diff --git a/Include/Aurora/IO/IAsyncTransaction.hpp b/Include/Aurora/IO/IAsyncTransaction.hpp
index c647a0a9..1a29ee1e 100644
--- a/Include/Aurora/IO/IAsyncTransaction.hpp
+++ b/Include/Aurora/IO/IAsyncTransaction.hpp
@@ -37,6 +37,12 @@ namespace Aurora::IO
          * @return 
         */
         virtual bool     Failed() = 0;
+
+        /**
+         * @brief non-blocking is-signaled (...and dispatched via ::Complete() or other IO yield)
+         * @return 
+        */
+        virtual bool     HasCompleted() = 0;
         
         /**
          * @brief 
diff --git a/Source/IO/FS/Async.Linux.cpp b/Source/IO/FS/Async.Linux.cpp
index 3f77122a..3191dd5f 100644
--- a/Source/IO/FS/Async.Linux.cpp
+++ b/Source/IO/FS/Async.Linux.cpp
@@ -439,6 +439,11 @@ namespace Aurora::IO::FS
         return false;
     }
 
+    bool LinuxAsyncFileTransaction::HasCompleted()
+    {
+        return this->bTxFinished_;
+    }
+
     bool LinuxAsyncFileTransaction::Failed()
     {
         return this->hasError_;
diff --git a/Source/IO/FS/Async.Linux.hpp b/Source/IO/FS/Async.Linux.hpp
index 332baed5..c3a69451 100644
--- a/Source/IO/FS/Async.Linux.hpp
+++ b/Source/IO/FS/Async.Linux.hpp
@@ -61,10 +61,13 @@ namespace Aurora::IO::FS
         bool StartRead(AuUInt64 offset, const AuSPtr<AuMemoryViewWrite> &memoryView) override;
         bool StartWrite(AuUInt64 offset, const AuSPtr<AuMemoryViewRead> &memoryView) override;
         
+        bool Complete() override;
+
         bool     Failed() override;
         AuUInt   GetOSErrorCode() override;
 
-        bool Complete() override;
+        bool     HasCompleted() override;
+
         AuUInt32 GetLastPacketLength() override;
         
         void SetCallback(const AuSPtr<IAsyncFinishedSubscriber> &sub) override;
diff --git a/Source/IO/FS/Async.NT.cpp b/Source/IO/FS/Async.NT.cpp
index 3856711d..b1075184 100644
--- a/Source/IO/FS/Async.NT.cpp
+++ b/Source/IO/FS/Async.NT.cpp
@@ -539,6 +539,12 @@ namespace Aurora::IO::FS
         return CompleteEx(false);
     }
 
+    bool NtAsyncFileTransaction::HasCompleted()
+    {
+        return bool(this->dwLastBytes) ||
+            this->bHasFailed;
+    }
+
     AuUInt32 NtAsyncFileTransaction::GetLastPacketLength()
     {
         return this->dwLastBytes;
diff --git a/Source/IO/FS/Async.NT.hpp b/Source/IO/FS/Async.NT.hpp
index 6fea4bec..f8f88111 100644
--- a/Source/IO/FS/Async.NT.hpp
+++ b/Source/IO/FS/Async.NT.hpp
@@ -43,6 +43,8 @@ namespace Aurora::IO::FS
 
         bool     isIrredeemable_ {};
 
+        bool     HasCompleted() override;
+
         bool     Complete() override;
 
         bool CompleteEx(AuUInt completeRoutine, bool bForce = false);
diff --git a/Source/IO/Net/AuNetStream.Linux.cpp b/Source/IO/Net/AuNetStream.Linux.cpp
index f740c8da..a553e637 100644
--- a/Source/IO/Net/AuNetStream.Linux.cpp
+++ b/Source/IO/Net/AuNetStream.Linux.cpp
@@ -226,6 +226,12 @@ namespace Aurora::IO::Net
         return this->bHasFailed;
     }
     
+    bool LinuxAsyncNetworkTransaction::HasCompleted()
+    {
+        return this->bHasFailed ||
+            this->dwLastBytes;
+    }
+
     AuUInt   LinuxAsyncNetworkTransaction::GetOSErrorCode()
     {
         return this->dwOsErrorCode;
diff --git a/Source/IO/Net/AuNetStream.Linux.hpp b/Source/IO/Net/AuNetStream.Linux.hpp
index ca49bca5..1f0278a6 100644
--- a/Source/IO/Net/AuNetStream.Linux.hpp
+++ b/Source/IO/Net/AuNetStream.Linux.hpp
@@ -33,6 +33,8 @@ namespace Aurora::IO::Net
         bool     Failed() override;
         AuUInt   GetOSErrorCode() override;
 
+        bool     HasCompleted() override;
+
         AuUInt32 GetLastPacketLength() override;
 
         void SetCallback(const AuSPtr<IAsyncFinishedSubscriber> &sub) override;
diff --git a/Source/IO/Net/AuNetStream.NT.cpp b/Source/IO/Net/AuNetStream.NT.cpp
index d6765d76..a18f5db3 100644
--- a/Source/IO/Net/AuNetStream.NT.cpp
+++ b/Source/IO/Net/AuNetStream.NT.cpp
@@ -362,6 +362,12 @@ namespace Aurora::IO::Net
             this->dwOsErrorCode != ERROR_HANDLE_EOF;
     }
 
+    bool NtAsyncNetworkTransaction::HasCompleted()
+    {
+        return this->bHasFailed ||
+            this->dwLastBytes;
+    }
+
     AuUInt   NtAsyncNetworkTransaction::GetOSErrorCode()
     {
         return this->dwOsErrorCode;
diff --git a/Source/IO/Net/AuNetStream.NT.hpp b/Source/IO/Net/AuNetStream.NT.hpp
index 9b0950b1..1b3b5269 100644
--- a/Source/IO/Net/AuNetStream.NT.hpp
+++ b/Source/IO/Net/AuNetStream.NT.hpp
@@ -24,14 +24,16 @@ namespace Aurora::IO::Net
         bool     StartRead(AuUInt64 offset, const AuSPtr<AuMemoryViewWrite> &memoryView) override;
         bool     StartWrite(AuUInt64 offset, const AuSPtr<AuMemoryViewRead> &memoryView) override;
 
-        bool     Complete() override;
-
         bool     CompleteEx(AuUInt completeRoutine, bool bForce = false);
 
+        bool     Complete() override;
+
         bool     Failed() override;
         bool     HasErrorCode();
         AuUInt   GetOSErrorCode() override;
 
+        bool     HasCompleted() override;
+
         AuUInt32 GetLastPacketLength() override;
 
         void SetCallback(const AuSPtr<IAsyncFinishedSubscriber> &sub) override;