{%- if messages[0]['role'] == 'system' %}
    {%- set system_message = messages[0]['content'] %}
{%- else %}
    {%- set system_message = 'You are Echo-DSRN, created by ethicalabs.ai. You are a helpful assistant.' %}
{%- endif %}

{%- if tools %}
    {{- '<|system|>\n' + system_message }}
    {{- "\n\n# Tools\n\nYou are a precise routing agent. You have access to the following tools. If a tool is required, output EXACTLY the tool call format. If no tool is required, respond conversationally.\n\nAvailable tools:\n<tools>" }}
    {%- for tool in tools %}
        {{- "\n" + tool | tojson }}
    {%- endfor %}
    {{- "\n</tools><|end|>\n" }}
{%- else %}
    {{- '<|system|>\n' + system_message + '<|end|>\n' }}
{%- endif %}

{%- for message in messages %}
    {%- if (message['role'] == "user") or (message['role'] == "system" and not loop.first) or (message['role'] == "assistant" and not message['tool_calls']) %}
        {{- '<|' + message['role'] + '|>\n' + message['content'] + '<|end|>\n' }}
    {%- elif message['role'] == "assistant" %}
        {{- '<|assistant|>\n' }}
        {%- if message['content'] %}
            {{- message['content'] }}
        {%- endif %}
        {%- if message['tool_calls'] %}
            {%- for tool_call in message['tool_calls'] %}
                {%- if tool_call['function'] is defined %}
                    {%- set tool_call = tool_call['function'] %}
                {%- endif %}
                {{- '\n<tool_call>\n{"name": "' + tool_call['name'] + '", "arguments": ' + tool_call['arguments'] | tojson + '}\n</tool_call>' }}
            {%- endfor %}
        {%- endif %}
        {{- '<|end|>\n' }}
    {%- elif message['role'] == "tool" %}
        {%- if loop.first or messages[loop.index0 - 1]['role'] != "tool" %}
            {{- '<|user|>\n' }}
        {%- endif %}
        {{- '<tool_response>\n' + message['content'] + '\n</tool_response>' }}
        {%- if loop.last or messages[loop.index0 + 1]['role'] != "tool" %}
            {{- '<|end|>\n' }}
        {%- endif %}
    {%- endif %}
{%- endfor %}

{%- if add_generation_prompt %}
    {{- '<|assistant|>\n' }}
{%- else %}
    {{- eos_token }}
{%- endif %}