diff --git a/lib/asciidoctor/custom_extensions/chat_block_processor.rb b/lib/asciidoctor/custom_extensions/chat_block_processor.rb
new file mode 100644
index 0000000..558be81
--- /dev/null
+++ b/lib/asciidoctor/custom_extensions/chat_block_processor.rb
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+class ChatBlock < Asciidoctor::Extensions::BlockProcessor
+  use_dsl
+
+  named :chat
+  on_context :example
+  name_positional_attributes 'avatar', 'state'
+  default_attributes 'state' => 'default', 'avatarstype' => 'webp'
+
+  # TODO: Create the output.
+  def process(parent, reader, attrs)
+  end
+end