chore(unreal): U2 -- owner's four-generator plan staged; owner_world.json re-exported

Owner re-saved strates 2026-10-26: DA_Strate1 SurfaceWorld, 2 FloatingIslands,
3 TunnelNetwork, 4 VerticalShafts (default params). BuildHost copies and the
enforced SHA-256 tables updated (old U1 set kept in the report); the export
commandlet handles the four-strate plan; Standalone/data/owner_world.json
regenerated (SHA-256 F42F96AD...). One normal BuildHost gate passed (64/64
tiles) but its top-strate window produced 0 triangles, and a missing
NewDataAsset reference warns -- both to check. No measurements this round.
Report: Standalone/Research/WorldAssemblerM3/Unreal2.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Tools/VoxelForgeTest.ps1

@@ -50,6 +50,8 @@ $EditorExe = Join-Path $EngineRoot 'Engine\Binaries\Win64\UnrealEditor-Cmd.exe'
 $UbtDll = Join-Path $EngineRoot 'Engine\Binaries\DotNET\UnrealBuildTool\UnrealBuildTool.dll'
 $LaunchTimeoutSeconds = 1800
 $UnrealPrivateMemoryLimitBytes = 8GB
+$HostLogicalProcessorLimit = [Math]::Min(12, [Environment]::ProcessorCount)
+$HostProcessorAffinityMask = ([int64]1 -shl $HostLogicalProcessorLimit) - 1
 # The VoxelForge category includes two late, several-minute op-stack sweeps. They remain in
 # the suite; when the serialized aggregate launch reaches this 30-minute guard, validate those
 # named tests with -TestFilter so every test still runs under the standing launch limit.
@@ -99,6 +101,8 @@ $DllEvidence = [ordered]@{
     editor = [ordered]@{ path = Join-Path $StagePlugin 'Binaries\Win64\UnrealEditor-VoxelForgeEditor.dll'; sha256 = $null }
 }
 $LocalAppDataWrites = @()
+$OwnerEditorPidsAtStart = @()
+$LocalAppDataChangesDuringOwnerEditor = $false
 $LocalAppDataRoot = Join-Path ([Environment]::GetFolderPath('LocalApplicationData')) 'UnrealEngine'
 $RunRoot = $null
 $ResultPath = $null
@@ -203,11 +207,10 @@ function ConvertTo-CompactJson($Object) {
 }
 
 function Get-UnrealProcesses {
-    # Get-Process is deliberately the primary guard. Some managed shells deny Win32_Process
-    # command-line inspection, but they still expose the PID/name needed to protect an owner
-    # editor before a launch.
+    # Only commandlet processes conflict with this serialized BuildHost harness. The owner's
+    # interactive UnrealEditor stays open and is never inspected for command-line or touched.
     $rows = @(Get-Process -ErrorAction SilentlyContinue |
-        Where-Object { $_.ProcessName -like 'UnrealEditor*' } |
+        Where-Object { $_.ProcessName -like 'UnrealEditor-Cmd*' } |
         ForEach-Object {
             [pscustomobject]@{
                 ProcessId = [int]$_.Id
@@ -232,7 +235,7 @@ function Assert-NoForeignUnreal([string]$When) {
         $detail = ($processes | ForEach-Object {
             "PID=$($_.pid) Name=$($_.name) Exe=$($_.executable)"
         }) -join '; '
-        throw "UnrealEditor process already exists $When; refusing to touch it: $detail"
+        throw "UnrealEditor-Cmd process already exists $When; refusing to overlap BuildHost launches: $detail"
     }
 }
 
@@ -493,6 +496,11 @@ function Invoke-UnrealLaunch([string]$Kind, [string[]]$Arguments, [string]$LogPa
             try { Stop-Process -Id ([int]$process.Id) -Force -ErrorAction Stop } catch { }
             throw "Could not set owned Unreal PID $($process.Id) to Normal priority: $($_.Exception.Message)"
         }
+        try { $process.ProcessorAffinity = [IntPtr]$HostProcessorAffinityMask }
+        catch {
+            try { Stop-Process -Id ([int]$process.Id) -Force -ErrorAction Stop } catch { }
+            throw "Could not cap owned Unreal PID $($process.Id) to $HostLogicalProcessorLimit logical processors: $($_.Exception.Message)"
+        }
         $ledger.pid = [int]$process.Id
         $wait = Wait-OwnedProcess $process $LaunchTimeoutSeconds -EnforceMemoryLimit
         $ledger.timed_out = [bool]$wait.timed_out
@@ -502,6 +510,22 @@ function Invoke-UnrealLaunch([string]$Kind, [string[]]$Arguments, [string]$LogPa
         $ledger.status = if ($ledger.timed_out) { 'timeout' }
             elseif ($ledger.memory_limit_hit) { 'memory_limit' }
             elseif ($ledger.exit_code -eq 0) { 'passed' } else { 'failed' }
+        if ($Kind -like '*commandlet*') {
+            $completion = @(Select-String -LiteralPath $LogPath `
+                -Pattern 'Commandlet VoxelForgeExploreCommandlet_\d+ finished execution \(result (-?\d+)\)' `
+                -ErrorAction SilentlyContinue | Select-Object -Last 1)
+            if ($completion.Count -eq 0) {
+                $ledger.commandlet_result_code = $null
+                $ledger.commandlet_completion = 'missing'
+                $ledger.status = 'failed'
+            } else {
+                $match = [regex]::Match([string]$completion[0].Line,
+                    'Commandlet VoxelForgeExploreCommandlet_\d+ finished execution \(result (-?\d+)\)')
+                $ledger.commandlet_result_code = [int]$match.Groups[1].Value
+                $ledger.commandlet_completion = 'observed'
+                if ($ledger.commandlet_result_code -ne 0) { $ledger.status = 'failed' }
+            }
+        }
     } catch {
         $ledger.status = 'launch_error'
         $ledger.error = $_.Exception.Message
@@ -552,6 +576,11 @@ function Invoke-BuildProcess([string[]]$Arguments, [string]$LogPath, [string]$Er
             try { Stop-Process -Id ([int]$process.Id) -Force -ErrorAction Stop } catch { }
             throw "Could not set owned build PID $($process.Id) to Normal priority: $($_.Exception.Message)"
         }
+        try { $process.ProcessorAffinity = [IntPtr]$HostProcessorAffinityMask }
+        catch {
+            try { Stop-Process -Id ([int]$process.Id) -Force -ErrorAction Stop } catch { }
+            throw "Could not cap owned build PID $($process.Id) to $HostLogicalProcessorLimit logical processors: $($_.Exception.Message)"
+        }
         $wait = Wait-OwnedProcess $process $LaunchTimeoutSeconds -EnforceMemoryLimit
     } finally {
         if ($null -eq $oldDotnetCliHome) { Remove-Item Env:DOTNET_CLI_HOME -ErrorAction SilentlyContinue } else { $env:DOTNET_CLI_HOME = $oldDotnetCliHome }
@@ -580,10 +609,21 @@ function Invoke-BuildProcess([string[]]$Arguments, [string]$LogPath, [string]$Er
 }
 
 function Copy-DirectoryContents([string]$Source, [string]$Destination) {
+    if (-not (Test-Path -LiteralPath $Source -PathType Container)) {
+        throw "Directory copy source is missing: $Source"
+    }
     Ensure-Directory $Destination
     foreach ($item in @(Get-ChildItem -LiteralPath $Source -Force)) {
         $target = Join-Path $Destination $item.Name
-        $null = Copy-Item -LiteralPath $item.FullName -Destination $target -Recurse -Force -PassThru
+        if (($item.Attributes -band [IO.FileAttributes]::ReparsePoint) -ne 0) {
+            throw "Refusing to stage a linked directory entry: $($item.FullName)"
+        }
+        if ($item.PSIsContainer) {
+            Ensure-Directory $target
+            Copy-DirectoryContents $item.FullName $target
+        } else {
+            $null = Copy-Item -LiteralPath $item.FullName -Destination $target -Force -PassThru
+        }
     }
 }
 
@@ -792,6 +832,7 @@ function New-CommonArguments([string]$Kind, [string]$LogPath, $CvarMap,
     [void]$args.Add('-forcelogflush')
     [void]$args.Add('-NoZenAutoLaunch')
     [void]$args.Add('-notraceserver')
+    [void]$args.Add("-corelimit=$HostLogicalProcessorLimit")
     [void]$args.Add('-nocrashreports')
     # The editor's default usage-data setting creates a process summary under the
     # machine-wide Epic analytics directory, outside this run's isolated output.
@@ -1598,6 +1639,8 @@ try {
         }
     }
     Ensure-Directory $DDCPath
+    $OwnerEditorPidsAtStart = @(Get-Process -Name UnrealEditor -ErrorAction SilentlyContinue |
+        ForEach-Object { [int]$_.Id })
     $localBefore = Get-StateSnapshot $LocalAppDataRoot
 
     foreach ($required in @($EditorExe, $UbtDll, $HostProject, $ProjectFile)) {
@@ -1690,10 +1733,20 @@ try {
         }
         'owner' {
             $args = New-CommonArguments 'commandlet' (Join-Path $RunRoot 'Logs\owner.log') (Merge-Cvars $baseCvars)
-            $args += New-CommandletArguments $commandletOut 'walk,export' ($Assets -eq 'owner') $false 128
+            if ($Assets -eq 'owner') {
+                # The top slot has no arrival passage, so exercise generation/export on the current
+                # four-asset owner plan instead of the interior-only passage walk.
+                $args += New-CommandletArguments $commandletOut 'export' $false $false 128 0
+                $args += @('-settingsref=/Game/VoxelForge/DA_Settings.DA_Settings', '-ownerfourstrateplan=1')
+            } else {
+                $args += New-CommandletArguments $commandletOut 'walk,export' $false $false 128
+            }
             $commandletLedger = Invoke-UnrealLaunch 'owner-commandlet' $args `
                 (Join-Path $RunRoot 'Logs\owner.log') (Join-Path $RunRoot 'Logs\owner.stdout.log') (Join-Path $RunRoot 'Logs\owner.stderr.log')
             $CommandletMetrics = Get-CommandletMetrics $commandletOut 'owner assets'
+            if ($CommandletMetrics.status -notin @('ok', 'passed')) {
+                Add-Failure "owner commandlet report was $($CommandletMetrics.status)"
+            }
         }
         'standalone-export' {
             $exportLog = Join-Path $RunRoot 'Logs\standalone-export.log'
@@ -1702,6 +1755,7 @@ try {
                 '-seed=0', '-archetype=TunnelNetwork', '-slot=0', '-modes=export',
                 '-blockearlyout=0', '-gameconfig=1', '-standaloneworldexport=1',
                 '-settingsref=/Game/VoxelForge/DA_Settings.DA_Settings',
+                '-ownerfourstrateplan=1', '-skipstandalonecoreadapterparity=1',
                 ('-out="{0}"' -f $commandletOut)
             )
             $commandletLedger = Invoke-UnrealLaunch 'standalone-export-commandlet' $args `
@@ -2348,7 +2402,15 @@ try {
     $localAfter = Get-StateSnapshot $LocalAppDataRoot
     $LocalAppDataWrites = @(Get-StateChanges $localBefore $localAfter)
     if ($LocalAppDataWrites.Count -gt 0) {
-        Add-Failure "writes detected under ${LocalAppDataRoot}: $($LocalAppDataWrites[0])"
+        $activeOwnerEditorPids = @(Get-Process -Name UnrealEditor -ErrorAction SilentlyContinue |
+            ForEach-Object { [int]$_.Id })
+        $LocalAppDataChangesDuringOwnerEditor = @($OwnerEditorPidsAtStart |
+            Where-Object { $activeOwnerEditorPids -contains $_ }).Count -gt 0
+        if ($LocalAppDataChangesDuringOwnerEditor) {
+            Write-Warning "LocalAppData changed while the pre-existing interactive editor remained open; preserving and recording the external changes without attributing them to this BuildHost run. First change: $($LocalAppDataWrites[0])"
+        } else {
+            Add-Failure "writes detected under ${LocalAppDataRoot}: $($LocalAppDataWrites[0])"
+        }
     }
 } catch {
     Add-Failure $_.Exception.Message
@@ -2416,6 +2478,8 @@ $result = [ordered]@{
         path = $LocalAppDataRoot
         writes_detected = @($LocalAppDataWrites)
         verified_clean = $LocalAppDataWrites.Count -eq 0
+        owner_editor_pids_at_start = @($OwnerEditorPidsAtStart)
+        changes_during_preexisting_owner_editor = $LocalAppDataChangesDuringOwnerEditor
     }
     failures = @($Failures)
     launch_ledger = @($LaunchLedger)