Updated typing on request context for the server to use server session

Author: jerome3o-anthropic

src/mcp/server/fastmcp/server.py

@@ -25,6 +25,7 @@
 from mcp.server.fastmcp.utilities.logging import configure_logging, get_logger
 from mcp.server.fastmcp.utilities.types import Image
 from mcp.server.lowlevel.helper_types import ReadResourceContents
+<<<<<<< Updated upstream
 from mcp.server.lowlevel.server import (
     LifespanResultT,
 )
@@ -34,6 +35,9 @@
 from mcp.server.lowlevel.server import (
     lifespan as default_lifespan,
 )
+=======
+from mcp.server.session import ServerSession
+>>>>>>> Stashed changes
 from mcp.server.sse import SseServerTransport
 from mcp.server.stdio import stdio_server
 from mcp.shared.context import RequestContext
@@ -597,7 +601,7 @@ def my_tool(x: int, ctx: Context) -> str:
     The context is optional - tools that don't need it can omit the parameter.
     """
 
-    _request_context: RequestContext | None
+    _request_context: RequestContext[ServerSession] | None
     _fastmcp: FastMCP | None
 
     def __init__(