diff --git a/test_grpc/grpc_server.go b/test_grpc/grpc_server.go
index 00e52d9..73b529e 100644
--- a/test_grpc/grpc_server.go
+++ b/test_grpc/grpc_server.go
@@ -22,11 +22,7 @@ func NewGRPCServer(kv *service.KVServer) *GRPCServer {
 
 func (s *GRPCServer) Put(ctx context.Context, req *PutRequest) (*PutResponse, error) {
 	cmd := service.Command{Type: "Put", Key: req.Key, Value: req.Value}
-	index, err := s.kv.AppendEntry(cmd)
-	if err != nil {
-		return &PutResponse{Success: false}, nil
-	}
-	if err := s.kv.WaitForCommit(index); err != nil {
+	if err := s.kv.Write(cmd); err != nil {
 		return &PutResponse{Success: false}, nil
 	}
 	return &PutResponse{Success: true}, nil
@@ -42,11 +38,7 @@ func (s *GRPCServer) Get(ctx context.Context, req *GetRequest) (*GetResponse, er
 
 func (s *GRPCServer) Delete(ctx context.Context, req *DeleteRequest) (*DeleteResponse, error) {
 	cmd := service.Command{Type: "Delete", Key: req.Key}
-	index, err := s.kv.AppendEntry(cmd)
-	if err != nil {
-		return &DeleteResponse{Success: false}, nil
-	}
-	if err := s.kv.WaitForCommit(index); err != nil {
+	if err := s.kv.Write(cmd); err != nil {
 		return &DeleteResponse{Success: false}, nil
 	}
 	return &DeleteResponse{Success: true}, nil
diff --git a/test_grpc/grpc_server_test.go b/test_grpc/grpc_server_test.go
new file mode 100644
index 0000000..20a2a89
--- /dev/null
+++ b/test_grpc/grpc_server_test.go
@@ -0,0 +1,43 @@
+package test_grpc
+
+import (
+	"context"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/NeverENG/BanDB/config"
+	"github.com/NeverENG/BanDB/service"
+)
+
+// TestGRPCServer_PutGetStandalone 锁定回归：standalone 模式下 KVServer.raft 为 nil，
+// gRPC 的 Put 走 kv.Write() 而非直接 AppendEntry，不再 nil 指针 panic。
+func TestGRPCServer_PutGetStandalone(t *testing.T) {
+	oldMode := config.G.Mode
+	oldWAL := config.G.WALPath
+	config.G.Mode = config.ModeStandalone
+	config.G.WALPath = "test_grpc_wal_" + time.Now().Format("20060102150405.000000") + ".log"
+	t.Cleanup(func() {
+		os.Remove(config.G.WALPath)
+		config.G.Mode = oldMode
+		config.G.WALPath = oldWAL
+	})
+
+	srv := NewGRPCServer(service.NewKVServer())
+
+	putResp, err := srv.Put(context.Background(), &PutRequest{Key: []byte("k1"), Value: []byte("v1")})
+	if err != nil {
+		t.Fatalf("Put returned error: %v", err)
+	}
+	if !putResp.Success {
+		t.Fatalf("Put failed in standalone mode")
+	}
+
+	getResp, err := srv.Get(context.Background(), &GetRequest{Key: []byte("k1")})
+	if err != nil {
+		t.Fatalf("Get returned error: %v", err)
+	}
+	if !getResp.Success || string(getResp.Value) != "v1" {
+		t.Fatalf("Get returned success=%v value=%q, want true/v1", getResp.Success, getResp.Value)
+	}
+}