{{- bos_token }}
{%- if tools %}
    {%- set tool_definitions %}
        {{- "# Tools\n\nYou are provided with function signatures within <tools></tools> XML tags:\n<tools>" }}
        {%- for tool in tools %}
            {{- "\n" }}
            {{- tool | tojson }}
        {%- endfor %}
        {{- '\n</tools>\n\nTool usage guidelines:\n- You may call zero or more functions. If no function calls are needed, just answer normally.\n- When calling a function, wrap each call in <tool_call> tags:\n<tool_call>\n<function=name>\n<parameter=key>value</parameter>\n</function>\n</tool_call>' }}
    {%- endset %}

    {{- '<|im_start|>system\n' }}
    {%- if messages[0].role == 'system' %}
        {{- messages[0].content + '\n\n' + tool_definitions }}
    {%- else %}
        {{- tool_definitions }}
    {%- endif %}
    {{- '<|im_end|>\n' }}
{%- else %}
    {%- if messages[0].role == 'system' %}
        {{- '<|im_start|>system\n' + messages[0].content + '<|im_end|>\n' }}
    {%- endif %}
{%- endif %}
{%- for message in messages %}
    {%- set content = message.content %}
    {%- if (message.role == "user") or (message.role == "system" and not loop.first) %}
        {{- '<|im_start|>' + message.role + '\n' + content + '<|im_end|>' + '\n' }}
    {%- elif message.role == "assistant" %}
        {#- Tool-call XML from history is pre-embedded in content by build_prompt. #}
        {{- '<|im_start|>assistant\n' + content + '<|im_end|>\n' }}
    {%- elif message.role == "tool" %}
        {{- '<|im_start|>user\n<tool_response>\n' + content + '\n</tool_response><|im_end|>\n' }}
    {%- endif %}
{%- endfor %}
{%- if add_generation_prompt %}
    {{- '<|im_start|>assistant\n' }}
    {%- if enable_thinking is defined %}
        {%- if enable_thinking is false %}
            {{- '<think>\n\n</think>\n\n' }}
        {%- elif enable_thinking is true %}
            {{- '<think>\n' }}
        {%- endif %}
    {%- endif %}
{%- endif %}