diff --git a/ui/metrics/metrics.go b/ui/metrics/metrics.go
index bc86f0a..64bbbf3 100644
--- a/ui/metrics/metrics.go
+++ b/ui/metrics/metrics.go
@@ -19,9 +19,9 @@
 	"os"
 	"strconv"
 
-	"android/soong/ui/metrics/metrics_proto"
-
 	"github.com/golang/protobuf/proto"
+
+	soong_metrics_proto "android/soong/ui/metrics/metrics_proto"
 )
 
 const (
@@ -137,13 +137,32 @@
 	}
 }
 
-func (m *Metrics) Serialize() (data []byte, err error) {
-	return proto.Marshal(&m.metrics)
-}
-
 // exports the output to the file at outputPath
 func (m *Metrics) Dump(outputPath string) (err error) {
-	data, err := m.Serialize()
+	return writeMessageToFile(&m.metrics, outputPath)
+}
+
+type CriticalUserJourneysMetrics struct {
+	cujs soong_metrics_proto.CriticalUserJourneysMetrics
+}
+
+func NewCriticalUserJourneysMetrics() *CriticalUserJourneysMetrics {
+	return &CriticalUserJourneysMetrics{}
+}
+
+func (c *CriticalUserJourneysMetrics) Add(name string, metrics *Metrics) {
+	c.cujs.Cujs = append(c.cujs.Cujs, &soong_metrics_proto.CriticalUserJourneyMetrics{
+		Name:    proto.String(name),
+		Metrics: &metrics.metrics,
+	})
+}
+
+func (c *CriticalUserJourneysMetrics) Dump(outputPath string) (err error) {
+	return writeMessageToFile(&c.cujs, outputPath)
+}
+
+func writeMessageToFile(pb proto.Message, outputPath string) (err error) {
+	data, err := proto.Marshal(pb)
 	if err != nil {
 		return err
 	}
diff --git a/ui/metrics/metrics_proto/metrics.pb.go b/ui/metrics/metrics_proto/metrics.pb.go
index 5486ec1..0fe5a0d 100644
--- a/ui/metrics/metrics_proto/metrics.pb.go
+++ b/ui/metrics/metrics_proto/metrics.pb.go
@@ -509,6 +509,95 @@
 	return 0
 }
 
+type CriticalUserJourneyMetrics struct {
+	// The name of a critical user journey test.
+	Name *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	// The metrics produced when running the critical user journey test.
+	Metrics              *MetricsBase `protobuf:"bytes,2,opt,name=metrics" json:"metrics,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}     `json:"-"`
+	XXX_unrecognized     []byte       `json:"-"`
+	XXX_sizecache        int32        `json:"-"`
+}
+
+func (m *CriticalUserJourneyMetrics) Reset()         { *m = CriticalUserJourneyMetrics{} }
+func (m *CriticalUserJourneyMetrics) String() string { return proto.CompactTextString(m) }
+func (*CriticalUserJourneyMetrics) ProtoMessage()    {}
+func (*CriticalUserJourneyMetrics) Descriptor() ([]byte, []int) {
+	return fileDescriptor_6039342a2ba47b72, []int{3}
+}
+
+func (m *CriticalUserJourneyMetrics) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_CriticalUserJourneyMetrics.Unmarshal(m, b)
+}
+func (m *CriticalUserJourneyMetrics) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_CriticalUserJourneyMetrics.Marshal(b, m, deterministic)
+}
+func (m *CriticalUserJourneyMetrics) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_CriticalUserJourneyMetrics.Merge(m, src)
+}
+func (m *CriticalUserJourneyMetrics) XXX_Size() int {
+	return xxx_messageInfo_CriticalUserJourneyMetrics.Size(m)
+}
+func (m *CriticalUserJourneyMetrics) XXX_DiscardUnknown() {
+	xxx_messageInfo_CriticalUserJourneyMetrics.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_CriticalUserJourneyMetrics proto.InternalMessageInfo
+
+func (m *CriticalUserJourneyMetrics) GetName() string {
+	if m != nil && m.Name != nil {
+		return *m.Name
+	}
+	return ""
+}
+
+func (m *CriticalUserJourneyMetrics) GetMetrics() *MetricsBase {
+	if m != nil {
+		return m.Metrics
+	}
+	return nil
+}
+
+type CriticalUserJourneysMetrics struct {
+	// A set of metrics from a run of the critical user journey tests.
+	Cujs                 []*CriticalUserJourneyMetrics `protobuf:"bytes,1,rep,name=cujs" json:"cujs,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                      `json:"-"`
+	XXX_unrecognized     []byte                        `json:"-"`
+	XXX_sizecache        int32                         `json:"-"`
+}
+
+func (m *CriticalUserJourneysMetrics) Reset()         { *m = CriticalUserJourneysMetrics{} }
+func (m *CriticalUserJourneysMetrics) String() string { return proto.CompactTextString(m) }
+func (*CriticalUserJourneysMetrics) ProtoMessage()    {}
+func (*CriticalUserJourneysMetrics) Descriptor() ([]byte, []int) {
+	return fileDescriptor_6039342a2ba47b72, []int{4}
+}
+
+func (m *CriticalUserJourneysMetrics) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_CriticalUserJourneysMetrics.Unmarshal(m, b)
+}
+func (m *CriticalUserJourneysMetrics) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_CriticalUserJourneysMetrics.Marshal(b, m, deterministic)
+}
+func (m *CriticalUserJourneysMetrics) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_CriticalUserJourneysMetrics.Merge(m, src)
+}
+func (m *CriticalUserJourneysMetrics) XXX_Size() int {
+	return xxx_messageInfo_CriticalUserJourneysMetrics.Size(m)
+}
+func (m *CriticalUserJourneysMetrics) XXX_DiscardUnknown() {
+	xxx_messageInfo_CriticalUserJourneysMetrics.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_CriticalUserJourneysMetrics proto.InternalMessageInfo
+
+func (m *CriticalUserJourneysMetrics) GetCujs() []*CriticalUserJourneyMetrics {
+	if m != nil {
+		return m.Cujs
+	}
+	return nil
+}
+
 func init() {
 	proto.RegisterEnum("soong_build_metrics.MetricsBase_BuildVariant", MetricsBase_BuildVariant_name, MetricsBase_BuildVariant_value)
 	proto.RegisterEnum("soong_build_metrics.MetricsBase_Arch", MetricsBase_Arch_name, MetricsBase_Arch_value)
@@ -516,59 +605,65 @@
 	proto.RegisterType((*MetricsBase)(nil), "soong_build_metrics.MetricsBase")
 	proto.RegisterType((*PerfInfo)(nil), "soong_build_metrics.PerfInfo")
 	proto.RegisterType((*ModuleTypeInfo)(nil), "soong_build_metrics.ModuleTypeInfo")
+	proto.RegisterType((*CriticalUserJourneyMetrics)(nil), "soong_build_metrics.CriticalUserJourneyMetrics")
+	proto.RegisterType((*CriticalUserJourneysMetrics)(nil), "soong_build_metrics.CriticalUserJourneysMetrics")
 }
 
 func init() { proto.RegisterFile("metrics.proto", fileDescriptor_6039342a2ba47b72) }
 
 var fileDescriptor_6039342a2ba47b72 = []byte{
-	// 769 bytes of a gzipped FileDescriptorProto
+	// 834 bytes of a gzipped FileDescriptorProto
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+	0xae, 0x7d, 0x7c, 0x7d, 0xe2, 0xb5, 0x08, 0xc0, 0xde, 0xc7, 0xd7, 0x27, 0xf4, 0xe4, 0x95, 0x67,
+	0x07, 0x7f, 0x5b, 0xd0, 0xa9, 0x73, 0x10, 0x02, 0x76, 0xc2, 0x64, 0x8c, 0xb3, 0xc9, 0x09, 0x71,
+	0xad, 0x6b, 0x38, 0x5d, 0xcc, 0x24, 0xc2, 0x35, 0x39, 0x02, 0x90, 0x2a, 0x12, 0x0a, 0xc7, 0x19,
+	0xce, 0x1d, 0x3b, 0x74, 0xb0, 0xa2, 0xa7, 0x18, 0x79, 0x0a, 0x8e, 0x60, 0xd1, 0xca, 0xa0, 0x36,
+	0xa2, 0x1d, 0x5d, 0x40, 0xf0, 0x08, 0x20, 0x63, 0x19, 0x17, 0x6b, 0x5a, 0x4a, 0x86, 0x53, 0xc5,
+	0x0e, 0x1d, 0x53, 0x59, 0x48, 0x16, 0xfc, 0x6b, 0x41, 0x6f, 0xca, 0x93, 0x72, 0xc5, 0xae, 0xd6,
+	0x05, 0xc3, 0x54, 0x7f, 0xc0, 0xbe, 0x39, 0x37, 0xb9, 0x96, 0x8a, 0x65, 0x98, 0xae, 0x37, 0x7c,
+	0xb1, 0xfd, 0xba, 0xdc, 0x91, 0x9a, 0x61, 0x74, 0x89, 0xb2, 0xc6, 0xc5, 0xb9, 0xbe, 0xad, 0x92,
+	0x1f, 0xc0, 0xcd, 0x50, 0x43, 0xd5, 0xba, 0xa8, 0xbb, 0x84, 0x6c, 0x63, 0x43, 0x7e, 0x84, 0x5e,
+	0x5e, 0x66, 0x94, 0x2f, 0xa9, 0x29, 0x4a, 0xec, 0xb7, 0x1b, 0xee, 0xe7, 0x65, 0x36, 0x5f, 0x9a,
+	0xfd, 0x64, 0xf0, 0x02, 0xdc, 0xc6, 0x5e, 0x77, 0xdf, 0x85, 0x03, 0xbb, 0x97, 0xf3, 0xf9, 0x4c,
+	0xbf, 0xb4, 0x0e, 0xd8, 0xd3, 0xd3, 0x8b, 0x89, 0xb7, 0x13, 0xac, 0xe0, 0xfb, 0xb1, 0x48, 0x55,
+	0x1a, 0x47, 0xab, 0x85, 0x64, 0xe2, 0x57, 0x5e, 0x8a, 0x9c, 0xad, 0xab, 0xdb, 0xbe, 0x39, 0x74,
+	0xab, 0x71, 0xe8, 0x23, 0x68, 0x57, 0x5d, 0x62, 0x4a, 0x77, 0xd8, 0xff, 0xda, 0xc0, 0x08, 0x6b,
+	0x41, 0x70, 0x0d, 0x4f, 0xb7, 0xec, 0x26, 0xeb, 0xed, 0xc6, 0x60, 0xc7, 0xe5, 0x67, 0xe9, 0x5b,
+	0xf8, 0xb1, 0x6e, 0x3f, 0xd9, 0xff, 0x4f, 0x1b, 0xa2, 0xf8, 0xec, 0xbb, 0xdf, 0xab, 0xff, 0x61,
+	0xa5, 0xa0, 0xf8, 0x93, 0xfc, 0x2f, 0x00, 0x00, 0xff, 0xff, 0x20, 0x07, 0xbc, 0xf0, 0x34, 0x07,
+	0x00, 0x00,
 }
diff --git a/ui/metrics/metrics_proto/metrics.proto b/ui/metrics/metrics_proto/metrics.proto
index 93034eb..1ea24bf 100644
--- a/ui/metrics/metrics_proto/metrics.proto
+++ b/ui/metrics/metrics_proto/metrics.proto
@@ -125,3 +125,16 @@
   // The number of logical modules.
   optional uint32 num_of_modules = 3;
 }
+
+message CriticalUserJourneyMetrics {
+  // The name of a critical user journey test.
+  optional string name = 1;
+
+  // The metrics produced when running the critical user journey test.
+  optional MetricsBase metrics = 2;
+}
+
+message CriticalUserJourneysMetrics {
+  // A set of metrics from a run of the critical user journey tests.
+  repeated CriticalUserJourneyMetrics cujs = 1;
+}
\ No newline at end of file