diff --git a/readme.md b/readme.md
index f8d9ebc..c028469 100644
--- a/readme.md
+++ b/readme.md
@@ -217,12 +217,11 @@ Handle project workflows in a unified way:
 
 * build instead of readme
 * generate graphs
-* list behavior differences
-  * Continuous Integration platforms
-  * Operating Systems
+* list CI behavior differences
 
 #### Shell
 
+* command to echo & run
 * comment
 * handle errors
 * packages
@@ -239,6 +238,8 @@ Handle project workflows in a unified way:
       * disable & enable https
 * locales
   * persist
+  * restrict LC_* variables set for alpine
+  * test LC_* variables
 * test
 
 #### Shell → Python
diff --git a/spcd.sh b/spcd.sh
deleted file mode 100755
index a577aed..0000000
--- a/spcd.sh
+++ /dev/null
@@ -1,27 +0,0 @@
-#! /usr/bin/env sh
-
-gource \
---auto-skip-seconds 1 \
---date-format "%Y / %m / %d ⋅ %H : %M : %S" \
---disable-progress \
--f \
---hide mouse,usernames \
---highlight-dirs \
---key \
---output-framerate 60 \
---seconds-per-day 2.0 \
---output-ppm-stream - \
-| \
-ffmpeg \
--codec:v ppm \
--format image2pipe \
--framerate 120 \
--i - \
--codec:v libx264 \
--preset veryslow \
--qp 23 \
--movflags \
-+faststart \
--pix_fmt yuv420p \
--y \
-spcd.mp4
diff --git a/spcd/bootstrap.sh b/spcd/bootstrap.sh
index 0268849..616a705 100644
--- a/spcd/bootstrap.sh
+++ b/spcd/bootstrap.sh
@@ -1,20 +1,8 @@
 #! /usr/bin/env sh
 
-# ╭───────────────╮
-# │ __ = internal │
-# ╰───────────────╯
-
-# __SPCD_BANNER_TOP
-# __SPCD_BANNER_MIDDLE
-# __SPCD_BANNER_BOTTOM
-
-# __SPCD_STEP_LEVEL
-# __SPCD_STEP_level_INDEX
-# __SPCD_STEP_level_LABEL
-
-# ╭─────────────╮
-# │ _ = private │
-# ╰─────────────╯
+# ╭───╮
+# │ _ │
+# ╰───╯
 
 _SPCD_BOX_DOWN_AND_HORIZONTAL="┬"
 _SPCD_BOX_DOWN_AND_LEFT="╮"
@@ -155,11 +143,11 @@ _SPCD_FRAME_TOP="${_SPCD_BOX_DOWN_AND_RIGHT}${_SPCD_BOX_LEFT}"
 _SPCD_FRAME_BOTTOM="${_SPCD_BOX_UP_AND_RIGHT}${_SPCD_BOX_LEFT}"
 
 _spcd_frame_open() {
-    echo "${_SPCD_FRAME_TOP}${*}"
+    echo "${_SPCD_FRAME_TOP}${1}"
 }
 
 _spcd_frame_shut() {
-    echo "${_SPCD_FRAME_BOTTOM}${*}"
+    echo "${_SPCD_FRAME_BOTTOM}${1}"
 }
 
 # ╭───┬────╮
@@ -207,9 +195,9 @@ _spcd_txt_pick() {
     esac
 }
 
-# ╭────────────╮
-# │ p = public │
-# ╰────────────╯
+# ╭───────────╮
+# │ functions │
+# ╰───────────╯
 
 spcd_ca() {
     local grep="\(After\|Before\|Issuer\|Signature Algorithm\|Subject:\)"
@@ -259,17 +247,9 @@ nameserver ${value}
     fi
 }
 
-spcd_run() {
-    if [ -n "${1}" ]; then
-        _spcd_frame_open "${@}"
-        "${@}"
-        _spcd_frame_shut "${@}"
-    fi
-}
-
-# ╭───┬───────╮
-# │ p │ error │
-# ╰───┴───────╯
+# ╭───────────┬───────╮
+# │ functions │ error │
+# ╰───────────┴───────╯
 
 spcd_error_ci() {
     echo "× CI: ${*}"
@@ -282,9 +262,9 @@ spcd_error_os() {
     exit "${_SPCD_ERROR_OS}"
 }
 
-# ╭───┬────╮
-# │ p │ os │
-# ╰───┴────╯
+# ╭───────────┬────╮
+# │ functions │ os │
+# ╰───────────┴────╯
 
 spcd_os_grep() {
     local variable="${1}"
@@ -349,17 +329,17 @@ spcd_os_write() {
     fi
 }
 
-# ╭───┬───────╮
-# │ p │ split │
-# ╰───┴───────╯
+# ╭───────────┬───────╮
+# │ functions │ split │
+# ╰───────────┴───────╯
 
 spcd_split() {
     echo "${_SPCD_RULE_LEFT}${_SPCD_RULE_MIDDLE}${_SPCD_RULE_RIGHT}"
 }
 
-# ╭───┬──────╮
-# │ p │ step │
-# ╰───┴──────╯
+# ╭───────────┬──────╮
+# │ functions │ step │
+# ╰───────────┴──────╯
 
 spcd_step() {
     if [ -n "${1}" ]; then
@@ -383,9 +363,9 @@ spcd_step_out() {
     __SPCD_STEP_LEVEL=$((__SPCD_STEP_LEVEL - 1))
 }
 
-# ╭───┬─────╮
-# │ p │ txt │
-# ╰───┴─────╯
+# ╭───────────┬─────╮
+# │ functions │ txt │
+# ╰───────────┴─────╯
 
 SPCD_TXT_LOCALE_ENGLISH="en_US"
 SPCD_TXT_LOCALE_FRENCH="fr_FR"
@@ -397,13 +377,13 @@ spcd_txt_get() {
     esac
 }
 
-# ╭──────────╮
-# │ s = step │
-# ╰──────────╯
+# ╭──────╮
+# │ step │
+# ╰──────╯
 
-# ╭───┬───────────╮
-# │ s │ constants │
-# ╰───┴───────────╯
+# ╭──────┬───────────╮
+# │ step │ constants │
+# ╰──────┴───────────╯
 
 SPCD_OS_ALMA="alma"
 SPCD_OS_ALPINE="alpine"
@@ -420,9 +400,9 @@ SPCD_PM_DNF="dnf"
 SPCD_PM_PACMAN="pacman"
 SPCD_PM_ZYPPER="zypper"
 
-# ╭───┬─────────────╮
-# │ s │ environment │
-# ╰───┴─────────────╯
+# ╭──────┬─────────────╮
+# │ step │ environment │
+# ╰──────┴─────────────╯
 
 spcd_step__environment_print() {
     spcd_ca "list"
@@ -790,9 +770,20 @@ spcd_step__environment_list_workspace() {
     spcd_os_ls "$(realpath .)"
 }
 
-# ╭──────────────╮
-# │ f = function │
-# ╰──────────────╯
+# ╭──────┬───────────╮
+# │ step │ functions │
+# ╰──────┴───────────╯
+
+spcd_clean_cache() {
+    case "${SPCD_PM}" in
+    "${SPCD_PM_APK}") apk cache purge ;;
+    "${SPCD_PM_APT}") apt-get clean ;;
+    "${SPCD_PM_DNF}") dnf clean all ;;
+    "${SPCD_PM_PACMAN}") pacman --sync --clean --noconfirm ;;
+    "${SPCD_PM_ZYPPER}") zypper clean ;;
+    *) ;;
+    esac
+}
 
 spcd_git_clone() {
     if [ -n "${1}" ]; then
@@ -815,6 +806,29 @@ spcd_git_url() {
     fi
 }
 
+spcd_https_path() {
+    case "${SPCD_PM}" in
+    "${SPCD_PM_APK}") echo "/etc/apk/repositories.d/https" ;;
+    "${SPCD_PM_APT}") echo "/etc/apt/apt.conf.d/https" ;;
+    "${SPCD_PM_DNF}") echo "/etc/dnf/dnf.conf.d/https.conf" ;;
+    "${SPCD_PM_PACMAN}") echo "/etc/pacman.d/https.conf" ;;
+    "${SPCD_PM_ZYPPER}") ;;
+    *) ;;
+    esac
+}
+
+spcd_install_package() {
+    case "${SPCD_PM}" in
+    "${SPCD_PM_APK}") apk add "${1}" ;;
+    "${SPCD_PM_APT}") apt-get install --assume-yes "${1}" ;;
+    "${SPCD_PM_DNF}") dnf install --assumeyes "${1}" ;;
+    "${SPCD_PM_PACMAN}") pacman --sync --noconfirm "${1}" ;;
+    "${SPCD_PM_ZYPPER}") zypper --non-interactive install "${1}" ;;
+    *) ;;
+    esac
+    spcd_clean_cache
+}
+
 spcd_python_ln() {
     local command="${1}"
     if [ -n "${command}" ]; then
@@ -836,6 +850,17 @@ spcd_python_pip() {
     fi
 }
 
+spcd_query_package() {
+    case "${SPCD_PM}" in
+    "${SPCD_PM_APK}") apk info "${1}" ;;
+    "${SPCD_PM_APT}") dpkg-query --show "${1}" ;;
+    "${SPCD_PM_DNF}") rpm --query "${1}" ;;
+    "${SPCD_PM_PACMAN}") pacman --query "${1}" ;;
+    "${SPCD_PM_ZYPPER}") rpm --query "${1}" ;;
+    *) ;;
+    esac
+}
+
 spcd_txt_locale() {
     local action="${1}"
     local chosen="${2}"
@@ -890,37 +915,6 @@ spcd_txt_locale() {
         spcd_split
         spcd_txt_locale "list"
         ;;
-    "show")
-        local regex
-        for name in "${@}"; do
-            unset regex
-            case "${name}" in
-            # LC_CTYPE
-            "LC_NUMERIC") regex="^\(decimal\|thousands\|grouping\)" ;;
-            "LC_TIME") regex="^\(day\|mon\)" ;;
-            # LC_COLLATE
-            "LC_MONETARY")
-                case "${SPCD_OS_ID}" in
-                "${SPCD_OS_ALPINE}") ;;
-                *) regex="^\(int_curr\|currency\|mon_\)" ;;
-                esac
-                ;;
-            "LC_MESSAGES") regex="^\(yes\|no\)" ;;
-            "LC_PAPER") regex="^\(height\|width\)" ;;
-            "LC_NAME") regex="^name_m" ;;
-            "LC_ADDRESS") regex="^\(country\|lang\)_name" ;;
-            "LC_TELEPHONE") regex="^int_" ;;
-            "LC_MEASUREMENT") regex="^measurement=" ;;
-            "LC_IDENTIFICATION") regex="^\(language\|territory\|title\)" ;;
-            *) ;;
-            esac
-            spcd_split
-            spcd_os_printenv "${name}"
-            if [ -n "${regex}" ]; then
-                locale --keyword-name "${name}" | grep "${regex}"
-            fi
-        done
-        ;;
     *) ;;
     esac
 }
@@ -938,7 +932,7 @@ spcd_txt_locales() {
         spcd_split
         case "${SPCD_PM}" in
         "${SPCD_PM_APK}")
-            spcd_f_pm_install "musl-locales"
+            spcd_install_package "musl-locales"
             export MUSL_LOCPATH="/usr/share/i18n/locales/musl"
             ;;
         "${SPCD_PM_APT}")
@@ -949,17 +943,17 @@ ${name}.${_SPCD_TXT_CHARSET} ${_SPCD_TXT_CHARSET}
 "
             done
             spcd_os_write "/etc/locale.gen" "${text}"
-            spcd_f_pm_install "locales"
+            spcd_install_package "locales"
             ;;
         "${SPCD_PM_DNF}")
             local language
             for name in "${@}"; do
                 language="$(echo "${name}" | cut -d _ -f 1)"
-                spcd_f_pm_install "glibc-langpack-${language}"
+                spcd_install_package "glibc-langpack-${language}"
             done
             ;;
-        "${SPCD_PM_PACMAN}") spcd_f_pm_install "glibc-locales" ;;
-        "${SPCD_PM_ZYPPER}") spcd_f_pm_install "glibc-locale" ;;
+        "${SPCD_PM_PACMAN}") spcd_install_package "glibc-locales" ;;
+        "${SPCD_PM_ZYPPER}") spcd_install_package "glibc-locale" ;;
         *) ;;
         esac
         spcd_split
@@ -981,7 +975,7 @@ ${name}.${_SPCD_TXT_CHARSET} ${_SPCD_TXT_CHARSET}
         done
         ;;
     "list")
-        if ! spcd_run locale --all-locales; then
+        if ! locale --all-locales; then
             echo "No locales yet!"
         fi
         ;;
@@ -989,133 +983,18 @@ ${name}.${_SPCD_TXT_CHARSET} ${_SPCD_TXT_CHARSET}
     esac
 }
 
-# ╭───┬────╮
-# │ f │ pm │
-# ╰───┴────╯
-
-spcd_f_pm_clean() {
-    case "${SPCD_PM}" in
-    "${SPCD_PM_APK}") spcd_run apk cache purge ;;
-    "${SPCD_PM_APT}") spcd_run apt-get clean ;;
-    "${SPCD_PM_DNF}") spcd_run dnf clean all ;;
-    "${SPCD_PM_PACMAN}") spcd_run pacman --sync --clean --noconfirm ;;
-    "${SPCD_PM_ZYPPER}") spcd_run zypper clean ;;
-    *) ;;
-    esac
-}
-
-spcd_f_pm_install() {
-    case "${SPCD_PM}" in
-    "${SPCD_PM_APK}") spcd_run apk add "${1}" ;;
-    "${SPCD_PM_APT}") spcd_run apt-get install --assume-yes "${1}" ;;
-    "${SPCD_PM_DNF}") spcd_run dnf install --assumeyes "${1}" ;;
-    "${SPCD_PM_PACMAN}") spcd_run pacman --sync --noconfirm "${1}" ;;
-    "${SPCD_PM_ZYPPER}") spcd_run zypper --non-interactive install "${1}" ;;
-    *) ;;
-    esac
-    spcd_f_pm_clean
-}
-
-spcd_f_pm_query() {
-    case "${SPCD_PM}" in
-    "${SPCD_PM_APK}") apk info "${1}" ;;
-    "${SPCD_PM_APT}") dpkg-query --show "${1}" ;;
-    "${SPCD_PM_DNF}") rpm --query "${1}" ;;
-    "${SPCD_PM_PACMAN}") pacman --query "${1}" ;;
-    "${SPCD_PM_ZYPPER}") rpm --query "${1}" ;;
-    *) ;;
-    esac
-}
-
-spcd_f_pm_update() {
-    spcd_step "Update"
-    case "${SPCD_PM}" in
-    "${SPCD_PM_APK}") spcd_run apk update ;;
-    "${SPCD_PM_APT}") spcd_run apt-get update ;;
-    "${SPCD_PM_DNF}") spcd_run dnf makecache ;;
-    "${SPCD_PM_PACMAN}") spcd_run pacman --sync --refresh ;;
-    "${SPCD_PM_ZYPPER}") spcd_run zypper refresh ;;
-    *) ;;
-    esac
-}
-
-spcd_f_pm_upgrade() {
-    spcd_step "Upgrade"
-    case "${SPCD_PM}" in
-    "${SPCD_PM_APK}") spcd_run apk upgrade ;;
-    "${SPCD_PM_APT}") spcd_run apt-get upgrade --assume-yes ;;
-    "${SPCD_PM_DNF}") spcd_run dnf upgrade --assumeyes ;;
-    "${SPCD_PM_PACMAN}") spcd_run pacman --sync --sysupgrade --noconfirm ;;
-    "${SPCD_PM_ZYPPER}") spcd_run zypper --non-interactive update ;;
-    *) ;;
-    esac
-}
-
-# ╭───┬────┬───────╮
-# │ f │ pm │ https │
-# ╰───┴────┴───────╯
-
-spcd_f_pm_https_path() {
-    case "${SPCD_PM}" in
-    "${SPCD_PM_APK}") echo "/etc/apk/repositories.d/https" ;;
-    "${SPCD_PM_APT}") echo "/etc/apt/apt.conf.d/https" ;;
-    "${SPCD_PM_DNF}") echo "/etc/dnf/dnf.conf.d/https.conf" ;;
-    "${SPCD_PM_PACMAN}") echo "/etc/pacman.d/https.conf" ;;
-    "${SPCD_PM_ZYPPER}") ;;
-    *) ;;
-    esac
-}
-
-spcd_f_pm_https_trust() {
-    spcd_step "Trust"
-    local path text
-    if [ -n "${SPCD_CA_1}" ] || [ "${SPCD_PM}" = "${SPCD_PM_APT}" ]; then
-        path="$(spcd_f_pm_https_path)"
-        if [ -n "${path}" ]; then
-            spcd_os_mkdir "$(dirname "${path}")"
-            case "${SPCD_PM}" in
-            "${SPCD_PM_APK}") text="\
---no-verify
-" ;;
-            "${SPCD_PM_APT}") text="\
-Acquire::https::Verify-Peer False;
-" ;;
-            "${SPCD_PM_DNF}") text="\
-sslverify=False
-" ;;
-            "${SPCD_PM_PACMAN}") text="\
-SSLVerify = No
-" ;;
-            "${SPCD_PM_ZYPPER}") ;;
-            *) ;;
-            esac
-            [ -n "${text}" ] &&
-                spcd_os_write "${path}" "${text}"
-        fi
-    fi
-}
-
-spcd_f_pm_https_verify() {
-    spcd_step "Verify"
-    local path
-    path="$(spcd_f_pm_https_path)"
-    if [ -n "${path}" ]; then
-        spcd_os_rm "${path}"
-    fi
-}
-
-# ╭───┬─────╮
-# │ s │ dns │
-# ╰───┴─────╯
+# ╭──────┬─────╮
+# │ step │ dns │
+# ╰──────┴─────╯
 
 spcd_step__dns() {
     spcd_step "DNS"
     spcd_dns "write"
 }
 
-# ╭───┬──────────╮
-# │ s │ packages │
-# ╰───┴──────────╯
+# ╭──────┬──────────╮
+# │ step │ packages │
+# ╰──────┴──────────╯
 
 spcd_step__packages_set_repositories() {
     spcd_step "Set repositories"
@@ -1288,20 +1167,60 @@ Dir::Etc::SourceParts \"\";
     esac
     case "${SPCD_OS_ID}" in
     "${SPCD_OS_ARCH}")
-        spcd_run pacman-key --init
+        pacman-key --init
         ;;
     "${SPCD_OS_DEBIAN}" | "${SPCD_OS_UBUNTU}")
         export DEBIAN_FRONTEND="noninteractive"
-        spcd_os_printenv DEBIAN_FRONTEND
         ;;
     *) ;;
     esac
 }
 
+spcd_step__packages_trust_https() {
+    spcd_step "Trust HTTPS"
+    local path text
+    if [ -n "${SPCD_CA_1}" ] || [ "${SPCD_PM}" = "${SPCD_PM_APT}" ]; then
+        path="$(spcd_https_path)"
+        if [ -n "${path}" ]; then
+            spcd_os_mkdir "$(dirname "${path}")"
+            case "${SPCD_PM}" in
+            "${SPCD_PM_APK}") text="\
+--no-verify
+" ;;
+            "${SPCD_PM_APT}") text="\
+Acquire::https::Verify-Peer False;
+" ;;
+            "${SPCD_PM_DNF}") text="\
+sslverify=False
+" ;;
+            "${SPCD_PM_PACMAN}") text="\
+SSLVerify = No
+" ;;
+            "${SPCD_PM_ZYPPER}") ;;
+            *) ;;
+            esac
+            [ -n "${text}" ] &&
+                spcd_os_write "${path}" "${text}"
+        fi
+    fi
+}
+
+spcd_step__packages_update_catalog() {
+    spcd_step "Update catalog"
+    case "${SPCD_PM}" in
+    "${SPCD_PM_APK}") apk update ;;
+    "${SPCD_PM_APT}") apt-get update ;;
+    "${SPCD_PM_DNF}") dnf makecache ;;
+    "${SPCD_PM_PACMAN}") pacman --sync --refresh ;;
+    "${SPCD_PM_ZYPPER}") zypper refresh ;;
+    *) ;;
+    esac
+}
+
 spcd_step__packages_install_tools() {
     spcd_step "Install tools"
     case "${SPCD_PM}" in
-    "${SPCD_PM_APT}") spcd_f_pm_install "apt-utils" ;;
+    "${SPCD_PM_APT}") spcd_install_package "apt-utils" ;;
     *) ;;
     esac
 }
@@ -1312,18 +1231,51 @@ spcd_step__packages_install_locales() {
     spcd_txt_locales "install"
     spcd_step "Set"
     spcd_txt_locale "set" "${SPCD_TXT_LOCALE}"
-    spcd_step "Show"
-    spcd_txt_locale "show"
+    spcd_step "Test"
+    # CTYPE
+    # NUMERIC
+    spcd_split
+    locale --keyword-name LC_NUMERIC | grep "^\(decimal\|thousands\|grouping\)"
+    # TIME
+    spcd_split
+    locale --keyword-name LC_TIME | grep "^\(day\|mon\)"
+    # COLLATE
+    # MONETARY
+    spcd_split
+    locale --keyword-name LC_MONETARY | grep "^\(int_curr\|currency\|mon_\)"
+    # MESSAGES
+    spcd_split
+    locale --keyword-name LC_MESSAGES | grep "^\(yes\|no\)"
+    #
+    # PAPER
+    spcd_split
+    locale --keyword-name LC_PAPER | grep "^\(height\|width\)"
+    # NAME
+    spcd_split
+    locale --keyword-name LC_NAME | grep "^name_m"
+    # ADDRESS
+    spcd_split
+    locale --keyword-name LC_ADDRESS | grep "^\(country\|lang\)_name"
+    # TELEPHONE
+    spcd_split
+    locale --keyword-name LC_TELEPHONE | grep "^int_"
+    # MEASUREMENT
+    spcd_split
+    locale --keyword-name LC_MEASUREMENT | grep "^measurement="
+    # IDENTIFICATION
+    spcd_split
+    locale --keyword-name LC_IDENTIFICATION |
+        grep "^\(language\|territory\|title\)"
     spcd_step_out
 }
 
-# ╭───┬────╮
-# │ s │ ca │
-# ╰───┴────╯
+# ╭──────┬────╮
+# │ step │ ca │
+# ╰──────┴────╯
 
 spcd_step__ca_install_package() {
     spcd_step "Install package"
-    spcd_f_pm_install "ca-certificates"
+    spcd_install_package "ca-certificates"
 }
 
 spcd_step__ca_write_certificates() {
@@ -1355,39 +1307,60 @@ spcd_step__ca_update_certificates() {
         "${SPCD_OS_ALMA}" | \
         "${SPCD_OS_FEDORA}" | \
         "${SPCD_OS_ROCKY}")
-        spcd_run update-ca-trust
+        update-ca-trust
         ;;
     "${SPCD_OS_ALPINE}" | \
         "${SPCD_OS_DEBIAN}" | \
         "${SPCD_OS_OPENSUSE}" | \
         "${SPCD_OS_UBUNTU}")
-        spcd_run update-ca-certificates
+        update-ca-certificates
         ;;
     *) ;;
     esac
 }
 
-# ╭───┬──────────╮
-# │ s │ packages │
-# ╰───┴──────────╯
+# ╭──────┬──────────╮
+# │ step │ packages │
+# ╰──────┴──────────╯
+
+spcd_step__packages_verify_https() {
+    spcd_step "Verify HTTPS"
+    local path
+    path="$(spcd_https_path)"
+    if [ -n "${path}" ]; then
+        spcd_os_rm "${path}"
+    fi
+}
+
+spcd_step__packages_upgrade_system() {
+    spcd_step "Upgrade system"
+    case "${SPCD_PM}" in
+    "${SPCD_PM_APK}") apk upgrade ;;
+    "${SPCD_PM_APT}") apt-get upgrade --assume-yes ;;
+    "${SPCD_PM_DNF}") dnf upgrade --assumeyes ;;
+    "${SPCD_PM_PACMAN}") pacman --sync --sysupgrade --noconfirm ;;
+    "${SPCD_PM_ZYPPER}") zypper --non-interactive update ;;
+    *) ;;
+    esac
+}
 
 spcd_step__packages_install_dos2unix() {
     spcd_step "Install dos2unix"
-    spcd_f_pm_install "dos2unix"
+    spcd_install_package "dos2unix"
 }
 
 spcd_step__packages_install_git() {
     spcd_step "Install Git"
-    spcd_f_pm_install "git"
+    spcd_install_package "git"
 }
 
-# ╭───┬────────╮
-# │ s │ python │
-# ╰───┴────────╯
+# ╭──────┬────────╮
+# │ step │ python │
+# ╰──────┴────────╯
 
 spcd_step__python_install() {
     spcd_step "Install package"
-    spcd_f_pm_install "${SPCD_PYTHON_PACKAGE}"
+    spcd_install_package "${SPCD_PYTHON_PACKAGE}"
     spcd_step "Link alias to command"
     spcd_python_ln "${SPCD_PYTHON_COMMAND}"
     # venv
@@ -1395,7 +1368,7 @@ spcd_step__python_install() {
     spcd_step "Install package"
     case "${SPCD_OS_ID}" in
     "${SPCD_OS_DEBIAN}" | "${SPCD_OS_UBUNTU}")
-        spcd_f_pm_install "python3-venv"
+        spcd_install_package "python3-venv"
         ;;
     *) ;;
     esac
@@ -1445,7 +1418,7 @@ spcd_step__install_packages() {
     spcd_step "EPEL"
     case "${SPCD_OS_ID}" in
     "${SPCD_OS_ALMA}" | "${SPCD_OS_ROCKY}")
-        spcd_f_pm_install "epel-release"
+        spcd_install_package "epel-release"
         case "${SPCD_OS_VERSION}" in
         "9")
             set -- \
@@ -1477,32 +1450,32 @@ spcd_step__install_packages() {
     esac
     # graphviz
     spcd_step "GraphViz"
-    spcd_f_pm_install "graphviz"
+    spcd_install_package "graphviz"
     # openssh
     spcd_step "OpenSSH"
     case "${SPCD_PM}" in
     "${SPCD_PM_APK}" | "${SPCD_PM_APT}")
-        spcd_f_pm_install "openssh-client"
+        spcd_install_package "openssh-client"
         ;;
     "${SPCD_PM_DNF}" | "${SPCD_PM_ZYPPER}")
-        spcd_f_pm_install "openssh-clients"
+        spcd_install_package "openssh-clients"
         ;;
-    "${SPCD_PM_PACMAN}") spcd_f_pm_install "openssh" ;;
+    "${SPCD_PM_PACMAN}") spcd_install_package "openssh" ;;
     *) ;;
     esac
     # plantuml
     spcd_step "PlantUML"
-    spcd_f_pm_install "plantuml"
+    spcd_install_package "plantuml"
     # rsync
     spcd_step "Rsync"
-    spcd_f_pm_install "rsync"
+    spcd_install_package "rsync"
     # shell check
     spcd_step "ShellCheck"
     case "${SPCD_PM}" in
     "${SPCD_PM_DNF}" | "${SPCD_PM_ZYPPER}")
-        spcd_f_pm_install "ShellCheck"
+        spcd_install_package "ShellCheck"
         ;;
-    *) spcd_f_pm_install "shellcheck" ;;
+    *) spcd_install_package "shellcheck" ;;
     esac
     # shfmt
     spcd_step "ShellFormat"
@@ -1511,10 +1484,10 @@ spcd_step__install_packages() {
     "${SPCD_OS_DEBIAN}")
         case "${SPCD_OS_VERSION}" in
         "bullseye") ;;
-        *) spcd_f_pm_install "shfmt" ;;
+        *) spcd_install_package "shfmt" ;;
         esac
         ;;
-    *) spcd_f_pm_install "shfmt" ;;
+    *) spcd_install_package "shfmt" ;;
     esac
     spcd_step_out
 }
@@ -1575,8 +1548,8 @@ spcd_main() {
     spcd_step_in "Packages"
     spcd_step__packages_set_repositories
     spcd_step__packages_set_configuration
-    spcd_f_pm_https_trust
-    spcd_f_pm_update
+    spcd_step__packages_trust_https
+    spcd_step__packages_update_catalog
     spcd_step__packages_install_tools
     spcd_step__packages_install_locales
     spcd_step_out
@@ -1588,9 +1561,9 @@ spcd_main() {
     spcd_step_out
     # packages
     spcd_step_in "Packages"
-    spcd_f_pm_https_verify
-    spcd_f_pm_update
-    spcd_f_pm_upgrade
+    spcd_step__packages_verify_https
+    spcd_step__packages_update_catalog
+    spcd_step__packages_upgrade_system
     spcd_step__packages_install_dos2unix
     spcd_step__packages_install_git
     spcd_step_out