diff --git a/sh/log.sh b/sh/log/log.sh
similarity index 100%
rename from sh/log.sh
rename to sh/log/log.sh
diff --git a/sh/log/step.sh b/sh/log/step.sh
new file mode 100644
index 0000000..34a5c64
--- /dev/null
+++ b/sh/log/step.sh
@@ -0,0 +1,25 @@
+# ╭───────────────╮
+# │ __ = 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 2d729f3..802418f 100755
--- a/sh/main.sh
+++ b/sh/main.sh
@@ -1,27 +1,35 @@
 #! /usr/bin/env sh
 
-# ╭───────────╮
-# │ constants │
-# ╰───────────╯
+# ╭──────┬───────────╮
+# │ main │ constants │
+# ╰──────┴───────────╯
 
 RWX_MAIN_NAME="main.sh"
 RWX_SELF_NAME="rwx"
 
 RWX_SELF_COMMAND="_${RWX_SELF_NAME}_cmd_"
 
-# ╭───────────╮
-# │ variables │
-# ╰───────────╯
+# ╭──────┬───────────╮
+# │ main │ 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}"
 
-# ╭──────╮
-# │ core │
-# ╰──────╯
+# ╭──────┬───────╮
+# │ main │ shell │
+# ╰──────┴───────╯
 
 # test if active shell is in interactive mode
 rwx_shell_interactive() {
@@ -32,7 +40,7 @@ rwx_shell_interactive() {
 }
 
 # ╭──────┬─────╮
-# │ core │ log │
+# │ main │ log │
 # ╰──────┴─────╯
 
 __rwx_log() {
@@ -46,7 +54,7 @@ __rwx_log() {
 }
 
 # ╭──────┬──────╮
-# │ core │ find │
+# │ main │ find │
 # ╰──────┴──────╯
 
 # find directory’s files by extension
@@ -73,7 +81,7 @@ rwx_find_shell() {
 }
 
 # ╭──────┬─────╮
-# │ core │ ifs │
+# │ main │ ifs │
 # ╰──────┴─────╯
 
 rwx_ifs_set() {
@@ -88,20 +96,19 @@ rwx_ifs_unset() {
 }
 
 # ╭──────┬────────╮
-# │ core │ source │
+# │ main │ source │
 # ╰──────┴────────╯
 
 rwx_source() {
 	local path="${1}"
 	[ -d "${path}" ] ||
 		return 1
-	local count module modules
-	modules="$(rwx_find_shell "${path}" "${RWX_MAIN_NAME}")"
-	rwx_ifs_set
+	local count module
 	count=0
 	__rwx_log "" \
 		". ${path}"
-	for module in ${modules}; do
+	rwx_ifs_set
+	for module in $(rwx_find_shell "${path}" "${RWX_MAIN_NAME}"); do
 		count=$((count + 1))
 		__rwx_log "$(printf "%02d" "${count}") ${module%.sh}"
 		module="${path}/${module}"
@@ -111,9 +118,9 @@ rwx_source() {
 	rwx_ifs_unset
 }
 
-# ╭──────┬──────╮
-# │ core │ main │
-# ╰──────┴──────╯
+# ╭──────╮
+# │ main │
+# ╰──────╯
 
 # run initial steps
 rwx_main() {
@@ -124,33 +131,13 @@ rwx_main() {
 	fi
 	# user root
 	rwx_source "${RWX_SELF_USER}"
-	#
-	local argument
-	argument="$(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
+	# context / command
+	if [ -n "${RWX_COMMAND_NAME}" ]; then
+		"${RWX_SELF_COMMAND}${RWX_COMMAND_NAME}" "${@}"
+	# context / shell
+	else
+		rwx_self_init
+	fi
 }
 
 # run main function
diff --git a/sh/self.sh b/sh/self.sh
index 41a2a0c..c6fad3b 100644
--- a/sh/self.sh
+++ b/sh/self.sh
@@ -1,3 +1,7 @@
+# ╭──────┬──────────╮
+# │ self │ commands │
+# ╰──────┴──────────╯
+
 # get commands from root
 rwx_self_commands() {
 	grep \
@@ -8,6 +12,10 @@ rwx_self_commands() {
 		sed "s|^${RWX_SELF_COMMAND}||"
 }
 
+# ╭──────┬───────────╮
+# │ self │ functions │
+# ╰──────┴───────────╯
+
 # get functions from root
 rwx_self_functions() {
 	grep \
@@ -17,6 +25,10 @@ rwx_self_functions() {
 		cut --delimiter "(" --fields 1
 }
 
+# ╭──────┬──────╮
+# │ self │ help │
+# ╰──────┴──────╯
+
 # output help message
 rwx_self_help() {
 	rwx_log \
@@ -25,6 +37,29 @@ 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}"
@@ -46,6 +81,10 @@ rwx_self_install() {
 	rwx_link "${file}" "${RWX_MAIN_PATH}"
 }
 
+# ╭──────┬────────╮
+# │ self │ subset │
+# ╰──────┴────────╯
+
 rwx_self_subset() {
 	local argument path
 	for argument in "${@}"; do
@@ -61,6 +100,10 @@ rwx_self_subset() {
 	done
 }
 
+# ╭──────┬───────╮
+# │ self │ write │
+# ╰──────┴───────╯
+
 rwx_self_write() {
 	local target="${1}"
 	if [ -n "${target}" ]; then