Fix retrieval bot

backend/app/retrieval.py

@@ -1,4 +1,4 @@
-import json
+from uuid import uuid4
 
 from langchain_core.language_models.base import LanguageModelLike
 from langchain_core.messages import AIMessage, HumanMessage, SystemMessage
@@ -69,35 +69,38 @@ async def get_search_query(messages):
         conversation = "\n".join(convo)
         prompt = await search_prompt.ainvoke({"conversation": conversation})
         response = await llm.ainvoke(prompt)
-        return response.content
+        return response
 
     async def invoke_retrieval(messages):
         if len(messages) == 1:
             human_input = messages[-1].content
             return AIMessage(
                 content="",
-                additional_kwargs={
-                    "function_call": {
+                tool_calls=[
+                    {
+                        "id": uuid4().hex,
                         "name": "retrieval",
-                        "arguments": json.dumps({"query": human_input}),
+                        "args": {"query": human_input},
                     }
-                },
+                ],
             )
         else:
             search_query = await get_search_query.ainvoke(messages)
             return AIMessage(
+                id=search_query.id,
                 content="",
-                additional_kwargs={
-                    "function_call": {
+                tool_calls=[
+                    {
+                        "id": uuid4().hex,
                         "name": "retrieval",
-                        "arguments": json.dumps({"query": search_query}),
+                        "args": {"query": search_query.content},
                     }
-                },
+                ],
             )
 
     async def retrieve(messages):
-        params = messages[-1].additional_kwargs["function_call"]
-        query = json.loads(params["arguments"])["query"]
+        params = messages[-1].tool_calls[0]
+        query = params["args"]["query"]
         response = await retriever.ainvoke(query)
         msg = LiberalFunctionMessage(name="retrieval", content=response)
         return msg