chat_template.jinja

{{- '<|bos|>' -}}
{%- set ns = namespace(first_system='', injected=false) -%}
{%- if messages and messages[0].role == 'system' -%}
    {%- set ns.first_system = messages[0].content -%}
{%- endif -%}

{%- for message in messages -%}
    {%- if message.content is string -%}
        {%- set content = message.content -%}
    {%- else -%}
        {%- set content = '' -%}
    {%- endif -%}

    {%- if message.role == "user" -%}
        {%- if ns.first_system and not ns.injected -%}
            {{- '<|user_start|>' + ns.first_system + '

' + content + '<|user_end|>' -}}
            {%- set ns.injected = true -%}
        {%- else -%}
            {{- '<|user_start|>' + content + '<|user_end|>' -}}
        {%- endif -%}

    {%- elif message.role == "assistant" -%}
        {{- '<|assistant_start|>' -}}
        {% generation -%}
        {{- content + '<|assistant_end|>' -}}
        {%- endgeneration %}
    {%- endif -%}
{%- endfor -%}

{%- if add_generation_prompt -%}
    {{- '<|assistant_start|>' -}}
{%- else -%}
    {% generation -%}
    {{- '<|endoftext|>' -}}
    {%- endgeneration %}
{%- endif -%}