Update agent.py

agent.py

@@ -462,6 +462,12 @@ class BERTopicAgent:
             streaming=True,
         )
         self._memory    = MemorySaver()
+
+        # handle_tool_error is no longer a @tool() decorator argument in
+        # newer LangChain versions — set it directly on each tool object.
+        for t in TOOLS:
+            t.handle_tool_error = True
+
         self._graph     = create_react_agent(
             model=self._llm,
             tools=TOOLS,
@@ -650,4 +656,4 @@ class BERTopicAgent:
             self.phase,
             dict(self._charts),
             list(self._downloads),
-        )
+        )