just redo all of it from scratch

lib/mcp/shared/prompt/argument.rb

@@ -0,0 +1,21 @@
+# typed: strict
+# frozen_string_literal: true
+
+module MCP
+  class Prompt
+    class Argument
+      attr_reader :name, :description, :required, :arguments
+
+      def initialize(name:, description: nil, required: false)
+        @name = name
+        @description = description
+        @required = required
+        @arguments = arguments
+      end
+
+      def to_h
+        { name:, description:, required: }.compact
+      end
+    end
+  end
+end