diff --git a/.claude/settings.local.json b/.claude/settings.local.json
index 89dc85ab..c62ed025 100644
--- a/.claude/settings.local.json
+++ b/.claude/settings.local.json
@@ -88,7 +88,15 @@
       "PowerShell($dll = \"C:\\\\Users\\\\Fullepi\\\\.nuget\\\\packages\\\\devexpress.blazor\\\\25.1.5\\\\lib\\\\net8.0\\\\DevExpress.Blazor.v25.1.dll\"; $bytes = [System.IO.File]::ReadAllBytes\\($dll\\); $text = [System.Text.Encoding]::ASCII.GetString\\($bytes\\); @\\(\"BodyTemplate\",\"get_CssClass\",\"MessageBoxOptions\",\"TitleTemplate\"\\) | ForEach-Object { \"$\\($_\\): $\\($text.Contains\\($_\\)\\)\" })",
       "PowerShell(dotnet test \"H:\\\\Applications\\\\Aycode\\\\Source\\\\AyCode.Core\\\\AyCode.Services.Tests\\\\AyCode.Services.Tests.csproj\" --filter \"FullyQualifiedName~EkaerTradeCardValidatorTests\" --nologo -v quiet 2>$null)",
       "PowerShell(dotnet build \"H:\\\\Applications\\\\Aycode\\\\Source\\\\AyCode.Core\\\\AyCode.Services.Server\\\\AyCode.Services.Server.csproj\" --nologo -v quiet 2>$null)",
-      "PowerShell(dotnet build \"H:\\\\Applications\\\\Aycode\\\\Source\\\\AyCode.Core\\\\AyCode.Services\\\\AyCode.Services.csproj\" -c Debug --nologo -v quiet 2>$null)"
+      "PowerShell(dotnet build \"H:\\\\Applications\\\\Aycode\\\\Source\\\\AyCode.Core\\\\AyCode.Services\\\\AyCode.Services.csproj\" -c Debug --nologo -v quiet 2>$null)",
+      "PowerShell(dotnet build \"H:\\\\Applications\\\\Aycode\\\\Source\\\\AyCode.Core\\\\AyCode.Services.Server\\\\AyCode.Services.Server.csproj\" -c Debug --nologo -v quiet 2>$null)",
+      "PowerShell(\"=== Services.Server ===\")",
+      "PowerShell(dotnet build \"H:\\\\Applications\\\\Mango\\\\Source\\\\FruitBankHybridApp\\\\FruitBank.Common\\\\FruitBank.Common.csproj\" -c Debug --nologo -v quiet 2>$null)",
+      "PowerShell(dotnet build \"H:\\\\Applications\\\\Mango\\\\Source\\\\FruitBankHybridApp\\\\FruitBank.Common.Server\\\\FruitBank.Common.Server.csproj\" -c Debug --nologo -v quiet 2>$null)",
+      "PowerShell(\"=== FruitBank.Common.Server ===\")",
+      "PowerShell(Remove-Item \"H:\\\\Applications\\\\Mango\\\\Source\\\\FruitBankHybridApp\\\\FruitBank.Common\\\\Loggers\\\\FbLogItem.cs\" -Confirm:$false)",
+      "PowerShell(\"=== Server ===\")",
+      "PowerShell(\"=== Generated ===\")"
     ]
   }
 }
diff --git a/FruitBank.Common.Server/FruitBank.Common.Server.csproj b/FruitBank.Common.Server/FruitBank.Common.Server.csproj
index 596a520d..0933063a 100644
--- a/FruitBank.Common.Server/FruitBank.Common.Server.csproj
+++ b/FruitBank.Common.Server/FruitBank.Common.Server.csproj
@@ -29,6 +29,10 @@
 		<Reference Include="AyCode.Core">
 			<HintPath>..\..\..\..\Aycode\Source\AyCode.Core\AyCode.Services.Server\bin\FruitBank\$(Configuration)\net9.0\AyCode.Core.dll</HintPath>
 		</Reference>
+		<!-- FbLogItem : AcLogItemClient — a hub TLogItem-constraintjéhez kell a bázistípus assembly-je (a DLL-referencia nem tranzitív). -->
+		<Reference Include="AyCode.Entities">
+			<HintPath>..\..\..\..\Aycode\Source\AyCode.Core\AyCode.Services.Server\bin\FruitBank\$(Configuration)\net9.0\AyCode.Entities.dll</HintPath>
+		</Reference>
 		<Reference Include="AyCode.Interfaces">
 		  <HintPath>..\..\..\..\Aycode\Source\AyCode.Core\AyCode.Services.Server\bin\FruitBank\$(Configuration)\net9.0\AyCode.Interfaces.dll</HintPath>
 		</Reference>
diff --git a/FruitBank.Common.Server/Services/Loggers/README.md b/FruitBank.Common.Server/Services/Loggers/README.md
index e369affc..2e04e3d2 100644
--- a/FruitBank.Common.Server/Services/Loggers/README.md
+++ b/FruitBank.Common.Server/Services/Loggers/README.md
@@ -5,4 +5,4 @@ Server-side logging implementations.
 ## Key Files
 
 - **`ConsoleLogWriter.cs`** — Lightweight console logger extending AcConsoleLogWriter. Configurable by AppType, LogLevel, category.
-- **`LoggerToLoggerApiController.cs`** — Aggregates multiple IAcLogWriterBase implementations into a single logger for API controllers.
+- **`LoggerToLoggerApiController.cs`** — Aggregates multiple IAcLogWriterBase implementations into a single logger; a `LoggerSignalRHub` „nyelője" — a kliensekről felküldött log-itemeket ez teríti szét a szerver writerekre (console + NopLogWriter/DB). ⚠️ A ctor **`IEnumerable<IAcLogWriterBase>`** kell legyen (2026-07 fix): a MS DI a `params IAcLogWriterBase[]` tömböt NEM tudja feloldani (`Unable to resolve service for type 'IAcLogWriterBase[]'`), amitől a hub aktiválása minden kliens-kapcsolódásnál elszállt és a felküldött logok némán elvesztek.
diff --git a/FruitBank.Common.Server/Services/SignalRs/LoggerSignalRHub.cs b/FruitBank.Common.Server/Services/SignalRs/LoggerSignalRHub.cs
index b0bfd2e5..5bfdd6c2 100644
--- a/FruitBank.Common.Server/Services/SignalRs/LoggerSignalRHub.cs
+++ b/FruitBank.Common.Server/Services/SignalRs/LoggerSignalRHub.cs
@@ -1,8 +1,11 @@
-using AyCode.Services.Server.SignalRs;
+using AyCode.Services.Server.SignalRs;
+using FruitBank.Common.Loggers;
 using FruitBank.Common.Server.Services.Loggers;
 
 namespace FruitBank.Common.Server.Services.SignalRs;
 
 
-public class LoggerSignalRHub(LoggerToLoggerApiController logger) : AcLoggerSignalRHub<LoggerToLoggerApiController>(logger)
-{ }
\ No newline at end of file
+// LogItemClient: a kliens-writerrel (SignaRClientLogItemWriter : AcSignaRClientLogItemWriter<LogItemClient>) azonos
+// wire-típus — a SignalR erre deserializál, AcBinary-nál a LogItemClient generált serializere fut.
+public class LoggerSignalRHub(LoggerToLoggerApiController logger) : AcLoggerSignalRHub<LoggerToLoggerApiController, LogItemClient>(logger)
+{ }
diff --git a/FruitBank.Common.Server/Services/SignalRs/README.md b/FruitBank.Common.Server/Services/SignalRs/README.md
index f3d9ec38..0f68cd83 100644
--- a/FruitBank.Common.Server/Services/SignalRs/README.md
+++ b/FruitBank.Common.Server/Services/SignalRs/README.md
@@ -7,4 +7,4 @@ SignalR hub implementations and real-time broadcast service.
 - **`DevAdminSignalRHub.cs`** — Main admin hub. Dependencies: IConfiguration, IFruitBankDataControllerServer, ICustomOrderSignalREndpointServer, IStockSignalREndpointServer. Registers all three endpoint interfaces with DynamicMethodRegistry. Uses AcBinary serialization.
 - **`AcWebSignalRHubWithSessionBase.cs`** — Generic base hub with session management (OnConnected/OnDisconnected hooks).
 - **`SignalRSendToClientService.cs`** — Broadcasts real-time notifications to all clients: SendOrderChanged, SendOrderItemChanged, SendShippingChanged, SendProductChanged, etc.
-- **`LoggerSignalRHub.cs`** — Minimal hub for logging/diagnostics.
+- **`LoggerSignalRHub.cs`** — A kliens-log feltöltés fogadó hubja (`/loggerHub`): `AcLoggerSignalRHub<LoggerToLoggerApiController, LogItemClient>`. A `LogItemClient` wire-típusnak azonosnak KELL lennie a kliens-writerével (`SignaRClientLogItemWriter : AcSignaRClientLogItemWriter<LogItemClient>`) — a SignalR erre deserializál, AcBinary-protokollon a generált serializere fut. Kapcsolat-életciklust logol (`Logger client connected/disconnected`), így a halott feltöltő-csatorna a szerver-konzolból látszik.
diff --git a/FruitBank.Common/Loggers/LogItemClient.cs b/FruitBank.Common/Loggers/LogItemClient.cs
new file mode 100644
index 00000000..935b48fb
--- /dev/null
+++ b/FruitBank.Common/Loggers/LogItemClient.cs
@@ -0,0 +1,16 @@
+using AyCode.Core.Serializers.Attributes;
+using AyCode.Entities.LogItems;
+
+namespace FruitBank.Common.Loggers;
+
+/// <summary>
+/// A FruitBank kliens↔szerver log-feltöltés wire-típusa (writer és loggerHub ugyanezt használja — szimmetrikus wire).
+/// Az AcLogItemClient az AyCode.Entities generator-mentes rétegében él; itt, a FruitBank.Common-ban (ahol az
+/// AcBinary source-generator fut) kap generált serializert — így a loggerHub AcBinary-protokollal mehet.
+/// A generator az örökölt propertyket is felveszi (derived → base sorrend, runtime-kompatibilis).
+/// Feature-ök kikapcsolva (false): kis, lapos POCO — id/ref/intern/metadata nem kell, a sorosítás így a leggyorsabb.
+/// </summary>
+[AcBinarySerializable(false)]
+public class LogItemClient : AcLogItemClient
+{
+}
diff --git a/FruitBank.Common/Loggers/README.md b/FruitBank.Common/Loggers/README.md
index b921ec05..25dd4735 100644
--- a/FruitBank.Common/Loggers/README.md
+++ b/FruitBank.Common/Loggers/README.md
@@ -4,4 +4,5 @@ SignalR client-to-server log writer.
 
 ## Key Files
 
-- **`SignaRClientLogItemWriter.cs`** — Routes client logs to `{BaseUrl}/loggerHub` via SignalR. Configurable by AppType and LogLevel.
+- **`LogItemClient.cs`** — A log-feltöltés wire-típusa (`AcLogItemClient` leszármazott, `[AcBinarySerializable(false)]`). A generált AcBinary-serializer ITT él, mert az AyCode.Entities réteg generator-mentes — ez a policy: a keret bázist ad (Ac-prefix), a wire-típust az app származtatja (prefix nélkül). Ugyanez a típus megy a wire mindkét végén (writer + `LoggerSignalRHub`).
+- **`SignaRClientLogItemWriter.cs`** — Routes client logs to `{BaseUrl}/loggerHub` via SignalR (`AcSignaRClientLogItemWriter<LogItemClient>`, **AcBinary protokollon**, egységesen a fbHub-bal). Configurable by AppType and LogLevel. ⚠️ A protokoll `Logger`-e szándékosan `NullLogger.Instance`, és a builderre tilos `AddAcDefaults`/`ConfigureLogging` — a protokoll saját logja a feltöltőn át visszacsatolna (log → sorosítás → log → … robbanó hurok). Részletek a kódkommentben.
diff --git a/FruitBank.Common/Loggers/SignaRClientLogItemWriter.cs b/FruitBank.Common/Loggers/SignaRClientLogItemWriter.cs
index 79e9859a..72b040a8 100644
--- a/FruitBank.Common/Loggers/SignaRClientLogItemWriter.cs
+++ b/FruitBank.Common/Loggers/SignaRClientLogItemWriter.cs
@@ -1,17 +1,38 @@
-using AyCode.Core.Enums;
+using AyCode.Core.Enums;
 using AyCode.Core.Loggers;
+using AyCode.Core.Serializers.Binaries;
 using AyCode.Services.Loggers;
+using AyCode.Services.SignalRs;
+using Microsoft.Extensions.Logging.Abstractions;
 
 namespace FruitBank.Common.Loggers
 {
-    public class SignaRClientLogItemWriter : AcSignaRClientLogItemWriter
+    /// <summary>
+    /// FruitBank log-feltöltő: LogItemClient wire-típussal, AcBinary-protokollon (egységes a fbHub-bal).
+    /// Cél: {BaseUrl}/loggerHub — a BaseUrl-t a host hidratálja az appsettings-ből.
+    /// </summary>
+    public class SignaRClientLogItemWriter : AcSignaRClientLogItemWriter<LogItemClient>
     {
         public SignaRClientLogItemWriter() : this(AppType.Web, LogLevel.Detail, null)
         {
         }
-        public SignaRClientLogItemWriter(AppType appType, LogLevel logLevel, string? categoryName = null) : base($"{FruitBankConstClient.BaseUrl}/{FruitBankConstClient.LoggerHubName}", appType, logLevel, categoryName)
+        public SignaRClientLogItemWriter(AppType appType, LogLevel logLevel, string? categoryName = null)
+            : base($"{FruitBankConstClient.BaseUrl}/{FruitBankConstClient.LoggerHubName}", appType, logLevel, categoryName, CreateProtocolOptions())
         {
         }
-    }
 
+        // ⚠️ VÉGTELEN-CIKLUS VESZÉLY — NE ADJ LOGGERT A PROTOKOLLNAK! ⚠️
+        // Ez a writer maga A log-feltöltő csatorna. Ha a protokoll loggert kapna (LoggerClient, ILogger, bármi,
+        // ami ebbe a writerbe torkollik), akkor minden feltöltés sorosítása ÚJABB log-sorokat termelne
+        // (Serialize start / WriteArgument / ...), amiket ez a writer megint felküldene → sorosítás → log → ...
+        // → robbanó visszacsatolás, a kliens másodpercek alatt megfullad.
+        // Ezért a Logger EXPLICIT NullLogger.Instance (nem null! — a null-t az AddAcBinaryProtocol ??= fallbackje
+        // a DI ILogger<AcBinaryHubProtocol>-jával pótolná, ami visszahozná a hurkot).
+        // Ugyanezért erre a hub-builderre AddAcDefaults/ConfigureLogging SOHA nem kerülhet.
+        private static AcBinaryHubProtocolOptions CreateProtocolOptions() => new()
+        {
+            ProtocolMode = BinaryProtocolMode.Bytes, // WASM-safe, ugyanaz, mint az fbHub-on
+            Logger = NullLogger.Instance,            // süket logger — ld. a fenti figyelmeztetést
+        };
+    }
 }