agents/windows/README.md

@@ -197,6 +197,20 @@ and other runtime data. Existing Scheduled Task definitions are authoritative
 and are not rewritten. Missing tasks are created for a fresh or incomplete
 installation without hard-coded user names.
 
+The per-user `MinerOpsAgentTray` task is optional UI and is not credential or
+core Agent authority. During an explicit filesystem trust reset, runtime
+publication may run noninteractively as `NT AUTHORITY\SYSTEM`, where no safe
+interactive user principal can be inferred. The installer still publishes
+`MinerOpsAgentTray.ps1`, but deliberately defers creation of a missing tray task
+until a later interactive maintenance install. It never creates the tray task
+as SYSTEM or invents a username. An existing tray task remains authoritative
+and is preserved unchanged rather than silently repaired under SYSTEM; inspect
+and remediate a suspected malformed definition separately. The core
+`MinerOpsAgent` task remains mandatory and strictly verified by credential
+recovery. `MinerOpsApi3Enrichment` and `MinerOpsPoolPoller` are non-interactive
+background tasks with explicit SYSTEM principals, so missing instances continue
+to be created during trust-reset publication.
+
 If MinerOpsAgent was running before an upgrade, the installer stops only that
 Scheduled Task, waits for it to stop, replaces the managed files, and starts it
 again. A previously stopped Agent remains stopped. Before replacing runtime

agents/windows/install.ps1

@@ -953,6 +953,19 @@ function Get-MinerOpsScheduledTask {
     return $tasks[0]
 }
 
+function Test-MinerOpsInstallerShouldCreateMissingTask {
+    param(
+        [Parameter(Mandatory)]$Definition,
+        [Parameter(Mandatory)][bool]$TrustResetMode
+    )
+
+    if (-not $TrustResetMode) { return $true }
+    if ($null -eq $Definition.CreateWhenMissingDuringTrustReset) {
+        throw "Scheduled Task trust-reset creation policy is missing."
+    }
+    return [bool]$Definition.CreateWhenMissingDuringTrustReset
+}
+
 function Stop-MinerOpsScheduledTaskForUpgrade {
     param(
         [Parameter(Mandatory)][string]$Name,
@@ -1101,22 +1114,26 @@ try {
             Name = "MinerOpsAgent"; Script = "MinerOpsAgentService.ps1"
             Trigger = $startup; Principal = $system; Settings = $agentSettings
             ExtraArguments = ""
+            CreateWhenMissingDuringTrustReset = $true
         },
         @{
             Name = "MinerOpsAgentTray"; Script = "MinerOpsAgentTray.ps1"
             Trigger = (New-ScheduledTaskTrigger -AtLogOn); Principal = $null
             Settings = $commonSettings; ExtraArguments = "-WindowStyle Hidden"
+            CreateWhenMissingDuringTrustReset = $false
         },
         @{
             Name = "MinerOpsApi3Enrichment"
             Script = "MinerOpsApi3EnrichmentPoller.ps1"
             Trigger = $fiveMinutes; Principal = $system; Settings = $commonSettings
             ExtraArguments = "-Limit 0 -TimeoutMs 8000"
+            CreateWhenMissingDuringTrustReset = $true
         },
         @{
             Name = "MinerOpsPoolPoller"; Script = "MinerOpsPoolPollerTask.ps1"
             Trigger = $fiveMinutes; Principal = $system; Settings = $commonSettings
             ExtraArguments = ""
+            CreateWhenMissingDuringTrustReset = $true
         }
     )
     foreach ($definition in $definitions) {
@@ -1129,6 +1146,16 @@ try {
             continue
         }
 
+        if (-not (Test-MinerOpsInstallerShouldCreateMissingTask `
+            -Definition $definition -TrustResetMode $trustResetMode)) {
+            # Trust-reset publication can run noninteractively as SYSTEM. A
+            # missing per-user tray has no safe interactive principal in that
+            # context. Its runtime file is already published; task creation is
+            # intentionally deferred to a later interactive maintenance run.
+            Write-Host "Deferring missing per-user Scheduled Task $($definition.Name) until an interactive install."
+            continue
+        }
+
         $arguments = '-NoProfile -ExecutionPolicy Bypass -File "{0}"' -f `
             (Join-Path $Target $definition.Script)
         if ($definition.ExtraArguments) {

agents/windows/tests/Test-MinerOpsInstaller.ps1

@@ -37,6 +37,10 @@ Assert-SourceContains '\$existingTask\s*=\s*Get-MinerOpsScheduledTask' `
     "Existing task preservation guard is missing."
 Assert-SourceContains 'Preserving existing Scheduled Task' `
     "Existing task preservation is not explicit."
+Assert-SourceContains 'Test-MinerOpsInstallerShouldCreateMissingTask' `
+    "Missing-task trust-reset policy helper is absent."
+Assert-SourceContains 'Deferring missing per-user Scheduled Task' `
+    "Missing per-user task deferral is not explicit."
 Assert-SourceContains 'ExtraArguments\s*=\s*"-Limit 0 -TimeoutMs 8000"' `
     "Fresh enrichment task arguments are missing."
 Assert-SourceContains 'Stop-MinerOpsScheduledTaskForUpgrade' `
@@ -52,6 +56,98 @@ Assert-SourceContains 'could not restart restored MinerOpsAgent' `
 Assert-SourceContains 'Assert-MinerOpsInstallerTrustedAncestors' `
     "Installer does not validate ancestor namespace protection."
 
+$taskDefinitionsStart = $source.IndexOf('$definitions = @(')
+$taskLoopStart = $source.IndexOf(
+    'foreach ($definition in $definitions)', $taskDefinitionsStart
+)
+if ($taskDefinitionsStart -lt 0 -or $taskLoopStart -le $taskDefinitionsStart) {
+    throw "Scheduled Task definitions or reconciliation loop were not found."
+}
+$taskDefinitions = $source.Substring(
+    $taskDefinitionsStart, $taskLoopStart - $taskDefinitionsStart
+)
+foreach ($policy in @(
+    @{ Name = "MinerOpsAgent"; Expected = '\$true' },
+    @{ Name = "MinerOpsAgentTray"; Expected = '\$false' },
+    @{ Name = "MinerOpsApi3Enrichment"; Expected = '\$true' },
+    @{ Name = "MinerOpsPoolPoller"; Expected = '\$true' }
+)) {
+    $definition = [regex]::Match(
+        $taskDefinitions,
+        ('(?s)@\{{.*?Name\s*=\s*"{0}".*?\}}' -f
+            [regex]::Escape($policy.Name))
+    ).Value
+    if ([string]::IsNullOrWhiteSpace($definition) -or
+        $definition -notmatch (
+            'CreateWhenMissingDuringTrustReset\s*=\s*{0}' -f
+                $policy.Expected
+        )) {
+        throw "Scheduled Task $($policy.Name) has the wrong trust-reset creation policy."
+    }
+}
+
+$taskLoopEnd = $source.IndexOf(
+    'if ($mainTaskWasRunning', $taskLoopStart
+)
+if ($taskLoopEnd -le $taskLoopStart) {
+    throw "Scheduled Task reconciliation loop end was not found."
+}
+$taskLoop = $source.Substring($taskLoopStart, $taskLoopEnd - $taskLoopStart)
+$preserveIndex = $taskLoop.IndexOf('$null -ne $existingTask')
+$deferIndex = $taskLoop.IndexOf(
+    'Test-MinerOpsInstallerShouldCreateMissingTask'
+)
+$actionIndex = $taskLoop.IndexOf('New-ScheduledTaskAction')
+if (
+    $preserveIndex -lt 0 -or
+    $deferIndex -le $preserveIndex -or
+    $actionIndex -le $deferIndex
+) {
+    throw "Existing-task preservation and missing-task deferral are ordered unsafely."
+}
+if ($taskLoop -match '80070534|No mapping between account names') {
+    throw "Missing per-user task handling must be policy-based, not HRESULT-based."
+}
+
+$taskPolicyFunction = [regex]::Match(
+    $source,
+    '(?s)function Test-MinerOpsInstallerShouldCreateMissingTask \{.*?\n\}'
+).Value
+if ([string]::IsNullOrWhiteSpace($taskPolicyFunction)) {
+    throw "Missing-task trust-reset policy function source was not found."
+}
+Invoke-Expression $taskPolicyFunction
+$trayPolicy = [pscustomobject]@{
+    CreateWhenMissingDuringTrustReset = $false
+}
+$systemTaskPolicy = [pscustomobject]@{
+    CreateWhenMissingDuringTrustReset = $true
+}
+if (Test-MinerOpsInstallerShouldCreateMissingTask `
+    -Definition $trayPolicy -TrustResetMode $true) {
+    throw "Trust reset would create a missing per-user tray task."
+}
+if (-not (Test-MinerOpsInstallerShouldCreateMissingTask `
+    -Definition $trayPolicy -TrustResetMode $false)) {
+    throw "Normal interactive installation would not repair a missing tray task."
+}
+if (-not (Test-MinerOpsInstallerShouldCreateMissingTask `
+    -Definition $systemTaskPolicy -TrustResetMode $true)) {
+    throw "Trust reset would skip a missing explicit-SYSTEM task."
+}
+$missingPolicyRejected = $false
+try {
+    [void](Test-MinerOpsInstallerShouldCreateMissingTask `
+        -Definition ([pscustomobject]@{}) -TrustResetMode $true)
+}
+catch {
+    $missingPolicyRejected = $_.Exception.Message -match
+        'trust-reset creation policy is missing'
+}
+if (-not $missingPolicyRejected) {
+    throw "Trust reset accepted a task definition without explicit policy."
+}
+
 foreach ($functionName in @(
     "Assert-MinerOpsInstallerNoReparsePath",
     "Assert-MinerOpsInstallerTrustedAncestors"