diff --git a/pyproject.toml b/pyproject.toml
index 7a3d9c9..1d231ec 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ dependencies = []
 description = "Read Write eXecute"
 dynamic = ["version"]
 keywords = []
-license-files = ["license.md"]
+license-files = { paths = ["license.md"] }
 name = "rwx"
 readme = "readme.md"
 requires-python = ">= 3.11"
@@ -30,3 +30,16 @@ requires-python = ">= 3.11"
 
 [tool.hatch.version]
 path = "rwx/__init__.py"
+
+[tool.pydoclint]
+allow-init-docstring = true
+quiet = true
+skip-checking-short-docstrings = false
+style = "sphinx"
+
+[tool.ruff]
+line-length = 80
+
+[tool.ruff.lint]
+ignore = ["COM812", "D203", "D213", "ISC001"]
+select = ["ALL"]
diff --git a/rwx/fs/__init__.py b/rwx/fs/__init__.py
index 8a45288..0772a8d 100644
--- a/rwx/fs/__init__.py
+++ b/rwx/fs/__init__.py
@@ -2,9 +2,8 @@
 
 import os
 import shutil
-from pathlib import Path
-
 import tomllib
+from pathlib import Path
 
 from rwx import ps
 
@@ -62,7 +61,7 @@ def get_path_mount(path: Path) -> Path:
             "stat",
             ("--format", "%m"),
             str(path),
-        ),
+        )
     )
 
 
diff --git a/rwx/grub/__init__.py b/rwx/grub/__init__.py
index aa208c3..572b13e 100644
--- a/rwx/grub/__init__.py
+++ b/rwx/grub/__init__.py
@@ -1,7 +1,5 @@
 """Wrap GRUB commands."""
 
-from __future__ import annotations
-
 from rwx import cmd, ps
 
 cmd.need("grub-mkimage")
diff --git a/rwx/ps/__init__.py b/rwx/ps/__init__.py
index 3bef50d..82c9640 100644
--- a/rwx/ps/__init__.py
+++ b/rwx/ps/__init__.py
@@ -1,7 +1,5 @@
 """Handle processes."""
 
-from __future__ import annotations
-
 import subprocess
 
 from rwx import Object, txt
@@ -45,9 +43,7 @@ def run(*items: str | tuple[str, ...]) -> subprocess.CompletedProcess:
     :rtype: subprocess.CompletedProcess
     """
     return subprocess.run(
-        get_tuples_args(*items),
-        capture_output=False,
-        check=True,
+        get_tuples_args(*items), capture_output=False, check=True
     )
 
 
@@ -65,8 +61,7 @@ def run_line(*items: str | tuple[str, ...], charset: str = txt.CHARSET) -> str:
 
 
 def run_lines(
-    *items: str | tuple[str, ...],
-    charset: str = txt.CHARSET,
+    *items: str | tuple[str, ...], charset: str = txt.CHARSET
 ) -> list[str]:
     """Run and return output lines.
 
@@ -77,9 +72,7 @@ def run_lines(
     :rtype: list[str]
     """
     process = subprocess.run(
-        get_tuples_args(*items),
-        capture_output=True,
-        check=True,
+        get_tuples_args(*items), capture_output=True, check=True
     )
     string = process.stdout.decode(charset)
     return string.rstrip().splitlines()
diff --git a/.shellcheckrc b/sh/.shellcheckrc
similarity index 100%
rename from .shellcheckrc
rename to sh/.shellcheckrc
diff --git a/sh/alias/git.sh b/sh/alias/git.sh
index cadd10b..6400092 100644
--- a/sh/alias/git.sh
+++ b/sh/alias/git.sh
@@ -1,4 +1,4 @@
-RWX_GIT_LOG_FORMAT="\
+SH_GIT_LOG_FORMAT="\
 %C(auto)%h%d
 S %C(red)%GS
 A %C(green)%an %ae
@@ -240,12 +240,11 @@ a__git_diff_word() {
 # fetch from the remote repository
 gf() { a__git_fetch "${@}"; }
 a__git_fetch() {
-	rwx_gpg_agent_update &&
-		git \
-			fetch \
-			--tags \
-			--verbose \
-			"${@}"
+	git \
+		fetch \
+		--tags \
+		--verbose \
+		"${@}"
 }
 
 # fetch from remote repository and prune local orphan branches
@@ -294,7 +293,7 @@ a__git_log() {
 		log \
 		--abbrev=8 \
 		--abbrev-commit \
-		--format="${RWX_GIT_LOG_FORMAT}" \
+		--format="${SH_GIT_LOG_FORMAT}" \
 		--graph \
 		"${@}"
 }
@@ -372,12 +371,11 @@ a__git_merge_tool() {
 # push to the remote repository
 gp() { a__git_push "${@}"; }
 a__git_push() {
-	rwx_gpg_agent_update &&
-		git \
-			push \
-			--tags \
-			--verbose \
-			"${@}"
+	git \
+		push \
+		--tags \
+		--verbose \
+		"${@}"
 }
 
 # delete from the remote repository
@@ -535,14 +533,3 @@ a__git_tag_delete() {
 		--delete \
 		"${@}"
 }
-
-# update head ref
-gurh() { a__git_update_ref_head "${@}"; }
-a__git_update_ref_head() {
-	if [ -n "${2}" ]; then
-		git \
-			update-ref \
-			"refs/heads/${1}" \
-			"${2}"
-	fi
-}
diff --git a/sh/alias/gpg.sh b/sh/alias/gpg.sh
index eb19651..496b05e 100644
--- a/sh/alias/gpg.sh
+++ b/sh/alias/gpg.sh
@@ -8,5 +8,7 @@ a__gpg_agent_kill() {
 # bind gpg agent to current tty
 gau() { a__gpg_agent_update "${@}"; }
 a__gpg_agent_update() {
-	rwx_gpg_agent_update
+	gpg-connect-agent \
+		updatestartuptty \
+		/bye
 }
diff --git a/sh/cryptsetup.sh b/sh/cryptsetup.sh
deleted file mode 100644
index 900083d..0000000
--- a/sh/cryptsetup.sh
+++ /dev/null
@@ -1,6 +0,0 @@
-_rwx_cmd_cs() { rwx_crypt_setup "${@}"; }
-
-rwx_crypt_setup() {
-	local action="${1}"
-	echo "cs: ${action}"
-}
diff --git a/sh/ffmpeg.sh b/sh/ffmpeg.sh
deleted file mode 100644
index bcb3a62..0000000
--- a/sh/ffmpeg.sh
+++ /dev/null
@@ -1,194 +0,0 @@
-# ╭────────┬─────────┬───────╮
-# │ ffmpeg │ devices │ reset │
-# ╰────────┴─────────┴───────╯
-
-_rwx_cmd_rwx_ffmpeg_devices_reset() { rwx_ffmpeg_devices_reset "${@}"; }
-rwx_ffmpeg_devices_reset() {
-	local module="uvcvideo"
-	modprobe --remove "${module}" &&
-		modprobe "${module}"
-}
-
-# ╭────────┬────────┬─────────╮
-# │ ffmpeg │ device │ formats │
-# ╰────────┴────────┴─────────╯
-
-rwx_ffmpeg_device_formats() {
-	local device="${1}"
-	[ -n "${device}" ] || device="/dev/video0"
-	ffmpeg \
-		-f "v4l2" \
-		-list_formats "all" \
-		-i "${device}"
-}
-
-# ╭────────┬───────╮
-# │ ffmpeg │ input │
-# ╰────────┴───────╯
-
-rwx_ffmpeg_input_blue_yeti() {
-	local device="alsa_input.\
-usb-Generic_Blue_Microphones_2051BAB04XY8-00.analog-stereo"
-	set -- \
-		-f "pulse" \
-		-i "${device}" \
-		-ac "2" \
-		-ar "48000"
-	local argument
-	for argument in "${@}"; do echo "${argument}"; done
-}
-
-rwx_ffmpeg_input_dell_precision() {
-	local device="alsa_input.\
-pci-0000_00_1f.3.analog-stereo"
-	set -- \
-		-f "pulse" \
-		-i "${device}" \
-		-ac "2" \
-		-ar "48000"
-	local argument
-	for argument in "${@}"; do echo "${argument}"; done
-}
-
-rwx_ffmpeg_input_file() {
-	local file="${1}"
-	local from="${2}"
-	local to="${3}"
-	[ -n "${file}" ] || return
-	set -- \
-		-i "${file}"
-	if [ -n "${to}" ]; then
-		set -- "${@}" \
-			-ss "${from}" \
-			-to "${to}"
-	fi
-	local argument
-	for argument in "${@}"; do echo "${argument}"; done
-}
-
-rwx_ffmpeg_input_hdmi() {
-	local device="${1}"
-	[ -n "${device}" ] || device="/dev/video0"
-	set -- \
-		-f "v4l2" \
-		-video_size "1920x1080" \
-		-framerate "60" \
-		-input_format "yuyv422" \
-		-i "${device}"
-	local argument
-	for argument in "${@}"; do echo "${argument}"; done
-}
-
-# ╭────────┬────────╮
-# │ ffmpeg │ output │
-# ╰────────┴────────╯
-
-rwx_ffmpeg_output_audio_fast() {
-	set -- \
-		-codec:a "flac" \
-		-compression_level "0"
-	local argument
-	for argument in "${@}"; do echo "${argument}"; done
-}
-
-rwx_ffmpeg_output_audio_slow() {
-	set -- \
-		-codec:a "libopus" \
-		-b:a "128k"
-	local argument
-	for argument in "${@}"; do echo "${argument}"; done
-}
-
-rwx_ffmpeg_output_file() {
-	local file="${1}"
-	[ -n "${file}" ] || return
-	set -- \
-		-y "${file}"
-	local argument
-	for argument in "${@}"; do echo "${argument}"; done
-}
-
-rwx_ffmpeg_output_video_fast() {
-	set -- \
-		-codec:v "libx264" \
-		-preset "ultrafast" \
-		-crf "0"
-	local argument
-	for argument in "${@}"; do echo "${argument}"; done
-}
-
-rwx_ffmpeg_output_video_slow() {
-	local crf="${1}"
-	local codec="${2}"
-	[ -n "${codec}" ] || codec="libx264"
-	if [ -z "${crm}" ]; then
-		case "${codec}" in
-		"libx264") crf="23" ;;
-		"libx265") crf="28" ;;
-		*) ;;
-		esac
-	fi
-	set -- \
-		-codec:v "${codec}" \
-		-preset "veryslow" \
-		-crf "${crf}" \
-		-movflags "+faststart" \
-		-pix_fmt "yuv420p"
-	local argument
-	for argument in "${@}"; do echo "${argument}"; done
-}
-
-# ╭────────┬────────╮
-# │ ffmpeg │ record │
-# ╰────────┴────────╯
-
-rwx_ffmpeg_record_hdmi_precision() {
-	local file="${1}"
-	[ -n "${file}" ] || return
-	# LATER alternative
-	# shellcheck disable=SC2046,SC2312
-	set -- \
-		$(rwx_ffmpeg_input_hdmi) \
-		$(rwx_ffmpeg_input_dell_precision) \
-		$(rwx_ffmpeg_output_video_fast) \
-		$(rwx_ffmpeg_output_audio_fast) \
-		$(rwx_ffmpeg_output_file "${file}")
-	echo "${@}"
-	ffmpeg "${@}"
-}
-
-rwx_ffmpeg_record_hdmi_yeti() {
-	local file="${1}"
-	[ -n "${file}" ] || return
-	# LATER alternative
-	# shellcheck disable=SC2046,SC2312
-	set -- \
-		$(rwx_ffmpeg_input_hdmi) \
-		$(rwx_ffmpeg_input_blue_yeti) \
-		$(rwx_ffmpeg_output_video_fast) \
-		$(rwx_ffmpeg_output_audio_fast) \
-		$(rwx_ffmpeg_output_file "${file}")
-	echo "${@}"
-	ffmpeg "${@}"
-}
-
-# ╭────────┬────────╮
-# │ ffmpeg │ reduce │
-# ╰────────┴────────╯
-
-rwx_ffmpeg_reduce() {
-	local input="${1}"
-	local output="${2}"
-	local from="${3}"
-	local to="${4}"
-	[ -n "${output}" ] || return
-	# LATER alternative
-	# shellcheck disable=SC2046,SC2312
-	set -- \
-		$(rwx_ffmpeg_input_file "${input}" "${from}" "${to}") \
-		$(rwx_ffmpeg_output_video_slow) \
-		$(rwx_ffmpeg_output_audio_slow) \
-		$(rwx_ffmpeg_output_file "${output}")
-	echo "${@}"
-	ffmpeg "${@}"
-}
diff --git a/sh/gnome.sh b/sh/gnome.sh
index b17a058..11831fb 100644
--- a/sh/gnome.sh
+++ b/sh/gnome.sh
@@ -1,27 +1,3 @@
-# ╭───────┬────────────╮
-# │ gnome │ background │
-# ╰───────┴────────────╯
-
-rwx_gnome_background_black() {
-	rwx_gnome_set_background "color-shading-type" "solid"
-	rwx_gnome_set_background "primary-color" "#000000"
-}
-
-rwx_gnome_background_white() {
-	rwx_gnome_set_background "color-shading-type" "solid"
-	rwx_gnome_set_background "primary-color" "#ffffff"
-}
-
-rwx_gnome_background_win3() {
-	rwx_gnome_set_background "color-shading-type" "vertical"
-	rwx_gnome_set_background "primary-color" "#000000"
-	rwx_gnome_set_background "secondary-color" "#0000ff"
-}
-
-# ╭───────┬───────╮
-# │ gnome │ proxy │
-# ╰───────┴───────╯
-
 rwx_gnome_proxy() {
 	local value
 	case "${1}" in
@@ -31,29 +7,6 @@ rwx_gnome_proxy() {
 	gsettings set "org.gnome.system.proxy" "mode" "${value}"
 }
 
-# ╭───────┬─────╮
-# │ gnome │ set │
-# ╰───────┴─────╯
-
-rwx_gnome_set() {
-	local group="${1}"
-	local key="${2}"
-	local value="${3}"
-	[ -n "${value}" ] || return
-	gsettings set "${group}" "${key}" "${value}"
-}
-
-rwx_gnome_set_background() {
-	local key="${1}"
-	local value="${2}"
-	[ -n "${value}" ] || return
-	rwx_gnome_set "org.gnome.desktop.background" "${key}" "${value}"
-}
-
-# ╭───────┬────────────╮
-# │ gnome │ workspaces │
-# ╰───────┴────────────╯
-
 rwx_gnome_workspaces_primary() {
 	local bool
 	local group="org.gnome.mutter"
diff --git a/sh/gpg.sh b/sh/gpg.sh
index b5ce07b..a2b7f50 100644
--- a/sh/gpg.sh
+++ b/sh/gpg.sh
@@ -1,10 +1,3 @@
-# bind gpg agent to current tty
-rwx_gpg_agent_update() {
-	gpg-connect-agent \
-		updatestartuptty \
-		/bye
-}
-
 rwx_gpg_ssh_auth_sock() {
 	local user_id
 	user_id=$(id --user)
diff --git a/sh/lint/gitlint.sh b/sh/lint/gitlint.sh
deleted file mode 100644
index 643333c..0000000
--- a/sh/lint/gitlint.sh
+++ /dev/null
@@ -1,6 +0,0 @@
-rwx_gitlint() {
-	local path="${1}"
-	gitlint \
-		--target "${path}" \
-		"lint"
-}
diff --git a/sh/lint/lint.sh b/sh/lint/lint.sh
deleted file mode 100644
index 365773f..0000000
--- a/sh/lint/lint.sh
+++ /dev/null
@@ -1,78 +0,0 @@
-# lint code
-rwx_lint() {
-	local path="${1}"
-	[ -n "${path}" ] || return 1
-	rwx_lint_clean "${path}"
-	rwx_lint_tasks "${path}"
-	set \
-		"python" \
-		"shell"
-	local code
-	for code in "${@}"; do
-		rwx_log "" "${code}"
-		"rwx_lint_${code}" "${path}"
-	done
-	rwx_lint_clean "${path}"
-}
-
-# clean
-rwx_lint_clean() {
-	local path="${1}"
-	[ -n "${path}" ] || return 1
-	rwx_log "" "clean" ""
-	py3clean "${path}"
-	set \
-		"mypy" \
-		"ruff"
-	local tool
-	for tool in "${@}"; do
-		rwx_remove "${path}/.${tool}_cache"
-	done
-}
-
-# lint python code
-rwx_lint_python() {
-	local path="${1}"
-	local action
-	set \
-		"pylint" \
-		"pydoclint" \
-		"mypy" \
-		"ruff"
-	for action in "${@}"; do
-		rwx_log "" "${action}"
-		"rwx_${action}" "${path}"
-	done
-}
-
-# lint shell code
-rwx_lint_shell() {
-	local path="${1}"
-	local action
-	set \
-		"shellcheck" \
-		"shfmt"
-	for action in "${@}"; do
-		rwx_log "" "${action}"
-		"rwx_${action}" "${path}"
-	done
-}
-
-# lint code tasks
-rwx_lint_tasks() {
-	local path="${1}"
-	local type
-	set \
-		"LATER" \
-		"TODO" \
-		"FIXME"
-	for type in "${@}"; do
-		rwx_log "" "${type}"
-		grep \
-			--after "1" \
-			--directories "recurse" \
-			--line-number \
-			" ${type}" \
-			"${path}"
-	done
-}
diff --git a/sh/lint/mypy.sh b/sh/lint/mypy.sh
deleted file mode 100644
index 586d409..0000000
--- a/sh/lint/mypy.sh
+++ /dev/null
@@ -1,4 +0,0 @@
-rwx_mypy() {
-	local path="${1}"
-	mypy "${path}"
-}
diff --git a/sh/lint/pydoclint.sh b/sh/lint/pydoclint.sh
deleted file mode 100644
index d2eb72f..0000000
--- a/sh/lint/pydoclint.sh
+++ /dev/null
@@ -1,9 +0,0 @@
-rwx_pydoclint() {
-	local path="${1}"
-	pydoclint \
-		--allow-init-docstring True \
-		--quiet \
-		--skip-checking-short-docstrings False \
-		--style "sphinx" \
-		"${path}"
-}
diff --git a/sh/lint/pylint.sh b/sh/lint/pylint.sh
deleted file mode 100644
index 52e1bd1..0000000
--- a/sh/lint/pylint.sh
+++ /dev/null
@@ -1,6 +0,0 @@
-rwx_pylint() {
-	local path="${1}"
-	pylint \
-		--enable-all-extensions \
-		"${path}/**/*.py"
-}
diff --git a/sh/lint/ruff.sh b/sh/lint/ruff.sh
deleted file mode 100644
index e15b701..0000000
--- a/sh/lint/ruff.sh
+++ /dev/null
@@ -1,28 +0,0 @@
-rwx_ruff() {
-	local path="${1}"
-	local action
-	set \
-		"check" \
-		"format"
-	for action in "${@}"; do
-		"rwx_ruff_${action}" "${path}"
-	done
-}
-
-rwx_ruff_check() {
-	local path="${1}"
-	ruff check \
-		--ignore "D203,D213" \
-		--isolated \
-		--select "ALL" \
-		"${path}"
-}
-
-rwx_ruff_format() {
-	local path="${1}"
-	ruff format \
-		--diff \
-		--isolated \
-		--line-length "80" \
-		"${path}"
-}
diff --git a/sh/lint/shellcheck.sh b/sh/lint/shellcheck.sh
index ac8c700..f31b2b4 100644
--- a/sh/lint/shellcheck.sh
+++ b/sh/lint/shellcheck.sh
@@ -9,12 +9,6 @@ rwx_shellcheck() {
 		echo ". \"${path}\"" >>"${file}"
 	done
 	rwx_ifs_unset
-	rwx_shellcheck_file "${file}"
-	rwx_remove "${file}"
-}
-
-rwx_shellcheck_file() {
-	local file="${1}"
 	shellcheck \
 		--check-sourced \
 		--enable "all" \
@@ -22,13 +16,5 @@ rwx_shellcheck_file() {
 		--external-sources \
 		--shell "dash" \
 		"${file}"
-}
-
-rwx_shellcheck_write() {
-	rwx_file_write ".shellcheckrc" "\
-disable=3043
-enable=all
-external-sources=true
-shell=sh
-"
+	rm "${file}"
 }
diff --git a/sh/lint/shfmt.sh b/sh/lint/shfmt.sh
index 4d6e894..097de86 100644
--- a/sh/lint/shfmt.sh
+++ b/sh/lint/shfmt.sh
@@ -1,4 +1,4 @@
 rwx_shfmt() {
-	local path="${1}"
-	shfmt --diff "${path}"
+	local root="${1}"
+	shfmt --diff "${root}"
 }
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
old mode 100755
new mode 100644
index 802418f..2b3508c
--- a/sh/main.sh
+++ b/sh/main.sh
@@ -1,35 +1,24 @@
-#! /usr/bin/env sh
-
-# ╭──────┬───────────╮
-# │ main │ constants │
-# ╰──────┴───────────╯
+# ╭───────────╮
+# │ constants │
+# ╰───────────╯
 
 RWX_MAIN_NAME="main.sh"
 RWX_SELF_NAME="rwx"
 
-RWX_SELF_COMMAND="_${RWX_SELF_NAME}_cmd_"
+# ╭───────────╮
+# │ variables │
+# ╰───────────╯
 
-# ╭──────┬───────────╮
-# │ main │ variables │
-# ╰──────┴───────────╯
-
-RWX_COMMAND_ARGUMENT="${0}"
+RWX_ROOT_USER="${HOME}/${RWX_SELF_NAME}"
 RWX_SHELL="$(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_SYSTEM_ROOT="/usr/local/lib"
 
 RWX_MAIN_PATH="${RWX_ROOT_SYSTEM}/${RWX_MAIN_NAME}"
+RWX_ROOT_SYSTEM="${RWX_SYSTEM_ROOT}/${RWX_SELF_NAME}"
 
-# ╭──────┬───────╮
-# │ main │ shell │
-# ╰──────┴───────╯
+# ╭──────╮
+# │ core │
+# ╰──────╯
 
 # test if active shell is in interactive mode
 rwx_shell_interactive() {
@@ -40,7 +29,7 @@ rwx_shell_interactive() {
 }
 
 # ╭──────┬─────╮
-# │ main │ log │
+# │ core │ log │
 # ╰──────┴─────╯
 
 __rwx_log() {
@@ -54,7 +43,7 @@ __rwx_log() {
 }
 
 # ╭──────┬──────╮
-# │ main │ find │
+# │ core │ find │
 # ╰──────┴──────╯
 
 # find directory’s files by extension
@@ -81,7 +70,7 @@ rwx_find_shell() {
 }
 
 # ╭──────┬─────╮
-# │ main │ ifs │
+# │ core │ ifs │
 # ╰──────┴─────╯
 
 rwx_ifs_set() {
@@ -96,19 +85,20 @@ 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 +108,9 @@ rwx_source() {
 	rwx_ifs_unset
 }
 
-# ╭──────╮
-# │ main │
-# ╰──────╯
+# ╭──────┬──────╮
+# │ core │ main │
+# ╰──────┴──────╯
 
 # run initial steps
 rwx_main() {
@@ -130,15 +120,20 @@ rwx_main() {
 		return 1
 	fi
 	# user root
-	rwx_source "${RWX_SELF_USER}"
-	# context / command
-	if [ -n "${RWX_COMMAND_NAME}" ]; then
-		"${RWX_SELF_COMMAND}${RWX_COMMAND_NAME}" "${@}"
-	# context / shell
-	else
-		rwx_self_init
+	rwx_source "${RWX_ROOT_USER}"
+	# 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
 }
 
 # run main function
-rwx_main "${@}"
+rwx_main
diff --git a/sh/python.sh b/sh/python.sh
deleted file mode 100644
index 44ea181..0000000
--- a/sh/python.sh
+++ /dev/null
@@ -1,14 +0,0 @@
-# ╭────────╮
-# │ python │
-# ╰────────╯
-
-# ╭────────┬──────╮
-# │ python │ venv │
-# ╰────────┴──────╯
-
-rwx_python_venv() {
-	local path="${1}"
-	[ -d "${path}" ] || return 1
-	export VIRTUAL_ENV="${path}" && \
-		export PATH="${VIRTUAL_ENV}/bin:${PATH}"
-}
diff --git a/sh/rescue/hetzner.sh b/sh/rescue/hetzner.sh
index 24d6bd0..9d22847 100644
--- a/sh/rescue/hetzner.sh
+++ b/sh/rescue/hetzner.sh
@@ -63,8 +63,6 @@ rwx_rescue_wipe_0_init_hetzner_8_8() {
 	for device in "${@}"; do
 		members="${members} ${device}2"
 	done
-	# LATER alternative
-	# shellcheck disable=SC2086
 	rwx_fs_raid_create \
 		"boot" "00000000:00000000:00000000:00000002" ${members}
 	#
@@ -89,8 +87,6 @@ rwx_rescue_wipe_0_init_hetzner_8_8() {
 	for device in "${@}"; do
 		members="${members} ${device}1"
 	done
-	# LATER alternative
-	# shellcheck disable=SC2086
 	rwx_fs_raid_create \
 		"crypt" "00000000:00000000:00000000:00000001" ${members}
 	# encrypt
diff --git a/sh/self.sh b/sh/self.sh
index 732e9c2..4220366 100644
--- a/sh/self.sh
+++ b/sh/self.sh
@@ -1,57 +1,4 @@
-# meta doc
-rwx_doc() {
-	local name="${1}"
-	[ -n "${name}" ] || return
-	local doc line module
-	rwx_ifs_set
-	for module in $(rwx_find_shell "${RWX_ROOT_SYSTEM}"); do
-		while read -r line; do
-			case "${line}" in
-			"#"*) doc="${doc}${line}" ;;
-			"${name}() {")
-				echo "${doc}"
-				return
-				;;
-			*) doc="" ;;
-			esac
-		done <"${RWX_ROOT_SYSTEM}/${module}"
-	done
-	rwx_ifs_unset
-}
-
-# ╭──────┬───────╮
-# │ self │ check │
-# ╰──────┴───────╯
-
-# check source code
-rwx_self_check() {
-	# check format
-	rwx_log
-	rwx_shfmt "${RWX_ROOT_SYSTEM}"
-	# check syntax
-	rwx_log
-	rwx_shellcheck "${RWX_ROOT_SYSTEM}"
-}
-
-# ╭──────┬──────────╮
-# │ self │ commands │
-# ╰──────┴──────────╯
-
-# get commands from root
-rwx_self_commands() {
-	grep \
-		--directories "recurse" \
-		--no-filename \
-		"^${RWX_SELF_COMMAND}" "${RWX_ROOT_SYSTEM}" |
-		cut --delimiter "(" --fields 1 |
-		sed "s|^${RWX_SELF_COMMAND}||"
-}
-
-# ╭──────┬───────────╮
-# │ self │ functions │
-# ╰──────┴───────────╯
-
-# get functions from root
+# get functions from file
 rwx_self_functions() {
 	grep \
 		--directories "recurse" \
@@ -60,10 +7,6 @@ rwx_self_functions() {
 		cut --delimiter "(" --fields 1
 }
 
-# ╭──────┬──────╮
-# │ self │ help │
-# ╰──────┴──────╯
-
 # output help message
 rwx_self_help() {
 	rwx_log \
@@ -71,92 +14,3 @@ rwx_self_help() {
 		" a__… = aliases" \
 		" u__… = user"
 }
-
-# ╭──────┬──────╮
-# │ self │ init │
-# ╰──────┴──────╯
-
-rwx_self_init() {
-	# run interactive extras
-	if rwx_shell_interactive; then
-		# help
-		rwx_log
-		rwx_self_help
-	fi
-}
-
-# ╭──────┬─────────╮
-# │ self │ install │
-# ╰──────┴─────────╯
-
-_rwx_cmd_rwx_install() { rwx_self_install "${@}"; }
-rwx_self_install() {
-	local target="${1}"
-	local command file root
-	# code
-	if [ -n "${target}" ]; then
-		root="${target}${RWX_ROOT_SYSTEM}"
-		rwx_remove "${root}"
-		cp --recursive "${RWX_ROOT_SYSTEM}" "${root}"
-	fi
-	# commands
-	root="${target}/usr/local/bin"
-	for command in $(rwx_self_commands); do
-		file="${root}/${command}"
-		rwx_remove "${file}"
-		rwx_link "${file}" "${RWX_MAIN_PATH}"
-	done
-	# sh
-	file="${target}/etc/profile.d/${RWX_SELF_NAME}.sh"
-	rwx_remove "${file}"
-	rwx_file_write "${file}" "\
-export ENV=\"${RWX_MAIN_PATH}\"
-"
-	# bash
-	file="${target}/etc/bash.bashrc"
-	rwx_remove "${file}"
-	rwx_link "${file}" "${RWX_MAIN_PATH}"
-}
-
-# ╭──────┬────────╮
-# │ self │ subset │
-# ╰──────┴────────╯
-
-rwx_self_subset() {
-	local argument path
-	for argument in "${@}"; do
-		path="${RWX_ROOT_SYSTEM}/${argument}"
-		if [ -d "${path}" ]; then
-			local file
-			for file in $(rwx_find_shell "${path}"); do
-				echo "${argument}/${file}"
-			done
-		elif [ -f "${path}" ]; then
-			echo "${argument}"
-		fi
-	done
-}
-
-# ╭──────┬───────╮
-# │ self │ write │
-# ╰──────┴───────╯
-
-rwx_self_write() {
-	local target="${1}"
-	if [ -n "${target}" ]; then
-		shift
-		local file text
-		text="#! /usr/bin/env sh
-"
-		rwx_ifs_set
-		for file in $(rwx_self_subset "${@}"); do
-			text="${text}
-$(cat "${RWX_ROOT_SYSTEM}/${file}")
-"
-		done
-		rwx_ifs_unset
-		rwx_file_write "${target}" "${text}"
-		rwx_shfmt "${target}"
-		rwx_shellcheck_file "${target}"
-	fi
-}
diff --git a/sh/shell.sh b/sh/shell.sh
index 7e56658..561fcdd 100644
--- a/sh/shell.sh
+++ b/sh/shell.sh
@@ -71,7 +71,7 @@ rwx_shell_prompt() {
 	id="$(id --user)"
 	local path="${PWD}"
 	local user="${USER}"
-	local view="╰ "
+	local view="└ "
 	# code
 	if [ "${code}" -ne 0 ]; then
 		view="${view}${RWX_COLOR_GREEN}"
@@ -96,7 +96,7 @@ rwx_shell_prompt() {
 	# new
 	view="${view}\\n"
 	# frame
-	view="${view}${RWX_COLOR_DEFAULT}╭ "
+	view="${view}${RWX_COLOR_DEFAULT}┌ "
 	# user
 	if [ "${id}" -eq 0 ]; then
 		view="${view}${RWX_COLOR_GREEN}"
@@ -114,3 +114,12 @@ rwx_shell_prompt() {
 	# print
 	printf "%b" "${view}"
 }
+
+rwx_shell_setup() {
+	# shell
+	echo "export ENV=\"${ENV}\"" >"/etc/profile.d/${RWX_SELF_NAME}.sh"
+	# bash
+	local file="/etc/bash.bashrc"
+	rm --force --recursive "${file}"
+	ln --symbolic "${ENV}" "${file}"
+}
diff --git a/sh/tmux.sh b/sh/tmux.sh
deleted file mode 100644
index d9813e1..0000000
--- a/sh/tmux.sh
+++ /dev/null
@@ -1,264 +0,0 @@
-# ╭──────┬───────╮
-# │ tmux │ setup │
-# ╰──────┴───────╯
-
-rwx_tmux_setup() {
-	local file
-	file="${HOME}/.tmux.conf"
-	rwx_file_write "${file}" "\
-# ╭────────╮
-# │ option │
-# ╰────────╯
-
-# empty name for windows
-set-option -g automatic-rename-format '#{pane_current_command}'
-set-option -g automatic-rename on
-
-# first index number
-set-option -g base-index 1
-
-# display duration
-set-option -g display-time 1536
-
-# extend history limit
-set-option -g history-limit 1048576
-
-# style for messages
-set-option -g message-style bg=red,fg=white
-
-# activity monitoring
-set-window-option -g monitor-activity on
-
-# silence monitoring
-set-window-option -g monitor-silence 0
-
-# enable mouse actions
-set-option -g mouse on
-
-# prefix with ^B or F12
-set-option -g prefix C-b
-set-option -g prefix2 F12
-
-# renumber windows after closing one
-set-option -g renumber-windows on
-
-# enable title
-set-option -g set-titles on
-
-# set title to working directory
-set-option -g set-titles-string '\
-#{session_name}\
- - \
-#{window_index}∕#{session_windows} #{window_name}\
- - \
-#{pane_index}∕#{window_panes} #{pane_current_command}\
-'
-
-# ╭────────┬──────╮
-# │ option │ pane │
-# ╰────────┴──────╯
-
-# first index number
-set-option -g pane-base-index 1
-
-# ╭────────┬──────┬────────╮
-# │ option │ pane │ border │
-# ╰────────┴──────┴────────╯
-
-# active style
-set-option -g pane-active-border-style fg=green
-
-# regular style
-set-option -g pane-border-style fg=blue
-
-# ╭────────┬────────╮
-# │ option │ status │
-# ╰────────┴────────╯
-
-# status lines
-set-option -g status 3
-
-# background color
-set-option -g status-bg '#0D0D0D'
-
-# foreground color
-set-option -g status-fg white
-
-# line 1
-set-option -g status-format[0] '\
-#{W:\
-#[bg=##202020] #[bg=##303030]\
-#{?window_zoomed_flag,#[fg=magenta][, }\
-#[fg=yellow]#{window_index}\
-#{?window_zoomed_flag,#[fg=magenta]], }\
- \
-#{?window_active,#[fg=green],\
-#{?window_activity_flag,#[fg=red],#[fg=blue]}}\
-#{window_name}\
-#[bg=##303030] #[bg=##202020] \
-#[bg=default] \
-}\
-#[align=right]\
-#[bg=##202020] #[bg=##303030] \
-#[fg=yellow]%H:%M:%S\
-#[bg=##303030] #[bg=##202020]\
-#{?client_prefix,#[fg=green]p, }\
-'
-
-# line 2
-set-option -g status-format[1] '\
-#{S:\
-#[bg=##202020] #[bg=##303030] \
-#{?session_many_attached,#[fg=red],\
-#{?session_attached,#[fg=magenta],#[fg=blue]}}\
-#{session_name}\
-#[bg=##303030] #[bg=##202020] \
-#[bg=default] \
-}\
-#[fg=yellow]→ #[fg=green]#{session_name} \
-#[align=right]\
-#[bg=##202020] #[bg=##303030] \
-#[fg=yellow]%Y-%m-%d\
-#[bg=##303030] #[bg=##202020] \
-'
-
-# line 3
-set-option -g status-format[2] '\
-#[fg=cyan]#{pane_current_path}\
-#[align=right]\
-#[bg=##202020] #[bg=##303030] \
-#[fg=yellow]#{host}\
-#[bg=##303030] #[bg=##202020] \
-'
-
-# line 4
-set-option -g status-format[3] '\
-#{P:\
-#[bg=##202020] #[bg=##303030] \
-#[fg=yellow]#{pane_index}\
- \
-#{?pane_active,#[fg=green],#[fg=blue]}\
-#{pane_current_command}\
-#[bg=##303030] #[bg=##202020] \
-#[bg=default] \
-}\
-#[align=right]\
-#[bg=##202020] #[bg=##303030] \
-#{?uid,#[fg=green],#[fg=red]}\
-#{user}\
-#[bg=##303030] #[bg=##202020] \
-'
-
-# line 5
-set-option -g status-format[4] '\
-#{P:\
-#[bg=##202020] #[bg=##303030] \
-#[fg=yellow]#{pane_index}\
- \
-#{?pane_active,#[fg=green],#[fg=blue]}\
-#{pane_width}×#{pane_height}\
-#[bg=##303030] #[bg=##202020] \
-#[bg=default] \
-}\
-#[align=right]\
-#[bg=##202020] #[bg=##303030] \
-#[fg=green]#{window_width}×#{window_height}\
-#[bg=##303030] #[bg=##202020] \
-'
-
-# refresh period
-set-option -g status-interval 1
-
-# bar location
-set-option -g status-position bottom
-
-# ╭─────╮
-# │ key │
-# ╰─────╯
-
-# detach client
-bind-key -n F6 detach-client
-
-# new window
-bind-key -n F2 new-window
-
-# select pane
-bind-key -n C-S-Down select-pane -D
-bind-key -n C-S-Left select-pane -L
-bind-key -n C-S-Right select-pane -R
-bind-key -n C-S-Up select-pane -U
-
-# status lines
-bind-key -n C-F10 set-option -g status off
-bind-key -n C-F1 set-option -g status on
-bind-key -n C-F2 set-option -g status 2
-bind-key -n C-F3 set-option -g status 3
-bind-key -n C-F4 set-option -g status 4
-bind-key -n C-F5 set-option -g status 5
-
-# switch session
-bind-key -n M-Down switch-client -n
-bind-key -n M-Up switch-client -p
-
-# switch window
-bind-key -n M-Left previous-window
-bind-key -n M-Right next-window
-
-# ╭─────┬────────╮
-# │ key │ prefix │
-# ╰─────┴────────╯
-
-# rename
-bind-key C-s command-prompt { rename-session '%%' }
-bind-key C-w command-prompt { rename-window '%%' }
-
-# split window
-bind-key h split-window -h
-bind-key v split-window -v
-
-# toggle mouse
-bind-key t set-option -g mouse \\; display-message 'mouse = #{mouse}'
-
-# reload configuration
-bind-key r source-file ${file} \\; display-message 'source-file ${file}'
-
-# swap window
-bind-key M-Left swap-window -t -1
-bind-key M-Right swap-window -t +1
-
-#                                           ╭─────────────╮
-#                                           │ default     │
-#                     ╭───────────┬─────────┼─────┬───────┤
-#                     │ -n        │ F12     │ -n  │ C-b   │
-# ╭───────────────────┼───────────┼─────────┼─────┼───────┤
-# │ command-prompt    │           │         │     │ :     │
-# │ copy-mode         │           │         │     │ PPage │
-# │ detach-client     │           │         │     │ d     │
-# │ new-session       │           │         │     │       │
-# │ new-window        │ F2        │         │     │ c     │
-# │ next-window       │ M-Right   │         │     │ n     │
-# │ previous-window   │ M-Left    │         │     │ p     │
-# │ rename-session    │           │ C-s     │     │       │
-# │ rename-window     │           │ C-w     │     │       │
-# │ resize-pane -Z    │           │         │     │ z     │
-# │ select-pane -D    │ C-S-Down  │         │     │       │
-# │ select-pane -L    │ C-S-Left  │         │     │       │
-# │ select-pane -R    │ C-S-Right │         │     │       │
-# │ select-pane -U    │ C-S-Up    │         │     │       │
-# │ set -g mouse      │           │ t       │     │       │
-# │ set -g status off │ C-F10     │         │     │       │
-# │ set -g status on  │ C-F1      │         │     │       │
-# │ set -g status 2   │ C-F2      │         │     │       │
-# │ set -g status 3   │ C-F3      │         │     │       │
-# │ set -g status 4   │ C-F4      │         │     │       │
-# │ set -g status 5   │ C-F5      │         │     │       │
-# │ source-file       │           │ r       │     │       │
-# │ split-window -h   │           │ h       │     │ %     │
-# │ split-window -v   │           │ v       │     │ \"     │
-# │ swap-window -t -1 │           │ M-Left  │     │       │
-# │ swap-window -t +1 │           │ M-Right │     │       │
-# │ switch-client -n  │ M-Down    │         │     │       │
-# │ switch-client -p  │ M-Up      │         │     │       │
-# ╰───────────────────┴───────────┴─────────┴─────┴───────╯
-"
-}
diff --git a/sh/util.sh b/sh/util.sh
index cbcd67a..7d9cc3f 100644
--- a/sh/util.sh
+++ b/sh/util.sh
@@ -1,35 +1,3 @@
-rwx_file_append() {
-	local file="${1}"
-	local text="${2}"
-	if [ -n "${file}" ]; then
-		printf "%s" "${text}" >>"${file}"
-	fi
-}
-
-rwx_file_empty() {
-	local file="${1}"
-	if [ -n "${file}" ]; then
-		rwx_file_write "${file}" ""
-	fi
-}
-
-rwx_file_write() {
-	local file="${1}"
-	local text="${2}"
-	if [ -n "${file}" ]; then
-		printf "%s" "${text}" >"${file}"
-	fi
-}
-
-rwx_link() {
-	local link="${1}"
-	local target="${2}"
-	ln \
-		--symbolic \
-		"${target}" \
-		"${link}"
-}
-
 rwx_list_block_devices() {
 	lsblk \
 		--noempty \
@@ -60,13 +28,6 @@ rwx_read_secret() {
 	unset secret
 }
 
-rwx_remove() {
-	rm \
-		--force \
-		--recursive \
-		"${@}"
-}
-
 rwx_warn_wipe() {
 	local tmp
 	rwx_list_block_devices