diff --git a/sh/alias/shell.sh b/sh/alias/shell.sh
deleted file mode 100644
index d6f5801..0000000
--- a/sh/alias/shell.sh
+++ /dev/null
@@ -1,29 +0,0 @@
-# shorten alias
-a() {
-	alias \
-		"${@}"
-}
-
-# swap directory (current ↔ previous)
-sd() {
-	cd \
-		- ||
-		return
-}
-
-# exit terminal
-x() {
-	exit \
-		"${@}"
-}
-
-[ "${RWX_SHELL}" = "bash" ] || return
-
-# shellcheck disable=SC3033
-..() {
-	cd ..
-}
-# shellcheck disable=SC3033
-...() {
-	cd ../..
-}
diff --git a/sh/main.sh b/sh/main.sh
index d96d776..16ce907 100755
--- a/sh/main.sh
+++ b/sh/main.sh
@@ -26,17 +26,6 @@ RWX_SELF_NAME="rwx"
 # │ main │ variables │
 # ╰──────┴───────────╯
 
-RWX_COMMAND_ARGUMENT="${0}"
-# currently running shell name
-RWX_SHELL="$(cat "/proc/${$}/comm")"
-
-# command name used to run
-# (stripped from hyphen interactive flag)
-RWX_COMMAND_NAME="$(basename "${RWX_COMMAND_ARGUMENT}" | sed "s|^-||")"
-case "${RWX_COMMAND_NAME}" in
-"bash" | "dash" | "sh") unset RWX_COMMAND_NAME ;;
-*) ;;
-esac
 # system root directory of the project
 RWX_ROOT_SYSTEM="/usr/local/lib/${RWX_SELF_NAME}"
 # user root directory of the project
@@ -63,9 +52,18 @@ rwx_main() {
 	# load code cache
 	rwx_code_load
 	# context / command
-	if [ -n "${RWX_COMMAND_NAME}" ]; then
+	local command
+	# command name used to run
+	# (stripped from hyphen interactive flag)
+	command="$(basename "${0}" | sed "s|^-||")"
+	case "${command}" in
+	"bash" | "dash" | "sh") unset command ;;
+	*) ;;
+	esac
+	if [ -n "${command}" ]; then
 		local function
-		function="$(rwx_code_alias_function "${RWX_COMMAND_NAME}")"
+		# find the matching function
+		function="$(rwx_code_alias_function "${command}")"
 		if [ -n "${function}" ]; then
 			"${function}" "${@}"
 		fi
diff --git a/sh/shell.sh b/sh/shell.sh
index 7e56658..8400fd2 100644
--- a/sh/shell.sh
+++ b/sh/shell.sh
@@ -1,3 +1,7 @@
+# ╭───────╮
+# │ shell │
+# ╰───────╯
+
 _rwx_shell_color() {
 	local code="${1}"
 	case "${RWX_SHELL}" in
@@ -19,6 +23,11 @@ _rwx_shell_color() {
 		;;
 	esac
 }
+
+# ╭───────┬───────────╮
+# │ shell │ constants │
+# ╰───────┴───────────╯
+
 RWX_COLOR_BROWN="$(_rwx_shell_color 33)"
 RWX_COLOR_CYAN="$(_rwx_shell_color 36)"
 RWX_COLOR_DEFAULT="$(_rwx_shell_color)"
@@ -26,6 +35,17 @@ RWX_COLOR_GREEN="$(_rwx_shell_color 31)"
 RWX_COLOR_MAGENTA="$(_rwx_shell_color 35)"
 RWX_COLOR_RED="$(_rwx_shell_color 32)"
 
+# ╭───────┬───────────╮
+# │ shell │ variables │
+# ╰───────┴───────────╯
+
+# currently running shell name
+RWX_SHELL="$(cat "/proc/${$}/comm")"
+
+# ╭───────┬───────────╮
+# │ shell │ functions │
+# ╰───────┴───────────╯
+
 rwx_shell_configure() {
 	[ -n "${ENV}" ] || ENV="${RWX_MAIN_PATH}"
 	export ENV
@@ -114,3 +134,37 @@ rwx_shell_prompt() {
 	# print
 	printf "%b" "${view}"
 }
+
+# ╭───────┬───────────╮
+# │ shell │ shortcuts │
+# ╰───────┴───────────╯
+
+# shorten alias
+a() {
+	alias \
+		"${@}"
+}
+
+# swap directory (current ↔ previous)
+sd() {
+	cd \
+		- ||
+		return
+}
+
+# exit terminal
+x() {
+	exit \
+		"${@}"
+}
+
+[ "${RWX_SHELL}" = "bash" ] || return
+
+# shellcheck disable=SC3033
+..() {
+	cd ..
+}
+# shellcheck disable=SC3033
+...() {
+	cd ../..
+}