refactor(python): add future annotations and remove quoted types

Add `from __future__ import annotations` to 93 package files that
used quoted string annotations, then run pyupgrade --py310-plus to
remove the now-unnecessary quotes.

Fixes #3578

Author: eavanvalkenburg

python/packages/a2a/agent_framework_a2a/_agent.py

@@ -1,5 +1,7 @@
 # Copyright (c) Microsoft. All rights reserved.
 
+from __future__ import annotations
+
 import base64
 import json
 import re
@@ -169,7 +171,7 @@ def _create_timeout_config(self, timeout: float | httpx.Timeout | None) -> httpx
         msg = f"Invalid timeout type: {type(timeout)}. Expected float, httpx.Timeout, or None."
         raise TypeError(msg)
 
-    async def __aenter__(self) -> "A2AAgent":
+    async def __aenter__(self) -> A2AAgent:
         """Async context manager entry."""
         return self
 

python/packages/ag-ui/agent_framework_ag_ui/_client.py

@@ -2,6 +2,8 @@
 
 """AG-UI Chat Client implementation."""
 
+from __future__ import annotations
+
 import json
 import logging
 import sys
@@ -216,7 +218,7 @@ def __init__(
         http_client: httpx.AsyncClient | None = None,
         timeout: float = 60.0,
         additional_properties: dict[str, Any] | None = None,
-        middleware: Sequence["ChatAndFunctionMiddlewareTypes"] | None = None,
+        middleware: Sequence[ChatAndFunctionMiddlewareTypes] | None = None,
         function_invocation_configuration: FunctionInvocationConfiguration | None = None,
         **kwargs: Any,
     ) -> None:

python/packages/ag-ui/agent_framework_ag_ui/_endpoint.py

@@ -2,6 +2,8 @@
 
 """FastAPI endpoint creation for AG-UI agents."""
 
+from __future__ import annotations
+
 import copy
 import logging
 from collections.abc import AsyncGenerator, Sequence
@@ -77,7 +79,7 @@ async def agent_endpoint(request_body: AGUIRequest) -> StreamingResponse | dict[
             )
             logger.info(f"Received request at {path}: {input_data.get('run_id', 'no-run-id')}")
 
-            async def event_generator() -> AsyncGenerator[str, None]:
+            async def event_generator() -> AsyncGenerator[str]:
                 encoder = EventEncoder()
                 event_count = 0
                 async for event in wrapped_agent.run_agent(input_data):

python/packages/ag-ui/agent_framework_ag_ui/_event_converters.py

@@ -2,6 +2,8 @@
 
 """Event converter for AG-UI protocol events to Agent Framework types."""
 
+from __future__ import annotations
+
 from typing import Any
 
 from agent_framework import (

python/packages/ag-ui/agent_framework_ag_ui/_http_service.py

@@ -2,6 +2,8 @@
 
 """HTTP service for AG-UI protocol communication."""
 
+from __future__ import annotations
+
 import json
 import logging
 from collections.abc import AsyncIterable
@@ -148,7 +150,7 @@ async def close(self) -> None:
         if self._owns_client and self.http_client:
             await self.http_client.aclose()
 
-    async def __aenter__(self) -> "AGUIHttpService":
+    async def __aenter__(self) -> AGUIHttpService:
         """Enter async context manager."""
         return self
 

python/packages/ag-ui/agent_framework_ag_ui/_message_adapters.py

@@ -2,6 +2,8 @@
 
 """Message format conversion between AG-UI and Agent Framework."""
 
+from __future__ import annotations
+
 import json
 import logging
 from typing import Any, cast

python/packages/ag-ui/agent_framework_ag_ui/_orchestration/_helpers.py

@@ -6,6 +6,8 @@
 This module retains utilities that may be useful for testing or extensions.
 """
 
+from __future__ import annotations
+
 import json
 import logging
 from typing import Any

python/packages/ag-ui/agent_framework_ag_ui/_orchestration/_predictive_state.py

@@ -2,6 +2,8 @@
 
 """Predictive state handling utilities."""
 
+from __future__ import annotations
+
 import json
 import logging
 import re

python/packages/ag-ui/agent_framework_ag_ui/_orchestration/_tooling.py

@@ -2,6 +2,8 @@
 
 """Tool handling helpers."""
 
+from __future__ import annotations
+
 import logging
 from typing import TYPE_CHECKING, Any
 
@@ -29,7 +31,7 @@ def _collect_mcp_tool_functions(mcp_tools: list[Any]) -> list[Any]:
     return functions
 
 
-def collect_server_tools(agent: "SupportsAgentRun") -> list[Any]:
+def collect_server_tools(agent: SupportsAgentRun) -> list[Any]:
     """Collect server tools from an agent.
 
     This includes both regular tools from default_options and MCP tools.
@@ -64,7 +66,7 @@ def collect_server_tools(agent: "SupportsAgentRun") -> list[Any]:
     return server_tools
 
 
-def register_additional_client_tools(agent: "SupportsAgentRun", client_tools: list[Any] | None) -> None:
+def register_additional_client_tools(agent: SupportsAgentRun, client_tools: list[Any] | None) -> None:
     """Register client tools as additional declaration-only tools to avoid server execution.
 
     Args:

python/packages/ag-ui/agent_framework_ag_ui/_run.py

@@ -2,6 +2,8 @@
 
 """Simplified AG-UI orchestration - single linear flow."""
 
+from __future__ import annotations
+
 import json
 import logging
 import uuid
@@ -742,8 +744,8 @@ def _build_messages_snapshot(
 async def run_agent_stream(
     input_data: dict[str, Any],
     agent: SupportsAgentRun,
-    config: "AgentConfig",
-) -> "AsyncGenerator[BaseEvent, None]":
+    config: AgentConfig,
+) -> AsyncGenerator[BaseEvent]:
     """Run agent and yield AG-UI events.
 
     This is the single entry point for all AG-UI agent runs. It follows a simple