{%- macro strip_thinking(text) -%}
    {%- set ns = namespace(result='') -%}
    {%- for part in text.split('<channel|>') -%}
        {%- if '<|channel>' in part -%}
            {%- set ns.result = ns.result + part.split('<|channel>')[0] -%}
        {%- else -%}
            {%- set ns.result = ns.result + part -%}
        {%- endif -%}
    {%- endfor -%}
    {{- ns.result | trim -}}
{%- endmacro -%}
{%- set loop_messages = messages -%} {{ bos_token }}
{#- Handle System Definitions Block -#} {%- if (enable_thinking is defined and enable_thinking) or messages[0]['role'] in ['system', 'developer'] -%}
    {{- '<|turn>system\n' -}}

    {#- Inject Thinking token at the very top of the FIRST system turn -#}
    {%- if enable_thinking is defined and enable_thinking -%}
        {{- '<|think|>' -}}
    {%- endif -%}

    {%- if messages[0]['role'] in ['system', 'developer'] -%}
        {{- messages[0]['content'] | trim -}}
        {%- set loop_messages = messages[1:] -%}
    {%- endif -%}
    
    {{- '<turn|>\n' -}}
{%- endif %}
{#- Loop through messages -#} {%- for message in loop_messages -%}
    {%- set role = 'model' if message['role'] == 'assistant' else message['role'] -%}
    {{- '<|turn>' + role + '\n' -}}

    {#- Flag to identify the final SFT turn -#}
    {%- set is_final_sft_turn = loop.last and not add_generation_prompt -%}

    {%- if message['content'] is string -%}
        {%- if role == 'model' -%}
            {%- if is_final_sft_turn and '<|channel>thought' not in message['content'] -%}
                {{- '<|channel>thought\n<channel|>' -}}
            {%- endif -%}
            {{- strip_thinking(message['content']) -}}
        {%- else -%}
            {{- message['content'] | trim -}}
        {%- endif -%}
    {%- elif message['content'] is sequence -%}
        {%- set ns = namespace(has_thinking=false) -%}
        {%- for item in message['content'] -%}
            {%- if item['type'] == 'text' and '<|channel>thought' in item['text'] -%}
                {%- set ns.has_thinking = true -%}
            {%- endif -%}
        {%- endfor -%}
        
        {%- if role == 'model' and is_final_sft_turn and not ns.has_thinking -%}
            {{- '<|channel>thought\n<channel|>' -}}
        {%- endif -%}

        {%- for item in message['content'] -%}
            {%- if item['type'] == 'text' -%}
                {%- if role == 'model' -%}
                    {{- strip_thinking(item['text']) -}}
                {%- else -%}
                    {{- item['text'] | trim -}}
                {%- endif -%}
            {%- endif -%}
        {%- endfor -%}
    {%- endif -%}

    {{- '<turn|>\n' -}}
{%- endfor -%}
{#- Generation Prompt handled as normal (serves as the final turn when true) -#} {%- if add_generation_prompt -%}
    {{- '<|turn>model\n' -}}
    {%- if not enable_thinking | default(false) -%}
        {{- '<|channel>thought\n<channel|>' -}}
    {%- endif -%}
{%- endif -%}