Try this

.github/workflows/cs.yml

@@ -86,12 +86,15 @@ jobs:
           echo "EXITCODE=$exitcode" >> $GITHUB_OUTPUT
           exit "$exitcode"
 
+      - name: DEBUG
+        run: echo echo ${{ steps.thresholds.outputs.EXITCODE }}
+
       # Check the codestyle only of the files which were changed in the current branch.
       # This step will only be executed if the threshold check exited with a failure status.
       # The results of this CS check will be shown inline in the PR via the CS2PR tool.
       # @link https://github.com/staabm/annotate-pull-request-from-checkstyle/
       - name: Check PHP code style for the changes made in the branch only
-        if: ${{ failure() && steps.thresholds.outputs.EXITCODE == 128 }}
+        if: ${{ failure() && steps.thresholds.outputs.EXITCODE == "128" }}
         id: phpcs
         run: composer check-branch-cs -- ${{ steps.base_branch.outputs.REF }}