Copy over the plugins

_plugins/last_modified_at_generator.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+require 'fileutils'
+require 'pathname'
+require 'jekyll-last-modified-at'
+
+module Recents
+  # Generate change information for all markdown pages
+  class Generator < Jekyll::Generator
+    def generate(site)
+      items = site.collections['notes'].docs
+      items.each do |page|
+        timestamp = Jekyll::LastModifiedAt::Determinator.new(site.source, page.path, '%FT%T%:z').to_s
+        page.data['last_modified_at_timestamp'] = timestamp
+      end
+    end
+  end
+end