diff --git a/sh/log/log.sh b/sh/log.sh
similarity index 100%
rename from sh/log/log.sh
rename to sh/log.sh
diff --git a/sh/log/step.sh b/sh/log/step.sh
deleted file mode 100644
index 34a5c64..0000000
--- a/sh/log/step.sh
+++ /dev/null
@@ -1,25 +0,0 @@
-# ╭───────────────╮
-# │ __ = internal │
-# ╰───────────────╯
-
-# __RWX_BAR_TOP
-# __RWX_BAR_MIDDLE
-# __RWX_BAR_BOTTOM
-
-# __RWX_STEP_LEVEL
-# __RWX_STEP_level_INDEX
-# __RWX_STEP_level_LABEL
-
-# ╭─────────────╮
-# │ _ = private │
-# ╰─────────────╯
-
-_RWX_BOX_DOWN_AND_HORIZONTAL="┬"
-_RWX_BOX_DOWN_AND_LEFT="╮"
-_RWX_BOX_DOWN_AND_RIGHT="╭"
-_RWX_BOX_HORIZONTAL="─"
-_RWX_BOX_LEFT="╴"
-_RWX_BOX_UP_AND_HORIZONTAL="┴"
-_RWX_BOX_UP_AND_LEFT="╯"
-_RWX_BOX_UP_AND_RIGHT="╰"
-_RWX_BOX_VERTICAL="│"
diff --git a/sh/main.sh b/sh/main.sh
index 802418f..2d729f3 100755
--- a/sh/main.sh
+++ b/sh/main.sh
@@ -1,35 +1,27 @@
 #! /usr/bin/env sh
 
-# ╭──────┬───────────╮
-# │ main │ constants │
-# ╰──────┴───────────╯
+# ╭───────────╮
+# │ constants │
+# ╰───────────╯
 
 RWX_MAIN_NAME="main.sh"
 RWX_SELF_NAME="rwx"
 
 RWX_SELF_COMMAND="_${RWX_SELF_NAME}_cmd_"
 
-# ╭──────┬───────────╮
-# │ main │ variables │
-# ╰──────┴───────────╯
+# ╭───────────╮
+# │ variables │
+# ╰───────────╯
 
-RWX_COMMAND_ARGUMENT="${0}"
-RWX_SHELL="$(cat "/proc/${$}/comm")"
-
-RWX_COMMAND_NAME="$(basename "${RWX_COMMAND_ARGUMENT}" |
-	sed "s|^-||")"
-case "${RWX_COMMAND_NAME}" in
-"bash" | "dash" | "sh") unset RWX_COMMAND_NAME ;;
-*) ;;
-esac
 RWX_ROOT_SYSTEM="/usr/local/lib/${RWX_SELF_NAME}"
 RWX_SELF_USER="${HOME}/${RWX_SELF_NAME}"
+RWX_SHELL="$(cat "/proc/${$}/comm")"
 
 RWX_MAIN_PATH="${RWX_ROOT_SYSTEM}/${RWX_MAIN_NAME}"
 
-# ╭──────┬───────╮
-# │ main │ shell │
-# ╰──────┴───────╯
+# ╭──────╮
+# │ core │
+# ╰──────╯
 
 # test if active shell is in interactive mode
 rwx_shell_interactive() {
@@ -40,7 +32,7 @@ rwx_shell_interactive() {
 }
 
 # ╭──────┬─────╮
-# │ main │ log │
+# │ core │ log │
 # ╰──────┴─────╯
 
 __rwx_log() {
@@ -54,7 +46,7 @@ __rwx_log() {
 }
 
 # ╭──────┬──────╮
-# │ main │ find │
+# │ core │ find │
 # ╰──────┴──────╯
 
 # find directory’s files by extension
@@ -81,7 +73,7 @@ rwx_find_shell() {
 }
 
 # ╭──────┬─────╮
-# │ main │ ifs │
+# │ core │ ifs │
 # ╰──────┴─────╯
 
 rwx_ifs_set() {
@@ -96,19 +88,20 @@ rwx_ifs_unset() {
 }
 
 # ╭──────┬────────╮
-# │ main │ source │
+# │ core │ source │
 # ╰──────┴────────╯
 
 rwx_source() {
 	local path="${1}"
 	[ -d "${path}" ] ||
 		return 1
-	local count module
+	local count module modules
+	modules="$(rwx_find_shell "${path}" "${RWX_MAIN_NAME}")"
+	rwx_ifs_set
 	count=0
 	__rwx_log "" \
 		". ${path}"
-	rwx_ifs_set
-	for module in $(rwx_find_shell "${path}" "${RWX_MAIN_NAME}"); do
+	for module in ${modules}; do
 		count=$((count + 1))
 		__rwx_log "$(printf "%02d" "${count}") ${module%.sh}"
 		module="${path}/${module}"
@@ -118,9 +111,9 @@ rwx_source() {
 	rwx_ifs_unset
 }
 
-# ╭──────╮
-# │ main │
-# ╰──────╯
+# ╭──────┬──────╮
+# │ core │ main │
+# ╰──────┴──────╯
 
 # run initial steps
 rwx_main() {
@@ -131,13 +124,33 @@ rwx_main() {
 	fi
 	# user root
 	rwx_source "${RWX_SELF_USER}"
-	# context / command
-	if [ -n "${RWX_COMMAND_NAME}" ]; then
-		"${RWX_SELF_COMMAND}${RWX_COMMAND_NAME}" "${@}"
-	# context / shell
-	else
-		rwx_self_init
-	fi
+	#
+	local argument
+	argument="$(echo "${0}" | sed "s|^-||")"
+	case "${argument}" in
+	"bash" | \
+		"dash" | \
+		"sh")
+		# run interactive extras
+		if rwx_shell_interactive; then
+			# check format
+			rwx_log
+			rwx_shfmt "${RWX_ROOT_SYSTEM}"
+			# check syntax
+			rwx_log
+			rwx_shellcheck "${RWX_ROOT_SYSTEM}"
+			# help
+			rwx_log
+			rwx_self_help
+		fi
+		;;
+	*)
+		local function name
+		name="$(basename "${argument}")"
+		function="${RWX_SELF_COMMAND}${name}"
+		"${function}" "${@}"
+		;;
+	esac
 }
 
 # run main function
diff --git a/sh/self.sh b/sh/self.sh
index c6fad3b..41a2a0c 100644
--- a/sh/self.sh
+++ b/sh/self.sh
@@ -1,7 +1,3 @@
-# ╭──────┬──────────╮
-# │ self │ commands │
-# ╰──────┴──────────╯
-
 # get commands from root
 rwx_self_commands() {
 	grep \
@@ -12,10 +8,6 @@ rwx_self_commands() {
 		sed "s|^${RWX_SELF_COMMAND}||"
 }
 
-# ╭──────┬───────────╮
-# │ self │ functions │
-# ╰──────┴───────────╯
-
 # get functions from root
 rwx_self_functions() {
 	grep \
@@ -25,10 +17,6 @@ rwx_self_functions() {
 		cut --delimiter "(" --fields 1
 }
 
-# ╭──────┬──────╮
-# │ self │ help │
-# ╰──────┴──────╯
-
 # output help message
 rwx_self_help() {
 	rwx_log \
@@ -37,29 +25,6 @@ rwx_self_help() {
 		" u__… = user"
 }
 
-# ╭──────┬──────╮
-# │ self │ init │
-# ╰──────┴──────╯
-
-rwx_self_init() {
-	# run interactive extras
-	if rwx_shell_interactive; then
-		# check format
-		rwx_log
-		rwx_shfmt "${RWX_ROOT_SYSTEM}"
-		# check syntax
-		rwx_log
-		rwx_shellcheck "${RWX_ROOT_SYSTEM}"
-		# help
-		rwx_log
-		rwx_self_help
-	fi
-}
-
-# ╭──────┬─────────╮
-# │ self │ install │
-# ╰──────┴─────────╯
-
 _rwx_cmd_rwx_install() { rwx_self_install "${@}"; }
 rwx_self_install() {
 	local target="${1}"
@@ -81,10 +46,6 @@ rwx_self_install() {
 	rwx_link "${file}" "${RWX_MAIN_PATH}"
 }
 
-# ╭──────┬────────╮
-# │ self │ subset │
-# ╰──────┴────────╯
-
 rwx_self_subset() {
 	local argument path
 	for argument in "${@}"; do
@@ -100,10 +61,6 @@ rwx_self_subset() {
 	done
 }
 
-# ╭──────┬───────╮
-# │ self │ write │
-# ╰──────┴───────╯
-
 rwx_self_write() {
 	local target="${1}"
 	if [ -n "${target}" ]; then