From a40b0a82c4aeb642223ed7e6a7cabf5ca0acd881 Mon Sep 17 00:00:00 2001
From: Timo <mailantimo@gmx.de>
Date: Fri, 16 Jan 2026 09:42:14 +0000
Subject: [PATCH] chore: Limit checkstyle to version 12.x

Checkstyle 13+ requires Java 21. Configure Renovate to only
allow versions below 13 to stay compatible with Java 17.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---
 renovate.json | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/renovate.json b/renovate.json
index 8c7dea8d5e5..06e4cd5fe60 100644
--- a/renovate.json
+++ b/renovate.json
@@ -28,6 +28,13 @@
         "spring-boot-admin"
       ],
       "enabled": false
+    },
+    {
+      "description": "Checkstyle 13+ requires Java 21, stay on 12.x",
+      "matchPackageNames": [
+        "com.puppycrawl.tools:checkstyle"
+      ],
+      "allowedVersions": "<13"
     }
   ]
 }