vllm-dev/examples/tool_chat_template_deepseekr1.jinja

{% if not add_generation_prompt is defined %}
    {% set add_generation_prompt = false %}
{% endif %}
{% set ns = namespace(is_first=false, is_tool=false, is_output_first=true, system_prompt='', is_first_sp=true, is_last_user=false) %}
{%- for message in messages %}
    {%- if message['role'] == 'system' %}
        {%- if ns.is_first_sp %}
            {% set ns.system_prompt = ns.system_prompt + message['content'] %}
            {% set ns.is_first_sp = false %}
        {%- else %}
            {% set ns.system_prompt = ns.system_prompt + '\n\n' + message['content'] %}
        {%- endif %}
    {%- endif %}
{%- endfor -%}

{#- Adapted from https://github.com/sgl-project/sglang/blob/main/examples/chat_template/tool_chat_template_deepseekr1.jinja #}
{% if tools is defined and tools is not none %}
    {% set tool_ns = namespace(text='You are a helpful assistant with tool calling capabilities. '
        'When a tool call is needed, you MUST use the following format to issue the call:\n'
        '<｜tool▁calls▁begin｜><｜tool▁call▁begin｜>function<｜tool▁sep｜>FUNCTION_NAME\n'
        '```json\n{"param1": "value1", "param2": "value2"}\n```<｜tool▁call▁end｜><｜tool▁calls▁end｜>\n\n'
        'Make sure the JSON is valid.'
        '## Tools\n\n### Function\n\nYou have the following functions available:\n\n') %}
    {% for tool in tools %}
        {% set tool_ns.text = tool_ns.text + '\n```json\n' + (tool | tojson) + '\n```\n' %}
    {% endfor %}
    {% set ns.system_prompt = ns.system_prompt + '\n\n' + tool_ns.text %}
{% endif %}

{{- bos_token }}
{{- ns.system_prompt }}
{%- for message in messages %}
    {% set content = message['content'] %}
    {%- if message['role'] == 'user' %}
        {%- set ns.is_tool = false -%}
        {%- set ns.is_first = false -%}
        {%- set ns.is_last_user = true -%}
        {{'<｜User｜>' + content + '<｜Assistant｜>'}}
    {%- endif %}
    {%- if message['role'] == 'assistant' %}
        {% if '</think>' in content %}
            {% set content = content.split('</think>')[-1] %}
        {% endif %}
    {% endif %}
    {%- if message['role'] == 'assistant' and message['tool_calls'] is defined and message['tool_calls'] is not none %}
        {%- set ns.is_last_user = false -%}
        {%- if ns.is_tool %}
            {{- '<｜tool▁outputs▁end｜>'}}
        {%- endif %}
        {%- set ns.is_first = false %}
        {%- set ns.is_tool = false -%}
        {%- set ns.is_output_first = true %}
        {%- for tool in message['tool_calls'] %}
            {%- if not ns.is_first %}
                {%- if content is none %}
                    {{- '<｜tool▁calls▁begin｜><｜tool▁call▁begin｜>' + tool['type'] + '<｜tool▁sep｜>' + tool['function']['name'] + '\n' + '```json' + '\n' + tool['function']['arguments']|tojson + '\n' + '```' + '<｜tool▁call▁end｜>'}}
                {%- else %}
                    {{- content + '<｜tool▁calls▁begin｜><｜tool▁call▁begin｜>' + tool['type'] + '<｜tool▁sep｜>' + tool['function']['name'] + '\n' + '```json' + '\n' + tool['function']['arguments']|tojson + '\n' + '```' + '<｜tool▁call▁end｜>'}}
                {%- endif %}
                {%- set ns.is_first = true -%}
            {%- else %}
                {{- '\n' + '<｜tool▁call▁begin｜>' + tool['type'] + '<｜tool▁sep｜>' + tool['function']['name'] + '\n' + '```json' + '\n' + tool['function']['arguments']|tojson + '\n' + '```' + '<｜tool▁call▁end｜>'}}
            {%- endif %}
        {%- endfor %}
        {{- '<｜tool▁calls▁end｜><｜end▁of▁sentence｜>'}}
    {%- endif %}
    {%- if message['role'] == 'assistant' and (message['tool_calls'] is not defined or message['tool_calls'] is none)%}
        {%- set ns.is_last_user = false -%}
        {%- if ns.is_tool %}
            {{- '<｜tool▁outputs▁end｜>' + content + '<｜end▁of▁sentence｜>'}}
            {%- set ns.is_tool = false -%}
        {%- else %}
            {{- content + '<｜end▁of▁sentence｜>'}}
        {%- endif %}
    {%- endif %}
    {%- if message['role'] == 'tool' %}
        {%- set ns.is_last_user = false -%}
        {%- set ns.is_tool = true -%}
        {%- if ns.is_output_first %}
            {{- '<｜tool▁outputs▁begin｜><｜tool▁output▁begin｜>' + content + '<｜tool▁output▁end｜>'}}
            {%- set ns.is_output_first = false %}
        {%- else %}
            {{- '\n<｜tool▁output▁begin｜>' + content + '<｜tool▁output▁end｜>'}}
        {%- endif %}
    {%- endif %}
{%- endfor -%}
{% if ns.is_tool %}
    {{- '<｜tool▁outputs▁end｜>'}}
{%- endif %}
{% if add_generation_prompt and not ns.is_last_user and not ns.is_tool %}
    {{- '<｜Assistant｜>'}}
{%- endif %}