diff --git a/settings.pb.go b/settings.pb.go
new file mode 100644
index 0000000..909cc53
--- /dev/null
+++ b/settings.pb.go
@@ -0,0 +1,243 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.11
+// 	protoc        v7.34.0
+// source: settings.proto
+
+package proto
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	emptypb "google.golang.org/protobuf/types/known/emptypb"
+	reflect "reflect"
+	sync "sync"
+	unsafe "unsafe"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type GetPreferredModelRequest struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	UserId        int64                  `protobuf:"varint,1,opt,name=user_id,json=userId,proto3" json:"user_id,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *GetPreferredModelRequest) Reset() {
+	*x = GetPreferredModelRequest{}
+	mi := &file_settings_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *GetPreferredModelRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetPreferredModelRequest) ProtoMessage() {}
+
+func (x *GetPreferredModelRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_settings_proto_msgTypes[0]
+	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 GetPreferredModelRequest.ProtoReflect.Descriptor instead.
+func (*GetPreferredModelRequest) Descriptor() ([]byte, []int) {
+	return file_settings_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *GetPreferredModelRequest) GetUserId() int64 {
+	if x != nil {
+		return x.UserId
+	}
+	return 0
+}
+
+type GetPreferredModelResponse struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Model         string                 `protobuf:"bytes,1,opt,name=model,proto3" json:"model,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *GetPreferredModelResponse) Reset() {
+	*x = GetPreferredModelResponse{}
+	mi := &file_settings_proto_msgTypes[1]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *GetPreferredModelResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetPreferredModelResponse) ProtoMessage() {}
+
+func (x *GetPreferredModelResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_settings_proto_msgTypes[1]
+	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 GetPreferredModelResponse.ProtoReflect.Descriptor instead.
+func (*GetPreferredModelResponse) Descriptor() ([]byte, []int) {
+	return file_settings_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *GetPreferredModelResponse) GetModel() string {
+	if x != nil {
+		return x.Model
+	}
+	return ""
+}
+
+type SetPreferredModelRequest struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	UserId        int64                  `protobuf:"varint,1,opt,name=user_id,json=userId,proto3" json:"user_id,omitempty"`
+	Username      string                 `protobuf:"bytes,2,opt,name=username,proto3" json:"username,omitempty"`
+	Model         string                 `protobuf:"bytes,3,opt,name=model,proto3" json:"model,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *SetPreferredModelRequest) Reset() {
+	*x = SetPreferredModelRequest{}
+	mi := &file_settings_proto_msgTypes[2]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *SetPreferredModelRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*SetPreferredModelRequest) ProtoMessage() {}
+
+func (x *SetPreferredModelRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_settings_proto_msgTypes[2]
+	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 SetPreferredModelRequest.ProtoReflect.Descriptor instead.
+func (*SetPreferredModelRequest) Descriptor() ([]byte, []int) {
+	return file_settings_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *SetPreferredModelRequest) GetUserId() int64 {
+	if x != nil {
+		return x.UserId
+	}
+	return 0
+}
+
+func (x *SetPreferredModelRequest) GetUsername() string {
+	if x != nil {
+		return x.Username
+	}
+	return ""
+}
+
+func (x *SetPreferredModelRequest) GetModel() string {
+	if x != nil {
+		return x.Model
+	}
+	return ""
+}
+
+var File_settings_proto protoreflect.FileDescriptor
+
+const file_settings_proto_rawDesc = "" +
+	"\n" +
+	"\x0esettings.proto\x12\x05users\x1a\x1bgoogle/protobuf/empty.proto\"3\n" +
+	"\x18GetPreferredModelRequest\x12\x17\n" +
+	"\auser_id\x18\x01 \x01(\x03R\x06userId\"1\n" +
+	"\x19GetPreferredModelResponse\x12\x14\n" +
+	"\x05model\x18\x01 \x01(\tR\x05model\"e\n" +
+	"\x18SetPreferredModelRequest\x12\x17\n" +
+	"\auser_id\x18\x01 \x01(\x03R\x06userId\x12\x1a\n" +
+	"\busername\x18\x02 \x01(\tR\busername\x12\x14\n" +
+	"\x05model\x18\x03 \x01(\tR\x05model2\xbb\x01\n" +
+	"\x13UserSettingsService\x12V\n" +
+	"\x11GetPreferredModel\x12\x1f.users.GetPreferredModelRequest\x1a .users.GetPreferredModelResponse\x12L\n" +
+	"\x11SetPreferredModel\x12\x1f.users.SetPreferredModelRequest\x1a\x16.google.protobuf.EmptyB,Z*git.be.kaien.ru/l-ai/l-ai-core-proto/protob\x06proto3"
+
+var (
+	file_settings_proto_rawDescOnce sync.Once
+	file_settings_proto_rawDescData []byte
+)
+
+func file_settings_proto_rawDescGZIP() []byte {
+	file_settings_proto_rawDescOnce.Do(func() {
+		file_settings_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_settings_proto_rawDesc), len(file_settings_proto_rawDesc)))
+	})
+	return file_settings_proto_rawDescData
+}
+
+var file_settings_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
+var file_settings_proto_goTypes = []any{
+	(*GetPreferredModelRequest)(nil),  // 0: users.GetPreferredModelRequest
+	(*GetPreferredModelResponse)(nil), // 1: users.GetPreferredModelResponse
+	(*SetPreferredModelRequest)(nil),  // 2: users.SetPreferredModelRequest
+	(*emptypb.Empty)(nil),             // 3: google.protobuf.Empty
+}
+var file_settings_proto_depIdxs = []int32{
+	0, // 0: users.UserSettingsService.GetPreferredModel:input_type -> users.GetPreferredModelRequest
+	2, // 1: users.UserSettingsService.SetPreferredModel:input_type -> users.SetPreferredModelRequest
+	1, // 2: users.UserSettingsService.GetPreferredModel:output_type -> users.GetPreferredModelResponse
+	3, // 3: users.UserSettingsService.SetPreferredModel:output_type -> google.protobuf.Empty
+	2, // [2:4] is the sub-list for method output_type
+	0, // [0:2] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_settings_proto_init() }
+func file_settings_proto_init() {
+	if File_settings_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_settings_proto_rawDesc), len(file_settings_proto_rawDesc)),
+			NumEnums:      0,
+			NumMessages:   3,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_settings_proto_goTypes,
+		DependencyIndexes: file_settings_proto_depIdxs,
+		MessageInfos:      file_settings_proto_msgTypes,
+	}.Build()
+	File_settings_proto = out.File
+	file_settings_proto_goTypes = nil
+	file_settings_proto_depIdxs = nil
+}
diff --git a/settings.proto b/settings.proto
new file mode 100644
index 0000000..8c81557
--- /dev/null
+++ b/settings.proto
@@ -0,0 +1,27 @@
+syntax = "proto3";
+
+package users;
+
+option go_package = "git.be.kaien.ru/l-ai/l-ai-core-proto/proto";
+
+import "google/protobuf/empty.proto";
+
+// UserSettingsService manages per-user bot settings
+service UserSettingsService {
+  rpc GetPreferredModel(GetPreferredModelRequest) returns (GetPreferredModelResponse);
+  rpc SetPreferredModel(SetPreferredModelRequest) returns (google.protobuf.Empty);
+}
+
+message GetPreferredModelRequest {
+  int64 user_id = 1;
+}
+
+message GetPreferredModelResponse {
+  string model = 1;
+}
+
+message SetPreferredModelRequest {
+  int64 user_id = 1;
+  string username = 2;
+  string model = 3;
+}
diff --git a/settings_grpc.pb.go b/settings_grpc.pb.go
new file mode 100644
index 0000000..9ce4b75
--- /dev/null
+++ b/settings_grpc.pb.go
@@ -0,0 +1,164 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-grpc v1.6.1
+// - protoc             v7.34.0
+// source: settings.proto
+
+package proto
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+	emptypb "google.golang.org/protobuf/types/known/emptypb"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+// Requires gRPC-Go v1.64.0 or later.
+const _ = grpc.SupportPackageIsVersion9
+
+const (
+	UserSettingsService_GetPreferredModel_FullMethodName = "/users.UserSettingsService/GetPreferredModel"
+	UserSettingsService_SetPreferredModel_FullMethodName = "/users.UserSettingsService/SetPreferredModel"
+)
+
+// UserSettingsServiceClient is the client API for UserSettingsService service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+//
+// UserSettingsService manages per-user bot settings
+type UserSettingsServiceClient interface {
+	GetPreferredModel(ctx context.Context, in *GetPreferredModelRequest, opts ...grpc.CallOption) (*GetPreferredModelResponse, error)
+	SetPreferredModel(ctx context.Context, in *SetPreferredModelRequest, opts ...grpc.CallOption) (*emptypb.Empty, error)
+}
+
+type userSettingsServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewUserSettingsServiceClient(cc grpc.ClientConnInterface) UserSettingsServiceClient {
+	return &userSettingsServiceClient{cc}
+}
+
+func (c *userSettingsServiceClient) GetPreferredModel(ctx context.Context, in *GetPreferredModelRequest, opts ...grpc.CallOption) (*GetPreferredModelResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(GetPreferredModelResponse)
+	err := c.cc.Invoke(ctx, UserSettingsService_GetPreferredModel_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *userSettingsServiceClient) SetPreferredModel(ctx context.Context, in *SetPreferredModelRequest, opts ...grpc.CallOption) (*emptypb.Empty, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(emptypb.Empty)
+	err := c.cc.Invoke(ctx, UserSettingsService_SetPreferredModel_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// UserSettingsServiceServer is the server API for UserSettingsService service.
+// All implementations must embed UnimplementedUserSettingsServiceServer
+// for forward compatibility.
+//
+// UserSettingsService manages per-user bot settings
+type UserSettingsServiceServer interface {
+	GetPreferredModel(context.Context, *GetPreferredModelRequest) (*GetPreferredModelResponse, error)
+	SetPreferredModel(context.Context, *SetPreferredModelRequest) (*emptypb.Empty, error)
+	mustEmbedUnimplementedUserSettingsServiceServer()
+}
+
+// UnimplementedUserSettingsServiceServer must be embedded to have
+// forward compatible implementations.
+//
+// NOTE: this should be embedded by value instead of pointer to avoid a nil
+// pointer dereference when methods are called.
+type UnimplementedUserSettingsServiceServer struct{}
+
+func (UnimplementedUserSettingsServiceServer) GetPreferredModel(context.Context, *GetPreferredModelRequest) (*GetPreferredModelResponse, error) {
+	return nil, status.Error(codes.Unimplemented, "method GetPreferredModel not implemented")
+}
+func (UnimplementedUserSettingsServiceServer) SetPreferredModel(context.Context, *SetPreferredModelRequest) (*emptypb.Empty, error) {
+	return nil, status.Error(codes.Unimplemented, "method SetPreferredModel not implemented")
+}
+func (UnimplementedUserSettingsServiceServer) mustEmbedUnimplementedUserSettingsServiceServer() {}
+func (UnimplementedUserSettingsServiceServer) testEmbeddedByValue()                             {}
+
+// UnsafeUserSettingsServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to UserSettingsServiceServer will
+// result in compilation errors.
+type UnsafeUserSettingsServiceServer interface {
+	mustEmbedUnimplementedUserSettingsServiceServer()
+}
+
+func RegisterUserSettingsServiceServer(s grpc.ServiceRegistrar, srv UserSettingsServiceServer) {
+	// If the following call panics, it indicates UnimplementedUserSettingsServiceServer was
+	// embedded by pointer and is nil.  This will cause panics if an
+	// unimplemented method is ever invoked, so we test this at initialization
+	// time to prevent it from happening at runtime later due to I/O.
+	if t, ok := srv.(interface{ testEmbeddedByValue() }); ok {
+		t.testEmbeddedByValue()
+	}
+	s.RegisterService(&UserSettingsService_ServiceDesc, srv)
+}
+
+func _UserSettingsService_GetPreferredModel_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetPreferredModelRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(UserSettingsServiceServer).GetPreferredModel(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: UserSettingsService_GetPreferredModel_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(UserSettingsServiceServer).GetPreferredModel(ctx, req.(*GetPreferredModelRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _UserSettingsService_SetPreferredModel_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(SetPreferredModelRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(UserSettingsServiceServer).SetPreferredModel(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: UserSettingsService_SetPreferredModel_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(UserSettingsServiceServer).SetPreferredModel(ctx, req.(*SetPreferredModelRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// UserSettingsService_ServiceDesc is the grpc.ServiceDesc for UserSettingsService service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var UserSettingsService_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "users.UserSettingsService",
+	HandlerType: (*UserSettingsServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "GetPreferredModel",
+			Handler:    _UserSettingsService_GetPreferredModel_Handler,
+		},
+		{
+			MethodName: "SetPreferredModel",
+			Handler:    _UserSettingsService_SetPreferredModel_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "settings.proto",
+}