diff --git a/go/chromite/api/payload.pb.go b/go/chromite/api/payload.pb.go
index 90a5aa1..b7d0902 100644
--- a/go/chromite/api/payload.pb.go
+++ b/go/chromite/api/payload.pb.go
@@ -495,10 +495,11 @@
 type GenerationResponse struct {
 	// Whether we've completed successfully.
 	Success bool `protobuf:"varint,1,opt,name=success,proto3" json:"success,omitempty"`
-	// If successful we may have uploaded an artifact to google storage. This will
-	// have a random bit included, but is otherwise deterministic with the input
-	// properties. Return it so we can find the artifact.
-	UniqueId             string   `protobuf:"bytes,2,opt,name=unique_id,json=uniqueId,proto3" json:"unique_id,omitempty"`
+	// If successful we may have a local artifact available. Generally this takes
+	// the form of '/tmp/ioadwjoawjd/delta.bin'.
+	LocalPath string `protobuf:"bytes,2,opt,name=local_path,json=localPath,proto3" json:"local_path,omitempty"`
+	// If successful we may have uploaded an artifact to google storage.
+	RemoteUri            string   `protobuf:"bytes,3,opt,name=remote_uri,json=remoteUri,proto3" json:"remote_uri,omitempty"`
 	XXX_NoUnkeyedLiteral struct{} `json:"-"`
 	XXX_unrecognized     []byte   `json:"-"`
 	XXX_sizecache        int32    `json:"-"`
@@ -536,9 +537,16 @@
 	return false
 }
 
-func (m *GenerationResponse) GetUniqueId() string {
+func (m *GenerationResponse) GetLocalPath() string {
 	if m != nil {
-		return m.UniqueId
+		return m.LocalPath
+	}
+	return ""
+}
+
+func (m *GenerationResponse) GetRemoteUri() string {
+	if m != nil {
+		return m.RemoteUri
 	}
 	return ""
 }
@@ -555,49 +563,50 @@
 func init() { proto.RegisterFile("chromite/api/payload.proto", fileDescriptor_0ecdf1e4e8bef7a4) }
 
 var fileDescriptor_0ecdf1e4e8bef7a4 = []byte{
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+	// 688 bytes of a gzipped FileDescriptorProto
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 }
 
 // Reference imports to suppress errors if they are not otherwise used.
diff --git a/src/chromite/api/payload.proto b/src/chromite/api/payload.proto
index 1d0bd08..7c484e1 100644
--- a/src/chromite/api/payload.proto
+++ b/src/chromite/api/payload.proto
@@ -107,10 +107,12 @@
   // Whether we've completed successfully.
   bool success = 1;
 
-  // If successful we may have uploaded an artifact to google storage. This will
-  // have a random bit included, but is otherwise deterministic with the input
-  // properties. Return it so we can find the artifact.
-  string unique_id = 2;
+  // If successful we may have a local artifact available. Generally this takes
+  // the form of '/tmp/ioadwjoawjd/delta.bin'.
+  string local_path = 2;
+
+  // If successful we may have uploaded an artifact to google storage.
+  string remote_uri = 3;
 }
 
 // The image service definition.