diff --git a/sh/main.sh b/sh/main.sh
index 8e76ad4..321d1dc 100755
--- a/sh/main.sh
+++ b/sh/main.sh
@@ -63,8 +63,6 @@ rwx_main() {
 # │ main │ cache │
 # ╰──────┴───────╯
 
-RWX_CODE=""
-
 # cache source code of a module
 rwx_cache() {
 	local root="${1}"
@@ -73,6 +71,7 @@ rwx_cache() {
 	local path="${root}/${module}"
 	local text
 	text="$(cat "${path}")"
+	# all source code
 	RWX_CODE="${RWX_CODE}\
 #↓ ${name}
 ${text}