assertEquals("assistant", messages.get(4).getRole());
        assertTrue(messages.get(5).getContent().contains("More details"));
    }

    @Test
    public void test_buildIntentRequest_manyTurns_trimmed() {
        // Verify maxHistory=6 applies for structured messages
        final List<LlmMessage> history = new ArrayList<>();
        for (int i = 1; i <= 8; i++) {