diff --git a/tools/core_connectivity/check_style.sh b/tools/core_connectivity/check_style.sh
new file mode 100755
index 0000000..29614e0
--- /dev/null
+++ b/tools/core_connectivity/check_style.sh
@@ -0,0 +1,40 @@
+#!/bin/bash
+#VERSION=1
+
+SELFNAME=$0
+
+function getAbsolutePath() {
+    readlink -e $1
+}
+
+function printUsage() {
+    echo "  $SELFNAME             check coding style for HEAD in this git"
+    echo "  $SELFNAME -h          show this message"
+}
+
+function main() {
+    test "$1" == "-h" && printUsage && exit
+    test "$ANDROID_BUILD_TOP" == "" && echo "please run env setup" && exit
+    GITROOTDIR=`git rev-parse --show-toplevel`
+    test "$GITROOTDIR" == "" && echo "not inside a git repository" && exit
+    MODIFIED=`git status -s --untracked-files=no | wc -l`
+    test $MODIFIED -ne 0 && echo "please commit first" && exit
+
+    cd $GITROOTDIR
+
+    #basic check
+    local PARAMS=" --config_xml $ANDROID_BUILD_TOP/prebuilts/checkstyle/android-style.xml"
+    $ANDROID_BUILD_TOP/prebuilts/checkstyle/checkstyle.py $PARAMS
+
+    #commit message equal or less then 65 char for each line (suggested by lorenzo@20180625)
+    local MSG=`git rev-list --format=%B --max-count=1 HEAD`
+    local i=1
+    while read -r line; do
+        test `echo $line | wc -c` -gt 65 && echo "FAILED: Line $i exceed 65 chars limit: $line"
+        i=$((i+1))
+    done < <(echo "$MSG")
+
+    cd -
+}
+
+main $*