diff --git a/sh/alias/shell.sh b/sh/alias/shell.sh
new file mode 100644
index 0000000..f216c92
--- /dev/null
+++ b/sh/alias/shell.sh
@@ -0,0 +1,18 @@
+# shorten alias
+a() {
+	alias \
+		"${@}"
+}
+
+# swap directory (current ↔ previous)
+sd() {
+	cd \
+		- ||
+		return
+}
+
+# exit terminal
+x() {
+	exit \
+		"${@}"
+}
diff --git a/sh/code.awk b/sh/code.awk
index fba6da4..0d23127 100644
--- a/sh/code.awk
+++ b/sh/code.awk
@@ -32,7 +32,6 @@ BEGIN {
 
     RE_ALIAS = RE_BEGIN "#=" RE_SPACES RE_VAR RE_END
     RE_CLOSE = RE_BEGIN "}" RE_SPACES RE_END
-    RE_COMMAND = RE_BEGIN "#/" RE_SPACES RE_VAR RE_END
     RE_CONSTANT = RE_BEGIN RE_CONST RE_SET RE_END
     RE_DOC = RE_BEGIN RE_SPACES "#" RE_SPACE RE_ANY RE_END
     RE_FUNCTION = RE_BEGIN RE_VAR RE_FUNC RE_END
@@ -41,7 +40,6 @@ BEGIN {
     RE_VARIABLE = RE_BEGIN RE_VAR RE_SET RE_END
 
     alias = 0
-    command = 0
     f = ""
     reset()
     module = 0
@@ -52,10 +50,6 @@ BEGIN {
         if (match($0, RE_ALIAS, m)) {
             print m[1]
         }
-    } else if (action == "commands") {
-        if (match($0, RE_COMMAND, m)) {
-            print m[1]
-        }
     } else if (action == "constants") {
         if (match($0, RE_CONSTANT, m)) {
             print m[1]
@@ -95,11 +89,6 @@ BEGIN {
             if (m[1] == target) {
                 alias = 1
             }
-        } else if (match($0, RE_COMMAND, m)) {
-            append("/ " m[1])
-            if (m[1] == target) {
-                command = 1
-            }
         # set
         } else if (match($0, RE_CONSTANT, m)) {
             if (m[1] == target) {
@@ -125,9 +114,6 @@ BEGIN {
             if (alias) {
                 print "= " target
                 output(f, "function")
-            } else if (command) {
-                print "/ " target
-                output(f, "function")
             } else if (f == target) {
                 output(f, "function")
             } else {
diff --git a/sh/code.sh b/sh/code.sh
index de4b331..76487b9 100644
--- a/sh/code.sh
+++ b/sh/code.sh
@@ -12,8 +12,6 @@ _rwx_code_awk="$(cat "${RWX_ROOT_SYSTEM}/code.awk")"
 _rwx_code_aliases=""
 # cache for code aliases functions
 _rwx_code_aliases_functions=""
-# cache for code commands
-_rwx_code_commands=""
 # cache for code constants
 _rwx_code_constants=""
 # cache for code functions
@@ -25,7 +23,7 @@ _rwx_code_variables=""
 # │ code │ install │
 # ╰──────┴─────────╯
 
-#/ rwx_install
+#= rwx_install
 rwx_code_install() {
 	local target="${1}"
 	local command file name root
@@ -46,7 +44,7 @@ rwx_code_install() {
 		rwx_remove "${file}"
 		rwx_link "${file}" "${name}"
 	done <<EOF
-${_rwx_code_commands}
+${_rwx_code_aliases}
 EOF
 	# sh
 	file="${target}/etc/profile.d/${RWX_SELF_NAME}.sh"
@@ -102,11 +100,6 @@ rwx_code_aliases_functions() {
 	echo "${_rwx_code_aliases_functions}"
 }
 
-# show the cached commands
-rwx_code_commands() {
-	echo "${_rwx_code_commands}"
-}
-
 # show the cached constants
 #= rcc
 rwx_code_constants() {
@@ -164,8 +157,6 @@ rwx_code_load() {
 	done <<EOF
 ${_rwx_code_aliases_functions}
 EOF
-	# parse commands
-	_rwx_code_commands="$(rwx_code_parse "commands")"
 	# parse constants
 	_rwx_code_constants="$(rwx_code_parse "constants")"
 	# parse functions
diff --git a/sh/main.sh b/sh/main.sh
index 62a5bfc..470cf72 100755
--- a/sh/main.sh
+++ b/sh/main.sh
@@ -26,8 +26,8 @@ RWX_SELF_NAME="rwx"
 # │ main │ variables │
 # ╰──────┴───────────╯
 
-# cache of all sourced code modules
-_rwx_code=""
+# currently running shell name
+RWX_SHELL="$(cat "/proc/${$}/comm")"
 
 # system root directory of the project
 RWX_ROOT_SYSTEM="/usr/local/lib/${RWX_SELF_NAME}"
@@ -37,109 +37,6 @@ RWX_SELF_USER="${HOME}/${RWX_SELF_NAME}"
 # path to the entrypoint main file of the project
 RWX_MAIN_PATH="${RWX_ROOT_SYSTEM}/${RWX_MAIN_NAME}"
 
-# ╭──────┬──────╮
-# │ main │ find │
-# ╰──────┴──────╯
-
-# find directory’s files by extension
-#> find
-#> sort
-rwx_find_extension() {
-	local extension="${1}"
-	local root="${2}"
-	local file="${3}"
-	set -- \
-		"${root}" \
-		-name "*.${extension}" \
-		-type "f"
-	[ -n "${file}" ] &&
-		set -- "${@}" \
-			-not \
-			-name "${file}"
-	find "${@}" \
-		-printf "%P\n" |
-		sort
-}
-
-# find directory’s sh files
-rwx_find_shell() {
-	rwx_find_extension "sh" "${@}"
-}
-
-# ╭──────┬───────╮
-# │ main │ shell │
-# ╰──────┴───────╯
-
-# test if active shell is in interactive mode
-rwx_shell_interactive() {
-	case "${-}" in
-	*i*) ;;
-	*) return 1 ;;
-	esac
-}
-
-# ╭──────┬─────╮
-# │ main │ log │
-# ╰──────┴─────╯
-
-__rwx_log() {
-	if rwx_shell_interactive; then
-		[ ${#} -gt 0 ] || set -- ""
-		local line
-		for line in "${@}"; do
-			echo "${line}"
-		done
-	fi
-}
-
-# ╭──────┬────────╮
-# │ main │ source │
-# ╰──────┴────────╯
-
-# source code from file path
-rwx_source() {
-	local root="${1}"
-	[ -d "${root}" ] ||
-		return 1
-	local file="${2}"
-	local count module modules
-	count=0
-	__rwx_log "" \
-		". ${root}"
-	modules="$(rwx_find_shell "${root}" "${file}")"
-	while IFS= read -r module; do
-		count=$((count + 1))
-		__rwx_log "$(printf "%02d" "${count}") ${module%.sh}"
-		# shellcheck disable=SC1090
-		. "${root}/${module}"
-		# cache code
-		rwx_cache "${root}" "${module}"
-	done <<EOF
-${modules}
-EOF
-}
-
-# ╭──────┬───────╮
-# │ main │ cache │
-# ╰──────┴───────╯
-
-# cache source code of a module
-# inside a global code variable
-#> cat
-rwx_cache() {
-	local root="${1}"
-	local module="${2}"
-	local name="${module%.sh}"
-	local path="${root}/${module}"
-	local text
-	text="$(cat "${path}")"
-	# all source code
-	_rwx_code="${_rwx_code}\
-#. ${name}
-${text}
-"
-}
-
 # ╭──────┬──────╮
 # │ main │ main │
 # ╰──────┴──────╯
@@ -179,6 +76,109 @@ rwx_main() {
 	fi
 }
 
+# ╭──────┬───────╮
+# │ main │ cache │
+# ╰──────┴───────╯
+
+# cache of all sourced code modules
+_rwx_code=""
+
+# cache source code of a module
+# inside a global code variable
+rwx_cache() {
+	local root="${1}"
+	local module="${2}"
+	local name="${module%.sh}"
+	local path="${root}/${module}"
+	local text
+	text="$(cat "${path}")"
+	# all source code
+	_rwx_code="${_rwx_code}\
+#. ${name}
+${text}
+"
+}
+
+# ╭──────┬────────╮
+# │ main │ source │
+# ╰──────┴────────╯
+
+# source code from file path
+rwx_source() {
+	local root="${1}"
+	[ -d "${root}" ] ||
+		return 1
+	local file="${2}"
+	local count module modules
+	count=0
+	__rwx_log "" \
+		". ${root}"
+	modules="$(rwx_find_shell "${root}" "${file}")"
+	while IFS= read -r module; do
+		count=$((count + 1))
+		__rwx_log "$(printf "%02d" "${count}") ${module%.sh}"
+		# shellcheck disable=SC1090
+		. "${root}/${module}"
+		# cache code
+		rwx_cache "${root}" "${module}"
+	done <<EOF
+${modules}
+EOF
+}
+
+# ╭──────┬─────╮
+# │ main │ log │
+# ╰──────┴─────╯
+
+__rwx_log() {
+	if rwx_shell_interactive; then
+		[ ${#} -gt 0 ] || set -- ""
+		local line
+		for line in "${@}"; do
+			echo "${line}"
+		done
+	fi
+}
+
+# ╭──────┬───────╮
+# │ main │ shell │
+# ╰──────┴───────╯
+
+# test if active shell is in interactive mode
+rwx_shell_interactive() {
+	case "${-}" in
+	*i*) ;;
+	*) return 1 ;;
+	esac
+}
+
+# ╭──────┬──────╮
+# │ main │ find │
+# ╰──────┴──────╯
+
+# find directory’s files by extension
+rwx_find_extension() {
+	local extension="${1}"
+	local root="${2}"
+	local file="${3}"
+	set -- \
+		"${root}" \
+		-name "*.${extension}" \
+		-type "f"
+	[ -n "${file}" ] &&
+		set -- "${@}" \
+			-not \
+			-name "${file}"
+	find "${@}" \
+		-printf "%P\n" |
+		sort
+}
+
+# find directory’s sh files
+rwx_find_shell() {
+	rwx_find_extension "sh" "${@}"
+}
+
 # ╭──────┬─────╮
 # │ main │ run │
 # ╰──────┴─────╯
diff --git a/sh/shell/0.sh b/sh/shell/0.sh
index ed847cb..6a28c31 100644
--- a/sh/shell/0.sh
+++ b/sh/shell/0.sh
@@ -2,9 +2,6 @@
 # │ shell │
 # ╰───────╯
 
-# currently running shell name
-RWX_SHELL="$(cat "/proc/${$}/comm")"
-
 _rwx_shell_color() {
 	local code="${1}"
 	case "${RWX_SHELL}" in
@@ -130,32 +127,6 @@ rwx_shell_prompt() {
 	printf "%b" "${view}"
 }
 
-# ╭───────┬───────────╮
-# │ shell │ shortcuts │
-# ╰───────┴───────────╯
-
-# shorten alias
-#= a
-rwx_shell_alias() {
-	alias \
-		"${@}"
-}
-
-# swap directory (current ↔ previous)
-#= sd
-rwx_shell_swap_directory() {
-	cd \
-		- ||
-		return
-}
-
-# exit terminal
-#= x
-rwx_shell_exit() {
-	exit \
-		"${@}"
-}
-
 # ╭───────┬──────╮
 # │ shell │ main │
 # ╰───────┴──────╯
diff --git a/sh/test.sh b/sh/test.sh
index ad17c22..4f4a557 100644
--- a/sh/test.sh
+++ b/sh/test.sh
@@ -21,8 +21,7 @@ rwx_test_code() {
 		"variables" \
 		"functions" \
 		"aliases" \
-		"aliases_functions" \
-		"commands"
+		"aliases_functions"
 	rwx_code
 	for items in "${@}"; do
 		echo
@@ -47,9 +46,7 @@ rwx_test_doc() {
 		"rwx_cache" \
 		\
 		"alias/batcat" \
-		"b" \
-		\
-		"rwx_install"
+		"b"
 	for item in "${@}"; do
 		echo
 		rwx_code_doc "${item}"