diff --git a/sh/main.sh b/sh/main.sh
index c916049..e85f519 100644
--- a/sh/main.sh
+++ b/sh/main.sh
@@ -16,27 +16,10 @@ RWX_SHELL="$(cat "/proc/${$}/comm")"
 
 RWX_MAIN_PATH="${RWX_ROOT_SYSTEM}/${RWX_MAIN_NAME}"
 
-# ╭──────────╮
-# │ internal │
-# ╰──────────╯
-
-# _RWX_IFS
-
 # ╭─────────╮
 # │ private │
 # ╰─────────╯
 
-rwx_ifs_set() {
-	_RWX_IFS="${IFS}"
-	IFS="
-"
-}
-
-rwx_ifs_unset() {
-	IFS="${_RWX_IFS}"
-	unset RWX_IFS
-}
-
 _rwx_main_log() {
 	if rwx_shell_interactive; then
 		[ ${#} -gt 0 ] || set -- ""
@@ -70,6 +53,10 @@ rwx_shell_interactive() {
 # │ core │
 # ╰──────╯
 
+# ╭──────┬──────╮
+# │ core │ find │
+# ╰──────┴──────╯
+
 # find directory’s files by extension
 rwx_find_extension() {
 	local extension="${1}"
@@ -93,7 +80,26 @@ rwx_find_shell() {
 	rwx_find_extension "sh" "${@}"
 }
 
-rwx_main_source() {
+# ╭──────┬─────╮
+# │ core │ ifs │
+# ╰──────┴─────╯
+
+rwx_ifs_set() {
+	_RWX_IFS="${IFS}"
+	IFS="
+"
+}
+
+rwx_ifs_unset() {
+	IFS="${_RWX_IFS}"
+	unset RWX_IFS
+}
+
+# ╭──────┬────────╮
+# │ core │ source │
+# ╰──────┴────────╯
+
+rwx_source() {
 	local path="${1}"
 	[ -d "${path}" ] ||
 		return 1
@@ -119,19 +125,19 @@ rwx_main_source() {
 	rwx_ifs_unset
 }
 
-# ╭──────╮
-# │ main │
-# ╰──────╯
+# ╭──────┬──────╮
+# │ core │ main │
+# ╰──────┴──────╯
 
 # run initial steps
 rwx_main() {
 	# system root
-	if ! rwx_main_source "${RWX_ROOT_SYSTEM}"; then
+	if ! rwx_source "${RWX_ROOT_SYSTEM}"; then
 		_rwx_main_log "Not a directory: ${RWX_ROOT_SYSTEM}"
 		return 1
 	fi
 	# user root
-	rwx_main_source "${RWX_ROOT_USER}"
+	rwx_source "${RWX_ROOT_USER}"
 	# run interactive extras
 	if rwx_shell_interactive; then
 		# check format