{#- ============================================================================
    Qwen Chat Template v1.1 (Stable Agentic Version + JSON Escaping Fix)
    
    FIXES APPLIED IN v1.1:
    1. Added strict JSON escaping instructions to Section 7 to prevent the LLM
       from generating raw newlines and quotes inside JSON tool arguments.
       
    FIXES APPLIED IN v1.0:
    1. Kept v0.9 Audio support and strict iterable type checks.
    2. REMOVED URL text injection before vision/audio pads.
    3. REMOVED Tool Call ID injection (violates Qwen's native JSON schema).
    4. RE-APPLIED Context Breakout Prevention (tojson on tool responses).
    5. RE-APPLIED Think-Mode Tool Call Prevention (Instruction in Section 7).
============================================================================ -#}

{%- macro raise_exception(message) -%}
  {{- '\n[ERROR: ' ~ message ~ ']' -}}
{%- endmacro -%}

{#- ===== SECTION 1A: MACRO render_content ===== -#}
{%- macro render_content(content, count_vision=false, is_system_content=false) -%}
  {%- if is_system_content and content is iterable and content is not mapping and content is not string and content is not none -%}
    {%- for item in content -%}
      {%- if item.type == 'image' or 'image' in item or 'image_url' in item -%}
        {{- raise_exception('System message cannot contain images.') -}}
      {%- endif -%}
      {%- if item.type == 'video' or 'video' in item -%}
        {{- raise_exception('System message cannot contain videos.') -}}
      {%- endif -%}
    {%- endfor -%}
  {%- endif -%}

  {%- if content is none or content is defined == false -%}
    {{- '' -}}
  {%- elif content is string -%}
    {{- content -}}
  {%- elif content is not mapping and content is iterable and content is not string -%}
    {%- for item in content -%}
      {%- if item.type == 'image' or 'image' in item or 'image_url' in item -%}
        {%- if count_vision -%}{%- set ns.image_count = ns.image_count + 1 -%}{%- endif -%}
        {%- if add_vision_id is defined and add_vision_id -%}
          {{- 'Picture ' ~ ns.image_count ~ ': ' -}}
        {%- endif -%}
        {{- '<|vision_start|><|image_pad|><|vision_end|>' -}}
      {%- elif item.type == 'audio' or 'audio' in item or 'audio_url' in item -%}
        {%- if add_vision_id is defined and add_vision_id -%}
          {{- 'Audio ' ~ ns.image_count ~ ': ' -}}
        {%- endif -%}
        {{- '<|audio_pad|><|audio_end|>' -}}
      {%- elif item.type == 'video' or 'video' in item -%}
        {%- if count_vision -%}{%- set ns.video_count = ns.video_count + 1 -%}{%- endif -%}
        {%- if add_vision_id is defined and add_vision_id -%}
          {{- 'Video ' ~ ns.video_count ~ ': ' -}}
        {%- endif -%}
        {{- '<|vision_start|><|video_pad|><|vision_end|>' -}}
      {%- elif item.type == 'text' or 'text' in item -%}
        {{- item.text -}}
      {%- else -%}
        {{- raise_exception('Unexpected content type in message content.') -}}
      {%- endif -%}
    {%- endfor -%}
  {%- elif content is not none and content is defined -%}
    {{- raise_exception('Unexpected content type.') -}}
  {%- endif -%}
{%- endmacro -%}

{#- ===== SECTION 1B: MACRO detect_tool_error ===== -#}
{%- macro detect_tool_error(content) -%}
  {%- set content = content if content is string else '' -%}
  {%- set content_lower = content | lower -%}
  {%- set content_length = content | length -%}
  
  {%- if content_length < 500
      and '$ ' not in content
      and 'took ' not in content_lower
      and ('"error":' in content_lower or 'error:' in content_lower 
           or 'exception:' in content_lower or 'traceback' in content_lower 
           or 'command not found' in content_lower or 'invalid syntax' in content_lower 
           or 'failed to' in content_lower or 'permission denied' in content_lower) -%}
    {%- set ns.last_tool_failed = true -%}
    {%- set ns.consecutive_failures = ns.consecutive_failures + 1 -%}
  {%- else -%}
    {%- set ns.last_tool_failed = false -%}
    {%- set ns.consecutive_failures = 0 -%}
  {%- endif -%}
{%- endmacro -%}

{#- ===== SECTION 2: NAMESPACE INITIALISATION ===== -#}
{%- set ns = namespace(
    enable_thinking=true,
    preserve_thinking=true,
    image_count=0,
    video_count=0,
    consecutive_failures=0,
    last_tool_failed=false
) -%}

{%- if enable_thinking is defined -%}
  {%- if enable_thinking -%}
    {%- set ns.enable_thinking = true -%}
  {%- else -%}
    {%- set ns.enable_thinking = false -%}
  {%- endif -%}
{%- endif -%}

{%- if preserve_thinking is defined -%}
  {%- if not preserve_thinking -%}
    {%- set ns.enable_thinking = false -%}
    {%- set ns.preserve_thinking = false -%}
  {%- else -%}
    {%- set ns.preserve_thinking = true -%}
  {%- endif -%}
{%- endif -%}

{#- ===== SECTION 3: PRE-SCAN ===== -#}
{%- for i in range(messages | length) -%}
  {%- set _msg = messages[i] -%}
  {%- if _msg.role == 'user' -%}
    {%- set _u = _msg.content if _msg.content is string else '' -%}
    {%- if _u.rstrip().endswith('/no_think') -%}
      {%- set ns.enable_thinking = false -%}
    {%- elif _u.rstrip().endswith('/think') -%}
      {%- set ns.enable_thinking = true -%}
    {%- endif -%}
  {%- elif _msg.role == 'system' or _msg.role == 'developer' -%}
    {%- set _s = _msg.content if _msg.content is string else '' -%}
    {%- if '<|think_off|>' in _s -%}
      {%- set ns.enable_thinking = false -%}
    {%- elif '<|think_on|>' in _s -%}
      {%- set ns.enable_thinking = true -%}
    {%- endif -%}
  {%- endif -%}
{%- endfor -%}

{#- ===== SECTION 4: VALIDATE MESSAGES ===== -#}
{%- if not messages -%}
  {{- raise_exception('No messages provided.') -}}
{%- endif -%}

{#- ===== SECTION 5: COLLECT SYSTEM CONTENT ===== -#}
{%- set ns_sys = namespace(content='') -%}
{%- for msg in messages -%}
  {%- if msg.role == 'system' or msg.role == 'developer' -%}
    {%- set _c = render_content(msg.content | default(''), false, true) | trim -%}
    {%- set _c = _c | replace('<|think_off|>', '') | replace('<|think_on|>', '') | trim -%}
    {%- if _c -%}
      {%- if ns_sys.content == '' -%}
        {%- set ns_sys.content = _c -%}
      {%- else -%}
        {%- set ns_sys.content = ns_sys.content + '\n\n' + _c -%}
      {%- endif -%}
    {%- endif -%}
  {%- endif -%}
{%- endfor -%}

{#- ===== SECTION 6: BUILD TOOLS LIST ===== -#}
{%- set _has_tools = tools is defined and tools -%}
{%- if _has_tools -%}
  {%- set ns_tb = namespace(list=[]) -%}
  {%- for tool in tools -%}
    {%- if tool.function is defined -%}
      {%- set ns_tb.list = ns_tb.list + [tool] -%}
    {%- else -%}
      {%- set ns_tb.list = ns_tb.list + [{"type": "function", "function": tool}] -%}
    {%- endif -%}
  {%- endfor -%}
{%- endif -%}

{#- ===== SECTION 7: OUTPUT SYSTEM TURN ===== -#}
{%- if ns_sys.content or _has_tools -%}
  {{- '<|im_start|>system\n' -}}
  {%- if ns_sys.content -%}
    {{- ns_sys.content -}}
    {%- if _has_tools -%}{{- '\n\n' -}}{%- endif -%}
  {%- endif -%}
  {%- if _has_tools -%}
    {{- '# Tools\n\nYou may call one or more functions to assist with the user query.\n\nYou are provided with function signatures within <tools></tools> XML tags:\n<tools>\n' -}}
    {%- for tool in ns_tb.list -%}
      {{- tool | tojson -}}
      {%- if not loop.last -%}{{- '\n' -}}{%- endif -%}
    {%- endfor -%}
    {#- FIX v1.1: Added JSON strict escaping warnings to critical instructions -#}
    {{- '\n</tools>\n\nFor each function call, return a json object with function name and arguments within <tool_call></tool_call> XML tags:\n<tool_call>\n{"name": <function-name>, "arguments": <args-json-object>}\n</tool_call>\n\nCRITICAL INSTRUCTIONS:\n1. You MUST NOT output <tool_call> tags while inside <think> tags. Complete your reasoning and output </think> FIRST, then initiate your tool calls.\n2. When passing multi-line code or text containing quotes into a JSON argument, you MUST strictly escape all newlines as \\n and quotes as \\". Failure to escape will invalidate the JSON and crash the system.' -}}
  {%- endif -%}
  {{- '<|im_end|>\n' -}}
{%- endif -%}

{#- ===== SECTION 8: MAIN MESSAGE LOOP ===== -#}
{%- for message in messages -%}

  {%- if message.role == 'system' or message.role == 'developer' -%}

  {%- elif message.role == 'user' -%}
    {%- set _uc = render_content(message.content | default(''), true, false) -%}
    {{- '<|im_start|>user\n' + _uc + '<|im_end|>\n' -}}

  {%- elif message.role == 'assistant' -%}
    {%- if message.content is defined and message.content is string -%}
      {%- set _ac = message.content -%}
    {%- elif message.content is defined and message.content is iterable and message.content is not mapping and message.content is not string -%}
      {%- set _ac = render_content(message.content, false, false) -%}
    {%- else -%}
      {%- set _ac = '' -%}
    {%- endif -%}

    {%- if message.reasoning_content is defined and message.reasoning_content is string
        and message.reasoning_content | trim
        and '<think>' not in _ac -%}
      {%- set _ac = '<think>\n' + message.reasoning_content | trim + '\n</think>\n\n' + _ac -%}
    {%- endif -%}

    {%- set _tc = message.tool_calls if message.tool_calls is defined and message.tool_calls is iterable and message.tool_calls is not string else [] -%}

    {%- if _tc and '<tool_call>' in _ac -%}
      {%- set _ac = _ac.split('<tool_call>')[0] | trim -%}
    {%- endif -%}

    {%- set _show_think = false -%}
    {%- if _tc -%}
      {%- set _show_think = true -%}
    {%- elif ns.preserve_thinking -%}
      {%- set _show_think = true -%}
    {%- elif loop.last -%}
      {%- set _show_think = ns.enable_thinking -%}
    {%- endif -%}

    {%- if not _show_think -%}
      {%- set _think_end = '' -%}
      {%- if '</think>' in _ac -%}
        {%- set _think_end = '</think>' -%}
      {%- elif '</thinking>' in _ac -%}
        {%- set _think_end = '</thinking>' -%}
      {%- elif '</ think>' in _ac -%}
        {%- set _think_end = '</ think>' -%}
      {%- elif '</think >' in _ac -%}
        {%- set _think_end = '</think >' -%}
      {%- endif -%}
      {%- if _think_end -%}
        {%- set _ac = _ac.split(_think_end)[-1].lstrip('\n') -%}
      {%- endif -%}
    {%- elif not _tc and loop.last and '<think>' not in _ac and not ns.enable_thinking -%}
      {%- set _ac = '<think>\n\n</think>\n\n' + _ac -%}
    {%- endif -%}

    {{- '<|im_start|>assistant\n' -}}
    {%- if _ac -%}
      {{- _ac -}}
      {%- if _tc -%}{{- '\n' -}}{%- endif -%}
    {%- endif -%}

    {%- if _tc -%}
      {%- for tc in _tc -%}
        {{- '<tool_call>\n' -}}
        {{- '{"name": ' -}}{{- tc.function.name | tojson -}}
        {%- if tc.function.arguments is string -%}
          {{- ', "arguments": ' + tc.function.arguments -}}
        {%- else -%}
          {{- ', "arguments": ' -}}{{- tc.function.arguments | tojson -}}
        {%- endif -%}
        {{- '}' -}}
        {%- if not loop.last -%}
          {{- '\n</tool_call>\n' -}}
        {%- else -%}
          {{- '\n</tool_call>' -}}
        {%- endif -%}
      {%- endfor -%}
    {%- endif -%}
    {{- '<|im_end|>\n' -}}

  {#- 8d: Tool results -#}
  {%- elif message.role == 'tool' -%}
    {%- set _prev_role = messages[loop.index0 - 1].role if loop.index0 > 0 else '' -%}
    {%- set _next_role = messages[loop.index0 + 1].role if not loop.last else '' -%}
    
    {%- set _tool_content = message.content | default('') -%}
    {{- detect_tool_error(_tool_content) -}}

    {%- if _prev_role != 'tool' -%}
      {{- '<|im_start|>user\n' -}}
    {%- endif -%}
    {{- '<tool_response>\n' -}}
    
    {{- '{"result": ' ~ _tool_content | string | tojson ~ '}' -}}
    
    {%- if ns.last_tool_failed -%}
      {%- if ns.consecutive_failures >= 2 -%}
        {{- '\n\n[SYSTEM WARNING: ' ~ ns.consecutive_failures ~ ' consecutive tool errors detected. Your previous approach is incorrect.]' -}}
      {%- else -%}
        {{- '\n\n[SYSTEM WARNING: The previous tool call returned an error. Diagnose the failure and retry with corrected arguments.]' -}}
      {%- endif -%}
    {%- endif -%}

    {%- if _next_role == 'tool' -%}
      {{- '\n</tool_response>\n' -}}
    {%- else -%}
      {{- '\n</tool_response>' -}}
      {{- '<|im_end|>\n' -}}
    {%- endif -%}

  {%- else -%}
    {{- raise_exception('Unexpected message role: ' + message.role) -}}
  {%- endif -%}

{%- endfor -%}

{#- ===== SECTION 9: GENERATION PROMPT ===== -#}
{%- if add_generation_prompt -%}
  {{- '<|im_start|>assistant\n' -}}
  {%- if ns.enable_thinking -%}
    {{- '<think>\n' -}}
  {%- else -%}
    {{- '<think>\n\n</think>\n\n' -}}
  {%- endif -%}
{%- endif -%}