diff --git a/scribblings/defs.rkt b/scribblings/defs.rkt
new file mode 100644
index 0000000..9561986
--- /dev/null
+++ b/scribblings/defs.rkt
@@ -0,0 +1,10 @@
+#lang racket/base
+
+(require scribble/base scribble/manual)
+(provide (all-defined-out))
+
+(define (todo . ls)
+  (apply margin-note "TODO" ls))
+
+(define (gtech . x)
+  (apply tech x #:doc '(lib "scribblings/guide/guide.scrbl")))