easy-going-rails/config/initializers/semantic_logger.rb

RailsSemanticLogger::Rack::Logger.logger.level = :info # useful for remaining log like "[Rack::Log] Started..."
SemanticLogger.clear_appenders!

# Zeitwerk reload message
Rails.autoloaders.main.on_load('ApplicationController') { SemanticLogger[:Zeitwerk].debug('reload!') }

all_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]
}

Rails.configuration.after_initialize do
  all_notifications.each do |event_group, hooks|
    hooks.each { |hook| ActiveSupport::Notifications.unsubscribe("#{hook}.#{event_group}") }
  end

  ActiveSupport::Notifications.subscribe('rolling.live_constant') do |event|
    SemanticLogger[:live_notifications].warn('rolling.live_constant', event.payload) # FIXME: to be continued...
  end
end