diff --git a/.gitattributes b/.gitattributes
index 7f4524b7..f4896249 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -96,3 +96,7 @@ tests/NativeProviderConfigure.Windows.Tests.ps1 text eol=lf
 /modules/WecSubscriptionInventory.cs text eol=lf
 /tests/WecCollectorObservation* text eol=lf
 /tests/WecSubscriptionInventory* text eol=lf
+
+# Public filesystem-SACL disposable lifecycle evidence.
+tests/FileSaclProfileFixture.cs text eol=lf
+tests/FileSaclLifecycle.Windows.Tests.ps1 text eol=lf
diff --git a/.github/workflows/filesystem-sacl-lifecycle.yml b/.github/workflows/filesystem-sacl-lifecycle.yml
new file mode 100644
index 00000000..7ce9b882
--- /dev/null
+++ b/.github/workflows/filesystem-sacl-lifecycle.yml
@@ -0,0 +1,43 @@
+name: Native public filesystem SACL lifecycle
+on:
+  push:
+    branches: ['**']
+    paths:
+      - 'tests/FileSacl*'
+      - 'tests/RegistrySaclFixtureNative.cs'
+      - 'tests/SelectedSaclFixtureProtection.cs'
+      - 'scripts/SelectedSacl*'
+      - 'scripts/TargetedSaclPlanning.ps1'
+      - 'scripts/FileAccessProbe*'
+      - 'WELA.ps1'
+      - '.github/workflows/filesystem-sacl-lifecycle.yml'
+  pull_request:
+  workflow_dispatch:
+permissions:
+  contents: read
+jobs:
+  filesystem-sacl-lifecycle:
+    timeout-minutes: 25
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [windows-2022, windows-2025]
+        engine: [powershell, pwsh]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
+      - name: Owned public filesystem lifecycle in Windows PowerShell 5.1
+        if: matrix.engine == 'powershell'
+        shell: powershell
+        run: ./tests/FileSaclLifecycle.Windows.Tests.ps1 -AllowDisposableProfileWrite
+      - name: Owned public filesystem lifecycle in PowerShell 7
+        if: matrix.engine == 'pwsh'
+        shell: pwsh
+        run: ./tests/FileSaclLifecycle.Windows.Tests.ps1 -AllowDisposableProfileWrite
+      - name: Retain public receipts and exact owned-fixture cleanup
+        if: always()
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
+        with:
+          name: filesystem-sacl-${{ matrix.os }}-${{ matrix.engine }}
+          path: ${{ runner.temp }}/wela-filesystem-lifecycle-*/
+          if-no-files-found: error
diff --git a/tests/FileSaclLifecycle.Windows.Tests.ps1 b/tests/FileSaclLifecycle.Windows.Tests.ps1
new file mode 100644
index 00000000..10452ba8
--- /dev/null
+++ b/tests/FileSaclLifecycle.Windows.Tests.ps1
@@ -0,0 +1,54 @@
+# Mutating fixture only: public WELA never registers profiles or loads hives.
+param([switch]$AllowDisposableProfileWrite)
+$ErrorActionPreference='Stop'
+if(-not $AllowDisposableProfileWrite -or $env:GITHUB_ACTIONS -ne 'true' -or $env:RUNNER_ENVIRONMENT -ne 'github-hosted' -or [Environment]::OSVersion.Platform -ne [PlatformID]::Win32NT -or -not [Environment]::Is64BitProcess){throw 'Explicit disposable hosted native Windows fixture only.'}
+$script:ScriptRoot=Split-Path $PSScriptRoot -Parent
+Import-Module (Join-Path $script:ScriptRoot 'modules/AuditProfiles.psm1') -ErrorAction Stop
+foreach($name in @('Configuration','WefArrival','WmiProbe','ChannelRead','SelectedSaclConfiguration','FileAccessProbe')){. (Join-Path $script:ScriptRoot ('scripts/'+$name+'.ps1'))}
+Initialize-WelaWmiProbeNative
+Add-Type -Path (Join-Path $PSScriptRoot 'RegistrySaclFixtureNative.cs') -ErrorAction Stop
+Add-Type -Path (Join-Path $PSScriptRoot 'FileSaclProfileFixture.cs') -ErrorAction Stop
+$nonce=[guid]::NewGuid().ToString('N')
+$evidence=New-WelaArrivalOutput (Join-Path $env:RUNNER_TEMP ('wela-filesystem-lifecycle-'+$nonce)) $script:ScriptRoot
+$targetRoot=New-WelaArrivalOutput (Join-Path (Join-Path $env:SystemRoot 'Temp') ('wela-filesystem-sacl-'+$nonce)) $script:ScriptRoot
+$files=Join-Path $evidence 'owned-hive-files';$null=New-Item -ItemType Directory $files
+function Save([string]$Name,$Value){[IO.File]::WriteAllText((Join-Path $evidence $Name),(ConvertTo-Json -InputObject $Value -Depth 32),[Text.UTF8Encoding]::new($false))}
+function Key($Value){ConvertTo-Json -InputObject $Value -Depth 32 -Compress}
+function Hives {@([Microsoft.Win32.Registry]::Users.GetSubKeyNames()|Sort-Object)}
+$script:assertions=0
+function Assert($Condition,[string]$Message){if(-not $Condition){throw $Message};$script:assertions++}
+$beforeProfiles=[Wela.FileSaclFixture.Profile]::Snapshot();$beforeHives=Hives;$beforeToken=[Wela.WmiProbe.Native]::Snapshot()
+$beforeMasks=Get-WelaEffectiveAuditPolicy;$precedencePath='HKLM:\SYSTEM\CurrentControlSet\Control\Lsa';$precedenceName='SCENoApplyLegacyAuditPolicy';$beforePrecedence=Get-WelaRegistryState $precedencePath $precedenceName
+Save 'before-profiles.json' $beforeProfiles;Save 'before-hives.json' $beforeHives;Save 'before-token.json' $beforeToken;Save 'before-masks.json' $beforeMasks;Save 'before-precedence.json' $beforePrecedence
+$hive=[Wela.RegistrySaclFixture.Hive]::new($nonce,(Join-Path $files 'owned.dat'));$profile=$null;$failure=$null;$cleanupErrors=@()
+try {
+    $hive.Prepare();$profile=[Wela.FileSaclFixture.Profile]::new($nonce,$hive.Sid,$targetRoot);$profile.Prepare()
+    $signal=Join-Path $profile.AppDataPath 'Signal';$null=New-Item -ItemType Directory $signal
+    $context=Get-WelaSelectedSaclContext
+    $catalog=Get-WelaSelectedSaclCatalog -Profile 'asd-native-2021-10' -IncludeOptional -Context $context
+    Save 'catalog.json' $catalog;Save 'owned-profile.json' ([pscustomobject]@{Sid=$hive.Sid;Nonce=$nonce;Root=$targetRoot;ProfilePath=$profile.ProfilePath;AppDataPath=$profile.AppDataPath;SelectedPath=$signal})
+    $selected=@($catalog.Rows|Where-Object {$_.Definition.UserSid -ceq $hive.Sid -and $_.Definition.Kind -ceq 'FileSystem' -and $_.Definition.Path -ieq $signal})
+    Assert ($selected.Count -eq 1 -and $selected[0].Definition.Resolution -ceq 'Redirected') 'Real built-in catalog resolves exactly the owned redirected Signal folder.'
+    Assert ($selected[0].Definition.PrincipalSid -ceq 'S-1-1-0' -and @($selected[0].Definition.Rights).Count -eq 1 -and $selected[0].Definition.Rights[0] -ceq 'ReadData') 'Owned fixture uses the unchanged built-in read target.'
+    Assert ((Key (Hives)) -ceq (Key (@($beforeHives)+$hive.Sid|Sort-Object))) 'Only the owned hive was mounted.'
+    $profile.AssertOwned();$hive.AssertOwned()
+    Assert (([Wela.FileSaclFixture.Profile]::Snapshot()).Children.Count -eq $beforeProfiles.Children.Count+1) 'Exactly one marker-owned profile entry was registered.'
+    Assert ((Key ([Wela.WmiProbe.Native]::Snapshot())) -ceq (Key $beforeToken)) 'Fixture profile/hive preparation restores full token state.'
+}catch{$failure=$_}finally{
+    try{if($profile){$profile.Dispose()}}catch{$cleanupErrors+='Profile removal: '+$_.Exception.Message}
+    try{$hive.Dispose()}catch{$cleanupErrors+='Hive unload/seed removal: '+$_.Exception.Message}
+    $afterProfiles=$null;$afterHives=$null;$afterToken=$null;$afterMasks=$null;$afterPrecedence=$null
+    $profilesOk=$false;$hivesOk=$false;$tokenOk=$false;$masksOk=$false;$precedenceOk=$false
+    try{$afterProfiles=[Wela.FileSaclFixture.Profile]::Snapshot();$profilesOk=(Key $afterProfiles) -ceq (Key $beforeProfiles)}catch{$cleanupErrors+='Profile verification: '+$_.Exception.Message}
+    try{$afterHives=Hives;$hivesOk=(Key $afterHives) -ceq (Key $beforeHives)}catch{$cleanupErrors+='Hive verification: '+$_.Exception.Message}
+    try{$afterToken=[Wela.WmiProbe.Native]::Snapshot();$tokenOk=(Key $afterToken) -ceq (Key $beforeToken)}catch{$cleanupErrors+='Token verification: '+$_.Exception.Message}
+    try{$afterMasks=Get-WelaEffectiveAuditPolicy;$masksOk=(Key ($afterMasks.GetEnumerator()|Sort-Object Key)) -ceq (Key ($beforeMasks.GetEnumerator()|Sort-Object Key))}catch{$cleanupErrors+='Audit verification: '+$_.Exception.Message}
+    try{$afterPrecedence=Get-WelaRegistryState $precedencePath $precedenceName;$precedenceOk=(Key $afterPrecedence) -ceq (Key $beforePrecedence)}catch{$cleanupErrors+='Precedence verification: '+$_.Exception.Message}
+    if($profilesOk -and $hivesOk -and -not $hive.Loaded){try{Remove-Item -LiteralPath $targetRoot -Recurse -Force -ErrorAction Stop;Remove-Item -LiteralPath $files -Recurse -Force -ErrorAction Stop}catch{$cleanupErrors+='Owned file removal: '+$_.Exception.Message}}
+    $cleanup=[pscustomobject]@{Complete=($profilesOk -and $hivesOk -and $tokenOk -and $masksOk -and $precedenceOk -and -not $hive.Loaded -and -not $hive.SeedCreated -and -not(Test-Path $targetRoot) -and -not(Test-Path $files) -and $cleanupErrors.Count -eq 0);ProfilesRestored=$profilesOk;HivesRestored=$hivesOk;TokenRestored=$tokenOk;AuditMasksCompared=$beforeMasks.Count;AuditMasksRestored=$masksOk;PrecedenceRestored=$precedenceOk;HiveUnloaded=(-not $hive.Loaded);SeedRemoved=(-not $hive.SeedCreated);FilesRemoved=(-not(Test-Path $targetRoot) -and -not(Test-Path $files));Errors=$cleanupErrors;Failure=$(if($failure){$failure.Exception.Message}else{$null});Assertions=$script:assertions;AfterProfiles=$afterProfiles;AfterHives=$afterHives;AfterToken=$afterToken;AfterMasks=$afterMasks;AfterPrecedence=$afterPrecedence}
+    Save 'cleanup.json' $cleanup
+    Save 'artifact-hashes.json' @(Get-ChildItem -LiteralPath $evidence -Recurse -File|Where-Object Name -ne 'artifact-hashes.json'|Sort-Object FullName|ForEach-Object {[pscustomobject]@{Name=$_.FullName.Substring($evidence.Length+1).Replace('\','/');Sha256=(Get-FileHash -LiteralPath $_.FullName -Algorithm SHA256).Hash.ToLowerInvariant()}})
+}
+if($failure){throw $failure};if(-not $cleanup.Complete){throw ('Owned profile fixture cleanup incomplete: '+(Key $cleanup))}
+Write-Host "Passed $script:assertions owned native profile substrate assertions; cleanup confirmed. Evidence: $evidence"
+$global:LASTEXITCODE=0
diff --git a/tests/FileSaclProfileFixture.cs b/tests/FileSaclProfileFixture.cs
new file mode 100644
index 00000000..894ac80c
--- /dev/null
+++ b/tests/FileSaclProfileFixture.cs
@@ -0,0 +1,86 @@
+// Disposable hosted-test setup only. Never imported by WELA product commands.
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.IO;
+using System.Runtime.InteropServices;
+using Microsoft.Win32;
+using Microsoft.Win32.SafeHandles;
+namespace Wela.FileSaclFixture {
+ public sealed class ValueState {public string Name,Kind;public object Value;}
+ public sealed class KeyState {public string Name;public ValueState[] Values;public KeyState[] Children;}
+ public sealed class Profile : IDisposable {
+  const string ProfileList=@"SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList";
+  const string ShellFolders=@"Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders";
+  [DllImport("advapi32.dll",CharSet=CharSet.Unicode,ExactSpelling=true)] static extern int RegCreateKeyExW(IntPtr root,string path,int reserved,string cls,uint options,uint access,IntPtr security,out IntPtr result,out uint disposition);
+  [DllImport("advapi32.dll")] static extern int RegCloseKey(IntPtr key);
+  public readonly string Nonce,Sid,Root,ProfilePath,AppDataPath;
+  public bool Created {get;private set;}
+  public Profile(string nonce,string sid,string root) {
+   if(Environment.OSVersion.Platform!=PlatformID.Win32NT||!Environment.Is64BitProcess||Environment.GetEnvironmentVariable("GITHUB_ACTIONS")!="true"||Environment.GetEnvironmentVariable("RUNNER_ENVIRONMENT")!="github-hosted")throw new InvalidOperationException("Disposable native hosted Windows fixture only.");
+   if(!System.Text.RegularExpressions.Regex.IsMatch(nonce??"","^[a-f0-9]{32}$"))throw new InvalidOperationException("Exact owned nonce required.");
+   string expectedSid="S-1-5-21-"+Convert.ToUInt32(nonce.Substring(0,8),16)+"-"+Convert.ToUInt32(nonce.Substring(8,8),16)+"-"+Convert.ToUInt32(nonce.Substring(16,8),16)+"-1001";
+   if(sid!=expectedSid)throw new InvalidOperationException("Profile must use the matching owned hive SID.");
+   string expectedRoot=Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Windows),"Temp","wela-filesystem-sacl-"+nonce);
+   if(!String.Equals(Path.GetFullPath(root),expectedRoot,StringComparison.OrdinalIgnoreCase))throw new InvalidOperationException("Only the nonce-owned system-volume fixture tree is supported.");
+   AssertOrdinary(root);Nonce=nonce;Sid=sid;Root=Path.GetFullPath(root);ProfilePath=Path.Combine(Root,"Profile");AppDataPath=Path.Combine(Root,"RedirectedRoaming");
+  }
+  static void AssertOrdinary(string path) {
+   for(DirectoryInfo directory=new DirectoryInfo(path);directory!=null;directory=directory.Parent)
+    if(!directory.Exists||(directory.Attributes&FileAttributes.ReparsePoint)!=0)throw new InvalidOperationException("Fixture tree or ancestor is absent or a reparse point.");
+  }
+  public static KeyState Snapshot() {
+   int count=0;using(RegistryKey machine=RegistryKey.OpenBaseKey(RegistryHive.LocalMachine,RegistryView.Registry64))
+   using(RegistryKey root=machine.OpenSubKey(ProfileList,false)){if(root==null)throw new InvalidOperationException("Actual ProfileList is missing.");return Read(root,"ProfileList",0,ref count);}
+  }
+  static KeyState Read(RegistryKey key,string name,int depth,ref int count) {
+   if(depth>8||++count>4096)throw new InvalidOperationException("Profile inventory exceeds its bounded scope.");
+   string[] names=key.GetValueNames();Array.Sort(names,StringComparer.Ordinal);if(names.Length>256)throw new InvalidOperationException("Profile values exceed fixture bound.");
+   var values=new List<ValueState>();foreach(string valueName in names){
+    RegistryValueKind kind=key.GetValueKind(valueName);object value=key.GetValue(valueName,null,RegistryValueOptions.DoNotExpandEnvironmentNames);
+    if(value==null||kind==RegistryValueKind.Unknown||kind==RegistryValueKind.None)throw new InvalidOperationException("Unknown typed profile value.");
+    if(value is string&&((string)value).Length>1048576||value is byte[]&&((byte[])value).Length>1048576)throw new InvalidOperationException("Profile value exceeds fixture bound.");
+    values.Add(new ValueState{Name=valueName,Kind=kind.ToString(),Value=value});
+   }
+   string[] children=key.GetSubKeyNames();Array.Sort(children,StringComparer.Ordinal);var result=new List<KeyState>();
+   foreach(string child in children)using(RegistryKey opened=key.OpenSubKey(child,false)){if(opened==null)throw new InvalidOperationException("Profile inventory changed.");result.Add(Read(opened,child,depth+1,ref count));}
+   return new KeyState{Name=name,Values=values.ToArray(),Children=result.ToArray()};
+  }
+  void AssertHive() {
+   using(RegistryKey hive=Registry.Users.OpenSubKey(Sid,false))
+    if(hive==null||hive.GetValueKind("WelaFixtureOwner")!=RegistryValueKind.String||!String.Equals(hive.GetValue("WelaFixtureOwner") as string,Nonce,StringComparison.Ordinal))throw new InvalidOperationException("Owned hive marker differs.");
+  }
+  public void Prepare() {
+   if(Created)throw new InvalidOperationException("Profile was already prepared.");AssertHive();AssertOrdinary(Root);
+   Directory.CreateDirectory(ProfilePath);Directory.CreateDirectory(AppDataPath);
+   IntPtr handle;uint disposition;int error=RegCreateKeyExW(new IntPtr(unchecked((int)0x80000002)),ProfileList+"\\"+Sid,0,null,0,0xF013F,IntPtr.Zero,out handle,out disposition);
+   if(error!=0)throw new Win32Exception(error,"Create owned ProfileList entry");
+   try{
+    if(disposition!=1)throw new InvalidOperationException("ProfileList identity already exists.");Created=true;
+    using(var safe=new SafeRegistryHandle(handle,false))using(RegistryKey key=RegistryKey.FromHandle(safe,RegistryView.Registry64)){
+     key.SetValue("WelaFixtureOwner",Nonce,RegistryValueKind.String);
+     key.SetValue("ProfileImagePath",ProfilePath,RegistryValueKind.ExpandString);key.Flush();
+    }
+   }finally{RegCloseKey(handle);}
+   AssertHive();
+   using(RegistryKey hive=Registry.Users.OpenSubKey(Sid,true))using(RegistryKey shell=hive.CreateSubKey(ShellFolders)){
+    if(shell.ValueCount!=0||shell.SubKeyCount!=0)throw new InvalidOperationException("Owned known-folder key unexpectedly contains data.");
+    shell.SetValue("AppData",AppDataPath,RegistryValueKind.ExpandString);
+    shell.SetValue("Startup",@"%USERPROFILE%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup",RegistryValueKind.ExpandString);shell.Flush();
+   }
+   AssertOwned();
+  }
+  public void AssertOwned() {
+   AssertHive();
+   using(RegistryKey machine=RegistryKey.OpenBaseKey(RegistryHive.LocalMachine,RegistryView.Registry64))
+   using(RegistryKey key=machine.OpenSubKey(ProfileList+"\\"+Sid,false)){
+    if(!Created||key==null||key.SubKeyCount!=0||key.ValueCount!=2||key.GetValueKind("WelaFixtureOwner")!=RegistryValueKind.String||!String.Equals(key.GetValue("WelaFixtureOwner") as string,Nonce,StringComparison.Ordinal)||key.GetValueKind("ProfileImagePath")!=RegistryValueKind.ExpandString||!String.Equals(key.GetValue("ProfileImagePath",null,RegistryValueOptions.DoNotExpandEnvironmentNames) as string,ProfilePath,StringComparison.Ordinal))throw new InvalidOperationException("Owned ProfileList entry changed; removal is refused.");
+   }
+  }
+  public void Dispose() {
+   if(!Created)return;AssertOwned();
+   using(RegistryKey machine=RegistryKey.OpenBaseKey(RegistryHive.LocalMachine,RegistryView.Registry64))
+   using(RegistryKey root=machine.OpenSubKey(ProfileList,true)){root.DeleteSubKey(Sid,true);Created=false;}
+  }
+ }
+}