diff --git a/ui/metrics/metrics_proto/metrics.pb.go b/ui/metrics/metrics_proto/metrics.pb.go
index 69f5689..9f9b863 100644
--- a/ui/metrics/metrics_proto/metrics.pb.go
+++ b/ui/metrics/metrics_proto/metrics.pb.go
@@ -14,7 +14,7 @@
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.27.1
+// 	protoc-gen-go v1.28.0
 // 	protoc        v3.9.1
 // source: metrics.proto
 
@@ -954,9 +954,9 @@
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// The build system, eg. Soong or Make.
+	// The build system, e.g. Soong or Make.
 	BuildSystem *ModuleTypeInfo_BuildSystem `protobuf:"varint,1,opt,name=build_system,json=buildSystem,enum=soong_build_metrics.ModuleTypeInfo_BuildSystem,def=0" json:"build_system,omitempty"`
-	// The module type, eg. java_library, cc_binary, and etc.
+	// The module type, e.g. java_library, cc_binary, and etc.
 	ModuleType *string `protobuf:"bytes,2,opt,name=module_type,json=moduleType" json:"module_type,omitempty"`
 	// The number of logical modules.
 	NumOfModules *uint32 `protobuf:"varint,3,opt,name=num_of_modules,json=numOfModules" json:"num_of_modules,omitempty"`
@@ -1142,6 +1142,8 @@
 	MaxHeapSize *uint64 `protobuf:"varint,5,opt,name=max_heap_size,json=maxHeapSize" json:"max_heap_size,omitempty"`
 	// Runtime metrics for soong_build execution.
 	Events []*PerfInfo `protobuf:"bytes,6,rep,name=events" json:"events,omitempty"`
+	// Mixed Builds information
+	MixedBuildsInfo *MixedBuildsInfo `protobuf:"bytes,7,opt,name=mixed_builds_info,json=mixedBuildsInfo" json:"mixed_builds_info,omitempty"`
 }
 
 func (x *SoongBuildMetrics) Reset() {
@@ -1218,6 +1220,13 @@
 	return nil
 }
 
+func (x *SoongBuildMetrics) GetMixedBuildsInfo() *MixedBuildsInfo {
+	if x != nil {
+		return x.MixedBuildsInfo
+	}
+	return nil
+}
+
 type ExpConfigFetcher struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1287,6 +1296,63 @@
 	return 0
 }
 
+type MixedBuildsInfo struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Modules that are enabled for Mixed Builds.
+	MixedBuildEnabledModules []string `protobuf:"bytes,1,rep,name=mixed_build_enabled_modules,json=mixedBuildEnabledModules" json:"mixed_build_enabled_modules,omitempty"`
+	// Modules that are not currently eligible for MixedBuilds
+	MixedBuildDisabledModules []string `protobuf:"bytes,2,rep,name=mixed_build_disabled_modules,json=mixedBuildDisabledModules" json:"mixed_build_disabled_modules,omitempty"`
+}
+
+func (x *MixedBuildsInfo) Reset() {
+	*x = MixedBuildsInfo{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_metrics_proto_msgTypes[10]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *MixedBuildsInfo) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*MixedBuildsInfo) ProtoMessage() {}
+
+func (x *MixedBuildsInfo) ProtoReflect() protoreflect.Message {
+	mi := &file_metrics_proto_msgTypes[10]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use MixedBuildsInfo.ProtoReflect.Descriptor instead.
+func (*MixedBuildsInfo) Descriptor() ([]byte, []int) {
+	return file_metrics_proto_rawDescGZIP(), []int{10}
+}
+
+func (x *MixedBuildsInfo) GetMixedBuildEnabledModules() []string {
+	if x != nil {
+		return x.MixedBuildEnabledModules
+	}
+	return nil
+}
+
+func (x *MixedBuildsInfo) GetMixedBuildDisabledModules() []string {
+	if x != nil {
+		return x.MixedBuildDisabledModules
+	}
+	return nil
+}
+
 var File_metrics_proto protoreflect.FileDescriptor
 
 var file_metrics_proto_rawDesc = []byte{
@@ -1491,7 +1557,7 @@
 	0x2e, 0x73, 0x6f, 0x6f, 0x6e, 0x67, 0x5f, 0x62, 0x75, 0x69, 0x6c, 0x64, 0x5f, 0x6d, 0x65, 0x74,
 	0x72, 0x69, 0x63, 0x73, 0x2e, 0x43, 0x72, 0x69, 0x74, 0x69, 0x63, 0x61, 0x6c, 0x55, 0x73, 0x65,
 	0x72, 0x4a, 0x6f, 0x75, 0x72, 0x6e, 0x65, 0x79, 0x4d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x52,
-	0x04, 0x63, 0x75, 0x6a, 0x73, 0x22, 0xfa, 0x01, 0x0a, 0x11, 0x53, 0x6f, 0x6f, 0x6e, 0x67, 0x42,
+	0x04, 0x63, 0x75, 0x6a, 0x73, 0x22, 0xcc, 0x02, 0x0a, 0x11, 0x53, 0x6f, 0x6f, 0x6e, 0x67, 0x42,
 	0x75, 0x69, 0x6c, 0x64, 0x4d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x12, 0x18, 0x0a, 0x07, 0x6d,
 	0x6f, 0x64, 0x75, 0x6c, 0x65, 0x73, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0d, 0x52, 0x07, 0x6d, 0x6f,
 	0x64, 0x75, 0x6c, 0x65, 0x73, 0x12, 0x1a, 0x0a, 0x08, 0x76, 0x61, 0x72, 0x69, 0x61, 0x6e, 0x74,
@@ -1507,22 +1573,36 @@
 	0x76, 0x65, 0x6e, 0x74, 0x73, 0x18, 0x06, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x1d, 0x2e, 0x73, 0x6f,
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 	0x73, 0x2e, 0x50, 0x65, 0x72, 0x66, 0x49, 0x6e, 0x66, 0x6f, 0x52, 0x06, 0x65, 0x76, 0x65, 0x6e,
-	0x74, 0x73, 0x22, 0xc8, 0x01, 0x0a, 0x10, 0x45, 0x78, 0x70, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67,
-	0x46, 0x65, 0x74, 0x63, 0x68, 0x65, 0x72, 0x12, 0x4a, 0x0a, 0x06, 0x73, 0x74, 0x61, 0x74, 0x75,
-	0x73, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0e, 0x32, 0x32, 0x2e, 0x73, 0x6f, 0x6f, 0x6e, 0x67, 0x5f,
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+	0x91, 0x01, 0x0a, 0x0f, 0x4d, 0x69, 0x78, 0x65, 0x64, 0x42, 0x75, 0x69, 0x6c, 0x64, 0x73, 0x49,
+	0x6e, 0x66, 0x6f, 0x12, 0x3d, 0x0a, 0x1b, 0x6d, 0x69, 0x78, 0x65, 0x64, 0x5f, 0x62, 0x75, 0x69,
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+	0x65, 0x73, 0x18, 0x01, 0x20, 0x03, 0x28, 0x09, 0x52, 0x18, 0x6d, 0x69, 0x78, 0x65, 0x64, 0x42,
+	0x75, 0x69, 0x6c, 0x64, 0x45, 0x6e, 0x61, 0x62, 0x6c, 0x65, 0x64, 0x4d, 0x6f, 0x64, 0x75, 0x6c,
+	0x65, 0x73, 0x12, 0x3f, 0x0a, 0x1c, 0x6d, 0x69, 0x78, 0x65, 0x64, 0x5f, 0x62, 0x75, 0x69, 0x6c,
+	0x64, 0x5f, 0x64, 0x69, 0x73, 0x61, 0x62, 0x6c, 0x65, 0x64, 0x5f, 0x6d, 0x6f, 0x64, 0x75, 0x6c,
+	0x65, 0x73, 0x18, 0x02, 0x20, 0x03, 0x28, 0x09, 0x52, 0x19, 0x6d, 0x69, 0x78, 0x65, 0x64, 0x42,
+	0x75, 0x69, 0x6c, 0x64, 0x44, 0x69, 0x73, 0x61, 0x62, 0x6c, 0x65, 0x64, 0x4d, 0x6f, 0x64, 0x75,
+	0x6c, 0x65, 0x73, 0x42, 0x28, 0x5a, 0x26, 0x61, 0x6e, 0x64, 0x72, 0x6f, 0x69, 0x64, 0x2f, 0x73,
+	0x6f, 0x6f, 0x6e, 0x67, 0x2f, 0x75, 0x69, 0x2f, 0x6d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x2f,
+	0x6d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x5f, 0x70, 0x72, 0x6f, 0x74, 0x6f,
 }
 
 var (
@@ -1538,7 +1618,7 @@
 }
 
 var file_metrics_proto_enumTypes = make([]protoimpl.EnumInfo, 4)
-var file_metrics_proto_msgTypes = make([]protoimpl.MessageInfo, 10)
+var file_metrics_proto_msgTypes = make([]protoimpl.MessageInfo, 11)
 var file_metrics_proto_goTypes = []interface{}{
 	(MetricsBase_BuildVariant)(0),       // 0: soong_build_metrics.MetricsBase.BuildVariant
 	(MetricsBase_Arch)(0),               // 1: soong_build_metrics.MetricsBase.Arch
@@ -1554,6 +1634,7 @@
 	(*CriticalUserJourneysMetrics)(nil), // 11: soong_build_metrics.CriticalUserJourneysMetrics
 	(*SoongBuildMetrics)(nil),           // 12: soong_build_metrics.SoongBuildMetrics
 	(*ExpConfigFetcher)(nil),            // 13: soong_build_metrics.ExpConfigFetcher
+	(*MixedBuildsInfo)(nil),             // 14: soong_build_metrics.MixedBuildsInfo
 }
 var file_metrics_proto_depIdxs = []int32{
 	0,  // 0: soong_build_metrics.MetricsBase.target_build_variant:type_name -> soong_build_metrics.MetricsBase.BuildVariant
@@ -1575,12 +1656,13 @@
 	4,  // 16: soong_build_metrics.CriticalUserJourneyMetrics.metrics:type_name -> soong_build_metrics.MetricsBase
 	10, // 17: soong_build_metrics.CriticalUserJourneysMetrics.cujs:type_name -> soong_build_metrics.CriticalUserJourneyMetrics
 	7,  // 18: soong_build_metrics.SoongBuildMetrics.events:type_name -> soong_build_metrics.PerfInfo
-	3,  // 19: soong_build_metrics.ExpConfigFetcher.status:type_name -> soong_build_metrics.ExpConfigFetcher.ConfigStatus
-	20, // [20:20] is the sub-list for method output_type
-	20, // [20:20] is the sub-list for method input_type
-	20, // [20:20] is the sub-list for extension type_name
-	20, // [20:20] is the sub-list for extension extendee
-	0,  // [0:20] is the sub-list for field type_name
+	14, // 19: soong_build_metrics.SoongBuildMetrics.mixed_builds_info:type_name -> soong_build_metrics.MixedBuildsInfo
+	3,  // 20: soong_build_metrics.ExpConfigFetcher.status:type_name -> soong_build_metrics.ExpConfigFetcher.ConfigStatus
+	21, // [21:21] is the sub-list for method output_type
+	21, // [21:21] is the sub-list for method input_type
+	21, // [21:21] is the sub-list for extension type_name
+	21, // [21:21] is the sub-list for extension extendee
+	0,  // [0:21] is the sub-list for field type_name
 }
 
 func init() { file_metrics_proto_init() }
@@ -1709,6 +1791,18 @@
 				return nil
 			}
 		}
+		file_metrics_proto_msgTypes[10].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*MixedBuildsInfo); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
@@ -1716,7 +1810,7 @@
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_metrics_proto_rawDesc,
 			NumEnums:      4,
-			NumMessages:   10,
+			NumMessages:   11,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/ui/metrics/metrics_proto/metrics.proto b/ui/metrics/metrics_proto/metrics.proto
index 814eb67..51dd523 100644
--- a/ui/metrics/metrics_proto/metrics.proto
+++ b/ui/metrics/metrics_proto/metrics.proto
@@ -200,10 +200,10 @@
     SOONG = 1;
     MAKE = 2;
   }
-  // The build system, eg. Soong or Make.
+  // The build system, e.g. Soong or Make.
   optional BuildSystem build_system = 1 [default = UNKNOWN];
 
-  // The module type, eg. java_library, cc_binary, and etc.
+  // The module type, e.g. java_library, cc_binary, and etc.
   optional string module_type = 2;
 
   // The number of logical modules.
@@ -241,6 +241,9 @@
 
   // Runtime metrics for soong_build execution.
   repeated PerfInfo events = 6;
+
+  // Mixed Builds information
+  optional MixedBuildsInfo mixed_builds_info = 7;
 }
 
 message ExpConfigFetcher {
@@ -261,3 +264,25 @@
   // Time, in microseconds, taken by the expconfigfetcher
   optional uint64 micros = 3;
 }
+
+message MixedBuildsInfo{
+  // Modules may be listed below as both enabled for Mixed Builds
+  // and disabled for Mixed Builds. This implies that some variants
+  // of the module are handled by Bazel in a Mixed Build, and other
+  // variants of the same module are handled by Soong.
+
+  // Modules that are enabled for Mixed Builds.
+  repeated string mixed_build_enabled_modules = 1;
+
+  // Modules that are not currently eligible to be handled
+  // by Bazel in a Mixed Build.
+  // Note that not all modules exempt from Bazel handling are
+  // listed. This list includes only modules which are of a
+  // Mixed-Build supported module type but are nevertheless not
+  // handled by Bazel. This may occur due to being present in
+  // the mixed build denylist, or as part of an unsupported
+  // mixed build variant type such as Windows.
+
+  // Modules that are not enabled for MixedBuilds
+  repeated string mixed_build_disabled_modules = 2;
+}