diff --git a/app/plugins/builtins/ai_assistant/participant_handler.py b/app/plugins/builtins/ai_assistant/participant_handler.py
index e45ae8f..2091056 100644
--- a/app/plugins/builtins/ai_assistant/participant_handler.py
+++ b/app/plugins/builtins/ai_assistant/participant_handler.py
@@ -52,6 +52,8 @@ class AIParticipantHandler(ParticipantHandler):
         # Check if AI is mentioned or it's a direct chat with only user + ai
         ai_mentioned = "KI" in mentions or "ai" in mentions
         is_direct = conversation.get("is_direct", False)
+        is_locked = conversation.get("is_locked", False)
+        locked_by = conversation.get("locked_by", "")
 
         if is_direct:
             # For direct chats, check that only user and ai are participants
@@ -62,6 +64,10 @@ class AIParticipantHandler(ParticipantHandler):
             if len(non_system_participants) <= 2:
                 ai_mentioned = True
 
+        # Plugin rooms (locked by ai_assistant) are always AI-active
+        if is_locked and locked_by == "ai_assistant":
+            ai_mentioned = True
+
         if not ai_mentioned:
             return None