diff --git a/.github/import_generation.txt b/.github/import_generation.txt
index 98d9bcb75a6..3c032078a4a 100644
--- a/.github/import_generation.txt
+++ b/.github/import_generation.txt
@@ -1 +1 @@
-17
+18
diff --git a/.github/last_commit.txt b/.github/last_commit.txt
index 38a9334ad0c..35b62492122 100644
--- a/.github/last_commit.txt
+++ b/.github/last_commit.txt
@@ -1 +1 @@
-ca39c1dc5e3592adab111f61e4aaec2021bfa95b
+cdad0889aa2f47f9cde997deae6f682eced20873
diff --git a/.github/workflows/examples.yaml b/.github/workflows/examples.yaml
index 08920ddf7b9..5d0f38651b4 100644
--- a/.github/workflows/examples.yaml
+++ b/.github/workflows/examples.yaml
@@ -5,6 +5,7 @@ on:
     branches:
       - main
   pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
     branches:
       - main
 concurrency:
diff --git a/.github/workflows/import.yaml b/.github/workflows/import.yaml
index b4fc76c5c87..d1fe9f00746 100644
--- a/.github/workflows/import.yaml
+++ b/.github/workflows/import.yaml
@@ -80,6 +80,7 @@ jobs:
             --base ${{ github.ref_name }} \
             --head import-pr-$GENERATION \
             --title "Import YDB C++ SDK $GENERATION" \
-            --body "Automatic import of new commits from ydb repository"
+            --body "Automatic import of new commits from ydb repository" \
+            --draft
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index a8ac3eb3373..c9c7bad9f9a 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -5,6 +5,7 @@ on:
     branches:
       - main
   pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
     branches:
       - main
 concurrency:
@@ -116,4 +117,4 @@ jobs:
     - name: Test
       shell: bash
       run: |
-        YDB_VERSION=${{ matrix.ydb-version }} ctest -j$(nproc) --preset integration
+        YDB_VERSION=${{ matrix.ydb-version }} ctest -j2 --preset integration
diff --git a/include/ydb-cpp-sdk/client/proto/accessor.h b/include/ydb-cpp-sdk/client/proto/accessor.h
index 313321176b5..bfa6f02e7b9 100644
--- a/include/ydb-cpp-sdk/client/proto/accessor.h
+++ b/include/ydb-cpp-sdk/client/proto/accessor.h
@@ -1,7 +1,5 @@
 #pragma once
 
-#include "private.h"
-
 #include <src/api/protos/ydb_coordination.pb.h>
 #include <src/api/protos/ydb_export.pb.h>
 #include <src/api/protos/ydb_import.pb.h>
@@ -52,10 +50,6 @@ class TProtoAccessor {
     static const Ydb::Monitoring::SelfCheckResult& GetProto(const NYdb::NMonitoring::TSelfCheckResult& selfCheckResult);
     static const Ydb::Coordination::DescribeNodeResult& GetProto(const NYdb::NCoordination::TNodeDescription& describeNodeResult);
     static const Ydb::Import::ListObjectsInS3ExportResult& GetProto(const NYdb::NImport::TListObjectsInS3ExportResult& result);
-#ifdef YDB_SDK_INTERNAL_CLIENTS
-    static const Ydb::Replication::DescribeReplicationResult& GetProto(const NYdb::NReplication::TDescribeReplicationResult& desc);
-    static const Ydb::View::DescribeViewResult& GetProto(const NYdb::NView::TDescribeViewResult& desc);
-#endif
 
     static NTable::TQueryStats FromProto(const Ydb::TableStats::QueryStats& queryStats);
     static NTable::TTableDescription FromProto(const Ydb::Table::CreateTableRequest& request);
diff --git a/include/ydb-cpp-sdk/client/scheme/scheme.h b/include/ydb-cpp-sdk/client/scheme/scheme.h
index 6cb842200f9..f4bede6f1e1 100644
--- a/include/ydb-cpp-sdk/client/scheme/scheme.h
+++ b/include/ydb-cpp-sdk/client/scheme/scheme.h
@@ -51,6 +51,7 @@ enum class ESchemeEntryType : i32 {
     View = 20,
     ResourcePool = 21,
     SysView = 22,
+    Transfer = 23,
 };
 
 struct TVirtualTimestamp {
diff --git a/include/ydb-cpp-sdk/client/value/value.h b/include/ydb-cpp-sdk/client/value/value.h
index b47748439c7..38f22f1d06a 100644
--- a/include/ydb-cpp-sdk/client/value/value.h
+++ b/include/ydb-cpp-sdk/client/value/value.h
@@ -4,6 +4,8 @@
 
 #include <util/datetime/base.h>
 
+#include <google/protobuf/arena.h>
+
 #include <optional>
 #include <memory>
 
@@ -528,7 +530,7 @@ class TValueBuilderBase : public TMoveOnly {
 protected:
     TValueBuilderBase(TValueBuilderBase&&);
 
-    TValueBuilderBase();
+    TValueBuilderBase(google::protobuf::Arena* arena = nullptr);
 
     TValueBuilderBase(const TType& type);
 
@@ -544,7 +546,7 @@ class TValueBuilderBase : public TMoveOnly {
 
 class TValueBuilder : public TValueBuilderBase<TValueBuilder> {
 public:
-    TValueBuilder();
+    TValueBuilder(google::protobuf::Arena* arena = nullptr);
 
     TValueBuilder(const TType& type);
 
diff --git a/src/api/grpc/draft/ydb_replication_v1.proto b/src/api/grpc/draft/ydb_replication_v1.proto
index f8868727955..ab1209868a4 100644
--- a/src/api/grpc/draft/ydb_replication_v1.proto
+++ b/src/api/grpc/draft/ydb_replication_v1.proto
@@ -7,4 +7,5 @@ option java_package = "com.yandex.ydb.replication.v1";
 
 service ReplicationService {
     rpc DescribeReplication(Replication.DescribeReplicationRequest) returns (Replication.DescribeReplicationResponse);
+    rpc DescribeTransfer(Replication.DescribeTransferRequest) returns (Replication.DescribeTransferResponse);
 }
diff --git a/src/api/protos/draft/ydb_replication.proto b/src/api/protos/draft/ydb_replication.proto
index 4ef82408e61..62106c4d027 100644
--- a/src/api/protos/draft/ydb_replication.proto
+++ b/src/api/protos/draft/ydb_replication.proto
@@ -97,3 +97,52 @@ message DescribeReplicationResult {
     }
 }
 
+message DescribeTransferRequest {
+    Ydb.Operations.OperationParams operation_params = 1;
+    // Replication path.
+    string path = 2 [(required) = true];
+}
+
+message DescribeTransferResponse {
+    // Result of request will be inside operation.
+    Ydb.Operations.Operation operation = 1;
+}
+
+message DescribeTransferResult {
+    message RunningState {
+    }
+
+    message ErrorState {
+        repeated Ydb.Issue.IssueMessage issues = 1;
+    }
+
+    message DoneState {
+    }
+
+    message PausedState {
+    }
+
+    // Description of scheme object.
+    Ydb.Scheme.Entry self = 1;
+
+    ConnectionParams connection_params = 2;
+
+    oneof state {
+        RunningState running = 3;
+        ErrorState error = 4;
+        DoneState done = 5;
+        PausedState paused = 6;
+    }
+
+    string source_path = 7;
+    string destination_path = 8;
+    string transformation_lambda = 9;
+    string consumer_name = 10;
+
+    message BatchSettings {
+        optional uint64 size_bytes = 1;
+        google.protobuf.Duration flush_interval = 2;
+    }
+
+    optional BatchSettings batch_settings = 11;
+}
diff --git a/src/client/impl/ydb_internal/retry/retry_async.h b/src/client/impl/ydb_internal/retry/retry_async.h
index f19a0bf3371..e4a26f02fb6 100644
--- a/src/client/impl/ydb_internal/retry/retry_async.h
+++ b/src/client/impl/ydb_internal/retry/retry_async.h
@@ -114,7 +114,6 @@ class TRetryWithoutSession : public TRetryContext<TClient, TAsyncStatusType> {
 template <typename TClient, typename TOperation, typename TAsyncStatusType = TFunctionResult<TOperation>>
 class TRetryWithSession : public TRetryContext<TClient, TAsyncStatusType> {
     using TRetryContextAsync = TRetryContext<TClient, TAsyncStatusType>;
-    using TPtr = typename TRetryContextAsync::TPtr;
     using TStatusType = typename TRetryContextAsync::TStatusType;
     using TSession = typename TClient::TSession;
     using TCreateSessionSettings = typename TClient::TCreateSessionSettings;
@@ -132,7 +131,7 @@ class TRetryWithSession : public TRetryContext<TClient, TAsyncStatusType> {
     {}
 
     void Retry() override {
-        TPtr self(this);
+        TIntrusivePtr<TRetryWithSession> self(this);
         if (!Session_) {
             auto settings = TCreateSessionSettings().ClientTimeout(this->Settings_.GetSessionClientTimeout_);
             this->Client_.GetSession(settings).Subscribe(
@@ -143,9 +142,8 @@ class TRetryWithSession : public TRetryContext<TClient, TAsyncStatusType> {
                             return TRetryContextAsync::HandleStatusAsync(self, TStatusType(TStatus(result)));
                         }
 
-                        auto* myself = dynamic_cast<TRetryWithSession*>(self.Get());
-                        myself->Session_ = result.GetSession();
-                        myself->DoRunOperation(self);
+                        self->Session_ = result.GetSession();
+                        self->DoRunOperation(self);
                     } catch (...) {
                         return TRetryContextAsync::HandleExceptionAsync(self, std::current_exception());
                     }
diff --git a/src/client/query/client.cpp b/src/client/query/client.cpp
index ff7ccee5bd3..4423e2013d1 100644
--- a/src/client/query/client.cpp
+++ b/src/client/query/client.cpp
@@ -858,8 +858,8 @@ class TTransaction::TImpl : public std::enable_shared_from_this<TImpl> {
 
 private:
     bool ChangesAreAccepted = true; // haven't called Commit or Rollback yet
-    std::vector<TPrecommitTransactionCallback> PrecommitCallbacks;
-    std::vector<TOnFailureTransactionCallback> OnFailureCallbacks;
+    mutable std::vector<TPrecommitTransactionCallback> PrecommitCallbacks;
+    mutable std::vector<TOnFailureTransactionCallback> OnFailureCallbacks;
 
     std::mutex PrecommitCallbacksMutex;
     std::mutex OnFailureCallbacksMutex;
diff --git a/src/client/scheme/scheme.cpp b/src/client/scheme/scheme.cpp
index 713db1b33c4..faabbf61f9e 100644
--- a/src/client/scheme/scheme.cpp
+++ b/src/client/scheme/scheme.cpp
@@ -111,6 +111,8 @@ static ESchemeEntryType ConvertProtoEntryType(::Ydb::Scheme::Entry::Type entry)
         return ESchemeEntryType::ResourcePool;
     case ::Ydb::Scheme::Entry::SYS_VIEW:
         return ESchemeEntryType::SysView;
+    case ::Ydb::Scheme::Entry::TRANSFER:
+        return ESchemeEntryType::Transfer;
     default:
         return ESchemeEntryType::Unknown;
     }
diff --git a/src/client/table/table.cpp b/src/client/table/table.cpp
index 24f84147f87..0072d9c88d0 100644
--- a/src/client/table/table.cpp
+++ b/src/client/table/table.cpp
@@ -2508,7 +2508,7 @@ TIndexDescription TIndexDescription::FromProto(const TProto& proto) {
     std::vector<std::string> indexColumns;
     std::vector<std::string> dataColumns;
     std::vector<TGlobalIndexSettings> globalIndexSettings;
-    std::variant<std::monostate, TKMeansTreeSettings> specializedIndexSettings;
+    std::variant<std::monostate, TKMeansTreeSettings> specializedIndexSettings = std::monostate{};
 
     indexColumns.assign(proto.index_columns().begin(), proto.index_columns().end());
     dataColumns.assign(proto.data_columns().begin(), proto.data_columns().end());
diff --git a/src/client/topic/impl/direct_reader.cpp b/src/client/topic/impl/direct_reader.cpp
index ce3b6e9a940..7e84cd0ea50 100644
--- a/src/client/topic/impl/direct_reader.cpp
+++ b/src/client/topic/impl/direct_reader.cpp
@@ -4,7 +4,7 @@
 #include <src/api/grpc/ydb_topic_v1.grpc.pb.h>
 
 
-namespace NYdb::NTopic {
+namespace NYdb::inline V3::NTopic {
 
 TDirectReadClientMessage TDirectReadPartitionSession::MakeStartRequest() const {
     TDirectReadClientMessage req;
diff --git a/src/client/topic/impl/direct_reader.h b/src/client/topic/impl/direct_reader.h
index 2b2058537e6..2a25df56b4c 100644
--- a/src/client/topic/impl/direct_reader.h
+++ b/src/client/topic/impl/direct_reader.h
@@ -10,7 +10,7 @@
 #include <util/thread/lfqueue.h>
 
 
-namespace NYdb::NTopic {
+namespace NYdb::inline V3::NTopic {
 
 template <bool UseMigrationProtocol>
 class TDeferredActions;
diff --git a/src/client/topic/impl/read_session_impl.h b/src/client/topic/impl/read_session_impl.h
index 51531a52072..5855780b6bf 100644
--- a/src/client/topic/impl/read_session_impl.h
+++ b/src/client/topic/impl/read_session_impl.h
@@ -1111,7 +1111,7 @@ struct THash<NYdb::NTopic::TPartitionStreamImpl<true>::TKey> {
     }
 };
 
-namespace NYdb::NTopic {
+namespace NYdb::inline V3::NTopic {
 
 // Read session for single cluster.
 // This class holds only read session logic.
diff --git a/src/client/topic/impl/read_session_impl.ipp b/src/client/topic/impl/read_session_impl.ipp
index f4c2f8518fe..72293e5da9b 100644
--- a/src/client/topic/impl/read_session_impl.ipp
+++ b/src/client/topic/impl/read_session_impl.ipp
@@ -2183,6 +2183,9 @@ void TSingleClusterReadSessionImpl<UseMigrationProtocol>::TrySubscribeOnTransact
             return;
         }
 
+        txInfo->IsActive = true;
+        txInfo->Subscribed = true;
+
         auto callback = [cbContext = this->SelfContext, txId, txInfo, consumer = Settings.ConsumerName_, client]() {
             std::vector<TTopicOffsets> offsets;
 
@@ -2205,9 +2208,6 @@ void TSingleClusterReadSessionImpl<UseMigrationProtocol>::TrySubscribeOnTransact
         };
 
         tx.AddPrecommitCallback(std::move(callback));
-
-        txInfo->IsActive = true;
-        txInfo->Subscribed = true;
     }
 }
 
diff --git a/src/client/topic/impl/write_session_impl.cpp b/src/client/topic/impl/write_session_impl.cpp
index 55bc19178e8..774bf0c1302 100644
--- a/src/client/topic/impl/write_session_impl.cpp
+++ b/src/client/topic/impl/write_session_impl.cpp
@@ -554,31 +554,31 @@ void TWriteSessionImpl::TrySubscribeOnTransactionCommit(TTransactionBase* tx)
         txInfo->IsActive = true;
         txInfo->Subscribed = true;
         txInfo->AllAcksReceived = NThreading::NewPromise<TStatus>();
-    }
 
-    auto callback = [cbContext = this->SelfContext, txId, txInfo]() {
-        with_lock(txInfo->Lock) {
-            Y_ABORT_UNLESS(!txInfo->CommitCalled);
+        auto callback = [cbContext = this->SelfContext, txId, txInfo]() {
+            with_lock(txInfo->Lock) {
+                Y_ABORT_UNLESS(!txInfo->CommitCalled);
 
-            txInfo->CommitCalled = true;
+                txInfo->CommitCalled = true;
 
-            if (txInfo->WriteCount == txInfo->AckCount) {
-                txInfo->AllAcksReceived.SetValue(MakeCommitTransactionSuccess());
-                if (auto self = cbContext->LockShared()) {
-                    self->DeleteTx(txId);
+                if (txInfo->WriteCount == txInfo->AckCount) {
+                    txInfo->AllAcksReceived.SetValue(MakeCommitTransactionSuccess());
+                    if (auto self = cbContext->LockShared()) {
+                        self->DeleteTx(txId);
+                    }
+                    return txInfo->AllAcksReceived.GetFuture();
                 }
-                return txInfo->AllAcksReceived.GetFuture();
-            }
 
-            if (txInfo->IsActive) {
-                return txInfo->AllAcksReceived.GetFuture();
+                if (txInfo->IsActive) {
+                    return txInfo->AllAcksReceived.GetFuture();
+                }
             }
-        }
 
-        return NThreading::MakeFuture(MakeSessionExpiredError());
-    };
+            return NThreading::MakeFuture(MakeSessionExpiredError());
+        };
 
-    tx->AddPrecommitCallback(std::move(callback));
+        tx->AddPrecommitCallback(std::move(callback));
+    }
 }
 
 void TWriteSessionImpl::TrySignalAllAcksReceived(ui64 seqNo)
diff --git a/src/client/value/value.cpp b/src/client/value/value.cpp
index 4041b66609c..c00f007eabc 100644
--- a/src/client/value/value.cpp
+++ b/src/client/value/value.cpp
@@ -2061,12 +2061,24 @@ class TValueBuilderImpl {
 public:
     TValueBuilderImpl()
         : TypeBuilder_()
+        , Arena(nullptr)
+        , ProtoValue_(ProtoValueHeap)
+    {
+        PushPath(ProtoValue_);
+    }
+
+    TValueBuilderImpl(google::protobuf::Arena* arena)
+        : TypeBuilder_()
+        , Arena(arena)
+        , ProtoValue_(*google::protobuf::Arena::CreateMessage<Ydb::Value>(Arena))
     {
         PushPath(ProtoValue_);
     }
 
     TValueBuilderImpl(const TType& type)
         : TypeBuilder_()
+        , Arena(nullptr)
+        , ProtoValue_(ProtoValueHeap)
     {
         PushPath(ProtoValue_);
         GetType().CopyFrom(type.GetProto());
@@ -2074,6 +2086,8 @@ class TValueBuilderImpl {
 
     TValueBuilderImpl(Ydb::Type& type, Ydb::Value& value)
         : TypeBuilder_(type)
+        , Arena(nullptr)
+        , ProtoValue_(ProtoValueHeap)
     {
         PushPath(value);
     }
@@ -2088,10 +2102,15 @@ class TValueBuilderImpl {
     TValue BuildValue() {
         CheckValue();
 
-        Ydb::Value value;
-        value.Swap(&ProtoValue_);
-
-        return TValue(TypeBuilder_.Build(), std::move(value));
+        if (Arena) {
+            auto* value = google::protobuf::Arena::CreateMessage<Ydb::Value>(Arena);
+            value->Swap(&ProtoValue_);
+            return TValue(TypeBuilder_.Build(), value);
+        } else {
+            Ydb::Value value;
+            value.Swap(&ProtoValue_);
+            return TValue(TypeBuilder_.Build(), std::move(value));
+        }
     }
 
     void Bool(bool value) {
@@ -2803,7 +2822,12 @@ class TValueBuilderImpl {
 private:
     //TTypeBuilder TypeBuilder_;
     TTypeBuilder::TImpl TypeBuilder_;
-    Ydb::Value ProtoValue_;
+    google::protobuf::Arena* Arena;
+    Ydb::Value ProtoValueHeap;
+
+    // either ProtoValueHeap or a reference to the arena allocated protobuf
+    Ydb::Value& ProtoValue_;
+
     std::map<const Ydb::StructType*, TMembersMap> StructsMap_;
 
     TStackVec<TProtoPosition, 8> Path_;
@@ -2819,8 +2843,8 @@ template<typename TDerived>
 TValueBuilderBase<TDerived>::~TValueBuilderBase() = default;
 
 template<typename TDerived>
-TValueBuilderBase<TDerived>::TValueBuilderBase()
-    : Impl_(new TValueBuilderImpl()) {}
+TValueBuilderBase<TDerived>::TValueBuilderBase(google::protobuf::Arena* arena)
+    : Impl_(new TValueBuilderImpl(arena)) {}
 
 template<typename TDerived>
 TValueBuilderBase<TDerived>::TValueBuilderBase(const TType& type)
@@ -3382,8 +3406,8 @@ template class TValueBuilderBase<TParamValueBuilder>;
 
 ////////////////////////////////////////////////////////////////////////////////
 
-TValueBuilder::TValueBuilder()
-    : TValueBuilderBase() {}
+TValueBuilder::TValueBuilder(google::protobuf::Arena* arena)
+    : TValueBuilderBase(arena) {}
 
 TValueBuilder::TValueBuilder(const TType& type)
     : TValueBuilderBase(type) {}
diff --git a/tests/integration/topic/topic_to_table.cpp b/tests/integration/topic/topic_to_table.cpp
index af411e2cb4c..be83486bb16 100644
--- a/tests/integration/topic/topic_to_table.cpp
+++ b/tests/integration/topic/topic_to_table.cpp
@@ -1335,9 +1335,6 @@ void TxUsage::TestWriteToTopic10()
 
 void TxUsage::TestWriteToTopic26()
 {
-    // TODO(brgayazov): fix test
-    GTEST_SKIP() << "Test is flaky";
-
     //
     // the test verifies a transaction in which data is read from a partition of one topic and written to
     // another partition of this topic
@@ -1723,9 +1720,6 @@ TEST_F(TxUsageQuery, TEST_NAME(WriteToTopic_Demo_17))
 
 void TxUsage::TestWriteToTopic25()
 {
-    // TODO(brgayazov): fix test
-    GTEST_SKIP() << "Test is flaky";
-
     //
     // the test verifies a transaction in which data is read from one topic and written to another
     //