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chat_template.jinja

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+{%- set image_count = namespace(value=0) %}
+{%- set video_count = namespace(value=0) %}
+{%- macro render_content(content, do_vision_count, is_system_content=false) %}
+  {%- if content is string %}
+    {{- content }}
+  {%- elif content is iterable and content is not mapping %}
+    {%- for item in content %}
+      {%- if item is not mapping %}
+        {{- item }}
+      {%- elif 'image' in item or 'image_url' in item or item.type == 'image' %}
+        {%- if is_system_content %}
+          {{- raise_exception('System message cannot contain images.') }}
+        {%- endif %}
+        {%- if do_vision_count %}
+          {%- set image_count.value = image_count.value + 1 %}
+        {%- endif %}
+        {%- if add_vision_id is defined and add_vision_id %}
+          {{- 'Picture ' ~ image_count.value ~ ': ' }}
+        {%- endif %}
+        {{- '<|vision_start|><|image_pad|><|vision_end|>' }}
+      {%- elif 'video' in item or item.type == 'video' %}
+        {%- if is_system_content %}
+          {{- raise_exception('System message cannot contain videos.') }}
+        {%- endif %}
+        {%- if do_vision_count %}
+          {%- set video_count.value = video_count.value + 1 %}
+        {%- endif %}
+        {%- if add_vision_id is defined and add_vision_id %}
+          {{- 'Video ' ~ video_count.value ~ ': ' }}
+        {%- endif %}
+        {{- '<|vision_start|><|video_pad|><|vision_end|>' }}
+      {%- elif 'audio' in item or 'audio_url' in item or item.type in ['audio', 'input_audio'] %}
+        {%- if is_system_content %}
+          {{- raise_exception('System message cannot contain audio.') }}
+        {%- endif %}
+        {{- '<|audio_start|><|audio_pad|><|audio_end|>' }}
+      {%- elif 'text' in item %}
+        {{- item.text }}
+      {%- else %}
+        {{- raise_exception('Unexpected item type in content.') }}
+      {%- endif %}
+    {%- endfor %}
+  {%- elif content is none or content is undefined %}
+    {{- '' }}
+  {%- else %}
+    {{- raise_exception('Unexpected content type.') }}
+  {%- endif %}
+{%- endmacro %}
+
+{%- if not messages %}
+  {{- raise_exception('No messages provided.') }}
+{%- endif %}
+
+{# --- 1. REASONING EFFORT RESOLUTION & PRESERVE-THINKING DISCOVERY --- #}
+{%- if preserve_reasoning is defined and preserve_reasoning is not none %}
+  {%- set _preserve_thinking = preserve_reasoning %}
+{%- elif preserve_thinking is defined and preserve_thinking is not none %}
+  {%- set _preserve_thinking = preserve_thinking %}
+{%- else %}
+  {%- set _preserve_thinking = true %}
+{%- endif %}
+
+{%- set _raw_effort = (reasoning_effort | string | lower) if reasoning_effort is defined and reasoning_effort is not none else ((thinking_effort | string | lower) if thinking_effort is defined and thinking_effort is not none else 'medium') %}
+{%- set _enable_thinking = true %}
+{%- if enable_thinking is defined and enable_thinking is false %}
+  {%- set _enable_thinking = false %}
+{%- elif _raw_effort in ['none', 'off', 'false', '0'] %}
+  {%- set _enable_thinking = false %}
+{%- endif %}
+
+{%- set _resolved_effort = 'medium' %}
+{%- if _raw_effort in ['minimal', 'min', 'low', '1'] %}
+  {%- set _resolved_effort = 'low' %}
+{%- elif _raw_effort in ['high', '3'] %}
+  {%- set _resolved_effort = 'high' %}
+{%- elif _raw_effort in ['xhigh', 'max', 'extreme', 'ultracode', '4'] %}
+  {%- set _resolved_effort = 'xhigh' %}
+{%- endif %}
+
+{%- set _effort_prompt = '' %}
+{%- if _enable_thinking %}
+  {%- if _resolved_effort == 'low' %}
+    {%- set _effort_prompt = 'Reasoning effort is set to low. Keep your thinking concise, efficient, and direct to the point.' %}
+  {%- elif _resolved_effort == 'high' %}
+    {%- set _effort_prompt = 'Reasoning effort is set to high. Think thoroughly through all steps, verify logic, and test potential edge cases.' %}
+  {%- elif _resolved_effort == 'xhigh' %}
+    {%- set _effort_prompt = 'Reasoning effort is set to xhigh. Please think exhaustively through the task, systematically exploring alternative hypotheses and proving edge cases before answering.' %}
+  {%- endif %}
+{%- endif %}
+
+{# --- 2. SYSTEM PROMPT & TOOL DECLARATIONS --- #}
+{%- set _has_tools = (tools and tools is iterable and tools is not mapping) %}
+{%- if _has_tools %}
+  {{- '<|im_start|>system\n' }}
+  {{- "# Tools\n\nYou have access to the following functions:\n\n<tools>" }}
+  {%- for tool in tools %}
+    {{- "\n" }}
+    {{- tool | tojson }}
+  {%- endfor %}
+  {{- "\n</tools>" }}
+  {{- '\n\nIf you choose to call a function ONLY reply in the following format with NO suffix:\n\n<tool_call>\n<function=example_function_name>\n<parameter=example_parameter_1>\nvalue_1\n</parameter>\n<parameter=example_parameter_2>\nThis is the value for the second parameter\nthat can span\nmultiple lines\n</parameter>\n</function>\n</tool_call>\n\n<IMPORTANT>\nReminder:\n- Function calls MUST follow the specified format: an inner <function=...></function> block must be nested within <tool_call></tool_call> XML tags\n- Required parameters MUST be specified\n- You may provide optional reasoning for your function call in natural language BEFORE the function call, but NOT after\n- If there is no function call available, answer the question like normal with your current knowledge and do not tell the user about function calls\n</IMPORTANT>' }}
+  {%- if messages[0].role == 'system' %}
+    {%- set content = render_content(messages[0].content, false, true)|trim %}
+    {%- if content %}
+      {{- '\n\n' + content }}
+    {%- endif %}
+  {%- endif %}
+  {%- if _effort_prompt %}
+    {{- '\n\n' + _effort_prompt }}
+  {%- endif %}
+  {{- '<|im_end|>\n' }}
+{%- else %}
+  {%- if messages[0].role == 'system' %}
+    {%- set content = render_content(messages[0].content, false, true)|trim %}
+    {%- if _effort_prompt %}
+      {%- set content = content + ('\n\n' + _effort_prompt if content else _effort_prompt) %}
+    {%- endif %}
+    {{- '<|im_start|>system\n' + content + '<|im_end|>\n' }}
+  {%- elif _effort_prompt %}
+    {{- '<|im_start|>system\n' + _effort_prompt + '<|im_end|>\n' }}
+  {%- endif %}
+{%- endif %}
+
+{# --- 3. MULTI-TURN MESSAGE EXTRACTION & REASONING PRESERVATION --- #}
+{%- 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" %}
+    {%- set content = render_content(message.content, false)|trim %}
+    {%- if not(content.startswith('<tool_response>') and content.endswith('</tool_response>')) %}
+      {%- set ns.multi_step_tool = false %}
+      {%- set ns.last_query_index = index %}
+    {%- endif %}
+  {%- endif %}
+{%- endfor %}
+{%- if ns.multi_step_tool %}
+  {{- raise_exception('No user query found in messages.') }}
+{%- endif %}
+
+{%- for message in messages %}
+  {%- set content = render_content(message.content, true)|trim %}
+  {%- if message.role == "system" %}
+    {%- if not loop.first %}
+      {{- raise_exception('System message must be at the beginning.') }}
+    {%- endif %}
+  {%- elif message.role == "user" %}
+    {{- '<|im_start|>' + message.role + '\n' + content + '<|im_end|>\n' }}
+  {%- elif message.role == "assistant" %}
+    {%- set reasoning_content = '' %}
+    {%- if message.reasoning_content is string %}
+      {%- set reasoning_content = message.reasoning_content %}
+    {%- else %}
+      {%- if '</think>' in content %}
+        {%- set reasoning_content = content.split('</think>')[0].rstrip('\n').split('<think>')[-1].lstrip('\n') %}
+        {%- set content = content.split('</think>')[-1].lstrip('\n') %}
+      {%- endif %}
+    {%- endif %}
+    {%- set reasoning_content = reasoning_content|trim %}
+    
+    {# Honor preserve_thinking: keep prior thoughts if true, strip older thoughts if false #}
+    {%- if _preserve_thinking or loop.index0 > ns.last_query_index %}
+      {%- if reasoning_content %}
+        {{- '<|im_start|>' + message.role + '\n<think>\n' + reasoning_content + '\n</think>\n\n' + content }}
+      {%- else %}
+        {{- '<|im_start|>' + message.role + '\n' + content }}
+      {%- endif %}
+    {%- else %}
+      {{- '<|im_start|>' + message.role + '\n' + content }}
+    {%- endif %}
+
+    {# Function call serialization #}
+    {%- if message.tool_calls and message.tool_calls is iterable and message.tool_calls is not mapping %}
+      {%- for tool_call in message.tool_calls %}
+        {%- if tool_call.function is defined %}
+          {%- set tool_call = tool_call.function %}
+        {%- endif %}
+        {%- if loop.first %}
+          {%- if content|trim %}
+            {{- '\n\n<tool_call>\n<function=' + tool_call.name + '>\n' }}
+          {%- else %}
+            {{- '<tool_call>\n<function=' + tool_call.name + '>\n' }}
+          {%- endif %}
+        {%- else %}
+          {{- '\n<tool_call>\n<function=' + tool_call.name + '>\n' }}
+        {%- endif %}
+        {%- if tool_call.arguments is defined %}
+          {%- for args_name, args_value in tool_call.arguments|items %}
+            {{- '<parameter=' + args_name + '>\n' }}
+            {%- set args_value = args_value | tojson | safe if args_value is mapping or (args_value is sequence and args_value is not string) else args_value | string %}
+            {{- args_value }}
+            {{- '\n</parameter>\n' }}
+          {%- endfor %}
+        {%- endif %}
+        {{- '</function>\n</tool_call>' }}
+      {%- endfor %}
+    {%- endif %}
+    {{- '<|im_end|>\n' }}
+  {%- elif message.role == "tool" %}
+    {%- if loop.previtem and loop.previtem.role != "tool" %}
+      {{- '<|im_start|>user' }}
+    {%- endif %}
+    {{- '\n<tool_response>\n' }}
+    {{- content }}
+    {{- '\n</tool_response>' }}
+    {%- if not loop.last and loop.nextitem.role != "tool" %}
+      {{- '<|im_end|>\n' }}
+    {%- elif loop.last %}
+      {{- '<|im_end|>\n' }}
+    {%- endif %}
+  {%- else %}
+    {{- raise_exception('Unexpected message role: ' ~ message.role) }}
+  {%- endif %}
+{%- endfor %}
+
+{# --- 4. GENERATION PROMPT PREFILL --- #}
+{%- if add_generation_prompt %}
+  {{- '<|im_start|>assistant\n' }}
+  {%- if not _enable_thinking %}
+    {{- '<think>\n\n</think>\n\n' }}
+  {%- else %}
+    {{- '<think>\n' }}
+  {%- endif %}
+{%- endif %}