# DEBUG: dump messages before sending to vLLM/Qwen

    try:

        with open('/tmp/dify_openai_messages.log', 'a', encoding='utf-8') as _df:

            _df.write('--- model=%s stream=%s ---\n' % (model, stream))

            _df.write(json.dumps(

                [message(item) for item in _ensure_system_first(prompt_messages)],

                ensure_ascii=False, indent=2))

            _df.write('\n\n')

    except Exception as _e:

        pass