chat_template.jinja

{%- for message in messages %}
    {%- if loop.index0 == 0 %}
        {{- bos_token }}
    {%- endif %}

    {# ===== SYSTEM MESSAGES ===== #}
    {%- if message['role'] == 'system' %}
        {{- "<|system|>" }}
        {{- message['content'] }}
        {{- eos_token }}

    {# ===== USER MESSAGES ===== #}
    {%- elif message['role'] == 'user' %}
        {{- "<|user|>" }}
        {{- message['content'] }}
        {{- eos_token }}

    {# ===== TOOL RESPONSES ===== #}
    {%- elif message['role'] == 'tool' %}
        {{- "<tool_result>" }}
        {{- message['name'] ~ " " if message['name'] else "" }}
        {{- message['content'] }}
        {{- "</tool_result>" }}
        {{- eos_token }}

    {# ===== ASSISTANT MESSAGES — NORMAL OR WITH TOOL CALL ===== #}
    {%- elif message['role'] == 'assistant' %}
        {{- "<|assistant|>" }}

        {# CASE 1 — assistant text only #}
        {%- if 'tool_calls' not in message %}
            {{- message['content'] }}
            {{- eos_token }}

        {# CASE 2 — assistant performs tool call #}
        {%- else %}
            {%- for tool_call in message['tool_calls'] %}
                {{- "<tool_call>" }}
                {{- tool_call['function']['name'] }}
                {{- "\n" }}
                {{- tool_call['function']['arguments'] | tojson }}
                {{- "</tool_call>" }}
                {{- eos_token }}
            {%- endfor %}
        {%- endif %}

    {%- endif %}
{%- endfor %}

{%- if add_generation_prompt %}
    {{- "<|assistant|>" }}
{%- endif %}