build: complete upgrade to fastapi 0.141, mcp sdk v2, fastmcp 4 and httpx2

src/wf_mcp/broker/artifact_tools.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 from typing import Any
 
-from mcp.server.fastmcp import FastMCP
+from mcp.server.mcpserver import MCPServer
 
 from wf_api.models import (
     DeleteDeploymentResult,
@@ -20,7 +20,7 @@ from ..workflow_surface.models import RunDeploymentResult
 from .service import WfMcpService
 
 
-def register_artifact_tools(server: FastMCP, service: WfMcpService) -> None:
+def register_artifact_tools(server: MCPServer, service: WfMcpService) -> None:
     """Register stable MCP tools for saved workflow artifact inspection."""
     handlers = WorkflowSurfaceHandlers(service)
 

src/wf_mcp/broker/prompts.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from mcp.server.fastmcp import FastMCP
+from mcp.server.mcpserver import MCPServer
 
 from .service import WfMcpService
 
@@ -18,7 +18,7 @@ smallest reusable piece before saving a larger workflow artifact.
 """
 
 
-def register_broker_prompts(server: FastMCP, service: WfMcpService) -> None:
+def register_broker_prompts(server: MCPServer, service: WfMcpService) -> None:
     """Register broker prompt handlers on a FastMCP server."""
 
     @server.prompt(

src/wf_mcp/broker/resources.py

@@ -3,12 +3,12 @@ from __future__ import annotations
 import json
 from dataclasses import asdict
 
-from mcp.server.fastmcp import FastMCP
+from mcp.server.mcpserver import MCPServer
 
 from .service import WfMcpService
 
 
-def register_broker_resources(server: FastMCP, service: WfMcpService) -> None:
+def register_broker_resources(server: MCPServer, service: WfMcpService) -> None:
     """Register broker resource handlers on a FastMCP server."""
 
     @server.resource("wf-mcp://catalog", name="catalog.all")

src/wf_mcp/broker/server.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from mcp.server.fastmcp import FastMCP
+from mcp.server.mcpserver import MCPServer
 
 from wf_api import (
     WorkflowAdminApi,
@@ -28,8 +28,8 @@ from .service.workflow_operation_context import context_from_service
 from .tools import register_broker_tools
 
 
-def create_broker_server(service: WfMcpService) -> FastMCP:
-    server = FastMCP(
+def create_broker_server(service: WfMcpService) -> MCPServer:
+    server = MCPServer(
         "wf-mcp-broker",
         instructions=(
             "A broker MCP server over one or more upstream MCP connections. "

src/wf_mcp/broker/service/upstream_transport.py

@@ -7,9 +7,9 @@ from dataclasses import dataclass, field
 from typing import Any
 
 import anyio
-import httpx
+import httpx2
 from mcp.client.streamable_http import StreamableHTTPError
-from mcp.shared.exceptions import McpError
+from mcp.shared.exceptions import MCPError
 
 from wf_artifacts import (
     DependencyDiagnostic,
@@ -399,8 +399,8 @@ _LIVE_SOURCE_CHECK_FAILURES = (
     anyio.ClosedResourceError,
     anyio.EndOfStream,
     anyio.BrokenResourceError,
-    httpx.HTTPError,
-    McpError,
+    httpx2.HTTPError,
+    MCPError,
     StreamableHTTPError,
 )
 

src/wf_mcp/broker/tools.py

@@ -1,12 +1,12 @@
 from __future__ import annotations
 
-from mcp.server.fastmcp import FastMCP
+from mcp.server.mcpserver import MCPServer
 
 from ..admin_surface import register_service_admin_tools
 from .service import WfMcpService
 
 
-def register_broker_tools(server: FastMCP, service: WfMcpService) -> None:
+def register_broker_tools(server: MCPServer, service: WfMcpService) -> None:
     """Register legacy bare-name broker tools from the shared admin registrar."""
     register_service_admin_tools(
         server,

src/wf_mcp/notifications/mapping.py

@@ -15,7 +15,7 @@ def map_event_to_notifications(event: McpEvent) -> list[mcp_types.ServerNotifica
     notification = _list_changed_notification(event)
     if notification is None:
         return []
-    return [mcp_types.ServerNotification(notification)]
+    return [notification]
 
 
 def _list_changed_notification(

src/wf_mcp/notifications/sink.py

@@ -34,7 +34,7 @@ class FastMcpNotificationContext(Protocol):
 
     async def send_notification(
         self,
-        notification: mcp_types.ServerNotificationType,
+        notification: mcp_types.ServerNotification,
     ) -> None: ...
 
 
@@ -46,4 +46,4 @@ class FastMcpContextNotificationSink:
 
     async def send_event(self, event: McpEvent) -> None:
         for notification in map_event_to_notifications(event):
-            await self._context.send_notification(notification.root)
+            await self._context.send_notification(notification)

src/wf_mcp/proxy/mounts.py

@@ -9,12 +9,12 @@ from pathlib import Path
 from typing import Any, Generic, TypeVar
 
 import anyio
-import httpx
+import httpx2
 from fastmcp import FastMCP
 from fastmcp.client.transports.config import MCPConfigTransport
 from fastmcp.server.providers.proxy import FastMCPProxy, StatefulProxyClient
 from mcp.client.streamable_http import StreamableHTTPError
-from mcp.shared.exceptions import McpError
+from mcp.shared.exceptions import MCPError
 
 from ..models import BrokerConfig, ConnectionConfig
 from ..proxy_config import broker_config_to_fastmcp_config
@@ -33,8 +33,8 @@ _PROXY_LIST_FAILURES = (
     anyio.ClosedResourceError,
     anyio.EndOfStream,
     anyio.BrokenResourceError,
-    httpx.HTTPError,
-    McpError,
+    httpx2.HTTPError,
+    MCPError,
     StreamableHTTPError,
 )
 logger = logging.getLogger(__name__)