diff --git a/backend/app/services/chat_service.py b/backend/app/services/chat_service.py
index 7000179..a7708b1 100644
--- a/backend/app/services/chat_service.py
+++ b/backend/app/services/chat_service.py
@@ -40,7 +40,8 @@ RULES:
 8. Be concise — short answers are better than long ones.
 9. When the user says "beliebig", "any", "random", "irgendein" — just pick one yourself, don't ask back.
 10. Material system: Materials have SCHAEFFLER library names (e.g. SCHAEFFLER_020101_Durotect-Blue). Common names like "Durotect", "Stahl", "Bronze" are aliases that map to these library names. When the user asks for a material by a common name, use list_materials to find the correct SCHAEFFLER name, then use that for material_override.
-11. When setting material_override, always use the full SCHAEFFLER library name (e.g. SCHAEFFLER_020101_Durotect-Blue), never the alias."""
+11. When setting material_override, always use the full SCHAEFFLER library name (e.g. SCHAEFFLER_020101_Durotect-Blue), never the alias.
+12. When mentioning a product, ALWAYS link to it: [ProductName](/products/UUID). When mentioning an order, link to it: [OrderNumber](/orders/UUID). This makes the response navigable."""
 
 # ── Tool definitions (OpenAI function-calling schema) ────────────────────────