diff --git a/bazel/cc_grpc_library.bzl b/bazel/cc_grpc_library.bzl
--- a/bazel/cc_grpc_library.bzl
+++ b/bazel/cc_grpc_library.bzl
@@ -28,6 +28,7 @@ def cc_grpc_library(
         allow_deprecated = False,
         use_external = False,  # @unused
         grpc_only = False,
+        plugin_flags = [],
         **kwargs):
     """Generates C++ grpc classes for services defined in a proto file.
 
@@ -109,6 +110,7 @@ def cc_grpc_library(
             well_known_protos = well_known_protos,
             generate_mocks = generate_mocks,
             allow_deprecated = allow_deprecated,
+            flags = plugin_flags,
             **kwargs
         )
 
diff --git a/src/core/lib/promise/party.h b/src/core/lib/promise/party.h
--- a/src/core/lib/promise/party.h
+++ b/src/core/lib/promise/party.h
@@ -21,6 +21,7 @@
 #include <stdint.h>
 
 #include <atomic>
+#include <cinttypes>
 #include <limits>
 #include <string>
 #include <utility>
@@ -685,7 +686,7 @@ class Party : public Activity, private Wakeable {
       DebugLocation loc = {}) {
     GRPC_TRACE_LOG(party_state, INFO).AtLocation(loc.file(), loc.line())
         << this << " " << op << " "
-        << absl::StrFormat("%016" PRIx64 " -> %016" PRIx64, prev_state,
+        << absl::StrFormat("%016lx -> %016lx", prev_state,
                            new_state);
   }
 
diff --git a/src/python/grpcio/grpc/BUILD.bazel b/src/python/grpcio/grpc/BUILD.bazel
--- a/src/python/grpcio/grpc/BUILD.bazel
+++ b/src/python/grpcio/grpc/BUILD.bazel
@@ -104,9 +104,9 @@ py_library(
 py_library(
     name = "grpcio",
     srcs = ["__init__.py"],
-    data = [
-        "//:grpc",
-    ],
+#    data = [
+#        "//:grpc",
+#    ],
     imports = ["../"],
     deps = [
         ":_observability",

diff --git a/MODULE.bazel b/MODULE.bazel
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -60,7 +60,7 @@ bazel_dep(name = "rules_shell", version = "0.4.0", dev_dependency = True)
 # Python dependencies
 # ===================
 
-bazel_dep(name = "rules_python", version = "1.5.4")
+bazel_dep(name = "rules_python", version = "1.6.3")
 
 PYTHON_VERSIONS = [
     "3.9",
@@ -68,7 +68,7 @@ PYTHON_VERSIONS = [
     "3.11",
     "3.12",
     "3.13",
-    "3.14.0b2",
+    "3.14",
 ]
 
 python = use_extension("@rules_python//python/extensions:python.bzl", "python")

diff --git a/bazel/cython_library.bzl b/bazel/cython_library.bzl
--- a/bazel/cython_library.bzl
+++ b/bazel/cython_library.bzl
@@ -69,5 +69,6 @@ def pyx_library(name, deps = [], py_deps

     shared_objects = []
     defines = kwargs.pop("defines", [])
+    copts = kwargs.pop("copts", [])
     for src in pyx_srcs:
         stem = src.split(".")[0]
@@ -81,9 +81,16 @@ def pyx_library(name, deps = [], py_deps
             defines = defines,
+            copts = copts,
+            features = kwargs.get("features", []),
             linkshared = 1,
-            linkopts = select({
-                # The "-undefined dynamic_lookup" flag allows the shared library to use symbols
-                # that are not defined at link time but will be resolved at runtime.
-                # This is necessary for Python extensions on macOS to access Python C API symbols.
-                "@platforms//os:macos": ["-undefined", "dynamic_lookup"],
-                "//conditions:default": [],
-            }),
+            linkopts = select({
+                # The "-undefined dynamic_lookup" flag allows the shared library to use symbols
+                # that are not defined at link time but will be resolved at runtime.
+                # This is necessary for Python extensions on macOS to access Python C API symbols.
+                "@platforms//os:macos": ["-undefined", "dynamic_lookup"],
+                "@platforms//os:windows": [
+                    "/NODEFAULTLIB:python3.lib",
+                    "/OPT:REF",
+                    "/OPT:ICF",
+                ],
+                "//conditions:default": [],
+            }),
        )
        shared_objects.append(shared_object_name)
diff --git a/src/python/grpcio/grpc/_cython/BUILD.bazel b/src/python/grpcio/grpc/_cython/BUILD.bazel
--- a/src/python/grpcio/grpc/_cython/BUILD.bazel
+++ b/src/python/grpcio/grpc/_cython/BUILD.bazel
@@ -35,1 +35,10 @@
     defines = ["GRPC_PYTHON_BUILD=1"],
+    # -Wno-unused-result is needed because Cython generated code triggers unused result warnings.
+    copts = select({
+        "@platforms//os:windows": [],
+        "//conditions:default": ["-Wno-unused-result"],
+    }),
+    features = select({
+        "@platforms//os:windows": ["-layering_check", "force_no_whole_archive"],
+        "//conditions:default": ["-layering_check"],
+    }),