Feat/a2a request metadata

src/google/adk/a2a/converters/request_converter.py

@@ -57,12 +57,13 @@ def convert_a2a_request_to_adk_run_args(
   if not request.message:
     raise ValueError('Request message cannot be None')
 
+  metadata = getattr(request, 'metadata', None)
   return {
       'user_id': _get_user_id(request),
       'session_id': request.context_id,
       'new_message': genai_types.Content(
           role='user',
           parts=[part_converter(part) for part in request.message.parts],
       ),
-      'run_config': RunConfig(),
+      'run_config': RunConfig(metadata=metadata),
   }

src/google/adk/agents/invocation_context.py

@@ -202,6 +202,9 @@ class InvocationContext(BaseModel):
   plugin_manager: PluginManager = Field(default_factory=PluginManager)
   """The manager for keeping track of plugins in this invocation."""
 
+  a2a_metadata: Optional[dict[str, Any]] = None
+  """The metadata of the A2A request."""
+
   _invocation_cost_manager: _InvocationCostManager = PrivateAttr(
       default_factory=_InvocationCostManager
   )

src/google/adk/agents/run_config.py

@@ -17,6 +17,7 @@
 from enum import Enum
 import logging
 import sys
+from typing import Any
 from typing import Optional
 
 from google.genai import types
@@ -42,6 +43,9 @@ class RunConfig(BaseModel):
   )
   """The pydantic model config."""
 
+  metadata: Optional[dict[str, Any]] = None
+  """The metadata of the run."""
+
   speech_config: Optional[types.SpeechConfig] = None
   """Speech configuration for the live agent."""
 

src/google/adk/runners.py

@@ -848,6 +848,7 @@ def _new_invocation_context(
         live_request_queue=live_request_queue,
         run_config=run_config,
         resumability_config=self.resumability_config,
+        a2a_metadata=run_config.metadata,
     )
 
   def _new_invocation_context_for_live(