feat: Add ability to send state change with message

PiperOrigin-RevId: 783589708

Author: google-genai-bot

src/google/adk/cli/fast_api.py

@@ -177,7 +177,6 @@ class AgentRunRequest(common.BaseModel):
   session_id: str
   new_message: types.Content
   streaming: bool = False
-  state_delta: Optional[dict[str, Any]] = None
 
 
 class AddSessionToEvalSetRequest(common.BaseModel):
@@ -878,7 +877,6 @@ async def event_generator():
             user_id=req.user_id,
             session_id=req.session_id,
             new_message=req.new_message,
-            state_delta=req.state_delta,
             run_config=RunConfig(streaming_mode=stream_mode),
         ):
           # Format as SSE data

src/google/adk/runners.py

@@ -17,14 +17,11 @@
 import asyncio
 import logging
 import queue
-import time
-from typing import Any
 from typing import AsyncGenerator
 from typing import Callable
 from typing import Generator
 from typing import List
 from typing import Optional
-import uuid
 import warnings
 
 from google.genai import types
@@ -41,7 +38,6 @@
 from .auth.credential_service.base_credential_service import BaseCredentialService
 from .code_executors.built_in_code_executor import BuiltInCodeExecutor
 from .events.event import Event
-from .events.event import EventActions
 from .flows.llm_flows.functions import find_matching_function_call
 from .memory.base_memory_service import BaseMemoryService
 from .memory.in_memory_memory_service import InMemoryMemoryService
@@ -178,7 +174,6 @@ async def run_async(
       user_id: str,
       session_id: str,
       new_message: types.Content,
-      state_delta: Optional[dict[str, Any]] = None,
       run_config: RunConfig = RunConfig(),
   ) -> AsyncGenerator[Event, None]:
     """Main entry method to run the agent in this runner.
@@ -221,7 +216,6 @@ async def run_async(
             new_message,
             invocation_context,
             run_config.save_input_blobs_as_artifacts,
-            state_delta,
         )
 
       invocation_context.agent = self._find_agent_to_run(session, root_agent)
@@ -290,7 +284,6 @@ async def _append_new_message_to_session(
       new_message: types.Content,
       invocation_context: InvocationContext,
       save_input_blobs_as_artifacts: bool = False,
-      state_delta: Optional[dict[str, Any]] = None,
   ):
     """Appends a new message to the session.
 
@@ -322,19 +315,11 @@ async def _append_new_message_to_session(
             text=f'Uploaded file: {file_name}. It is saved into artifacts'
         )
     # Appends only. We do not yield the event because it's not from the model.
-    if state_delta:
-      event = Event(
-          invocation_id=invocation_context.invocation_id,
-          author='user',
-          actions=EventActions(state_delta=state_delta),
-          content=new_message,
-      )
-    else:
-      event = Event(
-          invocation_id=invocation_context.invocation_id,
-          author='user',
-          content=new_message,
-      )
+    event = Event(
+        invocation_id=invocation_context.invocation_id,
+        author='user',
+        content=new_message,
+    )
     await self.session_service.append_event(session=session, event=event)
 
   async def run_live(