diff --git a/readme.md b/readme.md
index 5c32038..736eedb 100644
--- a/readme.md
+++ b/readme.md
@@ -255,7 +255,6 @@ Handle project workflows in a unified way:
   * venv
     * create
     * activate
-* query package
 * relay environment module name
 
 #### Python
diff --git a/spcd/bootstrap.sh b/spcd/bootstrap.sh
index 70a3673..c80c600 100644
--- a/spcd/bootstrap.sh
+++ b/spcd/bootstrap.sh
@@ -27,10 +27,9 @@ _SPCD_BANNER_VERTICAL="│"
 
 _spcd_banner_add() {
     if [ -n "${1}" ]; then
-        local text length filler
-        text=" ${1} "
-        length=${#text}
-        filler="$(_spcd_fill "${length}" "${_SPCD_BANNER_HORIZONTAL}")"
+        local text=" ${1} "
+        local length=${#text}
+        local filler="$(_spcd_fill "${length}" "${_SPCD_BANNER_HORIZONTAL}")"
         if [ -n "${__SPCD_BANNER_MIDDLE}" ]; then
             _spcd_banner_split
         else
@@ -300,10 +299,10 @@ spcd_split() {
 spcd_step() {
     if [ -n "${1}" ]; then
         [ -n "${__SPCD_STEP_LEVEL}" ] || __SPCD_STEP_LEVEL=1
-        local prefix="__SPCD_STEP_${__SPCD_STEP_LEVEL}"
-        local index="${prefix}_INDEX"
-        eval "${index}=\$((${index} + 1))"
-        eval "${prefix}_LABEL=\"${1}\""
+        spcd_step__prefix="__SPCD_STEP_${__SPCD_STEP_LEVEL}"
+        spcd_step__index="${spcd_step__prefix}_INDEX"
+        eval "${spcd_step__index}=\$((${spcd_step__index} + 1))"
+        eval "${spcd_step__prefix}_LABEL=\"${1}\""
         _spcd_banner_render
     fi
 }
@@ -335,14 +334,12 @@ spcd_txt_get() {
 
 spcd_txt_locale() {
     # LANGUAGE
-    local name
-    local value
     if [ -n "${1}" ]; then
-        value="${1}"
+        spcd_step__locale__value="${1}"
     else
-        value="${_SPCD_TXT_LOCALE_DEFAULT}"
+        spcd_step__locale__value="${_SPCD_TXT_LOCALE_DEFAULT}"
     fi
-    value="${value}.${_SPCD_TXT_CHARSET}"
+    spcd_step__locale__value="${spcd_step__locale__value}.${_SPCD_TXT_CHARSET}"
     set -- \
         "LANG" \
         "LC_CTYPE" \
@@ -357,8 +354,8 @@ spcd_txt_locale() {
         "LC_TELEPHONE" \
         "LC_MEASUREMENT" \
         "LC_IDENTIFICATION"
-    for name in "${@}"; do
-        export "${name}=${value}"
+    for spcd_step__locale__name in "${@}"; do
+        export "${spcd_step__locale__name}=${spcd_step__locale__value}"
     done
 }
 
@@ -411,14 +408,11 @@ spcd_step__environment_defaults_print() {
         "URL_PYTHON" \
         "URL_ROCKY" \
         "URL_UBUNTU"
-    local item
-    local name
-    local value
-    for item in "${@}"; do
-        name="SPCD_${item}"
-        eval "value=\"\${${name}}\""
-        if [ -n "${value}" ]; then
-            spcd_os_printenv "${name}"
+    for spcd_step_edp__item in "${@}"; do
+        spcd_step_edp__name="SPCD_${spcd_step_edp__item}"
+        eval "spcd_step_edp__value=\"\${${spcd_step_edp__name}}\""
+        if [ -n "${spcd_step_edp__value}" ]; then
+            spcd_os_printenv "${spcd_step_edp__name}"
         fi
     done
 }
@@ -756,7 +750,8 @@ ${SPCD_PYTHON_VENV}/lib/${SPCD_PYTHON_COMMAND}/site-packages"
 
 spcd_step__environment_list_workspace() {
     spcd_step "List workspace"
-    spcd_os_ls "$(realpath .)"
+    spcd_lwd__path="$(realpath .)"
+    spcd_os_ls "${spcd_lwd__path}"
 }
 
 # ╭──────┬───────────╮
@@ -776,12 +771,11 @@ spcd_clean_cache() {
 
 spcd_git_clone() {
     if [ -n "${1}" ]; then
-        local name path url
-        name="$(basename "${1}")"
-        path="${SPCD_DL}/${name}"
-        url="$(spcd_git_url "${1}")"
-        git clone "${url}" "${path}"
-        echo "${path}"
+        spcd_gc__name="$(basename "${1}")"
+        spcd_gc__path="${SPCD_DL}/${spcd_gc__name}"
+        spcd_gc__url="$(spcd_git_url "${1}")"
+        git clone "${spcd_gc__url}" "${spcd_gc__path}"
+        echo "${spcd_gc__path}"
     fi
 }
 
@@ -819,23 +813,22 @@ spcd_install_package() {
 }
 
 spcd_python_ln() {
-    local command="${1}"
-    if [ -n "${command}" ]; then
-        echo "→ ${SPCD_PYTHON_ALIAS} → ${command}"
-        ln -f -s "${command}" \
+    spcd_python_ln__command="${1}"
+    if [ -n "${spcd_python_ln__command}" ]; then
+        echo "→ ${SPCD_PYTHON_ALIAS} → ${spcd_python_ln__command}"
+        ln -f -s "${spcd_python_ln__command}" \
             "/usr/bin/${SPCD_PYTHON_ALIAS}"
     fi
 }
 
 spcd_python_pip() {
     if [ -n "${1}" ]; then
-        local name path target
-        name="$(basename "${1}")"
-        path="$(spcd_git_clone "${1}")"
-        path="${path}/${name}"
-        target="${SPCD_PYTHON_VENV_PACKAGES}"
-        cp --recursive "${path}" "${target}"
-        echo "${target}/${name}"
+        spcd_pp__name="$(basename "${1}")"
+        spcd_pp__path="$(spcd_git_clone "${1}")"
+        spcd_pp__path="${spcd_pp__path}/${spcd_pp__name}"
+        spcd_pp__target="${SPCD_PYTHON_VENV_PACKAGES}"
+        cp --recursive "${spcd_pp__path}" "${spcd_pp__target}"
+        echo "${spcd_pp__target}/${spcd_pp__name}"
     fi
 }
 
@@ -856,16 +849,15 @@ spcd_query_package() {
 
 spcd_step__dns() {
     spcd_step "DNS"
-    local index value text
     while true; do
-        index=$((index + 1))
-        eval "value=\"\${SPCD_DNS_${index}}\""
-        [ -n "${value}" ] || break
-        text="${text}\
-nameserver ${value}
+        spcd_sdr__index=$((spcd_sdr__index + 1))
+        eval "spcd_sdr__value=\"\${SPCD_DNS_${spcd_sdr__index}}\""
+        [ -n "${spcd_sdr__value}" ] || break
+        spcd_sdr__text="${spcd_sdr__text}\
+nameserver ${spcd_sdr__value}
 "
     done
-    spcd_os_write "/etc/resolv.conf" "${text}"
+    spcd_os_write "/etc/resolv.conf" "${spcd_sdr__text}"
 }
 
 # ╭──────┬──────────╮
@@ -874,7 +866,6 @@ nameserver ${value}
 
 spcd_step__packages_set_repositories() {
     spcd_step "Set repositories"
-    local file
     case "${SPCD_OS_ID}" in
     "${SPCD_OS_ALMA}")
         case "${SPCD_OS_VERSION}" in
@@ -906,8 +897,8 @@ spcd_step__packages_set_repositories() {
             ;;
         *) ;;
         esac
-        for file in "${@}"; do
-            spcd_os_sed "/etc/yum.repos.d/almalinux${file}.repo" \
+        for spcd_spr__file in "${@}"; do
+            spcd_os_sed "/etc/yum.repos.d/almalinux${spcd_spr__file}.repo" \
                 "|^mirrorlist|#mirrorlist|" \
                 "|https://repo.almalinux.org|${SPCD_URL_ALMA}|" \
                 "|^# baseurl|baseurl|"
@@ -937,14 +928,14 @@ deb ${SPCD_URL_DEBIAN}-security ${SPCD_OS_VERSION}-security main
             "-updates-testing" \
             "-updates" \
             ""
-        for file in "${@}"; do
-            spcd_os_sed "/etc/yum.repos.d/fedora${file}.repo" \
+        for spcd_spr__file in "${@}"; do
+            spcd_os_sed "/etc/yum.repos.d/fedora${spcd_spr__file}.repo" \
                 "|^metalink|#metalink|" "\
 |http://download.example/pub/fedora/linux|${SPCD_URL_FEDORA}|" \
                 "|^#baseurl|baseurl|"
         done
         spcd_os_sed "/etc/yum.repos.d/fedora-cisco-openh264.repo" \
-            "|^enabled=1|enabled=0|"
+            "|^enabled=1|#enabled=0|"
         ;;
     "${SPCD_OS_OPENSUSE}")
         set -- \
@@ -961,12 +952,12 @@ deb ${SPCD_URL_DEBIAN}-security ${SPCD_OS_VERSION}-security main
             "source" \
             "update-non-oss" \
             "update"
-        for file in "${@}"; do
-            spcd_os_sed "/etc/zypp/repos.d/repo-${file}.repo" \
+        for spcd_spr__file in "${@}"; do
+            spcd_os_sed "/etc/zypp/repos.d/repo-${spcd_spr__file}.repo" \
                 "|http://download.opensuse.org|${SPCD_URL_OPENSUSE}|"
         done
         spcd_os_sed "/etc/zypp/repos.d/repo-openh264.repo" \
-            "|^enabled=1|enabled=0|"
+            "|^enabled=1|#enabled=0|"
         ;;
     "${SPCD_OS_ROCKY}")
         case "${SPCD_OS_VERSION}" in
@@ -995,8 +986,8 @@ deb ${SPCD_URL_DEBIAN}-security ${SPCD_OS_VERSION}-security main
             ;;
         *) ;;
         esac
-        for file in "${@}"; do
-            spcd_os_sed "/etc/yum.repos.d/${file}.repo" \
+        for spcd_spr__file in "${@}"; do
+            spcd_os_sed "/etc/yum.repos.d/${spcd_spr__file}.repo" \
                 "|^mirrorlist|#mirrorlist|" \
                 "|http://dl.rockylinux.org|${SPCD_URL_ROCKY}|" \
                 "|^#baseurl|baseurl|"
@@ -1054,29 +1045,28 @@ Dir::Etc::SourceParts \"\";
 
 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 "${path}")"
+        spcd_pth__path="$(spcd_https_path)"
+        if [ -n "${spcd_pth__path}" ]; then
+            spcd_os_mkdir "$(dirname "${spcd_pth__path}")"
             case "${SPCD_PM}" in
-            "${SPCD_PM_APK}") text="\
+            "${SPCD_PM_APK}") spcd_pth__text="\
 --no-verify
 " ;;
-            "${SPCD_PM_APT}") text="\
+            "${SPCD_PM_APT}") spcd_pth__text="\
 Acquire::https::Verify-Peer False;
 " ;;
-            "${SPCD_PM_DNF}") text="\
+            "${SPCD_PM_DNF}") spcd_pth__text="\
 sslverify=False
 " ;;
-            "${SPCD_PM_PACMAN}") text="\
+            "${SPCD_PM_PACMAN}") spcd_pth__text="\
 SSLVerify = No
 " ;;
             "${SPCD_PM_ZYPPER}") ;;
             *) ;;
             esac
-            [ -n "${text}" ] &&
-                spcd_os_write "${path}" "${text}"
+            [ -n "${spcd_pth__text}" ] &&
+                spcd_os_write "${spcd_pth__path}" "${spcd_pth__text}"
         fi
     fi
 }
@@ -1112,31 +1102,30 @@ spcd_step__ca_install_package() {
 
 spcd_step__ca_write_certificates() {
     spcd_step "Write certificates"
-    local root index text path
     case "${SPCD_OS_ID}" in
     "${SPCD_OS_ALMA}" | "${SPCD_OS_FEDORA}" | "${SPCD_OS_ROCKY}")
-        root="/etc/pki/ca-trust/source/anchors"
+        spcd_wcc__root="/etc/pki/ca-trust/source/anchors"
         ;;
     "${SPCD_OS_ALPINE}" | "${SPCD_OS_DEBIAN}" | "${SPCD_OS_UBUNTU}")
-        root="/usr/local/share/ca-certificates"
+        spcd_wcc__root="/usr/local/share/ca-certificates"
         ;;
     "${SPCD_OS_ARCH}")
-        root="/etc/ca-certificates/trust-source/anchors"
+        spcd_wcc__root="/etc/ca-certificates/trust-source/anchors"
         ;;
     "${SPCD_OS_OPENSUSE}")
-        root="/etc/pki/trust/anchors"
+        spcd_wcc__root="/etc/pki/trust/anchors"
         ;;
     *) ;;
     esac
-    spcd_os_mkdir "${root}"
+    spcd_os_mkdir "${spcd_wcc__root}"
     while true; do
-        index=$((index + 1))
-        eval "text=\"\${SPCD_CA_${index}}\""
-        [ -n "${text}" ] || break
-        path="${root}/${index}.crt"
+        spcd_wcc__index=$((spcd_wcc__index + 1))
+        eval "spcd_wcc__text=\"\${SPCD_CA_${spcd_wcc__index}}\""
+        [ -n "${spcd_wcc__text}" ] || break
+        spcd_wcc__path="${spcd_wcc__root}/${spcd_wcc__index}.crt"
         spcd_split
-        spcd_os_write "${path}" "${text}"
-        spcd_openssl_x509 "${path}"
+        spcd_os_write "${spcd_wcc__path}" "${spcd_wcc__text}"
+        spcd_openssl_x509 "${spcd_wcc__path}"
     done
 }
 
@@ -1165,10 +1154,9 @@ spcd_step__ca_update_certificates() {
 
 spcd_step__packages_verify_https() {
     spcd_step "Verify HTTPS"
-    local path
-    path="$(spcd_https_path)"
-    if [ -n "${path}" ]; then
-        spcd_os_rm "${path}"
+    spcd_pvh__path="$(spcd_https_path)"
+    if [ -n "${spcd_pvh__path}" ]; then
+        spcd_os_rm "${spcd_pvh__path}"
     fi
 }
 
@@ -1180,20 +1168,21 @@ spcd_step__packages_install_locales() {
     case "${SPCD_PM}" in
     "${SPCD_PM_APK}") spcd_install_package "musl-locales" ;;
     "${SPCD_PM_APT}")
-        local locale text
-        for locale in "${@}"; do
-            text="${text}\
-${locale}.${_SPCD_TXT_CHARSET} ${_SPCD_TXT_CHARSET}
+        unset spcd_step__pil__text
+        for spcd_step__pil__locale in "${@}"; do
+            spcd_step__pil__text="${spcd_step__pil__text}\
+${spcd_step__pil__locale}.${_SPCD_TXT_CHARSET} ${_SPCD_TXT_CHARSET}
 "
         done
-        spcd_os_write "/etc/locale.gen" "${text}"
+        spcd_os_write "/etc/locale.gen" "${spcd_step__pil__text}"
         spcd_install_package "locales"
         ;;
     "${SPCD_PM_DNF}")
-        local locale language
-        for locale in "${@}"; do
-            language="$(echo "${locale}" | cut -d _ -f 1)"
-            spcd_install_package "glibc-langpack-${language}"
+        for spcd_step__pil__locale in "${@}"; do
+            spcd_step__pil__lang="$(
+                echo "${spcd_step__pil__locale}" | cut -d _ -f 1
+            )"
+            spcd_install_package "glibc-langpack-${spcd_step__pil__lang}"
         done
         ;;
     "${SPCD_PM_PACMAN}") spcd_install_package "glibc-locales" ;;
@@ -1258,33 +1247,31 @@ index-url = ${SPCD_URL_PYTHON}/simple
 
 spcd_step__python_modules() {
     spcd_step_in "Modules"
-    local target path script check
-    target="${SPCD_PYTHON_VENV_PACKAGES}"
+    spcd_ipm__target="${SPCD_PYTHON_VENV_PACKAGES}"
     spcd_step "List"
-    spcd_os_ls "${target}"
+    spcd_os_ls "${spcd_ipm__target}"
     spcd_step "Main"
-    path="$(spcd_python_pip "${SPCD_GIT_SPCD}")"
+    spcd_ipm__path="$(spcd_python_pip "${SPCD_GIT_SPCD}")"
     # check matching of file and variable
     spcd_step "Check"
-    script="${path}/bootstrap.sh"
-    ls -l "${script}"
-    check="${script}.${SPCD_CMD_SUM}"
-    "${SPCD_CMD_SUM}" "${script}" >"${check}"
-    printf "%s" "${SPCD}" >"${script}"
-    ls -l "${script}"
-    dos2unix "${script}"
-    ls -l "${script}"
-    "${SPCD_CMD_SUM}" -c "${check}" || spcd_error_ci "SPCD"
+    spcd_ipm__script="${spcd_ipm__path}/bootstrap.sh"
+    ls -l "${spcd_ipm__script}"
+    spcd_ipm__check="${spcd_ipm__script}.${SPCD_CMD_SUM}"
+    "${SPCD_CMD_SUM}" "${spcd_ipm__script}" >"${spcd_ipm__check}"
+    printf "%s" "${SPCD}" >"${spcd_ipm__script}"
+    ls -l "${spcd_ipm__script}"
+    dos2unix "${spcd_ipm__script}"
+    ls -l "${spcd_ipm__script}"
+    "${SPCD_CMD_SUM}" -c "${spcd_ipm__check}" || spcd_error_ci "SPCD"
     spcd_step "Root"
     spcd_python_pip "${SPCD_GIT_RWX}"
     spcd_step "List"
-    spcd_os_ls "${target}"
+    spcd_os_ls "${spcd_ipm__target}"
     spcd_step_out
 }
 
 spcd_step__install_packages() {
     spcd_step_in "OS packages"
-    local file
     # epel
     spcd_step "EPEL"
     case "${SPCD_OS_ID}" in
@@ -1305,16 +1292,16 @@ spcd_step__install_packages() {
             ;;
         *) ;;
         esac
-        for file in "${@}"; do
-            spcd_os_sed "/etc/yum.repos.d/epel${file}.repo" \
+        for spcd_spr__file in "${@}"; do
+            spcd_os_sed "/etc/yum.repos.d/epel${spcd_spr__file}.repo" \
                 "|^metalink|#metalink|" \
                 "|https://download.example/pub/epel|${SPCD_URL_EPEL}|" \
                 "|^#baseurl|baseurl|"
         done
-        file="/etc/yum.repos.d/epel-cisco-openh264.repo"
+        spcd_spr__file="/etc/yum.repos.d/epel-cisco-openh264.repo"
         if [ -f "${spcd_spr__file}" ]; then
-            spcd_os_sed "${file}" \
-                "|^enabled=1|enabled=0|"
+            spcd_os_sed "${spcd_spr__file}" \
+                "|^enabled=1|#enabled=0|"
         fi
         ;;
     *) ;;
@@ -1365,42 +1352,48 @@ spcd_step__install_packages() {
 
 spcd_step__python_write_module() {
     spcd_step "Write module"
-    local variable value text index root
-    for variable in \
+    for spcd_wpm__variable in \
         OS_ID OS_VERSION \
         PROJECT_ROOT PROJECT_PATH PROJECT_NAME \
         PYTHON_VENV_BINARIES PYTHON_VENV_PACKAGES \
         OPEN DOWN VERT SPLT __UP SHUT; do
-        value="$(spcd_os_printenv "SPCD_${variable}")"
-        text="${text}${value}
+        spcd_wpm__value="$(spcd_os_printenv "SPCD_${spcd_wpm__variable}")"
+        spcd_wpm__text="${spcd_wpm__text}${spcd_wpm__value}
 "
     done
-    index=$((__SPCD_STEP_1_INDEX + 1))
-    for root in \
+    spcd_wpm__index=$((__SPCD_STEP_1_INDEX + 1))
+    for spcd_wpm__root in \
         "${SPCD_PYTHON_PACKAGES}" "${SPCD_PYTHON_VENV_PACKAGES}"; do
-        spcd_os_write "${root}/env.py" "${text}
-SPCD_STEP = ${index}
+        spcd_os_write "${spcd_wpm__root}/env.py" "${spcd_wpm__text}
+SPCD_STEP = ${spcd_wpm__index}
 "
     done
 }
 
 spcd_step__python_switch() {
     spcd_step "Switch"
-    local name path
-    name="$(basename "${SPCD_GIT_SPCD}")"
-    path="$(realpath "${0}")"
+    spcd_stp__name="$(basename "${SPCD_GIT_SPCD}")"
+    spcd_stp__path="$(realpath "${0}")"
     echo "\
-${path}
+${spcd_stp__path}
 ↓
-${SPCD_PYTHON_ALIAS} / ${name}"
-    "${SPCD_PYTHON_ALIAS}" -m "${name}"
+${SPCD_PYTHON_ALIAS} / ${spcd_stp__name}"
+    "${SPCD_PYTHON_ALIAS}" -m "${spcd_stp__name}"
 }
 
 # ╭──────╮
 # │ main │
 # ╰──────╯
 
+spcd_test_local() {
+    local local_variable="KO!"
+    non_local_variable="OK"
+}
+
 spcd_main() {
+    spcd_test_local
+    echo "local_variable = \"${local_variable}\""
+    echo "non_local_variable = \"${non_local_variable}\""
     # environment
     spcd_txt_locale
     #