diff --git a/third_party/go/opencensus-proto/gen-go/agent/trace/v1/trace_service.pb.go b/third_party/go/opencensus-proto/gen-go/agent/trace/v1/trace_service.pb.go
new file mode 100644
index 0000000..a0a3504
--- /dev/null
+++ b/third_party/go/opencensus-proto/gen-go/agent/trace/v1/trace_service.pb.go
@@ -0,0 +1,457 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: opencensus/proto/agent/trace/v1/trace_service.proto
+
+package v1
+
+import (
+	context "context"
+	fmt "fmt"
+	v1 "github.com/census-instrumentation/opencensus-proto/gen-go/agent/common/v1"
+	v12 "github.com/census-instrumentation/opencensus-proto/gen-go/resource/v1"
+	v11 "github.com/census-instrumentation/opencensus-proto/gen-go/trace/v1"
+	proto "github.com/golang/protobuf/proto"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+	math "math"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+
+type CurrentLibraryConfig struct {
+	// This is required only in the first message on the stream or if the
+	// previous sent CurrentLibraryConfig message has a different Node (e.g.
+	// when the same RPC is used to configure multiple Applications).
+	Node *v1.Node `protobuf:"bytes,1,opt,name=node,proto3" json:"node,omitempty"`
+	// Current configuration.
+	Config               *v11.TraceConfig `protobuf:"bytes,2,opt,name=config,proto3" json:"config,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}         `json:"-"`
+	XXX_unrecognized     []byte           `json:"-"`
+	XXX_sizecache        int32            `json:"-"`
+}
+
+func (m *CurrentLibraryConfig) Reset()         { *m = CurrentLibraryConfig{} }
+func (m *CurrentLibraryConfig) String() string { return proto.CompactTextString(m) }
+func (*CurrentLibraryConfig) ProtoMessage()    {}
+func (*CurrentLibraryConfig) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7027f99caf7ac6a5, []int{0}
+}
+
+func (m *CurrentLibraryConfig) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_CurrentLibraryConfig.Unmarshal(m, b)
+}
+func (m *CurrentLibraryConfig) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_CurrentLibraryConfig.Marshal(b, m, deterministic)
+}
+func (m *CurrentLibraryConfig) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_CurrentLibraryConfig.Merge(m, src)
+}
+func (m *CurrentLibraryConfig) XXX_Size() int {
+	return xxx_messageInfo_CurrentLibraryConfig.Size(m)
+}
+func (m *CurrentLibraryConfig) XXX_DiscardUnknown() {
+	xxx_messageInfo_CurrentLibraryConfig.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_CurrentLibraryConfig proto.InternalMessageInfo
+
+func (m *CurrentLibraryConfig) GetNode() *v1.Node {
+	if m != nil {
+		return m.Node
+	}
+	return nil
+}
+
+func (m *CurrentLibraryConfig) GetConfig() *v11.TraceConfig {
+	if m != nil {
+		return m.Config
+	}
+	return nil
+}
+
+type UpdatedLibraryConfig struct {
+	// This field is ignored when the RPC is used to configure only one Application.
+	// This is required only in the first message on the stream or if the
+	// previous sent UpdatedLibraryConfig message has a different Node.
+	Node *v1.Node `protobuf:"bytes,1,opt,name=node,proto3" json:"node,omitempty"`
+	// Requested updated configuration.
+	Config               *v11.TraceConfig `protobuf:"bytes,2,opt,name=config,proto3" json:"config,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}         `json:"-"`
+	XXX_unrecognized     []byte           `json:"-"`
+	XXX_sizecache        int32            `json:"-"`
+}
+
+func (m *UpdatedLibraryConfig) Reset()         { *m = UpdatedLibraryConfig{} }
+func (m *UpdatedLibraryConfig) String() string { return proto.CompactTextString(m) }
+func (*UpdatedLibraryConfig) ProtoMessage()    {}
+func (*UpdatedLibraryConfig) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7027f99caf7ac6a5, []int{1}
+}
+
+func (m *UpdatedLibraryConfig) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_UpdatedLibraryConfig.Unmarshal(m, b)
+}
+func (m *UpdatedLibraryConfig) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_UpdatedLibraryConfig.Marshal(b, m, deterministic)
+}
+func (m *UpdatedLibraryConfig) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_UpdatedLibraryConfig.Merge(m, src)
+}
+func (m *UpdatedLibraryConfig) XXX_Size() int {
+	return xxx_messageInfo_UpdatedLibraryConfig.Size(m)
+}
+func (m *UpdatedLibraryConfig) XXX_DiscardUnknown() {
+	xxx_messageInfo_UpdatedLibraryConfig.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_UpdatedLibraryConfig proto.InternalMessageInfo
+
+func (m *UpdatedLibraryConfig) GetNode() *v1.Node {
+	if m != nil {
+		return m.Node
+	}
+	return nil
+}
+
+func (m *UpdatedLibraryConfig) GetConfig() *v11.TraceConfig {
+	if m != nil {
+		return m.Config
+	}
+	return nil
+}
+
+type ExportTraceServiceRequest struct {
+	// This is required only in the first message on the stream or if the
+	// previous sent ExportTraceServiceRequest message has a different Node (e.g.
+	// when the same RPC is used to send Spans from multiple Applications).
+	Node *v1.Node `protobuf:"bytes,1,opt,name=node,proto3" json:"node,omitempty"`
+	// A list of Spans that belong to the last received Node.
+	Spans []*v11.Span `protobuf:"bytes,2,rep,name=spans,proto3" json:"spans,omitempty"`
+	// The resource for the spans in this message that do not have an explicit
+	// resource set.
+	// If unset, the most recently set resource in the RPC stream applies. It is
+	// valid to never be set within a stream, e.g. when no resource info is known.
+	Resource             *v12.Resource `protobuf:"bytes,3,opt,name=resource,proto3" json:"resource,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}      `json:"-"`
+	XXX_unrecognized     []byte        `json:"-"`
+	XXX_sizecache        int32         `json:"-"`
+}
+
+func (m *ExportTraceServiceRequest) Reset()         { *m = ExportTraceServiceRequest{} }
+func (m *ExportTraceServiceRequest) String() string { return proto.CompactTextString(m) }
+func (*ExportTraceServiceRequest) ProtoMessage()    {}
+func (*ExportTraceServiceRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7027f99caf7ac6a5, []int{2}
+}
+
+func (m *ExportTraceServiceRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ExportTraceServiceRequest.Unmarshal(m, b)
+}
+func (m *ExportTraceServiceRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ExportTraceServiceRequest.Marshal(b, m, deterministic)
+}
+func (m *ExportTraceServiceRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ExportTraceServiceRequest.Merge(m, src)
+}
+func (m *ExportTraceServiceRequest) XXX_Size() int {
+	return xxx_messageInfo_ExportTraceServiceRequest.Size(m)
+}
+func (m *ExportTraceServiceRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_ExportTraceServiceRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ExportTraceServiceRequest proto.InternalMessageInfo
+
+func (m *ExportTraceServiceRequest) GetNode() *v1.Node {
+	if m != nil {
+		return m.Node
+	}
+	return nil
+}
+
+func (m *ExportTraceServiceRequest) GetSpans() []*v11.Span {
+	if m != nil {
+		return m.Spans
+	}
+	return nil
+}
+
+func (m *ExportTraceServiceRequest) GetResource() *v12.Resource {
+	if m != nil {
+		return m.Resource
+	}
+	return nil
+}
+
+type ExportTraceServiceResponse struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ExportTraceServiceResponse) Reset()         { *m = ExportTraceServiceResponse{} }
+func (m *ExportTraceServiceResponse) String() string { return proto.CompactTextString(m) }
+func (*ExportTraceServiceResponse) ProtoMessage()    {}
+func (*ExportTraceServiceResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7027f99caf7ac6a5, []int{3}
+}
+
+func (m *ExportTraceServiceResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ExportTraceServiceResponse.Unmarshal(m, b)
+}
+func (m *ExportTraceServiceResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ExportTraceServiceResponse.Marshal(b, m, deterministic)
+}
+func (m *ExportTraceServiceResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ExportTraceServiceResponse.Merge(m, src)
+}
+func (m *ExportTraceServiceResponse) XXX_Size() int {
+	return xxx_messageInfo_ExportTraceServiceResponse.Size(m)
+}
+func (m *ExportTraceServiceResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_ExportTraceServiceResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ExportTraceServiceResponse proto.InternalMessageInfo
+
+func init() {
+	proto.RegisterType((*CurrentLibraryConfig)(nil), "opencensus.proto.agent.trace.v1.CurrentLibraryConfig")
+	proto.RegisterType((*UpdatedLibraryConfig)(nil), "opencensus.proto.agent.trace.v1.UpdatedLibraryConfig")
+	proto.RegisterType((*ExportTraceServiceRequest)(nil), "opencensus.proto.agent.trace.v1.ExportTraceServiceRequest")
+	proto.RegisterType((*ExportTraceServiceResponse)(nil), "opencensus.proto.agent.trace.v1.ExportTraceServiceResponse")
+}
+
+func init() {
+	proto.RegisterFile("opencensus/proto/agent/trace/v1/trace_service.proto", fileDescriptor_7027f99caf7ac6a5)
+}
+
+var fileDescriptor_7027f99caf7ac6a5 = []byte{
+	// 442 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xcc, 0x94, 0xcf, 0xaa, 0xd4, 0x30,
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+	0xff, 0xff, 0x65, 0x76, 0xd7, 0xb9, 0xed, 0x04, 0x00, 0x00,
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// TraceServiceClient is the client API for TraceService service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type TraceServiceClient interface {
+	// After initialization, this RPC must be kept alive for the entire life of
+	// the application. The agent pushes configs down to applications via a
+	// stream.
+	Config(ctx context.Context, opts ...grpc.CallOption) (TraceService_ConfigClient, error)
+	// For performance reasons, it is recommended to keep this RPC
+	// alive for the entire life of the application.
+	Export(ctx context.Context, opts ...grpc.CallOption) (TraceService_ExportClient, error)
+}
+
+type traceServiceClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewTraceServiceClient(cc *grpc.ClientConn) TraceServiceClient {
+	return &traceServiceClient{cc}
+}
+
+func (c *traceServiceClient) Config(ctx context.Context, opts ...grpc.CallOption) (TraceService_ConfigClient, error) {
+	stream, err := c.cc.NewStream(ctx, &_TraceService_serviceDesc.Streams[0], "/opencensus.proto.agent.trace.v1.TraceService/Config", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &traceServiceConfigClient{stream}
+	return x, nil
+}
+
+type TraceService_ConfigClient interface {
+	Send(*CurrentLibraryConfig) error
+	Recv() (*UpdatedLibraryConfig, error)
+	grpc.ClientStream
+}
+
+type traceServiceConfigClient struct {
+	grpc.ClientStream
+}
+
+func (x *traceServiceConfigClient) Send(m *CurrentLibraryConfig) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *traceServiceConfigClient) Recv() (*UpdatedLibraryConfig, error) {
+	m := new(UpdatedLibraryConfig)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *traceServiceClient) Export(ctx context.Context, opts ...grpc.CallOption) (TraceService_ExportClient, error) {
+	stream, err := c.cc.NewStream(ctx, &_TraceService_serviceDesc.Streams[1], "/opencensus.proto.agent.trace.v1.TraceService/Export", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &traceServiceExportClient{stream}
+	return x, nil
+}
+
+type TraceService_ExportClient interface {
+	Send(*ExportTraceServiceRequest) error
+	Recv() (*ExportTraceServiceResponse, error)
+	grpc.ClientStream
+}
+
+type traceServiceExportClient struct {
+	grpc.ClientStream
+}
+
+func (x *traceServiceExportClient) Send(m *ExportTraceServiceRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *traceServiceExportClient) Recv() (*ExportTraceServiceResponse, error) {
+	m := new(ExportTraceServiceResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// TraceServiceServer is the server API for TraceService service.
+type TraceServiceServer interface {
+	// After initialization, this RPC must be kept alive for the entire life of
+	// the application. The agent pushes configs down to applications via a
+	// stream.
+	Config(TraceService_ConfigServer) error
+	// For performance reasons, it is recommended to keep this RPC
+	// alive for the entire life of the application.
+	Export(TraceService_ExportServer) error
+}
+
+// UnimplementedTraceServiceServer can be embedded to have forward compatible implementations.
+type UnimplementedTraceServiceServer struct {
+}
+
+func (*UnimplementedTraceServiceServer) Config(srv TraceService_ConfigServer) error {
+	return status.Errorf(codes.Unimplemented, "method Config not implemented")
+}
+func (*UnimplementedTraceServiceServer) Export(srv TraceService_ExportServer) error {
+	return status.Errorf(codes.Unimplemented, "method Export not implemented")
+}
+
+func RegisterTraceServiceServer(s *grpc.Server, srv TraceServiceServer) {
+	s.RegisterService(&_TraceService_serviceDesc, srv)
+}
+
+func _TraceService_Config_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(TraceServiceServer).Config(&traceServiceConfigServer{stream})
+}
+
+type TraceService_ConfigServer interface {
+	Send(*UpdatedLibraryConfig) error
+	Recv() (*CurrentLibraryConfig, error)
+	grpc.ServerStream
+}
+
+type traceServiceConfigServer struct {
+	grpc.ServerStream
+}
+
+func (x *traceServiceConfigServer) Send(m *UpdatedLibraryConfig) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *traceServiceConfigServer) Recv() (*CurrentLibraryConfig, error) {
+	m := new(CurrentLibraryConfig)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func _TraceService_Export_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(TraceServiceServer).Export(&traceServiceExportServer{stream})
+}
+
+type TraceService_ExportServer interface {
+	Send(*ExportTraceServiceResponse) error
+	Recv() (*ExportTraceServiceRequest, error)
+	grpc.ServerStream
+}
+
+type traceServiceExportServer struct {
+	grpc.ServerStream
+}
+
+func (x *traceServiceExportServer) Send(m *ExportTraceServiceResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *traceServiceExportServer) Recv() (*ExportTraceServiceRequest, error) {
+	m := new(ExportTraceServiceRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+var _TraceService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "opencensus.proto.agent.trace.v1.TraceService",
+	HandlerType: (*TraceServiceServer)(nil),
+	Methods:     []grpc.MethodDesc{},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "Config",
+			Handler:       _TraceService_Config_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+		{
+			StreamName:    "Export",
+			Handler:       _TraceService_Export_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "opencensus/proto/agent/trace/v1/trace_service.proto",
+}