{%- if messages and messages[0]['role'] == 'system' -%}
    {%- if messages[0]['content'] is string -%}
        {{- '<|system|>' + messages[0]['content'] -}}
    {%- else -%}
        {{- '<|system|>' + messages[0]['content'] | selectattr('type', 'equalto', 'text') | map(attribute='text') | join('') -}}
    {%- endif -%}
    {%- set loop_messages = messages[1:] -%}
{%- else -%}
    {%- set loop_messages = messages -%}
{%- endif -%}
{%- for message in loop_messages -%}
    {%- if message['role'] not in ['user', 'assistant'] -%}
        {{- raise_exception('Han2Han chat supports a leading system message, then user and assistant turns; got role ' + message['role']) -}}
    {%- endif -%}
    {%- if message['content'] is string -%}
        {%- set content = message['content'] -%}
    {%- else -%}
        {%- set content = message['content'] | selectattr('type', 'equalto', 'text') | map(attribute='text') | join('') -%}
    {%- endif -%}
    {{- '<|' + message['role'] + '|>' + content + '<|end_of_turn|>' -}}
{%- endfor -%}
{%- if add_generation_prompt -%}
    {{- '<|think|>' if enable_thinking is defined and enable_thinking else '<|assistant|>' -}}
{%- endif -%}