{%- if tools %}
    {{- '<|im_start|>system
' }}
    {%- if messages[0].role == 'system' %}
        {{- messages[0].content + '

' }}
    {%- endif %}
    {{- "# Tools

You may call one or more functions to assist with the user query.

You are provided with function signatures within <tools></tools> XML tags:
<tools>" }}
    {%- for tool in tools %}
        {{- "
" }}
        {{- tool }}
    {%- endfor %}
    {{- "
</tools>

For each function call, return a json object with function name and arguments within <tool_call></tool_call> XML tags:
<tool_call>
" }}
    {{- '{"name": <function-name>, "arguments": <args-json-object>}
</tool_call><|im_end|>
' }}
{%- else %}
    {%- if messages[0].role == 'system' %}
        {{- '<|im_start|>system
' + messages[0].content + '<|im_end|>
' }}
    {%- endif %}
{%- endif %}
{%- 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 message.content is string and not(message.content.startswith('<tool_response>') and message.content.endswith('</tool_response>')) %}
        {%- set ns.multi_step_tool = false %}
        {%- set ns.last_query_index = index %}
    {%- endif %}
{%- endfor %}
{%- for message in messages %}
    {%- if message.content is string %}
        {%- set content = message.content %}
    {%- else %}
        {%- set content = '' %}
    {%- endif %}
    {%- if (message.role == "user") or (message.role == "system" and not loop.first) %}
        {{- '<|im_start|>' + message.role + '
' + content + '<|im_end|>' + '
' }}
    {%- elif message.role == "assistant" %}
        {%- set reasoning_content = '' %}
        {%- if message.reasoning_content is string %}
            {%- set reasoning_content = message.reasoning_content %}
        {%- else %}
            {%- if '</think>' in content %}
                {%- set reasoning_content = content.split('</think>')[0].rstrip('
').split('<think>')[-1].lstrip('
') %}
                {%- set content = content.split('</think>')[-1].lstrip('
') %}
            {%- endif %}
        {%- endif %}
        {%- if loop.last or (not loop.last and reasoning_content) %}
            {{- '<|im_start|>' + message.role + '
<think>
' + reasoning_content.strip('
') + '
</think>

' + content.lstrip('
') }}
        {%- else %}
            {{- '<|im_start|>' + message.role + '
' + content }}
        {%- endif %}
        {%- if message.tool_calls %}
            {%- for tool_call in message.tool_calls %}
                {%- if (loop.first and content) or (not loop.first) %}
                    {{- '
' }}
                {%- endif %}
                {%- set raw_tool_call = tool_call %}
                {%- if tool_call.function %}
                    {%- set tool_call = tool_call.function %}
                {%- endif %}
                {{- '<tool_call>
' }}
                {# --- 解析成功：按原有 JSON 格式输出 --- #}
                {%- if (tool_call is mapping) and ('name' in tool_call) and ('arguments' in tool_call) %}
{"name": "{{ tool_call.name }}", "arguments": {%- if tool_call.arguments is string -%}{{ tool_call.arguments }}{%- else -%}{{ tool_call.arguments | tojson }}{%- endif -%}}
                {# --- 解析失败：把原始输入原样塞进 <tool_call> --- #}
                {%- else %}
{%- if raw_tool_call is string -%}{{ raw_tool_call }}{%- else -%}{{ raw_tool_call | tojson }}{%- endif -%}
                {%- endif %}
                {{- '
</tool_call>' }}
            {%- endfor %}
        {%- endif %}
        {{- '<|im_end|>
' }}
    {%- elif message.role == "tool" %}
        {%- if loop.first or (messages[loop.index0 - 1].role != "tool") %}
            {{- '<|im_start|>user' }}
        {%- endif %}
        {{- '
<tool_response>
' }}
        {{- content }}
        {{- '
</tool_response>' }}
        {%- if loop.last or (messages[loop.index0 + 1].role != "tool") %}
            {{- '<|im_end|>
' }}
        {%- endif %}
    {%- endif %}
{%- endfor %}
{%- if add_generation_prompt %}
    {{- '<|im_start|>assistant
' }}
    {%- if enable_thinking is defined and enable_thinking is false %}
        {{- '<think>

</think>

' }}
    {%- endif %}
{%- endif %}