Added debug node for the debugging and logging

Examples/Nodify.Calculator/Executor.cs

@@ -428,6 +428,33 @@ namespace Nodify.Calculator
                 OnLogMe?.Invoke($"Auth node resolved. Base URL: {_authBaseUrl}, Auth Type: {_authType}");
                 return;
             }
+            if (op is SystemOperationViewModel debugSysOp && debugSysOp.SystemOperationType == SystemOperations.DEBUG)
+            {
+                // Find the data input connection (non-triangle)
+                var debugInputCons = connections.Where(c => c.Input.Operation == op && c.Input.Shape != ConnectorShape.Triangle).ToList();
+                if (debugInputCons.Any())
+                {
+                    var sourceConn = debugInputCons.First();
+                    var sourceNodeId = sourceConn.Output.Operation.NodeId;
+                    if (outputs.TryGetValue(sourceNodeId, out var debugVal))
+                    {
+                        OnLogMe?.Invoke($"[DEBUG] {debugVal}");
+                    }
+                    else if (sourceConn.Output.Value != null)
+                    {
+                        OnLogMe?.Invoke($"[DEBUG] {sourceConn.Output.Value}");
+                    }
+                    else
+                    {
+                        OnLogMe?.Invoke($"[DEBUG] (no value)", logType.Warning);
+                    }
+                }
+                else
+                {
+                    OnLogMe?.Invoke($"[DEBUG] No input connected", logType.Warning);
+                }
+                return;
+            }
 
             // Handle Function nodes — execute the inner flow
             if (op is FunctionOperationViewModel funcOp)

Examples/Nodify.Calculator/GraphSerializer.cs

@@ -234,6 +234,10 @@ namespace Nodify.Calculator
                             case SystemOperations.END:
                                 info.Input.Add(""); // flow input only
                                 break;
+                            case SystemOperations.DEBUG:
+                                info.Input.Add("Value");
+                                info.IsFlowNode = true;
+                                break;
                             case SystemOperations.TAKE:
                                 info.Input.Add("List");
                                 break;

Examples/Nodify.Calculator/Operations/OperationFactory.cs

@@ -99,8 +99,18 @@ namespace Nodify.Calculator
             authNode.Input.Add("Username");
             authNode.Input.Add("Password");
 
+            var debugNode = new OperationInfoViewModel()
+            {
+                Title = "Debug",
+                Type = OperationType.System,
+                sysOp = SystemOperations.DEBUG,
+                IsFlowNode = true
+            };
+            debugNode.Input.Add("Value");
+
             systemNodes.Add(authNode);
             systemNodes.Add(copynode);
+            systemNodes.Add(debugNode);
             systemNodes.Add(begin);
             systemNodes.Add(ending);
             systemNodes.Add(debugAndCreateModels);
@@ -321,6 +331,25 @@ namespace Nodify.Calculator
                         return funcOp;
                     }
 
+                    if (info.sysOp == SystemOperations.DEBUG)
+                    {
+                        var debugOp = new SystemOperationViewModel
+                        {
+                            Title = info.Title,
+                            SystemOperationType = SystemOperations.DEBUG
+                        };
+                        // Flow connectors
+                        debugOp.Input.Add(new ConnectorViewModel { Title = "", Shape = ConnectorShape.Triangle });
+                        debugOp.Output.Add(new ConnectorViewModel { Title = "", Shape = ConnectorShape.Triangle, IsInput = false });
+                        // Data input
+                        foreach (var inp in input)
+                        {
+                            inp.ConnectorColor = Color.LimeGreen;
+                            debugOp.Input.Add(inp);
+                        }
+                        return debugOp;
+                    }
+
                     if (info.sysOp == SystemOperations.AUTH)
                     {
                         var authOp = new AuthOperationViewModel

Examples/Nodify.Calculator/SystemOperationViewModel.cs

@@ -18,7 +18,8 @@ namespace Nodify.Calculator
         PARSEJSON,
         SPLIT,
         AUTH,
-        FUNCTION
+        FUNCTION,
+        DEBUG
     }
 
     public class SystemOperationViewModel : OperationViewModel