feat(telemetry): add user.id to gen_ai.user.message log records

src/google/adk/telemetry/_experimental_semconv.py

@@ -433,8 +433,14 @@ def _to_system_instructions(
 def set_operation_details_common_attributes(
     operation_details_common_attributes: MutableMapping[str, AttributeValue],
     attributes: Mapping[str, AttributeValue],
-):
+    log_only_attributes: Mapping[str, AttributeValue] | None = None,
+) -> None:
   operation_details_common_attributes.update(attributes)
+  if log_only_attributes and get_content_capturing_mode() in (
+      'EVENT_ONLY',
+      'SPAN_AND_EVENT',
+  ):
+    operation_details_common_attributes.update(log_only_attributes)
 
 
 async def set_operation_details_attributes_from_request(

src/google/adk/telemetry/tracing.py

@@ -66,6 +66,7 @@
 
 from .. import version
 from ..utils.model_name_utils import is_gemini_model
+from ._experimental_semconv import get_content_capturing_mode
 from ._experimental_semconv import is_experimental_semconv
 from ._experimental_semconv import maybe_log_completion_details
 from ._experimental_semconv import set_operation_details_attributes_from_request
@@ -556,20 +557,26 @@ def use_generate_content_span(
   common_attributes = {
       GEN_AI_AGENT_NAME: invocation_context.agent.name,
       GEN_AI_CONVERSATION_ID: invocation_context.session.id,
-      USER_ID: invocation_context.session.user_id,
       'gcp.vertex.agent.event_id': model_response_event.id,
       'gcp.vertex.agent.invocation_id': invocation_context.invocation_id,
   }
+  log_only_common_attributes = {}
+  if invocation_context.session.user_id is not None:
+    log_only_common_attributes[USER_ID] = invocation_context.session.user_id
   if (
       _is_gemini_agent(invocation_context.agent)
       and _instrumented_with_opentelemetry_instrumentation_google_genai()
   ):
-    with _use_extra_generate_content_attributes(common_attributes):
+    with _use_extra_generate_content_attributes(
+        common_attributes,
+        log_only_extra_attributes=log_only_common_attributes,
+    ):
       yield
   else:
     with _use_native_generate_content_span_stable_semconv(
         llm_request=llm_request,
         common_attributes=common_attributes,
+        log_only_common_attributes=log_only_common_attributes,
     ) as span:
       yield span.span
 
@@ -590,24 +597,32 @@ async def use_inference_span(
   common_attributes = {
       GEN_AI_AGENT_NAME: invocation_context.agent.name,
       GEN_AI_CONVERSATION_ID: invocation_context.session.id,
-      USER_ID: invocation_context.session.user_id,
       'gcp.vertex.agent.event_id': model_response_event.id,
       'gcp.vertex.agent.invocation_id': invocation_context.invocation_id,
   }
+  log_only_common_attributes = {}
+  if invocation_context.session.user_id is not None:
+    log_only_common_attributes[USER_ID] = invocation_context.session.user_id
   if (
       _is_gemini_agent(invocation_context.agent)
       and _instrumented_with_opentelemetry_instrumentation_google_genai()
   ):
-    with _use_extra_generate_content_attributes(common_attributes):
+    with _use_extra_generate_content_attributes(
+        common_attributes,
+        log_only_extra_attributes=log_only_common_attributes,
+    ):
       yield
   else:
     async with _use_native_generate_content_span(
         llm_request=llm_request,
         common_attributes=common_attributes,
+        log_only_common_attributes=log_only_common_attributes,
     ) as gc_span:
       if is_experimental_semconv():
         set_operation_details_common_attributes(
-            gc_span.operation_details_common_attributes, common_attributes
+            gc_span.operation_details_common_attributes,
+            common_attributes,
+            log_only_attributes=log_only_common_attributes,
         )
       try:
         yield gc_span
@@ -664,6 +679,7 @@ def _instrumented_with_opentelemetry_instrumentation_google_genai() -> bool:
 @contextmanager
 def _use_extra_generate_content_attributes(
     extra_attributes: Mapping[str, AttributeValue],
+    log_only_extra_attributes: Mapping[str, AttributeValue] | None = None,
 ):
   try:
     from opentelemetry.instrumentation.google_genai import GENERATE_CONTENT_EXTRA_ATTRIBUTES_CONTEXT_KEY
@@ -675,13 +691,25 @@ def _use_extra_generate_content_attributes(
         + ' Please upgrade to version to 0.6b0 or above.'
     )
     yield
+
     return
 
-  tok = otel_context.attach(
-      otel_context.set_value(
-          GENERATE_CONTENT_EXTRA_ATTRIBUTES_CONTEXT_KEY, extra_attributes
-      )
+  ctx = otel_context.set_value(
+      GENERATE_CONTENT_EXTRA_ATTRIBUTES_CONTEXT_KEY, extra_attributes
   )
+  if log_only_extra_attributes:
+    try:
+      from opentelemetry.instrumentation.google_genai import GENERATE_CONTENT_EVENT_ONLY_EXTRA_ATTRIBUTES_CONTEXT_KEY
+
+      ctx = otel_context.set_value(
+          GENERATE_CONTENT_EVENT_ONLY_EXTRA_ATTRIBUTES_CONTEXT_KEY,
+          log_only_extra_attributes,
+          context=ctx,
+      )
+    except (ImportError, AttributeError):
+      pass
+
+  tok = otel_context.attach(ctx)
   try:
     yield
   finally:
@@ -713,6 +741,7 @@ def _set_common_generate_content_attributes(
 def _use_native_generate_content_span_stable_semconv(
     llm_request: LlmRequest,
     common_attributes: Mapping[str, AttributeValue],
+    log_only_common_attributes: Mapping[str, AttributeValue] | None = None,
 ) -> Iterator[GenerateContentSpan]:
   with tracer.start_as_current_span(
       f"generate_content {llm_request.model or ''}"
@@ -734,12 +763,18 @@ def _use_native_generate_content_span_stable_semconv(
             attributes={GEN_AI_SYSTEM: _guess_gemini_system_name()},
         )
     )
+    user_message_attributes = {GEN_AI_SYSTEM: _guess_gemini_system_name()}
+    if _should_log_prompt_response_content() and log_only_common_attributes:
+      user_id = log_only_common_attributes.get(USER_ID)
+      if user_id is not None:
+        user_message_attributes[USER_ID] = user_id
+
     for content in llm_request.contents:
       otel_logger.emit(
           LogRecord(
               event_name='gen_ai.user.message',
               body={'content': _serialize_content_with_elision(content)},
-              attributes={GEN_AI_SYSTEM: _guess_gemini_system_name()},
+              attributes=user_message_attributes,
           )
       )
 
@@ -750,10 +785,13 @@ def _use_native_generate_content_span_stable_semconv(
 async def _use_native_generate_content_span(
     llm_request: LlmRequest,
     common_attributes: Mapping[str, AttributeValue],
+    log_only_common_attributes: Mapping[str, AttributeValue] | None = None,
 ) -> AsyncIterator[GenerateContentSpan]:
   if not is_experimental_semconv():
     with _use_native_generate_content_span_stable_semconv(
-        llm_request, common_attributes
+        llm_request,
+        common_attributes,
+        log_only_common_attributes=log_only_common_attributes,
     ) as gc_span:
       yield gc_span
     return

tests/unittests/telemetry/test_node_functional.py

@@ -255,7 +255,6 @@ async def some_node(ctx, node_input):
                                           ),
                                           'gen_ai.request.model': 'mock',
                                           'gen_ai.system': 'gemini',
-                                          'user.id': 'some_user',
                                       },
                                       children=[
                                           SpanDigest(
@@ -327,7 +326,6 @@ async def some_node(ctx, node_input):
                                           ),
                                           'gen_ai.request.model': 'mock',
                                           'gen_ai.system': 'gemini',
-                                          'user.id': 'some_user',
                                       },
                                   ),
                               ],