PowerShell · daxian-dbw · Oct 30, 2025 · Oct 29, 2025 · Oct 30, 2025
diff --git a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/Var.cs b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/Var.cs
@@ -697,7 +697,6 @@ public SwitchParameter PassThru
         /// Gets whether we will append to the variable if it exists.
         /// </summary>
         [Parameter]
-        [Experimental(ExperimentalFeature.PSRedirectToVariable, ExperimentAction.Show)]
         public SwitchParameter Append { get; set; }
 
         private bool _nameIsFormalParameter;

diff --git a/src/System.Management.Automation/engine/ExperimentalFeature/ExperimentalFeature.cs b/src/System.Management.Automation/engine/ExperimentalFeature/ExperimentalFeature.cs
@@ -22,8 +22,6 @@ public class ExperimentalFeature
 
         internal const string EngineSource = "PSEngine";
         internal const string PSFeedbackProvider = "PSFeedbackProvider";
-        internal const string PSNativeWindowsTildeExpansion = nameof(PSNativeWindowsTildeExpansion);
-        internal const string PSRedirectToVariable = "PSRedirectToVariable";
         internal const string PSSerializeJSONLongEnumAsNumber = nameof(PSSerializeJSONLongEnumAsNumber);
 
         #endregion
@@ -107,21 +105,12 @@ static ExperimentalFeature()
                     name: "PSFileSystemProviderV2",
                     description: "Replace the old FileSystemProvider with cleaner design and faster code"),
                 */
-                new ExperimentalFeature(
-                    name: "PSSubsystemPluginModel",
-                    description: "A plugin model for registering and un-registering PowerShell subsystems"),
                 new ExperimentalFeature(
                     name: "PSLoadAssemblyFromNativeCode",
                     description: "Expose an API to allow assembly loading from native code"),
                 new ExperimentalFeature(
                     name: PSFeedbackProvider,
                     description: "Replace the hard-coded suggestion framework with the extensible feedback provider"),
-                new ExperimentalFeature(
-                    name: PSNativeWindowsTildeExpansion,
-                    description: "On Windows, expand unquoted tilde (`~`) with the user's current home folder."),
-                new ExperimentalFeature(
-                    name: PSRedirectToVariable,
-                    description: "Add support for redirecting to the variable drive"),
                 new ExperimentalFeature(
                     name: PSSerializeJSONLongEnumAsNumber,
                     description: "Serialize enums based on long or ulong as an numeric value rather than the string representation when using ConvertTo-Json."

diff --git a/src/System.Management.Automation/engine/InitialSessionState.cs b/src/System.Management.Automation/engine/InitialSessionState.cs
@@ -5478,6 +5478,7 @@ private static void InitializeCoreCmdletsAndProviders(
                 { "Get-Module",                        new SessionStateCmdletEntry("Get-Module", typeof(GetModuleCommand), helpFile) },
                 { "Get-PSHostProcessInfo",             new SessionStateCmdletEntry("Get-PSHostProcessInfo", typeof(GetPSHostProcessInfoCommand), helpFile) },
                 { "Get-PSSession",                     new SessionStateCmdletEntry("Get-PSSession", typeof(GetPSSessionCommand), helpFile) },
+                { "Get-PSSubsystem",                   new SessionStateCmdletEntry("Get-PSSubsystem", typeof(Subsystem.GetPSSubsystemCommand), helpFile) },
                 { "Import-Module",                     new SessionStateCmdletEntry("Import-Module", typeof(ImportModuleCommand), helpFile) },
                 { "Invoke-Command",                    new SessionStateCmdletEntry("Invoke-Command", typeof(InvokeCommandCommand), helpFile) },
                 { "Invoke-History",                    new SessionStateCmdletEntry("Invoke-History", typeof(InvokeHistoryCommand), helpFile) },
@@ -5518,11 +5519,6 @@ private static void InitializeCoreCmdletsAndProviders(
                 { "Format-Default",                    new SessionStateCmdletEntry("Format-Default", typeof(FormatDefaultCommand), helpFile) },
             };
 
-            if (ExperimentalFeature.IsEnabled("PSSubsystemPluginModel"))
-            {
-                cmdlets.Add("Get-PSSubsystem", new SessionStateCmdletEntry("Get-PSSubsystem", typeof(Subsystem.GetPSSubsystemCommand), helpFile));
-            }
-
 #if UNIX
             cmdlets.Add("Switch-Process", new SessionStateCmdletEntry("Switch-Process", typeof(SwitchProcessCommand), helpFile));
 #endif

diff --git a/src/System.Management.Automation/engine/NativeCommandParameterBinder.cs b/src/System.Management.Automation/engine/NativeCommandParameterBinder.cs
@@ -406,12 +406,9 @@ private void PossiblyGlobArg(string arg, CommandParameterInternal parameter, boo
                 }
             }
 #else
-            if (!usedQuotes && ExperimentalFeature.IsEnabled(ExperimentalFeature.PSNativeWindowsTildeExpansion))
+            if (!usedQuotes && ExpandTilde(arg, parameter))
             {
-                if (ExpandTilde(arg, parameter))
-                {
-                    argExpanded = true;
-                }
+                argExpanded = true;
             }
 #endif
 

diff --git a/src/System.Management.Automation/engine/Subsystem/Commands/GetPSSubsystemCommand.cs b/src/System.Management.Automation/engine/Subsystem/Commands/GetPSSubsystemCommand.cs
@@ -8,7 +8,6 @@ namespace System.Management.Automation.Subsystem
     /// <summary>
     /// Implementation of 'Get-PSSubsystem' cmdlet.
     /// </summary>
-    [Experimental("PSSubsystemPluginModel", ExperimentAction.Show)]
     [Cmdlet(VerbsCommon.Get, "PSSubsystem", DefaultParameterSetName = AllSet)]
     [OutputType(typeof(SubsystemInfo))]
     public sealed class GetPSSubsystemCommand : PSCmdlet

diff --git a/src/System.Management.Automation/engine/runtime/Operations/MiscOps.cs b/src/System.Management.Automation/engine/runtime/Operations/MiscOps.cs
@@ -1092,14 +1092,11 @@ internal override void Bind(PipelineProcessor pipelineProcessor, CommandProcesso
         {
             // Check first to see if File is a variable path. If so, we'll not create the FileBytePipe
             bool redirectToVariable = false;
-            if (ExperimentalFeature.IsEnabled(ExperimentalFeature.PSRedirectToVariable))
+
+            context.SessionState.Path.GetUnresolvedProviderPathFromPSPath(File, out ProviderInfo p, out _);
+            if (p != null && p.NameEquals(context.ProviderNames.Variable))
             {
-                ProviderInfo p;
-                context.SessionState.Path.GetUnresolvedProviderPathFromPSPath(File, out p, out _);
-                if (p != null && p.NameEquals(context.ProviderNames.Variable))
-                {
-                    redirectToVariable = true;
-                }
+                redirectToVariable = true;
             }
 
             if (commandProcessor is NativeCommandProcessor nativeCommand
@@ -1223,12 +1220,10 @@ internal Pipe GetRedirectionPipe(ExecutionContext context, PipelineProcessor par
 
             // determine whether we're trying to set a variable by inspecting the file path
             // if we can determine that it's a variable, we'll use Set-Variable rather than Out-File
-            ProviderInfo p;
-            PSDriveInfo d;
             CommandProcessorBase commandProcessor;
-            var name = context.SessionState.Path.GetUnresolvedProviderPathFromPSPath(File, out p, out d);
+            var name = context.SessionState.Path.GetUnresolvedProviderPathFromPSPath(File, out ProviderInfo p, out _);
 
-            if (ExperimentalFeature.IsEnabled(ExperimentalFeature.PSRedirectToVariable) && p != null && p.NameEquals(context.ProviderNames.Variable))
+            if (p != null && p.NameEquals(context.ProviderNames.Variable))
             {
                 commandProcessor = context.CreateCommand("Set-Variable", false);
                 Diagnostics.Assert(commandProcessor != null, "CreateCommand returned null");

diff --git a/test/powershell/Language/Parser/RedirectionOperator.Tests.ps1 b/test/powershell/Language/Parser/RedirectionOperator.Tests.ps1
@@ -127,12 +127,6 @@ Describe "File redirection should have 'DoComplete' called on the underlying pip
 Describe "Redirection and Set-Variable -append tests" -tags CI {
     Context "variable redirection should work" {
         BeforeAll {
-            if ( $EnabledExperimentalFeatures -contains "PSRedirectToVariable" ) {
-                $skipTest = $false
-            }
-            else {
-                $skipTest = $true
-            }
             $testCases = @{ Name = "Variable should be created"; scriptBlock = { 1..3>variable:a }; Validation = { ($a -join "") | Should -Be ((1..3) -join "") } },
                 @{ Name = "variable should be appended"; scriptBlock = {1..3>variable:a; 4..6>>variable:a}; Validation = { ($a -join "") | Should -Be ((1..6) -join "")}},
                 @{ Name = "variable should maintain type"; scriptBlock = {@{one=1}>variable:a};Validation = {$a | Should -BeOfType [hashtable]}},
@@ -220,7 +214,7 @@ Describe "Redirection and Set-Variable -append tests" -tags CI {
 
 
         }
-        It "<name>" -TestCases $testCases -skip:$skipTest {
+        It "<name>" -TestCases $testCases {
             param ( $scriptBlock, $validation )
             . $scriptBlock
             . $validation

diff --git a/test/powershell/Language/Scripting/NativeExecution/NativeWindowsTildeExpansion.Tests.ps1 b/test/powershell/Language/Scripting/NativeExecution/NativeWindowsTildeExpansion.Tests.ps1
@@ -5,7 +5,6 @@ Describe 'Native Windows tilde expansion tests' -tags "CI" {
     BeforeAll {
         $originalDefaultParams = $PSDefaultParameterValues.Clone()
         $PSDefaultParameterValues["it:skip"] = -Not $IsWindows
-        $EnabledExperimentalFeatures.Contains('PSNativeWindowsTildeExpansion') | Should -BeTrue
     }
 
     AfterAll {
@@ -21,12 +20,13 @@ Describe 'Native Windows tilde expansion tests' -tags "CI" {
         cmd /c echo ~/foo | Should -BeExactly "$($ExecutionContext.SessionState.Provider.Get("FileSystem").Home)/foo"
         cmd /c echo ~\foo | Should -BeExactly "$($ExecutionContext.SessionState.Provider.Get("FileSystem").Home)\foo"
     }
-	It '~ should not be replaced when quoted' {
-		cmd /c echo '~' | Should -BeExactly '~'
-		cmd /c echo "~" | Should -BeExactly '~'
-		cmd /c echo '~/foo' | Should -BeExactly '~/foo'
-		cmd /c echo "~/foo" | Should -BeExactly '~/foo'
+
+    It '~ should not be replaced when quoted' {
+        cmd /c echo '~' | Should -BeExactly '~'
+        cmd /c echo "~" | Should -BeExactly '~'
+        cmd /c echo '~/foo' | Should -BeExactly '~/foo'
+        cmd /c echo "~/foo" | Should -BeExactly '~/foo'
         cmd /c echo '~\foo' | Should -BeExactly '~\foo'
-		cmd /c echo "~\foo" | Should -BeExactly '~\foo'
-	}
+        cmd /c echo "~\foo" | Should -BeExactly '~\foo'
+    }
 }
diff --git a/test/powershell/Modules/Microsoft.PowerShell.Utility/Set-Variable.Tests.ps1 b/test/powershell/Modules/Microsoft.PowerShell.Utility/Set-Variable.Tests.ps1
@@ -244,44 +244,30 @@ Describe "Set-Variable" -Tags "CI" {
 
     Context "Set-Variable -Append tests" {
         BeforeAll {
-            if (! (Get-ExperimentalFeature PSRedirectToVariable).Enabled) {
-				$skipTest = $true
-			}
-
-			$testCases = @{ value = 2; Count = 2 },
-				@{ value = @(2,3,4); Count = 2},
-				@{ value = "abc",(Get-Process -Id $PID) ; count = 2}
+            $testCases = @{ value = 2; Count = 2 },
+                @{ value = @(2,3,4); Count = 2},
+                @{ value = "abc",(Get-Process -Id $PID) ; count = 2}
         }
 
-		It "Can append values <value> to a variable" -testCases $testCases {
-			param ($value, $count)
-
-			if ($skipTest) {
-				Set-ItResult -skip -because "Experimental Feature PSRedirectToVariable not enabled"
-				return
-			}
-
-			$variableName = "testVar"
-			Set-Variable -Name $variableName -Value 1
-			Set-Variable -Name $variableName -Value $value -Append
+        It "Can append values <value> to a variable" -testCases $testCases {
+            param ($value, $count)
 
-			$observedValues = Get-Variable $variableName -Value
+            $variableName = "testVar"
+            Set-Variable -Name $variableName -Value 1
+            Set-Variable -Name $variableName -Value $value -Append
 
-			$observedValues.Count | Should -Be $count
-			$observedValues[0] | Should -Be 1
+            $observedValues = Get-Variable $variableName -Value
 
-			$observedValues[1] | Should -Be $value
-		}
+            $observedValues.Count | Should -Be $count
+            $observedValues[0] | Should -Be 1
 
-		It "Can use set-variable via streaming and append values" {
-			if ($skipTest) {
-				Set-ItResult -skip -because "Experimental Feature PSRedirectToVariable not enabled"
-				return
-			}
+            $observedValues[1] | Should -Be $value
+        }
 
-			$testVar = 1
-			4..6 | Set-Variable -Name testVar -Append
-			$testVar | Should -Be @(1,4,5,6)
-		}
+        It "Can use set-variable via streaming and append values" {
+            $testVar = 1
+            4..6 | Set-Variable -Name testVar -Append
+            $testVar | Should -Be @(1,4,5,6)
+        }
     }
 }
diff --git a/test/powershell/engine/Basic/DefaultCommands.Tests.ps1 b/test/powershell/engine/Basic/DefaultCommands.Tests.ps1
@@ -337,6 +337,7 @@ Describe "Verify aliases and cmdlets" -Tags "CI" {
 "Cmdlet",       "Get-PSSessionCapability",          "",                                 $($FullCLR -or $CoreWindows              ),     "",                     "",                     "None"
 "Cmdlet",       "Get-PSSessionConfiguration",       "",                                 $($FullCLR -or $CoreWindows              ),     "",                     "",                     "None"
 "Cmdlet",       "Get-PSSnapin",                     "",                                 $($FullCLR                               ),     "",                     "",                     ""
+"Cmdlet",       "Get-PSSubsystem",                  "",                                 $(             $CoreWindows -or $CoreUnix),     "",                     "",                     "None"
 "Cmdlet",       "Get-Random",                       "",                                 $($FullCLR -or $CoreWindows -or $CoreUnix),     "",                     "",                     "None"
 "Cmdlet",       "Get-Runspace",                     "",                                 $($FullCLR -or $CoreWindows -or $CoreUnix),     "",                     "",                     "None"
 "Cmdlet",       "Get-RunspaceDebug",                "",                                 $($FullCLR -or $CoreWindows -or $CoreUnix),     "",                     "",                     "None"

@@ -1,9 +1,6 @@
 {
   "ExperimentalFeatures": {
     "ExpTest.FeatureOne": [ "test/powershell/engine/ExperimentalFeature/ExperimentalFeature.Basic.Tests.ps1" ],
-    "PSCultureInvariantReplaceOperator": [ "test/powershell/Language/Operators/ReplaceOperator.Tests.ps1" ],
-    "Microsoft.PowerShell.Utility.PSManageBreakpointsInRunspace": [ "test/powershell/Modules/Microsoft.PowerShell.Utility/RunspaceBreakpointManagement.Tests.ps1" ],
-    "PSNativeWindowsTildeExpansion": [ "test/powershell/Language/Scripting/NativeExecution/NativeWindowsTildeExpansion.Tests.ps1" ],
     "PSSerializeJSONLongEnumAsNumber": [ "test/powershell/Modules/Microsoft.PowerShell.Utility/ConvertTo-Json.PSSerializeJSONLongEnumAsNumber.Tests.ps1" ]
   }
 }