Open the standalone server->client SSE stream (GET /mcp) in a background
task, so the server can deliver sampling / elicitation / roots requests
and notifications outside of any POST response. A server that does not
offer this stream (e.g. responds 405) is tolerated as a no-op.
Open the standalone server->client SSE stream (GET /mcp) in a background task, so the server can deliver sampling / elicitation / roots requests and notifications outside of any POST response. A server that does not offer this stream (e.g. responds 405) is tolerated as a no-op.