diff --git a/common-lisp/main.lisp b/common-lisp/main.lisp
new file mode 100644
index 000000000..2c4a5a411
--- /dev/null
+++ b/common-lisp/main.lisp
@@ -0,0 +1,15 @@
+(in-package #:cl-user)
+(defpackage #:utils
+  (:documentation "Some utility functions and macros to wet my beak.")
+  (:use #:cl)
+  (:shadow #:type))
+(in-package #:utils)
+
+(defmacro type (name in out)
+  `(declaim (ftype (function ,in ,out) ,name)))
+
+(defmacro comment (&rest _forms) nil)
+
+(type add (int int) int)
+(defun add (a b)
+  (+ a b))