Warn and drop empty messages when format messages for Anthropic

Log dropped empty messages to debug this unexpected state.

Related 0eb2d17

src/khoj/processor/conversation/anthropic/utils.py

@@ -276,6 +276,11 @@ def format_messages_for_anthropic(messages: list[ChatMessage], system_prompt: st
                     )
             message.content = content
 
+        if is_none_or_empty(message.content):
+            logger.error(f"Drop message with empty content as not supported:\n{message}")
+            messages.remove(message)
+            continue
+
     formatted_messages: List[anthropic.types.MessageParam] = [
         anthropic.types.MessageParam(role=message.role, content=message.content) for message in messages
     ]

src/khoj/processor/conversation/google/utils.py

@@ -305,7 +305,7 @@ def format_messages_for_gemini(
                 else:
                     logger.error(f"Dropping invalid message content part: {item}")
             if not message_content:
-                logger.error(f"Dropping empty message content")
+                logger.error(f"Dropping message with empty content as not supported:\n{message}")
                 messages.remove(message)
                 continue
             message.content = message_content