chat_template.jinja

{% for message in messages if message.role == 'user' and message.content is iterable and message.content is not string %}
    {% for item in message.content if item.type == 'image' %}
        {{- '<image>' -}}
    {% endfor %}
{% endfor %}

{{- '<|begin_of_sentence|>' -}}

{%- set system_message = namespace(value=none) -%}
{%- set has_tools = namespace(value=false) -%}

{%- if tools is defined and tools and tools|length > 0 -%}
    {%- set has_tools.value = true -%}
{%- endif -%}

{%- for message in messages if message.role == 'system' -%}
    {%- set system_message.value = message.content -%}
{%- endfor -%}

{%- if system_message.value or has_tools.value -%}
    {%- if has_tools.value -%}
        {%- if system_message.value -%}
            {{- '\n\n' -}}
        {%- endif -%}
        {{- '# Tools\n\nYou have access to the following functions. To call functions, please respond with a python list of the calls. ' -}}
        {{- 'Respond in the format [func_name1(params_name1="string_value", params_name2=123...), func_name2(params)] ' -}}
        {{- "String parameters MUST be wrapped in double quotes. Do not use variables.\n\n" }}
        {%- for tool in tools -%}
            {{- tool | tojson -}}
            {{- '\n\n' -}}
        {%- endfor -%}
    {%- endif -%}
    {%- if system_message.value -%}
        {{- system_message.value -}}
    {%- endif -%}
{%- endif -%}

{#- 计算最后一个非工具响应的用户查询索引（用于多轮工具调用判断）-#}
{%- set ns = namespace(multi_step_tool=true, last_query_index=messages|length - 1) -%}
{%- for message in messages[::-1] -%}
    {%- set index = (messages|length - 1) - loop.index0 -%}
    {%- if ns.multi_step_tool and message.role == "user" and not(message.content is string and (message.content.startswith('tool_response') or message.content.startswith('<tool_response>'))) -%}
        {%- set ns.multi_step_tool = false -%}
        {%- set ns.last_query_index = index -%}
    {%- endif -%}
{%- endfor -%}


{%- for message in messages -%}
    {%- if message.role == "user" -%}
        {{- '<|User|>' -}}
        {%- if message.content is string -%}
            {{- message.content -}}
        {%- elif message.content is iterable and message.content is not string -%}
            {%- for item in message.content if item.type == "text" -%}
                {{- item.text -}}
            {%- endfor -%}
        {%- endif -%}

    {%- elif message.role == "assistant" -%}
        {#- 提取 reasoning_content -#}
        {%- set content = message.content -%}
        {%- set reasoning_content = '' -%}
        {%- if message.reasoning_content is defined and message.reasoning_content is not none -%}
            {%- set reasoning_content = message.reasoning_content -%}
        {%- else -%}
            {%- if content is string and '</think>' in content -%}
                {%- set content = content.split('</think>')[-1].lstrip('\n') -%}
                {%- set reasoning_content = content.split('</think>')[0].rstrip('\n').split('<think>')[-1].lstrip('\n') -%}
            {%- endif -%}
        {%- endif -%}

        {#- 判断是否输出 think 块：只有在多轮工具调用的最终回答，且是最后一轮或有 reasoning_content -#}
        {%- set show_think = false -%}
        {%- if loop.index0 > ns.last_query_index -%}
            {%- if loop.last or (not loop.last and reasoning_content) -%}
                {%- set show_think = true -%}
            {%- endif -%}
        {%- endif -%}

        {{- '<|Assistant|>' -}}

        {%- if show_think and reasoning_content -%}
            {#- 最终回答，输出完整的 think 块 -#}
            {{- '<think>\n' + reasoning_content.strip('\n') + '\n</think>\n\n' -}}
        {%- elif enable_thinking is defined and not enable_thinking -%}
            {#- enable_thinking=false：输出空 think 标签 -#}
            {{- '</think>' -}}
        {%- endif -%}

        {%- if content is string -%}
            {{- content -}}
        {%- elif content is iterable and content is not string -%}
            {%- for item in content if item.type == "text" -%}
                {{- item.text -}}
            {%- endfor -%}
        {%- endif -%}

        {%- if message.tool_calls is defined and message.tool_calls -%}
            {{- '[' -}}
            {%- for tool_call in message.tool_calls -%}
                {%- if tool_call.function is defined -%}
                    {%- set tool_call_func = tool_call.function -%}
                {%- else -%}
                    {%- set tool_call_func = tool_call -%}
                {%- endif -%}
                {{- tool_call_func.name + '(' -}}
                {%- for param in tool_call_func.arguments -%}
                    {{- param + '=' -}}
                    {%- if tool_call_func.arguments[param] is string -%}
                        {{- '"' + tool_call_func.arguments[param] + '"' -}}
                    {%- else -%}
                        {{- tool_call_func.arguments[param] | tojson -}}
                    {%- endif -%}
                    {%- if not loop.last -%}, {% endif -%}
                {%- endfor -%}
                {{- ')' -}}
                {%- if not loop.last -%}, {% endif -%}
            {%- endfor -%}
            {{- ']' -}}
            {{- '<|end_of_sentence|>' -}}
        {%- endif -%}


    {%- elif message.role == "tool" -%}
        {%- if loop.first or (messages[loop.index0 - 1].role != "tool") -%}
            {{- '<|User|>tool_response\n' -}}
        {%- endif -%}
        {%- if message.content is mapping -%}
            {{- message.content | tojson -}}
        {%- else -%}
            {{- '{ "output": ' + (message.content | tojson) + ' }\n' -}}
        {%- endif -%}
    {%- endif -%}
{%- endfor -%}

{%- if add_generation_prompt -%}
    {{- '<|Assistant|>' -}}
    {%- if enable_thinking is defined -%}
        {{- "</think>" if not enable_thinking else "<think>" -}}
    {%- endif -%}
{%- endif -%}