diff --git a/agent99-control-plane.ps1 b/agent99-control-plane.ps1
index 14d4b929b..a28b24ff4 100644
--- a/agent99-control-plane.ps1
+++ b/agent99-control-plane.ps1
@@ -1557,8 +1557,10 @@ function Invoke-LoadShedding {
     }
 
     $cooldownMinutes = if ($action.cooldownMinutes) { [int]$action.cooldownMinutes } else { 30 }
+    $failureBackoffMinutes = if ($action.PSObject.Properties["failureBackoffMinutes"]) { [int]$action.failureBackoffMinutes } else { 10 }
     $safeName = ($action.name -replace "[^A-Za-z0-9_.-]", "_")
     $markerPath = Join-Path $EvidenceDir "loadshedding-$safeName.marker"
+    $failureMarkerPath = Join-Path $EvidenceDir "loadshedding-$safeName.failure.marker"
     if (Test-Path $markerPath) {
       $ageMinutes = ((Get-Date) - (Get-Item $markerPath).LastWriteTime).TotalMinutes
       if ($ageMinutes -lt $cooldownMinutes) {
@@ -1566,6 +1568,13 @@ function Invoke-LoadShedding {
         continue
       }
     }
+    if (Test-Path $failureMarkerPath) {
+      $failureAgeMinutes = ((Get-Date) - (Get-Item $failureMarkerPath).LastWriteTime).TotalMinutes
+      if ($failureAgeMinutes -lt $failureBackoffMinutes) {
+        $results += [pscustomobject]@{ name = $action.name; host = $action.host; skipped = $true; reason = "failure_backoff"; ageMinutes = [math]::Round($failureAgeMinutes, 1) }
+        continue
+      }
+    }
 
     Record-AgentEvent "load_shed_attempt" $hostSeverity "host=$($action.host) action=$($action.name) command=$($action.command)" $action -NoAlert
     $timeoutSeconds = if ($action.PSObject.Properties["timeoutSeconds"]) { [int]$action.timeoutSeconds } else { 60 }
@@ -1597,14 +1606,21 @@ function Invoke-LoadShedding {
       }
     }
 
-    $effectiveOk = [bool]($run.ok -or $postVerifyOk)
-    Set-Content -Path $markerPath -Value (Get-Date -Format o) -Encoding UTF8
+    $postVerifyRequired = [bool]($action.PSObject.Properties["postVerifyCommand"] -and $action.postVerifyCommand)
+    $effectiveOk = if ($postVerifyRequired) { [bool]$postVerifyOk } else { [bool]$run.ok }
+    if ($effectiveOk) {
+      Set-Content -Path $markerPath -Value (Get-Date -Format o) -Encoding UTF8
+      Remove-Item -Force $failureMarkerPath -ErrorAction SilentlyContinue | Out-Null
+    } else {
+      Set-Content -Path $failureMarkerPath -Value (Get-Date -Format o) -Encoding UTF8
+    }
     $result = [pscustomobject]@{
       name = $action.name
       host = $action.host
       skipped = $false
       ok = $effectiveOk
       executionOk = [bool]$run.ok
+      postVerifyRequired = $postVerifyRequired
       postVerifyOk = [bool]$postVerifyOk
       postVerify = $postVerify
       route = $run.route
diff --git a/agent99-deploy.ps1 b/agent99-deploy.ps1
index 4296d3734..04259ec69 100644
--- a/agent99-deploy.ps1
+++ b/agent99-deploy.ps1
@@ -17,6 +17,7 @@ $StageDir = Join-Path $DeployRoot "staging-$stamp"
 $BackupDir = Join-Path $DeployRoot "backup-$stamp"
 $ManifestPath = Join-Path $StateDir "runtime-manifest.json"
 $EvidencePath = Join-Path $EvidenceDir "agent99-deploy-$stamp.json"
+$script:ConfigMigrations = @()
 
 $runtimeFiles = @(
   "agent99-bootstrap.ps1",
@@ -54,6 +55,15 @@ function Add-DefaultProperty {
   }
 }
 
+function Set-AgentProperty {
+  param([object]$Object, [string]$Name, [object]$Value)
+  if ($Object.PSObject.Properties[$Name]) {
+    $Object.PSObject.Properties[$Name].Value = $Value
+  } else {
+    $Object | Add-Member -MemberType NoteProperty -Name $Name -Value $Value
+  }
+}
+
 function Write-DeployEvidence {
   param([bool]$Ok, [string]$Status, [string]$ErrorText, [object[]]$Files, [object]$TaskResult)
   New-Item -ItemType Directory -Force -Path $EvidenceDir | Out-Null
@@ -71,6 +81,7 @@ function Write-DeployEvidence {
     validateOnly = [bool]$ValidateOnly
     registerTasks = [bool]$RegisterTasks
     error = $ErrorText
+    configMigrations = @($script:ConfigMigrations)
     files = $Files
     taskRegistration = $TaskResult
   } | ConvertTo-Json -Depth 10 | Set-Content -Path $EvidencePath -Encoding UTF8
@@ -177,6 +188,25 @@ try {
   Add-DefaultProperty $config "performance" ([pscustomobject]@{})
   Add-DefaultProperty $config.performance "processCpuHostPercentWarning" 25
   Add-DefaultProperty $config.performance "processCpuHostPercentCritical" 50
+
+  $policyConfig = Get-Content (Join-Path $StageDir "agent99.config.99.example.json") -Raw | ConvertFrom-Json
+  foreach ($sourceAction in @($policyConfig.performance.loadShedding.actions | Where-Object { $_.PSObject.Properties["policyVersion"] })) {
+    $liveAction = $config.performance.loadShedding.actions | Where-Object { $_.name -eq $sourceAction.name } | Select-Object -First 1
+    if (-not $liveAction) { continue }
+    $sourceVersion = [int]$sourceAction.policyVersion
+    $liveVersion = if ($liveAction.PSObject.Properties["policyVersion"]) { [int]$liveAction.policyVersion } else { 0 }
+    if ($sourceVersion -le $liveVersion) { continue }
+    foreach ($propertyName in @("policyVersion", "host", "command", "timeoutSeconds", "postVerifyCommand", "postVerifyMaxDiskUsedPercent", "postVerifyOkRegex", "rollback", "cooldownMinutes", "failureBackoffMinutes", "minSeverity", "reasonMatches", "enabled")) {
+      if ($sourceAction.PSObject.Properties[$propertyName]) {
+        Set-AgentProperty $liveAction $propertyName $sourceAction.PSObject.Properties[$propertyName].Value
+      }
+    }
+    $script:ConfigMigrations += [pscustomobject]@{
+      name = [string]$sourceAction.name
+      fromPolicyVersion = $liveVersion
+      toPolicyVersion = $sourceVersion
+    }
+  }
   $config | ConvertTo-Json -Depth 20 | Set-Content -Path $ConfigPath -Encoding UTF8
 
   $manifestRows = @()
diff --git a/agent99.config.99.example.json b/agent99.config.99.example.json
index 317d02866..5c29501bb 100644
--- a/agent99.config.99.example.json
+++ b/agent99.config.99.example.json
@@ -156,13 +156,15 @@
       "actions": [
         {
           "name": "prune-188-docker-build-cache-disk-pressure",
+          "policyVersion": 2,
           "host": "192.168.0.188",
-          "command": "echo BEFORE_DF=$(df -P / | awk 'NR==2{print $5}'); docker system df; docker builder prune -af --filter until=24h; echo AFTER_DF=$(df -P / | awk 'NR==2{print $5}'); docker system df",
+          "command": "echo BEFORE_DF=$(df -P / | awk 'NR==2{print $5}'); docker system df; docker builder prune -af; echo AFTER_DF=$(df -P / | awk 'NR==2{print $5}'); docker system df",
           "timeoutSeconds": 240,
           "postVerifyCommand": "df -P / | awk 'NR==2{gsub(\"%\",\"\",$5); print \"__DISK_USED__=\"$5}'",
           "postVerifyMaxDiskUsedPercent": 89,
           "rollback": "echo rollback_not_applicable_for_build_cache_prune",
           "cooldownMinutes": 120,
+          "failureBackoffMinutes": 10,
           "minSeverity": "warning",
           "reasonMatches": [
             "disk_used_warning",
diff --git a/apps/api/tests/test_agent99_transport_recovery_deploy_contract.py b/apps/api/tests/test_agent99_transport_recovery_deploy_contract.py
index d01fc3bba..3a7d8b8e6 100644
--- a/apps/api/tests/test_agent99_transport_recovery_deploy_contract.py
+++ b/apps/api/tests/test_agent99_transport_recovery_deploy_contract.py
@@ -68,3 +68,33 @@ def test_agent99_deployer_verifies_promoted_runtime_and_writes_revision() -> Non
     ):
         assert f'"{name}"' in deploy
         assert f'"{name}"' in bootstrap
+
+
+def test_load_shedding_requires_configured_post_verifier() -> None:
+    source = CONTROL.read_text(encoding="utf-8")
+    function = source[source.index("function Invoke-LoadShedding") :]
+    function = function[: function.index("function Get-AgentBooleanSetting")]
+
+    assert 'reason = "failure_backoff"' in function
+    assert 'postVerifyRequired = [bool]' in function
+    assert "$effectiveOk = if ($postVerifyRequired)" in function
+    assert "Set-Content -Path $failureMarkerPath" in function
+    assert "$run.ok -or $postVerifyOk" not in function
+
+
+def test_disk_pressure_policy_is_versioned_and_migrated_by_deployer() -> None:
+    config = json.loads((ROOT / "agent99.config.99.example.json").read_text())
+    deploy = DEPLOY.read_text(encoding="utf-8")
+    action = next(
+        item
+        for item in config["performance"]["loadShedding"]["actions"]
+        if item["name"] == "prune-188-docker-build-cache-disk-pressure"
+    )
+
+    assert action["policyVersion"] == 2
+    assert "docker builder prune -af;" in action["command"]
+    assert "until=24h" not in action["command"]
+    assert action["failureBackoffMinutes"] == 10
+    assert "$script:ConfigMigrations" in deploy
+    assert '"policyVersion"' in deploy
+    assert "toPolicyVersion = $sourceVersion" in deploy