e15db3e..1dea0bb 100644
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -33,3 +33,7 @@ pidfile ENV.fetch('PIDFILE') { 'tmp/pids/server.pid' }
 
 # Allow puma to be restarted by `bin/rails restart` command.
 plugin :tmp_restart
+
+on_booted do
+  puts '********************* PUMA: booted **********************'
+end
diff --git a/lib/live/constants.rb b/lib/live/constants.rb
index eded9fa..833b4cc 100644
--- a/lib/live/constants.rb
+++ b/lib/live/constants.rb
@@ -4,10 +4,10 @@ module Live
     extend Definable
 
     STIMULUS_DEBUG    = boolean false
-    ACTION_VIEW       = boolean true
-    ACTION_CONTROLLER = boolean true
+    ACTION_VIEW       = boolean false
+    ACTIVE_RECORD     = boolean false
 
     MY_INTEGER        = integer 8
-    MY_STRING         = string 'titi'
+    MY_STRING         = string 'tutu'
   end
 end
diff --git a/lib/live/definable.rb b/lib/live/definable.rb
index 631e4bf..6f5f1c6 100644
--- a/lib/live/definable.rb
+++ b/lib/live/definable.rb
@@ -84,7 +84,7 @@ module Live
       value = typed_value(type, raw_value, default)
       definitions[constant] = { type:, default:, value: }
 
-      # logger.debug('new definitions', definitions)
+      puts("-- new definition #{constant}:#{definitions[constant]}")
       value
     end
 
diff --git a/lib/semantic/instrumentalizer.rb b/lib/semantic/instrumentalizer.rb
new file mode 100644
index 0000000..405eb79
--- /dev/null
+++ b/lib/semantic/instrumentalizer.rb
@@ -0,0 +1,50 @@
+module Semantic
+  # enable/disable instrumentation callbacks
+  class Instrumentalizer
+    NOTIFICATIONS = {
+      action_controller: %i[start_processing process_action redirect_to],
+      action_view: %i[render_partial render_template render_collection render_layout],
+      active_record: %i[sql strict_loading instantiation start_transaction transaction]
+    }.freeze
+
+    class << self
+      def activate(*event_groups)
+        reset
+        event_groups.each { |event_group| enable(event_group) }
+      end
+
+      private
+
+      def logger = @logger ||= SemanticLogger[:instrumentation]
+
+      def reset
+        NOTIFICATIONS.each do |event_group, hooks|
+          hooks.each { |hook| ActiveSupport::Notifications.unsubscribe("#{hook}.#{event_group}") }
+        end
+      end
+
+      def enable(event_group)
+        logger.debug { "enabling: #{event_group}" }
+
+        log_subscriber = build_log_subscriber_from(event_group)
+        NOTIFICATIONS[event_group].each do |hook|
+          logger.info("subscribe to #{hook}.#{event_group}")
+          ActiveSupport::Notifications.subscribe("#{hook}.#{event_group}") do |event|
+            # logger.debug("SEND #{log_subscriber} hook=#{hook}")
+            log_subscriber.send(hook, event)
+          end
+        end
+      end
+
+      def build_log_subscriber_from(event_group)
+        classname = event_group.to_s.camelize
+        case classname
+        when 'ActionController'
+          Semantic::Subscribers.const_get(classname).new('toto1')
+        else
+          Semantic::Subscribers.const_get(classname).new
+        end
+      end
+    end
+  end
+end
diff --git a/lib/semantic/instrumentation_manager.rb b/lib/semantic/instrumentation_manager.rb
deleted file mode 100644
index c21e5db..0000000
--- a/lib/semantic/instrumentation_manager.rb
+++ /dev/null
@@ -1,68 +0,0 @@
-module Semantic
-  class InstrumentationManager
-    NOTIFICATIONS = {
-      action_controller: %i[start_processing process_action redirect_to],
-      action_view: %i[render_partial render_template render_collection render_layout],
-      active_record: %i[sql strict_loading instantiation start_transaction transaction]
-    }.freeze
-
-    def logger = @logger ||= SemanticLogger[:instrumentation]
-
-    def initialize
-      logger.debug 're-initialized'
-    end
-
-    def self.clear
-      NOTIFICATIONS.each do |event_group, hooks|
-        hooks.each { |hook| ActiveSupport::Notifications.unsubscribe("#{hook}.#{event_group}") }
-      end
-    end
-
-    def process(changes)
-      logger.info "process called with #{changes.size} change(s)"
-      changes.each do |change|
-        constant = change[:constant]
-        value = change[:new_value]
-        case constant
-        when 'ACTION_VIEW', 'ACTION_CONTROLLER', 'ACTIVE_RECORD'
-          value ? enable(constant) : disable(constant)
-        end
-      end
-      logger.info 'DONE'
-    end
-
-    def enable(constant)
-      logger.info("enable: #{constant}")
-      event_group = constant.underscore.to_sym
-      log_subscriber = build_log_subscriber_from(event_group.to_s.camelize)
-      logger.warn(log_subscriber)
-
-      NOTIFICATIONS[event_group].each do |hook|
-        logger.info("subscribe to #{hook}.#{event_group}")
-        ActiveSupport::Notifications.subscribe("#{hook}.#{event_group}") do |event|
-          # logger.debug("SEND #{log_subscriber} hook=#{hook}")
-          log_subscriber.send(hook, event)
-        end
-      end
-    end
-
-    def disable(constant)
-      logger.info("disable: #{constant}")
-      event_group = constant.underscore.to_sym
-
-      logger.debug(NOTIFICATIONS[event_group].size)
-
-      NOTIFICATIONS[event_group].each do |hook|
-        logger.info("unsubscribe to #{hook}.#{event_group}")
-        ActiveSupport::Notifications.unsubscribe("#{hook}.#{event_group}")
-      end
-    end
-
-    def build_log_subscriber_from(classname)
-      case classname
-      when 'ActionController' then Semantic::Subscribers.const_get(classname).new('toto1')
-      else Semantic::Subscribers.const_get(classname).new
-      end
-    end
-  end
-end