diff --git a/runner/runner.sh b/runner/runner.sh
new file mode 100755
index 0000000..440e102
--- /dev/null
+++ b/runner/runner.sh
@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+set -e
+
+SCRIPT=$(realpath -- "$1")
+cd -- "$(dirname -- "$SCRIPT")"
+
+_CISH_STARTED=false
+
+function _cish_on_command() {
+	_CISH_EXIT_CODE=$?
+
+	# we don't wanna handle subscripts or commands originating from the debug trap
+	if [[ "${BASH_SOURCE[1]}" != "$SCRIPT" ]]; then
+		return
+	fi
+	if [[ "$_CISH_STARTED" == true ]]; then
+		echo "exit code: $_CISH_EXIT_CODE"
+	fi
+	_CISH_STARTED=true
+	echo "${BASH_SOURCE[1]}:${BASH_LINENO[0]}  $BASH_COMMAND"
+}
+
+function _cish_on_error() {
+	_CISH_VALID_EXIT_CODE=$?
+	_cish_on_command
+	exit "$_CISH_VALID_EXIT_CODE"
+}
+
+shopt -s extdebug
+trap _cish_on_command DEBUG
+trap _cish_on_error ERR
+
+# shellcheck source=/dev/null
+source "$SCRIPT"