diff --git a/go.mod b/go.mod
index 5669cf1f..9e12be04 100644
--- a/go.mod
+++ b/go.mod
@@ -89,7 +89,7 @@ require (
 	golang.org/x/text v0.9.0 // indirect
 	golang.org/x/time v0.1.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
-	google.golang.org/protobuf v1.28.1 // indirect
+	google.golang.org/protobuf v1.28.1
 	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
diff --git a/proto/apiv2/example.proto b/proto/apiv2/example.proto
new file mode 100644
index 00000000..ac4dc7a2
--- /dev/null
+++ b/proto/apiv2/example.proto
@@ -0,0 +1,12 @@
+syntax = "proto3";
+
+package memos.apiv2;
+
+option go_package = "gen-go/apiv2";
+
+// Person is a simple message type containing information about a person.
+// It is an example of the kind of message that one might define in a protobufs file.
+message Person {
+  string name = 1;
+  int32 id = 2;
+}
diff --git a/proto/buf.gen.yaml b/proto/buf.gen.yaml
new file mode 100644
index 00000000..1454b7f4
--- /dev/null
+++ b/proto/buf.gen.yaml
@@ -0,0 +1,5 @@
+version: v1
+plugins:
+  - plugin: go
+    out: gen-go
+    opt: paths=source_relative
diff --git a/proto/buf.yaml b/proto/buf.yaml
new file mode 100644
index 00000000..ece50e92
--- /dev/null
+++ b/proto/buf.yaml
@@ -0,0 +1,10 @@
+version: v1
+name: buf.build/yourselfhosted/memos
+breaking:
+  use:
+    - FILE
+lint:
+  use:
+    - DEFAULT
+  except:
+    - PACKAGE_DIRECTORY_MATCH
diff --git a/proto/gen-go/apiv2/example.pb.go b/proto/gen-go/apiv2/example.pb.go
new file mode 100644
index 00000000..0211478a
--- /dev/null
+++ b/proto/gen-go/apiv2/example.pb.go
@@ -0,0 +1,153 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.29.0
+// 	protoc        (unknown)
+// source: apiv2/example.proto
+
+package apiv2
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// Person is a simple message type containing information about a person.
+// It is an example of the kind of message that one might define in a protobufs file.
+type Person struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	Id   int32  `protobuf:"varint,2,opt,name=id,proto3" json:"id,omitempty"`
+}
+
+func (x *Person) Reset() {
+	*x = Person{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_apiv2_example_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Person) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Person) ProtoMessage() {}
+
+func (x *Person) ProtoReflect() protoreflect.Message {
+	mi := &file_apiv2_example_proto_msgTypes[0]
+	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 Person.ProtoReflect.Descriptor instead.
+func (*Person) Descriptor() ([]byte, []int) {
+	return file_apiv2_example_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Person) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+func (x *Person) GetId() int32 {
+	if x != nil {
+		return x.Id
+	}
+	return 0
+}
+
+var File_apiv2_example_proto protoreflect.FileDescriptor
+
+var file_apiv2_example_proto_rawDesc = []byte{
+	0x0a, 0x13, 0x61, 0x70, 0x69, 0x76, 0x32, 0x2f, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x2e,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x0b, 0x6d, 0x65, 0x6d, 0x6f, 0x73, 0x2e, 0x61, 0x70, 0x69,
+	0x76, 0x32, 0x22, 0x2c, 0x0a, 0x06, 0x50, 0x65, 0x72, 0x73, 0x6f, 0x6e, 0x12, 0x12, 0x0a, 0x04,
+	0x6e, 0x61, 0x6d, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x6e, 0x61, 0x6d, 0x65,
+	0x12, 0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18, 0x02, 0x20, 0x01, 0x28, 0x05, 0x52, 0x02, 0x69, 0x64,
+	0x42, 0x0e, 0x5a, 0x0c, 0x67, 0x65, 0x6e, 0x2d, 0x67, 0x6f, 0x2f, 0x61, 0x70, 0x69, 0x76, 0x32,
+	0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_apiv2_example_proto_rawDescOnce sync.Once
+	file_apiv2_example_proto_rawDescData = file_apiv2_example_proto_rawDesc
+)
+
+func file_apiv2_example_proto_rawDescGZIP() []byte {
+	file_apiv2_example_proto_rawDescOnce.Do(func() {
+		file_apiv2_example_proto_rawDescData = protoimpl.X.CompressGZIP(file_apiv2_example_proto_rawDescData)
+	})
+	return file_apiv2_example_proto_rawDescData
+}
+
+var file_apiv2_example_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_apiv2_example_proto_goTypes = []interface{}{
+	(*Person)(nil), // 0: memos.apiv2.Person
+}
+var file_apiv2_example_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_apiv2_example_proto_init() }
+func file_apiv2_example_proto_init() {
+	if File_apiv2_example_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_apiv2_example_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Person); 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{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_apiv2_example_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_apiv2_example_proto_goTypes,
+		DependencyIndexes: file_apiv2_example_proto_depIdxs,
+		MessageInfos:      file_apiv2_example_proto_msgTypes,
+	}.Build()
+	File_apiv2_example_proto = out.File
+	file_apiv2_example_proto_rawDesc = nil
+	file_apiv2_example_proto_goTypes = nil
+	file_apiv2_example_proto_depIdxs = nil
+}
diff --git a/proto/gen-go/store/tag.pb.go b/proto/gen-go/store/tag.pb.go
new file mode 100644
index 00000000..69eca926
--- /dev/null
+++ b/proto/gen-go/store/tag.pb.go
@@ -0,0 +1,151 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.29.0
+// 	protoc        (unknown)
+// source: store/tag.proto
+
+package store
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Tag struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Name      string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	CreatorId int32  `protobuf:"varint,2,opt,name=creator_id,json=creatorId,proto3" json:"creator_id,omitempty"`
+}
+
+func (x *Tag) Reset() {
+	*x = Tag{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_store_tag_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Tag) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Tag) ProtoMessage() {}
+
+func (x *Tag) ProtoReflect() protoreflect.Message {
+	mi := &file_store_tag_proto_msgTypes[0]
+	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 Tag.ProtoReflect.Descriptor instead.
+func (*Tag) Descriptor() ([]byte, []int) {
+	return file_store_tag_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Tag) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+func (x *Tag) GetCreatorId() int32 {
+	if x != nil {
+		return x.CreatorId
+	}
+	return 0
+}
+
+var File_store_tag_proto protoreflect.FileDescriptor
+
+var file_store_tag_proto_rawDesc = []byte{
+	0x0a, 0x0f, 0x73, 0x74, 0x6f, 0x72, 0x65, 0x2f, 0x74, 0x61, 0x67, 0x2e, 0x70, 0x72, 0x6f, 0x74,
+	0x6f, 0x12, 0x0b, 0x6d, 0x65, 0x6d, 0x6f, 0x73, 0x2e, 0x73, 0x74, 0x6f, 0x72, 0x65, 0x22, 0x38,
+	0x0a, 0x03, 0x54, 0x61, 0x67, 0x12, 0x12, 0x0a, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x01, 0x20,
+	0x01, 0x28, 0x09, 0x52, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x12, 0x1d, 0x0a, 0x0a, 0x63, 0x72, 0x65,
+	0x61, 0x74, 0x6f, 0x72, 0x5f, 0x69, 0x64, 0x18, 0x02, 0x20, 0x01, 0x28, 0x05, 0x52, 0x09, 0x63,
+	0x72, 0x65, 0x61, 0x74, 0x6f, 0x72, 0x49, 0x64, 0x42, 0x0e, 0x5a, 0x0c, 0x67, 0x65, 0x6e, 0x2d,
+	0x67, 0x6f, 0x2f, 0x73, 0x74, 0x6f, 0x72, 0x65, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_store_tag_proto_rawDescOnce sync.Once
+	file_store_tag_proto_rawDescData = file_store_tag_proto_rawDesc
+)
+
+func file_store_tag_proto_rawDescGZIP() []byte {
+	file_store_tag_proto_rawDescOnce.Do(func() {
+		file_store_tag_proto_rawDescData = protoimpl.X.CompressGZIP(file_store_tag_proto_rawDescData)
+	})
+	return file_store_tag_proto_rawDescData
+}
+
+var file_store_tag_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_store_tag_proto_goTypes = []interface{}{
+	(*Tag)(nil), // 0: memos.store.Tag
+}
+var file_store_tag_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_store_tag_proto_init() }
+func file_store_tag_proto_init() {
+	if File_store_tag_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_store_tag_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Tag); 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{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_store_tag_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_store_tag_proto_goTypes,
+		DependencyIndexes: file_store_tag_proto_depIdxs,
+		MessageInfos:      file_store_tag_proto_msgTypes,
+	}.Build()
+	File_store_tag_proto = out.File
+	file_store_tag_proto_rawDesc = nil
+	file_store_tag_proto_goTypes = nil
+	file_store_tag_proto_depIdxs = nil
+}
diff --git a/proto/store/tag.proto b/proto/store/tag.proto
new file mode 100644
index 00000000..cf57422d
--- /dev/null
+++ b/proto/store/tag.proto
@@ -0,0 +1,10 @@
+syntax = "proto3";
+
+package memos.store;
+
+option go_package = "gen-go/store";
+
+message Tag {
+  string name = 1;
+  int32 creator_id = 2;
+}