Settings ExLLama.ChatTemplate.Alpaca (LLama CPP Nif Wrapper v0.0.2)

based on: [https://github.com/chujiezheng/chat_templates/blob/main/chat_templates/alpaca.jinja]

{% if messages[0]['role'] == 'system' %}
  {% set loop_messages = messages[1:] %}
  {% set system_message = messages[0]['content'].strip() + '

' %}
{% else %}
  {% set loop_messages = messages %}
  {% set system_message = '' %}
{% endif %}

{{ bos_token + system_message }}
{% for message in loop_messages %}
  {% if (message['role'] == 'user') != (loop.index0 % 2 == 0) %}
      {{ raise_exception('Conversation roles must alternate user/assistant/user/assistant/...') }}
  {% endif %}

  {% if message['role'] == 'user' %}
      {{ '### Instruction:
' + message['content'].strip() + '

' }}
  {% elif message['role'] == 'assistant' %}
      {{ '### Response:
' + message['content'].strip() + eos_token + '

' }}
  {% endif %}

  {% if loop.last and message['role'] == 'user' and add_generation_prompt %}
      {{ '### Instruction:
' }}
  {% endif %}
{% endfor %}
````