diff --git a/go/chromite/api/toolchain.pb.go b/go/chromite/api/toolchain.pb.go
index e839e44..d6b2049 100644
--- a/go/chromite/api/toolchain.pb.go
+++ b/go/chromite/api/toolchain.pb.go
@@ -166,10 +166,13 @@
 	// Information about artifacts available when preparing.
 	InputArtifacts []*chromiumos.BuilderConfig_Artifacts_InputArtifactInfo `protobuf:"bytes,4,rep,name=input_artifacts,json=inputArtifacts,proto3" json:"input_artifacts,omitempty"`
 	// Additional arguments used in PrepareForBuild.
-	AdditionalArgs       *chromiumos.PrepareForBuildAdditionalArgs `protobuf:"bytes,5,opt,name=additional_args,json=additionalArgs,proto3" json:"additional_args,omitempty"`
-	XXX_NoUnkeyedLiteral struct{}                                  `json:"-"`
-	XXX_unrecognized     []byte                                    `json:"-"`
-	XXX_sizecache        int32                                     `json:"-"`
+	// TODO(crbug/1019868): Transition to artifact_profile_info.
+	AdditionalArgs *chromiumos.PrepareForBuildAdditionalArgs `protobuf:"bytes,5,opt,name=additional_args,json=additionalArgs,proto3" json:"additional_args,omitempty"`
+	// Profile information used for the artifact.
+	ProfileInfo          *chromiumos.ArtifactProfileInfo `protobuf:"bytes,6,opt,name=profile_info,json=profileInfo,proto3" json:"profile_info,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                        `json:"-"`
+	XXX_unrecognized     []byte                          `json:"-"`
+	XXX_sizecache        int32                           `json:"-"`
 }
 
 func (m *PrepareForToolchainBuildRequest) Reset()         { *m = PrepareForToolchainBuildRequest{} }
@@ -232,6 +235,13 @@
 	return nil
 }
 
+func (m *PrepareForToolchainBuildRequest) GetProfileInfo() *chromiumos.ArtifactProfileInfo {
+	if m != nil {
+		return m.ProfileInfo
+	}
+	return nil
+}
+
 // TODO(crbug/1019868): Migrate to using chromiumos.PrepareForBuildResponse.
 type PrepareForToolchainBuildResponse struct {
 	BuildRelevance       PrepareForToolchainBuildResponse_BuildRelevance `protobuf:"varint,1,opt,name=build_relevance,json=buildRelevance,proto3,enum=chromite.api.PrepareForToolchainBuildResponse_BuildRelevance" json:"build_relevance,omitempty"`
@@ -282,10 +292,13 @@
 	// Which artifacts are wanted?
 	ArtifactTypes []chromiumos.BuilderConfig_Artifacts_ArtifactTypes `protobuf:"varint,4,rep,packed,name=artifact_types,json=artifactTypes,proto3,enum=chromiumos.BuilderConfig_Artifacts_ArtifactTypes" json:"artifact_types,omitempty"`
 	// Additional arguments that were used in PrepareForBuild.
-	AdditionalArgs       *chromiumos.PrepareForBuildAdditionalArgs `protobuf:"bytes,5,opt,name=additional_args,json=additionalArgs,proto3" json:"additional_args,omitempty"`
-	XXX_NoUnkeyedLiteral struct{}                                  `json:"-"`
-	XXX_unrecognized     []byte                                    `json:"-"`
-	XXX_sizecache        int32                                     `json:"-"`
+	// TODO(crbug/1019868): Transition to artifact_profile_info.
+	AdditionalArgs *chromiumos.PrepareForBuildAdditionalArgs `protobuf:"bytes,5,opt,name=additional_args,json=additionalArgs,proto3" json:"additional_args,omitempty"`
+	// Profile information used for the artifact.
+	ProfileInfo          *chromiumos.ArtifactProfileInfo `protobuf:"bytes,6,opt,name=profile_info,json=profileInfo,proto3" json:"profile_info,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                        `json:"-"`
+	XXX_unrecognized     []byte                          `json:"-"`
+	XXX_sizecache        int32                           `json:"-"`
 }
 
 func (m *BundleToolchainRequest) Reset()         { *m = BundleToolchainRequest{} }
@@ -348,6 +361,13 @@
 	return nil
 }
 
+func (m *BundleToolchainRequest) GetProfileInfo() *chromiumos.ArtifactProfileInfo {
+	if m != nil {
+		return m.ProfileInfo
+	}
+	return nil
+}
+
 // Response describing which bundles were dumped to the given output directory.
 type BundleToolchainResponse struct {
 	// The artifacts that added to the output directory.
@@ -492,60 +512,62 @@
 func init() { proto.RegisterFile("chromite/api/toolchain.proto", fileDescriptor_7ff43bdb7436d394) }
 
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 }
 
 // Reference imports to suppress errors if they are not otherwise used.
diff --git a/go/chromiumos/builder_config.pb.go b/go/chromiumos/builder_config.pb.go
index 43d8708..f1cc675 100644
--- a/go/chromiumos/builder_config.pb.go
+++ b/go/chromiumos/builder_config.pb.go
@@ -821,10 +821,12 @@
 	// There may be more than one set of publishing instructions.
 	PublishArtifacts []*BuilderConfig_Artifacts_PublishInfo `protobuf:"bytes,5,rep,name=publish_artifacts,json=publishArtifacts,proto3" json:"publish_artifacts,omitempty"`
 	// There may be more than one set of consumable artifacts.
-	InputArtifacts       []*BuilderConfig_Artifacts_InputArtifactInfo `protobuf:"bytes,6,rep,name=input_artifacts,json=inputArtifacts,proto3" json:"input_artifacts,omitempty"`
-	XXX_NoUnkeyedLiteral struct{}                                     `json:"-"`
-	XXX_unrecognized     []byte                                       `json:"-"`
-	XXX_sizecache        int32                                        `json:"-"`
+	InputArtifacts []*BuilderConfig_Artifacts_InputArtifactInfo `protobuf:"bytes,6,rep,name=input_artifacts,json=inputArtifacts,proto3" json:"input_artifacts,omitempty"`
+	// Profile information needed by artifact prepare/bundle endpoints.
+	ArtifactProfileInfo  *ArtifactProfileInfo `protobuf:"bytes,7,opt,name=artifact_profile_info,json=artifactProfileInfo,proto3" json:"artifact_profile_info,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}             `json:"-"`
+	XXX_unrecognized     []byte               `json:"-"`
+	XXX_sizecache        int32                `json:"-"`
 }
 
 func (m *BuilderConfig_Artifacts) Reset()         { *m = BuilderConfig_Artifacts{} }
@@ -894,6 +896,13 @@
 	return nil
 }
 
+func (m *BuilderConfig_Artifacts) GetArtifactProfileInfo() *ArtifactProfileInfo {
+	if m != nil {
+		return m.ArtifactProfileInfo
+	}
+	return nil
+}
+
 type BuilderConfig_Artifacts_PublishInfo struct {
 	// Artifact types to publish to this bucket.
 	PublishTypes []BuilderConfig_Artifacts_ArtifactTypes `protobuf:"varint,2,rep,packed,name=publish_types,json=publishTypes,proto3,enum=chromiumos.BuilderConfig_Artifacts_ArtifactTypes" json:"publish_types,omitempty"`
@@ -1186,6 +1195,8 @@
 }
 
 // Controls for the call to cros_artifacts.prepare_for_build.
+// TODO(crbug/1019868): Drop this after all users have switched to
+// artifacts.artifactProfileInfo.
 type BuilderConfig_Build_PrepareForBuild struct {
 	// Additional arguments from common.proto, passed into any
 	// PrepareFor*Build endpoint.
@@ -1549,139 +1560,141 @@
 func init() { proto.RegisterFile("chromiumos/builder_config.proto", fileDescriptor_6fe67302c16003fb) }
 
 var fileDescriptor_6fe67302c16003fb = []byte{
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+	0xeb, 0xcf, 0x8f, 0x33, 0x7f, 0x55, 0x5a, 0xce, 0xcc, 0xd7, 0xa3, 0xbf, 0x1e, 0x8f, 0xe7, 0x6e,
+	0x66, 0x64, 0xb2, 0xc3, 0x94, 0x5f, 0xfe, 0x3b, 0x00, 0x00, 0xff, 0xff, 0x5e, 0x88, 0x91, 0xf1,
+	0x06, 0x15, 0x00, 0x00,
 }
diff --git a/go/chromiumos/common.pb.go b/go/chromiumos/common.pb.go
index 9286c57..9c1840b 100644
--- a/go/chromiumos/common.pb.go
+++ b/go/chromiumos/common.pb.go
@@ -1077,6 +1077,7 @@
 }
 
 // Additional information about artifacts used by PrepareForBuild endpoints.
+// TODO(crbug/1019868): This is migrating to ArtifactProfileInfo.
 type PrepareForBuildAdditionalArgs struct {
 	// Types that are valid to be assigned to PrepareForBuildArgs:
 	//	*PrepareForBuildAdditionalArgs_ChromeCwpProfile
@@ -1159,6 +1160,156 @@
 	}
 }
 
+// ToolchainService Unverified Release AFDO artifacts require information
+// about the builder that created the image used to generate the unverified
+// chrome benchmark perf file.
+type AfdoRelease struct {
+	// ToolchainService Chrome AFDO artifacts require profile name.
+	ChromeCwpProfile string `protobuf:"bytes,1,opt,name=chrome_cwp_profile,json=chromeCwpProfile,proto3" json:"chrome_cwp_profile,omitempty"`
+	// The build id of the image_build.  Used to generate the location for the
+	// image archive.
+	ImageBuildId         int64    `protobuf:"varint,2,opt,name=image_build_id,json=imageBuildId,proto3" json:"image_build_id,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *AfdoRelease) Reset()         { *m = AfdoRelease{} }
+func (m *AfdoRelease) String() string { return proto.CompactTextString(m) }
+func (*AfdoRelease) ProtoMessage()    {}
+func (*AfdoRelease) Descriptor() ([]byte, []int) {
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{15}
+}
+
+func (m *AfdoRelease) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_AfdoRelease.Unmarshal(m, b)
+}
+func (m *AfdoRelease) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_AfdoRelease.Marshal(b, m, deterministic)
+}
+func (m *AfdoRelease) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_AfdoRelease.Merge(m, src)
+}
+func (m *AfdoRelease) XXX_Size() int {
+	return xxx_messageInfo_AfdoRelease.Size(m)
+}
+func (m *AfdoRelease) XXX_DiscardUnknown() {
+	xxx_messageInfo_AfdoRelease.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_AfdoRelease proto.InternalMessageInfo
+
+func (m *AfdoRelease) GetChromeCwpProfile() string {
+	if m != nil {
+		return m.ChromeCwpProfile
+	}
+	return ""
+}
+
+func (m *AfdoRelease) GetImageBuildId() int64 {
+	if m != nil {
+		return m.ImageBuildId
+	}
+	return 0
+}
+
+// Artifact profile information used by artifact prepare/bundle endpoints in
+// addition to input_artifacts.
+type ArtifactProfileInfo struct {
+	// Types that are valid to be assigned to ArtifactProfileInfo:
+	//	*ArtifactProfileInfo_ChromeCwpProfile
+	//	*ArtifactProfileInfo_KernelVersion
+	//	*ArtifactProfileInfo_AfdoRelase
+	ArtifactProfileInfo  isArtifactProfileInfo_ArtifactProfileInfo `protobuf_oneof:"artifact_profile_info"`
+	XXX_NoUnkeyedLiteral struct{}                                  `json:"-"`
+	XXX_unrecognized     []byte                                    `json:"-"`
+	XXX_sizecache        int32                                     `json:"-"`
+}
+
+func (m *ArtifactProfileInfo) Reset()         { *m = ArtifactProfileInfo{} }
+func (m *ArtifactProfileInfo) String() string { return proto.CompactTextString(m) }
+func (*ArtifactProfileInfo) ProtoMessage()    {}
+func (*ArtifactProfileInfo) Descriptor() ([]byte, []int) {
+	return fileDescriptor_fa0b57c3d7d4c63b, []int{16}
+}
+
+func (m *ArtifactProfileInfo) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ArtifactProfileInfo.Unmarshal(m, b)
+}
+func (m *ArtifactProfileInfo) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ArtifactProfileInfo.Marshal(b, m, deterministic)
+}
+func (m *ArtifactProfileInfo) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ArtifactProfileInfo.Merge(m, src)
+}
+func (m *ArtifactProfileInfo) XXX_Size() int {
+	return xxx_messageInfo_ArtifactProfileInfo.Size(m)
+}
+func (m *ArtifactProfileInfo) XXX_DiscardUnknown() {
+	xxx_messageInfo_ArtifactProfileInfo.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ArtifactProfileInfo proto.InternalMessageInfo
+
+type isArtifactProfileInfo_ArtifactProfileInfo interface {
+	isArtifactProfileInfo_ArtifactProfileInfo()
+}
+
+type ArtifactProfileInfo_ChromeCwpProfile struct {
+	ChromeCwpProfile string `protobuf:"bytes,1,opt,name=chrome_cwp_profile,json=chromeCwpProfile,proto3,oneof"`
+}
+
+type ArtifactProfileInfo_KernelVersion struct {
+	KernelVersion string `protobuf:"bytes,2,opt,name=kernel_version,json=kernelVersion,proto3,oneof"`
+}
+
+type ArtifactProfileInfo_AfdoRelase struct {
+	AfdoRelase *AfdoRelease `protobuf:"bytes,3,opt,name=afdo_relase,json=afdoRelase,proto3,oneof"`
+}
+
+func (*ArtifactProfileInfo_ChromeCwpProfile) isArtifactProfileInfo_ArtifactProfileInfo() {}
+
+func (*ArtifactProfileInfo_KernelVersion) isArtifactProfileInfo_ArtifactProfileInfo() {}
+
+func (*ArtifactProfileInfo_AfdoRelase) isArtifactProfileInfo_ArtifactProfileInfo() {}
+
+func (m *ArtifactProfileInfo) GetArtifactProfileInfo() isArtifactProfileInfo_ArtifactProfileInfo {
+	if m != nil {
+		return m.ArtifactProfileInfo
+	}
+	return nil
+}
+
+func (m *ArtifactProfileInfo) GetChromeCwpProfile() string {
+	if x, ok := m.GetArtifactProfileInfo().(*ArtifactProfileInfo_ChromeCwpProfile); ok {
+		return x.ChromeCwpProfile
+	}
+	return ""
+}
+
+func (m *ArtifactProfileInfo) GetKernelVersion() string {
+	if x, ok := m.GetArtifactProfileInfo().(*ArtifactProfileInfo_KernelVersion); ok {
+		return x.KernelVersion
+	}
+	return ""
+}
+
+func (m *ArtifactProfileInfo) GetAfdoRelase() *AfdoRelease {
+	if x, ok := m.GetArtifactProfileInfo().(*ArtifactProfileInfo_AfdoRelase); ok {
+		return x.AfdoRelase
+	}
+	return nil
+}
+
+// XXX_OneofWrappers is for the internal use of the proto package.
+func (*ArtifactProfileInfo) XXX_OneofWrappers() []interface{} {
+	return []interface{}{
+		(*ArtifactProfileInfo_ChromeCwpProfile)(nil),
+		(*ArtifactProfileInfo_KernelVersion)(nil),
+		(*ArtifactProfileInfo_AfdoRelase)(nil),
+	}
+}
+
 func init() {
 	proto.RegisterEnum("chromiumos.ImageType", ImageType_name, ImageType_value)
 	proto.RegisterEnum("chromiumos.Channel", Channel_name, Channel_value)
@@ -1182,88 +1333,95 @@
 	proto.RegisterType((*ProtoBytes)(nil), "chromiumos.ProtoBytes")
 	proto.RegisterType((*PrepareForBuildResponse)(nil), "chromiumos.PrepareForBuildResponse")
 	proto.RegisterType((*PrepareForBuildAdditionalArgs)(nil), "chromiumos.PrepareForBuildAdditionalArgs")
+	proto.RegisterType((*AfdoRelease)(nil), "chromiumos.AfdoRelease")
+	proto.RegisterType((*ArtifactProfileInfo)(nil), "chromiumos.ArtifactProfileInfo")
 }
 
 func init() { proto.RegisterFile("chromiumos/common.proto", fileDescriptor_fa0b57c3d7d4c63b) }
 
 var fileDescriptor_fa0b57c3d7d4c63b = []byte{
-	// 1238 bytes of a gzipped FileDescriptorProto
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-	0xac, 0x59, 0x72, 0xe6, 0xb1, 0xf5, 0x9a, 0x45, 0xbd, 0x98, 0xb3, 0x94, 0x21, 0xd8, 0x11, 0xda,
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+	0x2e, 0x59, 0x92, 0x16, 0x39, 0x8a, 0xb7, 0x28, 0x4d, 0xcc, 0xd9, 0x7b, 0xea, 0xa5, 0x79, 0xd5,
+	0x0a, 0x12, 0x3d, 0x82, 0xaa, 0x27, 0xf5, 0x64, 0xcd, 0x14, 0x9c, 0x53, 0xa2, 0xd0, 0x31, 0x49,
+	0xbd, 0x65, 0x42, 0x53, 0xb9, 0x20, 0x0a, 0x5e, 0xd3, 0xda, 0x0f, 0xd0, 0x1e, 0x07, 0xa9, 0xe8,
+	0xa0, 0xc1, 0x56, 0xab, 0x20, 0xfd, 0x9b, 0x2e, 0x3b, 0x50, 0x0e, 0xe6, 0x79, 0x8b, 0xca, 0xc1,
+	0x5c, 0xa4, 0xc4, 0xe9, 0x22, 0xbf, 0x61, 0xe2, 0x29, 0x9d, 0xb3, 0x24, 0x90, 0x2d, 0x11, 0x9b,
+	0xd5, 0xc6, 0x6b, 0x5a, 0xdb, 0x87, 0x5a, 0x7e, 0xaf, 0x84, 0x5b, 0x71, 0xd3, 0x0a, 0xb7, 0xe2,
+	0xad, 0x7d, 0x03, 0x30, 0x11, 0xb7, 0x7b, 0x70, 0x93, 0xd2, 0x04, 0xfd, 0x0f, 0xd4, 0x84, 0xf2,
+	0x80, 0x84, 0xc1, 0x27, 0x3a, 0x77, 0xe5, 0x51, 0x97, 0xd2, 0x2d, 0xbc, 0xbb, 0xc1, 0xa5, 0xbc,
+	0xf6, 0x6b, 0x09, 0xf6, 0x26, 0x9c, 0xc6, 0x84, 0xd3, 0x11, 0xe3, 0xf2, 0xd4, 0x63, 0x9a, 0xc4,
+	0x2c, 0x4a, 0x28, 0xfa, 0x1e, 0x76, 0xdf, 0x09, 0xc0, 0xe5, 0x34, 0xa4, 0xd7, 0x24, 0xf2, 0xb2,
+	0xd9, 0xec, 0xf4, 0xfb, 0xb7, 0x5a, 0xf6, 0x65, 0xed, 0x5e, 0x4e, 0xe5, 0x9a, 0xb8, 0xf3, 0xee,
+	0x16, 0xad, 0x59, 0xd0, 0xb9, 0x2d, 0x21, 0xc6, 0xe9, 0xf6, 0x16, 0x03, 0x54, 0x6d, 0xd3, 0x1c,
+	0x9a, 0xc3, 0x6c, 0x9c, 0xce, 0xed, 0x37, 0xb6, 0xf3, 0xd6, 0x56, 0xcb, 0xa8, 0x0d, 0x8d, 0x89,
+	0x63, 0xd9, 0xb3, 0x53, 0x73, 0x3a, 0x55, 0x15, 0xed, 0xa7, 0x12, 0xec, 0xdf, 0x89, 0x42, 0x9f,
+	0xcf, 0x65, 0xdd, 0x48, 0xa8, 0x73, 0x3f, 0x41, 0x3d, 0x40, 0xf9, 0x67, 0xc3, 0xfb, 0x18, 0x8b,
+	0x82, 0x6c, 0x56, 0xfb, 0x64, 0x07, 0xab, 0x19, 0xcf, 0xf8, 0x18, 0x4f, 0x32, 0x0e, 0xfa, 0x2f,
+	0x74, 0x3e, 0x50, 0x1e, 0xd1, 0xd0, 0x2d, 0x56, 0xab, 0x9c, 0xcb, 0xb6, 0x33, 0xfc, 0x22, 0x83,
+	0x07, 0x5d, 0x78, 0x14, 0x67, 0x9e, 0xdd, 0x05, 0xe3, 0x6e, 0x56, 0x2e, 0xc2, 0xfd, 0x44, 0x23,
+	0xd0, 0xd4, 0x17, 0x73, 0x26, 0xd2, 0x23, 0x09, 0x45, 0xff, 0xff, 0xf3, 0x08, 0xbe, 0xe0, 0xff,
+	0x39, 0x74, 0x82, 0x95, 0x38, 0x08, 0x99, 0xc1, 0x60, 0x2e, 0xfd, 0x2b, 0xb8, 0x25, 0x51, 0x99,
+	0xa1, 0x35, 0xd7, 0x7e, 0x2b, 0xc1, 0x83, 0xe2, 0x6c, 0xe5, 0x9a, 0xf2, 0xa0, 0xfc, 0x53, 0xd9,
+	0xa2, 0x6f, 0xa1, 0x49, 0x16, 0x73, 0x26, 0xe6, 0x81, 0x24, 0x34, 0xff, 0x6a, 0xef, 0x6d, 0x0f,
+	0xc3, 0x56, 0xca, 0x27, 0x3b, 0x18, 0x48, 0x46, 0x92, 0x84, 0x0e, 0xf6, 0xe0, 0x21, 0xc9, 0x63,
+	0x2d, 0x42, 0x72, 0x83, 0x68, 0xc1, 0x8e, 0x7e, 0x29, 0x41, 0xc3, 0x12, 0x69, 0xcd, 0x6e, 0x62,
+	0xf1, 0x01, 0xfd, 0x97, 0x75, 0xa6, 0x8f, 0x4d, 0x77, 0x76, 0x39, 0x31, 0xdd, 0x73, 0x7b, 0x68,
+	0x8e, 0x2c, 0x5b, 0x4e, 0x43, 0x1d, 0x2a, 0x03, 0x7d, 0x2a, 0x4e, 0x4b, 0x0d, 0x94, 0xa1, 0x79,
+	0xa1, 0x96, 0x05, 0x34, 0x33, 0xa7, 0x33, 0x55, 0x11, 0xe3, 0x21, 0x98, 0xee, 0xc5, 0x99, 0x5a,
+	0x11, 0x84, 0x80, 0x05, 0x71, 0x4f, 0x5e, 0x7f, 0xd3, 0x70, 0x2e, 0x4c, 0x7c, 0xa9, 0x56, 0x05,
+	0x6b, 0xa4, 0x1b, 0x33, 0x07, 0x5f, 0xaa, 0x35, 0xc1, 0x1a, 0x59, 0xf8, 0xec, 0xad, 0x8e, 0x4d,
+	0xb5, 0x8e, 0xee, 0x43, 0xdb, 0xc0, 0xaf, 0x5e, 0xb8, 0x6b, 0xa8, 0x21, 0x20, 0x69, 0x75, 0x7c,
+	0x9e, 0x9b, 0x03, 0x01, 0x49, 0xdb, 0x6b, 0xa8, 0x79, 0xb4, 0x82, 0x9a, 0xb8, 0x41, 0x11, 0x0d,
+	0xd1, 0x1e, 0x3c, 0x30, 0x4e, 0x74, 0xdb, 0x36, 0x4f, 0xef, 0x7c, 0x90, 0x10, 0x74, 0x0a, 0xc6,
+	0x74, 0xa6, 0x0f, 0x4e, 0x45, 0x1a, 0x2a, 0xb4, 0x0a, 0x6c, 0x60, 0xce, 0xf4, 0xec, 0xdb, 0x54,
+	0x20, 0x22, 0x41, 0x65, 0x5b, 0xcd, 0xd0, 0x6d, 0x1d, 0x5f, 0xaa, 0x95, 0xa3, 0x05, 0xa8, 0xfa,
+	0x68, 0xe8, 0x14, 0x8d, 0x97, 0x55, 0x6b, 0x43, 0xc3, 0x76, 0xec, 0xac, 0x68, 0xea, 0x8e, 0x20,
+	0x1d, 0x3c, 0x34, 0xf1, 0xc8, 0x92, 0x8e, 0x10, 0x74, 0x06, 0xa6, 0x6d, 0x9c, 0x9c, 0xe9, 0xf8,
+	0x8d, 0x2b, 0x74, 0x33, 0x57, 0x6f, 0x4c, 0x2c, 0x0c, 0x4b, 0x40, 0xc9, 0x7c, 0x63, 0xe7, 0xcc,
+	0xcc, 0x80, 0xca, 0xe0, 0xeb, 0xef, 0x5e, 0xfa, 0x6c, 0xdd, 0xdb, 0x1e, 0xe3, 0xfe, 0xf1, 0xd6,
+	0x1f, 0xc6, 0x20, 0x5a, 0x70, 0x72, 0x2c, 0x4f, 0xcb, 0xb1, 0xcf, 0xb6, 0x38, 0xef, 0xaa, 0x12,
+	0xfc, 0xea, 0x8f, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x3e, 0x8a, 0xf5, 0x5f, 0x0a, 0x00, 0x00,
 }
diff --git a/src/chromite/api/toolchain.proto b/src/chromite/api/toolchain.proto
index 7c29063..83c0914 100644
--- a/src/chromite/api/toolchain.proto
+++ b/src/chromite/api/toolchain.proto
@@ -36,7 +36,11 @@
   repeated chromiumos.BuilderConfig.Artifacts.InputArtifactInfo input_artifacts = 4;
 
   // Additional arguments used in PrepareForBuild.
+  // TODO(crbug/1019868): Transition to artifact_profile_info.
   chromiumos.PrepareForBuildAdditionalArgs additional_args = 5;
+
+  // Profile information used for the artifact.
+  chromiumos.ArtifactProfileInfo profile_info = 6;
 }
 
 // TODO(crbug/1019868): Migrate to using chromiumos.PrepareForBuildResponse.
@@ -68,7 +72,11 @@
   repeated chromiumos.BuilderConfig.Artifacts.ArtifactTypes artifact_types = 4;
 
   // Additional arguments that were used in PrepareForBuild.
+  // TODO(crbug/1019868): Transition to artifact_profile_info.
   chromiumos.PrepareForBuildAdditionalArgs additional_args = 5;
+
+  // Profile information used for the artifact.
+  chromiumos.ArtifactProfileInfo profile_info = 6;
 }
 
 // Response describing which bundles were dumped to the given output directory.
diff --git a/src/chromiumos/builder_config.proto b/src/chromiumos/builder_config.proto
index 72006a1..21445d7 100644
--- a/src/chromiumos/builder_config.proto
+++ b/src/chromiumos/builder_config.proto
@@ -266,6 +266,9 @@
     }
     // There may be more than one set of consumable artifacts.
     repeated InputArtifactInfo input_artifacts = 6;
+
+    // Profile information needed by artifact prepare/bundle endpoints.
+    ArtifactProfileInfo artifact_profile_info = 7;
   }
   Artifacts artifacts = 4;
 
@@ -301,6 +304,8 @@
     // generally called, rather than in numerical order.
 
     // Controls for the call to cros_artifacts.prepare_for_build.
+    // TODO(crbug/1019868): Drop this after all users have switched to
+    // artifacts.artifactProfileInfo.
     message PrepareForBuild {
       // Additional arguments from common.proto, passed into any
       // PrepareFor*Build endpoint.
diff --git a/src/chromiumos/common.proto b/src/chromiumos/common.proto
index c4c3653..fa586d6 100644
--- a/src/chromiumos/common.proto
+++ b/src/chromiumos/common.proto
@@ -235,6 +235,7 @@
 }
 
 // Additional information about artifacts used by PrepareForBuild endpoints.
+// TODO(crbug/1019868): This is migrating to ArtifactProfileInfo.
 message PrepareForBuildAdditionalArgs {
   oneof prepare_for_build_args {
     // ToolchainService Chrome AFDO artifacts require profile name.
@@ -244,3 +245,30 @@
     string kernel_version = 2;
   }
 }
+
+// ToolchainService Unverified Release AFDO artifacts require information
+// about the builder that created the image used to generate the unverified
+// chrome benchmark perf file.
+message AfdoRelease {
+  // ToolchainService Chrome AFDO artifacts require profile name.
+  string chrome_cwp_profile = 1;
+
+  // The build id of the image_build.  Used to generate the location for the
+  // image archive.
+  int64 image_build_id = 2;
+}
+
+// Artifact profile information used by artifact prepare/bundle endpoints in
+// addition to input_artifacts.
+message ArtifactProfileInfo {
+  oneof artifact_profile_info {
+    // ToolchainService Chrome AFDO artifacts require profile name.
+    string chrome_cwp_profile = 1;
+
+    // ToolchainService Kernel AFDO artifacts require a kernel version.
+    string kernel_version = 2;
+
+    // ToolchainService Unverified Release AFDO artifacts require more.
+    AfdoRelease afdo_relase = 3;
+  }
+}