diff --git a/app/core/chunk_payload.py b/app/core/chunk_payload.py
index 5676190..74e3d29 100644
--- a/app/core/chunk_payload.py
+++ b/app/core/chunk_payload.py
@@ -27,7 +27,19 @@ Lizenz: MIT (projektintern)
 """
 from __future__ import annotations
 
+
+def _overlap_from_frontmatter(frontmatter: Dict[str, Any], fallback: Tuple[int,int]) -> Tuple[int,int]:
+    prof = str(frontmatter.get("chunk_profile") or "").strip().lower()
+    if prof:
+        try:
+            return profile_overlap(prof)
+        except Exception:
+            return fallback
+    return fallback
+
+
 from typing import Any, Dict, Iterable, List, Optional, Tuple, Union
+from app.core.type_registry import profile_overlap
 
 try:
     # Typgerechtes Overlap aus deiner Konfiguration holen