// Budget=25: turn2(10) fits (remaining=15), turn1(10) fits (remaining=5), turn0(10) doesn't
        final List<LlmMessage> history = new ArrayList<>();
        history.add(LlmMessage.user("QQQQQ")); // 5
        history.add(LlmMessage.assistant("AAAAA")); // 5
        history.add(LlmMessage.user("RRRRR")); // 5
        history.add(LlmMessage.assistant("SSSSS")); // 5
        history.add(LlmMessage.user("TTTTT")); // 5