diff --git a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/CancelTaskRequest_v0_3.java b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/CancelTaskRequest_v0_3.java
index adad0aefc..f23d2e63e 100644
--- a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/CancelTaskRequest_v0_3.java
+++ b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/CancelTaskRequest_v0_3.java
@@ -12,6 +12,10 @@
  */
 public final class CancelTaskRequest_v0_3 extends NonStreamingJSONRPCRequest_v0_3<TaskIdParams_v0_3> {
 
+    private CancelTaskRequest_v0_3() {
+    }
+
+
     public static final String METHOD = "tasks/cancel";
 
     public CancelTaskRequest_v0_3(String jsonrpc, Object id, String method, TaskIdParams_v0_3 params) {
diff --git a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/CancelTaskResponse_v0_3.java b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/CancelTaskResponse_v0_3.java
index e4a58fe74..7c3433f75 100644
--- a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/CancelTaskResponse_v0_3.java
+++ b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/CancelTaskResponse_v0_3.java
@@ -6,6 +6,9 @@
 
 public final class CancelTaskResponse_v0_3 extends JSONRPCResponse_v0_3<Task_v0_3> {
 
+    private CancelTaskResponse_v0_3() {
+    }
+
     public CancelTaskResponse_v0_3(String jsonrpc, Object id, Task_v0_3 result, JSONRPCError_v0_3 error) {
         super(jsonrpc, id, result, error, Task_v0_3.class);
     }
diff --git a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/DeleteTaskPushNotificationConfigRequest_v0_3.java b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/DeleteTaskPushNotificationConfigRequest_v0_3.java
index 132de62b9..18c3e5246 100644
--- a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/DeleteTaskPushNotificationConfigRequest_v0_3.java
+++ b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/DeleteTaskPushNotificationConfigRequest_v0_3.java
@@ -10,6 +10,10 @@
  */
 public final class DeleteTaskPushNotificationConfigRequest_v0_3 extends NonStreamingJSONRPCRequest_v0_3<DeleteTaskPushNotificationConfigParams_v0_3> {
 
+    private DeleteTaskPushNotificationConfigRequest_v0_3() {
+    }
+
+
     public static final String METHOD = "tasks/pushNotificationConfig/delete";
 
     public DeleteTaskPushNotificationConfigRequest_v0_3(String jsonrpc, Object id, String method, DeleteTaskPushNotificationConfigParams_v0_3 params) {
diff --git a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/DeleteTaskPushNotificationConfigResponse_v0_3.java b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/DeleteTaskPushNotificationConfigResponse_v0_3.java
index e581bedaa..f42d2e122 100644
--- a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/DeleteTaskPushNotificationConfigResponse_v0_3.java
+++ b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/DeleteTaskPushNotificationConfigResponse_v0_3.java
@@ -5,6 +5,9 @@
  */
 public final class DeleteTaskPushNotificationConfigResponse_v0_3 extends JSONRPCResponse_v0_3<Void> {
 
+    private DeleteTaskPushNotificationConfigResponse_v0_3() {
+    }
+
     public DeleteTaskPushNotificationConfigResponse_v0_3(String jsonrpc, Object id, Void result, JSONRPCError_v0_3 error) {
         super(jsonrpc, id, result, error, Void.class);
     }
diff --git a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetAuthenticatedExtendedCardRequest_v0_3.java b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetAuthenticatedExtendedCardRequest_v0_3.java
index f6b14e6a4..466ea4c87 100644
--- a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetAuthenticatedExtendedCardRequest_v0_3.java
+++ b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetAuthenticatedExtendedCardRequest_v0_3.java
@@ -11,6 +11,10 @@
  */
 public final class GetAuthenticatedExtendedCardRequest_v0_3 extends NonStreamingJSONRPCRequest_v0_3<Void> {
 
+    private GetAuthenticatedExtendedCardRequest_v0_3() {
+    }
+
+
     public static final String METHOD = "agent/getAuthenticatedExtendedCard";
 
     public GetAuthenticatedExtendedCardRequest_v0_3(String jsonrpc, Object id, String method, Void params) {
diff --git a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetAuthenticatedExtendedCardResponse_v0_3.java b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetAuthenticatedExtendedCardResponse_v0_3.java
index 5a7db5167..a6e4e5d04 100644
--- a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetAuthenticatedExtendedCardResponse_v0_3.java
+++ b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetAuthenticatedExtendedCardResponse_v0_3.java
@@ -5,6 +5,9 @@
  */
 public final class GetAuthenticatedExtendedCardResponse_v0_3 extends JSONRPCResponse_v0_3<AgentCard_v0_3> {
 
+    private GetAuthenticatedExtendedCardResponse_v0_3() {
+    }
+
     public GetAuthenticatedExtendedCardResponse_v0_3(String jsonrpc, Object id, AgentCard_v0_3 result, JSONRPCError_v0_3 error) {
         super(jsonrpc, id, result, error, AgentCard_v0_3.class);
     }
diff --git a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetTaskPushNotificationConfigRequest_v0_3.java b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetTaskPushNotificationConfigRequest_v0_3.java
index 5252f29c4..d86854612 100644
--- a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetTaskPushNotificationConfigRequest_v0_3.java
+++ b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetTaskPushNotificationConfigRequest_v0_3.java
@@ -10,6 +10,10 @@
  */
 public final class GetTaskPushNotificationConfigRequest_v0_3 extends NonStreamingJSONRPCRequest_v0_3<GetTaskPushNotificationConfigParams_v0_3> {
 
+    private GetTaskPushNotificationConfigRequest_v0_3() {
+    }
+
+
     public static final String METHOD = "tasks/pushNotificationConfig/get";
 
     public GetTaskPushNotificationConfigRequest_v0_3(String jsonrpc, Object id, String method, GetTaskPushNotificationConfigParams_v0_3 params) {
diff --git a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetTaskPushNotificationConfigResponse_v0_3.java b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetTaskPushNotificationConfigResponse_v0_3.java
index d817cf844..82e0bf455 100644
--- a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetTaskPushNotificationConfigResponse_v0_3.java
+++ b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetTaskPushNotificationConfigResponse_v0_3.java
@@ -5,6 +5,9 @@
  */
 public final class GetTaskPushNotificationConfigResponse_v0_3 extends JSONRPCResponse_v0_3<TaskPushNotificationConfig_v0_3> {
 
+    private GetTaskPushNotificationConfigResponse_v0_3() {
+    }
+
     public GetTaskPushNotificationConfigResponse_v0_3(String jsonrpc, Object id, TaskPushNotificationConfig_v0_3 result, JSONRPCError_v0_3 error) {
         super(jsonrpc, id, result, error, TaskPushNotificationConfig_v0_3.class);
     }
diff --git a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetTaskRequest_v0_3.java b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetTaskRequest_v0_3.java
index 561ef5037..6e51ec89e 100644
--- a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetTaskRequest_v0_3.java
+++ b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetTaskRequest_v0_3.java
@@ -12,6 +12,10 @@
  */
 public final class GetTaskRequest_v0_3 extends NonStreamingJSONRPCRequest_v0_3<TaskQueryParams_v0_3> {
 
+    private GetTaskRequest_v0_3() {
+    }
+
+
     public static final String METHOD = "tasks/get";
 
     public GetTaskRequest_v0_3(String jsonrpc, Object id, String method, TaskQueryParams_v0_3 params) {
diff --git a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetTaskResponse_v0_3.java b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetTaskResponse_v0_3.java
index 68f768bcc..63c6a35e2 100644
--- a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetTaskResponse_v0_3.java
+++ b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/GetTaskResponse_v0_3.java
@@ -5,6 +5,9 @@
  */
 public final class GetTaskResponse_v0_3 extends JSONRPCResponse_v0_3<Task_v0_3> {
 
+    private GetTaskResponse_v0_3() {
+    }
+
     public GetTaskResponse_v0_3(String jsonrpc, Object id, Task_v0_3 result, JSONRPCError_v0_3 error) {
         super(jsonrpc, id, result, error, Task_v0_3.class);
     }
diff --git a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/JSONRPCErrorResponse_v0_3.java b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/JSONRPCErrorResponse_v0_3.java
index 87548fd73..c5b20540f 100644
--- a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/JSONRPCErrorResponse_v0_3.java
+++ b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/JSONRPCErrorResponse_v0_3.java
@@ -7,6 +7,9 @@
  */
 public final class JSONRPCErrorResponse_v0_3 extends JSONRPCResponse_v0_3<Void> {
 
+    private JSONRPCErrorResponse_v0_3() {
+    }
+
     /**
      * Constructs a JSON-RPC error response with all fields.
      * <p>
diff --git a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/ListTaskPushNotificationConfigRequest_v0_3.java b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/ListTaskPushNotificationConfigRequest_v0_3.java
index 5b5657394..513ca555d 100644
--- a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/ListTaskPushNotificationConfigRequest_v0_3.java
+++ b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/ListTaskPushNotificationConfigRequest_v0_3.java
@@ -10,6 +10,10 @@
  */
 public final class ListTaskPushNotificationConfigRequest_v0_3 extends NonStreamingJSONRPCRequest_v0_3<ListTaskPushNotificationConfigParams_v0_3> {
 
+    private ListTaskPushNotificationConfigRequest_v0_3() {
+    }
+
+
     public static final String METHOD = "tasks/pushNotificationConfig/list";
 
     public ListTaskPushNotificationConfigRequest_v0_3(String jsonrpc, Object id, String method, ListTaskPushNotificationConfigParams_v0_3 params) {
diff --git a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/ListTaskPushNotificationConfigResponse_v0_3.java b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/ListTaskPushNotificationConfigResponse_v0_3.java
index 447fe02de..5a174c86a 100644
--- a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/ListTaskPushNotificationConfigResponse_v0_3.java
+++ b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/ListTaskPushNotificationConfigResponse_v0_3.java
@@ -7,6 +7,9 @@
  */
 public final class ListTaskPushNotificationConfigResponse_v0_3 extends JSONRPCResponse_v0_3<List<TaskPushNotificationConfig_v0_3>> {
 
+    private ListTaskPushNotificationConfigResponse_v0_3() {
+    }
+
     public ListTaskPushNotificationConfigResponse_v0_3(String jsonrpc, Object id, List<TaskPushNotificationConfig_v0_3> result, JSONRPCError_v0_3 error) {
         super(jsonrpc, id, result, error, (Class<List<TaskPushNotificationConfig_v0_3>>) (Class<?>) List.class);
     }
diff --git a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SendMessageRequest_v0_3.java b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SendMessageRequest_v0_3.java
index 6fd4a08ed..c316bd09f 100644
--- a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SendMessageRequest_v0_3.java
+++ b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SendMessageRequest_v0_3.java
@@ -11,6 +11,10 @@
  */
 public final class SendMessageRequest_v0_3 extends NonStreamingJSONRPCRequest_v0_3<MessageSendParams_v0_3> {
 
+    private SendMessageRequest_v0_3() {
+    }
+
+
     public static final String METHOD = "message/send";
 
     /**
diff --git a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SendMessageResponse_v0_3.java b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SendMessageResponse_v0_3.java
index b779bca00..7bd1e84ba 100644
--- a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SendMessageResponse_v0_3.java
+++ b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SendMessageResponse_v0_3.java
@@ -5,6 +5,9 @@
  */
 public final class SendMessageResponse_v0_3 extends JSONRPCResponse_v0_3<EventKind_v0_3> {
 
+    private SendMessageResponse_v0_3() {
+    }
+
     public SendMessageResponse_v0_3(String jsonrpc, Object id, EventKind_v0_3 result, JSONRPCError_v0_3 error) {
         super(jsonrpc, id, result, error, EventKind_v0_3.class);
     }
diff --git a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SendStreamingMessageRequest_v0_3.java b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SendStreamingMessageRequest_v0_3.java
index b6f7fb2ea..42f0ae266 100644
--- a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SendStreamingMessageRequest_v0_3.java
+++ b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SendStreamingMessageRequest_v0_3.java
@@ -11,6 +11,10 @@
  */
 public final class SendStreamingMessageRequest_v0_3 extends StreamingJSONRPCRequest_v0_3<MessageSendParams_v0_3> {
 
+    private SendStreamingMessageRequest_v0_3() {
+    }
+
+
     public static final String METHOD = "message/stream";
 
     public SendStreamingMessageRequest_v0_3(String jsonrpc, Object id, String method, MessageSendParams_v0_3 params) {
diff --git a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SendStreamingMessageResponse_v0_3.java b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SendStreamingMessageResponse_v0_3.java
index 75df3f983..14df2a197 100644
--- a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SendStreamingMessageResponse_v0_3.java
+++ b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SendStreamingMessageResponse_v0_3.java
@@ -5,6 +5,9 @@
  */
 public final class SendStreamingMessageResponse_v0_3 extends JSONRPCResponse_v0_3<StreamingEventKind_v0_3> {
 
+    private SendStreamingMessageResponse_v0_3() {
+    }
+
     public SendStreamingMessageResponse_v0_3(String jsonrpc, Object id, StreamingEventKind_v0_3 result, JSONRPCError_v0_3 error) {
         super(jsonrpc, id, result, error, StreamingEventKind_v0_3.class);
     }
diff --git a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SetTaskPushNotificationConfigRequest_v0_3.java b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SetTaskPushNotificationConfigRequest_v0_3.java
index 2c08dc7fe..41a23c6be 100644
--- a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SetTaskPushNotificationConfigRequest_v0_3.java
+++ b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SetTaskPushNotificationConfigRequest_v0_3.java
@@ -11,6 +11,10 @@
  */
 public final class SetTaskPushNotificationConfigRequest_v0_3 extends NonStreamingJSONRPCRequest_v0_3<TaskPushNotificationConfig_v0_3> {
 
+    private SetTaskPushNotificationConfigRequest_v0_3() {
+    }
+
+
     public static final String METHOD = "tasks/pushNotificationConfig/set";
 
     public SetTaskPushNotificationConfigRequest_v0_3(String jsonrpc, Object id, String method, TaskPushNotificationConfig_v0_3 params) {
diff --git a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SetTaskPushNotificationConfigResponse_v0_3.java b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SetTaskPushNotificationConfigResponse_v0_3.java
index 054826f72..6d1a14cbb 100644
--- a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SetTaskPushNotificationConfigResponse_v0_3.java
+++ b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/SetTaskPushNotificationConfigResponse_v0_3.java
@@ -5,6 +5,9 @@
  */
 public final class SetTaskPushNotificationConfigResponse_v0_3 extends JSONRPCResponse_v0_3<TaskPushNotificationConfig_v0_3> {
 
+    private SetTaskPushNotificationConfigResponse_v0_3() {
+    }
+
     public SetTaskPushNotificationConfigResponse_v0_3(String jsonrpc, Object id, TaskPushNotificationConfig_v0_3 result, JSONRPCError_v0_3 error) {
         super(jsonrpc, id, result, error, TaskPushNotificationConfig_v0_3.class);
     }
diff --git a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/TaskResubscriptionRequest_v0_3.java b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/TaskResubscriptionRequest_v0_3.java
index d9bfbb7ed..70a25c9ce 100644
--- a/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/TaskResubscriptionRequest_v0_3.java
+++ b/compat-0.3/spec/src/main/java/org/a2aproject/sdk/compat03/spec/TaskResubscriptionRequest_v0_3.java
@@ -11,6 +11,10 @@
  */
 public final class TaskResubscriptionRequest_v0_3 extends StreamingJSONRPCRequest_v0_3<TaskIdParams_v0_3> {
 
+    private TaskResubscriptionRequest_v0_3() {
+    }
+
+
     public static final String METHOD = "tasks/resubscribe";
 
     public TaskResubscriptionRequest_v0_3(String jsonrpc, Object id, String method, TaskIdParams_v0_3 params) {
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/A2AErrorResponse.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/A2AErrorResponse.java
index 5eeaab8e3..dd60a84c0 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/A2AErrorResponse.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/A2AErrorResponse.java
@@ -23,6 +23,10 @@
  */
 public final class A2AErrorResponse extends A2AResponse<Void> {
 
+    private A2AErrorResponse() {
+    }
+
+
     /**
      * Constructs a JSON-RPC error response with all fields.
      * <p>
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/CancelTaskRequest.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/CancelTaskRequest.java
index 0196d0f21..c13a345d2 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/CancelTaskRequest.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/CancelTaskRequest.java
@@ -28,6 +28,10 @@
  */
 public final class CancelTaskRequest extends NonStreamingJSONRPCRequest<CancelTaskParams> {
 
+    private CancelTaskRequest() {
+    }
+
+
     /**
      * Creates a new CancelTaskRequest with the specified JSON-RPC parameters.
      *
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/CancelTaskResponse.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/CancelTaskResponse.java
index 945f08830..78417ba3c 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/CancelTaskResponse.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/CancelTaskResponse.java
@@ -24,6 +24,10 @@
 
 public final class CancelTaskResponse extends A2AResponse<Task> {
 
+    private CancelTaskResponse() {
+    }
+
+
     /**
      * Constructs a CancelTaskResponse with full parameters.
      *
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/CreateTaskPushNotificationConfigRequest.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/CreateTaskPushNotificationConfigRequest.java
index ac0277f31..a471ca982 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/CreateTaskPushNotificationConfigRequest.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/CreateTaskPushNotificationConfigRequest.java
@@ -21,6 +21,10 @@
  */
 public final class CreateTaskPushNotificationConfigRequest extends NonStreamingJSONRPCRequest<TaskPushNotificationConfig> {
 
+    private CreateTaskPushNotificationConfigRequest() {
+    }
+
+
     /**
      * Constructs request with all parameters.
      *
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/CreateTaskPushNotificationConfigResponse.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/CreateTaskPushNotificationConfigResponse.java
index 6250de0a3..de9df6192 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/CreateTaskPushNotificationConfigResponse.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/CreateTaskPushNotificationConfigResponse.java
@@ -21,6 +21,10 @@
  */
 public final class CreateTaskPushNotificationConfigResponse extends A2AResponse<TaskPushNotificationConfig> {
 
+    private CreateTaskPushNotificationConfigResponse() {
+    }
+
+
     /**
      * Constructs response with all parameters.
      *
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/DeleteTaskPushNotificationConfigRequest.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/DeleteTaskPushNotificationConfigRequest.java
index cbbdf6925..b99f8ed76 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/DeleteTaskPushNotificationConfigRequest.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/DeleteTaskPushNotificationConfigRequest.java
@@ -22,6 +22,10 @@
  */
 public final class DeleteTaskPushNotificationConfigRequest extends NonStreamingJSONRPCRequest<DeleteTaskPushNotificationConfigParams> {
 
+    private DeleteTaskPushNotificationConfigRequest() {
+    }
+
+
     /**
      * Creates a new DeleteTaskPushNotificationConfigRequest with the specified JSON-RPC parameters.
      *
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/DeleteTaskPushNotificationConfigResponse.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/DeleteTaskPushNotificationConfigResponse.java
index 9b2608b50..4d35afdca 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/DeleteTaskPushNotificationConfigResponse.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/DeleteTaskPushNotificationConfigResponse.java
@@ -15,6 +15,10 @@
  */
 public final class DeleteTaskPushNotificationConfigResponse extends A2AResponse<Void> {
 
+    private DeleteTaskPushNotificationConfigResponse() {
+    }
+
+
     /**
      * Creates a new DeleteTaskPushNotificationConfigResponse with full JSON-RPC parameters.
      *
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetExtendedAgentCardRequest.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetExtendedAgentCardRequest.java
index 18fbbd7e5..5bfc6cfa2 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetExtendedAgentCardRequest.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetExtendedAgentCardRequest.java
@@ -34,6 +34,10 @@
  */
 public final class GetExtendedAgentCardRequest extends NonStreamingJSONRPCRequest<Void> {
 
+    private GetExtendedAgentCardRequest() {
+    }
+
+
     /**
      * Constructs request with full parameters.
      *
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetExtendedAgentCardResponse.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetExtendedAgentCardResponse.java
index 1e628fdee..817add256 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetExtendedAgentCardResponse.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetExtendedAgentCardResponse.java
@@ -22,6 +22,10 @@
  */
 public final class GetExtendedAgentCardResponse extends A2AResponse<AgentCard> {
 
+    private GetExtendedAgentCardResponse() {
+    }
+
+
     /**
      * Constructs response with full parameters.
      *
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetTaskPushNotificationConfigRequest.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetTaskPushNotificationConfigRequest.java
index 9cbd4598d..e5232a3af 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetTaskPushNotificationConfigRequest.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetTaskPushNotificationConfigRequest.java
@@ -22,6 +22,10 @@
  */
 public final class GetTaskPushNotificationConfigRequest extends NonStreamingJSONRPCRequest<GetTaskPushNotificationConfigParams> {
 
+    private GetTaskPushNotificationConfigRequest() {
+    }
+
+
     /**
      * Constructs request with all parameters.
      *
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetTaskPushNotificationConfigResponse.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetTaskPushNotificationConfigResponse.java
index 33914bfdf..2cde30d23 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetTaskPushNotificationConfigResponse.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetTaskPushNotificationConfigResponse.java
@@ -18,6 +18,10 @@
  */
 public final class GetTaskPushNotificationConfigResponse extends A2AResponse<TaskPushNotificationConfig> {
 
+    private GetTaskPushNotificationConfigResponse() {
+    }
+
+
     /**
      * Constructs response with full parameters.
      *
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetTaskRequest.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetTaskRequest.java
index a7f3f6254..1d68c9f4d 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetTaskRequest.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetTaskRequest.java
@@ -23,6 +23,10 @@
  */
 public final class GetTaskRequest extends NonStreamingJSONRPCRequest<TaskQueryParams> {
 
+    private GetTaskRequest() {
+    }
+
+
     /**
      * Constructs request with all parameters.
      *
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetTaskResponse.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetTaskResponse.java
index 419f094b6..3f373a398 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetTaskResponse.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/GetTaskResponse.java
@@ -20,6 +20,10 @@
  */
 public final class GetTaskResponse extends A2AResponse<Task> {
 
+    private GetTaskResponse() {
+    }
+
+
     /**
      * Constructs response with full parameters.
      *
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/ListTaskPushNotificationConfigsRequest.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/ListTaskPushNotificationConfigsRequest.java
index 050d10626..d15f3671e 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/ListTaskPushNotificationConfigsRequest.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/ListTaskPushNotificationConfigsRequest.java
@@ -23,6 +23,10 @@
  */
 public final class ListTaskPushNotificationConfigsRequest extends NonStreamingJSONRPCRequest<ListTaskPushNotificationConfigsParams> {
 
+    private ListTaskPushNotificationConfigsRequest() {
+    }
+
+
     /**
      * Constructs request with all parameters.
      *
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/ListTaskPushNotificationConfigsResponse.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/ListTaskPushNotificationConfigsResponse.java
index 9ae46f471..0bdce5fb7 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/ListTaskPushNotificationConfigsResponse.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/ListTaskPushNotificationConfigsResponse.java
@@ -20,6 +20,10 @@
  */
 public final class ListTaskPushNotificationConfigsResponse extends A2AResponse<ListTaskPushNotificationConfigsResult> {
 
+    private ListTaskPushNotificationConfigsResponse() {
+    }
+
+
     /**
      * Constructs response with all parameters.
      *
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/ListTasksRequest.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/ListTasksRequest.java
index 0e238e27a..ebb9fee0c 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/ListTasksRequest.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/ListTasksRequest.java
@@ -11,6 +11,10 @@
  */
 public final class ListTasksRequest extends NonStreamingJSONRPCRequest<ListTasksParams> {
 
+    private ListTasksRequest() {
+    }
+
+
     /**
      * Constructs request with all parameters.
      *
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/ListTasksResponse.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/ListTasksResponse.java
index 981e59652..bbbe307ab 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/ListTasksResponse.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/ListTasksResponse.java
@@ -7,6 +7,10 @@
  */
 public final class ListTasksResponse extends A2AResponse<ListTasksResult> {
 
+    private ListTasksResponse() {
+    }
+
+
     /**
      * Constructs response with all parameters.
      *
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/NonStreamingJSONRPCRequest.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/NonStreamingJSONRPCRequest.java
index 52caff0f2..b2b439715 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/NonStreamingJSONRPCRequest.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/NonStreamingJSONRPCRequest.java
@@ -10,6 +10,9 @@ public abstract sealed class NonStreamingJSONRPCRequest<T> extends A2ARequest<T>
         SendMessageRequest, DeleteTaskPushNotificationConfigRequest, ListTaskPushNotificationConfigsRequest,
         GetExtendedAgentCardRequest, ListTasksRequest {
 
+    NonStreamingJSONRPCRequest() {
+    }
+
     NonStreamingJSONRPCRequest(String jsonrpc, String method, Object id, T params) {
         validateAndSetJsonParameters(jsonrpc, method, id, params, true);
     }
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/SendMessageRequest.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/SendMessageRequest.java
index a1d6c64b4..b2aa03e05 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/SendMessageRequest.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/SendMessageRequest.java
@@ -34,6 +34,10 @@
  */
 public final class SendMessageRequest extends NonStreamingJSONRPCRequest<MessageSendParams> {
 
+    private SendMessageRequest() {
+    }
+
+
     /**
      * Constructs a SendMessageRequest with the specified JSON-RPC fields.
      * <p>
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/SendMessageResponse.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/SendMessageResponse.java
index 2a43efeae..f5b52d62a 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/SendMessageResponse.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/SendMessageResponse.java
@@ -8,6 +8,10 @@
  */
 public final class SendMessageResponse extends A2AResponse<EventKind> {
 
+    private SendMessageResponse() {
+    }
+
+
     /**
      * Constructs response with all parameters.
      *
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/SendStreamingMessageRequest.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/SendStreamingMessageRequest.java
index 4eaa44e0e..ce1e6cc8d 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/SendStreamingMessageRequest.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/SendStreamingMessageRequest.java
@@ -26,6 +26,10 @@
  */
 public final class SendStreamingMessageRequest extends StreamingJSONRPCRequest<MessageSendParams> {
 
+    private SendStreamingMessageRequest() {
+    }
+
+
     /**
      * Constructs request with all parameters.
      *
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/SendStreamingMessageResponse.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/SendStreamingMessageResponse.java
index 5a7a7dc6e..89f556a3d 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/SendStreamingMessageResponse.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/SendStreamingMessageResponse.java
@@ -26,6 +26,10 @@
  */
 public final class SendStreamingMessageResponse extends A2AResponse<StreamingEventKind> {
 
+    private SendStreamingMessageResponse() {
+    }
+
+
     /**
      * Constructs response with all parameters.
      *
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/StreamingJSONRPCRequest.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/StreamingJSONRPCRequest.java
index 100152ce9..8c2cac1cf 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/StreamingJSONRPCRequest.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/StreamingJSONRPCRequest.java
@@ -32,6 +32,9 @@
 public abstract sealed class StreamingJSONRPCRequest<T> extends A2ARequest<T> permits SubscribeToTaskRequest,
         SendStreamingMessageRequest {
 
+    StreamingJSONRPCRequest() {
+    }
+
     StreamingJSONRPCRequest(String jsonrpc, String method, Object id, T params) {
         validateAndSetJsonParameters(jsonrpc, method, id, params, true);
     }
diff --git a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/SubscribeToTaskRequest.java b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/SubscribeToTaskRequest.java
index 7a1a56d19..ca93edc9b 100644
--- a/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/SubscribeToTaskRequest.java
+++ b/jsonrpc-common/src/main/java/org/a2aproject/sdk/jsonrpc/common/wrappers/SubscribeToTaskRequest.java
@@ -29,6 +29,10 @@
  */
 public final class SubscribeToTaskRequest extends StreamingJSONRPCRequest<TaskIdParams> {
 
+    private SubscribeToTaskRequest() {
+    }
+
+
     /**
      * Constructs request with all parameters.
      *