Server-side 2026-07-28 stateless support: classifier, driver split, server/discover (#2928)

tests/server/test_server_context.py

@@ -31,21 +31,20 @@ class _Lifespan:
 @pytest.mark.anyio
 async def test_context_exposes_lifespan_and_connection_and_forwards_base_context():
     captured: list[Context[_Lifespan]] = []
-    conn = Connection.__new__(Connection)  # placeholder until running_pair gives us the dispatcher
+    conn_holder: list[Connection] = []
 
     async def server_on_request(dctx: DCtx, method: str, params: Mapping[str, Any] | None) -> dict[str, Any]:
-        ctx: Context[_Lifespan] = Context(dctx, lifespan=_Lifespan("app"), connection=conn)
+        ctx: Context[_Lifespan] = Context(dctx, lifespan=_Lifespan("app"), connection=conn_holder[0])
         captured.append(ctx)
         return {}
 
     async with running_pair(direct_pair, server_on_request=server_on_request) as (client, server, *_):
-        # Now we have the server dispatcher; build the real Connection bound to it.
-        conn.__init__(server, has_standalone_channel=True, session_id="sess-1")
+        conn_holder.append(Connection.for_loop(server, session_id="sess-1"))
         with anyio.fail_after(5):
             await client.send_raw_request("t", None)
         ctx = captured[0]
         assert ctx.lifespan.name == "app"
-        assert ctx.connection is conn
+        assert ctx.connection is conn_holder[0]
         assert ctx.transport.kind == "direct"
         assert ctx.can_send_request is True
         assert ctx.session_id == "sess-1"
@@ -58,9 +57,7 @@ async def test_context_log_sends_request_scoped_message_notification():
     _, c_notify = echo_handlers(crec)
 
     async def server_on_request(dctx: DCtx, method: str, params: Mapping[str, Any] | None) -> dict[str, Any]:
-        ctx: Context[_Lifespan] = Context(
-            dctx, lifespan=_Lifespan("app"), connection=Connection(dctx, has_standalone_channel=True)
-        )
+        ctx: Context[_Lifespan] = Context(dctx, lifespan=_Lifespan("app"), connection=Connection.for_loop(dctx))
         await ctx.log("debug", "hello")  # pyright: ignore[reportDeprecated]
         return {}
 
@@ -82,9 +79,7 @@ async def test_context_log_includes_logger_and_meta_when_supplied():
     _, c_notify = echo_handlers(crec)
 
     async def server_on_request(dctx: DCtx, method: str, params: Mapping[str, Any] | None) -> dict[str, Any]:
-        ctx: Context[_Lifespan] = Context(
-            dctx, lifespan=_Lifespan("app"), connection=Connection(dctx, has_standalone_channel=True)
-        )
+        ctx: Context[_Lifespan] = Context(dctx, lifespan=_Lifespan("app"), connection=Connection.for_loop(dctx))
         await ctx.log("info", "x", logger="my.log", meta={"traceId": "t"})  # pyright: ignore[reportDeprecated]
         return {}