chat_template.jinja

{{- bos_token -}}
{%- set keep_past_thinking = keep_past_thinking | default(false) -%}

{%- macro format_arg_value(arg_value) -%}
    {%- if arg_value is string -%}
        {{- '"' + arg_value + '"' -}}
    {%- elif arg_value is mapping -%}
        {{- arg_value | tojson -}}
    {%- else -%}
        {{- arg_value | string -}}
    {%- endif -%}
{%- endmacro -%}

{%- macro parse_content(content) -%}
    {%- if content is string -%}
        {{- content -}}
    {%- else -%}
        {%- set _ns = namespace(result="") -%}
        {%- for item in content -%}
            {%- if item.type == "image" -%}
                {%- set _ns.result = _ns.result + "<image>" -%}
            {%- elif item.type == "text" -%}
                {%- set _ns.result = _ns.result + item.text -%}
            {%- else -%}
                {%- set _ns.result = _ns.result + item | tojson -%}
            {%- endif -%}
        {%- endfor -%}
        {{- _ns.result -}}
    {%- endif -%}
{%- endmacro -%}

{%- macro render_tool_calls(tool_calls) -%}
    {%- set tool_calls_ns = namespace(tool_calls=[]) -%}
    {%- for tool_call in tool_calls -%}
        {%- set func_name = tool_call.function.name -%}
        {%- set func_args = tool_call.function.arguments -%}
        {%- set args_ns = namespace(arg_strings=[]) -%}
        {%- for arg_name, arg_value in func_args.items() -%}
            {%- set args_ns.arg_strings = args_ns.arg_strings + [arg_name + "=" + format_arg_value(arg_value)] -%}
        {%- endfor -%}
        {%- set tool_calls_ns.tool_calls = tool_calls_ns.tool_calls + [func_name + "(" + (args_ns.arg_strings | join(", ")) + ")"] -%}
    {%- endfor -%}
    {{- "<|tool_call_start|>[" + (tool_calls_ns.tool_calls | join(", ")) + "]<|tool_call_end|>" -}}
{%- endmacro -%}

{%- set ns = namespace(system_prompt="", last_assistant_index=-1) -%}
{%- if messages[0].role == "system" -%}
    {%- if messages[0].content is defined -%}
        {%- set ns.system_prompt = parse_content(messages[0].content) -%}
    {%- endif -%}
    {%- set messages = messages[1:] -%}
{%- endif -%}
{%- if tools -%}
    {%- set ns.system_prompt = ns.system_prompt + ("\n\n" if ns.system_prompt else "") + "Today's date: " + strftime_now("%Y-%m-%d") + "\n\nList of tools: " + (tools | tojson) -%}
{%- endif -%}
{%- if ns.system_prompt -%}
    {{- "<|im_start|>system\n" + ns.system_prompt + "<|im_end|>\n" -}}
{%- endif -%}
{%- for message in messages -%}
    {%- if message.role == "assistant" -%}
        {%- set ns.last_assistant_index = loop.index0 -%}
    {%- endif -%}
{%- endfor -%}
{%- for message in messages -%}
    {{- "<|im_start|>" + message.role + "\n" -}}
    {%- if message.role == "assistant" -%}
        {%- generation -%}
        {%- if message.thinking is defined and (keep_past_thinking or loop.index0 == ns.last_assistant_index) -%}
            {{- "<think>" + message.thinking + "</think>" -}}
        {%- endif -%}
        {%- if message.tool_calls is defined -%}
            {{- render_tool_calls(message.tool_calls) -}}
        {%- endif -%}
        {%- if message.content is defined -%}
            {%- set content = parse_content(message.content) -%}
            {%- if not keep_past_thinking and loop.index0 != ns.last_assistant_index -%}
                {%- if "</think>" in content -%}
                    {%- set content = content.split("</think>")[-1] | trim -%}
                {%- endif -%}
            {%- endif -%}
            {{- content + ("" if (continue_final_message and loop.last) else "<|im_end|>\n") -}}
        {%- endif -%}
        {%- endgeneration -%}
    {%- else %}
        {%- if message.content is defined -%}
            {{- parse_content(message.content) + "<|im_end|>\n" -}}
        {%- endif -%}
    {%- endif %}
{%- endfor -%}
{%- if add_generation_prompt -%}
    {{- "<|im_start|>assistant\n" -}}
{%- endif -%}