diff --git a/bin/miaou-bash b/bin/miaou-bash
index 3c99b84..aa4b259 100755
--- a/bin/miaou-bash
+++ b/bin/miaou-bash
@@ -581,33 +581,48 @@ function cleanup {
   rm -f "$MIAOU_BASH_ERROR"
 }
 
-## main
+function usage {
+  echo "$(basename "$0") <SCRIPT> [...SCRIPT_ARGS] | --version | --help"
+}
 
-[[ $# -lt 1 ]] && >&2 echo 'ERROR: script expected!' && builtin exit 1
+function parse_options {
+  [[ $# == 0 ]] && >&2 echo 'ERROR: script expected!' && builtin exit 2
+  [[ $# == 1 ]] && case "$1" in
+  --help) usage && builtin exit ;;
+  --version) cat "$MIAOU_BASH_DIR/.semver_git_tag" && builtin exit ;;
+  -*) >&2 echo "ERROR: option '$1' unknown!" && usage && builtin exit 2 ;;
+  esac
+  [[ $1 =~ ^- ]] && >&2 echo "ERROR: too many args $#, either single option or SCRIPT + args accepted!" && builtin exit 2
+  SCRIPT="$1"
+  [[ ! -v SCRIPT ]] && >&2 echo 'ERROR: script expected!' && builtin exit 2
+  [[ ! -f "$SCRIPT" ]] && >&2 echo "ERROR: script '$SCRIPT' not found!" && builtin exit 2
+  true
+}
+
+## main
 
 set -euo pipefail
-set -E # HALT on subshell error
-set -T # DEBUG RETURN
+set -E # HALT on pipe error
+set -T # RETURN
+
+parse_options "$@"
 build_miaou_bash_error
-BASH_ARGV0="$1" && shift # to pretend script runs by itself
 trap 'on_error $?' ERR
 trap 'on_exit $?' EXIT
 trap 'on_pipe' PIPE
 trap 'on_return' RETURN
 
-if ! is_true "$CHILD_PROCESS"; then
-  # main
-  [[ -e /proc/$$/fd/3 ]] && exec 4>&3 3>&- || exec 4>/dev/tty # swap fd 3 4 when fd 3 sent off
-  exec 3>/dev/stderr 2>"$MIAOU_BASH_ERROR"
-else
-  # any children
-  exec 4>/dev/tty 2>"$MIAOU_BASH_ERROR"
-fi
-
+BASH_ARGV0="$SCRIPT" && shift
 if is_true "$CHILD_PROCESS"; then
+  # any nested children
+  exec 4>/dev/tty 2>"$MIAOU_BASH_ERROR"
   miaou_debug "<child file=$BASH_ARGV0 pid=${BASHPID} parent=${PPID}>"
 else
+  # the MAIN Process
+  [[ -e /proc/$$/fd/3 ]] && exec 4>&3 3>&- || exec 4>/dev/tty # swap fd 3 4 when fd 3 sent off
+  exec 3>/dev/stderr 2>"$MIAOU_BASH_ERROR"
   miaou_debug "<main file=$BASH_ARGV0 pid=${BASHPID}/>"
 fi
+
 # shellcheck source=/dev/null
-source "$BASH_ARGV0"
+source "$SCRIPT"
diff --git a/test/miaou-bash.test.bash b/test/miaou-bash.test.bash
index 5cf5a1b..896735f 100755
--- a/test/miaou-bash.test.bash
+++ b/test/miaou-bash.test.bash
@@ -13,9 +13,29 @@ function assert {
     failures+=("$1")
     return 1
   fi
-
 }
 
+# assert performing '$1:script' successfully + output must contain '$2:content'
+# in case of extra args (4th position or more) must be provided after -- (3rd position)
+# 1: script
+# 2: content
+# 3: --
+# 4..: extra args
+function assert_grep {
+  ((test_count++))
+  local script="$1" content="$2" extra_args=()
+  [[ $# -gt 3 ]] && shift 3 && extra_args=("$@")
+
+  if miaou-bash ./test/stub/scenario.bash "$script" "${extra_args[@]}" >_stdout 2>/dev/null 3>/dev/null; then
+    if grep -q "$content" _stdout; then
+      echo -n .
+      return
+    fi
+  fi
+  echo -n F
+  failures+=("$script")
+  return 1
+}
 function fail_type {
   ((test_count++))
   local success regex hint_message
@@ -52,6 +72,8 @@ test_count=0
 failures=()
 
 assert success
+assert_grep success_with_args 'count args: 2' -- 'A B' C
+
 fail_type subshell_term SUBSHELL_ERROR
 fail_type unbound_variable UNBOUND_VARIABLE
 fail_type unbound_associative UNBOUND_VARIABLE
diff --git a/test/stub/scenario.bash b/test/stub/scenario.bash
index bb61bf0..2c4c613 100755
--- a/test/stub/scenario.bash
+++ b/test/stub/scenario.bash
@@ -3,7 +3,6 @@
 # CONSTANTS
 
 BASEDIR=$(dirname "$0")
-# readonly BASEDIR
 
 # SCENARII
 
@@ -71,11 +70,16 @@ function do_false {
 }
 
 function do_success {
+  echo "count args: $#"
   [[ true==true ]] && echo true
   ! false && echo unfalse
   return
 }
 
+function do_success_with_args {
+  echo "count args: $#"
+}
+
 function do_unbound_variable {
   a=5
   echo "a=${a}"
@@ -203,5 +207,5 @@ if test_contain_item SCENARII "$scenario"; then
   shift
   "do_${scenario}" "$@"
 else
-  (>&2 echo "scenario <${scenario}> not found!" && usage && exit 2)
+  (>&2 echo "scenario '${scenario}' not found!" && usage && exit 2)
 fi