diff --git a/proto/gen/api/v1/memo_service.pb.go b/proto/gen/api/v1/memo_service.pb.go
index eead3f337..4727f7a05 100644
--- a/proto/gen/api/v1/memo_service.pb.go
+++ b/proto/gen/api/v1/memo_service.pb.go
@@ -1869,6 +1869,159 @@ func (x *DeleteMemoReactionRequest) GetName() string {
 	return ""
 }
 
+type SuggestMemoTagsRequest struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// Required. The content of the memo for tag suggestion.
+	Content string `protobuf:"bytes,1,opt,name=content,proto3" json:"content,omitempty"`
+	// Optional. The existing tags for the memo.
+	ExistingTags  []string `protobuf:"bytes,2,rep,name=existing_tags,json=existingTags,proto3" json:"existing_tags,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *SuggestMemoTagsRequest) Reset() {
+	*x = SuggestMemoTagsRequest{}
+	mi := &file_api_v1_memo_service_proto_msgTypes[25]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *SuggestMemoTagsRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*SuggestMemoTagsRequest) ProtoMessage() {}
+
+func (x *SuggestMemoTagsRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_api_v1_memo_service_proto_msgTypes[25]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use SuggestMemoTagsRequest.ProtoReflect.Descriptor instead.
+func (*SuggestMemoTagsRequest) Descriptor() ([]byte, []int) {
+	return file_api_v1_memo_service_proto_rawDescGZIP(), []int{25}
+}
+
+func (x *SuggestMemoTagsRequest) GetContent() string {
+	if x != nil {
+		return x.Content
+	}
+	return ""
+}
+
+func (x *SuggestMemoTagsRequest) GetExistingTags() []string {
+	if x != nil {
+		return x.ExistingTags
+	}
+	return nil
+}
+
+type TagSuggestion struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// The suggested tag name.
+	Tag string `protobuf:"bytes,1,opt,name=tag,proto3" json:"tag,omitempty"`
+	// The reason why this tag is recommended.
+	Reason        string `protobuf:"bytes,2,opt,name=reason,proto3" json:"reason,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *TagSuggestion) Reset() {
+	*x = TagSuggestion{}
+	mi := &file_api_v1_memo_service_proto_msgTypes[26]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *TagSuggestion) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*TagSuggestion) ProtoMessage() {}
+
+func (x *TagSuggestion) ProtoReflect() protoreflect.Message {
+	mi := &file_api_v1_memo_service_proto_msgTypes[26]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use TagSuggestion.ProtoReflect.Descriptor instead.
+func (*TagSuggestion) Descriptor() ([]byte, []int) {
+	return file_api_v1_memo_service_proto_rawDescGZIP(), []int{26}
+}
+
+func (x *TagSuggestion) GetTag() string {
+	if x != nil {
+		return x.Tag
+	}
+	return ""
+}
+
+func (x *TagSuggestion) GetReason() string {
+	if x != nil {
+		return x.Reason
+	}
+	return ""
+}
+
+type SuggestMemoTagsResponse struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// The suggested tags with reasons for the memo.
+	SuggestedTags []*TagSuggestion `protobuf:"bytes,1,rep,name=suggested_tags,json=suggestedTags,proto3" json:"suggested_tags,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *SuggestMemoTagsResponse) Reset() {
+	*x = SuggestMemoTagsResponse{}
+	mi := &file_api_v1_memo_service_proto_msgTypes[27]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *SuggestMemoTagsResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*SuggestMemoTagsResponse) ProtoMessage() {}
+
+func (x *SuggestMemoTagsResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_api_v1_memo_service_proto_msgTypes[27]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use SuggestMemoTagsResponse.ProtoReflect.Descriptor instead.
+func (*SuggestMemoTagsResponse) Descriptor() ([]byte, []int) {
+	return file_api_v1_memo_service_proto_rawDescGZIP(), []int{27}
+}
+
+func (x *SuggestMemoTagsResponse) GetSuggestedTags() []*TagSuggestion {
+	if x != nil {
+		return x.SuggestedTags
+	}
+	return nil
+}
+
 // Computed properties of a memo.
 type Memo_Property struct {
 	state              protoimpl.MessageState `protogen:"open.v1"`
@@ -1882,7 +2035,7 @@ type Memo_Property struct {
 
 func (x *Memo_Property) Reset() {
 	*x = Memo_Property{}
-	mi := &file_api_v1_memo_service_proto_msgTypes[25]
+	mi := &file_api_v1_memo_service_proto_msgTypes[28]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1894,7 +2047,7 @@ func (x *Memo_Property) String() string {
 func (*Memo_Property) ProtoMessage() {}
 
 func (x *Memo_Property) ProtoReflect() protoreflect.Message {
-	mi := &file_api_v1_memo_service_proto_msgTypes[25]
+	mi := &file_api_v1_memo_service_proto_msgTypes[28]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1952,7 +2105,7 @@ type MemoRelation_Memo struct {
 
 func (x *MemoRelation_Memo) Reset() {
 	*x = MemoRelation_Memo{}
-	mi := &file_api_v1_memo_service_proto_msgTypes[26]
+	mi := &file_api_v1_memo_service_proto_msgTypes[29]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1964,7 +2117,7 @@ func (x *MemoRelation_Memo) String() string {
 func (*MemoRelation_Memo) ProtoMessage() {}
 
 func (x *MemoRelation_Memo) ProtoReflect() protoreflect.Message {
-	mi := &file_api_v1_memo_service_proto_msgTypes[26]
+	mi := &file_api_v1_memo_service_proto_msgTypes[29]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2167,14 +2320,22 @@ const file_api_v1_memo_service_proto_rawDesc = "" +
 	"\breaction\x18\x02 \x01(\v2\x16.memos.api.v1.ReactionB\x03\xe0A\x02R\breaction\"N\n" +
 	"\x19DeleteMemoReactionRequest\x121\n" +
 	"\x04name\x18\x01 \x01(\tB\x1d\xe0A\x02\xfaA\x17\n" +
-	"\x15memos.api.v1/ReactionR\x04name*P\n" +
+	"\x15memos.api.v1/ReactionR\x04name\"a\n" +
+	"\x16SuggestMemoTagsRequest\x12\x1d\n" +
+	"\acontent\x18\x01 \x01(\tB\x03\xe0A\x02R\acontent\x12(\n" +
+	"\rexisting_tags\x18\x02 \x03(\tB\x03\xe0A\x01R\fexistingTags\"C\n" +
+	"\rTagSuggestion\x12\x15\n" +
+	"\x03tag\x18\x01 \x01(\tB\x03\xe0A\x02R\x03tag\x12\x1b\n" +
+	"\x06reason\x18\x02 \x01(\tB\x03\xe0A\x02R\x06reason\"]\n" +
+	"\x17SuggestMemoTagsResponse\x12B\n" +
+	"\x0esuggested_tags\x18\x01 \x03(\v2\x1b.memos.api.v1.TagSuggestionR\rsuggestedTags*P\n" +
 	"\n" +
 	"Visibility\x12\x1a\n" +
 	"\x16VISIBILITY_UNSPECIFIED\x10\x00\x12\v\n" +
 	"\aPRIVATE\x10\x01\x12\r\n" +
 	"\tPROTECTED\x10\x02\x12\n" +
 	"\n" +
-	"\x06PUBLIC\x10\x032\xef\x10\n" +
+	"\x06PUBLIC\x10\x032\xf7\x11\n" +
 	"\vMemoService\x12e\n" +
 	"\n" +
 	"CreateMemo\x12\x1f.memos.api.v1.CreateMemoRequest\x1a\x12.memos.api.v1.Memo\"\"\xdaA\x04memo\x82\xd3\xe4\x93\x02\x15:\x04memo\"\r/api/v1/memos\x12f\n" +
@@ -2195,7 +2356,8 @@ const file_api_v1_memo_service_proto_rawDesc = "" +
 	"\x10ListMemoComments\x12%.memos.api.v1.ListMemoCommentsRequest\x1a&.memos.api.v1.ListMemoCommentsResponse\".\xdaA\x04name\x82\xd3\xe4\x93\x02!\x12\x1f/api/v1/{name=memos/*}/comments\x12\x95\x01\n" +
 	"\x11ListMemoReactions\x12&.memos.api.v1.ListMemoReactionsRequest\x1a'.memos.api.v1.ListMemoReactionsResponse\"/\xdaA\x04name\x82\xd3\xe4\x93\x02\"\x12 /api/v1/{name=memos/*}/reactions\x12\x89\x01\n" +
 	"\x12UpsertMemoReaction\x12'.memos.api.v1.UpsertMemoReactionRequest\x1a\x16.memos.api.v1.Reaction\"2\xdaA\x04name\x82\xd3\xe4\x93\x02%:\x01*\" /api/v1/{name=memos/*}/reactions\x12\x80\x01\n" +
-	"\x12DeleteMemoReaction\x12'.memos.api.v1.DeleteMemoReactionRequest\x1a\x16.google.protobuf.Empty\")\xdaA\x04name\x82\xd3\xe4\x93\x02\x1c*\x1a/api/v1/{name=reactions/*}B\xa8\x01\n" +
+	"\x12DeleteMemoReaction\x12'.memos.api.v1.DeleteMemoReactionRequest\x1a\x16.google.protobuf.Empty\")\xdaA\x04name\x82\xd3\xe4\x93\x02\x1c*\x1a/api/v1/{name=reactions/*}\x12\x85\x01\n" +
+	"\x0fSuggestMemoTags\x12$.memos.api.v1.SuggestMemoTagsRequest\x1a%.memos.api.v1.SuggestMemoTagsResponse\"%\x82\xd3\xe4\x93\x02\x1f:\x01*\"\x1a/api/v1/memos:suggest-tagsB\xa8\x01\n" +
 	"\x10com.memos.api.v1B\x10MemoServiceProtoP\x01Z0github.com/usememos/memos/proto/gen/api/v1;apiv1\xa2\x02\x03MAX\xaa\x02\fMemos.Api.V1\xca\x02\fMemos\\Api\\V1\xe2\x02\x18Memos\\Api\\V1\\GPBMetadata\xea\x02\x0eMemos::Api::V1b\x06proto3"
 
 var (
@@ -2211,7 +2373,7 @@ func file_api_v1_memo_service_proto_rawDescGZIP() []byte {
 }
 
 var file_api_v1_memo_service_proto_enumTypes = make([]protoimpl.EnumInfo, 2)
-var file_api_v1_memo_service_proto_msgTypes = make([]protoimpl.MessageInfo, 27)
+var file_api_v1_memo_service_proto_msgTypes = make([]protoimpl.MessageInfo, 30)
 var file_api_v1_memo_service_proto_goTypes = []any{
 	(Visibility)(0),                     // 0: memos.api.v1.Visibility
 	(MemoRelation_Type)(0),              // 1: memos.api.v1.MemoRelation.Type
@@ -2240,38 +2402,41 @@ var file_api_v1_memo_service_proto_goTypes = []any{
 	(*ListMemoReactionsResponse)(nil),   // 24: memos.api.v1.ListMemoReactionsResponse
 	(*UpsertMemoReactionRequest)(nil),   // 25: memos.api.v1.UpsertMemoReactionRequest
 	(*DeleteMemoReactionRequest)(nil),   // 26: memos.api.v1.DeleteMemoReactionRequest
-	(*Memo_Property)(nil),               // 27: memos.api.v1.Memo.Property
-	(*MemoRelation_Memo)(nil),           // 28: memos.api.v1.MemoRelation.Memo
-	(*timestamppb.Timestamp)(nil),       // 29: google.protobuf.Timestamp
-	(State)(0),                          // 30: memos.api.v1.State
-	(*Node)(nil),                        // 31: memos.api.v1.Node
-	(*Attachment)(nil),                  // 32: memos.api.v1.Attachment
-	(*fieldmaskpb.FieldMask)(nil),       // 33: google.protobuf.FieldMask
-	(*emptypb.Empty)(nil),               // 34: google.protobuf.Empty
+	(*SuggestMemoTagsRequest)(nil),      // 27: memos.api.v1.SuggestMemoTagsRequest
+	(*TagSuggestion)(nil),               // 28: memos.api.v1.TagSuggestion
+	(*SuggestMemoTagsResponse)(nil),     // 29: memos.api.v1.SuggestMemoTagsResponse
+	(*Memo_Property)(nil),               // 30: memos.api.v1.Memo.Property
+	(*MemoRelation_Memo)(nil),           // 31: memos.api.v1.MemoRelation.Memo
+	(*timestamppb.Timestamp)(nil),       // 32: google.protobuf.Timestamp
+	(State)(0),                          // 33: memos.api.v1.State
+	(*Node)(nil),                        // 34: memos.api.v1.Node
+	(*Attachment)(nil),                  // 35: memos.api.v1.Attachment
+	(*fieldmaskpb.FieldMask)(nil),       // 36: google.protobuf.FieldMask
+	(*emptypb.Empty)(nil),               // 37: google.protobuf.Empty
 }
 var file_api_v1_memo_service_proto_depIdxs = []int32{
-	29, // 0: memos.api.v1.Reaction.create_time:type_name -> google.protobuf.Timestamp
-	30, // 1: memos.api.v1.Memo.state:type_name -> memos.api.v1.State
-	29, // 2: memos.api.v1.Memo.create_time:type_name -> google.protobuf.Timestamp
-	29, // 3: memos.api.v1.Memo.update_time:type_name -> google.protobuf.Timestamp
-	29, // 4: memos.api.v1.Memo.display_time:type_name -> google.protobuf.Timestamp
-	31, // 5: memos.api.v1.Memo.nodes:type_name -> memos.api.v1.Node
+	32, // 0: memos.api.v1.Reaction.create_time:type_name -> google.protobuf.Timestamp
+	33, // 1: memos.api.v1.Memo.state:type_name -> memos.api.v1.State
+	32, // 2: memos.api.v1.Memo.create_time:type_name -> google.protobuf.Timestamp
+	32, // 3: memos.api.v1.Memo.update_time:type_name -> google.protobuf.Timestamp
+	32, // 4: memos.api.v1.Memo.display_time:type_name -> google.protobuf.Timestamp
+	34, // 5: memos.api.v1.Memo.nodes:type_name -> memos.api.v1.Node
 	0,  // 6: memos.api.v1.Memo.visibility:type_name -> memos.api.v1.Visibility
-	32, // 7: memos.api.v1.Memo.attachments:type_name -> memos.api.v1.Attachment
+	35, // 7: memos.api.v1.Memo.attachments:type_name -> memos.api.v1.Attachment
 	16, // 8: memos.api.v1.Memo.relations:type_name -> memos.api.v1.MemoRelation
 	2,  // 9: memos.api.v1.Memo.reactions:type_name -> memos.api.v1.Reaction
-	27, // 10: memos.api.v1.Memo.property:type_name -> memos.api.v1.Memo.Property
+	30, // 10: memos.api.v1.Memo.property:type_name -> memos.api.v1.Memo.Property
 	4,  // 11: memos.api.v1.Memo.location:type_name -> memos.api.v1.Location
 	3,  // 12: memos.api.v1.CreateMemoRequest.memo:type_name -> memos.api.v1.Memo
-	30, // 13: memos.api.v1.ListMemosRequest.state:type_name -> memos.api.v1.State
+	33, // 13: memos.api.v1.ListMemosRequest.state:type_name -> memos.api.v1.State
 	3,  // 14: memos.api.v1.ListMemosResponse.memos:type_name -> memos.api.v1.Memo
-	33, // 15: memos.api.v1.GetMemoRequest.read_mask:type_name -> google.protobuf.FieldMask
+	36, // 15: memos.api.v1.GetMemoRequest.read_mask:type_name -> google.protobuf.FieldMask
 	3,  // 16: memos.api.v1.UpdateMemoRequest.memo:type_name -> memos.api.v1.Memo
-	33, // 17: memos.api.v1.UpdateMemoRequest.update_mask:type_name -> google.protobuf.FieldMask
-	32, // 18: memos.api.v1.SetMemoAttachmentsRequest.attachments:type_name -> memos.api.v1.Attachment
-	32, // 19: memos.api.v1.ListMemoAttachmentsResponse.attachments:type_name -> memos.api.v1.Attachment
-	28, // 20: memos.api.v1.MemoRelation.memo:type_name -> memos.api.v1.MemoRelation.Memo
-	28, // 21: memos.api.v1.MemoRelation.related_memo:type_name -> memos.api.v1.MemoRelation.Memo
+	36, // 17: memos.api.v1.UpdateMemoRequest.update_mask:type_name -> google.protobuf.FieldMask
+	35, // 18: memos.api.v1.SetMemoAttachmentsRequest.attachments:type_name -> memos.api.v1.Attachment
+	35, // 19: memos.api.v1.ListMemoAttachmentsResponse.attachments:type_name -> memos.api.v1.Attachment
+	31, // 20: memos.api.v1.MemoRelation.memo:type_name -> memos.api.v1.MemoRelation.Memo
+	31, // 21: memos.api.v1.MemoRelation.related_memo:type_name -> memos.api.v1.MemoRelation.Memo
 	1,  // 22: memos.api.v1.MemoRelation.type:type_name -> memos.api.v1.MemoRelation.Type
 	16, // 23: memos.api.v1.SetMemoRelationsRequest.relations:type_name -> memos.api.v1.MemoRelation
 	16, // 24: memos.api.v1.ListMemoRelationsResponse.relations:type_name -> memos.api.v1.MemoRelation
@@ -2279,43 +2444,46 @@ var file_api_v1_memo_service_proto_depIdxs = []int32{
 	3,  // 26: memos.api.v1.ListMemoCommentsResponse.memos:type_name -> memos.api.v1.Memo
 	2,  // 27: memos.api.v1.ListMemoReactionsResponse.reactions:type_name -> memos.api.v1.Reaction
 	2,  // 28: memos.api.v1.UpsertMemoReactionRequest.reaction:type_name -> memos.api.v1.Reaction
-	5,  // 29: memos.api.v1.MemoService.CreateMemo:input_type -> memos.api.v1.CreateMemoRequest
-	6,  // 30: memos.api.v1.MemoService.ListMemos:input_type -> memos.api.v1.ListMemosRequest
-	8,  // 31: memos.api.v1.MemoService.GetMemo:input_type -> memos.api.v1.GetMemoRequest
-	9,  // 32: memos.api.v1.MemoService.UpdateMemo:input_type -> memos.api.v1.UpdateMemoRequest
-	10, // 33: memos.api.v1.MemoService.DeleteMemo:input_type -> memos.api.v1.DeleteMemoRequest
-	11, // 34: memos.api.v1.MemoService.RenameMemoTag:input_type -> memos.api.v1.RenameMemoTagRequest
-	12, // 35: memos.api.v1.MemoService.DeleteMemoTag:input_type -> memos.api.v1.DeleteMemoTagRequest
-	13, // 36: memos.api.v1.MemoService.SetMemoAttachments:input_type -> memos.api.v1.SetMemoAttachmentsRequest
-	14, // 37: memos.api.v1.MemoService.ListMemoAttachments:input_type -> memos.api.v1.ListMemoAttachmentsRequest
-	17, // 38: memos.api.v1.MemoService.SetMemoRelations:input_type -> memos.api.v1.SetMemoRelationsRequest
-	18, // 39: memos.api.v1.MemoService.ListMemoRelations:input_type -> memos.api.v1.ListMemoRelationsRequest
-	20, // 40: memos.api.v1.MemoService.CreateMemoComment:input_type -> memos.api.v1.CreateMemoCommentRequest
-	21, // 41: memos.api.v1.MemoService.ListMemoComments:input_type -> memos.api.v1.ListMemoCommentsRequest
-	23, // 42: memos.api.v1.MemoService.ListMemoReactions:input_type -> memos.api.v1.ListMemoReactionsRequest
-	25, // 43: memos.api.v1.MemoService.UpsertMemoReaction:input_type -> memos.api.v1.UpsertMemoReactionRequest
-	26, // 44: memos.api.v1.MemoService.DeleteMemoReaction:input_type -> memos.api.v1.DeleteMemoReactionRequest
-	3,  // 45: memos.api.v1.MemoService.CreateMemo:output_type -> memos.api.v1.Memo
-	7,  // 46: memos.api.v1.MemoService.ListMemos:output_type -> memos.api.v1.ListMemosResponse
-	3,  // 47: memos.api.v1.MemoService.GetMemo:output_type -> memos.api.v1.Memo
-	3,  // 48: memos.api.v1.MemoService.UpdateMemo:output_type -> memos.api.v1.Memo
-	34, // 49: memos.api.v1.MemoService.DeleteMemo:output_type -> google.protobuf.Empty
-	34, // 50: memos.api.v1.MemoService.RenameMemoTag:output_type -> google.protobuf.Empty
-	34, // 51: memos.api.v1.MemoService.DeleteMemoTag:output_type -> google.protobuf.Empty
-	34, // 52: memos.api.v1.MemoService.SetMemoAttachments:output_type -> google.protobuf.Empty
-	15, // 53: memos.api.v1.MemoService.ListMemoAttachments:output_type -> memos.api.v1.ListMemoAttachmentsResponse
-	34, // 54: memos.api.v1.MemoService.SetMemoRelations:output_type -> google.protobuf.Empty
-	19, // 55: memos.api.v1.MemoService.ListMemoRelations:output_type -> memos.api.v1.ListMemoRelationsResponse
-	3,  // 56: memos.api.v1.MemoService.CreateMemoComment:output_type -> memos.api.v1.Memo
-	22, // 57: memos.api.v1.MemoService.ListMemoComments:output_type -> memos.api.v1.ListMemoCommentsResponse
-	24, // 58: memos.api.v1.MemoService.ListMemoReactions:output_type -> memos.api.v1.ListMemoReactionsResponse
-	2,  // 59: memos.api.v1.MemoService.UpsertMemoReaction:output_type -> memos.api.v1.Reaction
-	34, // 60: memos.api.v1.MemoService.DeleteMemoReaction:output_type -> google.protobuf.Empty
-	45, // [45:61] is the sub-list for method output_type
-	29, // [29:45] is the sub-list for method input_type
-	29, // [29:29] is the sub-list for extension type_name
-	29, // [29:29] is the sub-list for extension extendee
-	0,  // [0:29] is the sub-list for field type_name
+	28, // 29: memos.api.v1.SuggestMemoTagsResponse.suggested_tags:type_name -> memos.api.v1.TagSuggestion
+	5,  // 30: memos.api.v1.MemoService.CreateMemo:input_type -> memos.api.v1.CreateMemoRequest
+	6,  // 31: memos.api.v1.MemoService.ListMemos:input_type -> memos.api.v1.ListMemosRequest
+	8,  // 32: memos.api.v1.MemoService.GetMemo:input_type -> memos.api.v1.GetMemoRequest
+	9,  // 33: memos.api.v1.MemoService.UpdateMemo:input_type -> memos.api.v1.UpdateMemoRequest
+	10, // 34: memos.api.v1.MemoService.DeleteMemo:input_type -> memos.api.v1.DeleteMemoRequest
+	11, // 35: memos.api.v1.MemoService.RenameMemoTag:input_type -> memos.api.v1.RenameMemoTagRequest
+	12, // 36: memos.api.v1.MemoService.DeleteMemoTag:input_type -> memos.api.v1.DeleteMemoTagRequest
+	13, // 37: memos.api.v1.MemoService.SetMemoAttachments:input_type -> memos.api.v1.SetMemoAttachmentsRequest
+	14, // 38: memos.api.v1.MemoService.ListMemoAttachments:input_type -> memos.api.v1.ListMemoAttachmentsRequest
+	17, // 39: memos.api.v1.MemoService.SetMemoRelations:input_type -> memos.api.v1.SetMemoRelationsRequest
+	18, // 40: memos.api.v1.MemoService.ListMemoRelations:input_type -> memos.api.v1.ListMemoRelationsRequest
+	20, // 41: memos.api.v1.MemoService.CreateMemoComment:input_type -> memos.api.v1.CreateMemoCommentRequest
+	21, // 42: memos.api.v1.MemoService.ListMemoComments:input_type -> memos.api.v1.ListMemoCommentsRequest
+	23, // 43: memos.api.v1.MemoService.ListMemoReactions:input_type -> memos.api.v1.ListMemoReactionsRequest
+	25, // 44: memos.api.v1.MemoService.UpsertMemoReaction:input_type -> memos.api.v1.UpsertMemoReactionRequest
+	26, // 45: memos.api.v1.MemoService.DeleteMemoReaction:input_type -> memos.api.v1.DeleteMemoReactionRequest
+	27, // 46: memos.api.v1.MemoService.SuggestMemoTags:input_type -> memos.api.v1.SuggestMemoTagsRequest
+	3,  // 47: memos.api.v1.MemoService.CreateMemo:output_type -> memos.api.v1.Memo
+	7,  // 48: memos.api.v1.MemoService.ListMemos:output_type -> memos.api.v1.ListMemosResponse
+	3,  // 49: memos.api.v1.MemoService.GetMemo:output_type -> memos.api.v1.Memo
+	3,  // 50: memos.api.v1.MemoService.UpdateMemo:output_type -> memos.api.v1.Memo
+	37, // 51: memos.api.v1.MemoService.DeleteMemo:output_type -> google.protobuf.Empty
+	37, // 52: memos.api.v1.MemoService.RenameMemoTag:output_type -> google.protobuf.Empty
+	37, // 53: memos.api.v1.MemoService.DeleteMemoTag:output_type -> google.protobuf.Empty
+	37, // 54: memos.api.v1.MemoService.SetMemoAttachments:output_type -> google.protobuf.Empty
+	15, // 55: memos.api.v1.MemoService.ListMemoAttachments:output_type -> memos.api.v1.ListMemoAttachmentsResponse
+	37, // 56: memos.api.v1.MemoService.SetMemoRelations:output_type -> google.protobuf.Empty
+	19, // 57: memos.api.v1.MemoService.ListMemoRelations:output_type -> memos.api.v1.ListMemoRelationsResponse
+	3,  // 58: memos.api.v1.MemoService.CreateMemoComment:output_type -> memos.api.v1.Memo
+	22, // 59: memos.api.v1.MemoService.ListMemoComments:output_type -> memos.api.v1.ListMemoCommentsResponse
+	24, // 60: memos.api.v1.MemoService.ListMemoReactions:output_type -> memos.api.v1.ListMemoReactionsResponse
+	2,  // 61: memos.api.v1.MemoService.UpsertMemoReaction:output_type -> memos.api.v1.Reaction
+	37, // 62: memos.api.v1.MemoService.DeleteMemoReaction:output_type -> google.protobuf.Empty
+	29, // 63: memos.api.v1.MemoService.SuggestMemoTags:output_type -> memos.api.v1.SuggestMemoTagsResponse
+	47, // [47:64] is the sub-list for method output_type
+	30, // [30:47] is the sub-list for method input_type
+	30, // [30:30] is the sub-list for extension type_name
+	30, // [30:30] is the sub-list for extension extendee
+	0,  // [0:30] is the sub-list for field type_name
 }
 
 func init() { file_api_v1_memo_service_proto_init() }
@@ -2333,7 +2501,7 @@ func file_api_v1_memo_service_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: unsafe.Slice(unsafe.StringData(file_api_v1_memo_service_proto_rawDesc), len(file_api_v1_memo_service_proto_rawDesc)),
 			NumEnums:      2,
-			NumMessages:   27,
+			NumMessages:   30,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
diff --git a/proto/gen/api/v1/memo_service.pb.gw.go b/proto/gen/api/v1/memo_service.pb.gw.go
index a749fb41c..4bb4bc63b 100644
--- a/proto/gen/api/v1/memo_service.pb.gw.go
+++ b/proto/gen/api/v1/memo_service.pb.gw.go
@@ -833,6 +833,33 @@ func local_request_MemoService_DeleteMemoReaction_0(ctx context.Context, marshal
 	return msg, metadata, err
 }
 
+func request_MemoService_SuggestMemoTags_0(ctx context.Context, marshaler runtime.Marshaler, client MemoServiceClient, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var (
+		protoReq SuggestMemoTagsRequest
+		metadata runtime.ServerMetadata
+	)
+	if err := marshaler.NewDecoder(req.Body).Decode(&protoReq); err != nil && !errors.Is(err, io.EOF) {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+	if req.Body != nil {
+		_, _ = io.Copy(io.Discard, req.Body)
+	}
+	msg, err := client.SuggestMemoTags(ctx, &protoReq, grpc.Header(&metadata.HeaderMD), grpc.Trailer(&metadata.TrailerMD))
+	return msg, metadata, err
+}
+
+func local_request_MemoService_SuggestMemoTags_0(ctx context.Context, marshaler runtime.Marshaler, server MemoServiceServer, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var (
+		protoReq SuggestMemoTagsRequest
+		metadata runtime.ServerMetadata
+	)
+	if err := marshaler.NewDecoder(req.Body).Decode(&protoReq); err != nil && !errors.Is(err, io.EOF) {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+	msg, err := server.SuggestMemoTags(ctx, &protoReq)
+	return msg, metadata, err
+}
+
 // RegisterMemoServiceHandlerServer registers the http handlers for service MemoService to "mux".
 // UnaryRPC     :call MemoServiceServer directly.
 // StreamingRPC :currently unsupported pending https://github.com/grpc/grpc-go/issues/906.
@@ -1159,6 +1186,26 @@ func RegisterMemoServiceHandlerServer(ctx context.Context, mux *runtime.ServeMux
 		}
 		forward_MemoService_DeleteMemoReaction_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
 	})
+	mux.Handle(http.MethodPost, pattern_MemoService_SuggestMemoTags_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		var stream runtime.ServerTransportStream
+		ctx = grpc.NewContextWithServerTransportStream(ctx, &stream)
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		annotatedContext, err := runtime.AnnotateIncomingContext(ctx, mux, req, "/memos.api.v1.MemoService/SuggestMemoTags", runtime.WithHTTPPathPattern("/api/v1/memos:suggest-tags"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := local_request_MemoService_SuggestMemoTags_0(annotatedContext, inboundMarshaler, server, req, pathParams)
+		md.HeaderMD, md.TrailerMD = metadata.Join(md.HeaderMD, stream.Header()), metadata.Join(md.TrailerMD, stream.Trailer())
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		forward_MemoService_SuggestMemoTags_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+	})
 
 	return nil
 }
@@ -1471,6 +1518,23 @@ func RegisterMemoServiceHandlerClient(ctx context.Context, mux *runtime.ServeMux
 		}
 		forward_MemoService_DeleteMemoReaction_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
 	})
+	mux.Handle(http.MethodPost, pattern_MemoService_SuggestMemoTags_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		annotatedContext, err := runtime.AnnotateContext(ctx, mux, req, "/memos.api.v1.MemoService/SuggestMemoTags", runtime.WithHTTPPathPattern("/api/v1/memos:suggest-tags"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := request_MemoService_SuggestMemoTags_0(annotatedContext, inboundMarshaler, client, req, pathParams)
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		forward_MemoService_SuggestMemoTags_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+	})
 	return nil
 }
 
@@ -1491,6 +1555,7 @@ var (
 	pattern_MemoService_ListMemoReactions_0   = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 2, 5, 3, 2, 4}, []string{"api", "v1", "memos", "name", "reactions"}, ""))
 	pattern_MemoService_UpsertMemoReaction_0  = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 2, 5, 3, 2, 4}, []string{"api", "v1", "memos", "name", "reactions"}, ""))
 	pattern_MemoService_DeleteMemoReaction_0  = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 2, 5, 3}, []string{"api", "v1", "reactions", "name"}, ""))
+	pattern_MemoService_SuggestMemoTags_0     = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"api", "v1", "memos"}, "suggest-tags"))
 )
 
 var (
@@ -1510,4 +1575,5 @@ var (
 	forward_MemoService_ListMemoReactions_0   = runtime.ForwardResponseMessage
 	forward_MemoService_UpsertMemoReaction_0  = runtime.ForwardResponseMessage
 	forward_MemoService_DeleteMemoReaction_0  = runtime.ForwardResponseMessage
+	forward_MemoService_SuggestMemoTags_0     = runtime.ForwardResponseMessage
 )
diff --git a/proto/gen/api/v1/memo_service_grpc.pb.go b/proto/gen/api/v1/memo_service_grpc.pb.go
index 83e8a2fc6..85407fa7d 100644
--- a/proto/gen/api/v1/memo_service_grpc.pb.go
+++ b/proto/gen/api/v1/memo_service_grpc.pb.go
@@ -36,6 +36,7 @@ const (
 	MemoService_ListMemoReactions_FullMethodName   = "/memos.api.v1.MemoService/ListMemoReactions"
 	MemoService_UpsertMemoReaction_FullMethodName  = "/memos.api.v1.MemoService/UpsertMemoReaction"
 	MemoService_DeleteMemoReaction_FullMethodName  = "/memos.api.v1.MemoService/DeleteMemoReaction"
+	MemoService_SuggestMemoTags_FullMethodName     = "/memos.api.v1.MemoService/SuggestMemoTags"
 )
 
 // MemoServiceClient is the client API for MemoService service.
@@ -74,6 +75,8 @@ type MemoServiceClient interface {
 	UpsertMemoReaction(ctx context.Context, in *UpsertMemoReactionRequest, opts ...grpc.CallOption) (*Reaction, error)
 	// DeleteMemoReaction deletes a reaction for a memo.
 	DeleteMemoReaction(ctx context.Context, in *DeleteMemoReactionRequest, opts ...grpc.CallOption) (*emptypb.Empty, error)
+	// SuggestMemoTags suggests tags for memo content.
+	SuggestMemoTags(ctx context.Context, in *SuggestMemoTagsRequest, opts ...grpc.CallOption) (*SuggestMemoTagsResponse, error)
 }
 
 type memoServiceClient struct {
@@ -244,6 +247,16 @@ func (c *memoServiceClient) DeleteMemoReaction(ctx context.Context, in *DeleteMe
 	return out, nil
 }
 
+func (c *memoServiceClient) SuggestMemoTags(ctx context.Context, in *SuggestMemoTagsRequest, opts ...grpc.CallOption) (*SuggestMemoTagsResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(SuggestMemoTagsResponse)
+	err := c.cc.Invoke(ctx, MemoService_SuggestMemoTags_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // MemoServiceServer is the server API for MemoService service.
 // All implementations must embed UnimplementedMemoServiceServer
 // for forward compatibility.
@@ -280,6 +293,8 @@ type MemoServiceServer interface {
 	UpsertMemoReaction(context.Context, *UpsertMemoReactionRequest) (*Reaction, error)
 	// DeleteMemoReaction deletes a reaction for a memo.
 	DeleteMemoReaction(context.Context, *DeleteMemoReactionRequest) (*emptypb.Empty, error)
+	// SuggestMemoTags suggests tags for memo content.
+	SuggestMemoTags(context.Context, *SuggestMemoTagsRequest) (*SuggestMemoTagsResponse, error)
 	mustEmbedUnimplementedMemoServiceServer()
 }
 
@@ -338,6 +353,9 @@ func (UnimplementedMemoServiceServer) UpsertMemoReaction(context.Context, *Upser
 func (UnimplementedMemoServiceServer) DeleteMemoReaction(context.Context, *DeleteMemoReactionRequest) (*emptypb.Empty, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method DeleteMemoReaction not implemented")
 }
+func (UnimplementedMemoServiceServer) SuggestMemoTags(context.Context, *SuggestMemoTagsRequest) (*SuggestMemoTagsResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method SuggestMemoTags not implemented")
+}
 func (UnimplementedMemoServiceServer) mustEmbedUnimplementedMemoServiceServer() {}
 func (UnimplementedMemoServiceServer) testEmbeddedByValue()                     {}
 
@@ -647,6 +665,24 @@ func _MemoService_DeleteMemoReaction_Handler(srv interface{}, ctx context.Contex
 	return interceptor(ctx, in, info, handler)
 }
 
+func _MemoService_SuggestMemoTags_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(SuggestMemoTagsRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(MemoServiceServer).SuggestMemoTags(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: MemoService_SuggestMemoTags_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(MemoServiceServer).SuggestMemoTags(ctx, req.(*SuggestMemoTagsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 // MemoService_ServiceDesc is the grpc.ServiceDesc for MemoService service.
 // It's only intended for direct use with grpc.RegisterService,
 // and not to be introspected or modified (even as a copy)
@@ -718,6 +754,10 @@ var MemoService_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "DeleteMemoReaction",
 			Handler:    _MemoService_DeleteMemoReaction_Handler,
 		},
+		{
+			MethodName: "SuggestMemoTags",
+			Handler:    _MemoService_SuggestMemoTags_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "api/v1/memo_service.proto",
diff --git a/proto/gen/api/v1/workspace_service.pb.go b/proto/gen/api/v1/workspace_service.pb.go
index 9c9f9a896..ba381ff34 100644
--- a/proto/gen/api/v1/workspace_service.pb.go
+++ b/proto/gen/api/v1/workspace_service.pb.go
@@ -477,6 +477,226 @@ func (x *UpdateWorkspaceSettingRequest) GetUpdateMask() *fieldmaskpb.FieldMask {
 	return nil
 }
 
+// Request message for GetDefaultTagRecommendationPrompt method.
+type GetDefaultTagRecommendationPromptRequest struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *GetDefaultTagRecommendationPromptRequest) Reset() {
+	*x = GetDefaultTagRecommendationPromptRequest{}
+	mi := &file_api_v1_workspace_service_proto_msgTypes[5]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *GetDefaultTagRecommendationPromptRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetDefaultTagRecommendationPromptRequest) ProtoMessage() {}
+
+func (x *GetDefaultTagRecommendationPromptRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_api_v1_workspace_service_proto_msgTypes[5]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use GetDefaultTagRecommendationPromptRequest.ProtoReflect.Descriptor instead.
+func (*GetDefaultTagRecommendationPromptRequest) Descriptor() ([]byte, []int) {
+	return file_api_v1_workspace_service_proto_rawDescGZIP(), []int{5}
+}
+
+// Response message for GetDefaultTagRecommendationPrompt method.
+type GetDefaultTagRecommendationPromptResponse struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// The default system prompt for tag recommendation.
+	SystemPrompt  string `protobuf:"bytes,1,opt,name=system_prompt,json=systemPrompt,proto3" json:"system_prompt,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *GetDefaultTagRecommendationPromptResponse) Reset() {
+	*x = GetDefaultTagRecommendationPromptResponse{}
+	mi := &file_api_v1_workspace_service_proto_msgTypes[6]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *GetDefaultTagRecommendationPromptResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetDefaultTagRecommendationPromptResponse) ProtoMessage() {}
+
+func (x *GetDefaultTagRecommendationPromptResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_api_v1_workspace_service_proto_msgTypes[6]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use GetDefaultTagRecommendationPromptResponse.ProtoReflect.Descriptor instead.
+func (*GetDefaultTagRecommendationPromptResponse) Descriptor() ([]byte, []int) {
+	return file_api_v1_workspace_service_proto_rawDescGZIP(), []int{6}
+}
+
+func (x *GetDefaultTagRecommendationPromptResponse) GetSystemPrompt() string {
+	if x != nil {
+		return x.SystemPrompt
+	}
+	return ""
+}
+
+// Request message for TestAiConnection method.
+type TestAiConnectionRequest struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// base_url is the base URL for AI API.
+	BaseUrl string `protobuf:"bytes,1,opt,name=base_url,json=baseUrl,proto3" json:"base_url,omitempty"`
+	// api_key is the API key for AI service.
+	ApiKey string `protobuf:"bytes,2,opt,name=api_key,json=apiKey,proto3" json:"api_key,omitempty"`
+	// model is the AI model to use.
+	Model string `protobuf:"bytes,3,opt,name=model,proto3" json:"model,omitempty"`
+	// timeout_seconds is the timeout for AI requests in seconds.
+	TimeoutSeconds int32 `protobuf:"varint,4,opt,name=timeout_seconds,json=timeoutSeconds,proto3" json:"timeout_seconds,omitempty"`
+	unknownFields  protoimpl.UnknownFields
+	sizeCache      protoimpl.SizeCache
+}
+
+func (x *TestAiConnectionRequest) Reset() {
+	*x = TestAiConnectionRequest{}
+	mi := &file_api_v1_workspace_service_proto_msgTypes[7]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *TestAiConnectionRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*TestAiConnectionRequest) ProtoMessage() {}
+
+func (x *TestAiConnectionRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_api_v1_workspace_service_proto_msgTypes[7]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use TestAiConnectionRequest.ProtoReflect.Descriptor instead.
+func (*TestAiConnectionRequest) Descriptor() ([]byte, []int) {
+	return file_api_v1_workspace_service_proto_rawDescGZIP(), []int{7}
+}
+
+func (x *TestAiConnectionRequest) GetBaseUrl() string {
+	if x != nil {
+		return x.BaseUrl
+	}
+	return ""
+}
+
+func (x *TestAiConnectionRequest) GetApiKey() string {
+	if x != nil {
+		return x.ApiKey
+	}
+	return ""
+}
+
+func (x *TestAiConnectionRequest) GetModel() string {
+	if x != nil {
+		return x.Model
+	}
+	return ""
+}
+
+func (x *TestAiConnectionRequest) GetTimeoutSeconds() int32 {
+	if x != nil {
+		return x.TimeoutSeconds
+	}
+	return 0
+}
+
+// Response message for TestAiConnection method.
+type TestAiConnectionResponse struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// success indicates whether the connection test was successful.
+	Success bool `protobuf:"varint,1,opt,name=success,proto3" json:"success,omitempty"`
+	// message provides additional information about the test result.
+	Message string `protobuf:"bytes,2,opt,name=message,proto3" json:"message,omitempty"`
+	// model_info contains information about the tested model (if successful).
+	ModelInfo     string `protobuf:"bytes,3,opt,name=model_info,json=modelInfo,proto3" json:"model_info,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *TestAiConnectionResponse) Reset() {
+	*x = TestAiConnectionResponse{}
+	mi := &file_api_v1_workspace_service_proto_msgTypes[8]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *TestAiConnectionResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*TestAiConnectionResponse) ProtoMessage() {}
+
+func (x *TestAiConnectionResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_api_v1_workspace_service_proto_msgTypes[8]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use TestAiConnectionResponse.ProtoReflect.Descriptor instead.
+func (*TestAiConnectionResponse) Descriptor() ([]byte, []int) {
+	return file_api_v1_workspace_service_proto_rawDescGZIP(), []int{8}
+}
+
+func (x *TestAiConnectionResponse) GetSuccess() bool {
+	if x != nil {
+		return x.Success
+	}
+	return false
+}
+
+func (x *TestAiConnectionResponse) GetMessage() string {
+	if x != nil {
+		return x.Message
+	}
+	return ""
+}
+
+func (x *TestAiConnectionResponse) GetModelInfo() string {
+	if x != nil {
+		return x.ModelInfo
+	}
+	return ""
+}
+
 // General workspace settings configuration.
 type WorkspaceSetting_GeneralSetting struct {
 	state protoimpl.MessageState `protogen:"open.v1"`
@@ -507,7 +727,7 @@ type WorkspaceSetting_GeneralSetting struct {
 
 func (x *WorkspaceSetting_GeneralSetting) Reset() {
 	*x = WorkspaceSetting_GeneralSetting{}
-	mi := &file_api_v1_workspace_service_proto_msgTypes[5]
+	mi := &file_api_v1_workspace_service_proto_msgTypes[9]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -519,7 +739,7 @@ func (x *WorkspaceSetting_GeneralSetting) String() string {
 func (*WorkspaceSetting_GeneralSetting) ProtoMessage() {}
 
 func (x *WorkspaceSetting_GeneralSetting) ProtoReflect() protoreflect.Message {
-	mi := &file_api_v1_workspace_service_proto_msgTypes[5]
+	mi := &file_api_v1_workspace_service_proto_msgTypes[9]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -616,7 +836,7 @@ type WorkspaceSetting_StorageSetting struct {
 
 func (x *WorkspaceSetting_StorageSetting) Reset() {
 	*x = WorkspaceSetting_StorageSetting{}
-	mi := &file_api_v1_workspace_service_proto_msgTypes[6]
+	mi := &file_api_v1_workspace_service_proto_msgTypes[10]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -628,7 +848,7 @@ func (x *WorkspaceSetting_StorageSetting) String() string {
 func (*WorkspaceSetting_StorageSetting) ProtoMessage() {}
 
 func (x *WorkspaceSetting_StorageSetting) ProtoReflect() protoreflect.Message {
-	mi := &file_api_v1_workspace_service_proto_msgTypes[6]
+	mi := &file_api_v1_workspace_service_proto_msgTypes[10]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -699,7 +919,7 @@ type WorkspaceSetting_MemoRelatedSetting struct {
 
 func (x *WorkspaceSetting_MemoRelatedSetting) Reset() {
 	*x = WorkspaceSetting_MemoRelatedSetting{}
-	mi := &file_api_v1_workspace_service_proto_msgTypes[7]
+	mi := &file_api_v1_workspace_service_proto_msgTypes[11]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -711,7 +931,7 @@ func (x *WorkspaceSetting_MemoRelatedSetting) String() string {
 func (*WorkspaceSetting_MemoRelatedSetting) ProtoMessage() {}
 
 func (x *WorkspaceSetting_MemoRelatedSetting) ProtoReflect() protoreflect.Message {
-	mi := &file_api_v1_workspace_service_proto_msgTypes[7]
+	mi := &file_api_v1_workspace_service_proto_msgTypes[11]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -803,13 +1023,15 @@ type WorkspaceSetting_AiSetting struct {
 	Model string `protobuf:"bytes,4,opt,name=model,proto3" json:"model,omitempty"`
 	// timeout_seconds is the timeout for AI requests in seconds.
 	TimeoutSeconds int32 `protobuf:"varint,5,opt,name=timeout_seconds,json=timeoutSeconds,proto3" json:"timeout_seconds,omitempty"`
-	unknownFields  protoimpl.UnknownFields
-	sizeCache      protoimpl.SizeCache
+	// tag_recommendation contains tag recommendation specific settings.
+	TagRecommendation *WorkspaceSetting_TagRecommendationConfig `protobuf:"bytes,6,opt,name=tag_recommendation,json=tagRecommendation,proto3" json:"tag_recommendation,omitempty"`
+	unknownFields     protoimpl.UnknownFields
+	sizeCache         protoimpl.SizeCache
 }
 
 func (x *WorkspaceSetting_AiSetting) Reset() {
 	*x = WorkspaceSetting_AiSetting{}
-	mi := &file_api_v1_workspace_service_proto_msgTypes[8]
+	mi := &file_api_v1_workspace_service_proto_msgTypes[12]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -821,7 +1043,7 @@ func (x *WorkspaceSetting_AiSetting) String() string {
 func (*WorkspaceSetting_AiSetting) ProtoMessage() {}
 
 func (x *WorkspaceSetting_AiSetting) ProtoReflect() protoreflect.Message {
-	mi := &file_api_v1_workspace_service_proto_msgTypes[8]
+	mi := &file_api_v1_workspace_service_proto_msgTypes[12]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -872,6 +1094,77 @@ func (x *WorkspaceSetting_AiSetting) GetTimeoutSeconds() int32 {
 	return 0
 }
 
+func (x *WorkspaceSetting_AiSetting) GetTagRecommendation() *WorkspaceSetting_TagRecommendationConfig {
+	if x != nil {
+		return x.TagRecommendation
+	}
+	return nil
+}
+
+// Tag recommendation configuration.
+type WorkspaceSetting_TagRecommendationConfig struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// enabled controls whether tag recommendation is enabled.
+	Enabled bool `protobuf:"varint,1,opt,name=enabled,proto3" json:"enabled,omitempty"`
+	// system_prompt is the custom system prompt for tag recommendation.
+	SystemPrompt string `protobuf:"bytes,2,opt,name=system_prompt,json=systemPrompt,proto3" json:"system_prompt,omitempty"`
+	// requests_per_minute is the rate limit for tag recommendation requests.
+	RequestsPerMinute int32 `protobuf:"varint,3,opt,name=requests_per_minute,json=requestsPerMinute,proto3" json:"requests_per_minute,omitempty"`
+	unknownFields     protoimpl.UnknownFields
+	sizeCache         protoimpl.SizeCache
+}
+
+func (x *WorkspaceSetting_TagRecommendationConfig) Reset() {
+	*x = WorkspaceSetting_TagRecommendationConfig{}
+	mi := &file_api_v1_workspace_service_proto_msgTypes[13]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *WorkspaceSetting_TagRecommendationConfig) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*WorkspaceSetting_TagRecommendationConfig) ProtoMessage() {}
+
+func (x *WorkspaceSetting_TagRecommendationConfig) ProtoReflect() protoreflect.Message {
+	mi := &file_api_v1_workspace_service_proto_msgTypes[13]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use WorkspaceSetting_TagRecommendationConfig.ProtoReflect.Descriptor instead.
+func (*WorkspaceSetting_TagRecommendationConfig) Descriptor() ([]byte, []int) {
+	return file_api_v1_workspace_service_proto_rawDescGZIP(), []int{2, 4}
+}
+
+func (x *WorkspaceSetting_TagRecommendationConfig) GetEnabled() bool {
+	if x != nil {
+		return x.Enabled
+	}
+	return false
+}
+
+func (x *WorkspaceSetting_TagRecommendationConfig) GetSystemPrompt() string {
+	if x != nil {
+		return x.SystemPrompt
+	}
+	return ""
+}
+
+func (x *WorkspaceSetting_TagRecommendationConfig) GetRequestsPerMinute() int32 {
+	if x != nil {
+		return x.RequestsPerMinute
+	}
+	return 0
+}
+
 // Custom profile configuration for workspace branding.
 type WorkspaceSetting_GeneralSetting_CustomProfile struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
@@ -885,7 +1178,7 @@ type WorkspaceSetting_GeneralSetting_CustomProfile struct {
 
 func (x *WorkspaceSetting_GeneralSetting_CustomProfile) Reset() {
 	*x = WorkspaceSetting_GeneralSetting_CustomProfile{}
-	mi := &file_api_v1_workspace_service_proto_msgTypes[9]
+	mi := &file_api_v1_workspace_service_proto_msgTypes[14]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -897,7 +1190,7 @@ func (x *WorkspaceSetting_GeneralSetting_CustomProfile) String() string {
 func (*WorkspaceSetting_GeneralSetting_CustomProfile) ProtoMessage() {}
 
 func (x *WorkspaceSetting_GeneralSetting_CustomProfile) ProtoReflect() protoreflect.Message {
-	mi := &file_api_v1_workspace_service_proto_msgTypes[9]
+	mi := &file_api_v1_workspace_service_proto_msgTypes[14]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -957,7 +1250,7 @@ type WorkspaceSetting_StorageSetting_S3Config struct {
 
 func (x *WorkspaceSetting_StorageSetting_S3Config) Reset() {
 	*x = WorkspaceSetting_StorageSetting_S3Config{}
-	mi := &file_api_v1_workspace_service_proto_msgTypes[10]
+	mi := &file_api_v1_workspace_service_proto_msgTypes[15]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -969,7 +1262,7 @@ func (x *WorkspaceSetting_StorageSetting_S3Config) String() string {
 func (*WorkspaceSetting_StorageSetting_S3Config) ProtoMessage() {}
 
 func (x *WorkspaceSetting_StorageSetting_S3Config) ProtoReflect() protoreflect.Message {
-	mi := &file_api_v1_workspace_service_proto_msgTypes[10]
+	mi := &file_api_v1_workspace_service_proto_msgTypes[15]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1037,7 +1330,7 @@ const file_api_v1_workspace_service_proto_rawDesc = "" +
 	"\aversion\x18\x02 \x01(\tR\aversion\x12\x12\n" +
 	"\x04mode\x18\x03 \x01(\tR\x04mode\x12!\n" +
 	"\finstance_url\x18\x06 \x01(\tR\vinstanceUrl\"\x1c\n" +
-	"\x1aGetWorkspaceProfileRequest\"\x88\x13\n" +
+	"\x1aGetWorkspaceProfileRequest\"\xfa\x14\n" +
 	"\x10WorkspaceSetting\x12\x17\n" +
 	"\x04name\x18\x01 \x01(\tB\x03\xe0A\bR\x04name\x12X\n" +
 	"\x0fgeneral_setting\x18\x02 \x01(\v2-.memos.api.v1.WorkspaceSetting.GeneralSettingH\x00R\x0egeneralSetting\x12X\n" +
@@ -1087,13 +1380,18 @@ const file_api_v1_workspace_service_proto_rawDesc = "" +
 	"\x1adisable_markdown_shortcuts\x18\b \x01(\bR\x18disableMarkdownShortcuts\x127\n" +
 	"\x18enable_blur_nsfw_content\x18\t \x01(\bR\x15enableBlurNsfwContent\x12\x1b\n" +
 	"\tnsfw_tags\x18\n" +
-	" \x03(\tR\bnsfwTags\x1a\x9b\x01\n" +
+	" \x03(\tR\bnsfwTags\x1a\x82\x02\n" +
 	"\tAiSetting\x12\x1b\n" +
 	"\tenable_ai\x18\x01 \x01(\bR\benableAi\x12\x19\n" +
 	"\bbase_url\x18\x02 \x01(\tR\abaseUrl\x12\x17\n" +
 	"\aapi_key\x18\x03 \x01(\tR\x06apiKey\x12\x14\n" +
 	"\x05model\x18\x04 \x01(\tR\x05model\x12'\n" +
-	"\x0ftimeout_seconds\x18\x05 \x01(\x05R\x0etimeoutSeconds\"N\n" +
+	"\x0ftimeout_seconds\x18\x05 \x01(\x05R\x0etimeoutSeconds\x12e\n" +
+	"\x12tag_recommendation\x18\x06 \x01(\v26.memos.api.v1.WorkspaceSetting.TagRecommendationConfigR\x11tagRecommendation\x1a\x88\x01\n" +
+	"\x17TagRecommendationConfig\x12\x18\n" +
+	"\aenabled\x18\x01 \x01(\bR\aenabled\x12#\n" +
+	"\rsystem_prompt\x18\x02 \x01(\tR\fsystemPrompt\x12.\n" +
+	"\x13requests_per_minute\x18\x03 \x01(\x05R\x11requestsPerMinute\"N\n" +
 	"\x03Key\x12\x13\n" +
 	"\x0fKEY_UNSPECIFIED\x10\x00\x12\v\n" +
 	"\aGENERAL\x10\x01\x12\v\n" +
@@ -1108,11 +1406,26 @@ const file_api_v1_workspace_service_proto_rawDesc = "" +
 	"\x1dUpdateWorkspaceSettingRequest\x12=\n" +
 	"\asetting\x18\x01 \x01(\v2\x1e.memos.api.v1.WorkspaceSettingB\x03\xe0A\x02R\asetting\x12@\n" +
 	"\vupdate_mask\x18\x02 \x01(\v2\x1a.google.protobuf.FieldMaskB\x03\xe0A\x01R\n" +
-	"updateMask2\xe9\x03\n" +
+	"updateMask\"*\n" +
+	"(GetDefaultTagRecommendationPromptRequest\"P\n" +
+	")GetDefaultTagRecommendationPromptResponse\x12#\n" +
+	"\rsystem_prompt\x18\x01 \x01(\tR\fsystemPrompt\"\x8c\x01\n" +
+	"\x17TestAiConnectionRequest\x12\x19\n" +
+	"\bbase_url\x18\x01 \x01(\tR\abaseUrl\x12\x17\n" +
+	"\aapi_key\x18\x02 \x01(\tR\x06apiKey\x12\x14\n" +
+	"\x05model\x18\x03 \x01(\tR\x05model\x12'\n" +
+	"\x0ftimeout_seconds\x18\x04 \x01(\x05R\x0etimeoutSeconds\"m\n" +
+	"\x18TestAiConnectionResponse\x12\x18\n" +
+	"\asuccess\x18\x01 \x01(\bR\asuccess\x12\x18\n" +
+	"\amessage\x18\x02 \x01(\tR\amessage\x12\x1d\n" +
+	"\n" +
+	"model_info\x18\x03 \x01(\tR\tmodelInfo2\xd5\x06\n" +
 	"\x10WorkspaceService\x12\x82\x01\n" +
 	"\x13GetWorkspaceProfile\x12(.memos.api.v1.GetWorkspaceProfileRequest\x1a\x1e.memos.api.v1.WorkspaceProfile\"!\x82\xd3\xe4\x93\x02\x1b\x12\x19/api/v1/workspace/profile\x12\x93\x01\n" +
 	"\x13GetWorkspaceSetting\x12(.memos.api.v1.GetWorkspaceSettingRequest\x1a\x1e.memos.api.v1.WorkspaceSetting\"2\xdaA\x04name\x82\xd3\xe4\x93\x02%\x12#/api/v1/{name=workspace/settings/*}\x12\xb9\x01\n" +
-	"\x16UpdateWorkspaceSetting\x12+.memos.api.v1.UpdateWorkspaceSettingRequest\x1a\x1e.memos.api.v1.WorkspaceSetting\"R\xdaA\x13setting,update_mask\x82\xd3\xe4\x93\x026:\asetting2+/api/v1/{setting.name=workspace/settings/*}B\xad\x01\n" +
+	"\x16UpdateWorkspaceSetting\x12+.memos.api.v1.UpdateWorkspaceSettingRequest\x1a\x1e.memos.api.v1.WorkspaceSetting\"R\xdaA\x13setting,update_mask\x82\xd3\xe4\x93\x026:\asetting2+/api/v1/{setting.name=workspace/settings/*}\x12\xd4\x01\n" +
+	"!GetDefaultTagRecommendationPrompt\x126.memos.api.v1.GetDefaultTagRecommendationPromptRequest\x1a7.memos.api.v1.GetDefaultTagRecommendationPromptResponse\">\x82\xd3\xe4\x93\x028\x126/api/v1/workspace/ai/tag-recommendation/default-prompt\x12\x92\x01\n" +
+	"\x10TestAiConnection\x12%.memos.api.v1.TestAiConnectionRequest\x1a&.memos.api.v1.TestAiConnectionResponse\"/\x82\xd3\xe4\x93\x02):\x01*\"$/api/v1/workspace/ai/test-connectionB\xad\x01\n" +
 	"\x10com.memos.api.v1B\x15WorkspaceServiceProtoP\x01Z0github.com/usememos/memos/proto/gen/api/v1;apiv1\xa2\x02\x03MAX\xaa\x02\fMemos.Api.V1\xca\x02\fMemos\\Api\\V1\xe2\x02\x18Memos\\Api\\V1\\GPBMetadata\xea\x02\x0eMemos::Api::V1b\x06proto3"
 
 var (
@@ -1128,7 +1441,7 @@ func file_api_v1_workspace_service_proto_rawDescGZIP() []byte {
 }
 
 var file_api_v1_workspace_service_proto_enumTypes = make([]protoimpl.EnumInfo, 2)
-var file_api_v1_workspace_service_proto_msgTypes = make([]protoimpl.MessageInfo, 11)
+var file_api_v1_workspace_service_proto_msgTypes = make([]protoimpl.MessageInfo, 16)
 var file_api_v1_workspace_service_proto_goTypes = []any{
 	(WorkspaceSetting_Key)(0),                             // 0: memos.api.v1.WorkspaceSetting.Key
 	(WorkspaceSetting_StorageSetting_StorageType)(0),      // 1: memos.api.v1.WorkspaceSetting.StorageSetting.StorageType
@@ -1137,35 +1450,45 @@ var file_api_v1_workspace_service_proto_goTypes = []any{
 	(*WorkspaceSetting)(nil),                              // 4: memos.api.v1.WorkspaceSetting
 	(*GetWorkspaceSettingRequest)(nil),                    // 5: memos.api.v1.GetWorkspaceSettingRequest
 	(*UpdateWorkspaceSettingRequest)(nil),                 // 6: memos.api.v1.UpdateWorkspaceSettingRequest
-	(*WorkspaceSetting_GeneralSetting)(nil),               // 7: memos.api.v1.WorkspaceSetting.GeneralSetting
-	(*WorkspaceSetting_StorageSetting)(nil),               // 8: memos.api.v1.WorkspaceSetting.StorageSetting
-	(*WorkspaceSetting_MemoRelatedSetting)(nil),           // 9: memos.api.v1.WorkspaceSetting.MemoRelatedSetting
-	(*WorkspaceSetting_AiSetting)(nil),                    // 10: memos.api.v1.WorkspaceSetting.AiSetting
-	(*WorkspaceSetting_GeneralSetting_CustomProfile)(nil), // 11: memos.api.v1.WorkspaceSetting.GeneralSetting.CustomProfile
-	(*WorkspaceSetting_StorageSetting_S3Config)(nil),      // 12: memos.api.v1.WorkspaceSetting.StorageSetting.S3Config
-	(*fieldmaskpb.FieldMask)(nil),                         // 13: google.protobuf.FieldMask
+	(*GetDefaultTagRecommendationPromptRequest)(nil),      // 7: memos.api.v1.GetDefaultTagRecommendationPromptRequest
+	(*GetDefaultTagRecommendationPromptResponse)(nil),     // 8: memos.api.v1.GetDefaultTagRecommendationPromptResponse
+	(*TestAiConnectionRequest)(nil),                       // 9: memos.api.v1.TestAiConnectionRequest
+	(*TestAiConnectionResponse)(nil),                      // 10: memos.api.v1.TestAiConnectionResponse
+	(*WorkspaceSetting_GeneralSetting)(nil),               // 11: memos.api.v1.WorkspaceSetting.GeneralSetting
+	(*WorkspaceSetting_StorageSetting)(nil),               // 12: memos.api.v1.WorkspaceSetting.StorageSetting
+	(*WorkspaceSetting_MemoRelatedSetting)(nil),           // 13: memos.api.v1.WorkspaceSetting.MemoRelatedSetting
+	(*WorkspaceSetting_AiSetting)(nil),                    // 14: memos.api.v1.WorkspaceSetting.AiSetting
+	(*WorkspaceSetting_TagRecommendationConfig)(nil),      // 15: memos.api.v1.WorkspaceSetting.TagRecommendationConfig
+	(*WorkspaceSetting_GeneralSetting_CustomProfile)(nil), // 16: memos.api.v1.WorkspaceSetting.GeneralSetting.CustomProfile
+	(*WorkspaceSetting_StorageSetting_S3Config)(nil),      // 17: memos.api.v1.WorkspaceSetting.StorageSetting.S3Config
+	(*fieldmaskpb.FieldMask)(nil),                         // 18: google.protobuf.FieldMask
 }
 var file_api_v1_workspace_service_proto_depIdxs = []int32{
-	7,  // 0: memos.api.v1.WorkspaceSetting.general_setting:type_name -> memos.api.v1.WorkspaceSetting.GeneralSetting
-	8,  // 1: memos.api.v1.WorkspaceSetting.storage_setting:type_name -> memos.api.v1.WorkspaceSetting.StorageSetting
-	9,  // 2: memos.api.v1.WorkspaceSetting.memo_related_setting:type_name -> memos.api.v1.WorkspaceSetting.MemoRelatedSetting
-	10, // 3: memos.api.v1.WorkspaceSetting.ai_setting:type_name -> memos.api.v1.WorkspaceSetting.AiSetting
+	11, // 0: memos.api.v1.WorkspaceSetting.general_setting:type_name -> memos.api.v1.WorkspaceSetting.GeneralSetting
+	12, // 1: memos.api.v1.WorkspaceSetting.storage_setting:type_name -> memos.api.v1.WorkspaceSetting.StorageSetting
+	13, // 2: memos.api.v1.WorkspaceSetting.memo_related_setting:type_name -> memos.api.v1.WorkspaceSetting.MemoRelatedSetting
+	14, // 3: memos.api.v1.WorkspaceSetting.ai_setting:type_name -> memos.api.v1.WorkspaceSetting.AiSetting
 	4,  // 4: memos.api.v1.UpdateWorkspaceSettingRequest.setting:type_name -> memos.api.v1.WorkspaceSetting
-	13, // 5: memos.api.v1.UpdateWorkspaceSettingRequest.update_mask:type_name -> google.protobuf.FieldMask
-	11, // 6: memos.api.v1.WorkspaceSetting.GeneralSetting.custom_profile:type_name -> memos.api.v1.WorkspaceSetting.GeneralSetting.CustomProfile
+	18, // 5: memos.api.v1.UpdateWorkspaceSettingRequest.update_mask:type_name -> google.protobuf.FieldMask
+	16, // 6: memos.api.v1.WorkspaceSetting.GeneralSetting.custom_profile:type_name -> memos.api.v1.WorkspaceSetting.GeneralSetting.CustomProfile
 	1,  // 7: memos.api.v1.WorkspaceSetting.StorageSetting.storage_type:type_name -> memos.api.v1.WorkspaceSetting.StorageSetting.StorageType
-	12, // 8: memos.api.v1.WorkspaceSetting.StorageSetting.s3_config:type_name -> memos.api.v1.WorkspaceSetting.StorageSetting.S3Config
-	3,  // 9: memos.api.v1.WorkspaceService.GetWorkspaceProfile:input_type -> memos.api.v1.GetWorkspaceProfileRequest
-	5,  // 10: memos.api.v1.WorkspaceService.GetWorkspaceSetting:input_type -> memos.api.v1.GetWorkspaceSettingRequest
-	6,  // 11: memos.api.v1.WorkspaceService.UpdateWorkspaceSetting:input_type -> memos.api.v1.UpdateWorkspaceSettingRequest
-	2,  // 12: memos.api.v1.WorkspaceService.GetWorkspaceProfile:output_type -> memos.api.v1.WorkspaceProfile
-	4,  // 13: memos.api.v1.WorkspaceService.GetWorkspaceSetting:output_type -> memos.api.v1.WorkspaceSetting
-	4,  // 14: memos.api.v1.WorkspaceService.UpdateWorkspaceSetting:output_type -> memos.api.v1.WorkspaceSetting
-	12, // [12:15] is the sub-list for method output_type
-	9,  // [9:12] is the sub-list for method input_type
-	9,  // [9:9] is the sub-list for extension type_name
-	9,  // [9:9] is the sub-list for extension extendee
-	0,  // [0:9] is the sub-list for field type_name
+	17, // 8: memos.api.v1.WorkspaceSetting.StorageSetting.s3_config:type_name -> memos.api.v1.WorkspaceSetting.StorageSetting.S3Config
+	15, // 9: memos.api.v1.WorkspaceSetting.AiSetting.tag_recommendation:type_name -> memos.api.v1.WorkspaceSetting.TagRecommendationConfig
+	3,  // 10: memos.api.v1.WorkspaceService.GetWorkspaceProfile:input_type -> memos.api.v1.GetWorkspaceProfileRequest
+	5,  // 11: memos.api.v1.WorkspaceService.GetWorkspaceSetting:input_type -> memos.api.v1.GetWorkspaceSettingRequest
+	6,  // 12: memos.api.v1.WorkspaceService.UpdateWorkspaceSetting:input_type -> memos.api.v1.UpdateWorkspaceSettingRequest
+	7,  // 13: memos.api.v1.WorkspaceService.GetDefaultTagRecommendationPrompt:input_type -> memos.api.v1.GetDefaultTagRecommendationPromptRequest
+	9,  // 14: memos.api.v1.WorkspaceService.TestAiConnection:input_type -> memos.api.v1.TestAiConnectionRequest
+	2,  // 15: memos.api.v1.WorkspaceService.GetWorkspaceProfile:output_type -> memos.api.v1.WorkspaceProfile
+	4,  // 16: memos.api.v1.WorkspaceService.GetWorkspaceSetting:output_type -> memos.api.v1.WorkspaceSetting
+	4,  // 17: memos.api.v1.WorkspaceService.UpdateWorkspaceSetting:output_type -> memos.api.v1.WorkspaceSetting
+	8,  // 18: memos.api.v1.WorkspaceService.GetDefaultTagRecommendationPrompt:output_type -> memos.api.v1.GetDefaultTagRecommendationPromptResponse
+	10, // 19: memos.api.v1.WorkspaceService.TestAiConnection:output_type -> memos.api.v1.TestAiConnectionResponse
+	15, // [15:20] is the sub-list for method output_type
+	10, // [10:15] is the sub-list for method input_type
+	10, // [10:10] is the sub-list for extension type_name
+	10, // [10:10] is the sub-list for extension extendee
+	0,  // [0:10] is the sub-list for field type_name
 }
 
 func init() { file_api_v1_workspace_service_proto_init() }
@@ -1185,7 +1508,7 @@ func file_api_v1_workspace_service_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: unsafe.Slice(unsafe.StringData(file_api_v1_workspace_service_proto_rawDesc), len(file_api_v1_workspace_service_proto_rawDesc)),
 			NumEnums:      2,
-			NumMessages:   11,
+			NumMessages:   16,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
diff --git a/proto/gen/api/v1/workspace_service.pb.gw.go b/proto/gen/api/v1/workspace_service.pb.gw.go
index acfb832bd..e9c50e529 100644
--- a/proto/gen/api/v1/workspace_service.pb.gw.go
+++ b/proto/gen/api/v1/workspace_service.pb.gw.go
@@ -176,6 +176,54 @@ func local_request_WorkspaceService_UpdateWorkspaceSetting_0(ctx context.Context
 	return msg, metadata, err
 }
 
+func request_WorkspaceService_GetDefaultTagRecommendationPrompt_0(ctx context.Context, marshaler runtime.Marshaler, client WorkspaceServiceClient, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var (
+		protoReq GetDefaultTagRecommendationPromptRequest
+		metadata runtime.ServerMetadata
+	)
+	if req.Body != nil {
+		_, _ = io.Copy(io.Discard, req.Body)
+	}
+	msg, err := client.GetDefaultTagRecommendationPrompt(ctx, &protoReq, grpc.Header(&metadata.HeaderMD), grpc.Trailer(&metadata.TrailerMD))
+	return msg, metadata, err
+}
+
+func local_request_WorkspaceService_GetDefaultTagRecommendationPrompt_0(ctx context.Context, marshaler runtime.Marshaler, server WorkspaceServiceServer, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var (
+		protoReq GetDefaultTagRecommendationPromptRequest
+		metadata runtime.ServerMetadata
+	)
+	msg, err := server.GetDefaultTagRecommendationPrompt(ctx, &protoReq)
+	return msg, metadata, err
+}
+
+func request_WorkspaceService_TestAiConnection_0(ctx context.Context, marshaler runtime.Marshaler, client WorkspaceServiceClient, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var (
+		protoReq TestAiConnectionRequest
+		metadata runtime.ServerMetadata
+	)
+	if err := marshaler.NewDecoder(req.Body).Decode(&protoReq); err != nil && !errors.Is(err, io.EOF) {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+	if req.Body != nil {
+		_, _ = io.Copy(io.Discard, req.Body)
+	}
+	msg, err := client.TestAiConnection(ctx, &protoReq, grpc.Header(&metadata.HeaderMD), grpc.Trailer(&metadata.TrailerMD))
+	return msg, metadata, err
+}
+
+func local_request_WorkspaceService_TestAiConnection_0(ctx context.Context, marshaler runtime.Marshaler, server WorkspaceServiceServer, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var (
+		protoReq TestAiConnectionRequest
+		metadata runtime.ServerMetadata
+	)
+	if err := marshaler.NewDecoder(req.Body).Decode(&protoReq); err != nil && !errors.Is(err, io.EOF) {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+	msg, err := server.TestAiConnection(ctx, &protoReq)
+	return msg, metadata, err
+}
+
 // RegisterWorkspaceServiceHandlerServer registers the http handlers for service WorkspaceService to "mux".
 // UnaryRPC     :call WorkspaceServiceServer directly.
 // StreamingRPC :currently unsupported pending https://github.com/grpc/grpc-go/issues/906.
@@ -242,6 +290,46 @@ func RegisterWorkspaceServiceHandlerServer(ctx context.Context, mux *runtime.Ser
 		}
 		forward_WorkspaceService_UpdateWorkspaceSetting_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
 	})
+	mux.Handle(http.MethodGet, pattern_WorkspaceService_GetDefaultTagRecommendationPrompt_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		var stream runtime.ServerTransportStream
+		ctx = grpc.NewContextWithServerTransportStream(ctx, &stream)
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		annotatedContext, err := runtime.AnnotateIncomingContext(ctx, mux, req, "/memos.api.v1.WorkspaceService/GetDefaultTagRecommendationPrompt", runtime.WithHTTPPathPattern("/api/v1/workspace/ai/tag-recommendation/default-prompt"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := local_request_WorkspaceService_GetDefaultTagRecommendationPrompt_0(annotatedContext, inboundMarshaler, server, req, pathParams)
+		md.HeaderMD, md.TrailerMD = metadata.Join(md.HeaderMD, stream.Header()), metadata.Join(md.TrailerMD, stream.Trailer())
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		forward_WorkspaceService_GetDefaultTagRecommendationPrompt_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+	})
+	mux.Handle(http.MethodPost, pattern_WorkspaceService_TestAiConnection_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		var stream runtime.ServerTransportStream
+		ctx = grpc.NewContextWithServerTransportStream(ctx, &stream)
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		annotatedContext, err := runtime.AnnotateIncomingContext(ctx, mux, req, "/memos.api.v1.WorkspaceService/TestAiConnection", runtime.WithHTTPPathPattern("/api/v1/workspace/ai/test-connection"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := local_request_WorkspaceService_TestAiConnection_0(annotatedContext, inboundMarshaler, server, req, pathParams)
+		md.HeaderMD, md.TrailerMD = metadata.Join(md.HeaderMD, stream.Header()), metadata.Join(md.TrailerMD, stream.Trailer())
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		forward_WorkspaceService_TestAiConnection_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+	})
 
 	return nil
 }
@@ -333,17 +421,55 @@ func RegisterWorkspaceServiceHandlerClient(ctx context.Context, mux *runtime.Ser
 		}
 		forward_WorkspaceService_UpdateWorkspaceSetting_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
 	})
+	mux.Handle(http.MethodGet, pattern_WorkspaceService_GetDefaultTagRecommendationPrompt_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		annotatedContext, err := runtime.AnnotateContext(ctx, mux, req, "/memos.api.v1.WorkspaceService/GetDefaultTagRecommendationPrompt", runtime.WithHTTPPathPattern("/api/v1/workspace/ai/tag-recommendation/default-prompt"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := request_WorkspaceService_GetDefaultTagRecommendationPrompt_0(annotatedContext, inboundMarshaler, client, req, pathParams)
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		forward_WorkspaceService_GetDefaultTagRecommendationPrompt_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+	})
+	mux.Handle(http.MethodPost, pattern_WorkspaceService_TestAiConnection_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		annotatedContext, err := runtime.AnnotateContext(ctx, mux, req, "/memos.api.v1.WorkspaceService/TestAiConnection", runtime.WithHTTPPathPattern("/api/v1/workspace/ai/test-connection"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := request_WorkspaceService_TestAiConnection_0(annotatedContext, inboundMarshaler, client, req, pathParams)
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		forward_WorkspaceService_TestAiConnection_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+	})
 	return nil
 }
 
 var (
-	pattern_WorkspaceService_GetWorkspaceProfile_0    = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"api", "v1", "workspace", "profile"}, ""))
-	pattern_WorkspaceService_GetWorkspaceSetting_0    = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3, 1, 0, 4, 3, 5, 4}, []string{"api", "v1", "workspace", "settings", "name"}, ""))
-	pattern_WorkspaceService_UpdateWorkspaceSetting_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3, 1, 0, 4, 3, 5, 4}, []string{"api", "v1", "workspace", "settings", "setting.name"}, ""))
+	pattern_WorkspaceService_GetWorkspaceProfile_0               = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"api", "v1", "workspace", "profile"}, ""))
+	pattern_WorkspaceService_GetWorkspaceSetting_0               = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3, 1, 0, 4, 3, 5, 4}, []string{"api", "v1", "workspace", "settings", "name"}, ""))
+	pattern_WorkspaceService_UpdateWorkspaceSetting_0            = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3, 1, 0, 4, 3, 5, 4}, []string{"api", "v1", "workspace", "settings", "setting.name"}, ""))
+	pattern_WorkspaceService_GetDefaultTagRecommendationPrompt_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3, 2, 4, 2, 5}, []string{"api", "v1", "workspace", "ai", "tag-recommendation", "default-prompt"}, ""))
+	pattern_WorkspaceService_TestAiConnection_0                  = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3, 2, 4}, []string{"api", "v1", "workspace", "ai", "test-connection"}, ""))
 )
 
 var (
-	forward_WorkspaceService_GetWorkspaceProfile_0    = runtime.ForwardResponseMessage
-	forward_WorkspaceService_GetWorkspaceSetting_0    = runtime.ForwardResponseMessage
-	forward_WorkspaceService_UpdateWorkspaceSetting_0 = runtime.ForwardResponseMessage
+	forward_WorkspaceService_GetWorkspaceProfile_0               = runtime.ForwardResponseMessage
+	forward_WorkspaceService_GetWorkspaceSetting_0               = runtime.ForwardResponseMessage
+	forward_WorkspaceService_UpdateWorkspaceSetting_0            = runtime.ForwardResponseMessage
+	forward_WorkspaceService_GetDefaultTagRecommendationPrompt_0 = runtime.ForwardResponseMessage
+	forward_WorkspaceService_TestAiConnection_0                  = runtime.ForwardResponseMessage
 )
diff --git a/proto/gen/api/v1/workspace_service_grpc.pb.go b/proto/gen/api/v1/workspace_service_grpc.pb.go
index 36e6f3358..c54fab2a8 100644
--- a/proto/gen/api/v1/workspace_service_grpc.pb.go
+++ b/proto/gen/api/v1/workspace_service_grpc.pb.go
@@ -19,9 +19,11 @@ import (
 const _ = grpc.SupportPackageIsVersion9
 
 const (
-	WorkspaceService_GetWorkspaceProfile_FullMethodName    = "/memos.api.v1.WorkspaceService/GetWorkspaceProfile"
-	WorkspaceService_GetWorkspaceSetting_FullMethodName    = "/memos.api.v1.WorkspaceService/GetWorkspaceSetting"
-	WorkspaceService_UpdateWorkspaceSetting_FullMethodName = "/memos.api.v1.WorkspaceService/UpdateWorkspaceSetting"
+	WorkspaceService_GetWorkspaceProfile_FullMethodName               = "/memos.api.v1.WorkspaceService/GetWorkspaceProfile"
+	WorkspaceService_GetWorkspaceSetting_FullMethodName               = "/memos.api.v1.WorkspaceService/GetWorkspaceSetting"
+	WorkspaceService_UpdateWorkspaceSetting_FullMethodName            = "/memos.api.v1.WorkspaceService/UpdateWorkspaceSetting"
+	WorkspaceService_GetDefaultTagRecommendationPrompt_FullMethodName = "/memos.api.v1.WorkspaceService/GetDefaultTagRecommendationPrompt"
+	WorkspaceService_TestAiConnection_FullMethodName                  = "/memos.api.v1.WorkspaceService/TestAiConnection"
 )
 
 // WorkspaceServiceClient is the client API for WorkspaceService service.
@@ -34,6 +36,10 @@ type WorkspaceServiceClient interface {
 	GetWorkspaceSetting(ctx context.Context, in *GetWorkspaceSettingRequest, opts ...grpc.CallOption) (*WorkspaceSetting, error)
 	// Updates a workspace setting.
 	UpdateWorkspaceSetting(ctx context.Context, in *UpdateWorkspaceSettingRequest, opts ...grpc.CallOption) (*WorkspaceSetting, error)
+	// Gets the default system prompt for AI tag recommendations.
+	GetDefaultTagRecommendationPrompt(ctx context.Context, in *GetDefaultTagRecommendationPromptRequest, opts ...grpc.CallOption) (*GetDefaultTagRecommendationPromptResponse, error)
+	// Tests AI API connection and configuration.
+	TestAiConnection(ctx context.Context, in *TestAiConnectionRequest, opts ...grpc.CallOption) (*TestAiConnectionResponse, error)
 }
 
 type workspaceServiceClient struct {
@@ -74,6 +80,26 @@ func (c *workspaceServiceClient) UpdateWorkspaceSetting(ctx context.Context, in
 	return out, nil
 }
 
+func (c *workspaceServiceClient) GetDefaultTagRecommendationPrompt(ctx context.Context, in *GetDefaultTagRecommendationPromptRequest, opts ...grpc.CallOption) (*GetDefaultTagRecommendationPromptResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(GetDefaultTagRecommendationPromptResponse)
+	err := c.cc.Invoke(ctx, WorkspaceService_GetDefaultTagRecommendationPrompt_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *workspaceServiceClient) TestAiConnection(ctx context.Context, in *TestAiConnectionRequest, opts ...grpc.CallOption) (*TestAiConnectionResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(TestAiConnectionResponse)
+	err := c.cc.Invoke(ctx, WorkspaceService_TestAiConnection_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // WorkspaceServiceServer is the server API for WorkspaceService service.
 // All implementations must embed UnimplementedWorkspaceServiceServer
 // for forward compatibility.
@@ -84,6 +110,10 @@ type WorkspaceServiceServer interface {
 	GetWorkspaceSetting(context.Context, *GetWorkspaceSettingRequest) (*WorkspaceSetting, error)
 	// Updates a workspace setting.
 	UpdateWorkspaceSetting(context.Context, *UpdateWorkspaceSettingRequest) (*WorkspaceSetting, error)
+	// Gets the default system prompt for AI tag recommendations.
+	GetDefaultTagRecommendationPrompt(context.Context, *GetDefaultTagRecommendationPromptRequest) (*GetDefaultTagRecommendationPromptResponse, error)
+	// Tests AI API connection and configuration.
+	TestAiConnection(context.Context, *TestAiConnectionRequest) (*TestAiConnectionResponse, error)
 	mustEmbedUnimplementedWorkspaceServiceServer()
 }
 
@@ -103,6 +133,12 @@ func (UnimplementedWorkspaceServiceServer) GetWorkspaceSetting(context.Context,
 func (UnimplementedWorkspaceServiceServer) UpdateWorkspaceSetting(context.Context, *UpdateWorkspaceSettingRequest) (*WorkspaceSetting, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method UpdateWorkspaceSetting not implemented")
 }
+func (UnimplementedWorkspaceServiceServer) GetDefaultTagRecommendationPrompt(context.Context, *GetDefaultTagRecommendationPromptRequest) (*GetDefaultTagRecommendationPromptResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetDefaultTagRecommendationPrompt not implemented")
+}
+func (UnimplementedWorkspaceServiceServer) TestAiConnection(context.Context, *TestAiConnectionRequest) (*TestAiConnectionResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method TestAiConnection not implemented")
+}
 func (UnimplementedWorkspaceServiceServer) mustEmbedUnimplementedWorkspaceServiceServer() {}
 func (UnimplementedWorkspaceServiceServer) testEmbeddedByValue()                          {}
 
@@ -178,6 +214,42 @@ func _WorkspaceService_UpdateWorkspaceSetting_Handler(srv interface{}, ctx conte
 	return interceptor(ctx, in, info, handler)
 }
 
+func _WorkspaceService_GetDefaultTagRecommendationPrompt_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetDefaultTagRecommendationPromptRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(WorkspaceServiceServer).GetDefaultTagRecommendationPrompt(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: WorkspaceService_GetDefaultTagRecommendationPrompt_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(WorkspaceServiceServer).GetDefaultTagRecommendationPrompt(ctx, req.(*GetDefaultTagRecommendationPromptRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _WorkspaceService_TestAiConnection_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(TestAiConnectionRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(WorkspaceServiceServer).TestAiConnection(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: WorkspaceService_TestAiConnection_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(WorkspaceServiceServer).TestAiConnection(ctx, req.(*TestAiConnectionRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 // WorkspaceService_ServiceDesc is the grpc.ServiceDesc for WorkspaceService service.
 // It's only intended for direct use with grpc.RegisterService,
 // and not to be introspected or modified (even as a copy)
@@ -197,6 +269,14 @@ var WorkspaceService_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "UpdateWorkspaceSetting",
 			Handler:    _WorkspaceService_UpdateWorkspaceSetting_Handler,
 		},
+		{
+			MethodName: "GetDefaultTagRecommendationPrompt",
+			Handler:    _WorkspaceService_GetDefaultTagRecommendationPrompt_Handler,
+		},
+		{
+			MethodName: "TestAiConnection",
+			Handler:    _WorkspaceService_TestAiConnection_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "api/v1/workspace_service.proto",
diff --git a/proto/gen/openapi.yaml b/proto/gen/openapi.yaml
index e6e109c60..baa6f5df0 100644
--- a/proto/gen/openapi.yaml
+++ b/proto/gen/openapi.yaml
@@ -1164,6 +1164,31 @@ paths:
                         application/json:
                             schema:
                                 $ref: '#/components/schemas/Status'
+    /api/v1/memos:suggest-tags:
+        post:
+            tags:
+                - MemoService
+            description: SuggestMemoTags suggests tags for memo content.
+            operationId: MemoService_SuggestMemoTags
+            requestBody:
+                content:
+                    application/json:
+                        schema:
+                            $ref: '#/components/schemas/SuggestMemoTagsRequest'
+                required: true
+            responses:
+                "200":
+                    description: OK
+                    content:
+                        application/json:
+                            schema:
+                                $ref: '#/components/schemas/SuggestMemoTagsResponse'
+                default:
+                    description: Default error response
+                    content:
+                        application/json:
+                            schema:
+                                $ref: '#/components/schemas/Status'
     /api/v1/reactions/{reaction}:
         delete:
             tags:
@@ -2083,6 +2108,50 @@ paths:
                         application/json:
                             schema:
                                 $ref: '#/components/schemas/Status'
+    /api/v1/workspace/ai/tag-recommendation/default-prompt:
+        get:
+            tags:
+                - WorkspaceService
+            description: Gets the default system prompt for AI tag recommendations.
+            operationId: WorkspaceService_GetDefaultTagRecommendationPrompt
+            responses:
+                "200":
+                    description: OK
+                    content:
+                        application/json:
+                            schema:
+                                $ref: '#/components/schemas/GetDefaultTagRecommendationPromptResponse'
+                default:
+                    description: Default error response
+                    content:
+                        application/json:
+                            schema:
+                                $ref: '#/components/schemas/Status'
+    /api/v1/workspace/ai/test-connection:
+        post:
+            tags:
+                - WorkspaceService
+            description: Tests AI API connection and configuration.
+            operationId: WorkspaceService_TestAiConnection
+            requestBody:
+                content:
+                    application/json:
+                        schema:
+                            $ref: '#/components/schemas/TestAiConnectionRequest'
+                required: true
+            responses:
+                "200":
+                    description: OK
+                    content:
+                        application/json:
+                            schema:
+                                $ref: '#/components/schemas/TestAiConnectionResponse'
+                default:
+                    description: Default error response
+                    content:
+                        application/json:
+                            schema:
+                                $ref: '#/components/schemas/Status'
     /api/v1/workspace/profile:
         get:
             tags:
@@ -2478,6 +2547,13 @@ components:
                         Last time the session was accessed.
                          Used for sliding expiration calculation (last_accessed_time + 2 weeks).
                     format: date-time
+        GetDefaultTagRecommendationPromptResponse:
+            type: object
+            properties:
+                systemPrompt:
+                    type: string
+                    description: The default system prompt for tag recommendation.
+            description: Response message for GetDefaultTagRecommendationPrompt method.
         GoogleProtobufAny:
             type: object
             properties:
@@ -3390,6 +3466,27 @@ components:
             properties:
                 content:
                     type: string
+        SuggestMemoTagsRequest:
+            required:
+                - content
+            type: object
+            properties:
+                content:
+                    type: string
+                    description: Required. The content of the memo for tag suggestion.
+                existingTags:
+                    type: array
+                    items:
+                        type: string
+                    description: Optional. The existing tags for the memo.
+        SuggestMemoTagsResponse:
+            type: object
+            properties:
+                suggestedTags:
+                    type: array
+                    items:
+                        $ref: '#/components/schemas/TagSuggestion'
+                    description: The suggested tags with reasons for the memo.
         SuperscriptNode:
             type: object
             properties:
@@ -3422,6 +3519,18 @@ components:
             properties:
                 content:
                     type: string
+        TagSuggestion:
+            required:
+                - tag
+                - reason
+            type: object
+            properties:
+                tag:
+                    type: string
+                    description: The suggested tag name.
+                reason:
+                    type: string
+                    description: The reason why this tag is recommended.
         TaskListItemNode:
             type: object
             properties:
@@ -3436,6 +3545,36 @@ components:
                     type: array
                     items:
                         $ref: '#/components/schemas/Node'
+        TestAiConnectionRequest:
+            type: object
+            properties:
+                baseUrl:
+                    type: string
+                    description: base_url is the base URL for AI API.
+                apiKey:
+                    type: string
+                    description: api_key is the API key for AI service.
+                model:
+                    type: string
+                    description: model is the AI model to use.
+                timeoutSeconds:
+                    type: integer
+                    description: timeout_seconds is the timeout for AI requests in seconds.
+                    format: int32
+            description: Request message for TestAiConnection method.
+        TestAiConnectionResponse:
+            type: object
+            properties:
+                success:
+                    type: boolean
+                    description: success indicates whether the connection test was successful.
+                message:
+                    type: string
+                    description: message provides additional information about the test result.
+                modelInfo:
+                    type: string
+                    description: model_info contains information about the tested model (if successful).
+            description: Response message for TestAiConnection method.
         TextNode:
             type: object
             properties:
@@ -3788,6 +3927,10 @@ components:
                     type: integer
                     description: timeout_seconds is the timeout for AI requests in seconds.
                     format: int32
+                tagRecommendation:
+                    allOf:
+                        - $ref: '#/components/schemas/WorkspaceSetting_TagRecommendationConfig'
+                    description: tag_recommendation contains tag recommendation specific settings.
             description: AI configuration settings for workspace AI features.
         WorkspaceSetting_GeneralSetting:
             type: object
@@ -3888,6 +4031,20 @@ components:
                         - $ref: '#/components/schemas/StorageSetting_S3Config'
                     description: The S3 config.
             description: Storage configuration settings for workspace attachments.
+        WorkspaceSetting_TagRecommendationConfig:
+            type: object
+            properties:
+                enabled:
+                    type: boolean
+                    description: enabled controls whether tag recommendation is enabled.
+                systemPrompt:
+                    type: string
+                    description: system_prompt is the custom system prompt for tag recommendation.
+                requestsPerMinute:
+                    type: integer
+                    description: requests_per_minute is the rate limit for tag recommendation requests.
+                    format: int32
+            description: Tag recommendation configuration.
 tags:
     - name: ActivityService
     - name: AttachmentService
diff --git a/proto/gen/store/workspace_setting.pb.go b/proto/gen/store/workspace_setting.pb.go
index f95de9cd5..6f4c0f7b9 100644
--- a/proto/gen/store/workspace_setting.pb.go
+++ b/proto/gen/store/workspace_setting.pb.go
@@ -806,8 +806,10 @@ type WorkspaceAISetting struct {
 	Model string `protobuf:"bytes,4,opt,name=model,proto3" json:"model,omitempty"`
 	// timeout_seconds is the timeout for AI requests in seconds.
 	TimeoutSeconds int32 `protobuf:"varint,5,opt,name=timeout_seconds,json=timeoutSeconds,proto3" json:"timeout_seconds,omitempty"`
-	unknownFields  protoimpl.UnknownFields
-	sizeCache      protoimpl.SizeCache
+	// tag_recommendation contains tag recommendation specific settings.
+	TagRecommendation *TagRecommendationConfig `protobuf:"bytes,6,opt,name=tag_recommendation,json=tagRecommendation,proto3" json:"tag_recommendation,omitempty"`
+	unknownFields     protoimpl.UnknownFields
+	sizeCache         protoimpl.SizeCache
 }
 
 func (x *WorkspaceAISetting) Reset() {
@@ -875,6 +877,76 @@ func (x *WorkspaceAISetting) GetTimeoutSeconds() int32 {
 	return 0
 }
 
+func (x *WorkspaceAISetting) GetTagRecommendation() *TagRecommendationConfig {
+	if x != nil {
+		return x.TagRecommendation
+	}
+	return nil
+}
+
+type TagRecommendationConfig struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// enabled controls whether tag recommendation is enabled.
+	Enabled bool `protobuf:"varint,1,opt,name=enabled,proto3" json:"enabled,omitempty"`
+	// system_prompt is the custom system prompt for tag recommendation.
+	SystemPrompt string `protobuf:"bytes,2,opt,name=system_prompt,json=systemPrompt,proto3" json:"system_prompt,omitempty"`
+	// requests_per_minute is the rate limit for tag recommendation requests.
+	RequestsPerMinute int32 `protobuf:"varint,3,opt,name=requests_per_minute,json=requestsPerMinute,proto3" json:"requests_per_minute,omitempty"`
+	unknownFields     protoimpl.UnknownFields
+	sizeCache         protoimpl.SizeCache
+}
+
+func (x *TagRecommendationConfig) Reset() {
+	*x = TagRecommendationConfig{}
+	mi := &file_store_workspace_setting_proto_msgTypes[8]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *TagRecommendationConfig) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*TagRecommendationConfig) ProtoMessage() {}
+
+func (x *TagRecommendationConfig) ProtoReflect() protoreflect.Message {
+	mi := &file_store_workspace_setting_proto_msgTypes[8]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use TagRecommendationConfig.ProtoReflect.Descriptor instead.
+func (*TagRecommendationConfig) Descriptor() ([]byte, []int) {
+	return file_store_workspace_setting_proto_rawDescGZIP(), []int{8}
+}
+
+func (x *TagRecommendationConfig) GetEnabled() bool {
+	if x != nil {
+		return x.Enabled
+	}
+	return false
+}
+
+func (x *TagRecommendationConfig) GetSystemPrompt() string {
+	if x != nil {
+		return x.SystemPrompt
+	}
+	return ""
+}
+
+func (x *TagRecommendationConfig) GetRequestsPerMinute() int32 {
+	if x != nil {
+		return x.RequestsPerMinute
+	}
+	return 0
+}
+
 var File_store_workspace_setting_proto protoreflect.FileDescriptor
 
 const file_store_workspace_setting_proto_rawDesc = "" +
@@ -935,13 +1007,18 @@ const file_store_workspace_setting_proto_rawDesc = "" +
 	"\x1adisable_markdown_shortcuts\x18\b \x01(\bR\x18disableMarkdownShortcuts\x127\n" +
 	"\x18enable_blur_nsfw_content\x18\t \x01(\bR\x15enableBlurNsfwContent\x12\x1b\n" +
 	"\tnsfw_tags\x18\n" +
-	" \x03(\tR\bnsfwTags\"\xa4\x01\n" +
+	" \x03(\tR\bnsfwTags\"\xf9\x01\n" +
 	"\x12WorkspaceAISetting\x12\x1b\n" +
 	"\tenable_ai\x18\x01 \x01(\bR\benableAi\x12\x19\n" +
 	"\bbase_url\x18\x02 \x01(\tR\abaseUrl\x12\x17\n" +
 	"\aapi_key\x18\x03 \x01(\tR\x06apiKey\x12\x14\n" +
 	"\x05model\x18\x04 \x01(\tR\x05model\x12'\n" +
-	"\x0ftimeout_seconds\x18\x05 \x01(\x05R\x0etimeoutSeconds*{\n" +
+	"\x0ftimeout_seconds\x18\x05 \x01(\x05R\x0etimeoutSeconds\x12S\n" +
+	"\x12tag_recommendation\x18\x06 \x01(\v2$.memos.store.TagRecommendationConfigR\x11tagRecommendation\"\x88\x01\n" +
+	"\x17TagRecommendationConfig\x12\x18\n" +
+	"\aenabled\x18\x01 \x01(\bR\aenabled\x12#\n" +
+	"\rsystem_prompt\x18\x02 \x01(\tR\fsystemPrompt\x12.\n" +
+	"\x13requests_per_minute\x18\x03 \x01(\x05R\x11requestsPerMinute*{\n" +
 	"\x13WorkspaceSettingKey\x12%\n" +
 	"!WORKSPACE_SETTING_KEY_UNSPECIFIED\x10\x00\x12\t\n" +
 	"\x05BASIC\x10\x01\x12\v\n" +
@@ -964,7 +1041,7 @@ func file_store_workspace_setting_proto_rawDescGZIP() []byte {
 }
 
 var file_store_workspace_setting_proto_enumTypes = make([]protoimpl.EnumInfo, 2)
-var file_store_workspace_setting_proto_msgTypes = make([]protoimpl.MessageInfo, 8)
+var file_store_workspace_setting_proto_msgTypes = make([]protoimpl.MessageInfo, 9)
 var file_store_workspace_setting_proto_goTypes = []any{
 	(WorkspaceSettingKey)(0),                 // 0: memos.store.WorkspaceSettingKey
 	(WorkspaceStorageSetting_StorageType)(0), // 1: memos.store.WorkspaceStorageSetting.StorageType
@@ -976,22 +1053,24 @@ var file_store_workspace_setting_proto_goTypes = []any{
 	(*StorageS3Config)(nil),                  // 7: memos.store.StorageS3Config
 	(*WorkspaceMemoRelatedSetting)(nil),      // 8: memos.store.WorkspaceMemoRelatedSetting
 	(*WorkspaceAISetting)(nil),               // 9: memos.store.WorkspaceAISetting
+	(*TagRecommendationConfig)(nil),          // 10: memos.store.TagRecommendationConfig
 }
 var file_store_workspace_setting_proto_depIdxs = []int32{
-	0, // 0: memos.store.WorkspaceSetting.key:type_name -> memos.store.WorkspaceSettingKey
-	3, // 1: memos.store.WorkspaceSetting.basic_setting:type_name -> memos.store.WorkspaceBasicSetting
-	4, // 2: memos.store.WorkspaceSetting.general_setting:type_name -> memos.store.WorkspaceGeneralSetting
-	6, // 3: memos.store.WorkspaceSetting.storage_setting:type_name -> memos.store.WorkspaceStorageSetting
-	8, // 4: memos.store.WorkspaceSetting.memo_related_setting:type_name -> memos.store.WorkspaceMemoRelatedSetting
-	9, // 5: memos.store.WorkspaceSetting.ai_setting:type_name -> memos.store.WorkspaceAISetting
-	5, // 6: memos.store.WorkspaceGeneralSetting.custom_profile:type_name -> memos.store.WorkspaceCustomProfile
-	1, // 7: memos.store.WorkspaceStorageSetting.storage_type:type_name -> memos.store.WorkspaceStorageSetting.StorageType
-	7, // 8: memos.store.WorkspaceStorageSetting.s3_config:type_name -> memos.store.StorageS3Config
-	9, // [9:9] is the sub-list for method output_type
-	9, // [9:9] is the sub-list for method input_type
-	9, // [9:9] is the sub-list for extension type_name
-	9, // [9:9] is the sub-list for extension extendee
-	0, // [0:9] is the sub-list for field type_name
+	0,  // 0: memos.store.WorkspaceSetting.key:type_name -> memos.store.WorkspaceSettingKey
+	3,  // 1: memos.store.WorkspaceSetting.basic_setting:type_name -> memos.store.WorkspaceBasicSetting
+	4,  // 2: memos.store.WorkspaceSetting.general_setting:type_name -> memos.store.WorkspaceGeneralSetting
+	6,  // 3: memos.store.WorkspaceSetting.storage_setting:type_name -> memos.store.WorkspaceStorageSetting
+	8,  // 4: memos.store.WorkspaceSetting.memo_related_setting:type_name -> memos.store.WorkspaceMemoRelatedSetting
+	9,  // 5: memos.store.WorkspaceSetting.ai_setting:type_name -> memos.store.WorkspaceAISetting
+	5,  // 6: memos.store.WorkspaceGeneralSetting.custom_profile:type_name -> memos.store.WorkspaceCustomProfile
+	1,  // 7: memos.store.WorkspaceStorageSetting.storage_type:type_name -> memos.store.WorkspaceStorageSetting.StorageType
+	7,  // 8: memos.store.WorkspaceStorageSetting.s3_config:type_name -> memos.store.StorageS3Config
+	10, // 9: memos.store.WorkspaceAISetting.tag_recommendation:type_name -> memos.store.TagRecommendationConfig
+	10, // [10:10] is the sub-list for method output_type
+	10, // [10:10] is the sub-list for method input_type
+	10, // [10:10] is the sub-list for extension type_name
+	10, // [10:10] is the sub-list for extension extendee
+	0,  // [0:10] is the sub-list for field type_name
 }
 
 func init() { file_store_workspace_setting_proto_init() }
@@ -1012,7 +1091,7 @@ func file_store_workspace_setting_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: unsafe.Slice(unsafe.StringData(file_store_workspace_setting_proto_rawDesc), len(file_store_workspace_setting_proto_rawDesc)),
 			NumEnums:      2,
-			NumMessages:   8,
+			NumMessages:   9,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/web/src/types/proto/api/v1/memo_service.ts b/web/src/types/proto/api/v1/memo_service.ts
index 1f6406f81..f64b112be 100644
--- a/web/src/types/proto/api/v1/memo_service.ts
+++ b/web/src/types/proto/api/v1/memo_service.ts
@@ -482,6 +482,25 @@ export interface DeleteMemoReactionRequest {
   name: string;
 }
 
+export interface SuggestMemoTagsRequest {
+  /** Required. The content of the memo for tag suggestion. */
+  content: string;
+  /** Optional. The existing tags for the memo. */
+  existingTags: string[];
+}
+
+export interface TagSuggestion {
+  /** The suggested tag name. */
+  tag: string;
+  /** The reason why this tag is recommended. */
+  reason: string;
+}
+
+export interface SuggestMemoTagsResponse {
+  /** The suggested tags with reasons for the memo. */
+  suggestedTags: TagSuggestion[];
+}
+
 function createBaseReaction(): Reaction {
   return { name: "", creator: "", contentId: "", reactionType: "", createTime: undefined };
 }
@@ -2583,6 +2602,168 @@ export const DeleteMemoReactionRequest: MessageFns<DeleteMemoReactionRequest> =
   },
 };
 
+function createBaseSuggestMemoTagsRequest(): SuggestMemoTagsRequest {
+  return { content: "", existingTags: [] };
+}
+
+export const SuggestMemoTagsRequest: MessageFns<SuggestMemoTagsRequest> = {
+  encode(message: SuggestMemoTagsRequest, writer: BinaryWriter = new BinaryWriter()): BinaryWriter {
+    if (message.content !== "") {
+      writer.uint32(10).string(message.content);
+    }
+    for (const v of message.existingTags) {
+      writer.uint32(18).string(v!);
+    }
+    return writer;
+  },
+
+  decode(input: BinaryReader | Uint8Array, length?: number): SuggestMemoTagsRequest {
+    const reader = input instanceof BinaryReader ? input : new BinaryReader(input);
+    let end = length === undefined ? reader.len : reader.pos + length;
+    const message = createBaseSuggestMemoTagsRequest();
+    while (reader.pos < end) {
+      const tag = reader.uint32();
+      switch (tag >>> 3) {
+        case 1: {
+          if (tag !== 10) {
+            break;
+          }
+
+          message.content = reader.string();
+          continue;
+        }
+        case 2: {
+          if (tag !== 18) {
+            break;
+          }
+
+          message.existingTags.push(reader.string());
+          continue;
+        }
+      }
+      if ((tag & 7) === 4 || tag === 0) {
+        break;
+      }
+      reader.skip(tag & 7);
+    }
+    return message;
+  },
+
+  create(base?: DeepPartial<SuggestMemoTagsRequest>): SuggestMemoTagsRequest {
+    return SuggestMemoTagsRequest.fromPartial(base ?? {});
+  },
+  fromPartial(object: DeepPartial<SuggestMemoTagsRequest>): SuggestMemoTagsRequest {
+    const message = createBaseSuggestMemoTagsRequest();
+    message.content = object.content ?? "";
+    message.existingTags = object.existingTags?.map((e) => e) || [];
+    return message;
+  },
+};
+
+function createBaseTagSuggestion(): TagSuggestion {
+  return { tag: "", reason: "" };
+}
+
+export const TagSuggestion: MessageFns<TagSuggestion> = {
+  encode(message: TagSuggestion, writer: BinaryWriter = new BinaryWriter()): BinaryWriter {
+    if (message.tag !== "") {
+      writer.uint32(10).string(message.tag);
+    }
+    if (message.reason !== "") {
+      writer.uint32(18).string(message.reason);
+    }
+    return writer;
+  },
+
+  decode(input: BinaryReader | Uint8Array, length?: number): TagSuggestion {
+    const reader = input instanceof BinaryReader ? input : new BinaryReader(input);
+    let end = length === undefined ? reader.len : reader.pos + length;
+    const message = createBaseTagSuggestion();
+    while (reader.pos < end) {
+      const tag = reader.uint32();
+      switch (tag >>> 3) {
+        case 1: {
+          if (tag !== 10) {
+            break;
+          }
+
+          message.tag = reader.string();
+          continue;
+        }
+        case 2: {
+          if (tag !== 18) {
+            break;
+          }
+
+          message.reason = reader.string();
+          continue;
+        }
+      }
+      if ((tag & 7) === 4 || tag === 0) {
+        break;
+      }
+      reader.skip(tag & 7);
+    }
+    return message;
+  },
+
+  create(base?: DeepPartial<TagSuggestion>): TagSuggestion {
+    return TagSuggestion.fromPartial(base ?? {});
+  },
+  fromPartial(object: DeepPartial<TagSuggestion>): TagSuggestion {
+    const message = createBaseTagSuggestion();
+    message.tag = object.tag ?? "";
+    message.reason = object.reason ?? "";
+    return message;
+  },
+};
+
+function createBaseSuggestMemoTagsResponse(): SuggestMemoTagsResponse {
+  return { suggestedTags: [] };
+}
+
+export const SuggestMemoTagsResponse: MessageFns<SuggestMemoTagsResponse> = {
+  encode(message: SuggestMemoTagsResponse, writer: BinaryWriter = new BinaryWriter()): BinaryWriter {
+    for (const v of message.suggestedTags) {
+      TagSuggestion.encode(v!, writer.uint32(10).fork()).join();
+    }
+    return writer;
+  },
+
+  decode(input: BinaryReader | Uint8Array, length?: number): SuggestMemoTagsResponse {
+    const reader = input instanceof BinaryReader ? input : new BinaryReader(input);
+    let end = length === undefined ? reader.len : reader.pos + length;
+    const message = createBaseSuggestMemoTagsResponse();
+    while (reader.pos < end) {
+      const tag = reader.uint32();
+      switch (tag >>> 3) {
+        case 1: {
+          if (tag !== 10) {
+            break;
+          }
+
+          message.suggestedTags.push(TagSuggestion.decode(reader, reader.uint32()));
+          continue;
+        }
+      }
+      if ((tag & 7) === 4 || tag === 0) {
+        break;
+      }
+      reader.skip(tag & 7);
+    }
+    return message;
+  },
+
+  create(base?: DeepPartial<SuggestMemoTagsResponse>): SuggestMemoTagsResponse {
+    return SuggestMemoTagsResponse.fromPartial(base ?? {});
+  },
+  fromPartial(object: DeepPartial<SuggestMemoTagsResponse>): SuggestMemoTagsResponse {
+    const message = createBaseSuggestMemoTagsResponse();
+    message.suggestedTags = object.suggestedTags?.map((e) => TagSuggestion.fromPartial(e)) || [];
+    return message;
+  },
+};
+
 export type MemoServiceDefinition = typeof MemoServiceDefinition;
 export const MemoServiceDefinition = {
   name: "MemoService",
@@ -3404,6 +3585,54 @@ export const MemoServiceDefinition = {
         },
       },
     },
+    /** SuggestMemoTags suggests tags for memo content. */
+    suggestMemoTags: {
+      name: "SuggestMemoTags",
+      requestType: SuggestMemoTagsRequest,
+      requestStream: false,
+      responseType: SuggestMemoTagsResponse,
+      responseStream: false,
+      options: {
+        _unknownFields: {
+          578365826: [
+            new Uint8Array([
+              31,
+              58,
+              1,
+              42,
+              34,
+              26,
+              47,
+              97,
+              112,
+              105,
+              47,
+              118,
+              49,
+              47,
+              109,
+              101,
+              109,
+              111,
+              115,
+              58,
+              115,
+              117,
+              103,
+              103,
+              101,
+              115,
+              116,
+              45,
+              116,
+              97,
+              103,
+              115,
+            ]),
+          ],
+        },
+      },
+    },
   },
 } as const;
 
diff --git a/web/src/types/proto/api/v1/workspace_service.ts b/web/src/types/proto/api/v1/workspace_service.ts
index 5c2952547..9c22181bb 100644
--- a/web/src/types/proto/api/v1/workspace_service.ts
+++ b/web/src/types/proto/api/v1/workspace_service.ts
@@ -252,6 +252,18 @@ export interface WorkspaceSetting_AiSetting {
   model: string;
   /** timeout_seconds is the timeout for AI requests in seconds. */
   timeoutSeconds: number;
+  /** tag_recommendation contains tag recommendation specific settings. */
+  tagRecommendation?: WorkspaceSetting_TagRecommendationConfig | undefined;
+}
+
+/** Tag recommendation configuration. */
+export interface WorkspaceSetting_TagRecommendationConfig {
+  /** enabled controls whether tag recommendation is enabled. */
+  enabled: boolean;
+  /** system_prompt is the custom system prompt for tag recommendation. */
+  systemPrompt: string;
+  /** requests_per_minute is the rate limit for tag recommendation requests. */
+  requestsPerMinute: number;
 }
 
 /** Request message for GetWorkspaceSetting method. */
@@ -273,6 +285,38 @@ export interface UpdateWorkspaceSettingRequest {
   updateMask?: string[] | undefined;
 }
 
+/** Request message for GetDefaultTagRecommendationPrompt method. */
+export interface GetDefaultTagRecommendationPromptRequest {
+}
+
+/** Response message for GetDefaultTagRecommendationPrompt method. */
+export interface GetDefaultTagRecommendationPromptResponse {
+  /** The default system prompt for tag recommendation. */
+  systemPrompt: string;
+}
+
+/** Request message for TestAiConnection method. */
+export interface TestAiConnectionRequest {
+  /** base_url is the base URL for AI API. */
+  baseUrl: string;
+  /** api_key is the API key for AI service. */
+  apiKey: string;
+  /** model is the AI model to use. */
+  model: string;
+  /** timeout_seconds is the timeout for AI requests in seconds. */
+  timeoutSeconds: number;
+}
+
+/** Response message for TestAiConnection method. */
+export interface TestAiConnectionResponse {
+  /** success indicates whether the connection test was successful. */
+  success: boolean;
+  /** message provides additional information about the test result. */
+  message: string;
+  /** model_info contains information about the tested model (if successful). */
+  modelInfo: string;
+}
+
 function createBaseWorkspaceProfile(): WorkspaceProfile {
   return { owner: "", version: "", mode: "", instanceUrl: "" };
 }
@@ -1089,7 +1133,7 @@ export const WorkspaceSetting_MemoRelatedSetting: MessageFns<WorkspaceSetting_Me
 };
 
 function createBaseWorkspaceSetting_AiSetting(): WorkspaceSetting_AiSetting {
-  return { enableAi: false, baseUrl: "", apiKey: "", model: "", timeoutSeconds: 0 };
+  return { enableAi: false, baseUrl: "", apiKey: "", model: "", timeoutSeconds: 0, tagRecommendation: undefined };
 }
 
 export const WorkspaceSetting_AiSetting: MessageFns<WorkspaceSetting_AiSetting> = {
@@ -1109,6 +1153,9 @@ export const WorkspaceSetting_AiSetting: MessageFns<WorkspaceSetting_AiSetting>
     if (message.timeoutSeconds !== 0) {
       writer.uint32(40).int32(message.timeoutSeconds);
     }
+    if (message.tagRecommendation !== undefined) {
+      WorkspaceSetting_TagRecommendationConfig.encode(message.tagRecommendation, writer.uint32(50).fork()).join();
+    }
     return writer;
   },
 
@@ -1159,6 +1206,14 @@ export const WorkspaceSetting_AiSetting: MessageFns<WorkspaceSetting_AiSetting>
           message.timeoutSeconds = reader.int32();
           continue;
         }
+        case 6: {
+          if (tag !== 50) {
+            break;
+          }
+
+          message.tagRecommendation = WorkspaceSetting_TagRecommendationConfig.decode(reader, reader.uint32());
+          continue;
+        }
       }
       if ((tag & 7) === 4 || tag === 0) {
         break;
@@ -1178,6 +1233,79 @@ export const WorkspaceSetting_AiSetting: MessageFns<WorkspaceSetting_AiSetting>
     message.apiKey = object.apiKey ?? "";
     message.model = object.model ?? "";
     message.timeoutSeconds = object.timeoutSeconds ?? 0;
+    message.tagRecommendation = (object.tagRecommendation !== undefined && object.tagRecommendation !== null)
+      ? WorkspaceSetting_TagRecommendationConfig.fromPartial(object.tagRecommendation)
+      : undefined;
+    return message;
+  },
+};
+
+function createBaseWorkspaceSetting_TagRecommendationConfig(): WorkspaceSetting_TagRecommendationConfig {
+  return { enabled: false, systemPrompt: "", requestsPerMinute: 0 };
+}
+
+export const WorkspaceSetting_TagRecommendationConfig: MessageFns<WorkspaceSetting_TagRecommendationConfig> = {
+  encode(message: WorkspaceSetting_TagRecommendationConfig, writer: BinaryWriter = new BinaryWriter()): BinaryWriter {
+    if (message.enabled !== false) {
+      writer.uint32(8).bool(message.enabled);
+    }
+    if (message.systemPrompt !== "") {
+      writer.uint32(18).string(message.systemPrompt);
+    }
+    if (message.requestsPerMinute !== 0) {
+      writer.uint32(24).int32(message.requestsPerMinute);
+    }
+    return writer;
+  },
+
+  decode(input: BinaryReader | Uint8Array, length?: number): WorkspaceSetting_TagRecommendationConfig {
+    const reader = input instanceof BinaryReader ? input : new BinaryReader(input);
+    let end = length === undefined ? reader.len : reader.pos + length;
+    const message = createBaseWorkspaceSetting_TagRecommendationConfig();
+    while (reader.pos < end) {
+      const tag = reader.uint32();
+      switch (tag >>> 3) {
+        case 1: {
+          if (tag !== 8) {
+            break;
+          }
+
+          message.enabled = reader.bool();
+          continue;
+        }
+        case 2: {
+          if (tag !== 18) {
+            break;
+          }
+
+          message.systemPrompt = reader.string();
+          continue;
+        }
+        case 3: {
+          if (tag !== 24) {
+            break;
+          }
+
+          message.requestsPerMinute = reader.int32();
+          continue;
+        }
+      }
+      if ((tag & 7) === 4 || tag === 0) {
+        break;
+      }
+      reader.skip(tag & 7);
+    }
+    return message;
+  },
+
+  create(base?: DeepPartial<WorkspaceSetting_TagRecommendationConfig>): WorkspaceSetting_TagRecommendationConfig {
+    return WorkspaceSetting_TagRecommendationConfig.fromPartial(base ?? {});
+  },
+  fromPartial(object: DeepPartial<WorkspaceSetting_TagRecommendationConfig>): WorkspaceSetting_TagRecommendationConfig {
+    const message = createBaseWorkspaceSetting_TagRecommendationConfig();
+    message.enabled = object.enabled ?? false;
+    message.systemPrompt = object.systemPrompt ?? "";
+    message.requestsPerMinute = object.requestsPerMinute ?? 0;
     return message;
   },
 };
@@ -1288,6 +1416,240 @@ export const UpdateWorkspaceSettingRequest: MessageFns<UpdateWorkspaceSettingReq
   },
 };
 
+function createBaseGetDefaultTagRecommendationPromptRequest(): GetDefaultTagRecommendationPromptRequest {
+  return {};
+}
+
+export const GetDefaultTagRecommendationPromptRequest: MessageFns<GetDefaultTagRecommendationPromptRequest> = {
+  encode(_: GetDefaultTagRecommendationPromptRequest, writer: BinaryWriter = new BinaryWriter()): BinaryWriter {
+    return writer;
+  },
+
+  decode(input: BinaryReader | Uint8Array, length?: number): GetDefaultTagRecommendationPromptRequest {
+    const reader = input instanceof BinaryReader ? input : new BinaryReader(input);
+    let end = length === undefined ? reader.len : reader.pos + length;
+    const message = createBaseGetDefaultTagRecommendationPromptRequest();
+    while (reader.pos < end) {
+      const tag = reader.uint32();
+      switch (tag >>> 3) {
+      }
+      if ((tag & 7) === 4 || tag === 0) {
+        break;
+      }
+      reader.skip(tag & 7);
+    }
+    return message;
+  },
+
+  create(base?: DeepPartial<GetDefaultTagRecommendationPromptRequest>): GetDefaultTagRecommendationPromptRequest {
+    return GetDefaultTagRecommendationPromptRequest.fromPartial(base ?? {});
+  },
+  fromPartial(_: DeepPartial<GetDefaultTagRecommendationPromptRequest>): GetDefaultTagRecommendationPromptRequest {
+    const message = createBaseGetDefaultTagRecommendationPromptRequest();
+    return message;
+  },
+};
+
+function createBaseGetDefaultTagRecommendationPromptResponse(): GetDefaultTagRecommendationPromptResponse {
+  return { systemPrompt: "" };
+}
+
+export const GetDefaultTagRecommendationPromptResponse: MessageFns<GetDefaultTagRecommendationPromptResponse> = {
+  encode(message: GetDefaultTagRecommendationPromptResponse, writer: BinaryWriter = new BinaryWriter()): BinaryWriter {
+    if (message.systemPrompt !== "") {
+      writer.uint32(10).string(message.systemPrompt);
+    }
+    return writer;
+  },
+
+  decode(input: BinaryReader | Uint8Array, length?: number): GetDefaultTagRecommendationPromptResponse {
+    const reader = input instanceof BinaryReader ? input : new BinaryReader(input);
+    let end = length === undefined ? reader.len : reader.pos + length;
+    const message = createBaseGetDefaultTagRecommendationPromptResponse();
+    while (reader.pos < end) {
+      const tag = reader.uint32();
+      switch (tag >>> 3) {
+        case 1: {
+          if (tag !== 10) {
+            break;
+          }
+
+          message.systemPrompt = reader.string();
+          continue;
+        }
+      }
+      if ((tag & 7) === 4 || tag === 0) {
+        break;
+      }
+      reader.skip(tag & 7);
+    }
+    return message;
+  },
+
+  create(base?: DeepPartial<GetDefaultTagRecommendationPromptResponse>): GetDefaultTagRecommendationPromptResponse {
+    return GetDefaultTagRecommendationPromptResponse.fromPartial(base ?? {});
+  },
+  fromPartial(
+    object: DeepPartial<GetDefaultTagRecommendationPromptResponse>,
+  ): GetDefaultTagRecommendationPromptResponse {
+    const message = createBaseGetDefaultTagRecommendationPromptResponse();
+    message.systemPrompt = object.systemPrompt ?? "";
+    return message;
+  },
+};
+
+function createBaseTestAiConnectionRequest(): TestAiConnectionRequest {
+  return { baseUrl: "", apiKey: "", model: "", timeoutSeconds: 0 };
+}
+
+export const TestAiConnectionRequest: MessageFns<TestAiConnectionRequest> = {
+  encode(message: TestAiConnectionRequest, writer: BinaryWriter = new BinaryWriter()): BinaryWriter {
+    if (message.baseUrl !== "") {
+      writer.uint32(10).string(message.baseUrl);
+    }
+    if (message.apiKey !== "") {
+      writer.uint32(18).string(message.apiKey);
+    }
+    if (message.model !== "") {
+      writer.uint32(26).string(message.model);
+    }
+    if (message.timeoutSeconds !== 0) {
+      writer.uint32(32).int32(message.timeoutSeconds);
+    }
+    return writer;
+  },
+
+  decode(input: BinaryReader | Uint8Array, length?: number): TestAiConnectionRequest {
+    const reader = input instanceof BinaryReader ? input : new BinaryReader(input);
+    let end = length === undefined ? reader.len : reader.pos + length;
+    const message = createBaseTestAiConnectionRequest();
+    while (reader.pos < end) {
+      const tag = reader.uint32();
+      switch (tag >>> 3) {
+        case 1: {
+          if (tag !== 10) {
+            break;
+          }
+
+          message.baseUrl = reader.string();
+          continue;
+        }
+        case 2: {
+          if (tag !== 18) {
+            break;
+          }
+
+          message.apiKey = reader.string();
+          continue;
+        }
+        case 3: {
+          if (tag !== 26) {
+            break;
+          }
+
+          message.model = reader.string();
+          continue;
+        }
+        case 4: {
+          if (tag !== 32) {
+            break;
+          }
+
+          message.timeoutSeconds = reader.int32();
+          continue;
+        }
+      }
+      if ((tag & 7) === 4 || tag === 0) {
+        break;
+      }
+      reader.skip(tag & 7);
+    }
+    return message;
+  },
+
+  create(base?: DeepPartial<TestAiConnectionRequest>): TestAiConnectionRequest {
+    return TestAiConnectionRequest.fromPartial(base ?? {});
+  },
+  fromPartial(object: DeepPartial<TestAiConnectionRequest>): TestAiConnectionRequest {
+    const message = createBaseTestAiConnectionRequest();
+    message.baseUrl = object.baseUrl ?? "";
+    message.apiKey = object.apiKey ?? "";
+    message.model = object.model ?? "";
+    message.timeoutSeconds = object.timeoutSeconds ?? 0;
+    return message;
+  },
+};
+
+function createBaseTestAiConnectionResponse(): TestAiConnectionResponse {
+  return { success: false, message: "", modelInfo: "" };
+}
+
+export const TestAiConnectionResponse: MessageFns<TestAiConnectionResponse> = {
+  encode(message: TestAiConnectionResponse, writer: BinaryWriter = new BinaryWriter()): BinaryWriter {
+    if (message.success !== false) {
+      writer.uint32(8).bool(message.success);
+    }
+    if (message.message !== "") {
+      writer.uint32(18).string(message.message);
+    }
+    if (message.modelInfo !== "") {
+      writer.uint32(26).string(message.modelInfo);
+    }
+    return writer;
+  },
+
+  decode(input: BinaryReader | Uint8Array, length?: number): TestAiConnectionResponse {
+    const reader = input instanceof BinaryReader ? input : new BinaryReader(input);
+    let end = length === undefined ? reader.len : reader.pos + length;
+    const message = createBaseTestAiConnectionResponse();
+    while (reader.pos < end) {
+      const tag = reader.uint32();
+      switch (tag >>> 3) {
+        case 1: {
+          if (tag !== 8) {
+            break;
+          }
+
+          message.success = reader.bool();
+          continue;
+        }
+        case 2: {
+          if (tag !== 18) {
+            break;
+          }
+
+          message.message = reader.string();
+          continue;
+        }
+        case 3: {
+          if (tag !== 26) {
+            break;
+          }
+
+          message.modelInfo = reader.string();
+          continue;
+        }
+      }
+      if ((tag & 7) === 4 || tag === 0) {
+        break;
+      }
+      reader.skip(tag & 7);
+    }
+    return message;
+  },
+
+  create(base?: DeepPartial<TestAiConnectionResponse>): TestAiConnectionResponse {
+    return TestAiConnectionResponse.fromPartial(base ?? {});
+  },
+  fromPartial(object: DeepPartial<TestAiConnectionResponse>): TestAiConnectionResponse {
+    const message = createBaseTestAiConnectionResponse();
+    message.success = object.success ?? false;
+    message.message = object.message ?? "";
+    message.modelInfo = object.modelInfo ?? "";
+    return message;
+  },
+};
+
 export type WorkspaceServiceDefinition = typeof WorkspaceServiceDefinition;
 export const WorkspaceServiceDefinition = {
   name: "WorkspaceService",
@@ -1487,6 +1849,137 @@ export const WorkspaceServiceDefinition = {
         },
       },
     },
+    /** Gets the default system prompt for AI tag recommendations. */
+    getDefaultTagRecommendationPrompt: {
+      name: "GetDefaultTagRecommendationPrompt",
+      requestType: GetDefaultTagRecommendationPromptRequest,
+      requestStream: false,
+      responseType: GetDefaultTagRecommendationPromptResponse,
+      responseStream: false,
+      options: {
+        _unknownFields: {
+          578365826: [
+            new Uint8Array([
+              56,
+              18,
+              54,
+              47,
+              97,
+              112,
+              105,
+              47,
+              118,
+              49,
+              47,
+              119,
+              111,
+              114,
+              107,
+              115,
+              112,
+              97,
+              99,
+              101,
+              47,
+              97,
+              105,
+              47,
+              116,
+              97,
+              103,
+              45,
+              114,
+              101,
+              99,
+              111,
+              109,
+              109,
+              101,
+              110,
+              100,
+              97,
+              116,
+              105,
+              111,
+              110,
+              47,
+              100,
+              101,
+              102,
+              97,
+              117,
+              108,
+              116,
+              45,
+              112,
+              114,
+              111,
+              109,
+              112,
+              116,
+            ]),
+          ],
+        },
+      },
+    },
+    /** Tests AI API connection and configuration. */
+    testAiConnection: {
+      name: "TestAiConnection",
+      requestType: TestAiConnectionRequest,
+      requestStream: false,
+      responseType: TestAiConnectionResponse,
+      responseStream: false,
+      options: {
+        _unknownFields: {
+          578365826: [
+            new Uint8Array([
+              41,
+              58,
+              1,
+              42,
+              34,
+              36,
+              47,
+              97,
+              112,
+              105,
+              47,
+              118,
+              49,
+              47,
+              119,
+              111,
+              114,
+              107,
+              115,
+              112,
+              97,
+              99,
+              101,
+              47,
+              97,
+              105,
+              47,
+              116,
+              101,
+              115,
+              116,
+              45,
+              99,
+              111,
+              110,
+              110,
+              101,
+              99,
+              116,
+              105,
+              111,
+              110,
+            ]),
+          ],
+        },
+      },
+    },
   },
 } as const;