history.add(LlmMessage.assistant("A3"));
        history.add(LlmMessage.user("Q4"));
        history.add(LlmMessage.assistant("A4"));
        final LlmChatRequest request = client.testBuildIntentRequest("Q5", history);
        final List<LlmMessage> messages = request.getMessages();
        // system + 6 history (last 6: Q2,A2,Q3,A3,Q4,A4) + user = 8 messages
        assertEquals(8, messages.size());