assertEquals(200, request.getMessages().get(0).getContent().length());
    }

    // ========== addIntentHistory tests ==========

    @Test
    public void test_addIntentHistory_withCharBudget() {
        final List<LlmMessage> history = new ArrayList<>();
        history.add(LlmMessage.user("Short")); // 5 chars
        history.add(LlmMessage.assistant("A".repeat(500))); // 500 chars