// Head (300) + omitted marker + tail (200) + source titles
        assertTrue(result.length() < 1000);
    }

    @Test
    public void test_buildAssistantHistoryContent_smartSummary_shortContent() {
        final ChatMessage msg = ChatMessage.assistantMessage("Short response");
        final String result = chatClient.testBuildAssistantHistoryContent(msg, "smart_summary", 500, 500);