chat_template.jinja

{%- set system_start = '<|im_start|>system\n' -%}
{%- set user_start = '<|im_start|>user\n' -%}
{%- set assistant_start = '<|im_start|>assistant\n' -%}
{%- set system_end = '<|im_end|>\n' -%}
{%- set user_end = '<|im_end|>\n' -%}
{%- set assistant_end = '<|im_end|>\n' -%}
{%- set tool_defs_start = '<|tools_start|>\n' -%}
{%- set tool_defs_end = '\n<|tools_end|>' -%}
{%- set tool_call_start = '\n<|tool_start|>\n' -%}
{%- set tool_call_end = '\n<|tool_end|>' -%}
{%- set tool_result_start = '<|im_start|>tool\n' -%}
{%- set tool_result_sep = '\n' -%}
{%- set tool_result_end = '\n<|im_end|>\n' -%}
{%- set reasoning_start = '<|thinking|>\n' -%}
{%- set reasoning_end = '\n<|thinking_end|>\n' -%}
{%- set default_system_prompt = "" -%}
{%- set tool_defs_preamble = "You are provided with function signatures within " + tool_defs_start.strip() + tool_defs_end.strip() + "\n" -%}
{%- set tool_defs_postamble = "\nFor each function call, call them within " + tool_call_start.strip() + tool_call_end.strip() + "." -%}
{%- set tool_defs_style = "python" -%}
{%- set tool_call_style = "python" -%}

{%- set content_ns = namespace(content='') %}

{%- if messages[0].role == 'system' %}
    {%- if messages[0].content is string %}
        {%- set content_ns.content = messages[0].content %}
    {%- elif messages[0].content is iterable %}
        {%- set content_ns.content = '' %}
        {%- for part in messages[0].content %}
            {%- set content_ns.content = content_ns.content + part.text %}
        {%- endfor %}
    {%- else %}
        {%- set content_ns.content = '' %}
    {%- endif %}
    {%- set messages = messages[1:] %}
{%- else %}
    {%- set content_ns.content = default_system_prompt %}
{%- endif %}

{%- macro json_to_python_type(json_spec) %}
    {%- set basic_type_map = {
        "string": "str",
        "number": "float",
        "integer": "int",
        "boolean": "bool"
    } %}

    {%- if basic_type_map[json_spec.type] is defined %}
        {{- basic_type_map[json_spec.type] }}
    {%- elif json_spec.type == "array" %}
        {{- "List[" +  json_to_python_type(json_spec.items) + "]"}}
    {%- elif json_spec.type == "object" %}
        {{- "Dict[str, " + json_to_python_type(json_spec.additionalProperties) + ']'}}
    {%- elif json_spec.type is iterable %}
        {{- "Union[" }}
        {%- for t in json_spec.type %}
            {{- json_to_python_type({"type": t}) }}
            {%- if not loop.last %}
                {{- "," }} 
            {%- endif %}
        {%- endfor %}
        {{- "]" }}
    {%- else %}
        {{- "Any" }}
    {%- endif %}
{%- endmacro %}

{%- macro json_to_python_value(json_value) %}
    {%- if json_value is string %}
        {{- json_value|tojson }}
    {%- elif json_value is integer or json_value is float %}
        {{- json_value|tojson }}
    {%- elif json_value is boolean %}
        {%- if json_value %}
            {{- "True" }}
        {%- else %}
            {{- "False" }}
        {%- endif %}
    {%- elif json_value is iterable %}
        {{- "[" }}
        {%- for item in json_value %}
            {{- json_to_python_value(item) }}
            {%- if not loop.last %}
                {{- ',' }}
            {%- endif %}
        {%- endfor %}
        {{- "]" }}
    {%- else %}
        {{- "None" }}
    {%- endif %}
{%- endmacro%}

{%- macro python_tools_parser(tools) %}
    {%- for tool in tools %}
        {%- if loop.index0 != 0 %}
            {{- '\n\n'}}
        {%- endif %}
        {%- if tool.function is defined %}
            {%- set tool = tool.function %}
        {%- endif %}
        {{-'def ' + tool.name + '('}}
        {%- for param_name, param_fields in tool.parameters.properties|items %}
            {%- if loop.index0 != 0 %}
                {{- ', '}}
            {%- endif %}
            {{-param_name + ": "}} 
            {%- if not param_name in tool.parameters.required %}
                {{-'Optional[' + json_to_python_type(param_fields) + '] = None'}}
            {%- else %}
                {{- json_to_python_type(param_fields) }}
            {%- endif %}
        {%- endfor %}
        {{- ') -> str:\n    """'}}
        {{- tool.description }}
        {%- if tool.parameters.properties|length != 0 %}
            {{- '\n\n    Args:\n        '}}
            {%- for param_name, param_fields in tool.parameters.properties|items %}
                {%- if loop.index0 != 0 %}
                    {{- '\n        ' }}
                {%- endif %}
                {{- param_name + ' ('}}
                {%- if not param_name in tool.parameters.required %}
                    {{-'Optional[' + json_to_python_type(param_fields) + ']'}}
                {%- else %}
                    {{- json_to_python_type(param_fields) }}
                {%- endif %}
                {{- ')' }}
                {%- if param_fields.description %}
                    {{- ': ' + param_fields.description }}
                {%- endif%}
            {%- endfor %}
        {%- endif %}
        {{- '\n    """\n    pass' }}
    {%- endfor %}
{%- endmacro %}

{%- macro python_tool_call_parser(tool_call) %}
    {{- tool_call.name + '(' }}
    {%- if tool_call.arguments is string %}
        {{- raise_exception("Python tool call parser doesn't support arguments as a json string") }}
    {%- endif %}
    {%- for param_name, param_field in tool_call.arguments|items %}
        {{- param_name + '= '}}
        {{- json_to_python_value(param_field) }}
        {%- if not loop.last %}
            {{- ', '}}
        {%- endif %}
    {%- endfor %}
    {{- ')' }}
{%- endmacro %}

{%- macro json_tools_parser(tools) %}
{%- for tool in tools %}
    {%- if not loop.first %}
        {{- "\n" }}
    {%- endif %}
    {{- tool | tojson }}
{%- endfor %}
{%- endmacro %}

{%- macro json_tool_call_parser(tool_call) %}
    {{-  '{"name": "' }}
    {{- tool_call.name }}
    {{- '", "arguments": ' }}
    {%- if tool_call.arguments is string %}
        {{- tool_call.arguments }}
    {%- else %}
        {{- tool_call.arguments | tojson }}
    {%- endif %}
    {{- '}' }}
{%- endmacro %}

{%- if tools %}
    {{- system_start }}
    {%- if content_ns.content | length > 0 %}
        {{- content_ns.content + '\n\n' }}
    {%- endif %}
    {{- tool_defs_preamble + tool_defs_start }}
    {%- if tool_defs_style == "json" %}
        {{- json_tools_parser(tools) }}
    {%- elif tool_defs_style == "python" %}
        {{- python_tools_parser(tools) }}
    {%- else %}
        {{- raise_exception("Invalid tool definition style (" + tool_defs_style + "), must be 'json' or 'python'") }}
    {%- endif %}
    {{- tool_defs_end + tool_defs_postamble }}
    {%- if (messages|length == 0) and not add_generation_prompt %}
        {{- system_end.rstrip('\n') }}
    {%- else %}
        {{- system_end }}
    {%- endif %}
{%- else %}
    {%- if content_ns.content | length > 0 %}
        {{- system_start + content_ns.content }}
        {%- if (messages|length == 0) and not add_generation_prompt %}
            {{- system_end.rstrip('\n') }}
        {%- else %}
            {{- system_end }}
        {%- endif %}
    {%- 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_result_start) and message.content.endswith(tool_result_end)) %}
        {%- 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_ns.content = message.content %}
    {%- elif message.content is iterable %}
        {%- set content_ns.content = '' %}
        {%- for part in message.content %}
            {%- set content_ns.content = content_ns.content + part.text %}
        {%- endfor %}
    {%- else %}
        {%- set content_ns.content = '' %}
    {%- endif %}

    {%- if message.role == "system" %}
        {{- system_start }}

        {%- if loop.last and not add_generation_prompt %}
            {%- set end_marker = system_end.rstrip('\n') %}
        {%- else %}
            {%- set end_marker = system_end %}
        {%- endif %}

        {%- if message.content is string %}
            {{- content_ns.content + end_marker }}
        {%- else %}
            {%- for item in message.content %}
                {%- if item.mask is defined and not item.mask %}
                    {%- generation %}
                    {{- item.text }}
                    {%- if loop.last %}
                        {{- end_marker }}
                    {%- endif %}
                    {%- endgeneration %}
                {%- else %}
                    {{- item.text }}
                    {%- if loop.last %}
                        {{- end_marker }}
                    {%- endif %}
                {%- endif %}
            {%- endfor %}
        {%- endif %}


    {%- elif message.role == "user" %}
        {{- user_start }}

        {%- if loop.last and not add_generation_prompt %}
            {%- set end_marker = user_end.rstrip('\n') %}
        {%- else %}
            {%- set end_marker = user_end %}
        {%- endif %}

        {%- if message.content is string %}
            {{- content_ns.content + end_marker }}
        {%- else %}
            {%- for item in message.content %}
                {%- if item.mask is defined and not item.mask %}
                    {%- generation %}
                    {{- item.text }}
                    {%- if loop.last %}
                        {{- end_marker }}
                    {%- endif %}
                    {%- endgeneration %}
                {%- else %}
                    {{- item.text }}
                    {%- if loop.last %}
                        {{- end_marker }}
                    {%- endif %}
                {%- endif %}
            {%- endfor %}
        {%- endif %}


    {%- elif message.role == "assistant" %}
        {%- set reasoning_content = none %}
        {%- if message.reasoning_content is string %}
            {%- set reasoning_content = message.reasoning_content %}
        {%- else %}
            {%- if reasoning_start in content_ns.content %}
                {%- set reasoning_content = content_ns.content.split(reasoning_end)[0].rstrip('\n').split(reasoning_start)[-1].lstrip('\n') %}
                {%- set content = content_ns.content.split(reasoning_end)[-1].lstrip('\n') %}
            {%- endif %}
        {%- endif %}

        {{- assistant_start }}

        {%- if loop.index0 > ns.last_query_index %}
            {%- if loop.last and reasoning_content %}
                {%- set reasoning_end_marker = reasoning_end %}
                {%- if content_ns.content is string %}
                    {%- set content_ns.content = content_ns.content.lstrip('\n') %}
                    {%- if content_ns.content == '' %}
                        {%- set reasoning_end_marker = reasoning_end.rstrip('\n') %}
                    {%- endif %}
                {%- endif %}
                {%- generation %}
                {{- reasoning_start + reasoning_content.strip('\n') + reasoning_end_marker }}
                {%- endgeneration %}
            {%- endif %}
        {%- endif %}

        {%- if message.content is string %}
            {%- generation %}
            {{- content_ns.content }}
            {%- endgeneration %}
        {%- else %}
            {%- for item in message.content %}
                {%- if not item.mask is defined or not item.mask %}
                    {%- generation %}
                    {{- item.text }}
                    {%- endgeneration %}
                {%- else %}
                    {{- item.text }}
                {%- endif %}
            {%- endfor %}
        {%- endif %}
        {%- generation %}
        {%- if message.tool_calls %}
            {%- for tool_call in message.tool_calls %}
                {%- if tool_call.function %}
                    {%- set tool_call = tool_call.function %}
                {%- endif %}
                {%- if (loop.first and content_ns.content) or (not loop.first) %}
                    {{- tool_call_start }}
                {%- else %}
                    {{- tool_call_start.lstrip('\n') }}
                {%- endif %}
                {%- if tool_call_style == 'json' %}
                    {{- json_tool_call_parser(tool_call) }}
                {%- elif tool_call_style == 'python' %}
                    {{- python_tool_call_parser(tool_call) }}
                {%- endif %}
                {{- tool_call_end }}
            {%- endfor %}
        {%- endif %}
        {%- endgeneration %}
        {%- if not continue_final_message %}
            {%- if loop.last %}
                {%- set end_marker = assistant_end.rstrip('\n') %}
            {%- else %}
                {%- set end_marker = assistant_end %}
            {%- endif %}
        {%- endif %}            
        {%- if message.content is string or (message.content is defined and (not message.content[message.content|length - 1].mask is defined or not message.content[message.content|length - 1].mask)) or (message.tool_calls) %}
            {%- generation%}
            {{- end_marker }}
            {%- endgeneration %}
        {%- else %}
            {{- end_marker }}
        {%- endif %}

    {%- elif message.role == "tool" %}
        {%- if loop.first or (messages[loop.index0 - 1].role != "tool") %}
            {{- tool_result_start }}
        {%- else %}
            {{- tool_result_sep }}
        {%- endif %}
        {{- content_ns.content }}
        {%- if loop.last %}
            {{- tool_result_end.rstrip('\n') }}
        {%- elif (messages[loop.index0 + 1].role != "tool") %}
            {{- tool_result_end.rstrip('\n') }}
        {%- endif %}
    {%- endif %}
{%- endfor %}
{%- if add_generation_prompt %}
    {{- assistant_start }}
    {%- if enable_thinking is defined and enable_thinking is true %}
        {%- generation %}
        {{- reasoning_start }}
        {%- endgeneration %}
    {%- endif %}
{%- endif -%}