diff --git a/.github/workflows/style.yml b/.github/workflows/style.yml
index 8860a24fe594..ddea2a7493ae 100644
--- a/.github/workflows/style.yml
+++ b/.github/workflows/style.yml
@@ -8,7 +8,7 @@ name: Style Checker
 
 on:
   pull_request: # maybe pull_request_target
-    branches: [ main ]
+    branches: [ dev ]
     types: [ opened, reopened, edited, synchronize ]
 
 permissions:
@@ -31,4 +31,4 @@ jobs:
       - name: Run checker
         run: |
           sha=$(git merge-base ${{ github.event.pull_request.base.sha }} ${{ github.event.pull_request.head.sha }})
-          tools/build/checkstyle9.pl ${sha}..${{ github.event.pull_request.head.sha }}
+          git diff ${sha}..${{ github.event.pull_request.head.sha }} | tools/build/checkstyle9.pl --github - || true
diff --git a/tools/build/checkstyle9.pl b/tools/build/checkstyle9.pl
index 8b30baa10fc9..df9ec2bbd7c1 100755
--- a/tools/build/checkstyle9.pl
+++ b/tools/build/checkstyle9.pl
@@ -25,6 +25,7 @@
 my $chk_branch = undef;
 my $tst_only;
 my $emacs = 0;
+my $github = 0;
 my $terse = 0;
 my $file = undef;
 my $color = "auto";
@@ -91,6 +92,7 @@ sub help {
 	'patch!'	=> \$chk_patch,
 	'branch!'	=> \$chk_branch,
 	'emacs!'	=> \$emacs,
+	'github!'	=> \$github,
 	'terse!'	=> \$terse,
 	'f|file!'	=> \$file,
 	'strict!'	=> \$no_warnings,
@@ -1173,13 +1175,17 @@ sub report {
 	}
 
 	my $output = '';
-	$output .= BOLD if $color;
+	my $do_color = $color && !$github;
+	$output .= BOLD if $do_color;
+	$output .= "::error " if $github && $level eq 'ERROR';
+	$output .= "::warning " if $github && $level eq 'WARNING';
 	$output .= $prefix;
-	$output .= RED if $color && $level eq 'ERROR';
-	$output .= MAGENTA if $color && $level eq 'WARNING';
-	$output .= $level . ':';
-	$output .= RESET if $color;
-	$output .= ' ' . $msg . "\n";
+	$output .= RED if $do_color && $level eq 'ERROR';
+	$output .= MAGENTA if $do_color && $level eq 'WARNING';
+	$output .= $level . ':' if !$github;
+	$output .= RESET if $do_color;
+	$output .= ' ' if (!$github);
+	$output .= $msg . "\n";
 
 	$output = (split('\n', $output))[0] . "\n" if ($terse);
 
@@ -1395,6 +1401,8 @@ sub process {
 #make up the handle for any error we report on this line
 		$prefix = "$filename:$realline: " if ($emacs && $file);
 		$prefix = "$filename:$linenr: " if ($emacs && !$file);
+		$prefix = "file=$filename,line=$realline:\:" if ($github && $file);
+		$prefix = "file=$realfile,line=$realline:\:" if ($github && !$file);
 
 		$here = "#$linenr: " if (!$file);
 		$here = "#$realline: " if ($file);