{#- Text-only training template for Gemma 4 (E2B) with assistant-only loss. -#}
{{ bos_token }}
{%- for message in messages -%}
    {%- if message['role'] == 'assistant' -%}
{{ '<|turn>model\n' }}{% generation %}{{ message['content'] | trim }}{{ '<turn|>\n' }}{% endgeneration %}
    {%- elif message['role'] == 'user' -%}
{{ '<|turn>user\n' }}{{ message['content'] | trim }}{{ '<turn|>\n' }}
    {%- elif message['role'] == 'system' -%}
{{ '<|turn>user\n' }}{{ message['content'] | trim }}{{ '<turn|>\n' }}
    {%- else -%}
{{ raise_exception('Unsupported role: ' ~ message['role']) }}
    {%- endif -%}
{%- endfor -%}
{%- if add_generation_prompt -%}
{{ '<|turn>model\n' }}
{%- endif -%}