fix(qwen-agent): improve token and nested agent tracing

instrumentation-loongsuite/loongsuite-instrumentation-qwen-agent/CHANGELOG.md

@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+### Fixed
+
+- Record token usage from Qwen-Agent DashScope response metadata on streaming
+  and non-streaming chat spans.
+- Roll up child LLM token usage to Qwen-Agent invoke-agent spans, preserve
+  nested agent spans, and record only the final agent answer as output.
+
 ## Version 0.6.0 (2026-06-03)
 
 There are no changelog entries for this release.

instrumentation-loongsuite/loongsuite-instrumentation-qwen-agent/src/opentelemetry/instrumentation/qwen_agent/patch.py

@@ -37,6 +37,8 @@
 from opentelemetry.util.genai.types import Error
 
 from .utils import (
+    _apply_usage_to_llm_invocation,
+    _convert_qwen_agent_final_output_messages,
     _convert_qwen_messages_to_output_messages,
     _create_agent_invocation,
     _create_llm_invocation,
@@ -56,11 +58,14 @@
 _react_step_counter: ContextVar[int] = ContextVar(
     "qwen_react_step_counter", default=0
 )
+_active_agent_invocations: ContextVar[tuple[Any, ...]] = ContextVar(
+    "qwen_active_agent_invocations", default=()
+)
 
 # Reentrancy guards to prevent duplicate spans when Agent/BaseChatModel
 # are abstract classes and subclass calls super() (Proxy/Wrapper scenarios).
-_in_agent_run: ContextVar[bool] = ContextVar(
-    "_qwen_in_agent_run", default=False
+_agent_run_instance_stack: ContextVar[tuple[int, ...]] = ContextVar(
+    "_qwen_agent_run_instance_stack", default=()
 )
 _in_chat: ContextVar[bool] = ContextVar("_qwen_in_chat", default=False)
 _in_call_tool: ContextVar[bool] = ContextVar(
@@ -79,6 +84,42 @@ def _close_active_react_step(handler: ExtendedTelemetryHandler) -> None:
         _react_step_invocation.set(None)
 
 
+def _accumulate_llm_usage_on_active_agents(invocation: Any) -> None:
+    """Roll up child LLM token usage onto active invoke_agent spans.
+
+    The rollup is intentionally transitive: a parent agent records the total
+    nested LLM cost of its run, so consumers should not sum agent spans to
+    calculate global token usage.
+    """
+    active_agents = _active_agent_invocations.get()
+    if not active_agents:
+        return
+
+    for active_agent in active_agents:
+        if getattr(invocation, "input_tokens", None) is not None:
+            active_agent.input_tokens = (active_agent.input_tokens or 0) + (
+                invocation.input_tokens or 0
+            )
+        if getattr(invocation, "output_tokens", None) is not None:
+            active_agent.output_tokens = (active_agent.output_tokens or 0) + (
+                invocation.output_tokens or 0
+            )
+        if (
+            getattr(invocation, "usage_cache_read_input_tokens", None)
+            is not None
+        ):
+            active_agent.usage_cache_read_input_tokens = (
+                active_agent.usage_cache_read_input_tokens or 0
+            ) + (invocation.usage_cache_read_input_tokens or 0)
+        if (
+            getattr(invocation, "usage_cache_creation_input_tokens", None)
+            is not None
+        ):
+            active_agent.usage_cache_creation_input_tokens = (
+                active_agent.usage_cache_creation_input_tokens or 0
+            ) + (invocation.usage_cache_creation_input_tokens or 0)
+
+
 def wrap_agent_run(
     wrapped, instance, args, kwargs, handler: ExtendedTelemetryHandler
 ):
@@ -93,18 +134,20 @@ def wrap_agent_run(
     """
     # Reentrancy guard: prevent duplicate spans in Proxy/Wrapper scenarios
     # where a subclass calls super().run().
-    if _in_agent_run.get():
+    run_stack = _agent_run_instance_stack.get()
+    instance_id = id(instance)
+    if instance_id in run_stack:
         yield from wrapped(*args, **kwargs)
         return
-    run_token = _in_agent_run.set(True)
+    run_token = _agent_run_instance_stack.set(run_stack + (instance_id,))
 
     messages = args[0] if args else kwargs.get("messages", [])
 
     try:
         invocation = _create_agent_invocation(instance, messages)
     except Exception as e:
         logger.debug(f"Failed to create agent invocation: {e}")
-        _in_agent_run.reset(run_token)
+        _agent_run_instance_stack.reset(run_token)
         yield from wrapped(*args, **kwargs)
         return
 
@@ -113,6 +156,9 @@ def wrap_agent_run(
     mode_token = _react_mode.set(is_react)
     counter_token = _react_step_counter.set(0)
     step_token = _react_step_invocation.set(None)
+    active_agent_token = _active_agent_invocations.set(
+        _active_agent_invocations.get() + (invocation,)
+    )
 
     handler.start_invoke_agent(invocation)
 
@@ -125,7 +171,7 @@ def wrap_agent_run(
         # Extract output from last yielded response
         if last_response:
             invocation.output_messages = (
-                _convert_qwen_messages_to_output_messages(last_response)
+                _convert_qwen_agent_final_output_messages(last_response)
             )
 
         # Close the last react_step span before closing invoke_agent.
@@ -153,7 +199,8 @@ def wrap_agent_run(
         _react_step_counter.reset(counter_token)
         _react_step_invocation.reset(step_token)
         _react_mode.reset(mode_token)
-        _in_agent_run.reset(run_token)
+        _active_agent_invocations.reset(active_agent_token)
+        _agent_run_instance_stack.reset(run_token)
 
 
 def wrap_chat_model_chat(
@@ -206,6 +253,7 @@ def wrap_chat_model_chat(
             else:
                 # Non-streaming: result is List[Message]
                 if result:
+                    _apply_usage_to_llm_invocation(invocation, result)
                     invocation.output_messages = (
                         _convert_qwen_messages_to_output_messages(result)
                     )
@@ -225,6 +273,7 @@ def wrap_chat_model_chat(
                             invocation.finish_reasons = ["tool_calls"]
                             break
 
+                _accumulate_llm_usage_on_active_agents(invocation)
                 handler.stop_llm(invocation)
                 return result
 
@@ -246,6 +295,7 @@ def _wrap_streaming_llm_response(
             if first_token:
                 invocation.monotonic_first_token_s = timeit.default_timer()
                 first_token = False
+            _apply_usage_to_llm_invocation(invocation, response)
             last_response = response
             yield response
 
@@ -269,6 +319,7 @@ def _wrap_streaming_llm_response(
                     invocation.finish_reasons = ["tool_calls"]
                     break
 
+        _accumulate_llm_usage_on_active_agents(invocation)
         handler.stop_llm(invocation)
 
     except GeneratorExit as e:

instrumentation-loongsuite/loongsuite-instrumentation-qwen-agent/src/opentelemetry/instrumentation/qwen_agent/utils.py

@@ -102,6 +102,183 @@ def _extract_content_text(content: Any) -> str:
     return str(content) if content else ""
 
 
+def _field_value(value: Any, *names: str) -> Any:
+    """Read the first present field from a mapping or SDK response object."""
+    if value is None:
+        return None
+
+    for name in names:
+        if isinstance(value, dict):
+            if name in value:
+                return value[name]
+            continue
+
+        try:
+            attr_value = getattr(value, name)
+        except Exception:
+            attr_value = None
+        if attr_value is not None:
+            return attr_value
+
+        get_method = getattr(value, "get", None)
+        if callable(get_method):
+            try:
+                got_value = get_method(name)
+            except Exception:
+                got_value = None
+            if got_value is not None:
+                return got_value
+
+    return None
+
+
+def _int_value(value: Any) -> Optional[int]:
+    if value is None:
+        return None
+    try:
+        return int(value)
+    except (TypeError, ValueError):
+        return None
+
+
+def _usage_token_values(usage: Any) -> Dict[str, int]:
+    if usage is None:
+        return {}
+
+    input_tokens = _int_value(
+        _field_value(usage, "input_tokens", "prompt_tokens")
+    )
+    output_tokens = _int_value(
+        _field_value(usage, "output_tokens", "completion_tokens")
+    )
+    cache_read_tokens = _int_value(
+        _field_value(usage, "cache_read_input_tokens", "cached_prompt_tokens")
+    )
+    cache_creation_tokens = _int_value(
+        _field_value(usage, "cache_creation_input_tokens")
+    )
+
+    for detail_name in ("prompt_tokens_details", "input_tokens_details"):
+        details = _field_value(usage, detail_name)
+        if details is not None and cache_read_tokens is None:
+            cache_read_tokens = _int_value(
+                _field_value(details, "cached_tokens")
+            )
+
+    values: Dict[str, int] = {}
+    if input_tokens is not None:
+        values["input_tokens"] = input_tokens
+    if output_tokens is not None:
+        values["output_tokens"] = output_tokens
+    if cache_read_tokens is not None and cache_read_tokens > 0:
+        values["cache_read_input_tokens"] = cache_read_tokens
+    if cache_creation_tokens is not None and cache_creation_tokens > 0:
+        values["cache_creation_input_tokens"] = cache_creation_tokens
+
+    return values
+
+
+def _usage_score(usage_values: Dict[str, int]) -> int:
+    return (usage_values.get("input_tokens") or 0) + (
+        usage_values.get("output_tokens") or 0
+    )
+
+
+def _usage_sources(value: Any) -> List[Any]:
+    sources = []
+    usage = _field_value(value, "usage")
+    if usage is not None:
+        sources.append(usage)
+
+    extra = _field_value(value, "extra")
+    if extra is not None:
+        extra_usage = _field_value(extra, "usage", "usage_metadata")
+        if extra_usage is not None:
+            sources.append(extra_usage)
+
+        service_info = _field_value(extra, "model_service_info")
+        if service_info is not None:
+            sources.append(service_info)
+
+    service_info = _field_value(value, "model_service_info")
+    if service_info is not None:
+        sources.append(service_info)
+
+    return sources
+
+
+def _extract_usage_values(value: Any, depth: int = 0) -> Dict[str, int]:
+    """Extract token usage from qwen-agent Message/extra/model_service_info."""
+    if value is None or depth > 4:
+        return {}
+
+    best_values: Dict[str, int] = {}
+    values = _usage_token_values(value)
+    if values:
+        best_values = values
+
+    if isinstance(value, (list, tuple)):
+        for item in reversed(value):
+            item_values = _extract_usage_values(item, depth + 1)
+            if _usage_score(item_values) > _usage_score(best_values):
+                best_values = item_values
+        return best_values
+
+    for source in _usage_sources(value):
+        source_values = _extract_usage_values(source, depth + 1)
+        if _usage_score(source_values) > _usage_score(best_values):
+            best_values = source_values
+
+    return best_values
+
+
+def _apply_usage_to_llm_invocation(
+    invocation: LLMInvocation, value: Any
+) -> None:
+    """Apply qwen-agent token usage metadata to an LLMInvocation.
+
+    Qwen-Agent stores DashScope responses under Message.extra["model_service_info"]
+    for both streaming and non-streaming calls. Streaming chunks can carry
+    cumulative usage, so only replace existing values when the candidate usage
+    has at least as many observed tokens as the current invocation.
+    """
+    usage_values = _extract_usage_values(value)
+    if not usage_values:
+        return
+
+    current_score = (invocation.input_tokens or 0) + (
+        invocation.output_tokens or 0
+    )
+    if current_score and _usage_score(usage_values) < current_score:
+        return
+
+    if "input_tokens" in usage_values:
+        invocation.input_tokens = usage_values["input_tokens"]
+    if "output_tokens" in usage_values:
+        invocation.output_tokens = usage_values["output_tokens"]
+    if "cache_read_input_tokens" in usage_values:
+        invocation.usage_cache_read_input_tokens = usage_values[
+            "cache_read_input_tokens"
+        ]
+    if "cache_creation_input_tokens" in usage_values:
+        invocation.usage_cache_creation_input_tokens = usage_values[
+            "cache_creation_input_tokens"
+        ]
+
+
+def apply_token_usage_from_qwen_messages(
+    invocation: LLMInvocation,
+    messages: Any,
+) -> None:
+    """Populate token usage from qwen-agent Message metadata.
+
+    Kept as a compatibility entrypoint for callers that used the previous
+    helper name; the instrumentation wrapper now calls the generic extractor
+    directly so it can process individual streaming chunks.
+    """
+    _apply_usage_to_llm_invocation(invocation, messages)
+
+
 def _convert_qwen_messages_to_input_messages(
     messages: Any,
 ) -> List[InputMessage]:
@@ -291,6 +468,36 @@ def _convert_qwen_messages_to_output_messages(
     return output_messages
 
 
+def _convert_qwen_agent_final_output_messages(
+    messages: Any,
+) -> List[OutputMessage]:
+    """Convert only the final qwen-agent answer to GenAI OutputMessage format."""
+    if not messages:
+        return []
+
+    if not isinstance(messages, list):
+        messages = [messages]
+
+    for msg in reversed(messages):
+        try:
+            role = _field_value(msg, "role") or "assistant"
+            function_call = _field_value(msg, "function_call")
+            content = _field_value(msg, "content") or ""
+
+            if role in ("function", "tool") or function_call:
+                continue
+
+            text = _extract_content_text(content)
+            if text:
+                return _convert_qwen_messages_to_output_messages([msg])
+        except Exception as e:
+            logger.debug(f"Error extracting final agent output message: {e}")
+            continue
+
+    logger.debug("No final qwen-agent assistant text output message found")
+    return []
+
+
 def _get_tool_definitions(
     functions: Optional[List[Dict]],
 ) -> Optional[List[FunctionToolDefinition]]: