Agent: protected DACL on the agent data directory (D-355)

%ProgramData%\AutopilotMonitor inherited ProgramData's "Users may create files and
folders" entry, so a standard user could add files to the folder the SYSTEM agent and its
boot task start from. The agent outlives the device phase of OOBE (user phase, desktop,
reboots until the enrollment ends), and the payload catalog is checked at install time
only.

- AgentDirectoryAcl.EnsureProtected: protected DACL, SYSTEM and Administrators full
  control, Users read and execute, inherited by every subfolder; idempotent, never blocks
  the agent.
- Install mode applies it after the agent directories exist; every runtime start
  re-checks it, which also reaches agents that arrived by self-update.
- Tests: protected shape, apply once then leave alone, existing subfolders take it over,
  a widened or unprotected DACL is not taken as protected, a missing folder is not created.

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

.claude/CLAUDE.md

@@ -38,6 +38,8 @@
 - Simplicity first: minimal, targeted changes. No temporary fixes — find the root cause.
 - Where architecture is flawed, state is duplicated, or patterns are inconsistent, propose and implement the structural fix. Ask what a perfectionist reviewer would reject, and fix that too.
 - On non-trivial changes, ask whether there is a more elegant way before presenting. Skip it for simple fixes — don't over-engineer.
+- Reuse before you write: search for an existing helper by what it does (its key call, literal or regex), not by a guessed name. Web helpers live in `lib/` (route-only ones in a `lib/` beside the route), backend helpers in `Functions/Helpers/`.
+- Dead and copied code is gated: the .NET build fails on unused private members and parameters (`.editorconfig`), `npm run knip` covers web and MCP, and `npm run dup` in `tools/quality` fails on new clones. CI only reports, so run them before calling a change done.
 - English for code comments and everything that carries knowledge.
 
 Private half of these instructions (process, working files, technical docs, operations): @../internal/CLAUDE.md

.editorconfig

@@ -0,0 +1,11 @@
+# Analyzer severities for the .NET build. Directory.Build.props runs the IDE rules in
+# `dotnet build` (EnforceCodeStyleInBuild), and the warning freeze makes every warning an error.
+root = true
+
+[*.cs]
+# Unused private members, private members that are written but never read, and unused parameters
+# of non-public methods. An injected dependency nobody reads is a feature that silently never runs.
+dotnet_diagnostic.IDE0051.severity = warning
+dotnet_diagnostic.IDE0052.severity = warning
+dotnet_diagnostic.IDE0060.severity = warning
+dotnet_code_quality_unused_parameters = non_public

.github/dependabot.yml

@@ -65,7 +65,7 @@ updates:
       - dependency-name: '*'
         update-types: ['version-update:semver-major']
 
-  # Validator tooling for rules/ (ajv-cli); combine-rules.yml installs it from this
+  # Validator tooling for rules/ (ajv for validate.js); combine-rules.yml installs it from this
   # lockfile with contents:write in hand, so the pins must not go stale.
   - package-ecosystem: npm
     directory: /rules/scripts
@@ -81,6 +81,23 @@ updates:
         applies-to: security-updates
         patterns: ['*']
 
+  # Duplicate-check tooling (jscpd for tools/quality/check-duplicates.mjs), installed by the
+  # CI duplicates job from this lockfile. A jscpd update can change the clone fingerprints:
+  # if its PR fails the job, regenerate the baseline (npm run dup:baseline) in that PR.
+  - package-ecosystem: npm
+    directory: /tools/quality
+    schedule:
+      interval: weekly
+    cooldown:
+      default-days: 7
+    open-pull-requests-limit: 5
+    groups:
+      quality-tooling:
+        patterns: ['*']
+      quality-tooling-security:
+        applies-to: security-updates
+        patterns: ['*']
+
   # Every action is referenced by commit SHA with the version in a trailing comment;
   # action-pins.yml fails any workflow change that reintroduces a mutable tag. Dependabot
   # is what keeps those pins current: it rewrites the SHA and the comment together, so the

.github/scripts/Assert-HostsFromRegistry.ps1

@@ -0,0 +1,84 @@
+<#
+.SYNOPSIS
+    Fails when a workflow or a CI helper spells out a host instead of reading Get-Endpoints.ps1.
+
+.DESCRIPTION
+    The CI counterpart of the URL-registry guard tests (HardcodedUrlGuardTests,
+    hardcodedUrls.guard.test.ts, hardcoded-urls.guard.test.ts). Enforced: every host the registry
+    defines -- derived from it, so the list cannot fall behind -- plus any Azure storage, App Service
+    or autopilotmonitor.com host, so a new or misspelled account is caught as well.
+
+    Scans .github/workflows/*.yml and .github/scripts/*.ps1 except the registry itself. Comment lines
+    and PowerShell block comments do not count: comments may cite URLs.
+
+.PARAMETER Root
+    Repository root to scan. Defaults to the parent of .github/scripts.
+#>
+[CmdletBinding()]
+param(
+    [string]$Root
+)
+
+$ErrorActionPreference = 'Stop'
+
+if (-not $Root) {
+    $Root = (Resolve-Path (Join-Path $PSScriptRoot '../..')).Path
+}
+
+$endpoints = & (Join-Path $PSScriptRoot 'Get-Endpoints.ps1')
+$registryHosts = $endpoints.Values | ForEach-Object { ([uri]$_).Host } | Sort-Object -Unique
+$patterns = @($registryHosts | ForEach-Object { [regex]::Escape($_) }) + @(
+    '[a-z0-9-]+\.(blob|table|queue|file)\.core\.windows\.net'
+    '[a-z0-9-]+\.azurewebsites\.net'
+    '([a-z0-9-]+\.)*autopilotmonitor\.com'
+)
+$hostPattern = [regex]::new('(' + ($patterns -join '|') + ')', 'IgnoreCase')
+
+$files = @(
+    Get-ChildItem -Path (Join-Path $Root '.github/workflows') -File -Filter '*.yml'
+    Get-ChildItem -Path (Join-Path $Root '.github/workflows') -File -Filter '*.yaml'
+    Get-ChildItem -Path (Join-Path $Root '.github/scripts') -File -Filter '*.ps1' |
+        Where-Object Name -ne 'Get-Endpoints.ps1'
+)
+
+$findings = 0
+foreach ($file in $files) {
+    $relative = [System.IO.Path]::GetRelativePath($Root, $file.FullName) -replace '\\', '/'
+    $isPowerShell = $file.Extension -eq '.ps1'
+    $inBlock = $false
+    $lineNumber = 0
+    foreach ($line in [System.IO.File]::ReadAllLines($file.FullName)) {
+        $lineNumber++
+        $code = $line
+        if ($isPowerShell) {
+            if ($inBlock) {
+                $end = $code.IndexOf('#>')
+                if ($end -lt 0) { continue }
+                $code = $code.Substring($end + 2)
+                $inBlock = $false
+            }
+            $start = $code.IndexOf('<#')
+            if ($start -ge 0) {
+                $end = $code.IndexOf('#>', $start + 2)
+                if ($end -lt 0) {
+                    $code = $code.Substring(0, $start)
+                    $inBlock = $true
+                } else {
+                    $code = $code.Remove($start, $end + 2 - $start)
+                }
+            }
+        }
+        if ($code.TrimStart().StartsWith('#')) { continue }
+
+        $match = $hostPattern.Match($code)
+        if ($match.Success) {
+            Write-Host "::error file=$relative,line=$lineNumber::$($match.Value) is spelled out here -- take it from .github/scripts/Get-Endpoints.ps1."
+            $findings++
+        }
+    }
+}
+
+if ($findings -gt 0) {
+    throw "$findings host literal(s) outside the endpoint registry."
+}
+Write-Host "No host literal outside .github/scripts/Get-Endpoints.ps1 ($($files.Count) files scanned)."

.github/scripts/Get-Endpoints.ps1

@@ -0,0 +1,71 @@
+<#
+.SYNOPSIS
+    The one place the workflows and the release scripts take their hosts from.
+
+.DESCRIPTION
+    CI's member of the URL registry (Shared Constants.cs, web lib/config.ts, MCP src/config.ts):
+    every own host the workflows, the .github/scripts helpers and the local release build talk to,
+    plus the Authenticode timestamp server, is defined here once. Assert-HostsFromRegistry.ps1
+    (Workflow gates) fails on any of these hosts spelled out elsewhere under .github/.
+
+    The storage URLs derive from the account name, so blob and table can never point at two
+    different accounts.
+
+    A file in the repository rather than a GitHub variable: the local release build reads it too,
+    and bearer tokens are sent to these URLs -- where a token goes stays a reviewed line in git.
+
+.PARAMETER ExportToGitHubEnv
+    Write every entry to $GITHUB_ENV instead of returning it, so the following steps of the job
+    read them as environment variables ($env:AGENT_CONTAINER_URL, ${{ env.AGENT_CONTAINER_URL }}).
+
+.OUTPUTS
+    [ordered] hashtable, keyed by the names the environment variables carry.
+
+.EXAMPLE
+    $endpoints = & "$PSScriptRoot/Get-Endpoints.ps1"
+    Invoke-WebRequest -Uri "$($endpoints.AGENT_CONTAINER_URL)/version.json"
+#>
+[CmdletBinding()]
+param(
+    [switch]$ExportToGitHubEnv
+)
+
+$ErrorActionPreference = 'Stop'
+
+$storageAccount = 'autopilotmonitoreu'
+# Pre-migration account in another tenant; only the fail-soft legacy mirror still writes there.
+$legacyStorageAccount = 'autopilotmonitor'
+
+$blob  = "https://$storageAccount.blob.core.windows.net"
+$table = "https://$storageAccount.table.core.windows.net"
+
+$endpoints = [ordered]@{
+    STORAGE_BLOB_URL           = $blob
+    STORAGE_TABLE_URL          = $table
+    AGENT_CONTAINER_URL        = "$blob/agent"
+    VERSIONS_CONTAINER_URL     = "$blob/versions"
+    STATS_CONTAINER_URL        = "$blob/stats"
+    # Platform settings row; CI writes only its agent and bootstrap version columns.
+    ADMIN_CONFIG_URL           = "$table/AdminConfiguration(PartitionKey='GlobalConfig',RowKey='config')"
+    LEGACY_AGENT_CONTAINER_URL = "https://$legacyStorageAccount.blob.core.windows.net/agent"
+    # Front Door in front of the agent container: what customer scripts download from.
+    DOWNLOAD_ALIAS_URL         = 'https://download.autopilotmonitor.com/agent'
+    API_BASE_URL               = 'https://autopilotmonitor-api-eu.azurewebsites.net'
+    MCP_BASE_URL               = 'https://mcp.autopilotmonitor.com'
+    PORTAL_BASE_URL            = 'https://portal.autopilotmonitor.com'
+    WWW_BASE_URL               = 'https://www.autopilotmonitor.com'
+    DOCS_BASE_URL              = 'https://docs.autopilotmonitor.com'
+    CODE_SIGN_TIMESTAMP_URL    = 'http://timestamp.acs.microsoft.com'
+}
+
+if ($ExportToGitHubEnv) {
+    if ([string]::IsNullOrWhiteSpace($env:GITHUB_ENV)) {
+        throw '-ExportToGitHubEnv only works inside a GitHub Actions step.'
+    }
+    $endpoints.GetEnumerator() | ForEach-Object { "$($_.Key)=$($_.Value)" } |
+        Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+    $endpoints.GetEnumerator() | ForEach-Object { Write-Host "$($_.Key) = $($_.Value)" }
+    return
+}
+
+return $endpoints

.github/scripts/Publish-BootstrapScripts.ps1

@@ -81,7 +81,6 @@ param(
     [string]$SigningToken,
     [string]$KeyVaultUrl,
     [string]$CertificateName,
-    [string]$TimestampUrl = 'http://timestamp.acs.microsoft.com',
     [string]$ExpectedPublisher,
     [string]$SignedOutputDir,
     [switch]$DryRun
@@ -93,10 +92,13 @@ if (-not $RepoRoot) {
     $RepoRoot = (Resolve-Path (Join-Path $PSScriptRoot '../..')).Path
 }
 
-$ContainerUrl       = 'https://autopilotmonitoreu.blob.core.windows.net/agent'
-$LegacyContainerUrl = 'https://autopilotmonitor.blob.core.windows.net/agent'
-$AliasUrl           = 'https://download.autopilotmonitor.com/agent'
-$TableUrl           = "https://autopilotmonitoreu.table.core.windows.net/AdminConfiguration(PartitionKey='GlobalConfig',RowKey='config')"
+# Every host, the timestamp server included, from the one endpoint registry.
+$Endpoints          = & (Join-Path $PSScriptRoot 'Get-Endpoints.ps1')
+$ContainerUrl       = $Endpoints.AGENT_CONTAINER_URL
+$LegacyContainerUrl = $Endpoints.LEGACY_AGENT_CONTAINER_URL
+$AliasUrl           = $Endpoints.DOWNLOAD_ALIAS_URL
+$TableUrl           = $Endpoints.ADMIN_CONFIG_URL
+$TimestampUrl       = $Endpoints.CODE_SIGN_TIMESTAMP_URL
 
 $BootstrapSource   = Join-Path $RepoRoot 'scripts/Bootstrap/Install-AutopilotMonitor.ps1'
 $BootstrapBlob     = 'Install-AutopilotMonitor.ps1'
@@ -210,7 +212,7 @@ function Set-PublishSetSignature {
         --timestamp-rfc3161 $TimestampUrl `
         --file-digest sha256 `
         --description 'Autopilot Monitor bootstrap' `
-        --description-url 'https://www.autopilotmonitor.com' `
+        --description-url $Endpoints.WWW_BASE_URL `
         $paths
 
     # Native tool: PowerShell does not throw on a non-zero exit, and an unnoticed signing
@@ -327,8 +329,10 @@ $loaderVersion = Get-BootstrapScriptVersion -Content $loaderContent -Origin $Loa
 Write-Host "Loader script version: $loaderVersion"
 
 # ------------------------------------------------------------------ 2. dev render
-$stableUrlLiteral = '$AgentDownloadUrl = "https://download.autopilotmonitor.com/agent/AutopilotMonitor-Agent.zip"'
-$devUrlLiteral    = '$AgentDownloadUrl = "https://download.autopilotmonitor.com/agent/AutopilotMonitor-Agent-dev.zip"'
+# The anchors are the customer scripts' own text, built from the alias in the registry. Should
+# the alias ever move, the scripts have to move with it -- until they do, the render stops here.
+$stableUrlLiteral = '$AgentDownloadUrl = "' + $AliasUrl + '/AutopilotMonitor-Agent.zip"'
+$devUrlLiteral    = '$AgentDownloadUrl = "' + $AliasUrl + '/AutopilotMonitor-Agent-dev.zip"'
 $stableManLiteral = '$VersionJsonName = "version.json"'
 $devManLiteral    = '$VersionJsonName = "version-dev.json"'
 
@@ -339,8 +343,8 @@ $devContent = $sourceContent.Replace($stableUrlLiteral, $devUrlLiteral).Replace(
 Write-Host "Rendered $DevBlob (dev agent URL + version-dev.json)"
 
 # The dev loader must fetch the dev bootstrap, or a dev device would run the stable chain.
-$stableLoaderLiteral = '$BootstrapUrl = "https://download.autopilotmonitor.com/agent/Install-AutopilotMonitor.ps1"'
-$devLoaderLiteral    = '$BootstrapUrl = "https://download.autopilotmonitor.com/agent/Install-AutopilotMonitor-Dev.ps1"'
+$stableLoaderLiteral = '$BootstrapUrl = "' + $AliasUrl + '/Install-AutopilotMonitor.ps1"'
+$devLoaderLiteral    = '$BootstrapUrl = "' + $AliasUrl + '/Install-AutopilotMonitor-Dev.ps1"'
 
 if ($loaderContent.IndexOf($stableLoaderLiteral) -lt 0) {
     throw "Loader dev-render: anchor literal missing in $LoaderSource"

.github/workflows/action-pins.yml

@@ -1,12 +1,15 @@
 name: Workflow gates
 
-# Two checks over the workflow files themselves:
+# Three checks over the workflow files and their helper scripts:
 #   * verify-pins -- every third-party action is referenced by a full commit SHA plus a
 #                    version comment (stricter than zizmor's unpinned-uses audit).
 #   * zizmor      -- static analysis of every workflow (permissions, credential
 #                    persistence, template injection, ...). Configuration and the
 #                    reasoned ignores live in zizmor.yml at the repository root; the
 #                    same run is expected locally before a workflow change is committed.
+#   * hosts       -- no workflow or .github/scripts helper spells out a host; every one
+#                    comes from .github/scripts/Get-Endpoints.ps1, CI's member of the URL
+#                    registry (the C#, web and MCP registries have guard tests of their own).
 #
 # Every third-party action must be referenced by a full commit SHA, never by a tag.
 # Tags are mutable: whoever controls an action repository can repoint v4 at new code,
@@ -26,15 +29,18 @@ name: Workflow gates
 #
 # The pins are not maintained by hand — .github/dependabot.yml opens a monthly grouped
 # PR that rewrites both the SHA and the trailing version comment. The comment is
-# therefore required too: it is what makes a pinned line reviewable.
+# therefore required too: it is what makes a pinned line reviewable. It names the exact
+# release tag (# v7.0.1), never the floating major (# v7): a major tag moves with every
+# upstream release, after which the comment no longer names the pinned commit and
+# zizmor's ref-version-mismatch flags every line that carries it.
 
 on:
   push:
     branches: [main]
-    paths: ['.github/workflows/**', '.github/dependabot.yml', 'zizmor.yml']
+    paths: ['.github/workflows/**', '.github/scripts/**', '.github/dependabot.yml', 'zizmor.yml']
   pull_request:
     branches: [main]
-    paths: ['.github/workflows/**', '.github/dependabot.yml', 'zizmor.yml']
+    paths: ['.github/workflows/**', '.github/scripts/**', '.github/dependabot.yml', 'zizmor.yml']
   workflow_dispatch:
 
 permissions:
@@ -45,7 +51,7 @@ jobs:
     name: Verify action pins
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
 
@@ -59,13 +65,15 @@ jobs:
             # nothing to pin.
             case "$ref" in ./*|\$/*) continue ;; esac
 
-            if [[ "$ref" =~ ^[^@]+@[0-9a-f]{40}[[:space:]]+#[[:space:]]*[^[:space:]] ]]; then
+            if [[ "$ref" =~ ^[^@]+@[0-9a-f]{40}[[:space:]]+#[[:space:]]*v?[0-9]+\.[0-9]+\.[0-9]+([[:space:]]|$) ]]; then
               printf 'ok  %s:%s  %s\n' "$file" "$line" "$ref"
               continue
             fi
 
             if [[ "$ref" =~ ^[^@]+@[0-9a-f]{40}[[:space:]]*$ ]]; then
-              echo "::error file=$file,line=$line::Pinned but the version comment is missing: '$ref'. Write 'owner/action@<sha> # vN' so the line stays reviewable."
+              echo "::error file=$file,line=$line::Pinned but the version comment is missing: '$ref'. Write 'owner/action@<sha> # vX.Y.Z' so the line stays reviewable."
+            elif [[ "$ref" =~ ^[^@]+@[0-9a-f]{40}[[:space:]]+# ]]; then
+              echo "::error file=$file,line=$line::The version comment must name the exact release tag the SHA resolves to ('# vX.Y.Z'), not a floating major: '$ref'. Find it with: gh api repos/<owner>/<action>/git/matching-refs/tags/vN"
             else
               echo "::error file=$file,line=$line::Action '$ref' is not pinned to a commit SHA. Tags are mutable -- resolve it with: gh api repos/<owner>/<action>/git/ref/tags/<tag>"
             fi
@@ -89,7 +97,7 @@ jobs:
       security-events: write   # SARIF upload: findings land in the Code scanning tab next to CodeQL
       actions: read
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
 
@@ -101,3 +109,17 @@ jobs:
         with:
           version: 1.30.1
           min-severity: low
+
+  hosts:
+    name: Hosts only from the endpoint registry
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      # The enforced host list is derived from the registry itself, plus every Azure storage,
+      # App Service and autopilotmonitor.com host, so it cannot fall behind a new entry.
+      - name: No host literal outside .github/scripts/Get-Endpoints.ps1
+        shell: pwsh
+        run: ./.github/scripts/Assert-HostsFromRegistry.ps1

.github/workflows/bootstrap-script-gates.yml

@@ -18,7 +18,7 @@ jobs:
     name: Bootstrap guard tests (PS 5.1)
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
 

.github/workflows/build-agent.yml

@@ -7,6 +7,14 @@ on:
         description: 'Build number override (leave empty to auto-increment from buildcounter.txt)'
         required: false
         type: string
+      channel:
+        description: 'release = versioned line (+ stable on cutover). dev = lab channel only (Agent-v2-dev.zip, version-v2-dev.json, Agent-dev.zip, version-dev.json); needs publish_as_stable=false and create_release=false'
+        required: true
+        type: choice
+        options:
+          - release
+          - dev
+        default: release
       upload_blob:
         description: 'Upload to versioned namespace (Agent-v2.zip + version-v2.json)'
         required: true
@@ -32,10 +40,11 @@ on:
         required: false
         type: string
 
+# Every job states its own permissions. This default is what the build job runs with: it
+# executes third-party code (MSBuild targets, analyzers, test frameworks) and must never hold
+# more than a read-only token.
 permissions:
-  contents: write
-  id-token: write      # keyless Sigstore signing (artifact attestation)
-  attestations: write  # store the provenance attestation
+  contents: read
 
 # Shared with publish-scripts.yml: both write version.json (this workflow the agent fields,
 # the script publisher bootstrapVersion under If-Match). Serialising them keeps a script push
@@ -48,7 +57,9 @@ env:
   LINE_MAJOR: 2
   AGENT_PROJECT: src/Agent/AutopilotMonitor.Agent.V2/AutopilotMonitor.Agent.V2.csproj
   DIALOG_PROJECT: src/Agent/AutopilotMonitor.SummaryDialog/AutopilotMonitor.SummaryDialog.csproj
-  TEST_PROJECT: src/Agent/AutopilotMonitor.DecisionCore.Tests/AutopilotMonitor.DecisionCore.Tests.csproj
+  DECISIONCORE_TEST_PROJECT: src/Agent/AutopilotMonitor.DecisionCore.Tests/AutopilotMonitor.DecisionCore.Tests.csproj
+  CORE_TEST_PROJECT: src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/AutopilotMonitor.Agent.V2.Core.Tests.csproj
+  DIALOG_TEST_PROJECT: src/Agent/AutopilotMonitor.SummaryDialog.Tests/AutopilotMonitor.SummaryDialog.Tests.csproj
   CSPROJ_PATH: src/Agent/AutopilotMonitor.Agent.V2/AutopilotMonitor.Agent.V2.csproj
   BOOTSTRAP_SOURCE: scripts/Bootstrap/Install-AutopilotMonitor.ps1
   AGENT_OUTPUT: src/Agent/AutopilotMonitor.Agent.V2/bin/Release/net48
@@ -57,25 +68,49 @@ env:
   VERSIONED_ZIP: AutopilotMonitor-Agent-v2.zip
   STABLE_ZIP: AutopilotMonitor-Agent.zip
   STABLE_MANIFEST: version.json
-  # Authenticode via Azure Key Vault; identity and vault come from repository variables.
+  # Lab channel (channel=dev): the names the dev renders of the bootstrap scripts read.
+  CHANNEL: ${{ inputs.channel }}
+  DEV_VERSIONED_ZIP: AutopilotMonitor-Agent-v2-dev.zip
+  DEV_MANIFEST: version-v2-dev.json
+  DEV_STABLE_ZIP: AutopilotMonitor-Agent-dev.zip
+  DEV_STABLE_MANIFEST: version-dev.json
+  # Signed catalog over every other file of the payload. Must equal
+  # Constants.AgentPayloadCatalogFileName; CodeSigningParityTests keeps them in step.
+  PAYLOAD_CATALOG: AutopilotMonitor.Agent.cat
+  # Authenticode via Azure Key Vault; identity and vault come from repository variables, the
+  # timestamp server (CODE_SIGN_TIMESTAMP_URL) from the endpoint registry like every host here.
   # CODE_SIGN_EXPECTED_SUBJECT is optional and pins the publisher in the verify step.
   CODE_SIGN_CLIENT_ID: ${{ vars.CODE_SIGN_CLIENT_ID }}
   CODE_SIGN_CERTIFICATE_NAME: ${{ vars.CODE_SIGN_CERTIFICATE_NAME }}
   CODE_SIGN_KEY_VAULT_URL: ${{ vars.CODE_SIGN_KEY_VAULT_URL }}
   CODE_SIGN_EXPECTED_SUBJECT: ${{ vars.CODE_SIGN_EXPECTED_SUBJECT }}
-  CODE_SIGN_TIMESTAMP_URL: http://timestamp.acs.microsoft.com
 
 jobs:
-  build:
-    runs-on: windows-latest
-    name: Build Agent
+  # Runs only this repository's scripts. The deploy identity trusts the `production`
+  # environment, which admits main only.
+  reserve:
+    name: Reserve build number
+    runs-on: ubuntu-latest
+    environment: production
+    permissions:
+      contents: read
+      id-token: write   # OIDC federated login for the counter write
+    outputs:
+      build_number: ${{ steps.version.outputs.build_number }}
+      version: ${{ steps.version.outputs.version }}
+      tag: ${{ steps.version.outputs.tag }}
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
 
+      # Every host in this workflow comes from the one endpoint registry.
+      - name: Load endpoints
+        shell: pwsh
+        run: ./.github/scripts/Get-Endpoints.ps1 -ExportToGitHubEnv
+
       # Every released build is signed; a missing variable stops the run before a build
       # number is burnt.
       - name: Check code-signing configuration
@@ -88,33 +123,22 @@ jobs:
           }
           Write-Host "Code-signing configuration present (certificate '$env:CODE_SIGN_CERTIFICATE_NAME')"
 
-      # Logs in FIRST and only to fetch the Key Vault token: azure/login sets the default az
-      # account, so the storage login below has to be the last one. Both federated credentials
-      # are bound to the ref, so this job must never be given an `environment:` -- that would
-      # change the OIDC subject claim and break both logins.
-      - name: Login to Azure (code-signing identity)
-        uses: azure/login@a641126d1b8aa4d1fa005f4f92df94a3a4c4c906 # v3.1.0
-        with:
-          client-id: ${{ env.CODE_SIGN_CLIENT_ID }}
-          tenant-id: ${{ secrets.AZURE_TENANT_ID }}
-          allow-no-subscriptions: true
-
-      - name: Acquire Key Vault token for signing
+      # The dev channel is a lab channel: it never touches stable, AdminConfiguration, the
+      # bootstrap scripts or a GitHub Release. Refused here, before a build number is burnt.
+      - name: Check channel inputs
         shell: pwsh
+        env:
+          PUBLISH_AS_STABLE: ${{ inputs.publish_as_stable }}
+          CREATE_RELEASE: ${{ inputs.create_release }}
         run: |
-          $ErrorActionPreference = 'Stop'
-          $token = az account get-access-token --scope https://vault.azure.net/.default --query accessToken --output tsv
-          if ($LASTEXITCODE -ne 0 -or [string]::IsNullOrWhiteSpace($token)) {
-            throw "Could not acquire a Key Vault token for the code-signing identity."
+          if ($env:CHANNEL -notin @('release', 'dev')) {
+            throw "Unknown channel '$($env:CHANNEL)'."
           }
-          Write-Host "::add-mask::$token"
-          "CODE_SIGN_AKV_ACCESS_TOKEN=$token" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+          if ($env:CHANNEL -eq 'dev' -and ($env:PUBLISH_AS_STABLE -eq 'true' -or $env:CREATE_RELEASE -eq 'true')) {
+            throw "channel=dev publishes the lab channel only: run it with publish_as_stable=false and create_release=false."
+          }
+          Write-Host "Channel: $env:CHANNEL"
 
-      # Every storage write below (counter blob, agent ZIP, manifests, AdminConfiguration)
-      # is authorized by this federated identity -- no SAS secret. One login covers the whole
-      # job: the federated credential is bound to the ref, and a release run takes ~2 minutes,
-      # well inside the token lifetime. Only the legacy mirror still needs a SAS: that account
-      # lives in the pre-migration tenant, where this principal has no identity.
       - name: Login to Azure (OIDC)
         uses: azure/login@a641126d1b8aa4d1fa005f4f92df94a3a4c4c906 # v3.1.0
         with:
@@ -122,18 +146,6 @@ jobs:
           tenant-id: ${{ secrets.AZURE_TENANT_ID }}
           subscription-id: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
 
-      # SDK 10 = single build toolchain (parity with local build.ps1 / global.json).
-      - name: Setup .NET
-        uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6
-        with:
-          dotnet-version: '10.0.x'
-
-      # Version pinned; roll-forward because the tool targets an older runtime than the SDK above.
-      - name: Install AzureSignTool
-        env:
-          DOTNET_ROLL_FORWARD: LatestMajor
-        run: dotnet tool install --no-cache --global AzureSignTool --version 7.0.1
-
       # Build numbers come from the shared counter blob -- one counter and one
       # implementation for CI and the local build (.github/scripts/Request-BuildNumber.ps1).
       # Reserve-before-build with ETag-CAS: concurrent builds can never mint the same
@@ -155,7 +167,7 @@ jobs:
             $override = [int]$env:BUILD_NUMBER_OVERRIDE
           }
 
-          $counterUrl = "https://autopilotmonitoreu.blob.core.windows.net/agent/buildcounter-v$($env:LINE_MAJOR).txt"
+          $counterUrl = "$env:AGENT_CONTAINER_URL/buildcounter-v$($env:LINE_MAJOR).txt"
           $buildNumber = & ./.github/scripts/Request-BuildNumber.ps1 -CounterUrl $counterUrl -Override $override
 
           $csproj = Get-Content $env:CSPROJ_PATH -Raw
@@ -172,22 +184,167 @@ jobs:
           "version=$version" >> $env:GITHUB_OUTPUT
           "tag=v$version" >> $env:GITHUB_OUTPUT
 
+  # Build zone: no login, no secret, no id-token. Its only output is the artifact; the
+  # release job treats that as data and never builds.
+  build:
+    name: Build and test
+    needs: reserve
+    runs-on: windows-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      # SDK 10 = single build toolchain (parity with local build.ps1 / global.json).
+      - name: Setup .NET
+        uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6.0.0
+        with:
+          dotnet-version: '10.0.x'
+
       - name: Restore dependencies
         run: |
           dotnet restore ${{ env.AGENT_PROJECT }}
           dotnet restore ${{ env.DIALOG_PROJECT }}
-          dotnet restore ${{ env.TEST_PROJECT }}
+          dotnet restore ${{ env.DECISIONCORE_TEST_PROJECT }}
+          dotnet restore ${{ env.CORE_TEST_PROJECT }}
+          dotnet restore ${{ env.DIALOG_TEST_PROJECT }}
+
+      # Every agent suite runs before the release build. ORDER AND BUILD_NUMBER ARE LOAD-BEARING:
+      # Agent.V2.Core.Tests references the agent exe, so the test build compiles it. With the
+      # reserved number it stamps the release version and the Build Agent step is up to date; run
+      # after that step or without the number, it would rewrite the binaries with another version.
+      - name: Run agent tests (all suites)
+        shell: pwsh
+        env:
+          BUILD_NUMBER: ${{ needs.reserve.outputs.build_number }}
+        run: |
+          foreach ($project in @($env:DECISIONCORE_TEST_PROJECT, $env:CORE_TEST_PROJECT, $env:DIALOG_TEST_PROJECT)) {
+            dotnet test $project --configuration Release --no-restore --verbosity quiet
+            if ($LASTEXITCODE -ne 0) { throw "Tests failed: $project" }
+          }
 
       - name: Build Agent
         run: dotnet build ${{ env.AGENT_PROJECT }} --configuration Release --no-restore
         env:
-          BUILD_NUMBER: ${{ steps.version.outputs.build_number }}
+          BUILD_NUMBER: ${{ needs.reserve.outputs.build_number }}
 
       - name: Build SummaryDialog
         run: dotnet build ${{ env.DIALOG_PROJECT }} --configuration Release --no-restore
 
-      - name: Run Agent unit tests
-        run: dotnet test ${{ env.TEST_PROJECT }} --configuration Release --no-restore --verbosity quiet
+      # One archive per output folder, unsigned. ZipFile rather than Compress-Archive, which
+      # skips hidden files.
+      - name: Package build output
+        shell: pwsh
+        run: |
+          $ErrorActionPreference = 'Stop'
+          Add-Type -AssemblyName System.IO.Compression.FileSystem
+          $outDir = Join-Path $env:RUNNER_TEMP 'agent-unsigned'
+          New-Item -Path $outDir -ItemType Directory -Force | Out-Null
+          [System.IO.Compression.ZipFile]::CreateFromDirectory((Join-Path $env:GITHUB_WORKSPACE $env:AGENT_OUTPUT), (Join-Path $outDir 'agent.zip'))
+          [System.IO.Compression.ZipFile]::CreateFromDirectory((Join-Path $env:GITHUB_WORKSPACE $env:DIALOG_OUTPUT), (Join-Path $outDir 'dialog.zip'))
+          Get-ChildItem $outDir | ForEach-Object { Write-Host "$($_.Name): $([math]::Round($_.Length / 1MB, 2)) MB" }
+
+      - name: Upload unsigned build output
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: agent-unsigned
+          path: ${{ runner.temp }}/agent-unsigned
+          if-no-files-found: error
+          retention-days: 1
+
+  # Trust zone: only this repository's scripts, pinned actions and the pinned signing tool
+  # run here -- never a restore or build. The build output arrives as data. The runner
+  # image's Windows SDK signtool is used read-only, to verify third-party signatures.
+  #
+  # No `environment:` yet: the code-signing credential is still bound to the ref, and a job
+  # carries exactly one OIDC subject, so an environment here would break the signing login.
+  release:
+    name: Sign and publish
+    needs: [reserve, build]
+    runs-on: windows-latest
+    permissions:
+      contents: write      # tag + GitHub Release
+      id-token: write      # code-signing and storage logins, keyless Sigstore signing
+      attestations: write  # store the provenance attestation
+    env:
+      AGENT_VERSION: ${{ needs.reserve.outputs.version }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      # Storage, legacy mirror, docs link, timestamp server: all from the endpoint registry.
+      - name: Load endpoints
+        shell: pwsh
+        run: ./.github/scripts/Get-Endpoints.ps1 -ExportToGitHubEnv
+
+      - name: Download unsigned build output
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          name: agent-unsigned
+          path: ${{ runner.temp }}/agent-unsigned
+
+      # Only the two expected archives, each into its own fresh output folder; the .NET
+      # extractor refuses entries that would land outside it. Never unpack into the checkout
+      # root: an archive could otherwise replace the scripts this job runs below.
+      - name: Unpack build output
+        shell: pwsh
+        run: |
+          $ErrorActionPreference = 'Stop'
+          Add-Type -AssemblyName System.IO.Compression.FileSystem
+          foreach ($pair in @(@('agent.zip', $env:AGENT_OUTPUT), @('dialog.zip', $env:DIALOG_OUTPUT))) {
+            $archive = Join-Path $env:RUNNER_TEMP "agent-unsigned/$($pair[0])"
+            $target = Join-Path $env:GITHUB_WORKSPACE $pair[1]
+            if (Test-Path $target) { throw "$($pair[1]) already exists -- refusing to unpack over it." }
+            [System.IO.Compression.ZipFile]::ExtractToDirectory($archive, $target)
+            Write-Host "Unpacked $($pair[0]) into $($pair[1])"
+          }
+
+      # Logs in FIRST and only to fetch the Key Vault token: azure/login sets the default az
+      # account, so the storage login below has to be the last one.
+      - name: Login to Azure (code-signing identity)
+        uses: azure/login@a641126d1b8aa4d1fa005f4f92df94a3a4c4c906 # v3.1.0
+        with:
+          client-id: ${{ env.CODE_SIGN_CLIENT_ID }}
+          tenant-id: ${{ secrets.AZURE_TENANT_ID }}
+          allow-no-subscriptions: true
+
+      - name: Acquire Key Vault token for signing
+        shell: pwsh
+        run: |
+          $ErrorActionPreference = 'Stop'
+          $token = az account get-access-token --scope https://vault.azure.net/.default --query accessToken --output tsv
+          if ($LASTEXITCODE -ne 0 -or [string]::IsNullOrWhiteSpace($token)) {
+            throw "Could not acquire a Key Vault token for the code-signing identity."
+          }
+          Write-Host "::add-mask::$token"
+          "CODE_SIGN_AKV_ACCESS_TOKEN=$token" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+
+      # Every storage write below (agent ZIP, manifests, AdminConfiguration) is authorized by
+      # this federated identity -- no SAS secret. Only the legacy mirror still needs a SAS:
+      # that account lives in the pre-migration tenant, where this principal has no identity.
+      - name: Login to Azure (OIDC)
+        uses: azure/login@a641126d1b8aa4d1fa005f4f92df94a3a4c4c906 # v3.1.0
+        with:
+          client-id: ${{ secrets.AZURE_CLIENT_ID }}
+          tenant-id: ${{ secrets.AZURE_TENANT_ID }}
+          subscription-id: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
+
+      # Runtime for AzureSignTool only; nothing is built in this job.
+      - name: Setup .NET
+        uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6.0.0
+        with:
+          dotnet-version: '10.0.x'
+
+      # Version pinned; roll-forward because the tool targets an older runtime than the SDK above.
+      - name: Install AzureSignTool
+        env:
+          DOTNET_ROLL_FORWARD: LatestMajor
+        run: dotnet tool install --no-cache --global AzureSignTool --version 7.0.1
 
       # Authenticode over everything we author; third-party assemblies keep their own signature.
       #
@@ -223,18 +380,17 @@ jobs:
             --timestamp-rfc3161 "$env:CODE_SIGN_TIMESTAMP_URL" `
             --file-digest sha256 `
             --description "Autopilot Monitor Agent" `
-            --description-url "https://www.autopilotmonitor.com" `
+            --description-url "$env:WWW_BASE_URL" `
             ($targets | ForEach-Object { $_.FullName })
 
           if ($LASTEXITCODE -ne 0) {
             throw "azuresigntool failed with exit code $LASTEXITCODE -- aborting before anything is published."
           }
 
-      - name: Create release artifact
-        id: artifact
+      - name: Stage release payload
         shell: pwsh
         run: |
-          $version = "${{ steps.version.outputs.version }}"
+          $version = $env:AGENT_VERSION
           $stagingDir = "staging/agent"
 
           if (-not (Test-Path "$env:AGENT_OUTPUT/AutopilotMonitor.Agent.exe")) {
@@ -276,6 +432,98 @@ jobs:
           }
           Write-Host "Version check passed: EXE = manifest = reserved = $version"
 
+      # Third-party code enters the payload only with its vendor's own signature: every PE that
+      # is not ours needs a valid EMBEDDED Authenticode signature from an allowed vendor. Embedded
+      # only (signtool verify /pa, no /a): Get-AuthenticodeSignature prefers the runner's Windows
+      # catalogs and reports "Microsoft Windows" for files Windows happens to ship as well. An
+      # unsigned file or a new vendor stops the release until a person decides. This guards the
+      # bytes we did not write; a build that alters our own code is D-346's remaining risk.
+      - name: Check third-party signatures
+        shell: pwsh
+        run: |
+          $ErrorActionPreference = 'Stop'
+          $allowedVendors = @('Microsoft Corporation', 'Json.NET (.NET Foundation)')
+
+          $signtool = Get-ChildItem "${env:ProgramFiles(x86)}\Windows Kits\10\bin\*\x64\signtool.exe" -ErrorAction SilentlyContinue |
+            Where-Object { $_.Directory.Parent.Name -match '^\d+(\.\d+){1,3}$' } |
+            Sort-Object { [version]$_.Directory.Parent.Name } -Descending |
+            Select-Object -First 1
+          if (-not $signtool) { throw "signtool.exe not found in the runner image's Windows SDK." }
+          Write-Host "Using $($signtool.FullName)"
+
+          $failed = $false
+          $checked = 0
+          foreach ($file in Get-ChildItem -Path 'staging/agent' -Recurse -File) {
+            # A PE by content (MZ header), not by extension.
+            $head = [byte[]]::new(2)
+            $stream = [System.IO.File]::OpenRead($file.FullName)
+            try { $read = $stream.Read($head, 0, 2) } finally { $stream.Dispose() }
+            if ($read -lt 2 -or $head[0] -ne 0x4D -or $head[1] -ne 0x5A) { continue }
+            if ($file.Name -like 'AutopilotMonitor.*') { continue }   # ours: the verify step pins them
+
+            $checked++
+            $output = & $signtool.FullName verify /pa $file.FullName 2>&1
+            if ($LASTEXITCODE -ne 0) {
+              Write-Host "::error file=$($file.Name)::No valid embedded vendor signature. $(($output | Out-String).Trim())"
+              $failed = $true
+              continue
+            }
+            $subject = [System.Security.Cryptography.X509Certificates.X509Certificate]::CreateFromSignedFile($file.FullName).Subject
+            $vendor = if ($subject -match '(?:^|,\s*)O=("[^"]*"|[^,]*)') { $Matches[1].Trim('"') } else { '' }
+            if ($vendor -notin $allowedVendors) {
+              Write-Host "::error file=$($file.Name)::Signed by '$subject' -- vendor '$vendor' is not on the allowlist."
+              $failed = $true
+              continue
+            }
+            Write-Host "$($file.Name): embedded signature valid, vendor $vendor"
+          }
+
+          if ($failed) { throw "Third-party signature check failed. Nothing was published." }
+          Write-Host "All $checked third-party PE files carry a valid signature from an allowed vendor."
+
+      # The payload contract: one catalog, signed like our binaries, holding the SHA-256 of every
+      # other file in the ZIP. Installer, OOBE script and self-updater accept a payload only when
+      # this catalog is ours and matches the extracted files exactly. Created AFTER signing and
+      # BEFORE the ZIP -- the same load-bearing position as the signing step above.
+      - name: Create and sign payload catalog
+        shell: pwsh
+        env:
+          DOTNET_ROLL_FORWARD: LatestMajor
+        run: |
+          $ErrorActionPreference = 'Stop'
+          $stagingDir = 'staging/agent'
+          $catalog = Join-Path $env:RUNNER_TEMP $env:PAYLOAD_CATALOG
+          if (Test-Path (Join-Path $stagingDir $env:PAYLOAD_CATALOG)) {
+            throw "$stagingDir already contains $env:PAYLOAD_CATALOG."
+          }
+
+          New-FileCatalog -Path $stagingDir -CatalogFilePath $catalog -CatalogVersion 2.0 | Out-Null
+
+          & azuresigntool.exe sign --verbose `
+            --azure-key-vault-url "$env:CODE_SIGN_KEY_VAULT_URL" `
+            --azure-key-vault-accesstoken "$env:CODE_SIGN_AKV_ACCESS_TOKEN" `
+            --azure-key-vault-certificate "$env:CODE_SIGN_CERTIFICATE_NAME" `
+            --timestamp-rfc3161 "$env:CODE_SIGN_TIMESTAMP_URL" `
+            --file-digest sha256 `
+            --description "Autopilot Monitor Agent" `
+            --description-url "$env:WWW_BASE_URL" `
+            $catalog
+          if ($LASTEXITCODE -ne 0) {
+            throw "azuresigntool failed on the payload catalog with exit code $LASTEXITCODE -- aborting before anything is published."
+          }
+
+          Copy-Item -Path $catalog -Destination $stagingDir
+          $count = (Test-FileCatalog -Path $stagingDir -CatalogFilePath $catalog -FilesToSkip $env:PAYLOAD_CATALOG -Detailed).CatalogItems.Count
+          Write-Host "Payload catalog signed: $count files"
+
+      - name: Create release artifact
+        id: artifact
+        shell: pwsh
+        run: |
+          $version = $env:AGENT_VERSION
+          $stagingDir = "staging/agent"
+          $manifest = Get-Content "$env:AGENT_OUTPUT/$env:MANIFEST_NAME" -Raw | ConvertFrom-Json
+
           $versionedZip = "AutopilotMonitor-Agent-v$version.zip"
           Compress-Archive -Path "$stagingDir/*" -DestinationPath $versionedZip
           Write-Host "Created GitHub-Release artifact: $versionedZip"
@@ -365,17 +613,76 @@ jobs:
           }
           Write-Host "All $($files.Count) binaries signed with certificate $($thumbprints.Keys -join ', ')"
 
+      # The devices' check, run on the FINAL ZIP rather than the staging folder: whatever the
+      # archiver did (Compress-Archive skips hidden files) fails here instead of on a device.
+      # Windows PowerShell 5.1, the edition installer and OOBE script verify with; the pin is
+      # the installer's own literal, the value devices compare against.
+      - name: Verify payload catalog (device check)
+        shell: powershell
+        env:
+          RELEASE_ZIP: ${{ steps.artifact.outputs.versioned_zip_release }}
+        run: |
+          $ErrorActionPreference = 'Stop'
+          Add-Type -AssemblyName System.IO.Compression.FileSystem
+
+          $payload = Join-Path $env:RUNNER_TEMP 'verify-payload'
+          if (Test-Path $payload) { throw "$payload already exists." }
+          [System.IO.Compression.ZipFile]::ExtractToDirectory((Resolve-Path $env:RELEASE_ZIP).Path, $payload)
+
+          $pinLine = Select-String -Path $env:BOOTSTRAP_SOURCE -Pattern '^\$ExpectedPublisher = "([^"]+)"' | Select-Object -First 1
+          if (-not $pinLine) { throw "Could not read the publisher pin from $env:BOOTSTRAP_SOURCE." }
+          $pin = $pinLine.Matches[0].Groups[1].Value
+          if (-not [string]::IsNullOrWhiteSpace($env:CODE_SIGN_EXPECTED_SUBJECT) -and $pin -ne $env:CODE_SIGN_EXPECTED_SUBJECT) {
+            throw "Installer pin '$pin' differs from CODE_SIGN_EXPECTED_SUBJECT '$env:CODE_SIGN_EXPECTED_SUBJECT'."
+          }
+
+          $catalog = Join-Path $payload $env:PAYLOAD_CATALOG
+          if (-not (Test-Path $catalog -PathType Leaf)) { throw "$env:PAYLOAD_CATALOG is missing from the ZIP." }
+          $result = Test-FileCatalog -Path $payload -CatalogFilePath $catalog -FilesToSkip $env:PAYLOAD_CATALOG -Detailed
+
+          $problems = @()
+          if ($result.Status -ne 'Valid') {
+            $expected = $result.CatalogItems
+            $actual = $result.PathItems
+            $missing = @($expected.Keys | Where-Object { -not $actual.ContainsKey($_) })
+            $extra = @($actual.Keys | Where-Object { -not $expected.ContainsKey($_) })
+            $changed = @($expected.Keys | Where-Object { $actual.ContainsKey($_) -and $actual[$_] -ne $expected[$_] })
+            $problems += "payload differs from the catalog (missing: $($missing -join ', '); extra: $($extra -join ', '); changed: $($changed -join ', '))"
+          }
+          $signature = $result.Signature
+          if ($signature.Status -ne 'Valid') {
+            $problems += "catalog signature status is '$($signature.Status)'"
+          } elseif ($signature.SignerCertificate.Subject -notlike $pin) {
+            $problems += "catalog signed by '$($signature.SignerCertificate.Subject)', expected '$pin'"
+          }
+          if (-not $signature.TimeStamperCertificate) {
+            $problems += 'catalog signature carries no RFC-3161 timestamp -- it would expire with the certificate'
+          }
+          $exeSigner = (Get-AuthenticodeSignature (Join-Path $payload 'AutopilotMonitor.Agent.exe')).SignerCertificate
+          if ($signature.SignerCertificate -and $exeSigner -and $signature.SignerCertificate.Thumbprint -ne $exeSigner.Thumbprint) {
+            $problems += 'catalog and agent exe carry different signing certificates'
+          }
+
+          if ($problems.Count -gt 0) {
+            $problems | ForEach-Object { Write-Host "::error::$_" }
+            throw "Payload catalog verification failed. Nothing was published."
+          }
+          Write-Host "Payload catalog verified on the final ZIP: $($result.CatalogItems.Count) files, signer $($signature.SignerCertificate.Subject)"
+
       - name: Upload to Azure Blob Storage
         if: inputs.upload_blob
         shell: pwsh
+        env:
+          ZIP_SHA256: ${{ steps.artifact.outputs.sha256 }}
+          EXE_SHA256: ${{ steps.artifact.outputs.exe_sha256 }}
         run: |
-          $containerUrl = "https://autopilotmonitoreu.blob.core.windows.net/agent"
+          $containerUrl = $env:AGENT_CONTAINER_URL
           $authHeaders = & ./.github/scripts/Get-StorageAuthHeaders.ps1
           # Legacy mirror (transition until customers moved to the download.-alias):
           # blobs are ALSO pushed to the old account so the bootstrap URL baked into
           # customers' Intune scripts keeps serving current bits. Fail-soft -- a
           # legacy hiccup must never fail a release. Counter lives ONLY on eu.
-          $legacyContainerUrl = "https://autopilotmonitor.blob.core.windows.net/agent"
+          $legacyContainerUrl = $env:LEGACY_AGENT_CONTAINER_URL
           $legacySasToken = "${{ secrets.AZURE_BLOB_AGENT_LEGACY_SAS_TOKEN }}".TrimStart('?')
 
           function Send-Blob {
@@ -405,6 +712,18 @@ jobs:
             }
           }
 
+          # Dev channel: lab blobs only, under the names the dev renders of the bootstrap scripts
+          # read. Nothing else is touched -- no versioned or stable line, no AdminConfiguration, no
+          # scripts; the channel check in `reserve` already refused publish_as_stable/create_release.
+          if ($env:CHANNEL -eq 'dev') {
+            Send-Blob -Local $env:VERSIONED_ZIP -BlobName $env:DEV_VERSIONED_ZIP -ContentType "application/zip"
+            Send-Blob -Local $env:MANIFEST_NAME -BlobName $env:DEV_MANIFEST -ContentType "application/json"
+            Send-Blob -Local $env:VERSIONED_ZIP -BlobName $env:DEV_STABLE_ZIP -ContentType "application/zip"
+            Send-Blob -Local $env:MANIFEST_NAME -BlobName $env:DEV_STABLE_MANIFEST -ContentType "application/json"
+            Write-Host "DEV CHANNEL: lab blobs written, nothing else touched."
+            exit 0
+          }
+
           # Versioned namespace (always)
           Send-Blob -Local $env:VERSIONED_ZIP -BlobName $env:VERSIONED_ZIP -ContentType "application/zip"
           Send-Blob -Local $env:MANIFEST_NAME -BlobName $env:MANIFEST_NAME -ContentType "application/json"
@@ -426,7 +745,6 @@ jobs:
               -SigningToken $env:CODE_SIGN_AKV_ACCESS_TOKEN `
               -KeyVaultUrl $env:CODE_SIGN_KEY_VAULT_URL `
               -CertificateName $env:CODE_SIGN_CERTIFICATE_NAME `
-              -TimestampUrl $env:CODE_SIGN_TIMESTAMP_URL `
               -ExpectedPublisher $env:CODE_SIGN_EXPECTED_SUBJECT
           }
 
@@ -437,10 +755,10 @@ jobs:
           if ('${{ inputs.publish_as_stable }}' -ne 'true') {
             Write-Host "SKIPPED: AdminConfiguration update (versioned-only run -- stable namespace unchanged)"
           } else {
-            $sha256 = "${{ steps.artifact.outputs.sha256 }}"
-            $exeSha256 = "${{ steps.artifact.outputs.exe_sha256 }}"
-            $agentVersion = "${{ steps.version.outputs.version }}"
-            $tableUrl = "https://autopilotmonitoreu.table.core.windows.net/AdminConfiguration(PartitionKey='GlobalConfig',RowKey='config')"
+            $sha256 = $env:ZIP_SHA256
+            $exeSha256 = $env:EXE_SHA256
+            $agentVersion = $env:AGENT_VERSION
+            $tableUrl = $env:ADMIN_CONFIG_URL
             $tableBody = @{
               LatestAgentV2Version    = $agentVersion
               LatestAgentV2Sha256     = $sha256
@@ -464,7 +782,7 @@ jobs:
       # Skipped on runs that publish nothing -- no log entry for bytes nobody receives.
       - name: Attest build provenance
         if: inputs.upload_blob || inputs.create_release
-        uses: actions/attest-build-provenance@4d101475d8b20a2381f78447822ac1eab6504dd8 # v4
+        uses: actions/attest-build-provenance@4d101475d8b20a2381f78447822ac1eab6504dd8 # v4.2.2
         with:
           subject-path: |
             ${{ steps.artifact.outputs.versioned_zip_release }}
@@ -472,13 +790,13 @@ jobs:
             staging/agent/AutopilotMonitor.SummaryDialog.exe
 
       - name: Upload build artifact
-        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
-          name: AutopilotMonitor-Agent-v${{ steps.version.outputs.version }}
+          name: AutopilotMonitor-Agent-v${{ needs.reserve.outputs.version }}
           path: ${{ steps.artifact.outputs.versioned_zip_release }}
 
       - name: Upload version metadata
-        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           name: version-metadata
           path: ${{ env.MANIFEST_NAME }}
@@ -497,30 +815,30 @@ jobs:
         shell: pwsh
         env:
           GH_TOKEN: ${{ github.token }}
-          RELEASE_TAG: ${{ steps.version.outputs.tag }}
-          RELEASE_NAME: Autopilot Monitor Agent ${{ steps.version.outputs.version }}
+          RELEASE_TAG: ${{ needs.reserve.outputs.tag }}
+          RELEASE_NAME: Autopilot Monitor Agent ${{ needs.reserve.outputs.version }}
           RELEASE_PRERELEASE: ${{ inputs.prerelease }}
           RELEASE_ZIP: ${{ steps.artifact.outputs.versioned_zip_release }}
           RELEASE_NOTES: ${{ inputs.release_notes }}
           RELEASE_BODY_TAIL: |
             ### Version Info
-            - **Version:** ${{ steps.version.outputs.version }}
-            - **Build Number:** ${{ steps.version.outputs.build_number }}
+            - **Version:** ${{ needs.reserve.outputs.version }}
+            - **Build Number:** ${{ needs.reserve.outputs.build_number }}
             - **SHA-256:** `${{ steps.artifact.outputs.sha256 }}`
             - **Built from:** ${{ github.sha }}
             - **Published as stable:** ${{ inputs.publish_as_stable }}
 
             ### Provenance
-            The executables are Authenticode-signed and timestamped. The ZIP and both executables carry a [GitHub Artifact Attestation](https://github.com/okieselbach/AutopilotMonitor/attestations) (Sigstore keyless). Verify:
+            The executables are Authenticode-signed and timestamped. Every file in the ZIP is listed in `AutopilotMonitor.Agent.cat`, a catalog signed with the same certificate, and third-party libraries carry their vendor's signature. The ZIP and both executables carry a [GitHub Artifact Attestation](https://github.com/okieselbach/AutopilotMonitor/attestations) (Sigstore keyless). Verify:
             ```
-            gh attestation verify AutopilotMonitor-Agent-v${{ steps.version.outputs.version }}.zip --repo okieselbach/AutopilotMonitor
+            gh attestation verify AutopilotMonitor-Agent-v${{ needs.reserve.outputs.version }}.zip --repo okieselbach/AutopilotMonitor
             ```
         run: |
           $ErrorActionPreference = 'Stop'
 
           $notes = "$env:RELEASE_NOTES".Trim()
           if ($notes -eq '') {
-            $notes = "Minor enhancements and bug fixes. See the [Agent Changelog](https://docs.autopilotmonitor.com/changelog/agent-changelog) for details.`n<!-- release-notes: none -->"
+            $notes = "Minor enhancements and bug fixes. See the [Agent Changelog]($env:DOCS_BASE_URL/changelog/agent-changelog) for details.`n<!-- release-notes: none -->"
           }
 
           # Previous release for the compare link. Fail-soft: the first release has none,

.github/workflows/build-msi.yml

@@ -11,39 +11,54 @@ on:
   workflow_dispatch:
     inputs:
       upload_blob:
-        description: 'Upload to blob (customer-facing via download.autopilotmonitor.com/agent/)'
+        description: 'Upload to blob (customer-facing through the download alias)'
         required: true
         type: boolean
         default: true
 
+# Every job states its own permissions. This default is what the build job runs with: wix is
+# third-party code and must never hold more than a read-only token.
 permissions:
   contents: read
-  id-token: write      # keyless Sigstore signing (artifact attestation)
-  attestations: write  # store the provenance attestation
 
 env:
   MSI_PROJECT_DIR: src/Agent/AutopilotMonitor.BootstrapMsi
   RUNNER_SCRIPT: scripts/Bootstrap/Start-AutopilotMonitor.ps1
   STABLE_MSI: AutopilotMonitor-Bootstrap.msi
-  # Authenticode via Azure Key Vault; identity and vault come from repository variables.
+  # Authenticode via Azure Key Vault; identity and vault come from repository variables, the
+  # timestamp server (CODE_SIGN_TIMESTAMP_URL) from the endpoint registry like every host here.
   # CODE_SIGN_EXPECTED_SUBJECT is optional and pins the publisher in the verify steps.
   CODE_SIGN_CLIENT_ID: ${{ vars.CODE_SIGN_CLIENT_ID }}
   CODE_SIGN_CERTIFICATE_NAME: ${{ vars.CODE_SIGN_CERTIFICATE_NAME }}
   CODE_SIGN_KEY_VAULT_URL: ${{ vars.CODE_SIGN_KEY_VAULT_URL }}
   CODE_SIGN_EXPECTED_SUBJECT: ${{ vars.CODE_SIGN_EXPECTED_SUBJECT }}
-  CODE_SIGN_TIMESTAMP_URL: http://timestamp.acs.microsoft.com
 
 jobs:
-  build:
+  # Signs the loader BEFORE the build: wix embeds the file as it finds it, so a loader signed
+  # afterwards would leave the copy inside the MSI unsigned. Devices under an AllSigned policy
+  # need the embedded loader to carry a signature of its own.
+  #
+  # Trust zone: only this repository's scripts, pinned actions and the pinned signing tool run
+  # here. No `environment:` yet: the code-signing credential is still bound to the ref, and a
+  # job carries exactly one OIDC subject.
+  sign-loader:
+    name: Sign bootstrap loader
     runs-on: windows-latest
-    name: Build Bootstrap MSI
+    permissions:
+      contents: read
+      id-token: write   # code-signing login
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
 
+      # Every host in this workflow comes from the one endpoint registry.
+      - name: Load endpoints
+        shell: pwsh
+        run: ./.github/scripts/Get-Endpoints.ps1 -ExportToGitHubEnv
+
       # The loader executes as SYSTEM on every enrolling device — a parse error or
       # non-ASCII mojibake (PS 5.1 codepage roulette) must fail the build, not the fleet.
       # bootstrap-script-gates.yml runs the same checks plus Pester on pushes; this job
@@ -60,6 +75,151 @@ jobs:
           }
           Write-Host "Runner script parse + ASCII check passed"
 
+      # Every published MSI is signed; a missing variable stops the run before the build.
+      - name: Check code-signing configuration
+        shell: pwsh
+        run: |
+          foreach ($name in 'CODE_SIGN_CLIENT_ID', 'CODE_SIGN_CERTIFICATE_NAME', 'CODE_SIGN_KEY_VAULT_URL') {
+            if ([string]::IsNullOrWhiteSpace([Environment]::GetEnvironmentVariable($name))) {
+              throw "Repository variable $name is not set. Every published MSI must be Authenticode-signed."
+            }
+          }
+
+      - name: Login to Azure (code-signing identity)
+        uses: azure/login@a641126d1b8aa4d1fa005f4f92df94a3a4c4c906 # v3.1.0
+        with:
+          client-id: ${{ env.CODE_SIGN_CLIENT_ID }}
+          tenant-id: ${{ secrets.AZURE_TENANT_ID }}
+          allow-no-subscriptions: true
+
+      - name: Acquire Key Vault token for signing
+        shell: pwsh
+        run: |
+          $ErrorActionPreference = 'Stop'
+          $token = az account get-access-token --scope https://vault.azure.net/.default --query accessToken --output tsv
+          if ($LASTEXITCODE -ne 0 -or [string]::IsNullOrWhiteSpace($token)) {
+            throw "Could not acquire a Key Vault token for the code-signing identity."
+          }
+          Write-Host "::add-mask::$token"
+          "CODE_SIGN_AKV_ACCESS_TOKEN=$token" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+
+      # Version pinned; roll-forward because the tool targets an older runtime than the SDK.
+      - name: Install AzureSignTool
+        env:
+          DOTNET_ROLL_FORWARD: LatestMajor
+        run: dotnet tool install --no-cache --global AzureSignTool --version 7.0.1
+
+      # A missing timestamp fails the run: without it the signature dies with the certificate.
+      - name: Sign bootstrap loader (Authenticode)
+        shell: pwsh
+        env:
+          DOTNET_ROLL_FORWARD: LatestMajor
+        run: |
+          $ErrorActionPreference = 'Stop'
+          & azuresigntool.exe sign --verbose `
+            --azure-key-vault-url "$env:CODE_SIGN_KEY_VAULT_URL" `
+            --azure-key-vault-accesstoken "$env:CODE_SIGN_AKV_ACCESS_TOKEN" `
+            --azure-key-vault-certificate "$env:CODE_SIGN_CERTIFICATE_NAME" `
+            --timestamp-rfc3161 "$env:CODE_SIGN_TIMESTAMP_URL" `
+            --file-digest sha256 `
+            --description 'Autopilot Monitor bootstrap runner' `
+            --description-url $env:WWW_BASE_URL `
+            $env:RUNNER_SCRIPT
+          if ($LASTEXITCODE -ne 0) { throw "azuresigntool failed with exit code $LASTEXITCODE" }
+
+          $sig = Get-AuthenticodeSignature -FilePath $env:RUNNER_SCRIPT
+          if ($sig.Status -ne 'Valid') { throw "Signature on $env:RUNNER_SCRIPT is '$($sig.Status)', expected 'Valid'." }
+          if (-not $sig.TimeStamperCertificate) { throw "Signature on $env:RUNNER_SCRIPT carries no timestamp." }
+          if ($env:CODE_SIGN_EXPECTED_SUBJECT -and $sig.SignerCertificate.Subject -notlike $env:CODE_SIGN_EXPECTED_SUBJECT) {
+            throw "$env:RUNNER_SCRIPT was signed by '$($sig.SignerCertificate.Subject)', expected '$env:CODE_SIGN_EXPECTED_SUBJECT'."
+          }
+          Write-Host "$env:RUNNER_SCRIPT : Valid, timestamped, signer $($sig.SignerCertificate.Subject.Split(',')[0])"
+
+      - name: Upload signed loader
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: bootstrap-loader-signed
+          path: ${{ env.RUNNER_SCRIPT }}
+          if-no-files-found: error
+          retention-days: 1
+
+  # Build zone: no login, no secret, no id-token. Its only output is the artifact; the
+  # release job treats that as data and never builds.
+  build:
+    name: Build MSI
+    needs: sign-loader
+    runs-on: windows-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      - name: Download signed loader
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          name: bootstrap-loader-signed
+          path: ${{ runner.temp }}/loader
+
+      # The signed copy replaces the checkout's unsigned one before wix embeds it.
+      - name: Put the signed loader in place
+        shell: pwsh
+        run: |
+          $ErrorActionPreference = 'Stop'
+          Copy-Item -Path (Join-Path $env:RUNNER_TEMP 'loader/Start-AutopilotMonitor.ps1') -Destination $env:RUNNER_SCRIPT -Force
+          $sig = Get-AuthenticodeSignature -FilePath $env:RUNNER_SCRIPT
+          if ($sig.Status -ne 'Valid') { throw "Loader to embed is '$($sig.Status)', expected 'Valid'." }
+          Write-Host "Embedding the signed loader ($((Get-Item $env:RUNNER_SCRIPT).Length) bytes)"
+
+      # Exact version, not a "5.*" range: wix writes the bytes of the MSI that customers
+      # install, so a compromised or simply broken point release must not flow into a build
+      # unnoticed. Bumping is a reviewed commit.
+      - name: Install WiX toolset
+        run: dotnet tool install --global wix --version 5.0.2
+
+      - name: Build MSI
+        shell: pwsh
+        run: |
+          # wix resolves File/@Source relative to the working directory, not the wxs —
+          # build from inside the project dir (same as the local build documented in the wxs).
+          $out = Join-Path (Get-Location) $env:STABLE_MSI
+          Push-Location $env:MSI_PROJECT_DIR
+          wix build Package.wxs -arch x64 -o $out
+          Pop-Location
+          if (-not (Test-Path $env:STABLE_MSI)) { Write-Error "wix build produced no MSI"; exit 1 }
+          Write-Host "Built $env:STABLE_MSI ($([math]::Round((Get-Item $env:STABLE_MSI).Length / 1KB)) KB)"
+
+      - name: Upload unsigned MSI
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: bootstrap-msi-unsigned
+          path: ${{ env.STABLE_MSI }}
+          if-no-files-found: error
+          retention-days: 1
+
+  # Trust zone: signs, verifies and publishes the MSI as data; never builds. No
+  # `environment:` yet, for the same reason as sign-loader.
+  release:
+    name: Sign and publish MSI
+    needs: build
+    runs-on: windows-latest
+    permissions:
+      contents: read
+      id-token: write      # code-signing and storage logins, keyless Sigstore signing
+      attestations: write  # store the provenance attestation
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      - name: Load endpoints
+        shell: pwsh
+        run: ./.github/scripts/Get-Endpoints.ps1 -ExportToGitHubEnv
+
+      # Read from this job's own checkout, never handed over by the build job.
       - name: Read MSI version from Package.wxs
         id: version
         shell: pwsh
@@ -73,20 +233,19 @@ jobs:
           Write-Host "MSI version (from Package.wxs): $version"
           "version=$version" >> $env:GITHUB_OUTPUT
 
-      # Every published MSI is signed; a missing variable stops the run before the build.
-      - name: Check code-signing configuration
+      - name: Download unsigned MSI
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          name: bootstrap-msi-unsigned
+          path: ${{ runner.temp }}/msi
+
+      # Only the expected file leaves the download folder.
+      - name: Take the MSI from the build
         shell: pwsh
-        run: |
-          foreach ($name in 'CODE_SIGN_CLIENT_ID', 'CODE_SIGN_CERTIFICATE_NAME', 'CODE_SIGN_KEY_VAULT_URL') {
-            if ([string]::IsNullOrWhiteSpace([Environment]::GetEnvironmentVariable($name))) {
-              throw "Repository variable $name is not set. Every published MSI must be Authenticode-signed."
-            }
-          }
+        run: Copy-Item -Path (Join-Path $env:RUNNER_TEMP "msi/$env:STABLE_MSI") -Destination $env:STABLE_MSI -ErrorAction Stop
 
       # Logs in FIRST and only to fetch the Key Vault token: azure/login sets the default az
-      # account, so the storage login below has to be the last one. Both federated credentials
-      # are bound to the ref, so this job must never be given an `environment:` -- that would
-      # change the OIDC subject claim and break both logins.
+      # account, so the storage login below has to be the last one.
       - name: Login to Azure (code-signing identity)
         uses: azure/login@a641126d1b8aa4d1fa005f4f92df94a3a4c4c906 # v3.1.0
         with:
@@ -113,50 +272,12 @@ jobs:
           tenant-id: ${{ secrets.AZURE_TENANT_ID }}
           subscription-id: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
 
-      # Exact version, not a "5.*" range: wix writes the bytes of the MSI that customers
-      # install, so a compromised or simply broken point release must not flow into a build
-      # unnoticed. Bumping is a reviewed commit.
-      - name: Install WiX toolset
-        run: dotnet tool install --global wix --version 5.0.2
-
       # Version pinned; roll-forward because the tool targets an older runtime than the SDK.
       - name: Install AzureSignTool
         env:
           DOTNET_ROLL_FORWARD: LatestMajor
         run: dotnet tool install --no-cache --global AzureSignTool --version 7.0.1
 
-      # BEFORE the build: wix embeds the file as it finds it, so a loader signed afterwards
-      # would leave the copy inside the MSI unsigned. Devices under an AllSigned policy need
-      # the embedded loader to carry a signature of its own.
-      - name: Sign bootstrap loader (Authenticode)
-        shell: pwsh
-        env:
-          DOTNET_ROLL_FORWARD: LatestMajor
-        run: |
-          $ErrorActionPreference = 'Stop'
-          & azuresigntool.exe sign --verbose `
-            --azure-key-vault-url "$env:CODE_SIGN_KEY_VAULT_URL" `
-            --azure-key-vault-accesstoken "$env:CODE_SIGN_AKV_ACCESS_TOKEN" `
-            --azure-key-vault-certificate "$env:CODE_SIGN_CERTIFICATE_NAME" `
-            --timestamp-rfc3161 "$env:CODE_SIGN_TIMESTAMP_URL" `
-            --file-digest sha256 `
-            --description 'Autopilot Monitor bootstrap runner' `
-            --description-url 'https://www.autopilotmonitor.com' `
-            $env:RUNNER_SCRIPT
-          if ($LASTEXITCODE -ne 0) { throw "azuresigntool failed with exit code $LASTEXITCODE" }
-
-      - name: Build MSI
-        shell: pwsh
-        run: |
-          # wix resolves File/@Source relative to the working directory, not the wxs —
-          # build from inside the project dir (same as the local build documented in the wxs).
-          $out = Join-Path (Get-Location) $env:STABLE_MSI
-          Push-Location $env:MSI_PROJECT_DIR
-          wix build Package.wxs -arch x64 -o $out
-          Pop-Location
-          if (-not (Test-Path $env:STABLE_MSI)) { Write-Error "wix build produced no MSI"; exit 1 }
-          Write-Host "Built $env:STABLE_MSI ($([math]::Round((Get-Item $env:STABLE_MSI).Length / 1KB)) KB)"
-
       # Signing rewrites the MSI, so it runs before the hash and the upload. A missing
       # timestamp fails the run: without it the signature dies with the certificate.
       - name: Sign MSI (Authenticode)
@@ -172,30 +293,30 @@ jobs:
             --timestamp-rfc3161 "$env:CODE_SIGN_TIMESTAMP_URL" `
             --file-digest sha256 `
             --description 'Autopilot Monitor Bootstrap' `
-            --description-url 'https://www.autopilotmonitor.com' `
+            --description-url $env:WWW_BASE_URL `
             $env:STABLE_MSI
           if ($LASTEXITCODE -ne 0) { throw "azuresigntool failed with exit code $LASTEXITCODE" }
 
-          # The MSI and the loader it carries -- verified here, before anything is published.
-          foreach ($file in @($env:STABLE_MSI, $env:RUNNER_SCRIPT)) {
-            $sig = Get-AuthenticodeSignature -FilePath $file
-            if ($sig.Status -ne 'Valid') { throw "Signature on $file is '$($sig.Status)', expected 'Valid'." }
-            if (-not $sig.TimeStamperCertificate) { throw "Signature on $file carries no timestamp." }
-            if ($env:CODE_SIGN_EXPECTED_SUBJECT -and $sig.SignerCertificate.Subject -notlike $env:CODE_SIGN_EXPECTED_SUBJECT) {
-              throw "$file was signed by '$($sig.SignerCertificate.Subject)', expected '$env:CODE_SIGN_EXPECTED_SUBJECT'."
-            }
-            Write-Host "$file : Valid, timestamped, signer $($sig.SignerCertificate.Subject.Split(',')[0])"
+          # The loader was verified in sign-loader; here the MSI, before anything is published.
+          $sig = Get-AuthenticodeSignature -FilePath $env:STABLE_MSI
+          if ($sig.Status -ne 'Valid') { throw "Signature on $env:STABLE_MSI is '$($sig.Status)', expected 'Valid'." }
+          if (-not $sig.TimeStamperCertificate) { throw "Signature on $env:STABLE_MSI carries no timestamp." }
+          if ($env:CODE_SIGN_EXPECTED_SUBJECT -and $sig.SignerCertificate.Subject -notlike $env:CODE_SIGN_EXPECTED_SUBJECT) {
+            throw "$env:STABLE_MSI was signed by '$($sig.SignerCertificate.Subject)', expected '$env:CODE_SIGN_EXPECTED_SUBJECT'."
           }
+          Write-Host "$env:STABLE_MSI : Valid, timestamped, signer $($sig.SignerCertificate.Subject.Split(',')[0])"
 
           Write-Host "SHA-256: $((Get-FileHash $env:STABLE_MSI -Algorithm SHA256).Hash.ToLowerInvariant())"
 
       - name: Upload to Azure Blob Storage
         if: inputs.upload_blob
         shell: pwsh
+        env:
+          MSI_VERSION: ${{ steps.version.outputs.version }}
         run: |
-          $containerUrl = "https://autopilotmonitoreu.blob.core.windows.net/agent"
+          $containerUrl = $env:AGENT_CONTAINER_URL
           $authHeaders = & ./.github/scripts/Get-StorageAuthHeaders.ps1
-          $version = "${{ steps.version.outputs.version }}"
+          $version = $env:MSI_VERSION
 
           # Same Send-Blob contract as build-agent.yml: no-cache on every blob because the
           # stable name rotates in place behind the download alias. No legacy mirror — the
@@ -226,26 +347,26 @@ jobs:
         shell: pwsh
         run: |
           $localSize = (Get-Item $env:STABLE_MSI).Length
-          $resp = Invoke-WebRequest -Uri "https://download.autopilotmonitor.com/agent/$env:STABLE_MSI" -Method Head -UseBasicParsing
+          $resp = Invoke-WebRequest -Uri "$env:DOWNLOAD_ALIAS_URL/$env:STABLE_MSI" -Method Head -UseBasicParsing
           if ($resp.StatusCode -ne 200) { Write-Error "Alias HEAD returned $($resp.StatusCode)"; exit 1 }
           $remoteSize = [long]$resp.Headers['Content-Length'][0]
           if ($remoteSize -ne $localSize) {
             Write-Error "Size mismatch: alias serves $remoteSize bytes, local MSI is $localSize bytes"
             exit 1
           }
-          Write-Host "Alias verified: https://download.autopilotmonitor.com/agent/$env:STABLE_MSI ($remoteSize bytes)"
+          Write-Host "Alias verified: $env:DOWNLOAD_ALIAS_URL/$env:STABLE_MSI ($remoteSize bytes)"
 
       # Sigstore keyless provenance, same as the agent ZIP; covers the signed bytes. Skipped
       # on runs that publish nothing -- no log entry for bytes nobody receives. Verify:
       # gh attestation verify AutopilotMonitor-Bootstrap.msi --repo okieselbach/AutopilotMonitor
       - name: Attest build provenance (MSI)
         if: inputs.upload_blob
-        uses: actions/attest-build-provenance@4d101475d8b20a2381f78447822ac1eab6504dd8 # v4
+        uses: actions/attest-build-provenance@4d101475d8b20a2381f78447822ac1eab6504dd8 # v4.2.2
         with:
           subject-path: ${{ env.STABLE_MSI }}
 
       - name: Upload build artifact
-        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           name: AutopilotMonitor-Bootstrap-v${{ steps.version.outputs.version }}
           path: ${{ env.STABLE_MSI }}

.github/workflows/ci.yml

@@ -1,8 +1,8 @@
 name: CI
 
 # Tests, typechecks and drift-checks every push to main and every pull request:
-# the .NET suites, the web and MCP suites, and a guard that the generated rule
-# files still match rules/guardrails.json.
+# the .NET suites, the web and MCP suites, a guard that the generated rule
+# files still match rules/guardrails.json, and the duplicate-code check.
 #
 # The deploy workflows build but never test, so this is the only place the suites
 # actually run. It does not gate anything — main is deliberately unprotected, so a
@@ -46,7 +46,6 @@ on:
       - '.github/workflows/deploy-mcp.yml'
       - '.github/workflows/deploy-web.yml'
       - '.github/workflows/indexnow-notify.yml'
-      - '.github/workflows/oidc-login-test.yml'
       - '.github/workflows/pester.yml'
       - '.github/workflows/publish-scripts.yml'
   pull_request:
@@ -80,7 +79,6 @@ on:
       - '.github/workflows/deploy-mcp.yml'
       - '.github/workflows/deploy-web.yml'
       - '.github/workflows/indexnow-notify.yml'
-      - '.github/workflows/oidc-login-test.yml'
       - '.github/workflows/pester.yml'
       - '.github/workflows/publish-scripts.yml'
   workflow_dispatch:
@@ -98,11 +96,11 @@ jobs:
     # windows-latest is required: the agent test projects target net48.
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
 
-      - uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6
+      - uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6.0.0
         with:
           dotnet-version: '10.0.x'
 
@@ -124,6 +122,9 @@ jobs:
       - name: Summary Dialog tests
         run: dotnet test src/Agent/AutopilotMonitor.SummaryDialog.Tests --configuration Release --no-build --verbosity quiet --logger "console;verbosity=minimal"
 
+      - name: Push tests
+        run: dotnet test src/Push/AutopilotMonitor.Push.Tests --configuration Release --no-build --verbosity quiet --logger "console;verbosity=minimal"
+
   web:
     name: Web (typecheck + tests)
     runs-on: ubuntu-latest
@@ -131,11 +132,11 @@ jobs:
       run:
         working-directory: src/Web/autopilot-monitor-web
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
 
-      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7
+      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
           node-version: '22'
           cache: npm
@@ -157,6 +158,12 @@ jobs:
       - name: Lint
         run: npm run lint -- --max-warnings 0
 
+      # Unused files, exports and dependencies (knip.json). Its own script on
+      # purpose: chained into `lint`, the `-- --max-warnings 0` above would be
+      # handed to knip and ESLint would lose its cap.
+      - name: Unused code
+        run: npm run knip
+
       - name: Tests
         run: npm test
 
@@ -167,11 +174,11 @@ jobs:
       run:
         working-directory: src/McpServer/autopilot-monitor-mcp
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
 
-      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7
+      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
           node-version: '22'
           cache: npm
@@ -179,9 +186,19 @@ jobs:
 
       - run: npm ci
 
+      # tsconfig.json covers sources, tests and scripts; the build emits via
+      # tsconfig.build.json.
       - name: Typecheck
         run: npx tsc --noEmit
 
+      # Same rule as the web job: any warning fails — fix new findings, never
+      # raise the cap.
+      - name: Lint
+        run: npm run lint -- --max-warnings 0
+
+      - name: Unused code
+        run: npm run knip
+
       # The vector-search tests tokenize with the real all-MiniLM-L6-v2 model
       # (~23 MB tokenizer + ONNX weights). transformers.js caches under
       # node_modules by default, which npm ci recreates — so every CI run
@@ -189,7 +206,7 @@ jobs:
       # (run 31252869254). Persist the model across runs instead; HF_CACHE_DIR
       # is honored by vector-search-provider.ts.
       - name: Cache embedding model
-        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         with:
           path: ${{ github.workspace }}/.hf-cache
           key: hf-model-Xenova-all-MiniLM-L6-v2
@@ -203,11 +220,11 @@ jobs:
     name: Generated guardrails match rules/guardrails.json
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
 
-      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7
+      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
           node-version: '22'
 
@@ -226,11 +243,11 @@ jobs:
     name: Generated wire types match shared-manifests.json
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
 
-      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7
+      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
           node-version: '22'
 
@@ -244,8 +261,33 @@ jobs:
 
       - name: Fail if the generated files drifted
         run: |
-          if ! git diff --quiet -- src/Web/autopilot-monitor-web/utils/shared-manifests.generated.ts src/Web/autopilot-monitor-web/utils/wire-types.generated.ts src/McpServer/autopilot-monitor-mcp/src/generated/wire-types.generated.ts src/McpServer/autopilot-monitor-mcp/src/generated/wire-vocabularies.generated.ts; then
+          if ! git diff --quiet -- src/Web/autopilot-monitor-web/lib/generated/shared-manifests.generated.ts src/Web/autopilot-monitor-web/lib/generated/wire-types.generated.ts src/McpServer/autopilot-monitor-mcp/src/generated/wire-types.generated.ts src/McpServer/autopilot-monitor-mcp/src/generated/wire-vocabularies.generated.ts; then
             echo "::error::Generated wire types are out of date. Run 'npm run generate:manifests' in src/Web/autopilot-monitor-web and commit the result."
             git diff --stat
             exit 1
           fi
+
+  duplicates:
+    name: Duplicate code
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: tools/quality
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
+        with:
+          node-version: '22'
+          cache: npm
+          cache-dependency-path: tools/quality/package-lock.json
+
+      - run: npm ci --ignore-scripts
+
+      # jscpd over the C# and TypeScript sources (.jscpd.json). A clone missing from
+      # jscpd-baseline.json fails, and so does a baseline entry whose clone is gone,
+      # so the baseline only shrinks. Locally: npm run dup in tools/quality.
+      - name: Duplicate check
+        run: npm run dup

.github/workflows/codeql.yml

@@ -28,6 +28,7 @@ on:
       # Every other workflow: none of them changes the C# or TypeScript CodeQL analyzes.
       # paths-ignore cannot negate, so they are listed one by one; codeql.yml itself and
       # .github/codeql/ stay out of the list. A new workflow file is opt-in — add it here too.
+      - '.github/workflows/action-pins.yml'
       - '.github/workflows/bootstrap-script-gates.yml'
       - '.github/workflows/build-agent.yml'
       - '.github/workflows/build-msi.yml'
@@ -37,7 +38,6 @@ on:
       - '.github/workflows/deploy-mcp.yml'
       - '.github/workflows/deploy-web.yml'
       - '.github/workflows/indexnow-notify.yml'
-      - '.github/workflows/oidc-login-test.yml'
       - '.github/workflows/pester.yml'
       - '.github/workflows/publish-scripts.yml'
   pull_request:
@@ -60,6 +60,7 @@ on:
       # Every other workflow: none of them changes the C# or TypeScript CodeQL analyzes.
       # paths-ignore cannot negate, so they are listed one by one; codeql.yml itself and
       # .github/codeql/ stay out of the list. A new workflow file is opt-in — add it here too.
+      - '.github/workflows/action-pins.yml'
       - '.github/workflows/bootstrap-script-gates.yml'
       - '.github/workflows/build-agent.yml'
       - '.github/workflows/build-msi.yml'
@@ -69,7 +70,6 @@ on:
       - '.github/workflows/deploy-mcp.yml'
       - '.github/workflows/deploy-web.yml'
       - '.github/workflows/indexnow-notify.yml'
-      - '.github/workflows/oidc-login-test.yml'
       - '.github/workflows/pester.yml'
       - '.github/workflows/publish-scripts.yml'
   schedule:
@@ -104,11 +104,11 @@ jobs:
             build-mode: none
 
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
 
-      - uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6
+      - uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6.0.0
         if: matrix.language == 'csharp'
         with:
           dotnet-version: '10.0.x'

.github/workflows/combine-rules.yml

@@ -1,7 +1,7 @@
 name: Validate & Combine Rules
 on:
   push:
-    branches: [main, dev]
+    branches: [main]
     paths:
       - 'rules/gather/**'
       - 'rules/analyze/**'
@@ -9,6 +9,7 @@ on:
       - 'rules/schema/**'
       - 'rules/scripts/**'
       - 'rules/guardrails.json'
+      - '.github/workflows/combine-rules.yml'
   pull_request:
     paths:
       - 'rules/gather/**'
@@ -17,73 +18,71 @@ on:
       - 'rules/schema/**'
       - 'rules/scripts/**'
       - 'rules/guardrails.json'
+      - '.github/workflows/combine-rules.yml'
+
+permissions:
+  contents: read
 
 jobs:
-  validate-and-combine:
+  # Pull requests and pushes alike; read-only, because the validator is third-party code.
+  validate:
     runs-on: ubuntu-latest
-    permissions:
-      contents: write
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
 
-      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7
+      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
           node-version: '22'
 
-      # Lockfile and no lifecycle scripts: this job holds contents:write and pushes to
-      # main, so an install-time script from a hijacked package would run with a token that
-      # can rewrite the repository. rules/scripts/package-lock.json pins ajv-cli, ajv-formats
-      # and every transitive package (Dependabot keeps it current); ajv is pure JS and
-      # needs no install hooks.
-      - name: Install ajv-cli from the lockfile
+      # Lockfile and no lifecycle scripts: rules/scripts/package-lock.json pins ajv,
+      # ajv-formats and every transitive package (Dependabot keeps it current); ajv is pure
+      # JS and needs no install hooks.
+      - name: Install the rules validator from the lockfile
         working-directory: rules/scripts
-        run: |
-          npm ci --ignore-scripts
-          echo "$PWD/node_modules/.bin" >> "$GITHUB_PATH"
+        run: npm ci --ignore-scripts
 
-      - name: Validate Gather Rules
-        run: |
-          for f in rules/gather/*.json; do
-            echo "Validating $f..."
-            ajv validate -s rules/schema/gather-rule.schema.json -d "$f" --spec=draft2020 -c ajv-formats
-          done
-
-      - name: Validate Analyze Rules
-        run: |
-          for f in rules/analyze/*.json; do
-            echo "Validating $f..."
-            ajv validate -s rules/schema/analyze-rule.schema.json -d "$f" --spec=draft2020 -c ajv-formats
-          done
-
-      - name: Validate IME Log Patterns
-        run: |
-          for f in rules/ime-log-patterns/*.json; do
-            echo "Validating $f..."
-            ajv validate -s rules/schema/ime-log-pattern.schema.json -d "$f" --spec=draft2020 -c ajv-formats
-          done
-
-      # guardrails.json values are baked verbatim into generated TypeScript that is
-      # auto-committed to main and shipped to the portal - the schema forbids control
-      # and line-terminator characters so a "data" PR can never become code.
-      - name: Validate Guardrails
-        run: ajv validate -s rules/schema/guardrails.schema.json -d rules/guardrails.json --spec=draft2020 -c ajv-formats
+      # Gather, analyze and IME log pattern files plus guardrails.json, each against its
+      # schema; the guardrails schema is what keeps a "data" PR from becoming code in the
+      # generated TypeScript (see validate.js).
+      - name: Validate rules and guardrails against their schemas
+        run: node rules/scripts/validate.js
 
       - name: Combine rules into dist/
         run: node rules/scripts/combine.js
 
-      # Plain git instead of a third-party action: this step runs with contents:write on
-      # main, so no code we do not control gets to push. Checkout leaves the job's
-      # GITHUB_TOKEN in the remote credential helper, which is all `git push` needs.
+  # The one job that can push to main, and it installs nothing: combine.js needs only node's
+  # built-ins, so no package code ever runs next to the write token. Keep it that way -- a
+  # dependency in combine.js would need its own job.
+  publish:
+    needs: validate
+    if: github.ref == 'refs/heads/main' && github.event_name == 'push'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      # Checkout leaves the job's GITHUB_TOKEN in the remote credential helper, which is all
+      # `git push` needs.
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+
+      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
+        with:
+          node-version: '22'
+
+      - name: Combine rules into dist/
+        run: node rules/scripts/combine.js
+
+      # Plain git instead of a third-party action, so no code we do not control gets to push.
       # NOTE: combine.js writes THREE outputs; committing only dist/ would silently discard
       # the two generated TS modules and leave the guardrails-in-sync CI check red.
       - name: Commit generated outputs
-        if: github.ref == 'refs/heads/main' && github.event_name == 'push'
         run: |
           set -euo pipefail
           git config user.name "github-actions[bot]"
           git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
           git add -- rules/dist/ \
-            src/Web/autopilot-monitor-web/utils/guardrails.generated.ts \
+            src/Web/autopilot-monitor-web/lib/generated/guardrails.generated.ts \
             src/McpServer/autopilot-monitor-mcp/src/rule-authoring.generated.ts
           if git diff --cached --quiet; then
             echo "Generated outputs unchanged - nothing to commit"

.github/workflows/deploy-backend.yml

@@ -3,26 +3,41 @@ name: Deploy Backend (Azure Functions)
 on:
   workflow_dispatch:
 
+# Every job states its own permissions. This default is what the build job runs with: restore
+# and build execute third-party code (NuGet MSBuild targets, the Functions worker SDK) and must
+# never hold more than a read-only token.
 permissions:
-  id-token: write   # OIDC federated login (secret-less)
   contents: read
 
+# Hosts (API, versions container) come from .github/scripts/Get-Endpoints.ps1.
 env:
   FUNCTION_APP: autopilotmonitor-api-eu
-  HEALTH_URL: https://autopilotmonitor-api-eu.azurewebsites.net/api/health
-  VERSIONS_CONTAINER: https://autopilotmonitoreu.blob.core.windows.net/versions
   CSPROJ_PATH: src/Backend/AutopilotMonitor.Functions/AutopilotMonitor.Functions.csproj
 
 jobs:
-  build-and-deploy:
+  # Runs only this repository's scripts. The deploy identity trusts the `production`
+  # environment, which admits main only.
+  reserve:
+    name: Reserve build number
     runs-on: ubuntu-latest
-    name: Build and Deploy Backend
+    environment: production
+    permissions:
+      contents: read
+      id-token: write   # OIDC federated login (secret-less)
+    outputs:
+      build_number: ${{ steps.version.outputs.build_number }}
+      version: ${{ steps.version.outputs.version }}
+      build_utc: ${{ steps.version.outputs.build_utc }}
 
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
 
+      - name: Load endpoints
+        shell: pwsh
+        run: ./.github/scripts/Get-Endpoints.ps1 -ExportToGitHubEnv
+
       - name: Login to Azure (OIDC)
         uses: azure/login@a641126d1b8aa4d1fa005f4f92df94a3a4c4c906 # v3.1.0
         with:
@@ -30,11 +45,6 @@ jobs:
           tenant-id: ${{ secrets.AZURE_TENANT_ID }}
           subscription-id: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
 
-      - name: Setup .NET 10
-        uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6
-        with:
-          dotnet-version: '10.0.x'
-
       # Same counter mechanism as the agent line: reserve-before-build with ETag-CAS
       # against a per-component counter blob. BuildTimestampUtc is pinned here rather
       # than left to MSBuild's default so the published manifest and the value baked
@@ -43,7 +53,7 @@ jobs:
         id: version
         shell: pwsh
         run: |
-          $buildNumber = & ./.github/scripts/Request-BuildNumber.ps1 -CounterUrl "${{ env.VERSIONS_CONTAINER }}/backend.txt"
+          $buildNumber = & ./.github/scripts/Request-BuildNumber.ps1 -CounterUrl "$env:VERSIONS_CONTAINER_URL/backend.txt"
 
           $csproj = Get-Content ${{ env.CSPROJ_PATH }} -Raw
           if ($csproj -notmatch '<VersionPrefix>(\d+\.\d+)</VersionPrefix>') {
@@ -57,20 +67,90 @@ jobs:
           "version=$version" >> $env:GITHUB_OUTPUT
           "build_utc=$buildUtc" >> $env:GITHUB_OUTPUT
 
+  # Build zone: no login, no secret, no id-token. Its only output is the artifact; the
+  # deploy job treats that as data and never builds.
+  build:
+    name: Build
+    needs: reserve
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      - name: Setup .NET 10
+        uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6.0.0
+        with:
+          dotnet-version: '10.0.x'
+
       - name: Restore dependencies
         run: dotnet restore ${{ env.CSPROJ_PATH }}
 
       - name: Build
-        run: dotnet build ${{ env.CSPROJ_PATH }} --configuration Release --no-restore -p:SourceRevisionId=${{ github.sha }} -p:BuildNumber=${{ steps.version.outputs.build_number }} -p:BuildTimestampUtc=${{ steps.version.outputs.build_utc }}
+        run: dotnet build ${{ env.CSPROJ_PATH }} --configuration Release --no-restore -p:SourceRevisionId=${{ github.sha }} -p:BuildNumber=${{ needs.reserve.outputs.build_number }} -p:BuildTimestampUtc=${{ needs.reserve.outputs.build_utc }}
 
       - name: Publish
-        run: dotnet publish ${{ env.CSPROJ_PATH }} --configuration Release --output ./publish --no-build -p:SourceRevisionId=${{ github.sha }} -p:BuildNumber=${{ steps.version.outputs.build_number }} -p:BuildTimestampUtc=${{ steps.version.outputs.build_utc }}
+        run: dotnet publish ${{ env.CSPROJ_PATH }} --configuration Release --output ./publish --no-build -p:SourceRevisionId=${{ github.sha }} -p:BuildNumber=${{ needs.reserve.outputs.build_number }} -p:BuildTimestampUtc=${{ needs.reserve.outputs.build_utc }}
+
+      # One archive, not a folder upload: upload-artifact skips hidden files, and the
+      # isolated worker cannot start without the publish output's .azurefunctions/ folder.
+      - name: Package publish output
+        run: tar -czf "$RUNNER_TEMP/backend-publish.tgz" -C publish .
+
+      - name: Upload publish output
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: backend-publish
+          path: ${{ runner.temp }}/backend-publish.tgz
+          if-no-files-found: error
+          retention-days: 1
+
+  # Trust zone: only this repository's scripts and pinned actions run here, never a restore
+  # or build. The package is unpacked outside the checkout, so nothing in it can replace the
+  # scripts this job runs.
+  deploy:
+    name: Deploy and verify
+    needs: [reserve, build]
+    runs-on: ubuntu-latest
+    environment: production
+    permissions:
+      contents: read
+      id-token: write   # OIDC federated login (secret-less)
+
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      - name: Load endpoints
+        shell: pwsh
+        run: ./.github/scripts/Get-Endpoints.ps1 -ExportToGitHubEnv
+
+      - name: Download publish output
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          name: backend-publish
+          path: ${{ runner.temp }}/backend-artifact
+
+      # GNU tar refuses members with '..' and strips leading '/'.
+      - name: Unpack publish output
+        run: |
+          mkdir "$RUNNER_TEMP/publish"
+          tar -xzf "$RUNNER_TEMP/backend-artifact/backend-publish.tgz" -C "$RUNNER_TEMP/publish"
+
+      - name: Login to Azure (OIDC)
+        uses: azure/login@a641126d1b8aa4d1fa005f4f92df94a3a4c4c906 # v3.1.0
+        with:
+          client-id: ${{ secrets.AZURE_CLIENT_ID }}
+          tenant-id: ${{ secrets.AZURE_TENANT_ID }}
+          subscription-id: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
 
       - name: Deploy to Azure Functions
-        uses: Azure/functions-action@c5060b3b8bb1ebbcb531abd00c822ecbaa8ea656 # v1
+        uses: Azure/functions-action@c5060b3b8bb1ebbcb531abd00c822ecbaa8ea656 # v1.5.7
         with:
           app-name: ${{ env.FUNCTION_APP }}
-          package: ./publish
+          package: ${{ runner.temp }}/publish
 
       # A green deploy step only means the package was accepted. This gate makes the
       # workflow assert what is actually being served, so the manifest published below
@@ -78,16 +158,18 @@ jobs:
       # /api/health is IP rate-limited at 30/min; one poll per 10s stays well under.
       - name: Verify deployed build is live
         shell: pwsh
+        env:
+          EXPECTED_VERSION: ${{ needs.reserve.outputs.version }}
         run: |
           $expectedCommit = '${{ github.sha }}'.Substring(0, 7)
-          $expectedVersion = '${{ steps.version.outputs.version }}'
+          $expectedVersion = $env:EXPECTED_VERSION
           $deadline = [DateTime]::UtcNow.AddMinutes(3)
           $attempt = 0
 
           while ([DateTime]::UtcNow -lt $deadline) {
             $attempt++
             try {
-              $health = Invoke-RestMethod -Uri '${{ env.HEALTH_URL }}' -Method Get -TimeoutSec 30
+              $health = Invoke-RestMethod -Uri "$env:API_BASE_URL/api/health" -Method Get -TimeoutSec 30
               if ($health.commitHash -eq $expectedCommit -and $health.version -eq $expectedVersion) {
                 Write-Host "Live after $attempt attempt(s): $($health.version) @ $($health.commitHash), built $($health.buildUtc)"
                 exit 0
@@ -107,18 +189,21 @@ jobs:
       # (rollback, stale instance) rather than a half-finished pipeline.
       - name: Publish version manifest
         shell: pwsh
+        env:
+          BACKEND_VERSION: ${{ needs.reserve.outputs.version }}
+          BACKEND_BUILD_UTC: ${{ needs.reserve.outputs.build_utc }}
         run: |
           $manifest = [ordered]@{
             component   = 'backend'
-            version     = '${{ steps.version.outputs.version }}'
+            version     = $env:BACKEND_VERSION
             commit      = '${{ github.sha }}'.Substring(0, 7)
-            buildUtc    = '${{ steps.version.outputs.build_utc }}'
+            buildUtc    = $env:BACKEND_BUILD_UTC
             deployedUtc = [DateTime]::UtcNow.ToString('o')
             runId       = '${{ github.run_id }}'
           } | ConvertTo-Json
 
           $authHeaders = & ./.github/scripts/Get-StorageAuthHeaders.ps1
-          $url = "${{ env.VERSIONS_CONTAINER }}/backend.json"
+          $url = "$env:VERSIONS_CONTAINER_URL/backend.json"
           # no-cache: rotating pointer, must never be served stale by any fronting cache.
           Invoke-RestMethod -Uri $url -Method Put -Headers ($authHeaders + @{ 'x-ms-blob-type' = 'BlockBlob'; 'x-ms-blob-cache-control' = 'no-cache' }) -Body $manifest -ContentType 'application/json' | Out-Null
           Write-Host "Published versions/backend.json"

.github/workflows/deploy-mcp.yml

@@ -16,20 +16,29 @@ env:
   # reference — with a sha-only tag `az containerapp update` saw the same image
   # and silently created no revision (2026-08-28).
   IMAGE_TAG: ${{ github.sha }}-${{ github.run_number }}
-  HEALTH_URL: https://mcp.autopilotmonitor.com/health
-  VERSIONS_CONTAINER: https://autopilotmonitoreu.blob.core.windows.net/versions
   PACKAGE_JSON: src/McpServer/autopilot-monitor-mcp/package.json
+  # Hosts (MCP, versions container) come from .github/scripts/Get-Endpoints.ps1.
 
 jobs:
+  # One job on purpose, unlike the other deploys: all third-party code (npm ci, the build, the
+  # embedding precompute) runs inside `docker build`, whose containers see neither the az
+  # login nor the registry credentials nor this job's OIDC request token. That container is
+  # the boundary -- never move npm onto the runner here, or the build gets the job's
+  # credentials. The deploy identity trusts the `production` environment, which admits main only.
   build-and-deploy:
     runs-on: ubuntu-latest
     name: Build and Deploy MCP Server
+    environment: production
 
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
 
+      - name: Load endpoints
+        shell: pwsh
+        run: ./.github/scripts/Get-Endpoints.ps1 -ExportToGitHubEnv
+
       # The published customer documentation lives in its own PUBLIC repo and is
       # baked into the image as the search_docs corpus (see the Dockerfile). No
       # token is needed. Checking it out here rather than vendoring it keeps the
@@ -38,7 +47,7 @@ jobs:
       # re-run actually rolls a new revision). /health reports the SHA captured
       # below so that staleness is checkable.
       - name: Check out documentation bundle
-        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
           repository: autopilotmonitor/autopilotmonitor-docs
@@ -62,7 +71,7 @@ jobs:
         id: version
         shell: pwsh
         run: |
-          $buildNumber = & ./.github/scripts/Request-BuildNumber.ps1 -CounterUrl "${{ env.VERSIONS_CONTAINER }}/mcp.txt"
+          $buildNumber = & ./.github/scripts/Request-BuildNumber.ps1 -CounterUrl "$env:VERSIONS_CONTAINER_URL/mcp.txt"
 
           $pkgVersion = (Get-Content ${{ env.PACKAGE_JSON }} -Raw | ConvertFrom-Json).version
           $prefix = ($pkgVersion -split '\.')[0..1] -join '.'
@@ -117,7 +126,7 @@ jobs:
           while ([DateTime]::UtcNow -lt $deadline) {
             $attempt++
             try {
-              $health = Invoke-RestMethod -Uri '${{ env.HEALTH_URL }}' -Method Get -TimeoutSec 60
+              $health = Invoke-RestMethod -Uri "$env:MCP_BASE_URL/health" -Method Get -TimeoutSec 60
               if ($health.commit -eq $expectedCommit -and $health.version -eq $expectedVersion) {
                 Write-Host "Live after $attempt attempt(s): $($health.version) @ $($health.commit), docs $($health.docs.commit) ($($health.docs.chunks) chunks)"
                 exit 0
@@ -148,7 +157,7 @@ jobs:
           } | ConvertTo-Json
 
           $authHeaders = & ./.github/scripts/Get-StorageAuthHeaders.ps1
-          $url = "${{ env.VERSIONS_CONTAINER }}/mcp.json"
+          $url = "$env:VERSIONS_CONTAINER_URL/mcp.json"
           # no-cache: rotating pointer, must never be served stale by any fronting cache.
           Invoke-RestMethod -Uri $url -Method Put -Headers ($authHeaders + @{ 'x-ms-blob-type' = 'BlockBlob'; 'x-ms-blob-cache-control' = 'no-cache' }) -Body $manifest -ContentType 'application/json' | Out-Null
           Write-Host "Published versions/mcp.json"

.github/workflows/deploy-web.yml

@@ -5,6 +5,11 @@ name: Deploy Web (Static Web App)
 # path ci.yml tests (setup-node 22 + npm ci + next build) instead of Oryx guessing inside the
 # action's container, and the exported site is attested like the agent ZIP and the MSI.
 #
+# Three jobs, each holding only what it needs: build runs all third-party code without any
+# credential, deploy holds the SWA token alone, record attests, verifies and writes the
+# manifest. A failed record job is re-run on its own; it writes only once the live site
+# serves this commit.
+#
 # PR preview environments were dropped with the action: their per-PR URLs are never
 # registered as redirect URIs, so nobody could log in on them anyway.
 
@@ -17,38 +22,39 @@ on:
       - '.github/workflows/deploy-web.yml'
   workflow_dispatch:
 
+# Every job states its own permissions. This default is what the build job runs with: npm ci
+# (install scripts included) and next build execute third-party code and must never hold more
+# than a read-only token.
 permissions:
   contents: read
-  id-token: write      # keyless Sigstore signing (artifact attestation)
-  attestations: write  # store the provenance attestation
 
+# Hosts (API, portal, storage) come from .github/scripts/Get-Endpoints.ps1, never from a
+# repository variable.
 env:
-  PORTAL_VERSION_URL: https://portal.autopilotmonitor.com/version.json
-  VERSIONS_CONTAINER: https://autopilotmonitoreu.blob.core.windows.net/versions
   WEB_DIR: src/Web/autopilot-monitor-web
   # Exact version: `npx --package` resolves from the registry at run time, so the pin is the
   # only thing that keeps the deploy step's code fixed. Bump deliberately.
   SWA_CLI_VERSION: 2.0.10
 
 jobs:
-  build_and_deploy_job:
+  # Build zone: no login, no id-token. The one secret here is the Application Insights
+  # connection string, which ships inside the public bundle anyway.
+  build:
+    name: Build
     runs-on: ubuntu-latest
-    name: Build and Deploy Job
+    outputs:
+      docs_sha: ${{ steps.docs.outputs.sha }}
+
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
           lfs: false
           fetch-depth: 0  # Full history needed for git-based sitemap lastmod dates
 
-      # Only the version manifest at the very end needs Azure; logging in here rather than
-      # next to that step keeps a credential problem from surfacing after a live deploy.
-      - name: Login to Azure (OIDC)
-        uses: azure/login@a641126d1b8aa4d1fa005f4f92df94a3a4c4c906 # v3.1.0
-        with:
-          client-id: ${{ secrets.AZURE_CLIENT_ID }}
-          tenant-id: ${{ secrets.AZURE_TENANT_ID }}
-          subscription-id: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
+      - name: Load endpoints
+        shell: pwsh
+        run: ./.github/scripts/Get-Endpoints.ps1 -ExportToGitHubEnv
 
       # The customer docs repo is the single source of the "What's new" panel: the prebuild
       # step (scripts/whats-new/build-whats-new.js) turns changelog/*.md into
@@ -57,7 +63,7 @@ jobs:
       # workflow runs again (push under src/Web/** or a manual dispatch); versions/web.json
       # records which docs commit is live.
       - name: Check out documentation bundle
-        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
           repository: autopilotmonitor/autopilotmonitor-docs
@@ -68,7 +74,7 @@ jobs:
         id: docs
         run: echo "sha=$(git -C whats-new-docs rev-parse HEAD)" >> "$GITHUB_OUTPUT"
 
-      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7
+      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
           node-version: '22'
           cache: npm
@@ -105,12 +111,6 @@ jobs:
           # and the default app for browsers without a stored selection (legacy|primary).
           NEXT_PUBLIC_ENTRA_LEGACY_CLIENT_ID: ${{ vars.NEXT_PUBLIC_ENTRA_LEGACY_CLIENT_ID }}
           NEXT_PUBLIC_ENTRA_DEFAULT_APP: ${{ vars.NEXT_PUBLIC_ENTRA_DEFAULT_APP }}
-          NEXT_PUBLIC_ENTRA_REDIRECT_URI: ${{ vars.NEXT_PUBLIC_ENTRA_REDIRECT_URI }}
-          NEXT_PUBLIC_ENTRA_POST_LOGOUT_REDIRECT_URI: ${{ vars.NEXT_PUBLIC_ENTRA_POST_LOGOUT_REDIRECT_URI }}
-          NEXT_PUBLIC_API_BASE_URL: ${{ vars.NEXT_PUBLIC_API_BASE_URL }}
-          # Browsers load the live stats through it, and the build reads it once to bake the
-          # numbers of this moment into the landing page's static HTML (lib/platformStats.ts).
-          NEXT_PUBLIC_PLATFORM_STATS_MANIFEST_URL: ${{ vars.NEXT_PUBLIC_PLATFORM_STATS_MANIFEST_URL }}
           NEXT_PUBLIC_APPINSIGHTS_CONNECTION_STRING: ${{ secrets.NEXT_PUBLIC_APPINSIGHTS_CONNECTION_STRING }}
           # Build stamp for public/version.json (scripts/generate-version.js in prebuild);
           # the verify step below polls the deployed file for exactly this commit.
@@ -120,6 +120,18 @@ jobs:
           # Star counter from the step above; empty when the lookup failed.
           NEXT_PUBLIC_GITHUB_STARS: ${{ steps.stars.outputs.count }}
         run: |
+          # All from the endpoint registry (Load endpoints). Empty, the portal would silently call
+          # localhost:7071. The stats manifest is what browsers load the live numbers from, and the
+          # build reads it once to bake the numbers of this moment into the landing page's static
+          # HTML (lib/platformStats.ts). The redirect URIs are only the fallback for the static
+          # render; in the browser lib/msalConfig.ts uses window.location.origin.
+          export NEXT_PUBLIC_API_BASE_URL="$API_BASE_URL"
+          export NEXT_PUBLIC_PLATFORM_STATS_MANIFEST_URL="$STATS_CONTAINER_URL"
+          export NEXT_PUBLIC_ENTRA_REDIRECT_URI="$WWW_BASE_URL"
+          export NEXT_PUBLIC_ENTRA_POST_LOGOUT_REDIRECT_URI="$WWW_BASE_URL"
+          test -n "$NEXT_PUBLIC_API_BASE_URL" || { echo "::error::API_BASE_URL is empty - the portal would call localhost"; exit 1; }
+          test -n "$NEXT_PUBLIC_PLATFORM_STATS_MANIFEST_URL" || { echo "::error::STATS_CONTAINER_URL is empty"; exit 1; }
+          test -n "$NEXT_PUBLIC_ENTRA_REDIRECT_URI" || { echo "::error::WWW_BASE_URL is empty"; exit 1; }
           npm run build
           test -f out/version.json || { echo "out/version.json missing - export did not run"; exit 1; }
           test -f out/whats-new.json || { echo "out/whats-new.json missing - whats-new prebuild did not run"; exit 1; }
@@ -136,19 +148,37 @@ jobs:
           echo "archive=$archive" >> "$GITHUB_OUTPUT"
           sha256sum "$archive"
 
-      # Sigstore keyless provenance: binds the export digest to this workflow run (repo, ref,
-      # commit, workflow file) in a public transparency log.
-      # Verify: gh attestation verify portal-<sha>.tar.gz --repo okieselbach/AutopilotMonitor
-      - name: Attest build provenance (portal export)
-        uses: actions/attest-build-provenance@4d101475d8b20a2381f78447822ac1eab6504dd8 # v4
-        with:
-          subject-path: ${{ steps.package.outputs.archive }}
-
       - name: Upload build artifact
-        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           name: portal-${{ github.sha }}
           path: ${{ steps.package.outputs.archive }}
+          if-no-files-found: error
+
+  # Holds the SWA deployment token and nothing else -- deliberately no id-token: the SWA CLI
+  # is third-party npm code whose dependencies resolve at run time.
+  deploy:
+    name: Deploy to Static Web App
+    needs: build
+    runs-on: ubuntu-latest
+    environment: production
+
+    steps:
+      # For staticwebapp.config.json only.
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      - name: Download build artifact
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          name: portal-${{ github.sha }}
+          path: ${{ runner.temp }}/portal
+
+      - name: Unpack export
+        run: |
+          mkdir "$WEB_DIR/out"
+          tar -xzf "$RUNNER_TEMP/portal/portal-${GITHUB_SHA::7}.tar.gz" -C "$WEB_DIR/out"
 
       # Upload only -- out/ is already built. --swa-config-location points at the app root,
       # where staticwebapp.config.json lives (next export does not copy it into out/).
@@ -163,6 +193,48 @@ jobs:
             --env production \
             --no-use-keychain
 
+  # Trust zone: only this repository's scripts and pinned actions run here. The deploy
+  # identity trusts the `production` environment, which admits main only.
+  record:
+    name: Attest, verify and record
+    needs: [build, deploy]
+    runs-on: ubuntu-latest
+    environment: production
+    permissions:
+      contents: read
+      id-token: write      # keyless Sigstore signing, OIDC login for the manifest
+      attestations: write  # store the provenance attestation
+
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      - name: Load endpoints
+        shell: pwsh
+        run: ./.github/scripts/Get-Endpoints.ps1 -ExportToGitHubEnv
+
+      - name: Download build artifact
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          name: portal-${{ github.sha }}
+          path: ${{ runner.temp }}/portal
+
+      - name: Locate the export archive
+        id: archive
+        run: |
+          path="$RUNNER_TEMP/portal/portal-${GITHUB_SHA::7}.tar.gz"
+          test -f "$path" || { echo "::error::Export archive for this commit is missing"; exit 1; }
+          echo "path=$path" >> "$GITHUB_OUTPUT"
+
+      # Sigstore keyless provenance: binds the export digest to this workflow run (repo, ref,
+      # commit, workflow file) in a public transparency log.
+      # Verify: gh attestation verify portal-<sha>.tar.gz --repo okieselbach/AutopilotMonitor
+      - name: Attest build provenance (portal export)
+        uses: actions/attest-build-provenance@4d101475d8b20a2381f78447822ac1eab6504dd8 # v4.2.2
+        with:
+          subject-path: ${{ steps.archive.outputs.path }}
+
       # The CLI reporting success proves the upload, not that the production host serves the
       # new build -- verify against the live /version.json (Cache-Control: no-store via
       # staticwebapp.config.json) before publishing the version manifest.
@@ -176,7 +248,7 @@ jobs:
           while ([DateTime]::UtcNow -lt $deadline) {
             $attempt++
             try {
-              $v = Invoke-RestMethod -Uri '${{ env.PORTAL_VERSION_URL }}' -Method Get -TimeoutSec 30 -Headers @{ 'Cache-Control' = 'no-cache' }
+              $v = Invoke-RestMethod -Uri "$env:PORTAL_BASE_URL/version.json" -Method Get -TimeoutSec 30 -Headers @{ 'Cache-Control' = 'no-cache' }
               if ($v.commit -eq $expectedCommit) {
                 Write-Host "Live after $attempt attempt(s): web @ $($v.commit), built $($v.buildUtc)"
                 exit 0
@@ -190,22 +262,36 @@ jobs:
 
           throw "Portal did not serve commit $expectedCommit within 5 minutes -- deployment not verified, version manifest NOT published"
 
+      - name: Login to Azure (OIDC)
+        uses: azure/login@a641126d1b8aa4d1fa005f4f92df94a3a4c4c906 # v3.1.0
+        with:
+          client-id: ${{ secrets.AZURE_CLIENT_ID }}
+          tenant-id: ${{ secrets.AZURE_TENANT_ID }}
+          subscription-id: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
+
       # Cross-component deploy record, written last and only on a verified deploy --
       # same contract as versions/backend.json and versions/mcp.json. docsCommit says which
       # docs revision the live What's new panel was generated from (as for the MCP corpus).
+      # The docs commit comes from the build job, so it arrives as data and is checked
+      # against the shape of a commit id before it is used.
       - name: Publish version manifest
         shell: pwsh
+        env:
+          DOCS_SHA: ${{ needs.build.outputs.docs_sha }}
         run: |
+          if ($env:DOCS_SHA -notmatch '^[0-9a-f]{40}$') {
+            throw "The build job handed over no valid docs commit -- version manifest NOT published."
+          }
           $manifest = [ordered]@{
             component   = 'web'
             commit      = '${{ github.sha }}'.Substring(0, 7)
             deployedUtc = [DateTime]::UtcNow.ToString('o')
             runId       = '${{ github.run_id }}'
-            docsCommit  = '${{ steps.docs.outputs.sha }}'.Substring(0, 7)
+            docsCommit  = $env:DOCS_SHA.Substring(0, 7)
           } | ConvertTo-Json
 
           $authHeaders = & ./.github/scripts/Get-StorageAuthHeaders.ps1
-          $url = "${{ env.VERSIONS_CONTAINER }}/web.json"
+          $url = "$env:VERSIONS_CONTAINER_URL/web.json"
           # no-cache: rotating pointer, must never be served stale by any fronting cache.
           Invoke-RestMethod -Uri $url -Method Put -Headers ($authHeaders + @{ 'x-ms-blob-type' = 'BlockBlob'; 'x-ms-blob-cache-control' = 'no-cache' }) -Body $manifest -ContentType 'application/json' | Out-Null
           Write-Host "Published versions/web.json"

.github/workflows/indexnow-notify.yml

@@ -3,24 +3,34 @@ name: IndexNow Notify (Bing/Yandex)
 on:
   workflow_dispatch:
 
-# The job only talks to public endpoints; it never needs a repository token.
-permissions: {}
+# Read-only, for the checkout of the endpoint registry; beyond that the job only talks to
+# public endpoints.
+permissions:
+  contents: read
 
 jobs:
   notify:
     runs-on: ubuntu-latest
     name: Submit URLs to IndexNow
     steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      - name: Load endpoints
+        shell: pwsh
+        run: ./.github/scripts/Get-Endpoints.ps1 -ExportToGitHubEnv
+
       - name: Notify IndexNow
         run: |
-          URLS=$(curl -s https://www.autopilotmonitor.com/sitemap.xml | grep -oP '<loc>\K[^<]+')
+          URLS=$(curl -s "$WWW_BASE_URL/sitemap.xml" | grep -oP '<loc>\K[^<]+')
           URL_JSON=$(echo "$URLS" | jq -R -s 'split("\n") | map(select(length > 0))')
           RESPONSE=$(curl -s -o /dev/null -w "%{http_code}" -X POST "https://api.indexnow.org/indexnow" \
             -H "Content-Type: application/json" \
             -d "{
-              \"host\": \"www.autopilotmonitor.com\",
+              \"host\": \"${WWW_BASE_URL#https://}\",
               \"key\": \"8f1710b5-f14b-477e-938b-6c01ef851661\",
-              \"keyLocation\": \"https://www.autopilotmonitor.com/IndexNow.txt\",
+              \"keyLocation\": \"$WWW_BASE_URL/IndexNow.txt\",
               \"urlList\": $URL_JSON
             }")
           echo "IndexNow response: HTTP $RESPONSE"

.github/workflows/oidc-login-test.yml

@@ -1,28 +0,0 @@
-# TEMPORARY: proves the secret-less OIDC federated login works end-to-end.
-# Delete after the cross-tenant migration is verified (or keep as a cheap smoke test).
-name: OIDC Login Test
-
-on:
-  workflow_dispatch:
-
-permissions:
-  id-token: write
-  contents: read
-
-jobs:
-  login-test:
-    runs-on: ubuntu-latest
-    name: Federated login + read check
-    steps:
-      - name: Login to Azure (OIDC)
-        uses: azure/login@a641126d1b8aa4d1fa005f4f92df94a3a4c4c906 # v3.1.0
-        with:
-          client-id: ${{ secrets.AZURE_CLIENT_ID }}
-          tenant-id: ${{ secrets.AZURE_TENANT_ID }}
-          subscription-id: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
-
-      - name: Prove identity and RBAC scope
-        run: |
-          az account show --query "{subscription:name, subscriptionId:id, tenantId:tenantId, user:user.name}" -o json
-          echo "--- function app visible with Contributor scope? ---"
-          az functionapp list --query "[].name" -o json

.github/workflows/publish-scripts.yml

@@ -36,13 +36,13 @@ concurrency:
 
 # Authenticode for the customer scripts. Same identity and same repository variables as
 # build-agent.yml -- the loader on every device pins this publisher, so the two must not
-# drift apart.
+# drift apart. The publisher takes every host, the timestamp server included, from
+# .github/scripts/Get-Endpoints.ps1.
 env:
   CODE_SIGN_CLIENT_ID: ${{ vars.CODE_SIGN_CLIENT_ID }}
   CODE_SIGN_CERTIFICATE_NAME: ${{ vars.CODE_SIGN_CERTIFICATE_NAME }}
   CODE_SIGN_KEY_VAULT_URL: ${{ vars.CODE_SIGN_KEY_VAULT_URL }}
   CODE_SIGN_EXPECTED_SUBJECT: ${{ vars.CODE_SIGN_EXPECTED_SUBJECT }}
-  CODE_SIGN_TIMESTAMP_URL: http://timestamp.acs.microsoft.com
 
 jobs:
   # $/ is the self-repository form: this repository at the running commit, never a
@@ -60,7 +60,7 @@ jobs:
       contents: read
       id-token: write   # OIDC federated login for the storage writes (secret-less)
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
 
@@ -124,7 +124,6 @@ jobs:
             -SigningToken $env:CODE_SIGN_AKV_ACCESS_TOKEN `
             -KeyVaultUrl $env:CODE_SIGN_KEY_VAULT_URL `
             -CertificateName $env:CODE_SIGN_CERTIFICATE_NAME `
-            -TimestampUrl $env:CODE_SIGN_TIMESTAMP_URL `
             -ExpectedPublisher $env:CODE_SIGN_EXPECTED_SUBJECT `
             -SignedOutputDir "$env:RUNNER_TEMP/signed-scripts" `
             -DryRun:$dryRun
@@ -135,7 +134,7 @@ jobs:
       # when someone wants to look at the file.
       - name: Upload signed scripts
         if: always()
-        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           name: signed-scripts
           path: ${{ runner.temp }}/signed-scripts

AutopilotMonitor.sln

@@ -31,6 +31,12 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AutopilotMonitor.Agent.V2.C
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AutopilotMonitor.SummaryDialog.Tests", "src\Agent\AutopilotMonitor.SummaryDialog.Tests\AutopilotMonitor.SummaryDialog.Tests.csproj", "{4F1234C1-9387-4D2C-93E0-713698A2DFCB}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Push", "Push", "{09266D87-DDB8-2F61-A22F-10D1DD295F4F}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AutopilotMonitor.Push", "src\Push\AutopilotMonitor.Push\AutopilotMonitor.Push.csproj", "{2C3E71E4-0049-45A5-839D-F4171B47D5F3}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AutopilotMonitor.Push.Tests", "src\Push\AutopilotMonitor.Push.Tests\AutopilotMonitor.Push.Tests.csproj", "{6BB95C52-F9D5-4C48-A107-B2B1FD5EE302}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -161,6 +167,30 @@ Global
 		{4F1234C1-9387-4D2C-93E0-713698A2DFCB}.Release|x64.Build.0 = Release|Any CPU
 		{4F1234C1-9387-4D2C-93E0-713698A2DFCB}.Release|x86.ActiveCfg = Release|Any CPU
 		{4F1234C1-9387-4D2C-93E0-713698A2DFCB}.Release|x86.Build.0 = Release|Any CPU
+		{2C3E71E4-0049-45A5-839D-F4171B47D5F3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{2C3E71E4-0049-45A5-839D-F4171B47D5F3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{2C3E71E4-0049-45A5-839D-F4171B47D5F3}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{2C3E71E4-0049-45A5-839D-F4171B47D5F3}.Debug|x64.Build.0 = Debug|Any CPU
+		{2C3E71E4-0049-45A5-839D-F4171B47D5F3}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{2C3E71E4-0049-45A5-839D-F4171B47D5F3}.Debug|x86.Build.0 = Debug|Any CPU
+		{2C3E71E4-0049-45A5-839D-F4171B47D5F3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{2C3E71E4-0049-45A5-839D-F4171B47D5F3}.Release|Any CPU.Build.0 = Release|Any CPU
+		{2C3E71E4-0049-45A5-839D-F4171B47D5F3}.Release|x64.ActiveCfg = Release|Any CPU
+		{2C3E71E4-0049-45A5-839D-F4171B47D5F3}.Release|x64.Build.0 = Release|Any CPU
+		{2C3E71E4-0049-45A5-839D-F4171B47D5F3}.Release|x86.ActiveCfg = Release|Any CPU
+		{2C3E71E4-0049-45A5-839D-F4171B47D5F3}.Release|x86.Build.0 = Release|Any CPU
+		{6BB95C52-F9D5-4C48-A107-B2B1FD5EE302}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6BB95C52-F9D5-4C48-A107-B2B1FD5EE302}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6BB95C52-F9D5-4C48-A107-B2B1FD5EE302}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{6BB95C52-F9D5-4C48-A107-B2B1FD5EE302}.Debug|x64.Build.0 = Debug|Any CPU
+		{6BB95C52-F9D5-4C48-A107-B2B1FD5EE302}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{6BB95C52-F9D5-4C48-A107-B2B1FD5EE302}.Debug|x86.Build.0 = Debug|Any CPU
+		{6BB95C52-F9D5-4C48-A107-B2B1FD5EE302}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6BB95C52-F9D5-4C48-A107-B2B1FD5EE302}.Release|Any CPU.Build.0 = Release|Any CPU
+		{6BB95C52-F9D5-4C48-A107-B2B1FD5EE302}.Release|x64.ActiveCfg = Release|Any CPU
+		{6BB95C52-F9D5-4C48-A107-B2B1FD5EE302}.Release|x64.Build.0 = Release|Any CPU
+		{6BB95C52-F9D5-4C48-A107-B2B1FD5EE302}.Release|x86.ActiveCfg = Release|Any CPU
+		{6BB95C52-F9D5-4C48-A107-B2B1FD5EE302}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -179,5 +209,8 @@ Global
 		{11B36E5C-B512-4D1E-A76B-E5AD866B033C} = {096B6098-F141-7114-B090-72D1899D8853}
 		{95A09BF0-4E22-41D9-9B43-8D6ECC2C8AD0} = {096B6098-F141-7114-B090-72D1899D8853}
 		{4F1234C1-9387-4D2C-93E0-713698A2DFCB} = {096B6098-F141-7114-B090-72D1899D8853}
+		{09266D87-DDB8-2F61-A22F-10D1DD295F4F} = {827E0CD3-B72D-47B6-A68D-7590B98EB39B}
+		{2C3E71E4-0049-45A5-839D-F4171B47D5F3} = {09266D87-DDB8-2F61-A22F-10D1DD295F4F}
+		{6BB95C52-F9D5-4C48-A107-B2B1FD5EE302} = {09266D87-DDB8-2F61-A22F-10D1DD295F4F}
 	EndGlobalSection
 EndGlobal

Directory.Build.props

@@ -8,5 +8,8 @@
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <MSBuildTreatWarningsAsErrors>true</MSBuildTreatWarningsAsErrors>
     <WarningsNotAsErrors>NU1901;NU1902;NU1903;NU1904</WarningsNotAsErrors>
+    <!-- Run the IDE code-style analyzers in the build too, so the rules .editorconfig raises
+         to warning fail it like any compiler warning. -->
+    <EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>
   </PropertyGroup>
 </Project>

rules/analyze/ANALYZE-DEV-007.json

@@ -5,7 +5,7 @@
   "description": "The device's real-time clock deviates from NTP by more than two minutes. Microsoft documents that a clock off by several minutes causes TPM attestation errors (self-deploying/pre-provisioning) and ESP timeouts.",
   "severity": "warning",
   "category": "device",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "author": "Autopilot Monitor",
   "enabled": true,
   "evaluateOn": [
@@ -17,7 +17,7 @@
   "confidenceThreshold": 50,
   "conditions": [
     {
-      "signal": "clock_ahead",
+      "signal": "clock_behind",
       "source": "event_data",
       "eventType": "ntp_time_check",
       "dataField": "offsetSeconds",
@@ -26,7 +26,7 @@
       "required": false
     },
     {
-      "signal": "clock_behind",
+      "signal": "clock_ahead",
       "source": "event_data",
       "eventType": "ntp_time_check",
       "dataField": "offsetSeconds",

rules/analyze/ANALYZE-DEV-013.json

@@ -0,0 +1,118 @@
+{
+  "$schema": "../schema/analyze-rule.schema.json",
+  "ruleId": "ANALYZE-DEV-013",
+  "title": "OOBE Quality Update Failed",
+  "description": "Detects that the Windows quality update page at the end of OOBE (Enrollment Status Page setting \"Install Windows quality updates\") reported a failed download or install and recorded no successful install afterwards — the page's own failure names on the oobe_update_page events. Setup usually continues, so the failure is otherwise invisible: the device finishes OOBE without the monthly security update. An OS build change across a restart (os_build_changed) vetoes the finding, and so does the agent's names_capped marker — once the page's event names were capped, a missing success name proves nothing. A downloadInstallFailureHelper entry alone is no failure: updates that installed fine log it too.",
+  "severity": "warning",
+  "category": "device",
+  "version": "1.0.0",
+  "enabled": true,
+  "evaluateOn": [
+    "enrollment_end"
+  ],
+  "trigger": "single",
+  "baseConfidence": 75,
+  "confidenceThreshold": 60,
+  "conditions": [
+    {
+      "signal": "update_failure",
+      "source": "event_data",
+      "eventType": "oobe_update_page",
+      "dataField": "name",
+      "operator": "in",
+      "value": "SdxWebAppCloudNDUP_processStatusChangeFromHandler_downloadFailedError,SdxWebAppCloudNDUP_processStatusChangeFromHandler_installFailedError,ExpeditedUpdate_commitExpeditionDownloadInstallAsyncFailure",
+      "required": true
+    },
+    {
+      "signal": "no_install_success",
+      "source": "event_data",
+      "eventType": "oobe_update_page",
+      "dataField": "name",
+      "operator": "not_exists",
+      "value": "",
+      "filterField": "name",
+      "filterOperator": "regex",
+      "filterValue": "installSucceededRebootRequired|commitExpeditionDownloadInstallAsyncSucceeded",
+      "required": true
+    },
+    {
+      "signal": "os_build_unchanged",
+      "source": "event_type",
+      "eventType": "os_build_changed",
+      "operator": "not_exists",
+      "value": "",
+      "required": true
+    },
+    {
+      "signal": "page_names_complete",
+      "source": "event_data",
+      "eventType": "oobe_update_page",
+      "dataField": "cxhEvent",
+      "operator": "not_exists",
+      "value": "",
+      "filterField": "cxhEvent",
+      "filterOperator": "equals",
+      "filterValue": "names_capped",
+      "required": true
+    },
+    {
+      "signal": "update_page_failed",
+      "source": "event_data",
+      "eventType": "oobe_update_page",
+      "dataField": "result",
+      "operator": "equals",
+      "value": "fail",
+      "filterField": "page",
+      "filterOperator": "equals",
+      "filterValue": "OobeNDUP",
+      "required": false
+    },
+    {
+      "signal": "update_skipped",
+      "source": "event_data",
+      "eventType": "oobe_update_page",
+      "dataField": "name",
+      "operator": "regex",
+      "value": "SkipDownloadInstallButtonClicked$",
+      "required": false
+    }
+  ],
+  "confidenceFactors": [
+    {
+      "signal": "update_page_failed",
+      "condition": "exists",
+      "weight": 10
+    }
+  ],
+  "explanation": "The Windows quality update page at the end of OOBE reported `{{update_failure}}`, and no successful install was recorded afterwards. When the download or install of the update fails, the page gives up and setup continues, so the enrollment itself can still succeed — but the device most likely finished OOBE without the monthly security update and installs it only later, through the Windows Update policy that applies after enrollment. Selecting Skip on the page after the failure leads to the same result.",
+  "remediation": [
+    {
+      "title": "Find out why the update failed",
+      "steps": [
+        "Open the oobe_update_page events around the failure in the session timeline: the download progress before it shows how far the download got, and a Skip after it shows that someone chose to continue.",
+        "Check the network path the device uses during OOBE for Windows Update and Delivery Optimization: proxy, TLS inspection and firewall rules for the Windows Update endpoints.",
+        "Compare with other devices: the same failure on many devices of one site points at the network path, on one model at the device, and across the fleet at the update itself."
+      ]
+    },
+    {
+      "title": "Make sure the device gets the update",
+      "steps": [
+        "Verify the device's patch level after enrollment; the update ring assigned to the device installs the missing monthly security update on its normal schedule.",
+        "Where the OOBE quality update keeps failing for one network or device group, decide per Enrollment Status Page profile whether \"Install Windows quality updates\" should stay on."
+      ]
+    }
+  ],
+  "relatedDocs": [
+    {
+      "title": "Microsoft Learn: Install Windows quality updates during OOBE (Enrollment Status Page)",
+      "url": "https://learn.microsoft.com/en-us/intune/device-enrollment/windows/setup-status-page#windows-monthly-security-update-release-details"
+    }
+  ],
+  "markSessionAsFailedDefault": false,
+  "tags": [
+    "device",
+    "windows-update",
+    "oobe",
+    "quality-update"
+  ]
+}

rules/analyze/ANALYZE-DEV-014.json

@@ -0,0 +1,119 @@
+{
+  "$schema": "../schema/analyze-rule.schema.json",
+  "ruleId": "ANALYZE-DEV-014",
+  "title": "OOBE Quality Update Not Offered After an Earlier Failure",
+  "description": "Detects that the Windows quality update page at the end of OOBE found no update to install although the device is out of date, on a device whose update page counts an earlier failed download or install (oobe_update_page: NDUPDownloadInstallPreviousFailureCount above 0, osUpdatesWithNDUPPI false, getDaysOutOfDateSucceeded above 0). No failure and no install success are recorded in this session — a failure in this session is ANALYZE-DEV-013 — and the agent's names_capped marker vetoes the finding, because a missing name proves nothing once the page's names were capped. The device finishes OOBE without the monthly security update.",
+  "severity": "warning",
+  "category": "device",
+  "version": "1.0.0",
+  "enabled": true,
+  "evaluateOn": [
+    "enrollment_end"
+  ],
+  "trigger": "single",
+  "baseConfidence": 75,
+  "confidenceThreshold": 60,
+  "conditions": [
+    {
+      "signal": "previous_failures",
+      "source": "event_data",
+      "eventType": "oobe_update_page",
+      "dataField": "value",
+      "operator": "gt",
+      "value": "0",
+      "filterField": "name",
+      "filterOperator": "equals",
+      "filterValue": "SdxWebAppCloudNDUP_initialize_NDUPDownloadInstallPreviousFailureCount",
+      "required": true
+    },
+    {
+      "signal": "nothing_offered",
+      "source": "event_data",
+      "eventType": "oobe_update_page",
+      "dataField": "value",
+      "operator": "equals",
+      "value": "false",
+      "filterField": "name",
+      "filterOperator": "equals",
+      "filterValue": "SdxWebAppCloudNDUP_updateManager_processUpdatesMetadata_osUpdatesWithNDUPPI",
+      "required": true
+    },
+    {
+      "signal": "days_out_of_date",
+      "source": "event_data",
+      "eventType": "oobe_update_page",
+      "dataField": "value",
+      "operator": "gt",
+      "value": "0",
+      "filterField": "name",
+      "filterOperator": "equals",
+      "filterValue": "ExpeditedUpdate_getDaysOutOfDateSucceeded",
+      "required": true
+    },
+    {
+      "signal": "no_update_failure",
+      "source": "event_data",
+      "eventType": "oobe_update_page",
+      "dataField": "name",
+      "operator": "not_exists",
+      "value": "",
+      "filterField": "name",
+      "filterOperator": "in",
+      "filterValue": "SdxWebAppCloudNDUP_processStatusChangeFromHandler_downloadFailedError,SdxWebAppCloudNDUP_processStatusChangeFromHandler_installFailedError,ExpeditedUpdate_commitExpeditionDownloadInstallAsyncFailure",
+      "required": true
+    },
+    {
+      "signal": "no_install_success",
+      "source": "event_data",
+      "eventType": "oobe_update_page",
+      "dataField": "name",
+      "operator": "not_exists",
+      "value": "",
+      "filterField": "name",
+      "filterOperator": "regex",
+      "filterValue": "installSucceededRebootRequired|commitExpeditionDownloadInstallAsyncSucceeded",
+      "required": true
+    },
+    {
+      "signal": "page_names_complete",
+      "source": "event_data",
+      "eventType": "oobe_update_page",
+      "dataField": "cxhEvent",
+      "operator": "not_exists",
+      "value": "",
+      "filterField": "cxhEvent",
+      "filterOperator": "equals",
+      "filterValue": "names_capped",
+      "required": true
+    }
+  ],
+  "explanation": "The Windows quality update page at the end of OOBE checked for updates and found none to install, although Windows reports the device as {{days_out_of_date}} days out of date. The page's failure counter for this device stands at {{previous_failures}}: an earlier download or install of an OOBE quality update on this device failed. The device finished OOBE without the monthly security update and installs it only later, through the Windows Update policy that applies after enrollment.",
+  "remediation": [
+    {
+      "title": "Check the earlier attempt",
+      "steps": [
+        "Look at the device's earlier enrollment sessions — the failed attempt and its ANALYZE-DEV-013 finding are usually there.",
+        "Verify the device's patch level after enrollment; the update ring assigned to the device installs the missing monthly security update on its normal schedule."
+      ]
+    },
+    {
+      "title": "Reduce how far behind devices start",
+      "steps": [
+        "Devices that start OOBE many months behind need a long update during setup; a current OS image or factory build shortens it and gives a failed attempt less to repeat."
+      ]
+    }
+  ],
+  "relatedDocs": [
+    {
+      "title": "Microsoft Learn: Install Windows quality updates during OOBE (Enrollment Status Page)",
+      "url": "https://learn.microsoft.com/en-us/intune/device-enrollment/windows/setup-status-page#windows-monthly-security-update-release-details"
+    }
+  ],
+  "markSessionAsFailedDefault": false,
+  "tags": [
+    "device",
+    "windows-update",
+    "oobe",
+    "quality-update"
+  ]
+}

rules/analyze/ANALYZE-DEV-015.json

@@ -0,0 +1,117 @@
+{
+  "$schema": "../schema/analyze-rule.schema.json",
+  "ruleId": "ANALYZE-DEV-015",
+  "title": "OOBE Update Check Ended Without a Result",
+  "description": "Detects that the Windows quality update page at the end of OOBE started its Windows Update scan but ended without a scan result (oobe_update_page: startWUScanStartedSuccedded, an OobeNDUP stop and no ExpeditedUpdate_getUpdateResults name), on a device that is out of date and allowed to update. In the observed sessions the page ended two minutes after the scan started, on devices more than a year behind. The device finishes OOBE without the monthly security update. The agent's names_capped marker vetoes the finding: once the page's event names were capped, a missing scan result proves nothing.",
+  "severity": "warning",
+  "category": "device",
+  "version": "1.0.0",
+  "enabled": true,
+  "evaluateOn": [
+    "enrollment_end"
+  ],
+  "trigger": "single",
+  "baseConfidence": 75,
+  "confidenceThreshold": 60,
+  "conditions": [
+    {
+      "signal": "update_allowed",
+      "source": "event_data",
+      "eventType": "oobe_update_page",
+      "dataField": "value",
+      "operator": "equals",
+      "value": "true",
+      "filterField": "name",
+      "filterOperator": "equals",
+      "filterValue": "ExpeditedUpdate_isNDUPAllowedByCSPSucceeded",
+      "required": true
+    },
+    {
+      "signal": "scan_started",
+      "source": "event_data",
+      "eventType": "oobe_update_page",
+      "dataField": "name",
+      "operator": "equals",
+      "value": "ExpeditedUpdate_startWUScanStartedSuccedded",
+      "required": true
+    },
+    {
+      "signal": "no_scan_result",
+      "source": "event_data",
+      "eventType": "oobe_update_page",
+      "dataField": "name",
+      "operator": "not_exists",
+      "value": "",
+      "filterField": "name",
+      "filterOperator": "regex",
+      "filterValue": "^ExpeditedUpdate_getUpdateResults",
+      "required": true
+    },
+    {
+      "signal": "update_page_ended",
+      "source": "event_data",
+      "eventType": "oobe_update_page",
+      "dataField": "cxhEvent",
+      "operator": "equals",
+      "value": "page_stopped",
+      "filterField": "page",
+      "filterOperator": "equals",
+      "filterValue": "OobeNDUP",
+      "required": true
+    },
+    {
+      "signal": "days_out_of_date",
+      "source": "event_data",
+      "eventType": "oobe_update_page",
+      "dataField": "value",
+      "operator": "gt",
+      "value": "0",
+      "filterField": "name",
+      "filterOperator": "equals",
+      "filterValue": "ExpeditedUpdate_getDaysOutOfDateSucceeded",
+      "required": true
+    },
+    {
+      "signal": "page_names_complete",
+      "source": "event_data",
+      "eventType": "oobe_update_page",
+      "dataField": "cxhEvent",
+      "operator": "not_exists",
+      "value": "",
+      "filterField": "cxhEvent",
+      "filterOperator": "equals",
+      "filterValue": "names_capped",
+      "required": true
+    }
+  ],
+  "explanation": "The Windows quality update page at the end of OOBE started a Windows Update scan, but no scan result arrived before the page ended. The device is {{days_out_of_date}} days out of date, so an update was due — the device finished OOBE without the monthly security update and installs it only later, through the Windows Update policy that applies after enrollment. The page waits only a short time for the scan (two minutes in the observed sessions): a scan that takes longer, or cannot reach Windows Update, ends the page without an update.",
+  "remediation": [
+    {
+      "title": "Check the path to Windows Update during OOBE",
+      "steps": [
+        "Verify that devices in OOBE reach the Windows Update service: proxy, TLS inspection and firewall rules for the Windows Update endpoints.",
+        "Check whether an update policy applied during the Enrollment Status Page points the scan at another source, such as WSUS."
+      ]
+    },
+    {
+      "title": "Shorten the scan",
+      "steps": [
+        "Devices far behind scan longer; a current OS image or factory build keeps the OOBE scan short.",
+        "Verify the device's patch level after enrollment; the update ring assigned to the device installs the missing monthly security update on its normal schedule."
+      ]
+    }
+  ],
+  "relatedDocs": [
+    {
+      "title": "Microsoft Learn: Install Windows quality updates during OOBE (Enrollment Status Page)",
+      "url": "https://learn.microsoft.com/en-us/intune/device-enrollment/windows/setup-status-page#windows-monthly-security-update-release-details"
+    }
+  ],
+  "markSessionAsFailedDefault": false,
+  "tags": [
+    "device",
+    "windows-update",
+    "oobe",
+    "quality-update"
+  ]
+}

rules/dist/analyze-rules.json

@@ -1654,7 +1654,7 @@
       "description": "The device's real-time clock deviates from NTP by more than two minutes. Microsoft documents that a clock off by several minutes causes TPM attestation errors (self-deploying/pre-provisioning) and ESP timeouts.",
       "severity": "warning",
       "category": "device",
-      "version": "1.1.0",
+      "version": "1.1.1",
       "author": "Autopilot Monitor",
       "enabled": true,
       "evaluateOn": [
@@ -1666,7 +1666,7 @@
       "confidenceThreshold": 50,
       "conditions": [
         {
-          "signal": "clock_ahead",
+          "signal": "clock_behind",
           "source": "event_data",
           "eventType": "ntp_time_check",
           "dataField": "offsetSeconds",
@@ -1675,7 +1675,7 @@
           "required": false
         },
         {
-          "signal": "clock_behind",
+          "signal": "clock_ahead",
           "source": "event_data",
           "eventType": "ntp_time_check",
           "dataField": "offsetSeconds",
@@ -1930,6 +1930,357 @@
         "environment"
       ]
     },
+    {
+      "ruleId": "ANALYZE-DEV-013",
+      "title": "OOBE Quality Update Failed",
+      "description": "Detects that the Windows quality update page at the end of OOBE (Enrollment Status Page setting \"Install Windows quality updates\") reported a failed download or install and recorded no successful install afterwards — the page's own failure names on the oobe_update_page events. Setup usually continues, so the failure is otherwise invisible: the device finishes OOBE without the monthly security update. An OS build change across a restart (os_build_changed) vetoes the finding, and so does the agent's names_capped marker — once the page's event names were capped, a missing success name proves nothing. A downloadInstallFailureHelper entry alone is no failure: updates that installed fine log it too.",
+      "severity": "warning",
+      "category": "device",
+      "version": "1.0.0",
+      "enabled": true,
+      "evaluateOn": [
+        "enrollment_end"
+      ],
+      "trigger": "single",
+      "baseConfidence": 75,
+      "confidenceThreshold": 60,
+      "conditions": [
+        {
+          "signal": "update_failure",
+          "source": "event_data",
+          "eventType": "oobe_update_page",
+          "dataField": "name",
+          "operator": "in",
+          "value": "SdxWebAppCloudNDUP_processStatusChangeFromHandler_downloadFailedError,SdxWebAppCloudNDUP_processStatusChangeFromHandler_installFailedError,ExpeditedUpdate_commitExpeditionDownloadInstallAsyncFailure",
+          "required": true
+        },
+        {
+          "signal": "no_install_success",
+          "source": "event_data",
+          "eventType": "oobe_update_page",
+          "dataField": "name",
+          "operator": "not_exists",
+          "value": "",
+          "filterField": "name",
+          "filterOperator": "regex",
+          "filterValue": "installSucceededRebootRequired|commitExpeditionDownloadInstallAsyncSucceeded",
+          "required": true
+        },
+        {
+          "signal": "os_build_unchanged",
+          "source": "event_type",
+          "eventType": "os_build_changed",
+          "operator": "not_exists",
+          "value": "",
+          "required": true
+        },
+        {
+          "signal": "page_names_complete",
+          "source": "event_data",
+          "eventType": "oobe_update_page",
+          "dataField": "cxhEvent",
+          "operator": "not_exists",
+          "value": "",
+          "filterField": "cxhEvent",
+          "filterOperator": "equals",
+          "filterValue": "names_capped",
+          "required": true
+        },
+        {
+          "signal": "update_page_failed",
+          "source": "event_data",
+          "eventType": "oobe_update_page",
+          "dataField": "result",
+          "operator": "equals",
+          "value": "fail",
+          "filterField": "page",
+          "filterOperator": "equals",
+          "filterValue": "OobeNDUP",
+          "required": false
+        },
+        {
+          "signal": "update_skipped",
+          "source": "event_data",
+          "eventType": "oobe_update_page",
+          "dataField": "name",
+          "operator": "regex",
+          "value": "SkipDownloadInstallButtonClicked$",
+          "required": false
+        }
+      ],
+      "confidenceFactors": [
+        {
+          "signal": "update_page_failed",
+          "condition": "exists",
+          "weight": 10
+        }
+      ],
+      "explanation": "The Windows quality update page at the end of OOBE reported `{{update_failure}}`, and no successful install was recorded afterwards. When the download or install of the update fails, the page gives up and setup continues, so the enrollment itself can still succeed — but the device most likely finished OOBE without the monthly security update and installs it only later, through the Windows Update policy that applies after enrollment. Selecting Skip on the page after the failure leads to the same result.",
+      "remediation": [
+        {
+          "title": "Find out why the update failed",
+          "steps": [
+            "Open the oobe_update_page events around the failure in the session timeline: the download progress before it shows how far the download got, and a Skip after it shows that someone chose to continue.",
+            "Check the network path the device uses during OOBE for Windows Update and Delivery Optimization: proxy, TLS inspection and firewall rules for the Windows Update endpoints.",
+            "Compare with other devices: the same failure on many devices of one site points at the network path, on one model at the device, and across the fleet at the update itself."
+          ]
+        },
+        {
+          "title": "Make sure the device gets the update",
+          "steps": [
+            "Verify the device's patch level after enrollment; the update ring assigned to the device installs the missing monthly security update on its normal schedule.",
+            "Where the OOBE quality update keeps failing for one network or device group, decide per Enrollment Status Page profile whether \"Install Windows quality updates\" should stay on."
+          ]
+        }
+      ],
+      "relatedDocs": [
+        {
+          "title": "Microsoft Learn: Install Windows quality updates during OOBE (Enrollment Status Page)",
+          "url": "https://learn.microsoft.com/en-us/intune/device-enrollment/windows/setup-status-page#windows-monthly-security-update-release-details"
+        }
+      ],
+      "markSessionAsFailedDefault": false,
+      "tags": [
+        "device",
+        "windows-update",
+        "oobe",
+        "quality-update"
+      ]
+    },
+    {
+      "ruleId": "ANALYZE-DEV-014",
+      "title": "OOBE Quality Update Not Offered After an Earlier Failure",
+      "description": "Detects that the Windows quality update page at the end of OOBE found no update to install although the device is out of date, on a device whose update page counts an earlier failed download or install (oobe_update_page: NDUPDownloadInstallPreviousFailureCount above 0, osUpdatesWithNDUPPI false, getDaysOutOfDateSucceeded above 0). No failure and no install success are recorded in this session — a failure in this session is ANALYZE-DEV-013 — and the agent's names_capped marker vetoes the finding, because a missing name proves nothing once the page's names were capped. The device finishes OOBE without the monthly security update.",
+      "severity": "warning",
+      "category": "device",
+      "version": "1.0.0",
+      "enabled": true,
+      "evaluateOn": [
+        "enrollment_end"
+      ],
+      "trigger": "single",
+      "baseConfidence": 75,
+      "confidenceThreshold": 60,
+      "conditions": [
+        {
+          "signal": "previous_failures",
+          "source": "event_data",
+          "eventType": "oobe_update_page",
+          "dataField": "value",
+          "operator": "gt",
+          "value": "0",
+          "filterField": "name",
+          "filterOperator": "equals",
+          "filterValue": "SdxWebAppCloudNDUP_initialize_NDUPDownloadInstallPreviousFailureCount",
+          "required": true
+        },
+        {
+          "signal": "nothing_offered",
+          "source": "event_data",
+          "eventType": "oobe_update_page",
+          "dataField": "value",
+          "operator": "equals",
+          "value": "false",
+          "filterField": "name",
+          "filterOperator": "equals",
+          "filterValue": "SdxWebAppCloudNDUP_updateManager_processUpdatesMetadata_osUpdatesWithNDUPPI",
+          "required": true
+        },
+        {
+          "signal": "days_out_of_date",
+          "source": "event_data",
+          "eventType": "oobe_update_page",
+          "dataField": "value",
+          "operator": "gt",
+          "value": "0",
+          "filterField": "name",
+          "filterOperator": "equals",
+          "filterValue": "ExpeditedUpdate_getDaysOutOfDateSucceeded",
+          "required": true
+        },
+        {
+          "signal": "no_update_failure",
+          "source": "event_data",
+          "eventType": "oobe_update_page",
+          "dataField": "name",
+          "operator": "not_exists",
+          "value": "",
+          "filterField": "name",
+          "filterOperator": "in",
+          "filterValue": "SdxWebAppCloudNDUP_processStatusChangeFromHandler_downloadFailedError,SdxWebAppCloudNDUP_processStatusChangeFromHandler_installFailedError,ExpeditedUpdate_commitExpeditionDownloadInstallAsyncFailure",
+          "required": true
+        },
+        {
+          "signal": "no_install_success",
+          "source": "event_data",
+          "eventType": "oobe_update_page",
+          "dataField": "name",
+          "operator": "not_exists",
+          "value": "",
+          "filterField": "name",
+          "filterOperator": "regex",
+          "filterValue": "installSucceededRebootRequired|commitExpeditionDownloadInstallAsyncSucceeded",
+          "required": true
+        },
+        {
+          "signal": "page_names_complete",
+          "source": "event_data",
+          "eventType": "oobe_update_page",
+          "dataField": "cxhEvent",
+          "operator": "not_exists",
+          "value": "",
+          "filterField": "cxhEvent",
+          "filterOperator": "equals",
+          "filterValue": "names_capped",
+          "required": true
+        }
+      ],
+      "explanation": "The Windows quality update page at the end of OOBE checked for updates and found none to install, although Windows reports the device as {{days_out_of_date}} days out of date. The page's failure counter for this device stands at {{previous_failures}}: an earlier download or install of an OOBE quality update on this device failed. The device finished OOBE without the monthly security update and installs it only later, through the Windows Update policy that applies after enrollment.",
+      "remediation": [
+        {
+          "title": "Check the earlier attempt",
+          "steps": [
+            "Look at the device's earlier enrollment sessions — the failed attempt and its ANALYZE-DEV-013 finding are usually there.",
+            "Verify the device's patch level after enrollment; the update ring assigned to the device installs the missing monthly security update on its normal schedule."
+          ]
+        },
+        {
+          "title": "Reduce how far behind devices start",
+          "steps": [
+            "Devices that start OOBE many months behind need a long update during setup; a current OS image or factory build shortens it and gives a failed attempt less to repeat."
+          ]
+        }
+      ],
+      "relatedDocs": [
+        {
+          "title": "Microsoft Learn: Install Windows quality updates during OOBE (Enrollment Status Page)",
+          "url": "https://learn.microsoft.com/en-us/intune/device-enrollment/windows/setup-status-page#windows-monthly-security-update-release-details"
+        }
+      ],
+      "markSessionAsFailedDefault": false,
+      "tags": [
+        "device",
+        "windows-update",
+        "oobe",
+        "quality-update"
+      ]
+    },
+    {
+      "ruleId": "ANALYZE-DEV-015",
+      "title": "OOBE Update Check Ended Without a Result",
+      "description": "Detects that the Windows quality update page at the end of OOBE started its Windows Update scan but ended without a scan result (oobe_update_page: startWUScanStartedSuccedded, an OobeNDUP stop and no ExpeditedUpdate_getUpdateResults name), on a device that is out of date and allowed to update. In the observed sessions the page ended two minutes after the scan started, on devices more than a year behind. The device finishes OOBE without the monthly security update. The agent's names_capped marker vetoes the finding: once the page's event names were capped, a missing scan result proves nothing.",
+      "severity": "warning",
+      "category": "device",
+      "version": "1.0.0",
+      "enabled": true,
+      "evaluateOn": [
+        "enrollment_end"
+      ],
+      "trigger": "single",
+      "baseConfidence": 75,
+      "confidenceThreshold": 60,
+      "conditions": [
+        {
+          "signal": "update_allowed",
+          "source": "event_data",
+          "eventType": "oobe_update_page",
+          "dataField": "value",
+          "operator": "equals",
+          "value": "true",
+          "filterField": "name",
+          "filterOperator": "equals",
+          "filterValue": "ExpeditedUpdate_isNDUPAllowedByCSPSucceeded",
+          "required": true
+        },
+        {
+          "signal": "scan_started",
+          "source": "event_data",
+          "eventType": "oobe_update_page",
+          "dataField": "name",
+          "operator": "equals",
+          "value": "ExpeditedUpdate_startWUScanStartedSuccedded",
+          "required": true
+        },
+        {
+          "signal": "no_scan_result",
+          "source": "event_data",
+          "eventType": "oobe_update_page",
+          "dataField": "name",
+          "operator": "not_exists",
+          "value": "",
+          "filterField": "name",
+          "filterOperator": "regex",
+          "filterValue": "^ExpeditedUpdate_getUpdateResults",
+          "required": true
+        },
+        {
+          "signal": "update_page_ended",
+          "source": "event_data",
+          "eventType": "oobe_update_page",
+          "dataField": "cxhEvent",
+          "operator": "equals",
+          "value": "page_stopped",
+          "filterField": "page",
+          "filterOperator": "equals",
+          "filterValue": "OobeNDUP",
+          "required": true
+        },
+        {
+          "signal": "days_out_of_date",
+          "source": "event_data",
+          "eventType": "oobe_update_page",
+          "dataField": "value",
+          "operator": "gt",
+          "value": "0",
+          "filterField": "name",
+          "filterOperator": "equals",
+          "filterValue": "ExpeditedUpdate_getDaysOutOfDateSucceeded",
+          "required": true
+        },
+        {
+          "signal": "page_names_complete",
+          "source": "event_data",
+          "eventType": "oobe_update_page",
+          "dataField": "cxhEvent",
+          "operator": "not_exists",
+          "value": "",
+          "filterField": "cxhEvent",
+          "filterOperator": "equals",
+          "filterValue": "names_capped",
+          "required": true
+        }
+      ],
+      "explanation": "The Windows quality update page at the end of OOBE started a Windows Update scan, but no scan result arrived before the page ended. The device is {{days_out_of_date}} days out of date, so an update was due — the device finished OOBE without the monthly security update and installs it only later, through the Windows Update policy that applies after enrollment. The page waits only a short time for the scan (two minutes in the observed sessions): a scan that takes longer, or cannot reach Windows Update, ends the page without an update.",
+      "remediation": [
+        {
+          "title": "Check the path to Windows Update during OOBE",
+          "steps": [
+            "Verify that devices in OOBE reach the Windows Update service: proxy, TLS inspection and firewall rules for the Windows Update endpoints.",
+            "Check whether an update policy applied during the Enrollment Status Page points the scan at another source, such as WSUS."
+          ]
+        },
+        {
+          "title": "Shorten the scan",
+          "steps": [
+            "Devices far behind scan longer; a current OS image or factory build keeps the OOBE scan short.",
+            "Verify the device's patch level after enrollment; the update ring assigned to the device installs the missing monthly security update on its normal schedule."
+          ]
+        }
+      ],
+      "relatedDocs": [
+        {
+          "title": "Microsoft Learn: Install Windows quality updates during OOBE (Enrollment Status Page)",
+          "url": "https://learn.microsoft.com/en-us/intune/device-enrollment/windows/setup-status-page#windows-monthly-security-update-release-details"
+        }
+      ],
+      "markSessionAsFailedDefault": false,
+      "tags": [
+        "device",
+        "windows-update",
+        "oobe",
+        "quality-update"
+      ]
+    },
     {
       "ruleId": "ANALYZE-ENRL-001",
       "title": "Enrollment Failed",

rules/scripts/.npmrc

@@ -1,3 +0,0 @@
-# ajv-cli declares ts-node as a peer dependency it never needs for JSON schemas; do not
-# pull ts-node + typescript into a job that pushes to main.
-legacy-peer-deps=true

rules/scripts/combine.js

@@ -86,12 +86,12 @@ for (const config of configs) {
 // ── Guardrails generation ───────────────────────────────────────────────────
 
 const guardrailsPath = path.join(rulesRoot, 'guardrails.json');
-// NOTE: consumers import from "@/utils/guardrails.generated" (see guardValidation.ts
+// NOTE: consumers import from "@/lib/generated/guardrails.generated" (see guardValidation.ts
 // and SectionGatherRules.tsx). The web re-org (commit a3e8e044) moved this file to
 // utils/ but left this output path pointing at the now-orphaned lib/ copy, which
 // silently froze the live allowlist. Keep this in sync with the import path.
 const guardrailsOutput = path.resolve(
-  rulesRoot, '..', 'src', 'Web', 'autopilot-monitor-web', 'utils', 'guardrails.generated.ts'
+  rulesRoot, '..', 'src', 'Web', 'autopilot-monitor-web', 'lib', 'generated', 'guardrails.generated.ts'
 );
 
 if (fs.existsSync(guardrailsPath)) {

rules/scripts/package-lock.json

@@ -6,7 +6,7 @@
     "": {
       "name": "autopilot-monitor-rules-tooling",
       "devDependencies": {
-        "ajv-cli": "5.0.0",
+        "ajv": "8.20.0",
         "ajv-formats": "3.0.1"
       }
     },
@@ -27,33 +27,6 @@
         "url": "https://github.com/sponsors/epoberezkin"
       }
     },
-    "node_modules/ajv-cli": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/ajv-cli/-/ajv-cli-5.0.0.tgz",
-      "integrity": "sha512-LY4m6dUv44HTyhV+u2z5uX4EhPYTM38Iv1jdgDJJJCyOOuqB8KtZEGjPZ2T+sh5ZIJrXUfgErYx/j3gLd3+PlQ==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "ajv": "^8.0.0",
-        "fast-json-patch": "^2.0.0",
-        "glob": "^7.1.0",
-        "js-yaml": "^3.14.0",
-        "json-schema-migrate": "^2.0.0",
-        "json5": "^2.1.3",
-        "minimist": "^1.2.0"
-      },
-      "bin": {
-        "ajv": "dist/index.js"
-      },
-      "peerDependencies": {
-        "ts-node": ">=9.0.0"
-      },
-      "peerDependenciesMeta": {
-        "ts-node": {
-          "optional": true
-        }
-      }
-    },
     "node_modules/ajv-formats": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/ajv-formats/-/ajv-formats-3.0.1.tgz",
@@ -72,55 +45,6 @@
         }
       }
     },
-    "node_modules/argparse": {
-      "version": "1.0.10",
-      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
-      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "sprintf-js": "~1.0.2"
-      }
-    },
-    "node_modules/balanced-match": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
-      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==",
-      "dev": true,
-      "license": "MIT"
-    },
-    "node_modules/brace-expansion": {
-      "version": "1.1.21",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.21.tgz",
-      "integrity": "sha512-9zeA+KLZNNzglF2TPKRQEDyx6Yby7daAkuy8MiPzpXPsYDWi/DRM8jmwUDxokQjYqBpv5DgPiwD4h4ZZSy1Ujw==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "balanced-match": "^1.0.0",
-        "concat-map": "0.0.1"
-      }
-    },
-    "node_modules/concat-map": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
-      "integrity": "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg==",
-      "dev": true,
-      "license": "MIT"
-    },
-    "node_modules/esprima": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/esprima/-/esprima-4.0.1.tgz",
-      "integrity": "sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A==",
-      "dev": true,
-      "license": "BSD-2-Clause",
-      "bin": {
-        "esparse": "bin/esparse.js",
-        "esvalidate": "bin/esvalidate.js"
-      },
-      "engines": {
-        "node": ">=4"
-      }
-    },
     "node_modules/fast-deep-equal": {
       "version": "3.1.3",
       "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz",
@@ -128,13 +52,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/fast-json-patch": {
-      "version": "3.1.1",
-      "resolved": "https://registry.npmjs.org/fast-json-patch/-/fast-json-patch-3.1.1.tgz",
-      "integrity": "sha512-vf6IHUX2SBcA+5/+4883dsIjpBTqmfBjmYiWK1savxQmFk4JfBMLa7ynTYOs1Rolp/T1betJxHiGD3g1Mn8lUQ==",
-      "dev": true,
-      "license": "MIT"
-    },
     "node_modules/fast-uri": {
       "version": "3.1.8",
       "resolved": "https://registry.npmjs.org/fast-uri/-/fast-uri-3.1.8.tgz",
@@ -152,78 +69,6 @@
       ],
       "license": "BSD-3-Clause"
     },
-    "node_modules/fs.realpath": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
-      "integrity": "sha512-OO0pH2lK6a0hZnAdau5ItzHPI6pUlvI7jMVnxUQRtw4owF2wk8lOSabtGDCTP4Ggrg2MbGnWO9X8K1t4+fGMDw==",
-      "dev": true,
-      "license": "ISC"
-    },
-    "node_modules/glob": {
-      "version": "7.2.3",
-      "resolved": "https://registry.npmjs.org/glob/-/glob-7.2.3.tgz",
-      "integrity": "sha512-nFR0zLpU2YCaRxwoCJvL6UvCH2JFyFVIvwTLsIf21AuHlMskA1hhTdk+LlYJtOlYt9v6dvszD2BGRqBL+iQK9Q==",
-      "deprecated": "Old versions of glob are not supported, and contain widely publicized security vulnerabilities, which have been fixed in the current version. Please update. Support for old versions may be purchased (at exorbitant rates) by contacting i@izs.me",
-      "dev": true,
-      "license": "ISC",
-      "dependencies": {
-        "fs.realpath": "^1.0.0",
-        "inflight": "^1.0.4",
-        "inherits": "2",
-        "minimatch": "^3.1.1",
-        "once": "^1.3.0",
-        "path-is-absolute": "^1.0.0"
-      },
-      "engines": {
-        "node": "*"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/isaacs"
-      }
-    },
-    "node_modules/inflight": {
-      "version": "1.0.6",
-      "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.6.tgz",
-      "integrity": "sha512-k92I/b08q4wvFscXCLvqfsHCrjrF7yiXsQuIVvVE7N82W3+aqpzuUdBbfhWcy/FZR3/4IgflMgKLOsvPDrGCJA==",
-      "deprecated": "This module is not supported, and leaks memory. Do not use it. Check out lru-cache if you want a good and tested way to coalesce async requests by a key value, which is much more comprehensive and powerful.",
-      "dev": true,
-      "license": "ISC",
-      "dependencies": {
-        "once": "^1.3.0",
-        "wrappy": "1"
-      }
-    },
-    "node_modules/inherits": {
-      "version": "2.0.4",
-      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
-      "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==",
-      "dev": true,
-      "license": "ISC"
-    },
-    "node_modules/js-yaml": {
-      "version": "3.15.2",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.15.2.tgz",
-      "integrity": "sha512-6EuL879VkRA+1Cz578mKMiKvjPNEuk6+r1JaFzoSWejZmtf7xWbIyw1e3KkxlkzTIt9Taw6JBhEppG7utc1P+w==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "argparse": "^1.0.7",
-        "esprima": "^4.0.0"
-      },
-      "bin": {
-        "js-yaml": "bin/js-yaml.js"
-      }
-    },
-    "node_modules/json-schema-migrate": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/json-schema-migrate/-/json-schema-migrate-2.0.0.tgz",
-      "integrity": "sha512-r38SVTtojDRp4eD6WsCqiE0eNDt4v1WalBXb9cyZYw9ai5cGtBwzRNWjHzJl38w6TxFkXAIA7h+fyX3tnrAFhQ==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "ajv": "^8.0.0"
-      }
-    },
     "node_modules/json-schema-traverse": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-1.0.0.tgz",
@@ -231,62 +76,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/json5": {
-      "version": "2.2.3",
-      "resolved": "https://registry.npmjs.org/json5/-/json5-2.2.3.tgz",
-      "integrity": "sha512-XmOWe7eyHYH14cLdVPoyg+GOH3rYX++KpzrylJwSW98t3Nk+U8XOl8FWKOgwtzdb8lXGf6zYwDUzeHMWfxasyg==",
-      "dev": true,
-      "license": "MIT",
-      "bin": {
-        "json5": "lib/cli.js"
-      },
-      "engines": {
-        "node": ">=6"
-      }
-    },
-    "node_modules/minimatch": {
-      "version": "3.1.5",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.5.tgz",
-      "integrity": "sha512-VgjWUsnnT6n+NUk6eZq77zeFdpW2LWDzP6zFGrCbHXiYNul5Dzqk2HHQ5uFH2DNW5Xbp8+jVzaeNt94ssEEl4w==",
-      "dev": true,
-      "license": "ISC",
-      "dependencies": {
-        "brace-expansion": "^1.1.7"
-      },
-      "engines": {
-        "node": "*"
-      }
-    },
-    "node_modules/minimist": {
-      "version": "1.2.8",
-      "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.8.tgz",
-      "integrity": "sha512-2yyAR8qBkN3YuheJanUpWC5U3bb5osDywNB8RzDVlDwDHbocAJveqqj1u8+SVD7jkWT4yvsHCpWqqWqAxb0zCA==",
-      "dev": true,
-      "license": "MIT",
-      "funding": {
-        "url": "https://github.com/sponsors/ljharb"
-      }
-    },
-    "node_modules/once": {
-      "version": "1.4.0",
-      "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
-      "integrity": "sha512-lNaJgI+2Q5URQBkccEKHTQOPaXdUxnZZElQTZY0MFUAuaEqe1E+Nyvgdz/aIyNi6Z9MzO5dv1H8n58/GELp3+w==",
-      "dev": true,
-      "license": "ISC",
-      "dependencies": {
-        "wrappy": "1"
-      }
-    },
-    "node_modules/path-is-absolute": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
-      "integrity": "sha512-AVbw3UJ2e9bq64vSaS9Am0fje1Pa8pbGqTTsmXfaIiMpnr5DlDhfJOuLj9Sf95ZPVDAUerDfEk88MPmPe7UCQg==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": ">=0.10.0"
-      }
-    },
     "node_modules/require-from-string": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/require-from-string/-/require-from-string-2.0.2.tgz",
@@ -296,20 +85,6 @@
       "engines": {
         "node": ">=0.10.0"
       }
-    },
-    "node_modules/sprintf-js": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
-      "integrity": "sha512-D9cPgkvLlV3t3IzL0D0YLvGA9Ahk4PcvVwUbN0dSGr1aP0Nrt4AEnTUbuGvquEC0mA64Gqt1fzirlRs5ibXx8g==",
-      "dev": true,
-      "license": "BSD-3-Clause"
-    },
-    "node_modules/wrappy": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
-      "dev": true,
-      "license": "ISC"
     }
   }
 }

rules/scripts/package.json

@@ -3,10 +3,7 @@
   "private": true,
   "description": "Validator tooling for rules/ - combine-rules.yml installs from the lockfile so nothing unpinned reaches a job that pushes to main.",
   "devDependencies": {
-    "ajv-cli": "5.0.0",
+    "ajv": "8.20.0",
     "ajv-formats": "3.0.1"
-  },
-  "overrides": {
-    "fast-json-patch": "3.1.1"
   }
 }

rules/scripts/validate.js

@@ -0,0 +1,63 @@
+#!/usr/bin/env node
+/**
+ * Validates every rule file and rules/guardrails.json against its JSON Schema
+ * (draft 2020-12). combine-rules.yml runs this before combine.js; any invalid
+ * file fails the run with exit code 1.
+ *
+ * Run: node rules/scripts/validate.js   (after `npm ci --ignore-scripts` in rules/scripts)
+ */
+
+const fs = require('fs');
+const path = require('path');
+const Ajv2020 = require('ajv/dist/2020');
+const addFormats = require('ajv-formats');
+
+const rulesRoot = path.resolve(__dirname, '..');
+
+const jsonFilesIn = (dir) =>
+  fs.readdirSync(path.join(rulesRoot, dir)).filter(f => f.endsWith('.json')).sort().map(f => `${dir}/${f}`);
+
+const sets = [
+  { schema: 'gather-rule.schema.json', files: jsonFilesIn('gather') },
+  { schema: 'analyze-rule.schema.json', files: jsonFilesIn('analyze') },
+  { schema: 'ime-log-pattern.schema.json', files: jsonFilesIn('ime-log-patterns') },
+  // guardrails.json values are baked verbatim into generated TypeScript that is
+  // auto-committed to main and shipped to the portal - the schema forbids control
+  // and line-terminator characters so a "data" PR can never become code.
+  { schema: 'guardrails.schema.json', files: ['guardrails.json'] }
+];
+
+const ajv = new Ajv2020({ allErrors: true });
+addFormats(ajv);
+
+let invalid = 0;
+
+for (const set of sets) {
+  const validate = ajv.compile(JSON.parse(fs.readFileSync(path.join(rulesRoot, 'schema', set.schema), 'utf8')));
+
+  for (const file of set.files) {
+    let data;
+    try {
+      data = JSON.parse(fs.readFileSync(path.join(rulesRoot, file), 'utf8'));
+    } catch (err) {
+      invalid++;
+      console.error(`INVALID rules/${file}: ${err.message}`);
+      continue;
+    }
+
+    if (!validate(data)) {
+      invalid++;
+      console.error(`INVALID rules/${file}`);
+      for (const e of validate.errors) {
+        console.error(`  ${e.instancePath || '(root)'} ${e.message} ${JSON.stringify(e.params)}`);
+      }
+    }
+  }
+
+  console.log(`${set.schema}: ${set.files.length} files checked`);
+}
+
+if (invalid > 0) {
+  console.error(`ERROR: ${invalid} file(s) failed schema validation`);
+  process.exit(1);
+}

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Configuration/RemoteConfigMergerCompletenessTests.cs

@@ -50,6 +50,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Configuration
             nameof(AgentConfigResponse.MaxBatchSize),
             nameof(AgentConfigResponse.MaxAuthFailures),
             nameof(AgentConfigResponse.AuthFailureTimeoutMinutes),
+            nameof(AgentConfigResponse.InterceptedRegistrationRetryBoots),
             // Merge reads two Collectors knobs (AgentMaxLifetimeMinutes, HelloWaitTimeoutSeconds);
             // the remaining CollectorConfiguration flags flow untouched to DefaultComponentFactory.
             nameof(AgentConfigResponse.Collectors),

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Configuration/RemoteConfigMergerTests.cs

@@ -55,6 +55,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Configuration
             UnrestrictedMode = true,
             MaxAuthFailures = 7,
             AuthFailureTimeoutMinutes = 15,
+            InterceptedRegistrationRetryBoots = 2,
             EnableImeMatchLog = true,
             Collectors = new CollectorConfiguration
             {
@@ -98,6 +99,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Configuration
             Assert.Equal(45, agent.HelloWaitTimeoutSeconds);
             Assert.Equal(7, agent.MaxAuthFailures);
             Assert.Equal(15, agent.AuthFailureTimeoutMinutes);
+            Assert.Equal(2, agent.InterceptedRegistrationRetryBoots);
 
             Assert.NotNull(result);
             Assert.True(result.UnrestrictedModeChanged);
@@ -468,6 +470,50 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Configuration
             Assert.Equal(0, agent.AgentMaxLifetimeMinutes);
         }
 
+        // ============================================================= Intercepted-registration buffer
+
+        [Theory]
+        [InlineData(0)] // clean up at the first intercepted registration
+        [InlineData(3)]
+        public void Merge_copies_intercepted_registration_retry_boots(int remoteValue)
+        {
+            var agent = NewAgentConfig();
+            var remote = FullRemote();
+            remote.InterceptedRegistrationRetryBoots = remoteValue;
+
+            RemoteConfigMerger.Merge(agent, remote);
+
+            Assert.Equal(remoteValue, agent.InterceptedRegistrationRetryBoots);
+        }
+
+        [Fact]
+        public void Merge_keeps_the_agent_default_when_the_backend_sends_no_intercepted_registration_retry_boots()
+        {
+            var agent = NewAgentConfig();
+            var remote = FullRemote();
+            remote.InterceptedRegistrationRetryBoots = null; // backend that predates the field
+
+            RemoteConfigMerger.Merge(agent, remote);
+
+            Assert.Equal(1, agent.InterceptedRegistrationRetryBoots);
+        }
+
+        [Theory]
+        [InlineData(-1, 0)]
+        [InlineData(int.MinValue, 0)]
+        [InlineData(6, 5)]
+        [InlineData(int.MaxValue, 5)]
+        public void Merge_clamps_intercepted_registration_retry_boots_to_zero_through_five(int remoteValue, int expected)
+        {
+            var agent = NewAgentConfig();
+            var remote = FullRemote();
+            remote.InterceptedRegistrationRetryBoots = remoteValue;
+
+            RemoteConfigMerger.Merge(agent, remote);
+
+            Assert.Equal(expected, agent.InterceptedRegistrationRetryBoots);
+        }
+
         // ============================================================= Guard
 
         [Fact]

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Configuration/RemoteConfigServiceCacheHardeningTests.cs

@@ -214,6 +214,23 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Configuration
             Assert.Null(loaded.LatestAgentSha256);
         }
 
+        [Theory]
+        [InlineData(0)]
+        [InlineData(3)]
+        [InlineData(null)] // backend that predates the field — the agent keeps its default
+        public void RoundTrip_preserves_intercepted_registration_retry_boots(int? value)
+        {
+            // An intercepted start gets no live config, so the registration buffer it decides on
+            // is the cached value: it must survive the write + read strip untouched.
+            var probe = NewProbe();
+
+            probe.DoCache(new AgentConfigResponse { InterceptedRegistrationRetryBoots = value });
+            var loaded = probe.DoLoad();
+
+            Assert.NotNull(loaded);
+            Assert.Equal(value, loaded.InterceptedRegistrationRetryBoots);
+        }
+
         // ── Helpers ─────────────────────────────────────────────────────────
 
         private CacheProbe NewProbe()

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Configuration/RemoteConfigServiceRetryTests.cs

@@ -7,6 +7,7 @@ using AutopilotMonitor.Agent.V2.Core.Logging;
 using AutopilotMonitor.Agent.V2.Core.Monitoring.Transport;
 using AutopilotMonitor.Agent.V2.Core.Security;
 using AutopilotMonitor.Agent.V2.Core.Tests.Harness;
+using AutopilotMonitor.Agent.V2.Core.Tests.Transport;
 using AutopilotMonitor.Shared.Models;
 using Xunit;
 
@@ -101,6 +102,28 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Configuration
             Assert.Equal(401, svc.LastFetchAuthStatusCode);
         }
 
+        [Fact]
+        public async Task FetchConfig_InterceptedAnswer_FallsBack_WithoutCounting_AndReportsOnce()
+        {
+            // A 403 something on the network path answered (TLS inspection): same fallback as an
+            // auth failure, but the tracker does not count it — it sends ClientCertificateNotReceived.
+            var distress = new FakeDistressReporter();
+            var tracker = new AuthFailureTracker(maxFailures: 5, timeoutMinutes: 0,
+                AutopilotMonitor.DecisionCore.Engine.SystemClock.Instance, _logger, distress);
+            var svc = NewService(BackendBehaviour.AlwaysIntercepted403, tracker);
+
+            var result = await svc.FetchConfigAsync(retryOnTransientErrors: true);
+
+            Assert.NotNull(result);
+            Assert.Equal(RemoteConfigFetchOutcome.UsedDefaults, svc.LastFetchOutcome);
+            Assert.Equal(1, svc.LastFetchAttempts);
+            Assert.Equal(403, svc.LastFetchAuthStatusCode);
+            Assert.Equal(0, tracker.ConsecutiveFailures);
+            var call = Assert.Single(distress.Calls);
+            Assert.Equal(DistressErrorType.ClientCertificateNotReceived, call.ErrorType);
+            Assert.StartsWith("agent/config http 403 client_certificate_required", call.Message);
+        }
+
         [Fact]
         public async Task FetchConfig_RetryDisabled_OneAttemptOnly()
         {
@@ -144,7 +167,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Configuration
             Assert.Equal(4, svc.LastFetchAttempts);
         }
 
-        // ── Network-link gate (tenant aebdce78 audit 2026-08-24) ────────────
+        // ── Network-link gate (kiosk-tenant audit 2026-08-24) ────────────
 
         [Fact]
         public async Task FetchConfig_InitialFetch_WaitsForNetworkLink()
@@ -252,10 +275,11 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Configuration
             /// <summary>All 4 initial attempts fail; the NEXT call (the recovery fetch) succeeds.</summary>
             FailAllThenSucceed,
             AlwaysAuthFailure401,
+            AlwaysIntercepted403,
             AlwaysReturnNull,
         }
 
-        private FakeRemoteConfigService NewService(BackendBehaviour behaviour)
+        private FakeRemoteConfigService NewService(BackendBehaviour behaviour, AuthFailureTracker? tracker = null)
         {
             // Pass a throwaway BackendApiClient — the fake overrides CallBackendAsync
             // before it ever hits the wire.
@@ -269,7 +293,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Configuration
                 bootstrapToken: null,
                 agentVersion: "0.0.0",
                 logger: _logger);
-            return new FakeRemoteConfigService(apiClient, _logger, behaviour);
+            return new FakeRemoteConfigService(apiClient, _logger, behaviour, tracker);
         }
 
         private sealed class FakeRemoteConfigService : RemoteConfigService
@@ -277,8 +301,8 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Configuration
             private readonly BackendBehaviour _behaviour;
             private int _calls;
 
-            public FakeRemoteConfigService(BackendApiClient apiClient, AgentLogger logger, BackendBehaviour behaviour)
-                : base(apiClient, "00000000-0000-0000-0000-000000000001", logger)
+            public FakeRemoteConfigService(BackendApiClient apiClient, AgentLogger logger, BackendBehaviour behaviour, AuthFailureTracker? tracker)
+                : base(apiClient, "00000000-0000-0000-0000-000000000001", logger, authFailureTracker: tracker)
             {
                 _behaviour = behaviour;
             }
@@ -305,6 +329,9 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Configuration
                         throw new HttpRequestException("simulated network failure");
                     case BackendBehaviour.AlwaysAuthFailure401:
                         throw new BackendAuthException("Unauthorized", 401);
+                    case BackendBehaviour.AlwaysIntercepted403:
+                        throw new BackendAuthException("The device certificate did not reach the backend.", 403,
+                            classification: InterceptionFixtures.CertificateRequired());
                     case BackendBehaviour.AlwaysReturnNull:
                         return Task.FromResult<AgentConfigResponse>(null!);
                     default:

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Harness/FakeDistressReporter.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using AutopilotMonitor.Agent.V2.Core.Monitoring.Transport;
+using AutopilotMonitor.Shared.Models;
+
+namespace AutopilotMonitor.Agent.V2.Core.Tests.Harness
+{
+    /// <summary>
+    /// Records every distress dispatch instead of sending it. The real anti-flood rules of
+    /// <see cref="DistressReporter"/> are bypassed on purpose: tests assert what the caller dispatched.
+    /// </summary>
+    internal sealed class FakeDistressReporter : DistressReporter
+    {
+        public sealed class Call
+        {
+            public DistressErrorType ErrorType { get; set; }
+            public string Message { get; set; } = default!;
+            public int? HttpStatusCode { get; set; }
+        }
+
+        public List<Call> Calls { get; } = new List<Call>();
+
+        /// <summary>
+        /// The send each dispatch returns; null = already completed. Lets a test keep a send in
+        /// flight to prove a caller waits for it (or stops waiting at its bound).
+        /// </summary>
+        public Func<Task>? Send { get; set; }
+
+        public FakeDistressReporter()
+            : base(baseUrl: "https://example.test", tenantId: "t", manufacturer: "m", model: "d", serialNumber: "s", agentVersion: "0.0.0", logger: null!)
+        {
+        }
+
+        public override Task TrySendAsync(DistressErrorType errorType, string message, int? httpStatusCode = null)
+        {
+            Calls.Add(new Call { ErrorType = errorType, Message = message, HttpStatusCode = httpStatusCode });
+            return Send?.Invoke() ?? Task.CompletedTask;
+        }
+    }
+}

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Monitoring/Analyzers/SoftwareInventoryRegistryTextTests.cs

@@ -0,0 +1,31 @@
+#nullable enable
+using AutopilotMonitor.Agent.V2.Core.Monitoring.Telemetry.Analyzers;
+using Xunit;
+
+namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.Analyzers
+{
+    /// <summary>
+    /// Uninstall-key strings are read the way Windows shows them: up to the first NUL. Installers
+    /// that pad REG_SZ data with NULs otherwise leak them into the normalized vendor/name, which
+    /// the backend turns into a table key.
+    /// </summary>
+    public sealed class SoftwareInventoryRegistryTextTests
+    {
+        [Theory]
+        [InlineData("Contoso Widget", "Contoso Widget")]
+        [InlineData("Contoso Widget\0\0\0\0\0", "Contoso Widget")]
+        [InlineData("Contoso\0stale buffer", "Contoso")]
+        [InlineData("\0\0\0", "")]
+        [InlineData("", "")]
+        public void CutAtNul_KeepsTheTextBeforeTheFirstNul(string raw, string expected)
+        {
+            Assert.Equal(expected, SoftwareInventoryAnalyzer.CutAtNul(raw));
+        }
+
+        [Fact]
+        public void CutAtNul_Null_StaysNull()
+        {
+            Assert.Null(SoftwareInventoryAnalyzer.CutAtNul(null!));
+        }
+    }
+}

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Monitoring/EspAndHelloTrackerStarvedAppsTests.cs

@@ -174,7 +174,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring
         [Fact]
         public void Reevaluate_does_not_re_emit_starved_warnings()
         {
-            // sits-d Cloud-PC fix (2026-08-19): the synthesis re-check now runs on EVERY IME
+            // Cloud-PC fix (2026-08-19): the synthesis re-check now runs on EVERY IME
             // app-state transition. It must not turn the one-shot starvation warning into a
             // per-transition stream — the re-check path suppresses the emission entirely
             // (the per-appId dedupe would swallow the duplicates, but walking the probe
@@ -198,7 +198,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring
         [Fact]
         public void Starved_apps_that_settle_later_still_complete_the_enrollment()
         {
-            // The real sits-d shape: the ESP exits with apps still starved (warning emitted),
+            // The real field shape: the ESP exits with apps still starved (warning emitted),
             // the apps then all settle, and the re-check must open the gate — the warning
             // already on the timeline is history, not a permanent veto.
             using var f = new Fixture();

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Monitoring/EspAndHelloTrackerUserAppsSettledSynthesisTests.cs

@@ -172,8 +172,8 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring
         }
 
         // ------------------------------------------------------------------------------
-        // sits-d Cloud-PC fix (2026-08-19) — the synthesis is no longer edge-only.
-        // Sessions 8110e262 / a89aac2d: the ESP page exited while 138 required user-ESP apps
+        // Cloud-PC fix (2026-08-19) — the synthesis is no longer edge-only.
+        // Two field sessions: the ESP page exited while 138 required user-ESP apps
         // were still in flight, they all reached a terminal state (0 failed) minutes later,
         // and because nothing re-checked, the enrollment never completed.
         // ------------------------------------------------------------------------------

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Monitoring/Ime/ImeLogTrackerOverwriteRewindTests.RetryPairing.cs

@@ -0,0 +1,336 @@
+using System;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime;
+using Xunit;
+
+namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.Ime
+{
+    /// <summary>
+    /// B-96m: IME re-runs a failed platform script on later check-ins, so AgentExecutor.log can hold several runs of one
+    /// policy before the tracker has read IME's result of the first — always on the agent's first pass (the agent starts
+    /// mid-enrollment and reads all of AgentExecutor.log before IntuneManagementExtension.log), after a restart, and
+    /// whenever a result line surfaces late. With one slot per policy the second executor start reused the first run's
+    /// slot and its end block overwrote the first one: the first IME result went out with the LAST run's exit code and
+    /// output (session eff1b413: the bootstrap script "Failed (exit 0)" with the stdout of its successful retry), every
+    /// later result without an end block. These tests pin one run per executor start, each IME result paired with the
+    /// run of its policy that started last before it, each run carrying its own end block.
+    /// </summary>
+    public sealed partial class ImeLogTrackerOverwriteRewindTests
+    {
+        private const string RetryPolicyId = "4c2d8e1a-7b3f-4a9e-8d21-6f0b5c3e9a74";
+        private const string RetryUser = "00000000-0000-0000-0000-000000000000";
+
+        private static string ImeEntryAt(string time, string message)
+            => $"<![LOG[{message}]LOG]!><time=\"{time}\" date=\"9-10-2026\" component=\"IntuneManagementExtension\" context=\"\" type=\"1\" thread=\"12\" file=\"\">\r\n";
+
+        /// <summary>One executor run's start block: banner, the platform argument line, paths, launch.</summary>
+        private static string RunStart(string time, string pid, string policyId = RetryPolicyId, string userId = RetryUser)
+        {
+            var path = $@"{ImeDir}\Policies\Scripts\{userId}_{policyId}.ps1";
+            var results = $@"{ImeDir}\Policies\Results\{userId}_{policyId}";
+            return ExecutorBanner(time)
+                + EntryAt(time, $"Adding argument powershell with value {path} to the named argument list.")
+                + EntryAt(time, "Powershell option gets invoked")
+                + EntryAt(time, path)
+                + EntryAt(time, results + ".output")
+                + EntryAt(time, results + ".error")
+                + EntryAt(time, results + ".timeout")
+                + ExecutorLaunch(time, path, pid);
+        }
+
+        /// <summary>
+        /// One executor run's end block in AgentExecutor's order. "error from script =" logs the stderr buffer before the
+        /// output readers finished (<paramref name="stderrSnapshot"/>); "write output done" logs the final texts, the
+        /// error part being exactly the error file IME judges.
+        /// </summary>
+        private static string RunEnd(string time, int exitCode, string stdout, string stderr, string? stderrSnapshot = null)
+            => EntryAt(time, $"Powershell exit code is {exitCode}")
+            + EntryAt(time, $"length of out={stdout.Length}")
+            + EntryAt(time, $"length of error={stderr.Length}")
+            + EntryAt(time, "error from script =" + (stderrSnapshot ?? stderr))
+            + EntryAt(time, exitCode == 0 ? "Powershell script is successfully executed." : "Powershell script is failed to execute")
+            + EntryAt(time, $"write output done. output = {stdout}, error = {stderr}")
+            + EntryAt(time, "Revert Wow64FsRedirection")
+            + EntryAt(time, "Agent executor completed.");
+
+        private static string ImeRunStart(string time, string policyId = RetryPolicyId, string userId = RetryUser)
+            => ImeEntryAt(time, $@"Script file {ImeDir}\Policies\Scripts\{userId}_{policyId}.ps1 is generated.");
+
+        private static string ImeRunResult(string time, string result, string policyId = RetryPolicyId, string userId = RetryUser)
+            => ImeEntryAt(time, $"[PowerShell] User Id = {userId}, Policy id = {policyId}, policy result = {result}");
+
+        private static void AppendImeLog(Harness h, string text)
+            => File.AppendAllText(Path.Combine(Path.GetDirectoryName(h.LogPath)!, "IntuneManagementExtension.log"), text, new UTF8Encoding(false));
+
+        /// <summary>Result | exit | stdout | stderr — readable in an assertion failure; "-" no exit code, "~" never read.</summary>
+        private static string Shape(ScriptExecutionState s)
+            => $"{s.Result}|{(s.ExitCode.HasValue ? s.ExitCode.Value.ToString() : "-")}|{s.Stdout ?? "~"}|{s.Stderr ?? "~"}";
+
+        /// <summary>
+        /// Two poll passes as the agent runs them (read the files, then the flushes), the second past the result hold:
+        /// a result missing its end block goes out by then.
+        /// </summary>
+        private static async Task PassAndSettle(Harness h)
+        {
+            await h.Tracker.RunPollPassAsync(default);
+            h.Now = h.Now.AddSeconds(6);
+            await h.Tracker.RunPollPassAsync(default);
+        }
+
+        [Fact]
+        public async Task First_pass_pairs_each_ime_result_with_the_end_block_of_its_own_run()
+        {
+            using var h = new Harness("AgentExecutor.log", ScriptPatterns());
+            // IME's first run and two retries on later check-ins, all written before the agent started.
+            h.Append(RunStart("12:00:10.0000000", "1001") + RunEnd("12:00:12.0000000", 1, "", "Run A failed")
+                + RunStart("12:10:10.0000000", "1002") + RunEnd("12:10:12.0000000", 1, "Run B output", "")
+                + RunStart("12:20:10.0000000", "1003") + RunEnd("12:20:12.0000000", 0, "Run C output", ""));
+            AppendImeLog(h, ImeRunStart("12:00:08.0000000") + ImeRunResult("12:00:12.1000000", "Failed")
+                + ImeRunStart("12:10:08.0000000") + ImeRunResult("12:10:12.1000000", "Success")
+                + ImeRunStart("12:20:08.0000000") + ImeRunResult("12:20:12.1000000", "Success"));
+
+            await PassAndSettle(h);
+
+            Assert.Equal(new[] { "Failed|1||Run A failed", "Success|1|Run B output|", "Success|0|Run C output|" },
+                h.Completed.Select(Shape).ToArray());
+            Assert.All(h.Completed, s => Assert.Equal("ime_policy_result", s.ResultSource));
+            Assert.True(h.Completed[0].StartedAtUtc < h.Completed[1].StartedAtUtc && h.Completed[1].StartedAtUtc < h.Completed[2].StartedAtUtc);
+            Assert.Equal(3, h.Completed.Select(s => s.RunId).Distinct().Count());
+        }
+
+        [Fact]
+        public async Task Retry_of_the_bootstrap_script_never_lends_its_success_output_to_the_failed_first_attempt()
+        {
+            using var h = new Harness("AgentExecutor.log", ScriptPatterns());
+            h.Append(RunStart("12:00:10.0000000", "2001") + RunEnd("12:00:20.0000000", 1, "attempt 1: download failed", "Invoke-WebRequest : The remote name could not be resolved")
+                + RunStart("12:10:10.0000000", "2002") + RunEnd("12:10:20.0000000", 0, "===== Bootstrap Completed Successfully =====", ""));
+            AppendImeLog(h, ImeRunStart("12:00:08.0000000") + ImeRunResult("12:00:20.1000000", "Failed")
+                + ImeRunStart("12:10:08.0000000") + ImeRunResult("12:10:20.1000000", "Success"));
+
+            await PassAndSettle(h);
+
+            Assert.Equal(new[]
+            {
+                "Failed|1|attempt 1: download failed|Invoke-WebRequest : The remote name could not be resolved",
+                "Success|0|===== Bootstrap Completed Successfully =====|",
+            }, h.Completed.Select(Shape).ToArray());
+        }
+
+        [Fact]
+        public async Task Run_killed_at_the_timeout_reports_failed_without_the_next_runs_end_block()
+        {
+            using var h = new Harness("AgentExecutor.log", ScriptPatterns());
+            // IME killed the first executor after 1800 s: its start block is all AgentExecutor.log holds of it.
+            h.Append(RunStart("12:00:10.0000000", "3001")
+                + RunStart("12:40:10.0000000", "3002") + RunEnd("12:40:12.0000000", 0, "Run B output", ""));
+            AppendImeLog(h, ImeRunStart("12:00:08.0000000") + ImeRunResult("12:30:10.5000000", "Failed")
+                + ImeRunStart("12:40:08.0000000") + ImeRunResult("12:40:12.1000000", "Success"));
+
+            await PassAndSettle(h);
+
+            Assert.Equal(new[] { "Failed|-|~|~", "Success|0|Run B output|" }, h.Completed.Select(Shape).ToArray());
+        }
+
+        [Fact]
+        public async Task Run_whose_result_never_surfaced_falls_back_on_imes_rule_before_the_next_run()
+        {
+            using var h = new Harness("AgentExecutor.log", ScriptPatterns());
+            h.Append(RunStart("12:00:10.0000000", "4001") + RunEnd("12:00:12.0000000", 0, "Run A output", "Run A wrote an error")
+                + RunStart("12:10:10.0000000", "4002") + RunEnd("12:10:12.0000000", 0, "Run B output", ""));
+            // Run A's result line was lost; run B's is there.
+            AppendImeLog(h, ImeRunStart("12:00:08.0000000") + ImeRunStart("12:10:08.0000000") + ImeRunResult("12:10:12.1000000", "Success"));
+
+            await PassAndSettle(h);
+
+            Assert.Equal(new[] { "Failed|0|Run A output|Run A wrote an error", "Success|0|Run B output|" }, h.Completed.Select(Shape).ToArray());
+            Assert.Equal(new[] { "agentexecutor_fallback", "ime_policy_result" }, h.Completed.Select(s => s.ResultSource).ToArray());
+        }
+
+        [Fact]
+        public async Task Run_in_flight_survives_the_emit_of_the_run_before_it()
+        {
+            using var h = new Harness("AgentExecutor.log", ScriptPatterns());
+            h.Append(RunStart("12:00:10.0000000", "5001") + RunEnd("12:00:12.0000000", 0, "Run A output", "")
+                + RunStart("12:10:10.0000000", "5002"));
+            AppendImeLog(h, ImeRunStart("12:00:08.0000000") + ImeRunResult("12:00:12.1000000", "Success") + ImeRunStart("12:10:08.0000000"));
+            await PassAndSettle(h);
+            h.Now = h.Now.AddSeconds(30);
+            await h.Pass();
+
+            // Run B ends minutes later.
+            h.Append(RunEnd("12:10:40.0000000", 0, "Run B output", ""));
+            AppendImeLog(h, ImeRunResult("12:10:40.1000000", "Success"));
+            await PassAndSettle(h);
+
+            Assert.Equal(new[] { "Success|0|Run A output|", "Success|0|Run B output|" }, h.Completed.Select(Shape).ToArray());
+        }
+
+        [Fact]
+        public async Task Shutdown_between_the_two_logs_flushes_each_run_with_its_own_end_block()
+        {
+            using var h = new Harness("AgentExecutor.log", ScriptPatterns());
+            h.Append(RunStart("12:00:10.0000000", "6001") + RunEnd("12:00:12.0000000", 1, "", "Run A failed")
+                + RunStart("12:10:10.0000000", "6002") + RunEnd("12:10:12.0000000", 0, "Run B output", ""));
+            // The pass is cancelled after AgentExecutor.log; the shutdown flush follows.
+            await h.Pass();
+            h.Tracker.FlushPendingPlatformScriptResults(h.Now, force: true);
+
+            h.Restart();
+            AppendImeLog(h, ImeRunStart("12:00:08.0000000") + ImeRunResult("12:00:12.1000000", "Failed")
+                + ImeRunStart("12:10:08.0000000") + ImeRunResult("12:10:12.1000000", "Success"));
+            await PassAndSettle(h);
+
+            // Each run went out with its own block and IME's verdict on it; the results read after the restart are
+            // the same runs and change nothing.
+            Assert.Equal(new[] { "Failed|1||Run A failed", "Success|0|Run B output|" }, h.Completed.Select(Shape).ToArray());
+            Assert.All(h.Completed, s => Assert.Equal("agentexecutor_fallback", s.ResultSource));
+        }
+
+        [Fact]
+        public async Task End_block_line_recovered_after_the_next_run_started_stays_with_its_own_run()
+        {
+            using var h = new Harness("AgentExecutor.log", ScriptPatterns());
+            h.Append(RunStart("12:00:10.0000000", "7001"));
+            var exitLineAt = h.Length;
+            h.Append(RunEnd("12:00:12.0000000", 1, "", "Run A failed")
+                + RunStart("12:10:10.0000000", "7002") + RunEnd("12:10:12.0000000", 0, "Run B output", ""));
+            await h.Pass();
+
+            // A stale writer rewrites run A's exit line in place: the ledger check re-reads it behind run B's start.
+            h.Overwrite(exitLineAt, EntryAt("12:00:12.0000000", "Powershell exit code is 7"));
+            h.Tracker.RequestOverwriteCheckForTest();
+            h.Now = h.Now.AddSeconds(2);
+            await h.Pass();
+
+            AppendImeLog(h, ImeRunStart("12:00:08.0000000") + ImeRunResult("12:00:12.1000000", "Failed")
+                + ImeRunStart("12:10:08.0000000") + ImeRunResult("12:10:12.1000000", "Success"));
+            await PassAndSettle(h);
+
+            Assert.Equal(new[] { "Failed|7||Run A failed", "Success|0|Run B output|" }, h.Completed.Select(Shape).ToArray());
+        }
+
+        [Fact]
+        public async Task Run_without_result_or_end_block_is_dropped_once_a_later_run_has_its_result()
+        {
+            using var h = new Harness("AgentExecutor.log", ScriptPatterns());
+            h.Append(RunStart("12:00:10.0000000", "9001")
+                + RunStart("12:10:10.0000000", "9002") + RunEnd("12:10:12.0000000", 0, "Run B output", ""));
+            AppendImeLog(h, ImeRunStart("12:00:08.0000000") + ImeRunStart("12:10:08.0000000") + ImeRunResult("12:10:12.1000000", "Success"));
+
+            await PassAndSettle(h);
+
+            Assert.Equal(new[] { "Success|0|Run B output|" }, h.Completed.Select(Shape).ToArray());
+            Assert.Equal(0, h.Tracker.ParkedPlatformScriptCountForTest);
+        }
+
+        [Fact]
+        public void Reading_the_same_executor_start_line_again_never_parks_its_run()
+        {
+            using var h = new Harness("AgentExecutor.log", ScriptPatterns());
+            var line = $@"Adding argument powershell with value {ImeDir}\Policies\Scripts\{RetryUser}_{RetryPolicyId}.ps1 to the named argument list.";
+            var at = T0.AddMinutes(-30);
+
+            h.Tracker.ProcessLogMessageForTest(line, at, "AgentExecutor.log");
+            h.Tracker.ProcessLogMessageForTest(line, at, "AgentExecutor.log");
+            Assert.Equal(0, h.Tracker.ParkedPlatformScriptCountForTest);
+
+            h.Tracker.ProcessLogMessageForTest(line, at.AddMinutes(10), "AgentExecutor.log");
+            Assert.Equal(1, h.Tracker.ParkedPlatformScriptCountForTest);
+        }
+
+        [Fact]
+        public async Task Run_without_end_block_keeps_waiting_for_its_result_across_a_shutdown()
+        {
+            using var h = new Harness("AgentExecutor.log", ScriptPatterns());
+            h.Append(RunStart("12:00:10.0000000", "9101") + RunStart("12:40:10.0000000", "9102"));
+            await h.Pass();
+            h.Tracker.FlushPendingPlatformScriptResults(h.Now, force: true);
+            Assert.Empty(h.Completed);
+
+            h.Restart();
+            Assert.Equal(1, h.Tracker.ParkedPlatformScriptCountForTest);
+            AppendImeLog(h, ImeRunStart("12:00:08.0000000") + ImeRunResult("12:30:10.5000000", "Failed"));
+            await PassAndSettle(h);
+
+            Assert.Equal(new[] { "Failed|-|~|~" }, h.Completed.Select(Shape).ToArray());
+        }
+
+        [Fact]
+        public async Task Earlier_run_emitted_while_a_later_one_runs_never_takes_the_later_runs_register_entry()
+        {
+            using var h = new Harness("AgentExecutor.log", ScriptPatterns());
+            h.Append(RunStart("12:00:10.0000000", "9201") + RunEnd("12:00:12.0000000", 1, "", "Run A failed")
+                + RunStart("12:10:10.0000000", "9202"));
+            AppendImeLog(h, ImeRunStart("12:00:08.0000000") + ImeRunResult("12:00:12.1000000", "Failed") + ImeRunStart("12:10:08.0000000"));
+            await PassAndSettle(h);
+            Assert.Single(h.Completed);
+
+            // A save of this key is the latest run's, and that one is still running.
+            h.Tracker.ScriptRuns.NotePassCompleted(h.Now);
+            Assert.Equal(PlatformRunClaim.Wait, h.Tracker.ScriptRuns.TryClaim(RetryUser, RetryPolicyId, h.Now.AddSeconds(-10), out _));
+
+            h.Append(RunEnd("12:10:40.0000000", 0, "Run B output", ""));
+            AppendImeLog(h, ImeRunResult("12:10:40.1000000", "Success"));
+            await PassAndSettle(h);
+            h.Tracker.ScriptRuns.NotePassCompleted(h.Now);
+
+            Assert.Equal(PlatformRunClaim.Claimed, h.Tracker.ScriptRuns.TryClaim(RetryUser, RetryPolicyId, h.Now.AddSeconds(-10), out var run));
+            Assert.Equal(h.Completed[1].RunId, run!.RunId);
+            Assert.Equal("Run B output", run.Stdout);
+        }
+
+        [Fact]
+        public async Task Run_of_another_user_keeps_its_own_register_entry_when_it_waited_for_its_result()
+        {
+            const string otherUser = "2b7e5c91-3d4a-4f80-b6e2-9a1c7d3f5e08";
+            using var h = new Harness("AgentExecutor.log", ScriptPatterns());
+            h.Append(RunStart("12:00:10.0000000", "9301") + RunEnd("12:00:12.0000000", 1, "", "Run A failed")
+                + RunStart("12:10:10.0000000", "9302", userId: otherUser));
+            AppendImeLog(h, ImeRunStart("12:00:08.0000000") + ImeRunResult("12:00:12.1000000", "Failed")
+                + ImeRunStart("12:10:08.0000000", userId: otherUser));
+            await PassAndSettle(h);
+            h.Tracker.ScriptRuns.NotePassCompleted(h.Now);
+
+            Assert.Equal(PlatformRunClaim.Claimed, h.Tracker.ScriptRuns.TryClaim(RetryUser, RetryPolicyId, h.Now.AddSeconds(-10), out var run));
+            Assert.Equal(h.Completed[0].RunId, run!.RunId);
+            Assert.Equal(PlatformRunClaim.Wait, h.Tracker.ScriptRuns.TryClaim(otherUser, RetryPolicyId, h.Now.AddSeconds(-10), out _));
+        }
+
+        [Fact]
+        public async Task Start_line_read_again_stays_a_late_line_after_an_earlier_run_of_another_user_went_out()
+        {
+            const string otherUser = "2b7e5c91-3d4a-4f80-b6e2-9a1c7d3f5e08";
+            using var h = new Harness("AgentExecutor.log", ScriptPatterns());
+            h.Append(RunStart("12:00:10.0000000", "9401") + RunEnd("12:00:12.0000000", 0, "Run A output", "")
+                + RunStart("12:10:10.0000000", "9402", userId: otherUser) + RunEnd("12:10:12.0000000", 0, "Run B output", ""));
+            // Run A's result surfaces after run B's (its line was hidden by a concurrent writer).
+            AppendImeLog(h, ImeRunResult("12:10:12.1000000", "Success", userId: otherUser) + ImeRunResult("12:00:12.1000000", "Success"));
+            await PassAndSettle(h);
+            Assert.Equal(new[] { "Success|0|Run B output|", "Success|0|Run A output|" }, h.Completed.Select(Shape).ToArray());
+
+            // Run B's executor start line read again (a rewind): a late line of the emitted run B, never a new run.
+            var started = 0;
+            h.Tracker.OnScriptStarted = _ => started++;
+            h.Tracker.ProcessLogMessageForTest(
+                $@"Adding argument powershell with value {ImeDir}\Policies\Scripts\{otherUser}_{RetryPolicyId}.ps1 to the named argument list.",
+                h.Completed[0].StartedAtUtc, "AgentExecutor.log");
+            Assert.Equal(0, started);
+        }
+
+        [Fact]
+        public async Task Final_stderr_of_the_end_block_replaces_the_early_snapshot_even_without_stdout()
+        {
+            using var h = new Harness("AgentExecutor.log", ScriptPatterns());
+            // The snapshot was taken before the error reader finished; IME judged the full error file.
+            h.Append(RunStart("12:00:10.0000000", "8001") + RunEnd("12:00:12.0000000", 0, "", "Remove-AppxPackage : Cannot process argument", stderrSnapshot: ""));
+            AppendImeLog(h, ImeRunStart("12:00:08.0000000") + ImeRunResult("12:00:12.1000000", "Failed"));
+
+            await PassAndSettle(h);
+
+            Assert.Equal(new[] { "Failed|0||Remove-AppxPackage : Cannot process argument" }, h.Completed.Select(Shape).ToArray());
+        }
+    }
+}

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Monitoring/Ime/ImeLogTrackerOverwriteRewindTests.RewindFreshness.cs

@@ -0,0 +1,139 @@
+using System;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime;
+using AutopilotMonitor.Agent.V2.Core.SignalAdapters;
+using Xunit;
+
+namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.Ime
+{
+    /// <summary>
+    /// Sessions d29e27e3 and 4377911b: a concurrent IME writer overwrote the result line of a platform script, and the
+    /// overwrite check recovered it one pass later. Recovered lines were never fresh, so they resolved in the agent's own
+    /// cached zone (+60) instead of anchoring themselves (+120): the end stamp landed an hour ahead of the clock and the
+    /// run duration was omitted. Bytes that read differently at a position than at the last look were written after that
+    /// look, so when the replaced bytes were confirmed seconds ago the new line's age is bounded like an appended line's —
+    /// these tests pin that it anchors itself then, and only then.
+    /// </summary>
+    public sealed partial class ImeLogTrackerOverwriteRewindTests
+    {
+        private static void AppendExecutorLog(Harness h, string text)
+            => File.AppendAllText(Path.Combine(Path.GetDirectoryName(h.LogPath)!, "AgentExecutor.log"), text, new UTF8Encoding(false));
+
+        /// <summary>An IME log entry with the byte length of <paramref name="sameLengthAs"/>: what a stale writer's line replaces exactly.</summary>
+        private static string FillerLike(string time, string sameLengthAs)
+        {
+            var bare = ImeEntryAt(time, "[Win32App] checking ");
+            Assert.True(sameLengthAs.Length > bare.Length);
+            return ImeEntryAt(time, "[Win32App] checking " + new string('x', sameLengthAs.Length - bare.Length));
+        }
+
+        /// <summary>
+        /// A platform run whose IME writer lives in +120 (local = UTC + 2 h; the harness clock is 19:30Z): both logs are
+        /// observed empty first, so what follows is read fresh. Returns the IME log position where the filler line sits.
+        /// </summary>
+        private static async Task<long> StartRunAndReadFiller(Harness h, string fillerTime, string resultEntry)
+        {
+            h.Append(string.Empty);
+            AppendExecutorLog(h, string.Empty);
+            await h.Tracker.RunPollPassAsync(default);
+
+            AppendExecutorLog(h, RunStart("21:29:50.0000000", "1001"));
+            h.Append(ImeRunStart("21:29:48.0000000"));
+            await h.Tracker.RunPollPassAsync(default);
+
+            // Another IME writer appends a line; the tracker reads it.
+            var at = h.Length;
+            h.Append(FillerLike(fillerTime, resultEntry));
+            h.Now = h.Now.AddSeconds(1);
+            await h.Tracker.RunPollPassAsync(default);
+            return at;
+        }
+
+        [Fact]
+        public async Task Result_line_recovered_seconds_after_its_bytes_were_read_anchors_itself_like_a_fresh_line()
+        {
+            using var h = new Harness("IntuneManagementExtension.log", ScriptPatterns());
+            var result = ImeRunResult("21:30:01.1000000", "Success");
+            var at = await StartRunAndReadFiller(h, "21:30:00.5000000", result);
+
+            // The script ends: its end block, then the stale IME service writes the result over the filler.
+            AppendExecutorLog(h, RunEnd("21:30:01.0000000", 0, "done", ""));
+            h.Overwrite(at, result);
+            h.Now = h.Now.AddSeconds(1);
+            await PassAndSettle(h);
+
+            Assert.Equal(1, h.Health.OverwriteRewinds);
+            var script = Assert.Single(h.Completed);
+            Assert.Equal(CmTraceOffsetOrigin.LineAnchored, script.ResultProvenance!.Origin);
+            Assert.Equal(120, script.ResultProvenance.OffsetMinutes);
+            Assert.Equal(ImeLogTrackerAdapter.DurationPairVerdict.Verified, ImeLogTrackerAdapter.JudgeDurationPair(
+                script.StartedAtProvenance, script.ResultProvenance, false, script.ResultObservedAtUtc!.Value - script.StartedAtUtc!.Value, out _));
+        }
+
+        [Fact]
+        public async Task Verification_passes_keep_the_replaced_bytes_current_for_a_script_that_runs_longer()
+        {
+            using var h = new Harness("IntuneManagementExtension.log", ScriptPatterns());
+            var result = ImeRunResult("21:30:41.1000000", "Success");
+            var at = await StartRunAndReadFiller(h, "21:30:00.5000000", result);
+
+            // The script runs 40 s; the cadence check verifies the ledger every 10 s while the run is in flight.
+            for (var i = 0; i < 4; i++)
+            {
+                h.Now = h.Now.AddSeconds(10);
+                await h.Tracker.RunPollPassAsync(default);
+            }
+
+            AppendExecutorLog(h, RunEnd("21:30:41.0000000", 0, "done", ""));
+            h.Overwrite(at, result);
+            h.Now = h.Now.AddSeconds(1);
+            await PassAndSettle(h);
+
+            var script = Assert.Single(h.Completed);
+            Assert.Equal(CmTraceOffsetOrigin.LineAnchored, script.ResultProvenance!.Origin);
+            Assert.Equal(120, script.ResultProvenance.OffsetMinutes);
+        }
+
+        [Fact]
+        public async Task Overwrite_does_not_move_the_files_measured_writer_offset()
+        {
+            using var h = new Harness("IntuneManagementExtension.log", ScriptPatterns());
+            var result = ImeRunResult("21:30:01.1000000", "Success");
+            var at = await StartRunAndReadFiller(h, "21:30:00.5000000", result);
+            Assert.True(h.Tracker.OffsetCalibrator.TryGetOffset("IntuneManagementExtension.log", out var before));
+
+            AppendExecutorLog(h, RunEnd("21:30:01.0000000", 0, "done", ""));
+            h.Overwrite(at, result);
+            h.Now = h.Now.AddSeconds(1);
+            await PassAndSettle(h);
+
+            Assert.True(h.Tracker.OffsetCalibrator.TryGetOffset("IntuneManagementExtension.log", out var after));
+            Assert.Equal(before, after);
+        }
+
+        [Theory]
+        // Replaced bytes confirmed 1 s / 30 s ago: written since, age bounded like an appended line's.
+        [InlineData(true, true, 1, true)]
+        [InlineData(true, true, 30, true)]
+        // Confirmed longer ago: the new bytes could be minutes old — their age may round onto the 15-minute grid.
+        [InlineData(true, true, 31, false)]
+        // The clock stepped back since the confirmation: the age is unknown.
+        [InlineData(true, true, -1, false)]
+        // The divergence lies in bytes the ledger never held (dropped by a cap): nothing dates them.
+        [InlineData(true, false, 1, false)]
+        // The pass itself is not fresh — the first pass after a restart never anchors.
+        [InlineData(false, true, 1, false)]
+        // Nothing was replaced.
+        [InlineData(true, true, null, false)]
+        public void Rewound_entry_is_fresh_only_when_the_bytes_it_replaced_were_confirmed_within_the_fresh_window(
+            bool passLinesAreFresh, bool entryAtRewindPointReplaced, int? secondsSinceConfirmed, bool expected)
+        {
+            var now = new DateTime(2026, 10, 4, 19, 2, 0, DateTimeKind.Utc);
+            DateTime? confirmed = secondsSinceConfirmed.HasValue ? now.AddSeconds(-secondsSinceConfirmed.Value) : (DateTime?)null;
+            Assert.Equal(expected, ImeLogTracker.RewoundEntryIsFresh(passLinesAreFresh, entryAtRewindPointReplaced, confirmed, now));
+        }
+    }
+}

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Monitoring/Ime/ImeLogTrackerOverwriteRewindTests.cs

@@ -502,6 +502,10 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.Ime
         public async Task Ime_result_line_hidden_by_an_executor_start_line_is_recovered_from_the_ime_log()
         {
             using var h = new Harness("IntuneManagementExtension.log", ScriptPatterns());
+            // Seen empty first: the start lines are fresh and anchor themselves like the recovered result line will,
+            // so start and result sit on one timeline whatever the host's own zone is.
+            h.Append(string.Empty);
+            await h.Pass();
             h.Append(Entry(GeneratedLine, "17") + Entry("Launch powershell executor in user session", "17") + Entry("process id = 10608", "17"));
             await h.Pass();
             var servicePosition = h.Length;

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Monitoring/Ime/ImeLogTrackerPlatformScriptFallbackTests.cs

@@ -83,8 +83,33 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.Ime
             Assert.Single(emitted);
         }
 
+        [Theory]
+        // IME's verdict is Success exactly when the error file is empty, whatever the exit code. Judged by the exit
+        // code, session 67ae751c showed exit 0 with the script's own stderr as Success, and 46a41a0a an exit 1 without
+        // stderr as Failed, a run IME reported as Success one cycle earlier.
+        [InlineData(0, "Invoke-WebRequest : The remote name could not be resolved", "Failed")]
+        [InlineData(1, "", "Success")]
+        [InlineData(1, "  \n", "Success")]
+        [InlineData(0, "", "Success")]
+        [InlineData(1, null, "Failed")]
+        [InlineData(0, null, "Success")]
+        public void Fallback_judges_like_ime_by_the_stderr_it_read(int exitCode, string? stderr, string expected)
+        {
+            using var tmp = new TempDirectory();
+            var tracker = BuildTracker(tmp, out var emitted);
+            var observedAt = new DateTime(2026, 6, 19, 12, 59, 4, DateTimeKind.Utc);
+
+            tracker.SeedPendingPlatformScriptForTesting("0d2294bf", exitCode: exitCode, exitObservedAtUtc: observedAt, stderr: stderr);
+            tracker.FlushPendingPlatformScriptResults(observedAt.AddSeconds(20));
+
+            var script = Assert.Single(emitted);
+            Assert.Equal(expected, script.Result);
+            Assert.Equal(exitCode, script.ExitCode);
+            Assert.Equal("agentexecutor_fallback", script.ResultSource);
+        }
+
         [Fact]
-        public void Nonzero_exit_code_emits_failed_result()
+        public void Nonzero_exit_code_without_a_stderr_line_emits_failed_result()
         {
             using var tmp = new TempDirectory();
             var tracker = BuildTracker(tmp, out var emitted);

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Monitoring/Ime/ImeLogTrackerScriptStatePersistenceTests.cs

@@ -108,6 +108,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.Ime
 
             var tracker = BuildTracker(tmp, out var emitted);
             tracker.LoadStateForTest(); // must not throw
+            Assert.Equal(0, tracker.ParkedPlatformScriptCountForTest);
 
             // Degrades to pre-fix behavior: no markers restored, normal emission works (the
             // result waits for its end block until the shutdown flush).
@@ -116,6 +117,32 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.Ime
             Assert.Single(emitted);
         }
 
+        [Fact]
+        public void Pending_slot_from_a_state_file_without_executor_start_loads_and_completes()
+        {
+            using var tmp = new TempDirectory();
+            var started = new DateTime(2026, 10, 4, 9, 0, 0, DateTimeKind.Utc);
+
+            // A pending slot written by an agent before runs carried their executor start and run id.
+            var persistence = new ImeTrackerStatePersistence(tmp.Path, new AgentLogger(tmp.Path, AgentLogLevel.Info));
+            persistence.Save(new ImeTrackerStateData
+            {
+                PendingPlatformScripts = new List<ScriptExecutionState>
+                {
+                    new ScriptExecutionState { PolicyId = "policyF", ScriptType = "platform", StartedAtUtc = started, ExitCode = 0, ExitObservedAtUtc = started.AddSeconds(5), Stdout = "done", Stderr = "" },
+                },
+            });
+
+            var tracker = BuildTracker(tmp, out var emitted);
+            tracker.LoadStateForTest();
+            tracker.CompletePlatformScriptFromImeResultForTesting("policyF", "Success", started.AddSeconds(6));
+
+            var script = Assert.Single(emitted);
+            Assert.Equal("Success", script.Result);
+            Assert.Equal(0, script.ExitCode);
+            Assert.False(string.IsNullOrEmpty(script.RunId));
+        }
+
         [Fact]
         public void Stale_result_older_than_current_run_start_is_dropped()
         {

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Monitoring/NetworkFingerprintTests.cs

@@ -0,0 +1,85 @@
+using System.Linq;
+using AutopilotMonitor.Agent.V2.Core.Monitoring;
+using AutopilotMonitor.Agent.V2.Core.Monitoring.Telemetry.Periodic;
+using Xunit;
+
+namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring
+{
+    /// <summary>
+    /// The local network fingerprint a failed registration is stored with: SHA-256 over the
+    /// connection type and gateway <see cref="NetworkChangeDetector"/> captures, cut to 16 hex
+    /// characters; unknown (null) whenever either input is missing. Gateways are documentation
+    /// addresses (RFC 5737).
+    /// </summary>
+    public sealed class NetworkFingerprintTests
+    {
+        private static NetworkChangeDetector.NetworkStateSnapshot State(string? connectionType, string? gateway, bool hasNetwork = true) =>
+            new NetworkChangeDetector.NetworkStateSnapshot
+            {
+                HasNetwork = hasNetwork,
+                ConnectionType = connectionType,
+                Gateway = gateway,
+            };
+
+        [Fact]
+        public void Same_connection_type_and_gateway_give_the_same_short_hex_fingerprint()
+        {
+            var first = NetworkFingerprint.Of(State("WiFi", "192.0.2.1"));
+            var second = NetworkFingerprint.Of(State("WiFi", "192.0.2.1"));
+
+            Assert.Equal(first, second);
+            Assert.Equal(NetworkFingerprint.Length, first!.Length);
+            Assert.True(first.All(c => (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f')), first);
+        }
+
+        [Theory]
+        [InlineData("WiFi", "198.51.100.1")] // another gateway
+        [InlineData("Ethernet", "192.0.2.1")] // another connection type
+        public void Another_gateway_or_connection_type_is_another_network(string connectionType, string gateway)
+        {
+            Assert.NotEqual(
+                NetworkFingerprint.Of(State("WiFi", "192.0.2.1")),
+                NetworkFingerprint.Of(State(connectionType, gateway)));
+        }
+
+        [Fact]
+        public void Unknown_network_has_no_fingerprint()
+        {
+            Assert.Null(NetworkFingerprint.Of(null));
+            Assert.Null(NetworkFingerprint.Of(State("WiFi", "192.0.2.1", hasNetwork: false)));
+            Assert.Null(NetworkFingerprint.Of(State("WiFi", null)));
+            Assert.Null(NetworkFingerprint.Of(State(null, "192.0.2.1")));
+        }
+
+        [Theory]
+        [InlineData("aaaa", "aaaa", false)]
+        [InlineData("aaaa", "bbbb", true)]
+        public void Differs_compares_known_fingerprints(string before, string after, bool expected)
+        {
+            Assert.Equal(expected, NetworkFingerprint.Differs(before, after));
+        }
+
+        [Theory]
+        [InlineData(null, "aaaa")]
+        [InlineData("aaaa", null)]
+        [InlineData(null, null)]
+        public void Differs_is_unknown_when_either_side_is(string? before, string? after)
+        {
+            Assert.Null(NetworkFingerprint.Differs(before, after));
+        }
+
+        [Fact]
+        public void TryCapture_reads_this_machine_without_throwing()
+        {
+            // Machine-dependent: either no active interface (null) or a well-formed fingerprint
+            // that matches the detector's own capture.
+            var captured = NetworkFingerprint.TryCapture();
+
+            if (captured != null)
+            {
+                Assert.Equal(NetworkFingerprint.Length, captured.Length);
+                Assert.Equal(NetworkFingerprint.Of(NetworkChangeDetector.CaptureInterfaceState()), captured);
+            }
+        }
+    }
+}

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Monitoring/Runtime/BootstrapProvenanceReaderTests.cs

@@ -0,0 +1,165 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using AutopilotMonitor.Agent.V2.Core.Monitoring.Runtime;
+using Xunit;
+
+namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.Runtime
+{
+    /// <summary>
+    /// The bootstrap provenance in <c>agent_started</c>. Fixture lines are the scripts' real
+    /// formats: installer <c>[ts] Bootstrap script version: vX.Y</c>
+    /// (Install-AutopilotMonitor.ps1), loader <c>[ts] === Autopilot Monitor bootstrap loader vX.Y
+    /// started (user=..., pid=...) ===</c> (Start-AutopilotMonitor.ps1).
+    /// </summary>
+    public sealed class BootstrapProvenanceReaderTests : IDisposable
+    {
+        private readonly string _dir = Path.Combine(Path.GetTempPath(), "apm-provenance-" + Guid.NewGuid().ToString("N"));
+
+        public BootstrapProvenanceReaderTests() => Directory.CreateDirectory(_dir);
+
+        public void Dispose()
+        {
+            try { Directory.Delete(_dir, recursive: true); } catch { /* best effort */ }
+        }
+
+        private void Write(string name, params string[] lines) =>
+            File.WriteAllText(Path.Combine(_dir, name), string.Join("\r\n", lines) + "\r\n", Encoding.ASCII);
+
+        private static string InstallerRun(string version) => $"[2026-10-13 09:00:00] Bootstrap script version: v{version}";
+
+        private static string LoaderRun(string version) =>
+            $"[2026-10-13 08:59:58] === Autopilot Monitor bootstrap loader v{version} started (user=SECRETUSER, pid=4242) ===";
+
+        [Fact]
+        public void Loader_path_reports_installer_and_loader_versions()
+        {
+            Write(BootstrapProvenanceReader.LoaderLogName, LoaderRun("1.2"), "[2026-10-13 08:59:59] Installer signature verified");
+            Write(BootstrapProvenanceReader.InstallerLogName, "[2026-10-13 09:00:00] ===== Autopilot Monitor Bootstrap Started =====", InstallerRun("2.5"));
+
+            var p = BootstrapProvenanceReader.Read(_dir);
+
+            Assert.True(p.ScriptLogPresent);
+            Assert.Equal("2.5", p.ScriptVersion);
+            Assert.Equal("loader", p.LoaderLog);
+            Assert.Equal("1.2", p.LoaderVersion);
+            Assert.False(p.OobeLogPresent);
+        }
+
+        [Fact]
+        public void The_last_run_wins_when_the_log_grew_over_several_runs()
+        {
+            Write(BootstrapProvenanceReader.InstallerLogName, InstallerRun("2.3"), "x", InstallerRun("2.4"), "y", InstallerRun("2.5"), "z");
+
+            Assert.Equal("2.5", BootstrapProvenanceReader.Read(_dir).ScriptVersion);
+        }
+
+        [Fact]
+        public void A_directly_assigned_installer_has_no_loader_log()
+        {
+            Write(BootstrapProvenanceReader.InstallerLogName, InstallerRun("2.4"));
+
+            var p = BootstrapProvenanceReader.Read(_dir);
+
+            Assert.Equal("2.4", p.ScriptVersion);
+            Assert.Null(p.LoaderLog);
+            Assert.Null(p.LoaderVersion);
+        }
+
+        [Fact]
+        public void An_installer_from_before_the_version_line_is_present_but_without_version()
+        {
+            Write(BootstrapProvenanceReader.InstallerLogName, "[2026-03-01 09:00:00] ===== Autopilot Monitor Bootstrap Started =====");
+
+            var p = BootstrapProvenanceReader.Read(_dir);
+
+            Assert.True(p.ScriptLogPresent);
+            Assert.Null(p.ScriptVersion);
+        }
+
+        [Fact]
+        public void The_msi_loader_log_is_told_apart_from_the_intune_loader()
+        {
+            Write(BootstrapProvenanceReader.MsiLoaderLogName, LoaderRun("1.1"));
+
+            var p = BootstrapProvenanceReader.Read(_dir);
+
+            Assert.Equal("msi", p.LoaderLog);
+            Assert.Equal("1.1", p.LoaderVersion);
+        }
+
+        [Fact]
+        public void With_both_loader_logs_the_most_recently_written_one_counts()
+        {
+            Write(BootstrapProvenanceReader.LoaderLogName, LoaderRun("1.0"));
+            Write(BootstrapProvenanceReader.MsiLoaderLogName, LoaderRun("1.2"));
+            File.SetLastWriteTimeUtc(Path.Combine(_dir, BootstrapProvenanceReader.LoaderLogName), DateTime.UtcNow.AddDays(-3));
+            File.SetLastWriteTimeUtc(Path.Combine(_dir, BootstrapProvenanceReader.MsiLoaderLogName), DateTime.UtcNow.AddMinutes(-1));
+
+            var p = BootstrapProvenanceReader.Read(_dir);
+
+            Assert.Equal("msi", p.LoaderLog);
+            Assert.Equal("1.2", p.LoaderVersion);
+        }
+
+        [Fact]
+        public void The_oobe_go_script_is_recognised_by_its_log()
+        {
+            Write(BootstrapProvenanceReader.OobeLogName, "[2026-10-13 09:00:00] ===== Autopilot Monitor OOBE Bootstrap =====");
+
+            Assert.True(BootstrapProvenanceReader.Read(_dir).OobeLogPresent);
+        }
+
+        [Fact]
+        public void Only_the_tail_of_a_large_log_is_read()
+        {
+            var filler = Enumerable.Repeat(new string('.', 200), 600).ToArray();   // ~120 KB
+            var lines = new List<string> { InstallerRun("2.1") };
+            lines.AddRange(filler);
+            lines.Add(InstallerRun("2.5"));
+            Write(BootstrapProvenanceReader.InstallerLogName, lines.ToArray());
+
+            Assert.Equal("2.5", BootstrapProvenanceReader.Read(_dir).ScriptVersion);
+        }
+
+        [Fact]
+        public void A_missing_directory_reads_as_unknown_and_never_throws()
+        {
+            var p = BootstrapProvenanceReader.Read(Path.Combine(_dir, "does-not-exist"));
+
+            Assert.False(p.ScriptLogPresent);
+            Assert.Null(p.ScriptVersion);
+            Assert.Null(p.LoaderLog);
+            Assert.False(p.OobeLogPresent);
+        }
+
+        [Fact]
+        public void The_event_keys_carry_versions_only_never_the_account_name()
+        {
+            Write(BootstrapProvenanceReader.LoaderLogName, LoaderRun("1.2"));
+            Write(BootstrapProvenanceReader.InstallerLogName, InstallerRun("2.5"));
+            var data = new Dictionary<string, object>();
+
+            BootstrapProvenanceReader.Read(_dir).AddTo(data);
+
+            Assert.Equal(true, data["bootstrapScriptLogPresent"]);
+            Assert.Equal("2.5", data["bootstrapScriptVersion"]);
+            Assert.Equal("loader", data["bootstrapLoaderLog"]);
+            Assert.Equal("1.2", data["bootstrapLoaderVersion"]);
+            Assert.Equal(false, data["oobeBootstrapLogPresent"]);
+            Assert.DoesNotContain(data.Values, v => v is string s && s.Contains("SECRETUSER"));
+        }
+
+        [Fact]
+        public void Keys_that_were_not_found_are_left_out()
+        {
+            var data = new Dictionary<string, object>();
+
+            BootstrapProvenanceReader.Read(_dir).AddTo(data);
+
+            Assert.Equal(new[] { "bootstrapScriptLogPresent", "oobeBootstrapLogPresent" }, data.Keys.OrderBy(k => k).ToArray());
+        }
+    }
+}

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Monitoring/Runtime/SelfUpdaterPayloadCatalogTests.cs

@@ -0,0 +1,101 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using AutopilotMonitor.Agent.V2.Core.Monitoring.Runtime;
+using AutopilotMonitor.Agent.V2.Core.Security;
+using Xunit;
+
+namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.Runtime
+{
+    /// <summary>
+    /// Step 5b of the self-update: the staged payload must match its signed catalog before a
+    /// single file is swapped in. The verifier is replaced through the static hook; each test
+    /// restores it, as in <see cref="SelfUpdaterGracefulShutdownTests"/>.
+    /// </summary>
+    public sealed class SelfUpdaterPayloadCatalogTests : IDisposable
+    {
+        private const string StagingDir = @"C:\ProgramData\AutopilotMonitor\Agent-Update";
+
+        private readonly Func<string, PayloadCatalogVerdict> _savedVerifier;
+        private readonly List<string> _log = new List<string>();
+
+        public SelfUpdaterPayloadCatalogTests()
+        {
+            _savedVerifier = SelfUpdater.VerifyPayloadCatalog;
+        }
+
+        public void Dispose() => SelfUpdater.VerifyPayloadCatalog = _savedVerifier;
+
+        [Fact]
+        public void Production_default_is_the_real_verifier()
+        {
+            Assert.Equal(typeof(PayloadCatalogVerifier), _savedVerifier.Method.DeclaringType);
+            Assert.Equal(nameof(PayloadCatalogVerifier.Verify), _savedVerifier.Method.Name);
+        }
+
+        [Fact]
+        public void Accepted_payload_lets_the_update_continue()
+        {
+            string? checkedDir = null;
+            SelfUpdater.VerifyPayloadCatalog = dir => { checkedDir = dir; return PayloadCatalogVerdict.Accept(); };
+
+            var ok = SelfUpdater.VerifyStagedPayload(StagingDir, _log.Add, out var reason);
+
+            Assert.True(ok);
+            Assert.Null(reason);
+            Assert.Equal(StagingDir, checkedDir);
+            Assert.Contains(_log, line => line.Contains("payload catalog verified"));
+        }
+
+        [Fact]
+        public void Rejected_payload_stops_the_update_and_hands_over_the_reason()
+        {
+            SelfUpdater.VerifyPayloadCatalog = _ =>
+                PayloadCatalogVerdict.Reject("payload differs from catalog (missing: none; extra: evil.dll; changed: none)");
+
+            var ok = SelfUpdater.VerifyStagedPayload(StagingDir, _log.Add, out var reason);
+
+            Assert.False(ok);
+            Assert.Contains("extra: evil.dll", reason);
+            Assert.Contains(_log, line => line.Contains("REJECTED"));
+        }
+
+        [Fact]
+        public void A_throwing_verifier_is_a_rejection_not_a_pass()
+        {
+            SelfUpdater.VerifyPayloadCatalog = _ => throw new InvalidOperationException("runspace broke");
+
+            var ok = SelfUpdater.VerifyStagedPayload(StagingDir, _log.Add, out var reason);
+
+            Assert.False(ok);
+            Assert.Contains("runspace broke", reason);
+        }
+
+        [Fact]
+        public void The_catalog_check_runs_before_any_file_is_swapped()
+        {
+            // Source-level pin: CheckAndApplyUpdateAsync has no seam for the download, so the
+            // ordering that makes the check meaningful is pinned on the source itself.
+            var source = File.ReadAllText(Path.Combine(FindRepoRoot(),
+                "src", "Agent", "AutopilotMonitor.Agent.V2.Core", "Monitoring", "Runtime", "SelfUpdater.cs"));
+
+            var check = source.IndexOf("if (!VerifyStagedPayload(stagingDir, log, out var catalogRejection))", StringComparison.Ordinal);
+            var swap = source.IndexOf("var swapOk = SwapFiles(agentDir, stagingDir, log);", StringComparison.Ordinal);
+
+            Assert.True(check > 0, "step 5b not found in SelfUpdater.cs");
+            Assert.True(swap > check, "SwapFiles must come after the catalog check");
+            Assert.Contains("WriteSkipMarker(\"catalog_rejected\"", source);
+        }
+
+        private static string FindRepoRoot()
+        {
+            var dir = new DirectoryInfo(AppContext.BaseDirectory);
+            while (dir != null && !File.Exists(Path.Combine(dir.FullName, "AutopilotMonitor.sln")))
+            {
+                dir = dir.Parent;
+            }
+            Assert.NotNull(dir);
+            return dir.FullName;
+        }
+    }
+}

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Monitoring/ShellCoreTrackerBreadcrumbTests.cs

@@ -11,6 +11,7 @@ using AutopilotMonitor.Agent.V2.Core.Tests.Orchestration;
 using AutopilotMonitor.DecisionCore.Engine;
 using AutopilotMonitor.DecisionCore.Signals;
 using AutopilotMonitor.Shared;
+using AutopilotMonitor.Shared.Models;
 using Newtonsoft.Json;
 using Xunit;
 
@@ -173,16 +174,16 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring
         public void UpdatePageRecords_ArePageStartsStopsAndNames_OfTheUpdatePageOnly()
         {
             var start = ShellCoreTracker.ParseUpdatePageRecord(ShellCoreTracker.EventId_ShellCore_WebAppStarted, NdupStarted, lastPage: null);
-            Assert.Equal(OobeUpdatePageRecord.PageStarted, start!.CxhEvent);
+            Assert.Equal(OobeUpdateVocabulary.PageStarted, start!.CxhEvent);
             Assert.Equal("OobeNDUP", start.Page);
 
             var stop = ShellCoreTracker.ParseUpdatePageRecord(ShellCoreTracker.EventId_ShellCore_WebAppStopped, PageStopped, lastPage: "RebootNDUP");
-            Assert.Equal(OobeUpdatePageRecord.PageStopped, stop!.CxhEvent);
+            Assert.Equal(OobeUpdateVocabulary.PageStopped, stop!.CxhEvent);
             Assert.Equal("RebootNDUP", stop.Page);
             Assert.Equal("success", stop.Result);
 
             var name = ShellCoreTracker.ParseUpdatePageRecord(ShellCoreTracker.EventId_ShellCore_WebAppEventName, ScanStartedName, lastPage: null);
-            Assert.Equal(OobeUpdatePageRecord.EventName, name!.CxhEvent);
+            Assert.Equal(OobeUpdateVocabulary.EventName, name!.CxhEvent);
             Assert.Equal("ExpeditedUpdate_startWUScanStarted", name.Name);
             Assert.Null(name.Value);
 

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Monitoring/ShellCoreTrackerUpdatePageBackfillTests.cs

@@ -0,0 +1,225 @@
+#nullable enable
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using AutopilotMonitor.Agent.V2.Core.Logging;
+using AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals;
+using AutopilotMonitor.Agent.V2.Core.Orchestration;
+using AutopilotMonitor.Agent.V2.Core.Tests.Harness;
+using AutopilotMonitor.Agent.V2.Core.Tests.Orchestration;
+using AutopilotMonitor.DecisionCore.Engine;
+using AutopilotMonitor.DecisionCore.Signals;
+using AutopilotMonitor.Shared;
+using Xunit;
+
+namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring
+{
+    /// <summary>
+    /// The first run's update page backfill (<see cref="ShellCoreTracker.BackfillUpdatePageTelemetry"/>)
+    /// and the page a stop belongs to across backfill and live records. The first run has no
+    /// replay — its backfill is telemetry and nothing else, so a Hello-wizard start, an ESP exit
+    /// or an ESP failure in the window must not leave the tracker on any rail.
+    /// </summary>
+    public sealed class ShellCoreTrackerUpdatePageBackfillTests : IDisposable
+    {
+        private static readonly DateTime At = new DateTime(2026, 10, 5, 13, 10, 0, DateTimeKind.Utc);
+
+        private const string NdupStarted = "CloudExperienceHost Web App Activity started. CXID: 'OobeNDUP'.";
+        private const string RebootNdupStarted = "CloudExperienceHost Web App Activity started. CXID: 'RebootNDUP'.";
+        private const string AadHelloStarted = "CloudExperienceHost Web App Activity started. CXID: 'AADHello'.";
+        private const string PageStopped = "CloudExperienceHost Web App Activity stopped. Result: 'success'.";
+        private const string DownloadSucceeded =
+            "CloudExperienceHost Web App Event 1. Name: 'SdxWebAppCloudNDUP_processStatusChangeFromHandler_downloadSucceeded'.";
+        private const string EspExit = "CommercialOOBE_ESPProgress_Page_Exiting";
+        private const string EspFailure = "CommercialOOBE_ESPProgress_Failure";
+        private const string WhiteGloveSuccess = "CommercialOOBE_ESPProgress_WhiteGlove_Success";
+
+        private readonly TempDirectory _tmp = new TempDirectory();
+        private readonly FakeSignalIngressSink _sink = new FakeSignalIngressSink();
+        private int _registryReads;
+
+        public void Dispose() => _tmp.Dispose();
+
+        private ShellCoreTracker Build() =>
+            new ShellCoreTracker("S1", "T1",
+                new InformationalEventPost(_sink, new VirtualClock(At)),
+                new AgentLogger(_tmp.Path, AgentLogLevel.Info),
+                helloTracker: null,
+                oobeUpdateRegistryReader: () => { _registryReads++; return Array.Empty<OobeUpdateRegistrySnapshot.KeyState>(); },
+                stateDirectory: Path.Combine(_tmp.Path, "state"));
+
+        private static void Live(ShellCoreTracker tracker, int eventId, string description, DateTime at, long recordId) =>
+            tracker.ProcessEvent(eventId, description, at, "Microsoft-Windows-Shell-Core", isBackfill: false, recordId: recordId);
+
+        private static ShellCoreRecord Record(int eventId, string description, DateTime at, long recordId) =>
+            new ShellCoreRecord(eventId, description, at, recordId);
+
+        private IReadOnlyList<IReadOnlyDictionary<string, object>> Pages() =>
+            _sink.Posted
+                .Where(p => p.Kind == DecisionSignalKind.InformationalEvent
+                    && p.Payload != null
+                    && p.Payload.TryGetValue(SignalPayloadKeys.EventType, out var et)
+                    && et == Constants.EventTypes.OobeUpdatePage)
+                .Select(p => (IReadOnlyDictionary<string, object>)p.TypedPayload!)
+                .ToList();
+
+        // ------------------------------------------------------------ first run ----
+
+        [Fact]
+        public void FirstRunBackfill_ReportsTheUpdatePage_AndNothingElse()
+        {
+            using var tracker = Build();
+            var raised = new List<string>();
+            tracker.HelloWizardStarted += (_, _) => raised.Add("hello");
+            tracker.FinalizingSetupPhaseTriggered += (_, reason) => raised.Add($"finalizing:{reason}");
+            tracker.EspExited += (_, _) => raised.Add("exit");
+            tracker.EspFailureDetected += (_, _) => raised.Add("failure");
+            tracker.WhiteGloveCompleted += (_, _) => raised.Add("whiteglove");
+
+            tracker.ReplayUpdatePageTelemetry(new[]
+            {
+                Record(ShellCoreTracker.EventId_ShellCore_WebAppEvent, EspExit, At.AddMinutes(-41), 95),
+                Record(ShellCoreTracker.EventId_ShellCore_WebAppEvent, EspFailure, At.AddSeconds(-2430), 96),
+                Record(ShellCoreTracker.EventId_ShellCore_WebAppEvent, WhiteGloveSuccess, At.AddSeconds(-2420), 97),
+                Record(ShellCoreTracker.EventId_ShellCore_WebAppStarted, NdupStarted, At.AddMinutes(-40), 100),
+                Record(ShellCoreTracker.EventId_ShellCore_WebAppEventName, DownloadSucceeded, At.AddMinutes(-30), 101),
+                Record(ShellCoreTracker.EventId_ShellCore_WebAppStarted, AadHelloStarted, At.AddMinutes(-2), 110),
+            });
+
+            Assert.Empty(raised);
+            Assert.False(tracker.IsEspExitedForTest);
+            Assert.False(tracker.IsWhiteGloveDetectedForTest);
+            var pages = Pages();
+            Assert.Equal(new object[] { "page_started", "event_name" }, pages.Select(d => d["cxhEvent"]).ToArray());
+            Assert.All(pages, d => Assert.Equal(true, d["backfill"]));
+            // No agent_trace, no ESP or Hello event — only the two page rows.
+            Assert.Equal(2, _sink.Posted.Count);
+            // The registry shows the state now, not at the records' time.
+            Assert.Equal(0, _registryReads);
+        }
+
+        [Fact]
+        public void FirstRunBackfill_KeepsTheEventTimes()
+        {
+            using var tracker = Build();
+
+            tracker.ReplayUpdatePageTelemetry(new[]
+            {
+                Record(ShellCoreTracker.EventId_ShellCore_WebAppStarted, NdupStarted, At.AddMinutes(-40), 100),
+            });
+
+            var posted = Assert.Single(_sink.Posted);
+            Assert.Equal(At.AddMinutes(-40), posted.OccurredAtUtc);
+        }
+
+        [Fact]
+        public void LiveStop_FindsThePageThatStartedBeforeTheAgent()
+        {
+            using var tracker = Build();
+            tracker.ReplayUpdatePageTelemetry(new[]
+            {
+                Record(ShellCoreTracker.EventId_ShellCore_WebAppStarted, NdupStarted, At.AddMinutes(-40), 100),
+            });
+
+            Live(tracker, ShellCoreTracker.EventId_ShellCore_WebAppStopped, PageStopped, At.AddMinutes(5), 120);
+
+            var stop = Pages().Last();
+            Assert.Equal("page_stopped", stop["cxhEvent"]);
+            Assert.Equal("OobeNDUP", stop["page"]);
+            Assert.Equal(false, stop["backfill"]);
+        }
+
+        [Fact]
+        public void SameRecord_FromTheLiveWatcherAndTheFirstRunBackfill_IsReportedOnce()
+        {
+            // The live watcher is armed before the backfill reads, so both can deliver a record.
+            using var tracker = Build();
+            Live(tracker, ShellCoreTracker.EventId_ShellCore_WebAppStarted, NdupStarted, At, 700);
+            tracker.ReplayUpdatePageTelemetry(new[]
+            {
+                Record(ShellCoreTracker.EventId_ShellCore_WebAppStarted, NdupStarted, At, 700),
+            });
+
+            Assert.Single(Pages(), d => (string)d["cxhEvent"] == "page_started");
+        }
+
+        // ---------------------------------------------------- the page of a stop ----
+
+        [Fact]
+        public void ReplayedOlderStart_DoesNotTakeOverTheNextLiveStop()
+        {
+            // A restart replay reads records older than the live watcher's; before, its page start
+            // overwrote the live page and the next live stop was attributed to the old page.
+            using var tracker = Build();
+            Live(tracker, ShellCoreTracker.EventId_ShellCore_WebAppStarted, RebootNdupStarted, At, 900);
+            tracker.ReplayBackfillRecords(new[]
+            {
+                Record(ShellCoreTracker.EventId_ShellCore_WebAppStarted, NdupStarted, At.AddMinutes(-20), 850),
+                Record(ShellCoreTracker.EventId_ShellCore_WebAppEventName, DownloadSucceeded, At.AddMinutes(-19), 851),
+            });
+
+            Live(tracker, ShellCoreTracker.EventId_ShellCore_WebAppStopped, PageStopped, At.AddMinutes(1), 901);
+
+            var stop = Pages().Last();
+            Assert.Equal("page_stopped", stop["cxhEvent"]);
+            Assert.Equal("RebootNDUP", stop["page"]);
+        }
+
+        [Fact]
+        public void BackfilledStop_BelongsToTheStartOfItsOwnBatch()
+        {
+            using var tracker = Build();
+            Live(tracker, ShellCoreTracker.EventId_ShellCore_WebAppStarted, RebootNdupStarted, At, 900);
+
+            tracker.ReplayUpdatePageTelemetry(new[]
+            {
+                Record(ShellCoreTracker.EventId_ShellCore_WebAppStarted, NdupStarted, At.AddMinutes(-20), 850),
+                Record(ShellCoreTracker.EventId_ShellCore_WebAppStopped, PageStopped, At.AddMinutes(-18), 852),
+            });
+
+            var stop = Pages().Last();
+            Assert.Equal("page_stopped", stop["cxhEvent"]);
+            Assert.Equal("OobeNDUP", stop["page"]);
+            Assert.Equal(true, stop["backfill"]);
+        }
+
+        [Fact]
+        public void BackfilledStopWithoutItsStart_IsNotGivenTheLivePage()
+        {
+            using var tracker = Build();
+            Live(tracker, ShellCoreTracker.EventId_ShellCore_WebAppStarted, NdupStarted, At, 900);
+
+            tracker.ReplayUpdatePageTelemetry(new[]
+            {
+                Record(ShellCoreTracker.EventId_ShellCore_WebAppStopped, PageStopped, At.AddMinutes(-18), 852),
+            });
+
+            Assert.DoesNotContain(Pages(), d => (string)d["cxhEvent"] == "page_stopped");
+        }
+
+        [Fact]
+        public void NewerBackfilledStart_MovesTheLivePageForward()
+        {
+            // Records written between arming the watcher and the backfill's read are newer than
+            // the last live start the watcher delivered before them.
+            using var tracker = Build();
+            Live(tracker, ShellCoreTracker.EventId_ShellCore_WebAppStarted, NdupStarted, At, 900);
+            tracker.ReplayUpdatePageTelemetry(new[]
+            {
+                Record(ShellCoreTracker.EventId_ShellCore_WebAppStarted, RebootNdupStarted, At.AddSeconds(30), 905),
+            });
+
+            Live(tracker, ShellCoreTracker.EventId_ShellCore_WebAppStopped, PageStopped, At.AddMinutes(1), 906);
+
+            Assert.Equal("RebootNDUP", Pages().Last()["page"]);
+        }
+
+        [Fact]
+        public void UpdatePageLookback_IsInsideTheReplayClamp()
+        {
+            Assert.Equal(ShellCoreTracker.UpdatePageBackfillLookbackMinutes,
+                ShellCoreTracker.ClampLookbackMinutes(ShellCoreTracker.UpdatePageBackfillLookbackMinutes));
+        }
+    }
+}

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Monitoring/SystemSignals/MdmRebootPolicyTrackerTests.cs

@@ -64,7 +64,6 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.SystemSignals
         private void Buffer(string? rebootUri, long? recordId = null, bool isBackfill = false, DateTime? timeCreatedUtc = null, string? description = null)
         {
             _tracker.ProcessEvent(
-                eventId: MdmRebootPolicyTracker.EventId_PolicyRebootRequired,
                 recordId: recordId ?? _nextRecordId++,
                 timeCreatedUtc: timeCreatedUtc ?? At,
                 rebootUri: rebootUri,
@@ -226,13 +225,13 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.SystemSignals
             // The coalesced reboot restarts the agent; the post-reboot backfill re-reads the same
             // records — a FLUSHED record must be skipped by the next instance.
             var first = MakeTracker(stateDirectory: _tmp.Path);
-            first.ProcessEvent(MdmRebootPolicyTracker.EventId_PolicyRebootRequired, recordId: 500,
+            first.ProcessEvent(recordId: 500,
                 timeCreatedUtc: At, rebootUri: UriSvchost, formattedDescription: null, isBackfill: false);
             first.FlushPending();
 
             var second = MakeTracker(stateDirectory: _tmp.Path);
             second.LoadWatermark();
-            second.ProcessEvent(MdmRebootPolicyTracker.EventId_PolicyRebootRequired, recordId: 500,
+            second.ProcessEvent(recordId: 500,
                 timeCreatedUtc: At, rebootUri: UriSvchost, formattedDescription: null, isBackfill: true);
             second.FlushPending();
 
@@ -245,13 +244,13 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.SystemSignals
             // Process killed by the very reboot the records announce: nothing was flushed, so the
             // next instance must re-read and emit the records.
             var first = MakeTracker(stateDirectory: _tmp.Path);
-            first.ProcessEvent(MdmRebootPolicyTracker.EventId_PolicyRebootRequired, recordId: 500,
+            first.ProcessEvent(recordId: 500,
                 timeCreatedUtc: At, rebootUri: UriSvchost, formattedDescription: null, isBackfill: false);
             // no FlushPending — simulated reboot kill
 
             var second = MakeTracker(stateDirectory: _tmp.Path);
             second.LoadWatermark();
-            second.ProcessEvent(MdmRebootPolicyTracker.EventId_PolicyRebootRequired, recordId: 500,
+            second.ProcessEvent(recordId: 500,
                 timeCreatedUtc: At, rebootUri: UriSvchost, formattedDescription: null, isBackfill: true);
             second.FlushPending();
 

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Monitoring/SystemSignals/OobeUpdateTelemetryTests.cs

@@ -10,6 +10,7 @@ using AutopilotMonitor.Agent.V2.Core.Tests.Orchestration;
 using AutopilotMonitor.DecisionCore.Engine;
 using AutopilotMonitor.DecisionCore.Signals;
 using AutopilotMonitor.Shared;
+using AutopilotMonitor.Shared.Models;
 using Xunit;
 
 namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.SystemSignals
@@ -56,7 +57,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.SystemSignals
         public void Page_IsReported_WithItsEventTime_AndFields()
         {
             Build().ReportPage(
-                new OobeUpdatePageRecord(OobeUpdatePageRecord.PageStopped, 62405, page: "OobeNDUP", result: "success"),
+                new OobeUpdatePageRecord(OobeUpdateVocabulary.PageStopped, 62405, page: "OobeNDUP", result: "success"),
                 At.AddMinutes(-3), isBackfill: true);
 
             var page = Assert.Single(ByType(Constants.EventTypes.OobeUpdatePage));
@@ -75,7 +76,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.SystemSignals
         public void EventName_CarriesItsSafeValue()
         {
             Build().ReportPage(
-                new OobeUpdatePageRecord(OobeUpdatePageRecord.EventName, 62407, name: "ExpeditedUpdate_isNDUPAllowedByCSPSucceeded", value: "true"),
+                new OobeUpdatePageRecord(OobeUpdateVocabulary.EventName, 62407, name: "ExpeditedUpdate_isNDUPAllowedByCSPSucceeded", value: "true"),
                 At, isBackfill: false);
 
             var data = Data(Assert.Single(ByType(Constants.EventTypes.OobeUpdatePage)));
@@ -89,9 +90,9 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.SystemSignals
             var telemetry = Build();
             for (var i = 0; i < 10; i++)
             {
-                telemetry.ReportPage(new OobeUpdatePageRecord(OobeUpdatePageRecord.EventName, 62406, name: "ExpeditedUpdate_progress"), At.AddSeconds(i), isBackfill: false);
+                telemetry.ReportPage(new OobeUpdatePageRecord(OobeUpdateVocabulary.EventName, 62406, name: "ExpeditedUpdate_progress"), At.AddSeconds(i), isBackfill: false);
             }
-            telemetry.ReportPage(new OobeUpdatePageRecord(OobeUpdatePageRecord.PageStopped, 62405, page: "OobeNDUP", result: "success"), At.AddMinutes(1), isBackfill: false);
+            telemetry.ReportPage(new OobeUpdatePageRecord(OobeUpdateVocabulary.PageStopped, 62405, page: "OobeNDUP", result: "success"), At.AddMinutes(1), isBackfill: false);
 
             var pages = ByType(Constants.EventTypes.OobeUpdatePage);
             Assert.Equal(OobeUpdateTelemetry.MaxPageEventsPerKey + 1, pages.Count);
@@ -101,15 +102,41 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.SystemSignals
         }
 
         [Fact]
-        public void PageEvents_AreCappedPerRun()
+        public void PageEvents_AreCappedPerRun_AndTheCapIsMarkedOnce()
         {
             var telemetry = Build();
             for (var i = 0; i < OobeUpdateTelemetry.MaxPageEventsPerRun + 20; i++)
             {
-                telemetry.ReportPage(new OobeUpdatePageRecord(OobeUpdatePageRecord.EventName, 62406, name: $"ExpeditedUpdate_step{i}"), At, isBackfill: false);
+                telemetry.ReportPage(new OobeUpdatePageRecord(OobeUpdateVocabulary.EventName, 62406, name: $"ExpeditedUpdate_step{i}"), At.AddSeconds(i), isBackfill: false);
             }
 
-            Assert.Equal(OobeUpdateTelemetry.MaxPageEventsPerRun, ByType(Constants.EventTypes.OobeUpdatePage).Count);
+            var pages = ByType(Constants.EventTypes.OobeUpdatePage);
+            Assert.Equal(OobeUpdateTelemetry.MaxPageEventsPerRun + 1, pages.Count);
+            // A name missing after the marker proves nothing — the rules check for it.
+            var marker = Data(pages.Last());
+            Assert.Equal(OobeUpdateVocabulary.NamesCapped, marker["cxhEvent"]);
+            Assert.Equal(false, marker["backfill"]);
+            Assert.Equal(OobeUpdateTelemetry.MaxPageEventsPerRun, marker["limit"]);
+            Assert.Equal(At.AddSeconds(OobeUpdateTelemetry.MaxPageEventsPerRun), pages.Last().OccurredAtUtc); // the first name over the budget
+        }
+
+        [Fact]
+        public void BackfilledNames_HaveTheirOwnBudget()
+        {
+            // The records from before the agent started cannot spend the live page's budget.
+            var telemetry = Build();
+            for (var i = 0; i < OobeUpdateTelemetry.MaxBackfillPageEventsPerRun + 5; i++)
+            {
+                telemetry.ReportPage(new OobeUpdatePageRecord(OobeUpdateVocabulary.EventName, 62406, name: $"ExpeditedUpdate_old{i}"), At.AddMinutes(-30), isBackfill: true);
+            }
+
+            Assert.True(telemetry.ReportPage(new OobeUpdatePageRecord(OobeUpdateVocabulary.EventName, 62406, name: "ExpeditedUpdate_live"), At, isBackfill: false));
+
+            var markers = ByType(Constants.EventTypes.OobeUpdatePage)
+                .Where(p => (string)Data(p)["cxhEvent"] == OobeUpdateVocabulary.NamesCapped).ToList();
+            var marker = Assert.Single(markers);
+            Assert.Equal(true, Data(marker)["backfill"]);
+            Assert.Equal(OobeUpdateTelemetry.MaxBackfillPageEventsPerRun, Data(marker)["limit"]);
         }
 
         [Fact]
@@ -119,16 +146,17 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.SystemSignals
             var telemetry = Build();
             for (var i = 0; i < OobeUpdateTelemetry.MaxPageEventsPerRun; i++)
             {
-                Assert.True(telemetry.ReportPage(new OobeUpdatePageRecord(OobeUpdatePageRecord.EventName, 62406, name: $"ExpeditedUpdate_step{i}"), At, isBackfill: false));
+                Assert.True(telemetry.ReportPage(new OobeUpdatePageRecord(OobeUpdateVocabulary.EventName, 62406, name: $"ExpeditedUpdate_step{i}"), At, isBackfill: false));
             }
 
-            Assert.False(telemetry.ReportPage(new OobeUpdatePageRecord(OobeUpdatePageRecord.EventName, 62406, name: "ExpeditedUpdate_late"), At, isBackfill: false));
-            Assert.True(telemetry.ReportPage(new OobeUpdatePageRecord(OobeUpdatePageRecord.PageStarted, 62404, page: "RebootNDUP"), At.AddMinutes(1), isBackfill: false));
-            Assert.True(telemetry.ReportPage(new OobeUpdatePageRecord(OobeUpdatePageRecord.PageStopped, 62405, page: "RebootNDUP", result: "success"), At.AddMinutes(2), isBackfill: false));
+            Assert.False(telemetry.ReportPage(new OobeUpdatePageRecord(OobeUpdateVocabulary.EventName, 62406, name: "ExpeditedUpdate_late"), At, isBackfill: false));
+            Assert.False(telemetry.ReportPage(new OobeUpdatePageRecord(OobeUpdateVocabulary.EventName, 62406, name: "ExpeditedUpdate_later"), At, isBackfill: false));
+            Assert.True(telemetry.ReportPage(new OobeUpdatePageRecord(OobeUpdateVocabulary.PageStarted, 62404, page: "RebootNDUP"), At.AddMinutes(1), isBackfill: false));
+            Assert.True(telemetry.ReportPage(new OobeUpdatePageRecord(OobeUpdateVocabulary.PageStopped, 62405, page: "RebootNDUP", result: "success"), At.AddMinutes(2), isBackfill: false));
 
             var pages = ByType(Constants.EventTypes.OobeUpdatePage);
-            Assert.Equal(OobeUpdateTelemetry.MaxPageEventsPerRun + 2, pages.Count);
-            Assert.Equal(new object[] { "page_started", "page_stopped" },
+            Assert.Equal(OobeUpdateTelemetry.MaxPageEventsPerRun + 3, pages.Count);
+            Assert.Equal(new object[] { OobeUpdateVocabulary.NamesCapped, "page_started", "page_stopped" },
                 pages.Skip(OobeUpdateTelemetry.MaxPageEventsPerRun).Select(p => Data(p)["cxhEvent"]).ToArray());
         }
 
@@ -138,7 +166,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.SystemSignals
             // Outside the run budget, but a page that restarts in a loop still cannot flood.
             var telemetry = Build();
             var reported = Enumerable.Range(0, 10)
-                .Count(i => telemetry.ReportPage(new OobeUpdatePageRecord(OobeUpdatePageRecord.PageStarted, 62404, page: "OobeNDUP"), At.AddMinutes(i), isBackfill: false));
+                .Count(i => telemetry.ReportPage(new OobeUpdatePageRecord(OobeUpdateVocabulary.PageStarted, 62404, page: "OobeNDUP"), At.AddMinutes(i), isBackfill: false));
 
             Assert.Equal(OobeUpdateTelemetry.MaxPageEventsPerKey, reported);
         }

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Monitoring/Transport/EmergencyReporterTests.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Net.Http;
 using System.Threading.Tasks;
 using AutopilotMonitor.Agent.V2.Core.Monitoring.Transport;
+using AutopilotMonitor.Agent.V2.Core.Tests.Harness;
 using AutopilotMonitor.Shared.Models;
 using Xunit;
 
@@ -49,6 +50,74 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.Transport
         private static EmergencyReporter Reporter(FakeApiClient client)
             => new EmergencyReporter(client, "session", "tenant", "0.0.0", logger: null);
 
+        private static EmergencyReporter Reporter(FakeApiClient client, VirtualClock clock)
+            => new EmergencyReporter(client, "session", "tenant", "0.0.0", logger: null, clock: clock);
+
+        private static VirtualClock Clock() => new VirtualClock(new DateTime(2026, 10, 9, 10, 0, 0, DateTimeKind.Utc));
+
+        [Fact]
+        public async Task Session_unknown_report_is_not_suppressed_by_the_cooldown_of_an_earlier_report()
+        {
+            // Terminal report, sent at most once per process right before the termination — a
+            // routine report one minute earlier must not cost it. Every other type keeps the cooldown.
+            var clock = Clock();
+            var client = new FakeApiClient();
+            client.Results.Enqueue(true);
+            client.Results.Enqueue(true);
+            client.Results.Enqueue(true);
+            var reporter = Reporter(client, clock);
+
+            await reporter.TrySendAsync(AgentErrorType.IngestFailed, "m", httpStatusCode: 503);
+            clock.Advance(TimeSpan.FromMinutes(1));
+            await reporter.TrySendAsync(AgentErrorType.TelemetryRejectedSessionUnknown, "m", httpStatusCode: 410);
+
+            Assert.Equal(2, client.Calls);
+            Assert.Equal(AgentErrorType.TelemetryRejectedSessionUnknown, client.Reports[1].ErrorType);
+
+            // Control: a third report of another type inside the window is still held back.
+            clock.Advance(TimeSpan.FromMinutes(1));
+            await reporter.TrySendAsync(AgentErrorType.ConfigFetchFailed, "m");
+            Assert.Equal(2, client.Calls);
+        }
+
+        [Fact]
+        public async Task Second_session_unknown_report_within_the_window_is_still_suppressed()
+        {
+            var clock = Clock();
+            var client = new FakeApiClient();
+            client.Results.Enqueue(true);
+            client.Results.Enqueue(true);
+            var reporter = Reporter(client, clock);
+
+            await reporter.TrySendAsync(AgentErrorType.TelemetryRejectedSessionUnknown, "m", httpStatusCode: 410);
+            clock.Advance(TimeSpan.FromMinutes(1));
+            await reporter.TrySendAsync(AgentErrorType.TelemetryRejectedSessionUnknown, "m", httpStatusCode: 410);
+
+            Assert.Equal(1, client.Calls);
+        }
+
+        [Fact]
+        public async Task Session_unknown_report_still_counts_against_the_per_session_maximum()
+        {
+            // Five delivered reports (ten minutes apart, distinct keys) exhaust the budget; the
+            // exemption waives only the cooldown, not the maximum.
+            var clock = Clock();
+            var client = new FakeApiClient();
+            for (var i = 0; i < 6; i++) client.Results.Enqueue(true);
+            var reporter = Reporter(client, clock);
+
+            foreach (var status in new[] { 500, 502, 503, 504, 429 })
+            {
+                await reporter.TrySendAsync(AgentErrorType.IngestFailed, "m", httpStatusCode: status);
+                clock.Advance(TimeSpan.FromMinutes(10));
+            }
+            Assert.Equal(5, client.Calls);
+
+            await reporter.TrySendAsync(AgentErrorType.TelemetryRejectedSessionUnknown, "m", httpStatusCode: 410);
+
+            Assert.Equal(5, client.Calls);
+        }
+
         [Fact]
         public async Task Failed_send_rolls_back_reservation_so_a_later_call_retries()
         {
@@ -142,6 +211,20 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.Transport
             Assert.Equal(2, client.Calls);
         }
 
+        [Fact]
+        public async Task Session_unknown_report_carries_error_type_and_http_410()
+        {
+            var client = new FakeApiClient();
+            client.Results.Enqueue(true);
+            var reporter = Reporter(client);
+
+            await reporter.TrySendAsync(AgentErrorType.TelemetryRejectedSessionUnknown, "m", httpStatusCode: 410);
+
+            var report = Assert.Single(client.Reports);
+            Assert.Equal(AgentErrorType.TelemetryRejectedSessionUnknown, report.ErrorType);
+            Assert.Equal(410, report.HttpStatusCode);
+        }
+
         [Fact]
         public async Task Session_age_is_carried_in_the_report_and_absent_by_default()
         {

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Orchestration/DefaultComponentFactoryOrderingTests.cs

@@ -145,7 +145,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Orchestration
         [Fact]
         public void Ime_app_state_callback_is_chained_into_the_user_apps_settled_recheck()
         {
-            // sits-d Cloud-PC fix (2026-08-19): the AccountSetup synthesis is re-evaluated on every
+            // Cloud-PC fix (2026-08-19): the AccountSetup synthesis is re-evaluated on every
             // terminal IME app transition, which only works while the factory keeps this chain
             // wired. It is five lines that a refactor can drop silently and whose absence costs a
             // whole class of sessions their completion — so pin it here.

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Orchestration/EnrollmentOrchestratorInterceptionTests.cs

@@ -0,0 +1,132 @@
+#nullable enable
+using System;
+using System.Globalization;
+using System.IO;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using AutopilotMonitor.Agent.V2.Core.Orchestration;
+using AutopilotMonitor.Agent.V2.Core.Tests.Harness;
+using AutopilotMonitor.Agent.V2.Core.Tests.Transport;
+using AutopilotMonitor.Agent.V2.Core.Transport.Telemetry;
+using AutopilotMonitor.Shared.Models;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+using Xunit;
+
+namespace AutopilotMonitor.Agent.V2.Core.Tests.Orchestration
+{
+    /// <summary>
+    /// The orchestrator side of an intercepted upload: one <c>telemetry_upload_blocked</c> with the
+    /// evidence (queued behind the intercepted batch, never uploaded while paused), and the one
+    /// terminal attempt — requested by <c>DrainSpool</c> or made by <see cref="EnrollmentOrchestrator.Stop"/>.
+    /// </summary>
+    [Collection("SerialThreading")]
+    public sealed class EnrollmentOrchestratorInterceptionTests
+    {
+        private const int WaitMs = 10_000;
+
+        private static TelemetryItemDraft Draft() =>
+            new TelemetryItemDraft(
+                kind: TelemetryItemKind.Event,
+                partitionKey: "T1_S1",
+                rowKey: "0000000001",
+                payloadJson: "{}",
+                isSessionScoped: true,
+                requiresImmediateFlush: false);
+
+        // The signal and the decision transition of the same post mention the event type too.
+        private static bool IsBlockedEvent(TelemetryItem item) =>
+            item.Kind == TelemetryItemKind.Event
+            && item.PayloadJson.Contains(AutopilotMonitor.Shared.Constants.EventTypes.TelemetryUploadBlocked);
+
+        private static TelemetryItem? FindBlockedEvent(EnrollmentOrchestrator sut) =>
+            sut.SpoolForTests!.Peek(1000).FirstOrDefault(IsBlockedEvent);
+
+        // Dates stay strings: the wire format of firstBlockedAtUtc is what is under test.
+        private static JObject Parse(string json)
+        {
+            using var reader = new JsonTextReader(new StringReader(json)) { DateParseHandling = DateParseHandling.None };
+            return JObject.Load(reader);
+        }
+
+        /// <summary>Starts the orchestrator and drives the first upload into an interception.</summary>
+        private static async Task<EnrollmentOrchestrator> StartInterceptedAsync(EnrollmentOrchestratorRig rig)
+        {
+            rig.Uploader.QueueIntercepted(5);
+            var sut = rig.Build();
+            sut.Start();
+            sut.SpoolForTests!.Enqueue(Draft());
+            await sut.DrainAsync();
+            Assert.True(sut.Transport.IsInterceptionPaused);
+            return sut;
+        }
+
+        [Fact]
+        public async Task Interception_queues_one_telemetry_upload_blocked_with_the_evidence_and_wakeups_stay_offline()
+        {
+            using var rig = new EnrollmentOrchestratorRig();
+            var sut = await StartInterceptedAsync(rig);
+            try
+            {
+                TelemetryItem? blocked = null;
+                Assert.True(SpinWait.SpinUntil(() => (blocked = FindBlockedEvent(sut)) != null, WaitMs),
+                    "telemetry_upload_blocked never reached the spool.");
+                var calls = rig.Uploader.CallCount;
+
+                var data = (JObject)Parse(blocked!.PayloadJson)["Data"]!;
+                Assert.Equal(
+                    new[] { "firstBlockedAtUtc", "operation", "pageTitle", "reason", "serverCertIssuer", "statusCode" },
+                    data.Properties().Select(p => p.Name).OrderBy(n => n, StringComparer.Ordinal));
+                Assert.Equal("client_certificate_required", (string?)data["reason"]);
+                Assert.Equal("agent/telemetry", (string?)data["operation"]);
+                Assert.Equal(JTokenType.Integer, data["statusCode"]!.Type);
+                Assert.Equal(403, (int)data["statusCode"]!);
+                Assert.Equal(InterceptionFixtures.PlatformPageTitle, (string?)data["pageTitle"]);
+                Assert.Equal(InterceptionFixtures.InspectionIssuer, (string?)data["serverCertIssuer"]);
+                Assert.Equal(
+                    EnrollmentOrchestratorRig.DefaultClockStart.ToString("o", CultureInfo.InvariantCulture),
+                    (string?)data["firstBlockedAtUtc"]);
+
+                // The marker was an immediate-upload item; neither its wakeup nor a further drain
+                // touches the network while the pause holds.
+                var drain = await sut.DrainAsync();
+                Assert.Contains("upload intercepted", drain.LastErrorReason);
+                Assert.Equal(calls, rig.Uploader.CallCount);
+                Assert.Single(sut.SpoolForTests!.Peek(1000), IsBlockedEvent);
+            }
+            finally
+            {
+                sut.Stop();
+            }
+        }
+
+        [Fact]
+        public async Task Terminal_attempt_requested_by_the_termination_runs_once_and_Stop_adds_none()
+        {
+            using var rig = new EnrollmentOrchestratorRig();
+            var sut = await StartInterceptedAsync(rig);
+            Assert.True(SpinWait.SpinUntil(() => FindBlockedEvent(sut) != null, WaitMs));
+            var calls = rig.Uploader.CallCount;
+
+            sut.RequestTerminalUploadAttempt();
+            Assert.True(SpinWait.SpinUntil(() => rig.Uploader.CallCount == calls + 1, WaitMs),
+                "the woken drain loop did not make the terminal attempt.");
+
+            sut.Stop();
+            Assert.Equal(calls + 1, rig.Uploader.CallCount);
+        }
+
+        [Fact]
+        public async Task Stop_makes_the_one_terminal_attempt_when_the_termination_did_not()
+        {
+            using var rig = new EnrollmentOrchestratorRig();
+            var sut = await StartInterceptedAsync(rig);
+            var calls = rig.Uploader.CallCount;
+
+            sut.Stop();
+
+            Assert.Equal(calls + 1, rig.Uploader.CallCount);
+        }
+    }
+}

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Orchestration/MtlsHttpClientFactoryTests.cs

@@ -2,6 +2,7 @@ using System;
 using System.Linq;
 using System.Net;
 using System.Net.Http;
+using System.Net.Security;
 using System.Reflection;
 using System.Security.Cryptography;
 using System.Security.Cryptography.X509Certificates;
@@ -10,6 +11,7 @@ using AutopilotMonitor.Agent.V2.Core.Monitoring.Transport;
 using AutopilotMonitor.Agent.V2.Core.Orchestration;
 using AutopilotMonitor.Agent.V2.Core.Security;
 using AutopilotMonitor.Agent.V2.Core.Tests.Harness;
+using AutopilotMonitor.Agent.V2.Core.Transport;
 using Xunit;
 
 namespace AutopilotMonitor.Agent.V2.Core.Tests.Orchestration
@@ -96,6 +98,35 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Orchestration
             Assert.Equal(TimeSpan.FromSeconds(5), client.Timeout);
         }
 
+        [Fact]
+        public void CreateHandler_without_observer_keeps_the_default_validation()
+        {
+            using var tmp = new TempDirectory();
+            var logger = new AgentLogger(tmp.Path, AgentLogLevel.Info);
+            using var cert = CreateSelfSignedCert();
+
+            using var handler = MtlsHttpClientFactory.CreateHandler(new FakeCertificateResolver(cert), logger);
+
+            Assert.Null(handler.ServerCertificateCustomValidationCallback);
+        }
+
+        [Fact]
+        public void CreateHandler_with_observer_installs_an_observing_callback_that_never_weakens_validation()
+        {
+            using var tmp = new TempDirectory();
+            var logger = new AgentLogger(tmp.Path, AgentLogLevel.Info);
+            using var cert = CreateSelfSignedCert();
+            var observer = new ServerCertificateObserver();
+
+            using var handler = MtlsHttpClientFactory.CreateHandler(new FakeCertificateResolver(cert), logger, observer);
+            var callback = handler.ServerCertificateCustomValidationCallback;
+
+            Assert.NotNull(callback);
+            Assert.False(callback!(null!, cert, null!, SslPolicyErrors.RemoteCertificateChainErrors));
+            Assert.True(callback(null!, cert, null!, SslPolicyErrors.None));
+            Assert.Equal(cert.Issuer, observer.LastIssuer);
+        }
+
         [Fact]
         public void CreateHandler_throws_when_resolver_returns_null()
         {
@@ -161,7 +192,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Orchestration
         /// we scan the type hierarchy for the first <see cref="HttpMessageHandler"/>-typed
         /// instance field to stay version-tolerant.
         /// </summary>
-        private static HttpMessageHandler GetPipelineHead(HttpClient client)
+        internal static HttpMessageHandler GetPipelineHead(HttpClient client)
         {
             const BindingFlags flags = BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public;
             for (var t = (Type?)client.GetType(); t != null; t = t.BaseType)

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Orchestration/UserEspKeepAwakeHostTests.cs

@@ -77,7 +77,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Orchestration
             using var ing = BuildIngress(clock);
             var api = new FakeKeepAwakeApi();
             var controller = new KeepAwakeController(NewLogger(), api);
-            var host = new UserEspKeepAwakeHost("S1", "T1", ing, clock, NewLogger(), controller: controller, espTimeoutProvider: () => null);
+            var host = new UserEspKeepAwakeHost(ing, clock, NewLogger(), controller: controller, espTimeoutProvider: () => null);
 
             ing.Start();
             host.Start();
@@ -98,7 +98,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Orchestration
             using var ing = BuildIngress(clock);
             var api = new FakeKeepAwakeApi();
             var controller = new KeepAwakeController(NewLogger(), api);
-            var host = new UserEspKeepAwakeHost("S1", "T1", ing, clock, NewLogger(), controller: controller, espTimeoutProvider: () => null);
+            var host = new UserEspKeepAwakeHost(ing, clock, NewLogger(), controller: controller, espTimeoutProvider: () => null);
 
             ing.Start();
             host.Start();
@@ -127,7 +127,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Orchestration
             var api = new FakeKeepAwakeApi();
             var controller = new KeepAwakeController(NewLogger(), api);
             var progress = false;
-            var host = new UserEspKeepAwakeHost("S1", "T1", ing, clock, NewLogger(), controller: controller,
+            var host = new UserEspKeepAwakeHost(ing, clock, NewLogger(), controller: controller,
                 espTimeoutProvider: () => null, accountSetupProgressProbe: () => Volatile.Read(ref progress));
 
             ing.Start();
@@ -156,7 +156,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Orchestration
             var api = new FakeKeepAwakeApi();
             var controller = new KeepAwakeController(NewLogger(), api);
             var progress = false;
-            var host = new UserEspKeepAwakeHost("S1", "T1", ing, clock, NewLogger(), controller: controller,
+            var host = new UserEspKeepAwakeHost(ing, clock, NewLogger(), controller: controller,
                 espTimeoutProvider: () => null, accountSetupProgressProbe: () => Volatile.Read(ref progress));
 
             ing.Start();
@@ -186,7 +186,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Orchestration
             using var ing = BuildIngress(clock);
             var api = new FakeKeepAwakeApi();
             var controller = new KeepAwakeController(NewLogger(), api);
-            var host = new UserEspKeepAwakeHost("S1", "T1", ing, clock, NewLogger(), controller: controller,
+            var host = new UserEspKeepAwakeHost(ing, clock, NewLogger(), controller: controller,
                 espTimeoutProvider: () => null, accountSetupProgressProbe: () => true);
 
             ing.Start();
@@ -212,7 +212,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Orchestration
             using var ing = BuildIngress(clock);
             var api = new FakeKeepAwakeApi();
             var controller = new KeepAwakeController(NewLogger(), api);
-            var host = new UserEspKeepAwakeHost("S1", "T1", ing, clock, NewLogger(), controller: controller,
+            var host = new UserEspKeepAwakeHost(ing, clock, NewLogger(), controller: controller,
                 espTimeoutProvider: () => null, accountSetupProgressProbe: () => true);
 
             ing.Start();
@@ -236,7 +236,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Orchestration
             using var ing = BuildIngress(clock);
             var api = new FakeKeepAwakeApi();
             var controller = new KeepAwakeController(NewLogger(), api);
-            var host = new UserEspKeepAwakeHost("S1", "T1", ing, clock, NewLogger(), controller: controller, espTimeoutProvider: () => null);
+            var host = new UserEspKeepAwakeHost(ing, clock, NewLogger(), controller: controller, espTimeoutProvider: () => null);
 
             ing.Start();
             host.Start();
@@ -259,7 +259,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Orchestration
             using var ing = BuildIngress(clock);
             var api = new FakeKeepAwakeApi();
             var controller = new KeepAwakeController(NewLogger(), api);
-            var host = new UserEspKeepAwakeHost("S1", "T1", ing, clock, NewLogger(), controller: controller, espTimeoutProvider: () => null);
+            var host = new UserEspKeepAwakeHost(ing, clock, NewLogger(), controller: controller, espTimeoutProvider: () => null);
 
             ing.Start();
             host.Start();
@@ -282,7 +282,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Orchestration
             var api = new FakeKeepAwakeApi();
             var controller = new KeepAwakeController(NewLogger(), api);
             var host = new UserEspKeepAwakeHost(
-                "S1", "T1", ing, clock, NewLogger(),
+                ing, clock, NewLogger(),
                 controller: controller,
                 safetyCapOverride: TimeSpan.FromMilliseconds(75),
                 espTimeoutProvider: () => null);

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Program/AgentBootstrapSelfUpdateRetryTests.cs

@@ -11,7 +11,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Program
 {
     /// <summary>
     /// Contract tests for <see cref="AgentBootstrap.RetrySelfUpdateAfterEnrollment"/> —
-    /// the post-cert one-shot self-update retry (field case sits-d.cloud, 2026-08-09):
+    /// the post-cert one-shot self-update retry (field case 2026-08-09):
     /// guard on <see cref="SelfUpdater.LastVersionCheckSucceeded"/>, the relaxed
     /// timeouts/trigger it passes to the updater, and the swallow-everything exception
     /// contract (bootstrap must continue on any updater failure). Uses the

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Program/AgentRuntimeConfigTests.cs

@@ -44,7 +44,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Program
             // from a real backend). We exercise the bundle-shape contract here.
             var rcs = new AutopilotMonitor.Agent.V2.Core.Configuration.RemoteConfigService(
                 auth.BackendApiClient, "tenant-x", logger,
-                auth.EmergencyReporter, auth.DistressReporter, auth.AuthFailureTracker);
+                auth.EmergencyReporter, auth.AuthFailureTracker);
             var rc = new AgentConfigResponse();
             var merge = new RemoteConfigMergeResult();
 

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Program/BackendClientFactoryTests.cs

@@ -1,7 +1,13 @@
 using System.IO;
+using System.Net.Http;
+using System.Net.Security;
 using AutopilotMonitor.Agent.V2.Core.Configuration;
 using AutopilotMonitor.Agent.V2.Core.Logging;
+using AutopilotMonitor.Agent.V2.Core.Monitoring.Transport;
 using AutopilotMonitor.Agent.V2.Core.Tests.Harness;
+using AutopilotMonitor.Agent.V2.Core.Tests.Orchestration;
+using AutopilotMonitor.Agent.V2.Core.Tests.Transport;
+using AutopilotMonitor.Agent.V2.Core.Transport;
 using AutopilotMonitor.Agent.V2.Runtime;
 using Xunit;
 
@@ -68,6 +74,43 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Program
             Assert.False(bundle.HasClientCertificate);
         }
 
+        [Fact]
+        public void BuildAuthClients_carries_the_server_certificate_observer_for_both_stacks()
+        {
+            using var tmp = new TempDirectory();
+            var bundle = BackendClientFactory.BuildAuthClients(MinimalBootstrapTokenConfig(), agentVersion: "1.2.3.4", logger: NewLogger(tmp.Path));
+
+            Assert.NotNull(bundle.ServerCertificates);
+        }
+
+        [Fact]
+        public void BuildBackendApiHttpClient_installs_the_observing_callback_on_the_inner_handler()
+        {
+            var observer = new ServerCertificateObserver();
+            using var cert = ServerCertificateObserverTests.SelfSigned("CN=Example Inspection CA");
+
+            using var client = BackendClientFactory.BuildBackendApiHttpClient(new NetworkMetrics(), clientCertificate: null, agentVersion: "1.2.3.4", observer);
+            var inner = InnerHandler(client);
+            var callback = inner.ServerCertificateCustomValidationCallback;
+
+            Assert.NotNull(callback);
+            Assert.False(callback!(null!, cert, null!, SslPolicyErrors.RemoteCertificateNameMismatch));
+            Assert.True(callback(null!, cert, null!, SslPolicyErrors.None));
+            Assert.Equal(cert.Issuer, observer.LastIssuer);
+        }
+
+        [Fact]
+        public void BuildBackendApiHttpClient_without_observer_keeps_the_default_validation()
+        {
+            using var client = BackendClientFactory.BuildBackendApiHttpClient(new NetworkMetrics(), clientCertificate: null, agentVersion: "1.2.3.4");
+
+            Assert.Null(InnerHandler(client).ServerCertificateCustomValidationCallback);
+        }
+
+        // Pipeline: NetworkMetricsRecordingHandler → HttpClientHandler.
+        private static HttpClientHandler InnerHandler(HttpClient client) =>
+            (HttpClientHandler)((DelegatingHandler)MtlsHttpClientFactoryTests.GetPipelineHead(client)).InnerHandler;
+
         // =========================================================== TelemetryClientResult
 
         [Fact]

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Program/BackendSessionRegistrationTests.cs

@@ -122,20 +122,21 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Program
         // ============================================================ failed-registration record
 
         [Fact]
-        public void RecordRegistrationRun_records_a_failed_run_with_its_window_and_bounded_error()
+        public void RecordFailedRun_records_a_failed_run_with_its_window_and_bounded_error()
         {
             using var tmp = new TempDirectory();
             var persistence = new SessionIdPersistence(tmp.Path);
             var started = new DateTime(2026, 8, 20, 9, 0, 0, DateTimeKind.Utc);
 
-            BackendSessionRegistration.RecordRegistrationRun(
+            var returned = BackendSessionRegistration.RecordFailedRun(
                 persistence, SessionRegistrationResult.Failed(new string('e', 1000)),
                 started, started.AddSeconds(1204.46), linkUpAtStart: false, linkUpAtEnd: true,
-                configFetchOutcome: "UsedDefaults", logger: NewLogger(tmp.Path));
+                configFetchOutcome: "UsedDefaults", networkFingerprint: null, logger: NewLogger(tmp.Path));
 
             var record = persistence.LoadRegistrationFailure();
             Assert.NotNull(record);
             Assert.Equal(1, record!.FailedRuns);
+            Assert.Equal(0, record.InterceptedRuns);
             Assert.Equal("Failed", record.Outcome);
             Assert.Equal(BackendSessionRegistration.MaxRecordedErrorLength, record.LastError!.Length);
             Assert.False(record.NetworkLinkUpAtStart);
@@ -143,33 +144,34 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Program
             Assert.Equal(1204.5, record.AttemptWindowSeconds);
             Assert.Equal("UsedDefaults", record.ConfigFetchOutcome);
             Assert.Equal(started.AddSeconds(1204.46), record.LastFailedAtUtc);
+            // The caller decides on the record as written, including this run.
+            Assert.Equal(1, returned!.FailedRuns);
         }
 
         [Fact]
-        public void RecordRegistrationRun_records_auth_failures_and_clears_on_success()
+        public void RecordFailedRun_records_auth_failures_and_a_success_clears_them()
         {
             using var tmp = new TempDirectory();
             var persistence = new SessionIdPersistence(tmp.Path);
             var at = new DateTime(2026, 8, 20, 9, 0, 0, DateTimeKind.Utc);
 
-            BackendSessionRegistration.RecordRegistrationRun(
+            BackendSessionRegistration.RecordFailedRun(
                 persistence, SessionRegistrationResult.AuthFailed(401, "unauthorized"),
-                at, at.AddSeconds(3), true, true, "Succeeded", NewLogger(tmp.Path));
+                at, at.AddSeconds(3), true, true, "Succeeded", null, NewLogger(tmp.Path));
             Assert.Equal("AuthFailed", persistence.LoadRegistrationFailure()!.Outcome);
 
-            BackendSessionRegistration.RecordRegistrationRun(
-                persistence, SessionRegistrationResult.Succeeded(new RegisterSessionResponse { Success = true }),
-                at, at.AddSeconds(1), true, true, "Succeeded", NewLogger(tmp.Path));
+            BackendSessionRegistration.ClearAfterSuccess(persistence, () => null, NewLogger(tmp.Path));
             Assert.Null(persistence.LoadRegistrationFailure());
         }
 
         [Fact]
-        public void RecordRegistrationRun_without_persistence_is_a_no_op()
+        public void Recording_without_persistence_is_a_no_op()
         {
             using var tmp = new TempDirectory();
-            BackendSessionRegistration.RecordRegistrationRun(
+            Assert.Null(BackendSessionRegistration.RecordFailedRun(
                 null, SessionRegistrationResult.Failed("x"), DateTime.UtcNow, DateTime.UtcNow,
-                null, null, null, NewLogger(tmp.Path));
+                null, null, null, null, NewLogger(tmp.Path)));
+            Assert.Null(BackendSessionRegistration.ClearAfterSuccess(null, () => null, NewLogger(tmp.Path)));
         }
 
         // ============================================================ emergency-break message

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Program/InterceptedRegistrationTests.cs

@@ -0,0 +1,477 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Net;
+using System.Net.Http;
+using System.Threading.Tasks;
+using AutopilotMonitor.Agent.V2.Core.Configuration;
+using AutopilotMonitor.Agent.V2.Core.Logging;
+using AutopilotMonitor.Agent.V2.Core.Monitoring.Runtime;
+using AutopilotMonitor.Agent.V2.Core.Monitoring.Transport;
+using AutopilotMonitor.Agent.V2.Core.Orchestration;
+using AutopilotMonitor.Agent.V2.Core.Security;
+using AutopilotMonitor.Agent.V2.Core.Tests.Harness;
+using AutopilotMonitor.Agent.V2.Core.Tests.Orchestration;
+using AutopilotMonitor.Agent.V2.Core.Tests.Transport;
+using AutopilotMonitor.Agent.V2.Runtime;
+using AutopilotMonitor.DecisionCore.Engine;
+using AutopilotMonitor.Shared.Models;
+using Newtonsoft.Json;
+using Xunit;
+using ProgramAlias = AutopilotMonitor.Agent.V2.Program;
+
+namespace AutopilotMonitor.Agent.V2.Core.Tests.Program
+{
+    /// <summary>
+    /// A registration that something on the network path answered at process start (client
+    /// certificate interception plan, K4/K5): a buffer of further boots, then the emergency break's
+    /// cleanup; the pending ClientCertificateNotReceived distress leaves the machine first; a later
+    /// successful registration reports the failed starts on <c>agent_started</c>. Each start is
+    /// ended the way <see cref="BackendSessionRegistration.Register"/> ends it: record the failed
+    /// run, then conclude it.
+    /// </summary>
+    public sealed class InterceptedRegistrationTests : IDisposable
+    {
+        private static readonly DateTime At = new DateTime(2026, 10, 12, 9, 0, 0, DateTimeKind.Utc);
+
+        private readonly TempDirectory _tmp = new TempDirectory();
+        private readonly AgentLogger _logger;
+        private readonly SessionIdPersistence _persistence;
+        private readonly string _stateDir;
+        private int _cleanupCalls;
+
+        public InterceptedRegistrationTests()
+        {
+            _logger = new AgentLogger(Path.Combine(_tmp.Path, "logs"), AgentLogLevel.Info);
+            _persistence = new SessionIdPersistence(_tmp.Path);
+            _persistence.GetOrCreate(_logger);
+            _stateDir = Path.Combine(_tmp.Path, "State");
+        }
+
+        public void Dispose() => _tmp.Dispose();
+
+        // ============================================================ K4: buffer, then clean up
+
+        [Fact]
+        public void Agent_default_buffer_allows_one_further_boot_then_cleans_up()
+        {
+            var config = new AgentConfiguration();
+            Assert.Equal(1, config.InterceptedRegistrationRetryBoots);
+
+            Assert.Equal(6, Boot(Intercepted(), config));
+
+            Assert.False(GaveUp);
+            Assert.True(_persistence.SessionExists());
+            Assert.Equal(0, _cleanupCalls);
+            var record = _persistence.LoadRegistrationFailure()!;
+            Assert.Equal(1, record.FailedRuns);
+            Assert.Equal(1, record.InterceptedRuns);
+            Assert.Equal("AuthFailed", record.Outcome);
+
+            Assert.Equal(6, Boot(Intercepted(), config)); // the give-up keeps exit 6
+
+            AssertCleanedUpLikeTheEmergencyBreak(expectedCleanupCalls: 1);
+        }
+
+        [Theory]
+        [InlineData(0)] // clean up at the first intercepted start
+        [InlineData(2)]
+        [InlineData(5)]
+        public void Gives_up_on_the_first_intercepted_start_beyond_the_buffer(int buffer)
+        {
+            var config = new AgentConfiguration { InterceptedRegistrationRetryBoots = buffer };
+
+            for (var start = 1; start <= buffer; start++)
+            {
+                Assert.Equal(6, Boot(Intercepted(), config));
+                Assert.False(GaveUp, $"gave up on start {start} with a buffer of {buffer}");
+            }
+
+            Assert.Equal(6, Boot(Intercepted(), config));
+
+            AssertCleanedUpLikeTheEmergencyBreak(expectedCleanupCalls: 1);
+        }
+
+        [Theory]
+        [InlineData(true, 1)]
+        [InlineData(false, 0)]
+        public void Give_up_runs_the_cleanup_only_with_SelfDestructOnComplete_like_the_emergency_break(
+            bool selfDestructOnComplete, int expectedCleanupCalls)
+        {
+            var config = new AgentConfiguration
+            {
+                InterceptedRegistrationRetryBoots = 0,
+                SelfDestructOnComplete = selfDestructOnComplete,
+            };
+
+            Assert.Equal(6, Boot(Intercepted(), config));
+
+            AssertCleanedUpLikeTheEmergencyBreak(expectedCleanupCalls);
+        }
+
+        [Fact]
+        public async Task An_intercepted_start_takes_the_buffer_from_the_cached_config()
+        {
+            // The config fetch of an intercepted start is intercepted too: it falls back to the
+            // cache, and the registration decides on the cached buffer, not the agent default.
+            var config = new AgentConfiguration();
+            var service = new InterceptedConfigService(_logger, cached: new AgentConfigResponse
+            {
+                InterceptedRegistrationRetryBoots = 0,
+                SelfDestructOnComplete = true,
+            });
+
+            var fetched = await service.FetchConfigAsync(retryOnTransientErrors: true);
+            Assert.Equal(RemoteConfigFetchOutcome.FromCache, service.LastFetchOutcome);
+            RemoteConfigMerger.Merge(config, fetched, _logger);
+            Assert.Equal(0, config.InterceptedRegistrationRetryBoots);
+
+            Assert.Equal(6, Boot(Intercepted(), config));
+
+            AssertCleanedUpLikeTheEmergencyBreak(expectedCleanupCalls: 1);
+        }
+
+        [Fact]
+        public void Backend_rejection_and_network_failure_keep_their_exit_codes_and_never_give_up()
+        {
+            var config = new AgentConfiguration { InterceptedRegistrationRetryBoots = 0 };
+
+            Assert.Equal(6, Boot(BackendRejected(), config));
+            Assert.Equal(7, Boot(NetworkFailure(), config));
+
+            Assert.False(GaveUp);
+            Assert.True(_persistence.SessionExists());
+            Assert.Equal(0, _cleanupCalls);
+            var record = _persistence.LoadRegistrationFailure()!;
+            Assert.Equal(2, record.FailedRuns);
+            Assert.Equal(0, record.InterceptedRuns);
+        }
+
+        [Fact]
+        public void Only_an_intercepted_start_gives_up_even_when_the_count_already_exceeds_the_buffer()
+        {
+            var config = new AgentConfiguration { InterceptedRegistrationRetryBoots = 5 };
+            Boot(Intercepted(), config);
+            Boot(Intercepted(), config);
+            config.InterceptedRegistrationRetryBoots = 0; // e.g. a later cached config lowered it
+
+            Assert.Equal(6, Boot(BackendRejected(), config));
+            Assert.Equal(7, Boot(NetworkFailure(), config));
+
+            Assert.False(GaveUp);
+            Assert.Equal(0, _cleanupCalls);
+            var record = _persistence.LoadRegistrationFailure()!;
+            Assert.Equal(4, record.FailedRuns);
+            Assert.Equal(2, record.InterceptedRuns); // unchanged by the other failures
+            Assert.Equal("Failed", record.Outcome);
+        }
+
+        [Fact]
+        public void Failures_of_another_kind_between_interceptions_do_not_reset_the_count()
+        {
+            var config = new AgentConfiguration(); // buffer 1
+
+            Assert.Equal(6, Boot(Intercepted(), config));
+            Assert.Equal(7, Boot(NetworkFailure(), config));
+            Assert.Equal(6, Boot(BackendRejected(), config));
+            Assert.False(GaveUp);
+
+            Assert.Equal(6, Boot(Intercepted(), config)); // second interception since the last success
+
+            AssertCleanedUpLikeTheEmergencyBreak(expectedCleanupCalls: 1);
+        }
+
+        [Fact]
+        public void Only_a_successful_registration_resets_the_count()
+        {
+            var config = new AgentConfiguration(); // buffer 1
+            Boot(Intercepted(), config);
+            BackendSessionRegistration.ClearAfterSuccess(_persistence, () => "fp-office", _logger);
+
+            Assert.Equal(6, Boot(Intercepted(), config));
+
+            Assert.False(GaveUp);
+            Assert.Equal(1, _persistence.LoadRegistrationFailure()!.InterceptedRuns);
+        }
+
+        [Fact]
+        public void Without_a_written_record_the_buffer_cannot_be_enforced_and_the_next_boot_retries()
+        {
+            var config = new AgentConfiguration { InterceptedRegistrationRetryBoots = 0 };
+
+            var exit = BackendSessionRegistration.ConcludeFailedRun(
+                Intercepted(), record: null, config, authFailureTracker: null,
+                _persistence, _stateDir, CleanupFactory, _logger);
+
+            Assert.Equal(6, exit);
+            Assert.False(GaveUp);
+            Assert.True(_persistence.SessionExists());
+        }
+
+        [Theory]
+        [InlineData(true)]
+        [InlineData(false)]
+        public async Task The_registration_answer_decides_whether_the_start_counts_as_intercepted(bool foreign)
+        {
+            // Through the real client: no correlation echo + the platform's "Client Certificate
+            // Required" page is an interception; a JSON 403 that echoes the id is the backend's verdict.
+            using var handler = new RecordingHttpMessageHandler();
+            if (foreign)
+                handler.QueueForeign(HttpStatusCode.Forbidden, InterceptionFixtures.CertificateRequiredPage);
+            else
+                handler.QueueStatus(HttpStatusCode.Forbidden, "{\"error\":\"Device validation failed\"}");
+            using var http = new HttpClient(handler);
+            var apiClient = new BackendApiClient(
+                http, "https://backend.test", manufacturer: "m", model: "d", serialNumber: "s",
+                useBootstrapTokenAuth: false, bootstrapToken: null, agentVersion: "0.0.0", logger: _logger);
+            var distress = new FakeDistressReporter();
+            var config = new AgentConfiguration
+            {
+                ApiBaseUrl = "https://backend.test",
+                TenantId = "00000000-0000-0000-0000-000000000001",
+                SessionId = _persistence.GetOrCreate(_logger),
+                InterceptedRegistrationRetryBoots = 0,
+            };
+
+            var result = await SessionRegistrationHelper.RegisterWithRetryAsync(
+                apiClient, config, agentVersion: "0.0.0", logger: _logger,
+                authFailureTracker: NewTracker(distress),
+                deviceHardware: ("m", "d", "s"),
+                networkLinkWait: _ => Task.CompletedTask);
+
+            Assert.Equal(SessionRegistrationOutcome.AuthFailed, result.Outcome);
+            Assert.Equal(foreign, result.IsIntercepted);
+            Assert.Equal(
+                foreign ? DistressErrorType.ClientCertificateNotReceived : DistressErrorType.DeviceNotRegistered,
+                Assert.Single(distress.Calls).ErrorType);
+
+            Assert.Equal(6, Boot(result, config));
+            Assert.Equal(foreign, GaveUp);
+        }
+
+        // ============================================================ the distress leaves first
+
+        [Fact]
+        public void The_exit_waits_for_the_pending_ClientCertificateNotReceived_send()
+        {
+            var record = RecordFailed(Intercepted(), "fp-office");
+            var (tracker, inFlight) = DispatchSlowCertificateDistress();
+
+            var exit = BackendSessionRegistration.ConcludeFailedRun(
+                Intercepted(), record, new AgentConfiguration(), tracker,
+                _persistence, _stateDir, CleanupFactory, _logger);
+
+            Assert.Equal(6, exit);
+            Assert.True(inFlight.IsCompleted);
+            Assert.False(GaveUp);
+        }
+
+        [Fact]
+        public void The_give_up_waits_for_the_pending_send_before_it_cleans_up()
+        {
+            var record = RecordFailed(Intercepted(), "fp-office");
+            var (tracker, inFlight) = DispatchSlowCertificateDistress();
+            bool? sentBeforeCleanup = null;
+
+            var exit = BackendSessionRegistration.ConcludeFailedRun(
+                Intercepted(), record, new AgentConfiguration { InterceptedRegistrationRetryBoots = 0 }, tracker,
+                _persistence, _stateDir,
+                () =>
+                {
+                    sentBeforeCleanup = inFlight.IsCompleted;
+                    throw new InvalidOperationException("test-harness: cleanup factory must not spawn real PowerShell in unit tests");
+                },
+                _logger);
+
+            Assert.Equal(6, exit);
+            Assert.True(sentBeforeCleanup);
+            Assert.True(GaveUp);
+        }
+
+        [Fact]
+        public void The_wait_for_the_distress_is_bounded_by_its_own_http_timeout()
+        {
+            Assert.True(BackendSessionRegistration.PendingDistressBound <= TimeSpan.FromSeconds(5));
+        }
+
+        // ============================================================ K5: measurement point
+
+        [Theory]
+        [InlineData("fp-office", "fp-office", false)]
+        [InlineData("fp-office", "fp-home", true)]
+        public void A_success_after_failed_starts_reports_the_record_it_clears(
+            string failedOn, string registeredOn, bool networkChanged)
+        {
+            var config = new AgentConfiguration { InterceptedRegistrationRetryBoots = 5 };
+            Boot(NetworkFailure(), config, fingerprint: "fp-elsewhere");
+            Boot(Intercepted(), config, fingerprint: failedOn); // the latest failed start's network counts
+
+            var prior = BackendSessionRegistration.ClearAfterSuccess(_persistence, () => registeredOn, _logger)!;
+
+            Assert.Equal(2, prior.FailedRuns);
+            Assert.Equal(1, prior.InterceptedRuns);
+            Assert.Equal("AuthFailed", prior.LastOutcome);
+            Assert.Equal(networkChanged, prior.NetworkChanged);
+            Assert.Null(_persistence.LoadRegistrationFailureRecord());
+
+            var data = EmitAgentStarted(prior);
+            Assert.Equal(2, data["priorRegistrationFailedRuns"]);
+            Assert.Equal(1, data["priorRegistrationInterceptedRuns"]);
+            Assert.Equal("AuthFailed", data["priorRegistrationLastOutcome"]);
+            Assert.Equal(networkChanged, data["priorRegistrationNetworkChanged"]);
+        }
+
+        [Theory]
+        [InlineData(null, "fp-home")]   // the failed start's network was unknown
+        [InlineData("fp-office", null)] // this start's network is unknown
+        public void Network_change_is_omitted_when_either_fingerprint_is_unknown(string? failedOn, string? registeredOn)
+        {
+            Boot(Intercepted(), new AgentConfiguration(), fingerprint: failedOn);
+
+            var prior = BackendSessionRegistration.ClearAfterSuccess(_persistence, () => registeredOn!, _logger)!;
+
+            Assert.Null(prior.NetworkChanged);
+            var data = EmitAgentStarted(prior);
+            Assert.Equal(1, data["priorRegistrationFailedRuns"]);
+            Assert.False(data.ContainsKey("priorRegistrationNetworkChanged"));
+        }
+
+        [Fact]
+        public void A_success_without_failed_starts_reports_nothing_and_never_reads_the_network()
+        {
+            var captures = 0;
+
+            var prior = BackendSessionRegistration.ClearAfterSuccess(
+                _persistence, () => { captures++; return "fp-office"; }, _logger);
+
+            Assert.Null(prior);
+            Assert.Equal(0, captures);
+            Assert.DoesNotContain(EmitAgentStarted(null).Keys, k => k.StartsWith("priorRegistration", StringComparison.Ordinal));
+        }
+
+        [Fact]
+        public void The_network_fingerprint_stays_on_the_device()
+        {
+            Boot(Intercepted(), new AgentConfiguration(), fingerprint: "0123456789abcdef");
+
+            // Kept locally beside the record ...
+            Assert.Contains("0123456789abcdef", File.ReadAllText(Path.Combine(_tmp.Path, "registration-failure.json")));
+            Assert.Equal("0123456789abcdef", _persistence.LoadRegistrationFailureRecord()!.NetworkFingerprint);
+
+            // ... while the summary the emergency break sends cannot carry it.
+            var wire = JsonConvert.SerializeObject(new AgentErrorReport
+            {
+                PriorRegistrationFailure = _persistence.LoadRegistrationFailure(),
+            });
+            Assert.DoesNotContain("0123456789abcdef", wire);
+            Assert.DoesNotContain("Fingerprint", wire);
+            Assert.Contains("\"InterceptedRuns\":1", wire);
+        }
+
+        // ============================================================ helpers
+
+        private static SessionRegistrationResult Intercepted() =>
+            SessionRegistrationResult.AuthFailed(403, "The device certificate did not reach the backend.", intercepted: true);
+
+        private static SessionRegistrationResult BackendRejected() =>
+            SessionRegistrationResult.AuthFailed(403, "Backend returned 403 Forbidden. The device is not authorized.");
+
+        private static SessionRegistrationResult NetworkFailure() =>
+            SessionRegistrationResult.Failed("No such host is known.");
+
+        private bool GaveUp => File.Exists(Path.Combine(_stateDir, "enrollment-complete.marker"));
+
+        private AuthFailureTracker NewTracker(FakeDistressReporter distress) =>
+            new AuthFailureTracker(maxFailures: 5, timeoutMinutes: 0, SystemClock.Instance, _logger, distress);
+
+        /// <summary>
+        /// What the registration helper does when the answer did not come from the backend: the
+        /// tracker dispatches ClientCertificateNotReceived — here a send that stays in flight for a
+        /// second, started right before the conclusion so nothing else can use the time up.
+        /// </summary>
+        private (AuthFailureTracker Tracker, Task InFlight) DispatchSlowCertificateDistress()
+        {
+            Task? inFlight = null;
+            var distress = new FakeDistressReporter { Send = () => inFlight = Task.Delay(TimeSpan.FromSeconds(1)) };
+            var tracker = NewTracker(distress);
+            tracker.RecordFailure(403, "agent/register-session", InterceptionFixtures.CertificateRequired());
+
+            Assert.Equal(DistressErrorType.ClientCertificateNotReceived, Assert.Single(distress.Calls).ErrorType);
+            Assert.False(inFlight!.IsCompleted);
+            return (tracker, inFlight);
+        }
+
+        private RegistrationFailureSummary? RecordFailed(SessionRegistrationResult result, string? fingerprint) =>
+            BackendSessionRegistration.RecordFailedRun(
+                _persistence, result, At, At.AddSeconds(2), linkUpAtStart: true, linkUpAtEnd: true,
+                configFetchOutcome: "FromCache", networkFingerprint: fingerprint, logger: _logger);
+
+        /// <summary>One start whose registration failed with <paramref name="result"/>, ended the way Register ends it.</summary>
+        private int Boot(SessionRegistrationResult result, AgentConfiguration config, string? fingerprint = "fp-office")
+        {
+            var record = RecordFailed(result, fingerprint);
+            return BackendSessionRegistration.ConcludeFailedRun(
+                result, record, config, authFailureTracker: null, _persistence, _stateDir, CleanupFactory, _logger);
+        }
+
+        private CleanupService CleanupFactory()
+        {
+            _cleanupCalls++;
+            // The real factory spawns a PowerShell cleanup script; throwing makes the cleanup retry
+            // swallow and log it, so the call is counted without a side effect (as in ProgramGuardsTests).
+            throw new InvalidOperationException("test-harness: cleanup factory must not spawn real PowerShell in unit tests");
+        }
+
+        /// <summary>The emergency break's end state (ProgramGuardsTests): marker, session files gone, cleanup per SelfDestructOnComplete.</summary>
+        private void AssertCleanedUpLikeTheEmergencyBreak(int expectedCleanupCalls)
+        {
+            Assert.True(GaveUp);
+            Assert.False(_persistence.SessionExists());
+            Assert.Null(_persistence.LoadRegistrationFailure());
+            Assert.Equal(expectedCleanupCalls, _cleanupCalls);
+            // The next start ends at the bootstrap guard, exactly as after the break.
+            Assert.True(ProgramAlias.CheckEnrollmentCompleteMarker(
+                _stateDir, selfDestructOnComplete: false, cleanupServiceFactory: null, _logger, consoleMode: false));
+        }
+
+        private Dictionary<string, object> EmitAgentStarted(PriorRegistrationFailures? prior)
+        {
+            var sink = new FakeSignalIngressSink();
+            LifecycleEmitters.EmitAgentStarted(
+                new InformationalEventPost(sink, SystemClock.Instance, _logger),
+                new AgentConfiguration { SessionId = "S1", TenantId = "00000000-0000-0000-0000-000000000001", CommandLineArgs = string.Empty },
+                new ProgramAlias.PreviousExitSummary { ExitType = "reboot_kill" },
+                "2.0.test",
+                remoteConfigService: null,
+                _logger,
+                priorRegistrationFailures: prior);
+            return (Dictionary<string, object>)Assert.Single(sink.Posted).TypedPayload!;
+        }
+
+        /// <summary>A start whose config fetch is answered by the interception: it falls back to the cache.</summary>
+        private sealed class InterceptedConfigService : RemoteConfigService
+        {
+            private readonly AgentConfigResponse _cached;
+
+            public InterceptedConfigService(AgentLogger logger, AgentConfigResponse cached)
+                : base(
+                    new BackendApiClient(
+                        httpClient: new HttpClient(), baseUrl: "http://localhost", manufacturer: string.Empty,
+                        model: string.Empty, serialNumber: string.Empty, useBootstrapTokenAuth: false,
+                        bootstrapToken: null, agentVersion: "0.0.0", logger: logger),
+                    "00000000-0000-0000-0000-000000000001",
+                    logger)
+            {
+                _cached = cached;
+            }
+
+            protected override Task<AgentConfigResponse> CallBackendAsync() =>
+                throw new BackendAuthException("The device certificate did not reach the backend.", 403,
+                    classification: InterceptionFixtures.CertificateRequired());
+
+            protected override AgentConfigResponse LoadCachedConfig() => _cached;
+
+            protected override Task WaitForNetworkLinkAsync() => Task.CompletedTask;
+        }
+    }
+}

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Program/LifecycleEmittersRemoteConfigTests.cs

@@ -44,6 +44,22 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Program
             Assert.Equal("Succeeded", data["remoteConfigOutcome"]);
         }
 
+        [Fact]
+        public void EmitAgentStarted_CarriesTheBootstrapProvenance()
+        {
+            // Values depend on the machine's %ProgramData%\AutopilotMonitor\Logs (see
+            // BootstrapProvenanceReaderTests); the two presence flags are always on the wire.
+            using var rig = new EmitterRig();
+            rig.RemoteConfig.SetFakeOutcome(RemoteConfigFetchOutcome.Succeeded, configVersion: 28);
+
+            LifecycleEmitters.EmitAgentStarted(
+                rig.Post, rig.AgentConfig, rig.PreviousExit, "2.0.806", rig.RemoteConfig, rig.Logger);
+
+            var data = AssertSingleEmit(rig.Sink, expectedEventType: "agent_started");
+            Assert.IsType<bool>(data["bootstrapScriptLogPresent"]);
+            Assert.IsType<bool>(data["oobeBootstrapLogPresent"]);
+        }
+
         [Fact]
         public void EmitAgentStarted_OnFallbackToDefaults_FlagsRemoteConfigFalse()
         {
@@ -182,7 +198,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Program
             Assert.Equal("FromCache", data["outcome"]);
         }
 
-        // ── Post-registration recovery (Phase 6.5, tenant aebdce78 audit 2026-08-24) ─
+        // ── Post-registration recovery (Phase 6.5, kiosk-tenant audit 2026-08-24) ─
 
         [Fact]
         public void EmitFetchFailedIfAny_AfterRecovery_MarksRecoveredAndDemotesToInfo()

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Program/ServerControlPlaneSessionGoneTests.cs

@@ -0,0 +1,170 @@
+#nullable enable
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+using AutopilotMonitor.Agent.V2.Core.Configuration;
+using AutopilotMonitor.Agent.V2.Core.Logging;
+using AutopilotMonitor.Agent.V2.Core.Monitoring.Runtime;
+using AutopilotMonitor.Agent.V2.Core.Monitoring.Transport;
+using AutopilotMonitor.Agent.V2.Core.Orchestration;
+using AutopilotMonitor.Agent.V2.Core.Tests.Harness;
+using AutopilotMonitor.Agent.V2.Core.Tests.Orchestration;
+using AutopilotMonitor.Shared.Models;
+using Xunit;
+
+namespace AutopilotMonitor.Agent.V2.Core.Tests.Program
+{
+    /// <summary>
+    /// Host wiring for <c>TelemetryUploadOrchestrator.SessionGone</c>
+    /// (HTTP 410 on the current session's telemetry): exactly one
+    /// <see cref="AgentErrorType.TelemetryRejectedSessionUnknown"/> emergency report carrying the
+    /// status, then a synthetic forced <c>terminate_session</c> tagged <c>origin=session_gone</c>
+    /// — and nothing at all once a shutdown is already in progress.
+    /// </summary>
+    public sealed class ServerControlPlaneSessionGoneTests
+    {
+        private sealed class RecordingEmergencyReporter : EmergencyReporter
+        {
+            private readonly List<string> _sequence;
+            public List<(AgentErrorType ErrorType, string Message, int? HttpStatusCode)> Reports { get; } =
+                new List<(AgentErrorType, string, int?)>();
+
+            public RecordingEmergencyReporter(List<string> sequence)
+                : base(apiClient: null!, sessionId: "S1", tenantId: "T1", agentVersion: "0.0.0", logger: null!)
+            {
+                _sequence = sequence;
+            }
+
+            public override Task TrySendAsync(
+                AgentErrorType errorType,
+                string message,
+                int? httpStatusCode = null,
+                long? sequenceNumber = null,
+                int attempts = 1,
+                TimeSpan? perAttemptTimeout = null,
+                TimeSpan? retryDelay = null,
+                double? sessionAgeHours = null,
+                RegistrationFailureSummary? priorRegistrationFailure = null)
+            {
+                Reports.Add((errorType, message, httpStatusCode));
+                _sequence.Add("report");
+                return Task.CompletedTask;
+            }
+        }
+
+        private sealed class RecordingDispatcher : ServerActionDispatcher
+        {
+            private readonly List<string> _sequence;
+            public List<ServerAction> Dispatched { get; } = new List<ServerAction>();
+
+            public RecordingDispatcher(AgentConfiguration config, AgentLogger logger, InformationalEventPost post, List<string> sequence)
+                : base(
+                    configuration: config,
+                    logger: logger,
+                    rotateConfigAsync: () => Task.FromResult(true),
+                    uploadDiagnosticsAsync: _ => Task.FromResult<DiagnosticsUploadResult>(null!),
+                    onTerminateRequested: _ => Task.CompletedTask,
+                    post: post)
+            {
+                _sequence = sequence;
+            }
+
+            public override Task DispatchAsync(List<ServerAction> actions)
+            {
+                Dispatched.AddRange(actions);
+                _sequence.Add("dispatch");
+                return Task.CompletedTask;
+            }
+        }
+
+        private sealed class Rig : IDisposable
+        {
+            public TempDirectory Tmp { get; } = new TempDirectory();
+            public AgentLogger Logger { get; }
+            public List<string> Sequence { get; } = new List<string>();
+            public RecordingEmergencyReporter Reporter { get; }
+            public RecordingDispatcher Dispatcher { get; }
+            public ManualResetEventSlim Shutdown { get; } = new ManualResetEventSlim(false);
+            public ManualResetEventSlim ShutdownComplete { get; } = new ManualResetEventSlim(false);
+
+            public Rig()
+            {
+                Logger = new AgentLogger(Path.Combine(Tmp.Path, "logs"), AgentLogLevel.Info);
+                var config = new AgentConfiguration { SessionId = "S1", TenantId = "T1", ApiBaseUrl = "http://localhost" };
+                var post = new InformationalEventPost(
+                    new FakeSignalIngressSink(),
+                    new VirtualClock(new DateTime(2026, 10, 9, 10, 0, 0, DateTimeKind.Utc)));
+                Reporter = new RecordingEmergencyReporter(Sequence);
+                Dispatcher = new RecordingDispatcher(config, Logger, post, Sequence);
+            }
+
+            public void Handle(string reason = "session gone: http 410") =>
+                global::AutopilotMonitor.Agent.V2.Runtime.ServerControlPlane.HandleSessionGone(
+                    reason, Reporter, Dispatcher, Shutdown, ShutdownComplete, Logger);
+
+            public void Dispose()
+            {
+                Shutdown.Dispose();
+                ShutdownComplete.Dispose();
+                Tmp.Dispose();
+            }
+        }
+
+        [Fact]
+        public void Reports_once_with_410_then_dispatches_forced_terminate_tagged_session_gone()
+        {
+            using var rig = new Rig();
+
+            rig.Handle();
+
+            Assert.Equal(new[] { "report", "dispatch" }, rig.Sequence);
+
+            var report = Assert.Single(rig.Reporter.Reports);
+            Assert.Equal(AgentErrorType.TelemetryRejectedSessionUnknown, report.ErrorType);
+            Assert.Equal(410, report.HttpStatusCode);
+            Assert.Contains("410", report.Message);
+
+            var action = Assert.Single(rig.Dispatcher.Dispatched);
+            Assert.Equal(ServerActionTypes.TerminateSession, action.Type);
+            Assert.Contains("410", action.Reason);
+            Assert.NotNull(action.Params);
+            var parameters = action.Params!;
+            Assert.Equal("true", parameters["forceSelfDestruct"]);
+            Assert.Equal("0", parameters["gracePeriodSeconds"]);
+            Assert.Equal(TerminationOrigins.SessionGone, parameters["origin"]);
+        }
+
+        [Theory]
+        [InlineData(true, false)]
+        [InlineData(false, true)]
+        public void Does_nothing_when_a_shutdown_is_already_in_progress(bool shutdownSet, bool shutdownCompleteSet)
+        {
+            using var rig = new Rig();
+            if (shutdownSet) rig.Shutdown.Set();
+            if (shutdownCompleteSet) rig.ShutdownComplete.Set();
+
+            rig.Handle();
+
+            Assert.Empty(rig.Reporter.Reports);
+            Assert.Empty(rig.Dispatcher.Dispatched);
+        }
+
+        [Fact]
+        public void ReadOrigin_returns_the_origin_param_or_null()
+        {
+            Assert.Equal(TerminationOrigins.SessionGone,
+                global::AutopilotMonitor.Agent.V2.Runtime.ServerControlPlane.ReadOrigin(
+                    new Dictionary<string, string> { ["origin"] = TerminationOrigins.SessionGone }));
+            Assert.Equal(TerminationOrigins.KillSignal,
+                global::AutopilotMonitor.Agent.V2.Runtime.ServerControlPlane.ReadOrigin(
+                    new Dictionary<string, string> { ["origin"] = TerminationOrigins.KillSignal, ["forceSelfDestruct"] = "true" }));
+            Assert.Null(global::AutopilotMonitor.Agent.V2.Runtime.ServerControlPlane.ReadOrigin(
+                new Dictionary<string, string> { ["adminOutcome"] = "Failed" }));
+            Assert.Null(global::AutopilotMonitor.Agent.V2.Runtime.ServerControlPlane.ReadOrigin(
+                new Dictionary<string, string> { ["origin"] = string.Empty }));
+            Assert.Null(global::AutopilotMonitor.Agent.V2.Runtime.ServerControlPlane.ReadOrigin(null!));
+        }
+    }
+}

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Security/AgentDirectoryAclTests.cs

@@ -0,0 +1,113 @@
+using System;
+using System.IO;
+using System.Linq;
+using System.Security.AccessControl;
+using System.Security.Principal;
+using AutopilotMonitor.Agent.V2.Core.Security;
+using Xunit;
+
+namespace AutopilotMonitor.Agent.V2.Core.Tests.Security
+{
+    /// <summary>
+    /// The agent data directory keeps standard users from adding files where the SYSTEM agent
+    /// starts from. Works on a temp folder the test owns; as owner it can always hand itself the
+    /// rights back to clean up.
+    /// </summary>
+    public sealed class AgentDirectoryAclTests : IDisposable
+    {
+        private const FileSystemRights WriteRights =
+            FileSystemRights.WriteData | FileSystemRights.AppendData | FileSystemRights.WriteAttributes
+            | FileSystemRights.WriteExtendedAttributes | FileSystemRights.Delete | FileSystemRights.DeleteSubdirectoriesAndFiles
+            | FileSystemRights.ChangePermissions | FileSystemRights.TakeOwnership;
+
+        private static readonly SecurityIdentifier Users = new SecurityIdentifier(WellKnownSidType.BuiltinUsersSid, null);
+
+        private readonly string _root = Path.Combine(Path.GetTempPath(), "apm-acl-" + Guid.NewGuid().ToString("N"));
+
+        public AgentDirectoryAclTests() => Directory.CreateDirectory(_root);
+
+        public void Dispose()
+        {
+            try
+            {
+                var me = WindowsIdentity.GetCurrent().User!;
+                var directory = new DirectoryInfo(_root);
+                var security = directory.GetAccessControl();
+                security.AddAccessRule(new FileSystemAccessRule(me, FileSystemRights.FullControl,
+                    InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit, PropagationFlags.None, AccessControlType.Allow));
+                directory.SetAccessControl(security);
+                Directory.Delete(_root, recursive: true);
+            }
+            catch
+            {
+                // best effort: a leftover temp folder must not fail the run
+            }
+        }
+
+        private static FileSystemRights UsersRights(string path) =>
+            new DirectoryInfo(path).GetAccessControl()
+                .GetAccessRules(includeExplicit: true, includeInherited: true, typeof(SecurityIdentifier))
+                .Cast<FileSystemAccessRule>()
+                .Where(r => r.AccessControlType == AccessControlType.Allow && Users.Equals(r.IdentityReference))
+                .Aggregate((FileSystemRights)0, (all, r) => all | r.FileSystemRights);
+
+        [Fact]
+        public void The_protected_security_inherits_nothing_and_gives_users_read_only()
+        {
+            var security = AgentDirectoryAcl.BuildProtectedSecurity();
+
+            Assert.True(security.AreAccessRulesProtected);
+            var users = security.GetAccessRules(true, true, typeof(SecurityIdentifier)).Cast<FileSystemAccessRule>()
+                .Single(r => Users.Equals(r.IdentityReference));
+            // An allow rule always carries Synchronize; .NET adds it on construction.
+            Assert.Equal(FileSystemRights.ReadAndExecute, users.FileSystemRights & ~FileSystemRights.Synchronize);
+            Assert.Equal((FileSystemRights)0, users.FileSystemRights & WriteRights);
+        }
+
+        [Fact]
+        public void A_folder_is_protected_once_and_then_left_alone()
+        {
+            var first = AgentDirectoryAcl.EnsureProtected(_root);
+            var second = AgentDirectoryAcl.EnsureProtected(_root);
+
+            Assert.Equal(AgentDirectoryAclOutcome.Applied, first.Outcome);
+            Assert.Equal(AgentDirectoryAclOutcome.AlreadyProtected, second.Outcome);
+            Assert.True(AgentDirectoryAcl.IsProtectedAsExpected(new DirectoryInfo(_root).GetAccessControl(AccessControlSections.Access)));
+            Assert.Equal((FileSystemRights)0, UsersRights(_root) & WriteRights);
+        }
+
+        [Fact]
+        public void Existing_subfolders_take_over_the_protection()
+        {
+            // Install mode protects the base after Agent, Spool and Logs already exist.
+            var agent = Directory.CreateDirectory(Path.Combine(_root, "Agent")).FullName;
+
+            AgentDirectoryAcl.EnsureProtected(_root);
+
+            Assert.Equal((FileSystemRights)0, UsersRights(agent) & WriteRights);
+            Assert.NotEqual((FileSystemRights)0, UsersRights(agent) & FileSystemRights.ReadAndExecute);
+        }
+
+        [Fact]
+        public void An_unprotected_or_widened_dacl_is_not_taken_as_protected()
+        {
+            var unprotected = AgentDirectoryAcl.BuildProtectedSecurity();
+            unprotected.SetAccessRuleProtection(isProtected: false, preserveInheritance: true);
+            Assert.False(AgentDirectoryAcl.IsProtectedAsExpected(unprotected));
+
+            var widened = AgentDirectoryAcl.BuildProtectedSecurity();
+            widened.AddAccessRule(new FileSystemAccessRule(Users, FileSystemRights.Modify,
+                InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit, PropagationFlags.None, AccessControlType.Allow));
+            Assert.False(AgentDirectoryAcl.IsProtectedAsExpected(widened));
+        }
+
+        [Fact]
+        public void A_missing_folder_is_reported_not_created()
+        {
+            var missing = Path.Combine(_root, "does-not-exist");
+
+            Assert.Equal(AgentDirectoryAclOutcome.Missing, AgentDirectoryAcl.EnsureProtected(missing).Outcome);
+            Assert.False(Directory.Exists(missing));
+        }
+    }
+}

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Security/AuthFailureTrackerTests.cs

@@ -1,11 +1,12 @@
 using System;
-using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 using AutopilotMonitor.Agent.V2.Core.Logging;
-using AutopilotMonitor.Agent.V2.Core.Monitoring.Transport;
 using AutopilotMonitor.Agent.V2.Core.Security;
 using AutopilotMonitor.Agent.V2.Core.Tests.Harness;
+using AutopilotMonitor.Agent.V2.Core.Tests.Transport;
 using AutopilotMonitor.Shared.Models;
 using Xunit;
 
@@ -261,8 +262,14 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Security
         }
 
         [Fact]
-        public void RecordFailure_endpoint_unavailable_suppresses_distress_but_still_counts()
+        public void RecordFailure_only_the_stopped_app_page_counts_without_distress()
         {
+            // Rewritten deliberately for the client-certificate interception plan: the former
+            // "endpoint unavailable" flag covered every HTML platform page, so the platform's
+            // "Client Certificate Required" page (TLS inspection on the path) shut healthy agents
+            // down. Now only the stopped-app page keeps that semantics — it counts toward the
+            // shutdown (a dead endpoint must not retry forever) without a distress report that
+            // could not reach it — while the certificate page never counts (tests below).
             var clock = new FakeClock(new DateTime(2026, 4, 21, 10, 0, 0, DateTimeKind.Utc));
             var fakeDistress = new FakeDistressReporter();
             var tracker = new AuthFailureTracker(maxFailures: 2, timeoutMinutes: 0, clock, NewLogger(), fakeDistress);
@@ -270,19 +277,19 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Security
             int events = 0;
             tracker.ThresholdExceeded += (_, _) => events++;
 
-            // Platform-403s from a stopped endpoint: a distress report cannot reach it and the
-            // DeviceNotRegistered classification would be wrong — nothing must be dispatched.
-            tracker.RecordFailure(403, "agent/config", endpointUnavailable: true);
-            tracker.RecordFailure(403, "agent/register-session", endpointUnavailable: true);
+            tracker.RecordFailure(403, "agent/config", InterceptionFixtures.CertificateRequired());
+            Assert.Equal(0, tracker.ConsecutiveFailures);
+
+            tracker.RecordFailure(403, "agent/config", InterceptionFixtures.StoppedApp());
+            tracker.RecordFailure(403, "agent/register-session", InterceptionFixtures.StoppedApp());
 
-            Assert.Empty(fakeDistress.Calls);
-            // The shutdown thresholds still apply — a dead endpoint must not retry forever.
             Assert.Equal(2, tracker.ConsecutiveFailures);
             Assert.Equal(1, events);
+            Assert.DoesNotContain(fakeDistress.Calls, c => c.ErrorType == DistressErrorType.DeviceNotRegistered);
         }
 
         [Fact]
-        public void RecordFailure_endpoint_unavailable_does_not_consume_streak_report_slot()
+        public void RecordFailure_stopped_app_page_does_not_consume_streak_report_slot()
         {
             var clock = new FakeClock(new DateTime(2026, 4, 21, 10, 0, 0, DateTimeKind.Utc));
             var fakeDistress = new FakeDistressReporter();
@@ -290,7 +297,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Security
 
             // The streak opens with a platform-403 (no dispatch), then a live backend answers
             // with a genuine 403 — that one must still produce the streak's single report.
-            tracker.RecordFailure(403, "agent/config", endpointUnavailable: true);
+            tracker.RecordFailure(403, "agent/config", InterceptionFixtures.StoppedApp());
             tracker.RecordFailure(403, "agent/config");
             tracker.RecordFailure(403, "agent/config");
 
@@ -298,6 +305,133 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Security
             Assert.Equal(DistressErrorType.DeviceNotRegistered, fakeDistress.Calls[0].ErrorType);
         }
 
+        // ============================================================= Foreign answers (interception)
+
+        [Fact]
+        public void RecordFailure_foreign_never_reaches_the_threshold()
+        {
+            var clock = new FakeClock(new DateTime(2026, 4, 21, 10, 0, 0, DateTimeKind.Utc));
+            var tracker = new AuthFailureTracker(maxFailures: 5, timeoutMinutes: 10, clock, NewLogger(), new FakeDistressReporter());
+
+            int events = 0;
+            tracker.ThresholdExceeded += (_, _) => events++;
+
+            for (int i = 0; i < 10; i++)
+            {
+                tracker.RecordFailure(403, "agent/telemetry", InterceptionFixtures.CertificateRequired());
+                clock.Now = clock.Now.AddMinutes(3); // also past the time window
+            }
+
+            Assert.Equal(0, events);
+            Assert.Equal(0, tracker.ConsecutiveFailures);
+        }
+
+        [Fact]
+        public void RecordFailure_foreign_dispatches_one_ClientCertificateNotReceived_per_process()
+        {
+            var clock = new FakeClock(new DateTime(2026, 4, 21, 10, 0, 0, DateTimeKind.Utc));
+            var fakeDistress = new FakeDistressReporter();
+            var tracker = new AuthFailureTracker(maxFailures: 5, timeoutMinutes: 0, clock, NewLogger(), fakeDistress);
+
+            tracker.RecordFailure(403, "agent/register-session", InterceptionFixtures.CertificateRequired());
+            tracker.RecordFailure(403, "agent/telemetry", InterceptionFixtures.CertificateRequired());
+            tracker.RecordSuccess();   // a success re-arms the streak report, never the per-process one
+            tracker.RecordFailure(401, "agent/telemetry", InterceptionFixtures.CertificateRequired(401));
+
+            var call = Assert.Single(fakeDistress.Calls);
+            Assert.Equal(DistressErrorType.ClientCertificateNotReceived, call.ErrorType);
+            Assert.Equal(403, call.HttpStatusCode);
+            // Operation, status, sub-reason, page title, issuer — in that order, within the 256 budget.
+            Assert.StartsWith("agent/register-session http 403 client_certificate_required;", call.Message);
+            Assert.True(
+                call.Message.IndexOf(InterceptionFixtures.PlatformPageTitle, StringComparison.Ordinal) <
+                call.Message.IndexOf(InterceptionFixtures.InspectionIssuer, StringComparison.Ordinal));
+            Assert.True(call.Message.Length <= 256, $"distress message is {call.Message.Length} characters");
+        }
+
+        [Fact]
+        public void RecordFailure_foreign_within_a_backend_streak_neither_resets_nor_advances_it()
+        {
+            var clock = new FakeClock(new DateTime(2026, 4, 21, 10, 0, 0, DateTimeKind.Utc));
+            var fakeDistress = new FakeDistressReporter();
+            var tracker = new AuthFailureTracker(maxFailures: 3, timeoutMinutes: 0, clock, NewLogger(), fakeDistress);
+
+            int events = 0;
+            tracker.ThresholdExceeded += (_, _) => events++;
+
+            tracker.RecordFailure(403, "agent/telemetry");
+            tracker.RecordFailure(403, "agent/telemetry");
+            tracker.RecordFailure(403, "agent/telemetry", InterceptionFixtures.CertificateRequired());
+            tracker.RecordFailure(403, "agent/telemetry", InterceptionFixtures.CertificateRequired());
+
+            Assert.Equal(2, tracker.ConsecutiveFailures);
+            Assert.Equal(0, events);
+
+            tracker.RecordFailure(403, "agent/telemetry");   // the third backend rejection trips it
+
+            Assert.Equal(3, tracker.ConsecutiveFailures);
+            Assert.Equal(1, events);
+            Assert.Equal(1, fakeDistress.Calls.Count(c => c.ErrorType == DistressErrorType.DeviceNotRegistered));
+        }
+
+        // ============================================================= Pending foreign distress
+
+        [Fact]
+        public void WaitForPendingForeignDistress_returns_at_once_when_nothing_was_dispatched()
+        {
+            var clock = new FakeClock(new DateTime(2026, 4, 21, 10, 0, 0, DateTimeKind.Utc));
+            var tracker = new AuthFailureTracker(maxFailures: 5, timeoutMinutes: 0, clock, NewLogger(), new FakeDistressReporter());
+
+            Assert.True(tracker.WaitForPendingForeignDistress(TimeSpan.Zero));
+        }
+
+        [Fact]
+        public void WaitForPendingForeignDistress_waits_for_the_send_to_finish()
+        {
+            var clock = new FakeClock(new DateTime(2026, 4, 21, 10, 0, 0, DateTimeKind.Utc));
+            Task? inFlight = null;
+            var fakeDistress = new FakeDistressReporter { Send = () => inFlight = Task.Delay(200) };
+            var tracker = new AuthFailureTracker(maxFailures: 5, timeoutMinutes: 0, clock, NewLogger(), fakeDistress);
+
+            tracker.RecordFailure(403, "agent/register-session", InterceptionFixtures.CertificateRequired());
+
+            Assert.True(tracker.WaitForPendingForeignDistress(TimeSpan.FromSeconds(10)));
+            Assert.True(inFlight!.IsCompleted);
+        }
+
+        [Fact]
+        public void WaitForPendingForeignDistress_stops_at_the_bound()
+        {
+            var clock = new FakeClock(new DateTime(2026, 4, 21, 10, 0, 0, DateTimeKind.Utc));
+            var neverSent = new TaskCompletionSource<bool>();
+            var fakeDistress = new FakeDistressReporter { Send = () => neverSent.Task };
+            var tracker = new AuthFailureTracker(maxFailures: 5, timeoutMinutes: 0, clock, NewLogger(), fakeDistress);
+            tracker.RecordFailure(403, "agent/register-session", InterceptionFixtures.CertificateRequired());
+
+            var watch = Stopwatch.StartNew();
+            var finished = tracker.WaitForPendingForeignDistress(TimeSpan.FromMilliseconds(100));
+            watch.Stop();
+
+            Assert.False(finished);
+            Assert.True(watch.Elapsed < TimeSpan.FromSeconds(5), $"waited {watch.Elapsed}");
+        }
+
+        [Fact]
+        public void WaitForPendingForeignDistress_never_waits_for_a_backend_streak_report()
+        {
+            // Only the ClientCertificateNotReceived send is kept: a failed start must not block
+            // on anything else.
+            var clock = new FakeClock(new DateTime(2026, 4, 21, 10, 0, 0, DateTimeKind.Utc));
+            var neverSent = new TaskCompletionSource<bool>();
+            var fakeDistress = new FakeDistressReporter { Send = () => neverSent.Task };
+            var tracker = new AuthFailureTracker(maxFailures: 5, timeoutMinutes: 0, clock, NewLogger(), fakeDistress);
+
+            tracker.RecordFailure(403, "agent/register-session");
+
+            Assert.Equal(DistressErrorType.DeviceNotRegistered, Assert.Single(fakeDistress.Calls).ErrorType);
+            Assert.True(tracker.WaitForPendingForeignDistress(TimeSpan.Zero));
+        }
+
         [Fact]
         public void RecordSuccess_rearms_distress_dispatch_for_the_next_streak()
         {
@@ -329,29 +463,6 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Security
             Assert.Equal(1, events);
         }
 
-        private sealed class FakeDistressReporter : DistressReporter
-        {
-            public sealed class Call
-            {
-                public DistressErrorType ErrorType { get; set; }
-                public string Message { get; set; } = default!;
-                public int? HttpStatusCode { get; set; }
-            }
-
-            public List<Call> Calls { get; } = new List<Call>();
-
-            public FakeDistressReporter()
-                : base(baseUrl: "https://example.test", tenantId: "t", manufacturer: "m", model: "d", serialNumber: "s", agentVersion: "0.0.0", logger: null!)
-            {
-            }
-
-            public override Task TrySendAsync(DistressErrorType errorType, string message, int? httpStatusCode = null)
-            {
-                Calls.Add(new Call { ErrorType = errorType, Message = message, HttpStatusCode = httpStatusCode });
-                return Task.CompletedTask;
-            }
-        }
-
         private sealed class FakeClock : AutopilotMonitor.DecisionCore.Engine.IClock
         {
             public DateTime Now { get; set; }

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Security/PayloadCatalogVerifierTests.cs

@@ -0,0 +1,142 @@
+using System.Collections.Generic;
+using System.IO;
+using AutopilotMonitor.Agent.V2.Core.Security;
+using AutopilotMonitor.Shared;
+using Xunit;
+
+namespace AutopilotMonitor.Agent.V2.Core.Tests.Security
+{
+    /// <summary>
+    /// The decision over what <c>Test-FileCatalog -Detailed</c> reports. The runspace itself is
+    /// exercised on a lab device (plan agent-payload-catalog, V1/V3), never in the test host.
+    /// </summary>
+    public sealed class PayloadCatalogVerifierTests
+    {
+        private const string OurSubject = "CN=glueckkanja AG, O=glueckkanja AG, L=Offenbach, S=Hessen, C=DE";
+
+        private static Dictionary<string, string> Files(params string[] namesAndHashes)
+        {
+            var map = new Dictionary<string, string>();
+            for (var i = 0; i < namesAndHashes.Length; i += 2) map[namesAndHashes[i]] = namesAndHashes[i + 1];
+            return map;
+        }
+
+        private static PayloadCatalogFacts Facts(
+            string status = "Valid", string? signatureStatus = "Valid", string? subject = OurSubject,
+            Dictionary<string, string>? catalog = null, Dictionary<string, string>? path = null)
+            => new PayloadCatalogFacts(status, signatureStatus, subject,
+                catalog ?? Files("a.dll", "AA"), path ?? Files("a.dll", "AA"));
+
+        private static PayloadCatalogVerdict Evaluate(PayloadCatalogFacts facts)
+            => PayloadCatalogVerifier.Evaluate(facts, Constants.CodeSigningPublisherPattern);
+
+        [Fact]
+        public void Signed_by_us_and_matching_is_accepted()
+        {
+            var verdict = Evaluate(Facts());
+
+            Assert.True(verdict.Accepted);
+            Assert.Null(verdict.Reason);
+        }
+
+        [Fact]
+        public void Matching_hashes_under_an_unsigned_catalog_are_rejected()
+        {
+            // Status covers the hashes only: an unsigned catalog over matching files reports Valid.
+            var verdict = Evaluate(Facts(signatureStatus: "NotSigned", subject: null));
+
+            Assert.False(verdict.Accepted);
+            Assert.Contains("catalog signature status NotSigned", verdict.Reason);
+        }
+
+        [Fact]
+        public void A_validly_signed_catalog_from_another_publisher_is_rejected()
+        {
+            var verdict = Evaluate(Facts(subject: "CN=Contoso Ltd, O=Contoso Ltd, C=US"));
+
+            Assert.False(verdict.Accepted);
+            Assert.Contains("does not match", verdict.Reason);
+        }
+
+        [Fact]
+        public void Missing_signature_details_are_a_rejection_not_a_pass()
+        {
+            Assert.False(Evaluate(Facts(signatureStatus: null, subject: null)).Accepted);
+            Assert.False(Evaluate(Facts(subject: "")).Accepted);
+        }
+
+        [Fact]
+        public void A_differing_payload_names_missing_extra_and_changed_files()
+        {
+            var verdict = Evaluate(Facts(
+                status: "ValidationFailed",
+                catalog: Files("a.dll", "AA", "b.dll", "BB", "c.config", "CC"),
+                path: Files("a.dll", "AA", "b.dll", "XX", "evil.dll", "EE")));
+
+            Assert.False(verdict.Accepted);
+            Assert.Contains("missing: c.config", verdict.Reason);
+            Assert.Contains("extra: evil.dll", verdict.Reason);
+            Assert.Contains("changed: b.dll", verdict.Reason);
+        }
+
+        [Fact]
+        public void Long_difference_lists_are_capped()
+        {
+            var path = Files("a.dll", "AA");
+            for (var i = 0; i < 12; i++) path[$"extra{i:00}.txt"] = "00";
+
+            var verdict = Evaluate(Facts(status: "ValidationFailed", path: path));
+
+            Assert.Contains("(+7 more)", verdict.Reason);
+        }
+
+        [Fact]
+        public void Signature_and_payload_problems_are_both_reported()
+        {
+            var verdict = Evaluate(Facts(status: "ValidationFailed", signatureStatus: "HashMismatch", subject: null,
+                path: Files("a.dll", "AA", "x.dll", "11")));
+
+            Assert.Contains("catalog signature status HashMismatch", verdict.Reason);
+            Assert.Contains("extra: x.dll", verdict.Reason);
+        }
+
+        [Theory]
+        [InlineData(OurSubject, true)]
+        [InlineData("cn=glueckkanja ag, o=glueckkanja ag, c=de", true)]   // -like is case-insensitive
+        [InlineData("CN=x, O=glueckkanja AG Holding, C=DE", true)]        // the pattern is open-ended by design
+        [InlineData("CN=glueckkanja AG, O=Contoso, C=DE", false)]
+        [InlineData("", false)]
+        [InlineData(null, false)]
+        public void Publisher_pattern_behaves_like_powershell_like(string? subject, bool expected)
+        {
+            Assert.Equal(expected, PayloadCatalogVerifier.MatchesPublisherPattern(subject, Constants.CodeSigningPublisherPattern));
+        }
+
+        [Fact]
+        public void Regex_metacharacters_in_the_pattern_are_literal()
+        {
+            Assert.True(PayloadCatalogVerifier.MatchesPublisherPattern("O=Json.NET (.NET Foundation)", "*O=Json.NET (.NET Foundation)*"));
+            Assert.False(PayloadCatalogVerifier.MatchesPublisherPattern("O=JsonXNET (.NET Foundation)", "*O=Json.NET (.NET Foundation)*"));
+        }
+
+        [Fact]
+        public void A_payload_without_catalog_is_rejected_before_any_runspace_starts()
+        {
+            var dir = Path.Combine(Path.GetTempPath(), "apm-catalog-test-" + System.Guid.NewGuid().ToString("N"));
+            Directory.CreateDirectory(dir);
+            try
+            {
+                File.WriteAllText(Path.Combine(dir, "readme.txt"), "x");
+
+                var verdict = PayloadCatalogVerifier.Verify(dir);
+
+                Assert.False(verdict.Accepted);
+                Assert.Contains("missing", verdict.Reason);
+            }
+            finally
+            {
+                Directory.Delete(dir, recursive: true);
+            }
+        }
+    }
+}

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Security/SessionIdPersistenceTests.cs

@@ -298,9 +298,50 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Security
             Assert.False(File.Exists(Path.Combine(tmp.Path, "registration-failure.json")));
         }
 
+        [Fact]
+        public void RecordRegistrationFailure_counts_intercepted_runs_and_keeps_the_latest_network_fingerprint()
+        {
+            using var tmp = new TempDirectory();
+            var sut = new SessionIdPersistence(tmp.Path);
+            var at = new DateTime(2026, 10, 12, 9, 0, 0, DateTimeKind.Utc);
+            var intercepted = FailedRun(at, outcome: "AuthFailed");
+            intercepted.InterceptedRuns = 1;
+
+            sut.RecordRegistrationFailure(intercepted, networkFingerprint: "fp-office");
+            sut.RecordRegistrationFailure(FailedRun(at.AddHours(1)), networkFingerprint: null);
+            var merged = sut.RecordRegistrationFailure(intercepted, networkFingerprint: "fp-home");
+
+            Assert.Equal(3, merged!.FailedRuns);
+            Assert.Equal(2, merged.InterceptedRuns);
+            var record = new SessionIdPersistence(tmp.Path).LoadRegistrationFailureRecord();
+            Assert.Equal(3, record!.Summary.FailedRuns);
+            Assert.Equal(2, record.Summary.InterceptedRuns);
+            Assert.Equal("fp-home", record.NetworkFingerprint);
+        }
+
+        [Fact]
+        public void A_record_from_an_agent_before_the_interception_buffer_still_loads()
+        {
+            using var tmp = new TempDirectory();
+            File.WriteAllText(Path.Combine(tmp.Path, "registration-failure.json"),
+                "{\"FailedRuns\":2,\"FirstFailedAtUtc\":\"2026-09-01T08:00:00Z\",\"LastFailedAtUtc\":\"2026-09-02T08:00:00Z\"," +
+                "\"Outcome\":\"AuthFailed\",\"LastError\":\"x\",\"NetworkLinkUpAtStart\":true,\"NetworkLinkUpAtEnd\":true," +
+                "\"AttemptWindowSeconds\":3.0,\"ConfigFetchOutcome\":\"FromCache\"}");
+
+            var record = new SessionIdPersistence(tmp.Path).LoadRegistrationFailureRecord();
+
+            Assert.Equal(2, record!.Summary.FailedRuns);
+            Assert.Equal(0, record.Summary.InterceptedRuns);
+            Assert.Null(record.NetworkFingerprint);
+            Assert.Equal(new DateTime(2026, 9, 1, 8, 0, 0, DateTimeKind.Utc), record.Summary.FirstFailedAtUtc);
+        }
+
         [Theory]
         [InlineData("not json")]
         [InlineData("{\"FailedRuns\":0}")]
+        [InlineData("null")]
+        [InlineData("[]")]
+        [InlineData("")]
         public void LoadRegistrationFailure_reports_nothing_for_a_corrupt_or_empty_record(string content)
         {
             using var tmp = new TempDirectory();

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Security/SessionRegistrationHelperTests.cs

@@ -6,6 +6,7 @@ using AutopilotMonitor.Agent.V2.Core.Logging;
 using AutopilotMonitor.Agent.V2.Core.Monitoring.Transport;
 using AutopilotMonitor.Agent.V2.Core.Security;
 using AutopilotMonitor.Agent.V2.Core.Tests.Harness;
+using AutopilotMonitor.Agent.V2.Core.Tests.Transport;
 using AutopilotMonitor.DecisionCore.Engine;
 using AutopilotMonitor.Shared.Models;
 using Xunit;
@@ -96,6 +97,36 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Security
             Assert.Equal(1, tracker.ConsecutiveFailures);
         }
 
+        [Fact]
+        public async Task Intercepted_registration_ends_auth_failed_without_counting_and_reports_once()
+        {
+            // Something on the network path answered (TLS inspection): the run still ends
+            // AuthFailed (exit 6, unchanged until the interception buffer exists), but the tracker
+            // does not count it and sends ClientCertificateNotReceived instead of DeviceNotRegistered.
+            using var tmp = new TempDirectory();
+            var logger = NewLogger(tmp);
+            var config = NewConfig();
+
+            var apiClient = new FakeApiClient(_ =>
+                throw new BackendAuthException("The device certificate did not reach the backend.", statusCode: 403,
+                    classification: InterceptionFixtures.CertificateRequired()));
+            var distress = new FakeDistressReporter();
+            var tracker = new AuthFailureTracker(maxFailures: 5, timeoutMinutes: 0,
+                clock: SystemClock.Instance, logger: logger, distressReporter: distress);
+
+            var result = await SessionRegistrationHelper.RegisterWithRetryAsync(
+                apiClient, config, agentVersion: "0.0.0", logger: logger, authFailureTracker: tracker,
+                networkLinkWait: _ => Task.CompletedTask);
+
+            Assert.Equal(SessionRegistrationOutcome.AuthFailed, result.Outcome);
+            Assert.Equal(403, result.HttpStatusCode);
+            Assert.Equal(1, apiClient.CallCount);
+            Assert.Equal(0, tracker.ConsecutiveFailures);
+            var call = Assert.Single(distress.Calls);
+            Assert.Equal(DistressErrorType.ClientCertificateNotReceived, call.ErrorType);
+            Assert.StartsWith("agent/register-session http 403 client_certificate_required", call.Message);
+        }
+
         // ── SESSION-OWNER-BINDING ────────────────────────────────────────────
 
         private static BackendAuthException OwnerMismatch()

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/SignalAdapters/RealmJoinWatcherAdapterTests.cs

@@ -479,14 +479,14 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.SignalAdapters
             public HashSet<string> ExistingKeys { get; } =
                 new HashSet<string>(StringComparer.OrdinalIgnoreCase);
 
-            public IReadOnlyList<string> Enumerate(RegistryHive hive, string packagesPath)
+            public IReadOnlyList<string> Enumerate(RegistryHive _, string packagesPath)
             {
                 return PackagesByPath.TryGetValue(packagesPath, out var ids)
                     ? (IReadOnlyList<string>)ids
                     : Array.Empty<string>();
             }
 
-            public bool TryRead(RegistryHive hive, string packagesPath, string packageId, out RealmJoinPackageSnapshot snapshot)
+            public bool TryRead(RegistryHive _, string _1, string packageId, out RealmJoinPackageSnapshot snapshot)
             {
                 snapshot = new RealmJoinPackageSnapshot(
                     packageId: packageId,
@@ -497,7 +497,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.SignalAdapters
                 return true;
             }
 
-            public bool KeyExists(RegistryHive hive, string subPath)
+            public bool KeyExists(RegistryHive _, string subPath)
                 => ExistingKeys.Contains(subPath);
         }
 

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Termination/EnrollmentTerminationHandlerTests.cs

@@ -165,6 +165,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Termination
             public IReadOnlyCollection<string> StarvedAlreadyReportedOverride { get; set; } = Array.Empty<string>();
             public List<string> TerminationActionLog { get; } = new List<string>();
             public TimeSpan SpoolDrainPeriodOverride { get; set; } = TimeSpan.Zero;
+            public int TerminalUploadAttemptRequests;
             // Session bc803955 — DevicePrep app-wave settle wait. Zero (default) disables the
             // wait so the existing timing-sensitive tests stay untouched; the dedicated settle
             // tests opt in with a real budget.
@@ -267,6 +268,12 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Termination
             public long IngressPendingSignalCount => _rig.IngressPendingSignalCountAccessor!();
             public bool CanObserveSpool => _rig.PendingItemCountAccessor != null;
             public int SpoolPendingItemCount => _rig.PendingItemCountAccessor!();
+
+            public void RequestTerminalUploadAttempt()
+            {
+                Interlocked.Increment(ref _rig.TerminalUploadAttemptRequests);
+                _rig.TerminationActionLog.Add("terminalUploadAttempt");
+            }
         }
 
         /// <summary>ARCH-F2 — recording shutdown gate (no real shutdown.exe in tests).</summary>
@@ -310,6 +317,19 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Termination
             new EnrollmentTerminatedEventArgs(
                 reason, outcome, stage.ToString(), at ?? EndUtc);
 
+        /// <summary>
+        /// The args <c>ServerControlPlane.OnTerminateRequested</c> synthesises for a
+        /// <c>terminate_session</c> action tagged with <paramref name="origin"/>.
+        /// </summary>
+        private static EnrollmentTerminatedEventArgs ServerArgs(string origin) =>
+            new EnrollmentTerminatedEventArgs(
+                EnrollmentTerminationReason.DecisionTerminalStage,
+                EnrollmentTerminationOutcome.Failed,
+                SessionStage.Failed.ToString(),
+                EndUtc,
+                details: "Server-requested termination",
+                origin: origin);
+
         [Fact]
         public void Handle_writes_final_status_json_in_state_directory()
         {
@@ -458,6 +478,99 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Termination
             Assert.Equal(0, rig.CleanupService.Invocations);
         }
 
+        // ============================================================= origin=session_gone (HTTP 410)
+
+        [Fact]
+        public void Handle_session_gone_skips_spool_drain_and_diagnostics_but_still_cleans_up()
+        {
+            // The backend no longer knows the session: every drain would only burn its budget on
+            // 410s and a diagnostics package would describe a deleted session. Marker, cleanup
+            // and the (forced) self-destruct still run.
+            using var rig = new Rig();
+            rig.State = new DecisionStateBuilder(DecisionState.CreateInitial("S1", "T1")) { Stage = SessionStage.Failed }.Build();
+            rig.SpoolDrainPeriodOverride = TimeSpan.FromSeconds(5);
+            var spoolPolls = 0;
+            rig.PendingItemCountAccessor = () => { spoolPolls++; return 5; }; // never drains — a poll would burn the budget
+            var cfg = rig.BuildConfig(diagEnabled: true, diagMode: "Always", selfDestruct: true);
+
+            rig.Build(cfg).Handle(sender: null!, ServerArgs(TerminationOrigins.SessionGone));
+
+            Assert.Equal(0, spoolPolls);
+            Assert.Equal(0, rig.TerminalUploadAttemptRequests);
+            Assert.Equal(0, rig.DiagnosticsUploads);
+            Assert.DoesNotContain(Constants.EventTypes.DiagnosticsCollecting, rig.EmittedEventTypes);
+            Assert.Contains(Constants.EventTypes.AgentShuttingDown, rig.EmittedEventTypes);
+            Assert.True(File.Exists(Path.Combine(rig.StateDir, "enrollment-complete.marker")));
+            Assert.Equal(1, rig.CleanupService.Invocations);
+            Assert.Equal(1, rig.ShutdownSignalled);
+        }
+
+        public enum TerminalExit { SelfDestruct, StandaloneReboot, WhiteGlovePart1 }
+
+        [Theory]
+        [InlineData(EnrollmentTerminationReason.DecisionTerminalStage, EnrollmentTerminationOutcome.Succeeded, SessionStage.Completed, TerminalExit.SelfDestruct)]
+        [InlineData(EnrollmentTerminationReason.DecisionTerminalStage, EnrollmentTerminationOutcome.Failed, SessionStage.Failed, TerminalExit.SelfDestruct)]
+        [InlineData(EnrollmentTerminationReason.StoppedWaiting, EnrollmentTerminationOutcome.TimedOut, SessionStage.AwaitingHello, TerminalExit.SelfDestruct)]
+        [InlineData(EnrollmentTerminationReason.MaxLifetimeExceeded, EnrollmentTerminationOutcome.TimedOut, SessionStage.AwaitingHello, TerminalExit.SelfDestruct)]
+        [InlineData(EnrollmentTerminationReason.DecisionTerminalStage, EnrollmentTerminationOutcome.Succeeded, SessionStage.Completed, TerminalExit.StandaloneReboot)]
+        [InlineData(EnrollmentTerminationReason.DecisionTerminalStage, EnrollmentTerminationOutcome.Succeeded, SessionStage.WhiteGloveSealed, TerminalExit.WhiteGlovePart1)]
+        public void Handle_while_uploads_are_intercepted_makes_one_terminal_attempt_then_exits_as_usual(
+            EnrollmentTerminationReason reason, EnrollmentTerminationOutcome outcome, SessionStage stage, TerminalExit exit)
+        {
+            // Enrollment end during an interception pause: no deferral. DrainSpool asks for the one
+            // terminal upload attempt, waits its bounded budget (the spool never empties — every
+            // upload is answered on the network path), then the exit runs exactly as for any
+            // session. Unsent telemetry is lost, as today.
+            using var rig = new Rig();
+            rig.State = new DecisionStateBuilder(DecisionState.CreateInitial("S1", "T1")) { Stage = stage }.Build();
+            rig.SpoolDrainPeriodOverride = TimeSpan.FromMilliseconds(200);
+            rig.PendingItemCountAccessor = () => 7;
+            rig.DiagnosticsResult = new DiagnosticsUploadResult
+            {
+                ErrorCode = "The device certificate did not reach the backend (TLS inspection or a proxy on the network path): 403 Forbidden ...",
+            };
+            var cfg = rig.BuildConfig(diagEnabled: true, diagMode: "Always", selfDestruct: exit != TerminalExit.StandaloneReboot);
+            cfg.RebootOnComplete = exit == TerminalExit.StandaloneReboot;
+
+            rig.Build(cfg).Handle(sender: null!, Args(reason, outcome, stage));
+
+            Assert.Equal(1, rig.TerminalUploadAttemptRequests);
+            Assert.Equal(1, rig.ShutdownSignalled);
+            Assert.True(rig.TerminationActionLog.IndexOf("terminalUploadAttempt") < rig.TerminationActionLog.IndexOf("signalShutdown"));
+            if (exit == TerminalExit.WhiteGlovePart1)
+            {
+                Assert.True(rig.SessionPersistence.IsWhiteGloveResume());
+                Assert.Equal(0, rig.CleanupService.Invocations);
+                return;
+            }
+
+            Assert.Equal(1, rig.DiagnosticsUploads);
+            Assert.Contains(Constants.EventTypes.DiagnosticsUploadFailed, rig.EmittedEventTypes);
+            Assert.True(File.Exists(Path.Combine(rig.StateDir, "enrollment-complete.marker")));
+            Assert.Equal(exit == TerminalExit.SelfDestruct ? 1 : 0, rig.CleanupService.Invocations);
+            Assert.Equal(exit == TerminalExit.StandaloneReboot ? 1 : 0, rig.RebootInvocations);
+        }
+
+        [Fact]
+        public void Handle_kill_signal_origin_still_drains_spool_and_uploads_diagnostics()
+        {
+            // The administrator kill signal keeps its full sequence — only session_gone skips.
+            using var rig = new Rig();
+            rig.State = new DecisionStateBuilder(DecisionState.CreateInitial("S1", "T1")) { Stage = SessionStage.Failed }.Build();
+            rig.SpoolDrainPeriodOverride = TimeSpan.FromSeconds(5);
+            var spoolPolls = 0;
+            rig.PendingItemCountAccessor = () => { spoolPolls++; return 0; };
+            var cfg = rig.BuildConfig(diagEnabled: true, diagMode: "Always", selfDestruct: true);
+
+            rig.Build(cfg).Handle(sender: null!, ServerArgs(TerminationOrigins.KillSignal));
+
+            Assert.True(spoolPolls > 0);
+            Assert.Equal(1, rig.DiagnosticsUploads);
+            Assert.Contains(Constants.EventTypes.DiagnosticsCollecting, rig.EmittedEventTypes);
+            Assert.Equal(1, rig.CleanupService.Invocations);
+            Assert.Equal(1, rig.ShutdownSignalled);
+        }
+
         [Fact]
         public void Handle_signals_shutdown_exactly_once_even_on_error()
         {

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Termination/ObservationCoverageTests.cs

@@ -107,7 +107,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Termination
         [Fact]
         public void Succeeded_outcome_is_an_info_about_tail_only_coverage_without_alarm_framing()
         {
-            // The 659c3a90 shape: healthy enrollment, bootstrap merely ran late in the ESP queue.
+            // The field shape: healthy enrollment, bootstrap merely ran late in the ESP queue.
             Describe(EnrollmentTerminationOutcome.Succeeded, "in_progress",
                 out var severity, out _, out var note);
 

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Transport/BackendApiClientAuthClassificationTests.cs

@@ -6,16 +6,19 @@ using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 using AutopilotMonitor.Agent.V2.Core.Monitoring.Transport;
+using AutopilotMonitor.Agent.V2.Core.Transport;
+using AutopilotMonitor.Shared.Models;
 using Xunit;
 
 namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
 {
     /// <summary>
-    /// 401/403 classification in <see cref="BackendApiClient"/>: a backend JSON 403 is a real
-    /// device-authorization verdict, while an HTML body means the response came from the Azure
-    /// platform / an edge proxy (stopped or retired app) and must NOT be reported as
-    /// "device is not authorized". Field case sits-d.cloud 2026-08-09: a pre-cutover agent hit
-    /// the stopped legacy Function App and support chased a non-existent authorization problem.
+    /// 401/403 classification in <see cref="BackendApiClient"/>: only a response that echoes the
+    /// request's correlation id is the backend's device-authorization verdict. The platform page of
+    /// a stopped app (field case 2026-08-09: a pre-cutover agent hit the stopped legacy Function App
+    /// and support chased a non-existent authorization problem) and anything answered on the network
+    /// path (TLS inspection: "Client Certificate Required", proxy pages) must NOT be reported as
+    /// "device is not authorized".
     /// </summary>
     public sealed class BackendApiClientAuthClassificationTests
     {
@@ -24,17 +27,32 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
             private readonly Func<HttpRequestMessage, HttpResponseMessage> _responder;
             public StubHandler(Func<HttpRequestMessage, HttpResponseMessage> responder) => _responder = responder;
 
+            public int Calls { get; private set; }
+
             protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
-                => Task.FromResult(_responder(request));
+            {
+                Calls++;
+                var response = _responder(request);
+                response.RequestMessage = request;   // as HttpClientHandler does
+                return Task.FromResult(response);
+            }
         }
 
-        private static BackendApiClient BuildClient(HttpStatusCode status, string body, string mediaType)
-        {
-            var handler = new StubHandler(_ => new HttpResponseMessage(status)
+        /// <param name="fromBackend">
+        /// True: the response echoes the request's X-Correlation-ID like the backend's middleware.
+        /// False: a platform or proxy answer without the echo.
+        /// </param>
+        private static StubHandler Answer(HttpStatusCode status, string body, string mediaType, bool fromBackend) =>
+            new StubHandler(request =>
             {
-                Content = new StringContent(body, Encoding.UTF8, mediaType)
+                var response = new HttpResponseMessage(status) { Content = new StringContent(body, Encoding.UTF8, mediaType) };
+                if (fromBackend && request.Headers.TryGetValues(ResponseOriginClassifier.CorrelationIdHeader, out var ids))
+                    response.Headers.TryAddWithoutValidation(ResponseOriginClassifier.CorrelationIdHeader, ids);
+                return response;
             });
-            return new BackendApiClient(
+
+        private static BackendApiClient BuildClient(HttpMessageHandler handler, ServerCertificateObserver? serverCertificates = null) =>
+            new BackendApiClient(
                 new HttpClient(handler),
                 baseUrl: "https://backend.example",
                 manufacturer: "Contoso",
@@ -43,8 +61,11 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
                 useBootstrapTokenAuth: false,
                 bootstrapToken: null,
                 agentVersion: "2.0.0",
-                logger: null);
-        }
+                logger: null,
+                serverCertificates: serverCertificates);
+
+        private static BackendApiClient BuildClient(HttpStatusCode status, string body, string mediaType, bool fromBackend = true) =>
+            BuildClient(Answer(status, body, mediaType, fromBackend));
 
         [Fact]
         public async Task Backend_json_403_is_reported_as_device_not_authorized()
@@ -134,16 +155,17 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
         public async Task Platform_html_403_is_reported_as_endpoint_unavailable_with_page_title()
         {
             using var client = BuildClient(
-                HttpStatusCode.Forbidden,
-                "<!DOCTYPE html><html><head><title>Web App - Unavailable</title></head><body>stopped</body></html>",
-                "text/html");
+                HttpStatusCode.Forbidden, InterceptionFixtures.StoppedAppPage, "text/html", fromBackend: false);
 
             var ex = await Assert.ThrowsAsync<BackendAuthException>(() => client.GetAgentConfigAsync("tenant-1"));
 
             Assert.Equal(403, ex.StatusCode);
             Assert.True(ex.EndpointUnavailable);
-            Assert.Contains("Web App - Unavailable", ex.Message);
+            Assert.False(ex.IsForeignResponse);
+            Assert.Equal(ResponseOrigin.PlatformStopped, ex.Origin);
+            Assert.Contains("HTML platform error page (\"Web App - Unavailable\")", ex.Message);
             Assert.Contains("NOT a device-authorization failure", ex.Message);
+            Assert.Contains("stale ApiBaseUrl", ex.Message);
             Assert.DoesNotContain("Check client certificate", ex.Message);
         }
 
@@ -153,7 +175,8 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
             using var client = BuildClient(
                 HttpStatusCode.Forbidden,
                 "  <html><body>Error 403 - This web app is stopped.</body></html>",
-                "text/plain");
+                "text/plain",
+                fromBackend: false);
 
             var ex = await Assert.ThrowsAsync<BackendAuthException>(() => client.GetAgentConfigAsync("tenant-1"));
 
@@ -161,6 +184,113 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
             Assert.Contains("HTML platform error page", ex.Message);
         }
 
+        // ── answered on the network path (TLS inspection, proxy) ─────────────
+
+        [Fact]
+        public async Task Certificate_required_page_says_the_certificate_did_not_reach_the_backend()
+        {
+            using var client = BuildClient(
+                HttpStatusCode.Forbidden, InterceptionFixtures.CertificateRequiredPage, "text/html", fromBackend: false);
+
+            var ex = await Assert.ThrowsAsync<BackendAuthException>(() => client.GetAgentConfigAsync("tenant-1"));
+
+            Assert.Equal(403, ex.StatusCode);
+            Assert.True(ex.IsForeignResponse);
+            Assert.False(ex.EndpointUnavailable);
+            Assert.Equal(ResponseClassification.ClientCertificateRequired, ex.Classification.ForeignReason);
+            Assert.Null(ex.ErrorCode);
+            // The cause leads: RegistrationFailureSummary.LastError keeps 256 characters.
+            Assert.StartsWith("The device certificate did not reach the backend (TLS inspection or a proxy on the network path)", ex.Message);
+            Assert.Contains("HTML platform error page (\"Web App - Unavailable\")", ex.Message);
+            Assert.True(ex.Message.IndexOf("Web App - Unavailable", StringComparison.Ordinal) < 256);
+            Assert.Contains("NOT a device-authorization failure", ex.Message);
+            Assert.DoesNotContain("stale ApiBaseUrl", ex.Message);
+            Assert.DoesNotContain("Check client certificate", ex.Message);
+        }
+
+        [Fact]
+        public async Task Proxy_page_keeps_the_phrase_and_title_ANALYZE_NET_001_matches()
+        {
+            using var client = BuildClient(
+                HttpStatusCode.Forbidden, InterceptionFixtures.ProxyPage, "text/html", fromBackend: false);
+
+            var ex = await Assert.ThrowsAsync<BackendAuthException>(
+                () => client.GetDiagnosticsUploadUrlAsync("tenant-1", "session-1", "package.zip"));
+
+            Assert.True(ex.IsForeignResponse);
+            Assert.Equal(ResponseClassification.ForeignResponse, ex.Classification.ForeignReason);
+            Assert.Contains("HTML platform error page (\"Example Gateway - Notification\")", ex.Message);
+            Assert.Contains("403", ex.Message);
+            Assert.DoesNotContain("stale ApiBaseUrl", ex.Message);
+        }
+
+        [Fact]
+        public async Task Json_403_without_the_echo_is_foreign_and_its_errorCode_is_ignored()
+        {
+            // An errorCode in a body the backend did not author must not drive a session rotation.
+            using var client = BuildClient(
+                HttpStatusCode.Forbidden,
+                "{\"success\":false,\"errorCode\":\"session_owner_mismatch\"}",
+                "application/json",
+                fromBackend: false);
+
+            var ex = await Assert.ThrowsAsync<BackendAuthException>(
+                () => client.RegisterSessionAsync(new AutopilotMonitor.Shared.Models.SessionRegistration()));
+
+            Assert.True(ex.IsForeignResponse);
+            Assert.Null(ex.ErrorCode);
+            Assert.Contains("a response without the backend's correlation echo", ex.Message);
+        }
+
+        [Fact]
+        public async Task Foreign_answer_carries_the_observed_server_certificate_issuer()
+        {
+            var observer = new ServerCertificateObserver();
+            using (var cert = ServerCertificateObserverTests.SelfSigned("CN=Example Inspection CA"))
+            {
+                observer.Validate(cert, System.Net.Security.SslPolicyErrors.None);
+            }
+            using var client = BuildClient(
+                Answer(HttpStatusCode.Forbidden, InterceptionFixtures.CertificateRequiredPage, "text/html", fromBackend: false),
+                observer);
+
+            var ex = await Assert.ThrowsAsync<BackendAuthException>(() => client.GetAgentConfigAsync("tenant-1"));
+
+            Assert.Equal("CN=Example Inspection CA", ex.Classification.ServerCertIssuer);
+        }
+
+        // ── agent/error: a report the backend never received is not delivered ──
+
+        [Theory]
+        [InlineData(HttpStatusCode.OK, true, true)]
+        [InlineData(HttpStatusCode.InternalServerError, true, true)]   // unchanged: only the round-trip counts
+        [InlineData(HttpStatusCode.Forbidden, true, true)]             // the backend answered
+        [InlineData(HttpStatusCode.Forbidden, false, false)]           // answered on the network path
+        [InlineData(HttpStatusCode.Unauthorized, false, false)]
+        public async Task ReportAgentError_counts_as_delivered_unless_the_backend_never_answered(
+            HttpStatusCode status, bool fromBackend, bool expectedDelivered)
+        {
+            using var client = BuildClient(status, InterceptionFixtures.CertificateRequiredPage, "text/html", fromBackend);
+
+            var delivered = await client.ReportAgentErrorAsync(new AgentErrorReport { TenantId = "tenant-1", SessionId = "session-1" });
+
+            Assert.Equal(expectedDelivered, delivered);
+        }
+
+        [Fact]
+        public async Task Intercepted_emergency_report_rolls_its_reservation_back()
+        {
+            var handler = Answer(HttpStatusCode.Forbidden, InterceptionFixtures.CertificateRequiredPage, "text/html", fromBackend: false);
+            using var client = BuildClient(handler);
+            var reporter = new EmergencyReporter(client, "session-1", "tenant-1", "2.0.0", logger: null);
+
+            await reporter.TrySendAsync(AgentErrorType.ConfigFetchFailed, "first");
+            await reporter.TrySendAsync(AgentErrorType.ConfigFetchFailed, "second");
+
+            // Not delivered → no dedup, no cooldown: the same key is attempted again.
+            Assert.Equal(2, handler.Calls);
+        }
+
         [Fact]
         public async Task Backend_401_keeps_authorization_message_and_status()
         {

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Transport/BackendTelemetryUploaderLoggingTests.cs

@@ -156,6 +156,38 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
             Assert.Contains("BackendTelemetryUploader: ingest PERMANENT", logContent);
         }
 
+        [Fact]
+        public async Task UploadBatch_logs_the_whole_interception_finding_at_warning()
+        {
+            // The old PERMANENT line carried the first 200 body characters, which ended before the
+            // platform's "Client Certificate Required" text. The INTERCEPTED line names the finding.
+            using var tmp = new TempDirectory();
+            var logger = new AgentLogger(tmp.Path, AgentLogLevel.Info);
+
+            var handler = new RecordingHttpMessageHandler();
+            handler.QueueForeign(HttpStatusCode.Forbidden, InterceptionFixtures.CertificateRequiredPage);
+            using var http = new HttpClient(handler) { Timeout = TimeSpan.FromSeconds(30) };
+
+            var sut = new BackendTelemetryUploader(
+                httpClient: http,
+                baseUrl: "https://backend.test",
+                tenantId: "T1",
+                logger: logger);
+
+            var result = await sut.UploadBatchAsync(new[] { NewEventItem(1) }, CancellationToken.None);
+            Assert.True(result.IsIntercepted);
+
+            Assert.True(handler.Captured[0].TryGetHeader("X-Correlation-ID", out var corr));
+            var logContent = ReadLogs(tmp.Path);
+            Assert.Contains("BackendTelemetryUploader: ingest INTERCEPTED", logContent);
+            Assert.Contains($"corr={corr}", logContent);
+            Assert.Contains("status=403", logContent);
+            Assert.Contains("reason=client_certificate_required", logContent);
+            Assert.Contains($"pageTitle=\"{InterceptionFixtures.PlatformPageTitle}\"", logContent);
+            Assert.Contains("serverCertIssuer=\"(unknown)\"", logContent);
+            Assert.DoesNotContain("ingest PERMANENT", logContent);
+        }
+
         [Fact]
         public async Task UploadBatch_empty_batch_no_log_no_network()
         {

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Transport/BackendTelemetryUploaderTests.cs

@@ -4,7 +4,16 @@ using System.Net;
 using System.Net.Http;
 using System.Threading;
 using System.Threading.Tasks;
+using AutopilotMonitor.Agent.V2.Core.Logging;
+using AutopilotMonitor.Agent.V2.Core.Monitoring.Telemetry.Periodic;
+using AutopilotMonitor.Agent.V2.Core.Monitoring.Transport;
+using AutopilotMonitor.Agent.V2.Core.Orchestration;
+using AutopilotMonitor.Agent.V2.Core.Security;
+using AutopilotMonitor.Agent.V2.Core.Tests.Harness;
+using AutopilotMonitor.Agent.V2.Core.Tests.Orchestration;
+using AutopilotMonitor.Agent.V2.Core.Transport;
 using AutopilotMonitor.Agent.V2.Core.Transport.Telemetry;
+using AutopilotMonitor.DecisionCore.Engine;
 using Newtonsoft.Json.Linq;
 using Xunit;
 using AutopilotMonitor.Shared.Models;
@@ -51,7 +60,10 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
                 string? model = "Latitude",
                 string? serial = "ABC123",
                 string? bootstrap = null,
-                string? version = "11.0.0")
+                string? version = "11.0.0",
+                AuthFailureTracker? tracker = null,
+                ServerCertificateObserver? serverCertificates = null,
+                NetworkMetrics? networkMetrics = null)
             {
                 Http = new HttpClient(Handler) { Timeout = TimeSpan.FromSeconds(30) };
                 Sut = new BackendTelemetryUploader(
@@ -62,7 +74,10 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
                     model: model,
                     serialNumber: serial,
                     bootstrapToken: bootstrap,
-                    agentVersion: version);
+                    agentVersion: version,
+                    authFailureTracker: tracker,
+                    serverCertificates: serverCertificates,
+                    networkMetrics: networkMetrics);
             }
 
             public void Dispose()
@@ -245,6 +260,85 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
             Assert.Null(result.ErrorReason);
         }
 
+        // ============================================================ 2xx without the correlation echo
+
+        [Fact]
+        public async Task Ok_with_the_echo_is_a_success_and_not_counted()
+        {
+            var metrics = new NetworkMetrics();
+            using var rig = new Rig(networkMetrics: metrics);
+            rig.Handler.QueueStatus(HttpStatusCode.OK);
+
+            var result = await rig.Sut.UploadBatchAsync(new[] { NewEventItem(1) }, CancellationToken.None);
+
+            Assert.True(result.Success);
+            Assert.Equal(0, metrics.OkWithoutEchoCount);
+        }
+
+        [Fact]
+        public async Task Ok_without_the_echo_is_still_a_success_and_only_counted()
+        {
+            // A 200 that did not come from the backend (e.g. a block page served with 200): the
+            // upload path behaves exactly as before — control signals are still read — and the
+            // only difference is the counter.
+            var metrics = new NetworkMetrics();
+            using var tmp = new TempDirectory();
+            var tracker = new AuthFailureTracker(maxFailures: 5, timeoutMinutes: 0, SystemClock.Instance,
+                new AgentLogger(System.IO.Path.Combine(tmp.Path, "logs"), AgentLogLevel.Info));
+            tracker.RecordFailure(403, "agent/telemetry");
+            using var rig = new Rig(tracker: tracker, networkMetrics: metrics);
+            rig.Handler.QueueForeign(HttpStatusCode.OK, "<html><title>Example</title></html>");
+            rig.Handler.QueueForeign(HttpStatusCode.OK, "{\"deviceKillSignal\":true}", mediaType: "application/json");
+
+            var page = await rig.Sut.UploadBatchAsync(new[] { NewEventItem(1) }, CancellationToken.None);
+            var signals = await rig.Sut.UploadBatchAsync(new[] { NewEventItem(2) }, CancellationToken.None);
+
+            Assert.True(page.Success);
+            Assert.Null(page.ErrorReason);
+            Assert.True(signals.Success);
+            Assert.True(signals.DeviceKillSignal);
+            Assert.Equal(0, tracker.ConsecutiveFailures); // a 2xx still resets the auth streak
+            Assert.Equal(2, metrics.OkWithoutEchoCount);
+        }
+
+        [Fact]
+        public async Task Answers_other_than_2xx_never_count_as_ok_without_echo()
+        {
+            var metrics = new NetworkMetrics();
+            using var rig = new Rig(networkMetrics: metrics);
+            rig.Handler.QueueForeign(HttpStatusCode.Forbidden, InterceptionFixtures.CertificateRequiredPage);
+            rig.Handler.QueueForeign(HttpStatusCode.ServiceUnavailable, "<html>busy</html>");
+
+            await rig.Sut.UploadBatchAsync(new[] { NewEventItem(1) }, CancellationToken.None);
+            await rig.Sut.UploadBatchAsync(new[] { NewEventItem(1) }, CancellationToken.None);
+
+            Assert.Equal(0, metrics.OkWithoutEchoCount);
+        }
+
+        [Fact]
+        public async Task The_count_reaches_the_agent_metrics_snapshot()
+        {
+            var metrics = new NetworkMetrics();
+            using var rig = new Rig(networkMetrics: metrics);
+            rig.Handler.QueueForeign(HttpStatusCode.OK, "<html><title>Example</title></html>");
+            await rig.Sut.UploadBatchAsync(new[] { NewEventItem(1) }, CancellationToken.None);
+
+            var sink = new FakeSignalIngressSink();
+            using var tmp = new TempDirectory();
+            var collector = new AgentSelfMetricsCollector(
+                sessionId: "S1",
+                tenantId: "T1",
+                post: new InformationalEventPost(sink, SystemClock.Instance),
+                networkMetrics: metrics,
+                logger: new AgentLogger(System.IO.Path.Combine(tmp.Path, "logs"), AgentLogLevel.Info),
+                agentVersion: "2.0.test");
+            collector.CollectSafe();
+
+            var snapshot = (IDictionary<string, object>)Assert.Single(sink.Posted, p =>
+                p.TypedPayload is IDictionary<string, object> d && d.ContainsKey("agent_version")).TypedPayload!;
+            Assert.Equal(1L, snapshot["telemetry_upload_ok_without_echo"]);
+        }
+
         [Theory]
         [InlineData(HttpStatusCode.Unauthorized)]
         [InlineData(HttpStatusCode.Forbidden)]
@@ -261,6 +355,104 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
             Assert.Contains(((int)status).ToString(), result.ErrorReason);
         }
 
+        // ============================================================ 401/403 origin
+
+        private sealed class OriginRig : IDisposable
+        {
+            private readonly TempDirectory _tmp = new TempDirectory();
+
+            public FakeDistressReporter Distress { get; } = new FakeDistressReporter();
+            public AuthFailureTracker Tracker { get; }
+            public Rig Upload { get; }
+
+            public OriginRig()
+            {
+                Tracker = new AuthFailureTracker(maxFailures: 5, timeoutMinutes: 0, SystemClock.Instance,
+                    new AgentLogger(_tmp.Path, AgentLogLevel.Info), Distress);
+                var serverCertificates = new ServerCertificateObserver();
+                using (var cert = ServerCertificateObserverTests.SelfSigned("CN=Example Inspection CA"))
+                {
+                    serverCertificates.Validate(cert, System.Net.Security.SslPolicyErrors.None);
+                }
+                Upload = new Rig(tracker: Tracker, serverCertificates: serverCertificates);
+            }
+
+            public Task<UploadResult> UploadAsync() => Upload.Sut.UploadBatchAsync(new[] { NewEventItem(1) }, CancellationToken.None);
+
+            public void Dispose()
+            {
+                Upload.Dispose();
+                _tmp.Dispose();
+            }
+        }
+
+        [Fact]
+        public async Task Backend_403_is_an_auth_failure_that_counts_and_reports_DeviceNotRegistered()
+        {
+            using var rig = new OriginRig();
+            rig.Upload.Handler.QueueStatus(HttpStatusCode.Forbidden, body: "{\"error\":\"Device validation failed\"}");
+
+            var result = await rig.UploadAsync();
+
+            Assert.True(result.IsAuthFailure);
+            Assert.False(result.IsIntercepted);
+            Assert.Equal(1, rig.Tracker.ConsecutiveFailures);
+            Assert.Equal(DistressErrorType.DeviceNotRegistered, Assert.Single(rig.Distress.Calls).ErrorType);
+        }
+
+        [Fact]
+        public async Task Stopped_app_403_counts_like_an_auth_failure_without_distress()
+        {
+            using var rig = new OriginRig();
+            rig.Upload.Handler.QueueForeign(HttpStatusCode.Forbidden, InterceptionFixtures.StoppedAppPage);
+
+            var result = await rig.UploadAsync();
+
+            Assert.True(result.IsAuthFailure);
+            Assert.False(result.IsIntercepted);
+            Assert.Equal(1, rig.Tracker.ConsecutiveFailures);
+            Assert.Empty(rig.Distress.Calls);
+        }
+
+        [Fact]
+        public async Task Certificate_required_403_is_intercepted_never_counted_and_reported_once()
+        {
+            using var rig = new OriginRig();
+            rig.Upload.Handler.QueueForeign(HttpStatusCode.Forbidden, InterceptionFixtures.CertificateRequiredPage);
+            rig.Upload.Handler.QueueForeign(HttpStatusCode.Forbidden, InterceptionFixtures.CertificateRequiredPage);
+
+            var result = await rig.UploadAsync();
+            await rig.UploadAsync();
+
+            Assert.False(result.Success);
+            Assert.True(result.IsIntercepted);
+            Assert.False(result.IsAuthFailure);
+            Assert.False(result.IsTransient);
+            Assert.Equal(403, result.Interception!.StatusCode);
+            Assert.Equal(ResponseClassification.ClientCertificateRequired, result.Interception.ForeignReason);
+            Assert.Equal(InterceptionFixtures.PlatformPageTitle, result.Interception.PageTitle);
+            Assert.Equal("CN=Example Inspection CA", result.Interception.ServerCertIssuer);
+            Assert.Equal(0, rig.Tracker.ConsecutiveFailures);
+            var distress = Assert.Single(rig.Distress.Calls);
+            Assert.Equal(DistressErrorType.ClientCertificateNotReceived, distress.ErrorType);
+            Assert.Contains("agent/telemetry http 403 client_certificate_required", distress.Message);
+            Assert.Contains("CN=Example Inspection CA", distress.Message);
+        }
+
+        [Fact]
+        public async Task Proxy_page_403_is_intercepted_as_foreign_response()
+        {
+            using var rig = new OriginRig();
+            rig.Upload.Handler.QueueForeign(HttpStatusCode.Forbidden, InterceptionFixtures.ProxyPage);
+
+            var result = await rig.UploadAsync();
+
+            Assert.True(result.IsIntercepted);
+            Assert.Equal(ResponseClassification.ForeignResponse, result.Interception!.ForeignReason);
+            Assert.Equal(InterceptionFixtures.ProxyPageTitle, result.Interception.PageTitle);
+            Assert.Equal(0, rig.Tracker.ConsecutiveFailures);
+        }
+
         [Theory]
         [InlineData(HttpStatusCode.BadRequest)]            // 400
         [InlineData(HttpStatusCode.NotFound)]              // 404
@@ -275,9 +467,44 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
 
             Assert.False(result.Success);
             Assert.False(result.IsTransient);
+            Assert.False(result.IsSessionGone);
             Assert.Contains(((int)status).ToString(), result.ErrorReason);
         }
 
+        [Fact]
+        public async Task Gone_410_maps_to_SessionGone()
+        {
+            // 410 = the backend no longer knows this session. Not transient (no retry), not auth,
+            // not poison, not a size problem — a distinct terminal kind the drain reacts to.
+            using var rig = new Rig();
+            rig.Handler.QueueStatus(HttpStatusCode.Gone, body: "session unknown");
+
+            var result = await rig.Sut.UploadBatchAsync(new[] { NewEventItem(1) }, CancellationToken.None);
+
+            Assert.False(result.Success);
+            Assert.True(result.IsSessionGone);
+            Assert.False(result.IsTransient);
+            Assert.False(result.IsAuthFailure);
+            Assert.False(result.IsPoison);
+            Assert.False(result.RequiresSplit);
+            Assert.Contains("410", result.ErrorReason);
+        }
+
+        [Fact]
+        public async Task Gone_410_with_poison_body_is_still_SessionGone_never_poison()
+        {
+            // A poison body on 410 must not be honoured: dropping items + emitting
+            // telemetry_upload_poisoned would only produce the next 410 (emit/reject loop).
+            using var rig = new Rig();
+            rig.Handler.QueueStatus(HttpStatusCode.Gone, body: "{\"poison\":true,\"rejectedRowKeys\":[\"rk1\"],\"reason\":\"x\"}");
+
+            var result = await rig.Sut.UploadBatchAsync(new[] { NewEventItem(1) }, CancellationToken.None);
+
+            Assert.True(result.IsSessionGone);
+            Assert.False(result.IsPoison);
+            Assert.Null(result.PoisonRowKeys);
+        }
+
         [Theory]
         [InlineData(HttpStatusCode.RequestTimeout)]    // 408
         [InlineData((HttpStatusCode)429)]              // TooManyRequests

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Transport/FakeBackendTelemetryUploader.cs

@@ -68,6 +68,23 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
             return this;
         }
 
+        public FakeBackendTelemetryUploader QueueSessionGone(string reason = "session gone: http 410")
+        {
+            _script.Enqueue(_ => UploadResult.SessionGone(reason));
+            return this;
+        }
+
+        /// <summary>Queues a 403 the platform's "Client Certificate Required" page answered (an interception).</summary>
+        public FakeBackendTelemetryUploader QueueIntercepted(int times = 1)
+        {
+            for (int i = 0; i < times; i++)
+            {
+                _script.Enqueue(_ => UploadResult.Intercepted(
+                    "intercepted: http 403 (client_certificate_required)", InterceptionFixtures.CertificateRequired()));
+            }
+            return this;
+        }
+
         public FakeBackendTelemetryUploader QueueThrow(Exception ex)
         {
             _script.Enqueue(_ => throw ex);

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Transport/InterceptionFixtures.cs

@@ -0,0 +1,48 @@
+using AutopilotMonitor.Agent.V2.Core.Transport;
+
+namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
+{
+    /// <summary>
+    /// Synthetic copies of the pages an agent gets instead of a backend answer: the Azure platform
+    /// page when no client certificate arrived, the platform page of a stopped app, and a proxy's
+    /// block page. Rebuilt from the observed structure and wording; none of them is a captured
+    /// artifact. The style block keeps the platform marker text past the first 200 characters, where
+    /// the old upload log excerpt ended.
+    /// </summary>
+    internal static class InterceptionFixtures
+    {
+        public const string PlatformPageTitle = "Web App - Unavailable";
+        public const string ProxyPageTitle = "Example Gateway - Notification";
+        public const string InspectionIssuer = "CN=Example Inspection CA, O=Example Security Ltd, C=US";
+
+        private const string PlatformPageHead =
+            "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\r\n" +
+            "<html xmlns=\"http://www.w3.org/1999/xhtml\">\r\n<head>\r\n<title>Web App - Unavailable</title>\r\n" +
+            "<style type=\"text/css\">\r\n  html { height: 100%; width: 100%; }\r\n" +
+            "  #content { margin: 0 auto; padding: 40px 0 0; font-family: \"Segoe UI\", Arial, sans-serif; }\r\n" +
+            "  h3 { color: #3a3a3a; font-size: 26px; font-weight: 300; }\r\n</style>\r\n</head>\r\n<body>\r\n<div id=\"content\">\r\n";
+
+        public const string CertificateRequiredPage =
+            PlatformPageHead +
+            "<h3>Error 403 - Forbidden: Client Certificate Required.</h3>\r\n" +
+            "<p>The web app you have attempted to reach requires a client certificate and does not accept any requests without one.</p>\r\n" +
+            "</div>\r\n</body>\r\n</html>\r\n";
+
+        public const string StoppedAppPage =
+            PlatformPageHead +
+            "<h3>Error 403 - This web app is stopped.</h3>\r\n" +
+            "<p>The web app you have attempted to reach is currently stopped and does not accept any requests.</p>\r\n" +
+            "</div>\r\n</body>\r\n</html>\r\n";
+
+        public const string ProxyPage =
+            "<!DOCTYPE html>\r\n<html><head><meta charset=\"utf-8\"><title>Example Gateway - Notification</title></head>\r\n" +
+            "<body><h1>Access blocked</h1><p>The request was blocked by the security policy of your organization.</p></body></html>\r\n";
+
+        /// <summary>The platform's "Client Certificate Required" page seen through an inspecting proxy.</summary>
+        public static ResponseClassification CertificateRequired(int statusCode = 403) =>
+            ResponseClassification.ForForeign(statusCode, ResponseClassification.ClientCertificateRequired, PlatformPageTitle, isHtml: true, InspectionIssuer);
+
+        public static ResponseClassification StoppedApp(int statusCode = 403) =>
+            ResponseClassification.ForPlatformStopped(statusCode, PlatformPageTitle, isHtml: true, serverCertIssuer: null);
+    }
+}

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Transport/RecordingHttpMessageHandler.cs

@@ -7,6 +7,7 @@ using System.Net.Http;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
+using AutopilotMonitor.Agent.V2.Core.Transport;
 
 namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
 {
@@ -23,17 +24,33 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
 
         public IReadOnlyList<CapturedRequest> Captured => _captured;
 
+        /// <summary>
+        /// Queues a response from the backend: like the backend's correlation middleware, it echoes
+        /// the request's <c>X-Correlation-ID</c> — the proof of origin a 401/403 is classified by.
+        /// </summary>
         public RecordingHttpMessageHandler QueueStatus(HttpStatusCode status, string? body = null)
         {
-            _script.Enqueue(_ =>
+            _script.Enqueue(request =>
             {
                 var resp = new HttpResponseMessage(status);
                 if (body != null) resp.Content = new StringContent(body, Encoding.UTF8, "application/json");
+                if (request.Headers.TryGetValues(ResponseOriginClassifier.CorrelationIdHeader, out var ids))
+                    resp.Headers.TryAddWithoutValidation(ResponseOriginClassifier.CorrelationIdHeader, ids);
                 return resp;
             });
             return this;
         }
 
+        /// <summary>
+        /// Queues a response that something on the network path produced (platform page, proxy
+        /// page): no correlation echo.
+        /// </summary>
+        public RecordingHttpMessageHandler QueueForeign(HttpStatusCode status, string body, string mediaType = "text/html")
+        {
+            _script.Enqueue(_ => new HttpResponseMessage(status) { Content = new StringContent(body, Encoding.UTF8, mediaType) });
+            return this;
+        }
+
         public RecordingHttpMessageHandler QueueThrow(Exception ex)
         {
             _script.Enqueue(_ => throw ex);

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Transport/ResponseOriginClassifierTests.cs

@@ -0,0 +1,173 @@
+#nullable enable
+using System.Net;
+using System.Net.Http;
+using System.Text;
+using System.Threading.Tasks;
+using AutopilotMonitor.Agent.V2.Core.Transport;
+using Xunit;
+
+namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
+{
+    /// <summary>
+    /// <see cref="ResponseOriginClassifier"/>: only the echo of the request's correlation id proves
+    /// that a 401/403 came from the backend. Fixtures are synthetic copies of the platform and proxy
+    /// pages (<see cref="InterceptionFixtures"/>).
+    /// </summary>
+    public sealed class ResponseOriginClassifierTests
+    {
+        private const string SentId = "0123456789abcdef0123456789abcdef";
+
+        private static HttpResponseMessage Response(HttpStatusCode status, string? body, string mediaType, string? echo = null)
+        {
+            var response = new HttpResponseMessage(status);
+            if (body != null) response.Content = new StringContent(body, Encoding.UTF8, mediaType);
+            if (echo != null) response.Headers.TryAddWithoutValidation(ResponseOriginClassifier.CorrelationIdHeader, echo);
+            return response;
+        }
+
+        private static ResponseClassification Classify(HttpResponseMessage response, string? issuer = null)
+        {
+            var body = ResponseOriginClassifier.ReadBodyPrefixAsync(response).GetAwaiter().GetResult();
+            return ResponseOriginClassifier.Classify(response, SentId, body, issuer);
+        }
+
+        [Fact]
+        public void Platform_certificate_required_page_is_foreign_client_certificate_required()
+        {
+            using var response = Response(HttpStatusCode.Forbidden, InterceptionFixtures.CertificateRequiredPage, "text/html");
+
+            var c = Classify(response, InterceptionFixtures.InspectionIssuer);
+
+            Assert.Equal(ResponseOrigin.Foreign, c.Origin);
+            Assert.True(c.IsForeign);
+            Assert.Equal(ResponseClassification.ClientCertificateRequired, c.ForeignReason);
+            Assert.Equal(InterceptionFixtures.PlatformPageTitle, c.PageTitle);
+            Assert.True(c.IsHtml);
+            Assert.Equal(403, c.StatusCode);
+            Assert.Equal(InterceptionFixtures.InspectionIssuer, c.ServerCertIssuer);
+        }
+
+        [Fact]
+        public void Platform_stopped_app_page_is_platform_stopped()
+        {
+            using var response = Response(HttpStatusCode.Forbidden, InterceptionFixtures.StoppedAppPage, "text/html");
+
+            var c = Classify(response);
+
+            Assert.Equal(ResponseOrigin.PlatformStopped, c.Origin);
+            Assert.False(c.IsForeign);
+            Assert.Null(c.ForeignReason);
+            Assert.Equal(InterceptionFixtures.PlatformPageTitle, c.PageTitle);
+        }
+
+        [Fact]
+        public void Proxy_page_is_foreign_response_with_its_title()
+        {
+            using var response = Response(HttpStatusCode.Forbidden, InterceptionFixtures.ProxyPage, "text/html");
+
+            var c = Classify(response);
+
+            Assert.Equal(ResponseOrigin.Foreign, c.Origin);
+            Assert.Equal(ResponseClassification.ForeignResponse, c.ForeignReason);
+            Assert.Equal(InterceptionFixtures.ProxyPageTitle, c.PageTitle);
+        }
+
+        [Fact]
+        public void Json_403_with_echoed_correlation_id_is_backend()
+        {
+            using var response = Response(HttpStatusCode.Forbidden, "{\"error\":\"Device validation failed\"}", "application/json", echo: SentId);
+
+            Assert.Equal(ResponseOrigin.Backend, Classify(response).Origin);
+        }
+
+        [Fact]
+        public void Json_403_without_echo_is_foreign_response()
+        {
+            using var response = Response(HttpStatusCode.Forbidden, "{\"error\":\"Device validation failed\"}", "application/json");
+
+            var c = Classify(response);
+
+            Assert.Equal(ResponseOrigin.Foreign, c.Origin);
+            Assert.Equal(ResponseClassification.ForeignResponse, c.ForeignReason);
+            Assert.False(c.IsHtml);
+            Assert.Null(c.PageTitle);
+        }
+
+        [Fact]
+        public void Html_page_with_echo_is_backend_because_the_header_wins()
+        {
+            using var response = Response(HttpStatusCode.Forbidden, InterceptionFixtures.CertificateRequiredPage, "text/html", echo: SentId);
+
+            Assert.Equal(ResponseOrigin.Backend, Classify(response).Origin);
+        }
+
+        [Fact]
+        public void Echo_of_another_request_id_is_not_proof()
+        {
+            using var response = Response(HttpStatusCode.Unauthorized, "{}", "application/json", echo: "ffffffffffffffffffffffffffffffff");
+
+            Assert.Equal(ResponseOrigin.Foreign, Classify(response).Origin);
+        }
+
+        [Fact]
+        public void No_sent_id_can_never_be_echoed()
+        {
+            using var response = Response(HttpStatusCode.Forbidden, "{}", "application/json", echo: SentId);
+
+            Assert.Equal(ResponseOrigin.Foreign, ResponseOriginClassifier.Classify(response, sentCorrelationId: null, bodyPrefix: "{}").Origin);
+        }
+
+        [Fact]
+        public void Markers_match_case_insensitively_and_in_plain_text()
+        {
+            using var stopped = Response(HttpStatusCode.Forbidden, "error 403 - this web app is stopped.", "text/plain");
+            using var certificate = Response(HttpStatusCode.Forbidden, "Forbidden: CLIENT CERTIFICATE REQUIRED", "text/plain");
+
+            Assert.Equal(ResponseOrigin.PlatformStopped, Classify(stopped).Origin);
+            var c = Classify(certificate);
+            Assert.Equal(ResponseClassification.ClientCertificateRequired, c.ForeignReason);
+            Assert.False(c.IsHtml);
+        }
+
+        [Fact]
+        public void Html_served_with_generic_content_type_is_sniffed()
+        {
+            using var response = Response(HttpStatusCode.Forbidden, "  <html><head><title>Blocked</title></head></html>", "text/plain");
+
+            var c = Classify(response);
+
+            Assert.True(c.IsHtml);
+            Assert.Equal("Blocked", c.PageTitle);
+        }
+
+        [Fact]
+        public void Page_title_is_capped_at_80_characters()
+        {
+            var longTitle = new string('x', 120);
+            using var response = Response(HttpStatusCode.Forbidden, $"<html><head><title>{longTitle}</title></head></html>", "text/html");
+
+            Assert.Equal(new string('x', 80), Classify(response).PageTitle);
+        }
+
+        [Fact]
+        public async Task Body_prefix_is_capped_and_a_marker_beyond_it_is_not_seen()
+        {
+            var body = new string(' ', ResponseOriginClassifier.MaxBodyChars) + "Client Certificate Required";
+            using var response = Response(HttpStatusCode.Forbidden, body, "text/plain");
+
+            var prefix = await ResponseOriginClassifier.ReadBodyPrefixAsync(response);
+
+            Assert.Equal(ResponseOriginClassifier.MaxBodyChars, prefix!.Length);
+            Assert.Equal(ResponseClassification.ForeignResponse, ResponseOriginClassifier.Classify(response, SentId, prefix).ForeignReason);
+        }
+
+        [Fact]
+        public async Task Missing_body_reads_as_null_and_classifies_as_foreign_response()
+        {
+            using var response = new HttpResponseMessage(HttpStatusCode.Forbidden);
+
+            Assert.Null(await ResponseOriginClassifier.ReadBodyPrefixAsync(response));
+            Assert.Equal(ResponseClassification.ForeignResponse, Classify(response).ForeignReason);
+        }
+    }
+}

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Transport/ServerCertificateObserverTests.cs

@@ -0,0 +1,94 @@
+#nullable enable
+using System;
+using System.Net.Http;
+using System.Net.Security;
+using System.Security.Cryptography;
+using System.Security.Cryptography.X509Certificates;
+using AutopilotMonitor.Agent.V2.Core.Transport;
+using Xunit;
+
+namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
+{
+    /// <summary>
+    /// <see cref="ServerCertificateObserver"/> must never weaken TLS validation: the installed
+    /// callback returns exactly the verdict .NET Framework applies without one
+    /// (<c>sslPolicyErrors == None</c>) and only records the issuer as evidence.
+    /// </summary>
+    public sealed class ServerCertificateObserverTests
+    {
+        internal static X509Certificate2 SelfSigned(string subject)
+        {
+            using (var rsa = RSA.Create(2048))
+            {
+                var request = new CertificateRequest(subject, rsa, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
+                return request.CreateSelfSigned(DateTimeOffset.UtcNow.AddDays(-1), DateTimeOffset.UtcNow.AddDays(1));
+            }
+        }
+
+        private static Func<HttpRequestMessage, X509Certificate2, X509Chain, SslPolicyErrors, bool> AttachedCallback(ServerCertificateObserver observer)
+        {
+            var handler = new HttpClientHandler();
+            observer.Attach(handler);
+            return handler.ServerCertificateCustomValidationCallback!;
+        }
+
+        [Theory]
+        [InlineData(SslPolicyErrors.None, true)]
+        [InlineData(SslPolicyErrors.RemoteCertificateNotAvailable, false)]
+        [InlineData(SslPolicyErrors.RemoteCertificateNameMismatch, false)]
+        [InlineData(SslPolicyErrors.RemoteCertificateChainErrors, false)]
+        [InlineData(SslPolicyErrors.RemoteCertificateNotAvailable | SslPolicyErrors.RemoteCertificateNameMismatch, false)]
+        [InlineData(SslPolicyErrors.RemoteCertificateNotAvailable | SslPolicyErrors.RemoteCertificateChainErrors, false)]
+        [InlineData(SslPolicyErrors.RemoteCertificateNameMismatch | SslPolicyErrors.RemoteCertificateChainErrors, false)]
+        [InlineData(SslPolicyErrors.RemoteCertificateNotAvailable | SslPolicyErrors.RemoteCertificateNameMismatch | SslPolicyErrors.RemoteCertificateChainErrors, false)]
+        public void Callback_accepts_only_a_certificate_without_policy_errors(SslPolicyErrors errors, bool expected)
+        {
+            using var certificate = SelfSigned("CN=Example Inspection CA");
+            var observer = new ServerCertificateObserver();
+            var callback = AttachedCallback(observer);
+
+            Assert.Equal(expected, callback(null!, certificate, null!, errors));
+            // Recorded whatever the verdict: a rejected inspection certificate is evidence too.
+            Assert.Equal(certificate.Issuer, observer.LastIssuer);
+        }
+
+        [Fact]
+        public void Last_validated_connection_wins()
+        {
+            using var first = SelfSigned("CN=Example Backend CA");
+            using var second = SelfSigned("CN=Example Inspection CA");
+            var observer = new ServerCertificateObserver();
+            var callback = AttachedCallback(observer);
+
+            Assert.Null(observer.LastIssuer);
+            callback(null!, first, null!, SslPolicyErrors.None);
+            callback(null!, second, null!, SslPolicyErrors.None);
+
+            Assert.Equal(second.Issuer, observer.LastIssuer);
+        }
+
+        [Fact]
+        public void Missing_certificate_is_rejected_and_keeps_the_last_issuer()
+        {
+            using var certificate = SelfSigned("CN=Example Backend CA");
+            var observer = new ServerCertificateObserver();
+            var callback = AttachedCallback(observer);
+            callback(null!, certificate, null!, SslPolicyErrors.None);
+
+            Assert.False(callback(null!, null!, null!, SslPolicyErrors.RemoteCertificateNotAvailable));
+            Assert.Equal(certificate.Issuer, observer.LastIssuer);
+        }
+
+        [Fact]
+        public void Long_issuer_is_capped()
+        {
+            using var certificate = SelfSigned($"CN=Example Inspection CA, O={new string('o', 200)}");
+            var observer = new ServerCertificateObserver();
+
+            observer.Validate(certificate, SslPolicyErrors.None);
+
+            Assert.Equal(ServerCertificateObserver.MaxIssuerLength, observer.LastIssuer!.Length);
+            Assert.StartsWith(observer.LastIssuer, certificate.Issuer, StringComparison.Ordinal);
+        }
+    }
+}

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Transport/TelemetrySpoolTests.cs

@@ -10,10 +10,15 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
 {
     public sealed class TelemetrySpoolTests
     {
-        private static TelemetryItemDraft EventDraft(string rowKey = "row-1") =>
+        private const string OwnKey = "tenant_session";
+        private const string ForeignKey = "tenant_old-session";
+
+        private static TelemetryItemDraft EventDraft(string rowKey = "row-1") => EventDraft(rowKey, OwnKey);
+
+        private static TelemetryItemDraft EventDraft(string rowKey, string partitionKey) =>
             new TelemetryItemDraft(
                 kind: TelemetryItemKind.Event,
-                partitionKey: "tenant_session",
+                partitionKey: partitionKey,
                 rowKey: rowKey,
                 payloadJson: "{\"EventType\":\"agent_started\"}",
                 isSessionScoped: true);
@@ -195,6 +200,86 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
             Assert.Equal(1, next.TelemetryItemId);
         }
 
+        // ============================================================ Startup partition-key filter
+
+        [Fact]
+        public void Ctor_drops_leading_pending_items_of_another_session_and_persists_cursor()
+        {
+            // Same spool directory, new session id: the previous session's unsent items would only
+            // draw a 410 that must not end the new session. They are dropped on startup; the own
+            // item behind them stays pending.
+            using var tmp = new TempDirectory();
+            var s1 = new TelemetrySpool(tmp.Path, Clock());
+            s1.Enqueue(EventDraft("old-a", ForeignKey));
+            s1.Enqueue(EventDraft("old-b", ForeignKey));
+            s1.Enqueue(EventDraft("own", OwnKey));
+
+            var s2 = new TelemetrySpool(tmp.Path, Clock(), expectedPartitionKey: OwnKey);
+
+            Assert.Equal(1, s2.LastUploadedItemId);
+            Assert.Equal(2, s2.LastAssignedItemId);
+            Assert.Equal(1, s2.PendingItemCount);
+            Assert.Equal("own", Assert.Single(s2.Peek(10)).RowKey);
+
+            // Cursor persisted: a later start without the filter sees the same tail with the same bytes.
+            var s3 = new TelemetrySpool(tmp.Path, Clock());
+            Assert.Equal(1, s3.LastUploadedItemId);
+            Assert.Equal(1, s3.PendingItemCount);
+            Assert.Equal(s3.PendingBytes, s2.PendingBytes);
+
+            var next = s2.Enqueue(EventDraft("next", OwnKey));
+            Assert.Equal(3, next.TelemetryItemId);
+        }
+
+        [Fact]
+        public void Ctor_drops_nothing_when_a_foreign_item_follows_an_own_item()
+        {
+            // Impossible by construction (one process = one session); if it happens the order is
+            // not trustworthy, so the filter keeps everything instead of guessing.
+            using var tmp = new TempDirectory();
+            var s1 = new TelemetrySpool(tmp.Path, Clock());
+            s1.Enqueue(EventDraft("old-a", ForeignKey));
+            s1.Enqueue(EventDraft("own", OwnKey));
+            s1.Enqueue(EventDraft("old-b", ForeignKey));
+
+            var s2 = new TelemetrySpool(tmp.Path, Clock(), expectedPartitionKey: OwnKey);
+
+            Assert.Equal(-1, s2.LastUploadedItemId);
+            Assert.Equal(3, s2.PendingItemCount);
+            Assert.Equal(s1.PendingBytes, s2.PendingBytes);
+        }
+
+        [Fact]
+        public void Ctor_keeps_pending_items_that_carry_the_expected_key()
+        {
+            // WhiteGlove Part 2 reuses the Part-1 session id: its leftovers carry the expected key.
+            using var tmp = new TempDirectory();
+            var s1 = new TelemetrySpool(tmp.Path, Clock());
+            s1.Enqueue(EventDraft("a", OwnKey));
+            s1.Enqueue(EventDraft("b", OwnKey));
+            s1.Enqueue(EventDraft("c", OwnKey));
+
+            var s2 = new TelemetrySpool(tmp.Path, Clock(), expectedPartitionKey: OwnKey);
+
+            Assert.Equal(-1, s2.LastUploadedItemId);
+            Assert.Equal(3, s2.PendingItemCount);
+            Assert.Equal(s1.PendingBytes, s2.PendingBytes);
+        }
+
+        [Fact]
+        public void Ctor_without_expected_key_keeps_foreign_items()
+        {
+            using var tmp = new TempDirectory();
+            var s1 = new TelemetrySpool(tmp.Path, Clock());
+            s1.Enqueue(EventDraft("old-a", ForeignKey));
+            s1.Enqueue(EventDraft("old-b", ForeignKey));
+
+            var s2 = new TelemetrySpool(tmp.Path, Clock());
+
+            Assert.Equal(-1, s2.LastUploadedItemId);
+            Assert.Equal(2, s2.PendingItemCount);
+        }
+
         [Fact]
         public void Enqueue_with_RequiresImmediateFlush_raises_ImmediateFlushRequested()
         {

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Transport/TelemetryUploadOrchestratorInterceptionTests.cs

@@ -0,0 +1,282 @@
+#nullable enable
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using AutopilotMonitor.Agent.V2.Core.Tests.Harness;
+using AutopilotMonitor.Agent.V2.Core.Transport;
+using AutopilotMonitor.Agent.V2.Core.Transport.Telemetry;
+using AutopilotMonitor.Shared.Models;
+using Xunit;
+
+namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
+{
+    /// <summary>
+    /// The transport-local pause after an intercepted upload (a 401/403 something on the network
+    /// path answered): no HTTP while it holds, backoff 30 s → 15 min, a success ends it, the
+    /// terminal phase gets exactly one attempt despite it, and it is never an auth failure.
+    /// Driven by the virtual clock — the pause is a "not before", never a timer.
+    /// </summary>
+    public sealed class TelemetryUploadOrchestratorInterceptionTests
+    {
+        private static readonly DateTime Start = new DateTime(2026, 10, 12, 10, 0, 0, DateTimeKind.Utc);
+
+        private sealed class Rig : IDisposable
+        {
+            private int _rowKey;
+
+            public TempDirectory Tmp { get; } = new TempDirectory();
+            public VirtualClock Clock { get; } = new VirtualClock(Start);
+            public FakeBackendTelemetryUploader Uploader { get; } = new FakeBackendTelemetryUploader();
+            public TelemetryUploadOrchestrator Sut { get; }
+
+            public Rig()
+            {
+                var spool = new TelemetrySpool(Tmp.Path, Clock);
+                Sut = new TelemetryUploadOrchestrator(spool, Uploader, Clock, batchSize: 10, retryBackoffs: new[] { TimeSpan.Zero });
+            }
+
+            public void Enqueue(int count = 1)
+            {
+                for (int i = 0; i < count; i++)
+                {
+                    var rowKey = (++_rowKey).ToString("D10");
+                    Sut.Enqueue(new TelemetryItemDraft(
+                        kind: TelemetryItemKind.Event,
+                        partitionKey: "T1_S1",
+                        rowKey: rowKey,
+                        payloadJson: "{}",
+                        isSessionScoped: true,
+                        requiresImmediateFlush: false));
+                }
+            }
+
+            public void Dispose() { Sut.Dispose(); Tmp.Dispose(); }
+        }
+
+        [Fact]
+        public async Task Intercepted_upload_retains_the_batch_and_later_drains_make_no_http_call()
+        {
+            using var rig = new Rig();
+            rig.Enqueue(2);
+            rig.Uploader.QueueIntercepted();
+
+            var first = await rig.Sut.DrainAllAsync();
+
+            Assert.Equal(1, rig.Uploader.CallCount);
+            Assert.Equal(1, first.FailedBatches);
+            Assert.Equal(0, first.UploadedItems);
+            Assert.Contains("intercepted", first.LastErrorReason);
+            Assert.Equal(-1, rig.Sut.LastUploadedItemId);
+            Assert.True(rig.Sut.IsInterceptionPaused);
+            Assert.False(rig.Sut.IsPaused);
+
+            // Periodic drains and immediate-flush wakeups (a new item, another drain) during the
+            // pause: no HTTP, and an expected state rather than another failed batch.
+            rig.Enqueue();
+            var paused = await rig.Sut.DrainAllAsync();
+            rig.Clock.Advance(TimeSpan.FromSeconds(29));
+            await rig.Sut.DrainAllAsync();
+
+            Assert.Equal(1, rig.Uploader.CallCount);
+            Assert.Equal(0, paused.FailedBatches);
+            Assert.Contains("upload intercepted, next attempt not before", paused.LastErrorReason);
+            Assert.Equal(-1, rig.Sut.LastUploadedItemId);
+        }
+
+        [Fact]
+        public async Task Backoff_runs_30s_1m_2m_5m_10m_then_15m_capped()
+        {
+            var expected = new[] { 30, 60, 120, 300, 600, 900, 900 }.Select(s => TimeSpan.FromSeconds(s)).ToArray();
+            Assert.Equal(expected.Take(6), TelemetryUploadOrchestrator.InterceptionBackoffs);
+
+            using var rig = new Rig();
+            rig.Enqueue();
+            rig.Uploader.QueueIntercepted(expected.Length);
+
+            foreach (var delay in expected)
+            {
+                var calls = rig.Uploader.CallCount;
+                await rig.Sut.DrainAllAsync();
+                Assert.Equal(calls + 1, rig.Uploader.CallCount);
+
+                rig.Clock.Advance(delay - TimeSpan.FromSeconds(1));
+                Assert.True(rig.Sut.IsInterceptionPaused);
+                await rig.Sut.DrainAllAsync();
+                Assert.Equal(calls + 1, rig.Uploader.CallCount);
+
+                rig.Clock.Advance(TimeSpan.FromSeconds(1));
+                Assert.False(rig.Sut.IsInterceptionPaused);
+            }
+        }
+
+        /// <summary>A clock that can be set back, as NTP does to a device that booted with a future RTC time.</summary>
+        private sealed class SettableClock : AutopilotMonitor.DecisionCore.Engine.IClock
+        {
+            public SettableClock(DateTime utcNow) { UtcNow = utcNow; }
+            public DateTime UtcNow { get; set; }
+            public Task Delay(TimeSpan delay, System.Threading.CancellationToken cancellationToken = default) => Task.CompletedTask;
+        }
+
+        [Fact]
+        public async Task Clock_set_back_past_the_pause_start_ends_the_pause_instead_of_stretching_it()
+        {
+            using var tmp = new TempDirectory();
+            var clock = new SettableClock(Start);
+            var uploader = new FakeBackendTelemetryUploader().QueueIntercepted(2);
+            using var sut = new TelemetryUploadOrchestrator(new TelemetrySpool(tmp.Path, clock), uploader, clock, retryBackoffs: new[] { TimeSpan.Zero });
+            sut.Enqueue(new TelemetryItemDraft(TelemetryItemKind.Event, "T1_S1", "0000000001", "{}", isSessionScoped: true));
+
+            await sut.DrainAllAsync();
+            clock.UtcNow = Start.AddHours(-2);
+
+            Assert.False(sut.IsInterceptionPaused);
+            await sut.DrainAllAsync();
+            Assert.Equal(2, uploader.CallCount);
+            Assert.True(sut.IsInterceptionPaused);   // re-armed from the corrected clock
+        }
+
+        [Fact]
+        public async Task Successful_upload_ends_the_pause_and_resets_the_backoff()
+        {
+            using var rig = new Rig();
+            rig.Enqueue(3);
+            rig.Uploader.QueueIntercepted(2).QueueOk().QueueIntercepted();
+
+            await rig.Sut.DrainAllAsync();                     // intercepted, 30 s
+            rig.Clock.Advance(TimeSpan.FromSeconds(30));
+            await rig.Sut.DrainAllAsync();                     // intercepted, 1 min
+            rig.Clock.Advance(TimeSpan.FromMinutes(1));
+            var cleared = await rig.Sut.DrainAllAsync();       // the path is clear
+
+            Assert.Equal(3, cleared.UploadedItems);
+            Assert.False(rig.Sut.IsInterceptionPaused);
+
+            rig.Enqueue();
+            await rig.Sut.DrainAllAsync();                     // intercepted again: back to 30 s
+            rig.Clock.Advance(TimeSpan.FromSeconds(29));
+            Assert.True(rig.Sut.IsInterceptionPaused);
+            rig.Clock.Advance(TimeSpan.FromSeconds(1));
+            Assert.False(rig.Sut.IsInterceptionPaused);
+        }
+
+        [Fact]
+        public async Task Terminal_drain_makes_exactly_one_attempt_despite_the_pause()
+        {
+            using var rig = new Rig();
+            rig.Enqueue();
+            rig.Uploader.QueueIntercepted(3);
+            await rig.Sut.DrainAllAsync();
+            Assert.Equal(1, rig.Uploader.CallCount);
+
+            Assert.True(rig.Sut.GrantTerminalAttempt());
+            var terminal = await rig.Sut.DrainAllAsync();
+
+            Assert.Equal(2, rig.Uploader.CallCount);
+            Assert.Equal(1, terminal.FailedBatches);
+            Assert.True(rig.Sut.IsInterceptionPaused);
+
+            // One attempt per process: a later terminal drain (orchestrator.Stop) honours the pause.
+            rig.Sut.GrantTerminalAttempt();
+            await rig.Sut.DrainAllAsync();
+            Assert.Equal(2, rig.Uploader.CallCount);
+        }
+
+        [Fact]
+        public async Task Terminal_attempt_that_gets_through_drains_everything()
+        {
+            using var rig = new Rig();
+            rig.Enqueue(25);
+            rig.Uploader.QueueIntercepted().QueueOk(3);
+            await rig.Sut.DrainAllAsync();
+
+            rig.Sut.GrantTerminalAttempt();
+            var terminal = await rig.Sut.DrainAllAsync();
+
+            Assert.Equal(25, terminal.UploadedItems);
+            Assert.Equal(4, rig.Uploader.CallCount);
+            Assert.Equal(24, rig.Sut.LastUploadedItemId);
+            Assert.False(rig.Sut.IsInterceptionPaused);
+        }
+
+        [Fact]
+        public async Task Grant_without_a_pause_changes_nothing_until_an_interception_meets_it()
+        {
+            using var rig = new Rig();
+            Assert.False(rig.Sut.GrantTerminalAttempt());
+            rig.Enqueue();
+            rig.Uploader.QueueOk().QueueIntercepted(3);
+
+            var normal = await rig.Sut.DrainAllAsync();
+            Assert.Equal(1, normal.UploadedItems);
+
+            rig.Enqueue();
+            await rig.Sut.DrainAllAsync();                     // intercepted during the terminal phase
+            await rig.Sut.DrainAllAsync();                     // the granted attempt
+            await rig.Sut.DrainAllAsync();                     // pause honoured again
+
+            Assert.Equal(3, rig.Uploader.CallCount);
+        }
+
+        [Fact]
+        public async Task DeviceBlocked_pause_still_skips_terminal_drains()
+        {
+            using var rig = new Rig();
+            rig.Enqueue();
+            rig.Uploader.QueueOkWithSignals(deviceBlocked: true, unblockAt: Start.AddMinutes(10));
+            await rig.Sut.DrainAllAsync();
+            Assert.True(rig.Sut.IsPaused);
+
+            rig.Enqueue();
+            Assert.False(rig.Sut.GrantTerminalAttempt());
+            var terminal = await rig.Sut.DrainAllAsync();
+
+            Assert.Equal(1, rig.Uploader.CallCount);
+            Assert.Contains("device blocked", terminal.LastErrorReason);
+        }
+
+        [Fact]
+        public async Task First_interception_is_reported_once_and_never_as_a_blocked_or_auth_failure()
+        {
+            using var rig = new Rig();
+            rig.Enqueue();
+            rig.Uploader.QueueIntercepted(2);
+            var reports = new List<InterceptionReport>();
+            var blocked = 0;
+            rig.Sut.UploadIntercepted += (_, r) => reports.Add(r);
+            rig.Sut.UploadBlocked += (_, __) => blocked++;
+
+            await rig.Sut.DrainAllAsync();
+            rig.Clock.Advance(TimeSpan.FromSeconds(30));
+            await rig.Sut.DrainAllAsync();
+
+            Assert.Equal(2, rig.Uploader.CallCount);
+            var report = Assert.Single(reports);
+            Assert.Equal(Start, report.FirstBlockedAtUtc);
+            Assert.Equal(ResponseClassification.ClientCertificateRequired, report.Interception.ForeignReason);
+            Assert.Equal(403, report.Interception.StatusCode);
+            Assert.Equal(InterceptionFixtures.InspectionIssuer, report.Interception.ServerCertIssuer);
+            Assert.Equal(0, blocked);
+        }
+
+        [Fact]
+        public async Task Permanent_block_report_keeps_its_own_once_per_process_gate()
+        {
+            using var rig = new Rig();
+            rig.Enqueue();
+            rig.Uploader.QueueIntercepted().QueuePermanent("http 400: contract").QueuePermanent("http 400: contract");
+            int intercepted = 0, blocked = 0;
+            rig.Sut.UploadIntercepted += (_, __) => intercepted++;
+            rig.Sut.UploadBlocked += (_, __) => blocked++;
+
+            await rig.Sut.DrainAllAsync();
+            rig.Clock.Advance(TimeSpan.FromSeconds(30));
+            await rig.Sut.DrainAllAsync();
+            await rig.Sut.DrainAllAsync();
+
+            Assert.Equal(3, rig.Uploader.CallCount);
+            Assert.Equal(1, intercepted);
+            Assert.Equal(1, blocked);
+        }
+    }
+}

src/Agent/AutopilotMonitor.Agent.V2.Core.Tests/Transport/TelemetryUploadOrchestratorTests.cs

@@ -10,10 +10,14 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
 {
     public sealed class TelemetryUploadOrchestratorTests
     {
-        private static TelemetryItemDraft Draft(string rowKey) =>
+        private const string OwnKey = "tenant_session";
+
+        private static TelemetryItemDraft Draft(string rowKey) => Draft(rowKey, OwnKey);
+
+        private static TelemetryItemDraft Draft(string rowKey, string partitionKey) =>
             new TelemetryItemDraft(
                 kind: TelemetryItemKind.Event,
-                partitionKey: "tenant_session",
+                partitionKey: partitionKey,
                 rowKey: rowKey,
                 payloadJson: $"{{\"rk\":\"{rowKey}\"}}",
                 isSessionScoped: true);
@@ -157,6 +161,118 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
             Assert.Equal(1, blockedCount);
         }
 
+        // ============================================================ HTTP 410 — session gone
+
+        [Fact]
+        public async Task SessionGone_for_current_session_stops_drain_retains_cursor_and_raises_once()
+        {
+            using var tmp = new TempDirectory();
+            var spool = new TelemetrySpool(tmp.Path, Clock());
+            spool.Enqueue(Draft("a"));
+            spool.Enqueue(Draft("b"));
+
+            var uploader = new FakeBackendTelemetryUploader().QueueSessionGone().QueueSessionGone();
+            using var sut = new TelemetryUploadOrchestrator(spool, uploader, Clock(), currentPartitionKey: OwnKey);
+            var gone = new System.Collections.Generic.List<string>();
+            int blockedCount = 0;
+            PoisonReport? poison = null;
+            sut.SessionGone += (_, reason) => gone.Add(reason);
+            sut.UploadBlocked += (_, __) => blockedCount++;
+            sut.BatchPoisoned += (_, p) => poison = p;
+
+            var first = await sut.DrainAllAsync();
+
+            Assert.False(first.Success);
+            Assert.Equal(1, first.FailedBatches);
+            Assert.Equal(0, first.UploadedItems);
+            Assert.Equal(1, uploader.CallCount);       // no retries — nothing can make a 410 succeed
+            Assert.Equal(-1, sut.LastUploadedItemId);  // retained — items stay on disk for the diag ZIP
+            Assert.Single(gone);
+            Assert.Contains("410", gone[0]);
+            Assert.Equal(0, blockedCount);             // not a "blocked" pipeline
+            Assert.Null(poison);
+
+            // One-shot: the next drain hits the 410 again but does not raise again.
+            var second = await sut.DrainAllAsync();
+            Assert.False(second.Success);
+            Assert.Equal(2, uploader.CallCount);
+            Assert.Equal(-1, sut.LastUploadedItemId);
+            Assert.Single(gone);
+            Assert.Equal(0, blockedCount);
+        }
+
+        [Fact]
+        public async Task SessionGone_for_leading_foreign_items_drops_only_them_and_continues()
+        {
+            // Leftovers of a previous session id at the head of the spool (defence in depth — the
+            // spool filters these at startup). A 410 for them must not end the current session:
+            // drop exactly the leading foreign run, then carry on with the current session's items.
+            using var tmp = new TempDirectory();
+            var spool = new TelemetrySpool(tmp.Path, Clock());
+            spool.Enqueue(Draft("old-a", "tenant_old-session"));
+            spool.Enqueue(Draft("old-b", "tenant_old-session"));
+            spool.Enqueue(Draft("new", OwnKey));
+
+            var uploader = new FakeBackendTelemetryUploader().QueueSessionGone().QueueOk();
+            using var sut = new TelemetryUploadOrchestrator(spool, uploader, Clock(), currentPartitionKey: OwnKey);
+            int goneCount = 0, blockedCount = 0;
+            sut.SessionGone += (_, __) => goneCount++;
+            sut.UploadBlocked += (_, __) => blockedCount++;
+
+            var result = await sut.DrainAllAsync();
+
+            Assert.True(result.Success);
+            Assert.Equal(0, result.FailedBatches);
+            Assert.Equal(1, result.UploadedItems);
+            Assert.Equal(2, uploader.CallCount);
+            Assert.Equal(3, uploader.Received[0].Count);              // first batch carried all three
+            Assert.Equal("new", Assert.Single(uploader.Received[1]).RowKey); // retry carried only the own item
+            Assert.Equal(2, sut.LastUploadedItemId);
+            Assert.Equal(0, goneCount);
+            Assert.Equal(0, blockedCount);
+        }
+
+        [Fact]
+        public async Task SessionGone_is_not_latched_before_a_handler_is_subscribed()
+        {
+            // The host subscribes after EnrollmentOrchestrator.Start; a 410 on the very first drain
+            // must still reach it on the next drain instead of being swallowed by the one-shot guard.
+            using var tmp = new TempDirectory();
+            var spool = new TelemetrySpool(tmp.Path, Clock());
+            spool.Enqueue(Draft("only"));
+
+            var uploader = new FakeBackendTelemetryUploader().QueueSessionGone().QueueSessionGone();
+            using var sut = new TelemetryUploadOrchestrator(spool, uploader, Clock(), currentPartitionKey: OwnKey);
+
+            await sut.DrainAllAsync();                 // nobody listening yet
+
+            int goneCount = 0;
+            sut.SessionGone += (_, __) => goneCount++;
+            await sut.DrainAllAsync();
+
+            Assert.Equal(1, goneCount);
+            Assert.Equal(-1, sut.LastUploadedItemId);
+        }
+
+        [Fact]
+        public async Task SessionGone_without_a_current_key_treats_every_batch_as_own()
+        {
+            using var tmp = new TempDirectory();
+            var spool = new TelemetrySpool(tmp.Path, Clock());
+            spool.Enqueue(Draft("x", "tenant_whatever"));
+
+            var uploader = new FakeBackendTelemetryUploader().QueueSessionGone();
+            using var sut = new TelemetryUploadOrchestrator(spool, uploader, Clock());
+            int goneCount = 0;
+            sut.SessionGone += (_, __) => goneCount++;
+
+            var result = await sut.DrainAllAsync();
+
+            Assert.False(result.Success);
+            Assert.Equal(1, goneCount);
+            Assert.Equal(-1, sut.LastUploadedItemId);
+        }
+
         [Fact]
         public async Task TooLarge_splits_batch_and_uploads_everything()
         {

src/Agent/AutopilotMonitor.Agent.V2.Core/AutopilotMonitor.Agent.V2.Core.csproj

@@ -62,8 +62,15 @@
   <ItemGroup>
     <Reference Include="System.Net.Http" />
     <Reference Include="System.Management" />
+    <!--
+      Compile against the GAC copy, never ship it (Private=false). The runtime binds this
+      strong-named assembly from the device's GAC before it probes the app folder, and every
+      Windows 10/11 has it (Windows PowerShell 5.1 runs on it), so a shipped copy was never
+      loaded. It was the build machine's file: unsigned on any other machine, and half the ZIP.
+    -->
     <Reference Include="System.Management.Automation">
       <HintPath>$(windir)\Microsoft.NET\assembly\GAC_MSIL\System.Management.Automation\v4.0_3.0.0.0__31bf3856ad364e35\System.Management.Automation.dll</HintPath>
+      <Private>false</Private>
     </Reference>
     <Reference Include="System.ServiceProcess" />
     <Reference Include="System.IO.Compression" />

src/Agent/AutopilotMonitor.Agent.V2.Core/Configuration/AgentConfiguration.cs

@@ -195,6 +195,14 @@ namespace AutopilotMonitor.Agent.V2.Core.Configuration
         /// </summary>
         public int AbsoluteMaxSessionHours { get; set; } = 48;
 
+        /// <summary>
+        /// Further boots the agent may try after a session registration was answered by a
+        /// 401/403 the backend did not author, before it cleans up like the emergency break.
+        /// Merged from remote config (also from the cache, since an intercepted start gets no
+        /// live config), clamped to 0..5. Default: 1.
+        /// </summary>
+        public int InterceptedRegistrationRetryBoots { get; set; } = 1;
+
         /// <summary>
         /// Bootstrap token for pre-MDM auth during OOBE.
         /// Embedded by the OOBE bootstrapper script via --bootstrap-token CLI arg.

src/Agent/AutopilotMonitor.Agent.V2.Core/Configuration/RemoteConfigMerger.cs

@@ -28,6 +28,12 @@ namespace AutopilotMonitor.Agent.V2.Core.Configuration
     /// </summary>
     public static class RemoteConfigMerger
     {
+        /// <summary>
+        /// Upper bound for <see cref="AgentConfiguration.InterceptedRegistrationRetryBoots"/>: each
+        /// extra boot keeps an intercepted device's agent installed until its next boot.
+        /// </summary>
+        private const int MaxInterceptedRegistrationRetryBoots = 5;
+
         /// <summary>
         /// Overwrites the relevant <paramref name="agentConfig"/> fields with values from
         /// <paramref name="remoteConfig"/>. Remote wins unconditionally for every field that has
@@ -174,6 +180,18 @@ namespace AutopilotMonitor.Agent.V2.Core.Configuration
             agentConfig.MaxAuthFailures = remoteConfig.MaxAuthFailures;
             agentConfig.AuthFailureTimeoutMinutes = remoteConfig.AuthFailureTimeoutMinutes;
 
+            // ---------------- Intercepted-registration buffer — null (a backend that predates the
+            //                  field) keeps the current value; anything else is clamped to
+            //                  0..MaxInterceptedRegistrationRetryBoots.
+            if (remoteConfig.InterceptedRegistrationRetryBoots.HasValue)
+            {
+                var requested = remoteConfig.InterceptedRegistrationRetryBoots.Value;
+                var bounded = Math.Max(0, Math.Min(MaxInterceptedRegistrationRetryBoots, requested));
+                if (bounded != requested)
+                    logger?.Warning($"Remote config: InterceptedRegistrationRetryBoots {requested} is outside 0..{MaxInterceptedRegistrationRetryBoots} — using {bounded}.");
+                agentConfig.InterceptedRegistrationRetryBoots = bounded;
+            }
+
             // ---------------- Nested CollectorConfiguration — only the two knobs that have a
             //                  V2 consumer on AgentConfiguration itself. The rest flow through
             //                  the untouched remoteConfig.Collectors to DefaultComponentFactory.

src/Agent/AutopilotMonitor.Agent.V2.Core/Configuration/RemoteConfigService.cs

@@ -21,7 +21,6 @@ namespace AutopilotMonitor.Agent.V2.Core.Configuration
         private readonly AgentLogger _logger;
         private readonly string _cacheFilePath;
         private readonly EmergencyReporter _emergencyReporter;
-        private readonly DistressReporter _distressReporter;
         private readonly AuthFailureTracker _authFailureTracker;
 
         private AgentConfigResponse _currentConfig;
@@ -46,7 +45,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Configuration
         /// Upper bound for the pre-fetch network-link wait on the initial startup fetch.
         /// Deliberately longer than the registration gate's 15s: the fetch runs FIRST after a
         /// boot-time relaunch, when Wi-Fi may still be associating (802.1X, OOBE), and a fetch
-        /// burned into a dead link strands the whole session on built-in defaults — tenant aebdce78
+        /// burned into a dead link strands the whole session on built-in defaults — kiosk-tenant
         /// audit 2026-08-24: ~50% of sessions lost their tenant config exactly this way.
         /// </summary>
         internal static readonly TimeSpan InitialFetchNetworkLinkWaitMax = TimeSpan.FromSeconds(60);
@@ -92,13 +91,12 @@ namespace AutopilotMonitor.Agent.V2.Core.Configuration
         /// </summary>
         public bool RecoveredAfterFetchFailure { get; private set; }
 
-        public RemoteConfigService(BackendApiClient apiClient, string tenantId, AgentLogger logger, EmergencyReporter emergencyReporter = null, DistressReporter distressReporter = null, AuthFailureTracker authFailureTracker = null)
+        public RemoteConfigService(BackendApiClient apiClient, string tenantId, AgentLogger logger, EmergencyReporter emergencyReporter = null, AuthFailureTracker authFailureTracker = null)
         {
             _apiClient = apiClient ?? throw new ArgumentNullException(nameof(apiClient));
             _tenantId = tenantId ?? throw new ArgumentNullException(nameof(tenantId));
             _logger = logger ?? throw new ArgumentNullException(nameof(logger));
             _emergencyReporter = emergencyReporter;
-            _distressReporter = distressReporter;
             _authFailureTracker = authFailureTracker;
 
             var cacheDir = Environment.ExpandEnvironmentVariables(@"%ProgramData%\AutopilotMonitor\Config");
@@ -180,10 +178,13 @@ namespace AutopilotMonitor.Agent.V2.Core.Configuration
                 {
                     // Auth failures are NOT retryable — 401/403 won't go away with another
                     // attempt; record + bail straight to cache/defaults so an operator can
-                    // see the AuthCertificateRejected/DeviceNotRegistered distress signal
-                    // without 100 s of needless retry delay.
-                    _logger.Warning($"Config fetch authentication failed: {ex.Message}");
-                    _authFailureTracker?.RecordFailure(ex.StatusCode, "agent/config", ex.EndpointUnavailable);
+                    // see the distress signal without 100 s of needless retry delay. A 401/403
+                    // from something on the network path is not counted by the tracker; it
+                    // reports ClientCertificateNotReceived instead.
+                    _logger.Warning(ex.IsForeignResponse
+                        ? $"Config fetch intercepted on the network path: {ex.Message}"
+                        : $"Config fetch authentication failed: {ex.Message}");
+                    _authFailureTracker?.RecordFailure(ex.StatusCode, "agent/config", ex.Classification);
                     lastException = ex;
                     LastFetchAuthStatusCode = ex.StatusCode;
                     break;

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Enrollment/Ime/ImeLogTracker.Handlers.cs

@@ -306,6 +306,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         {
             var currentStartTs = LastMatchedLogTimestamp ?? UtcNowProvider();
             var currentStartProvenance = CaptureLastMatchedProvenance();
+            var fromExecutor = string.Equals(source, "agentexecutor", StringComparison.OrdinalIgnoreCase);
 
             // A start line older than the result this policy already emitted is the late start
             // line of THAT run: its AgentExecutor block surfaced after the IME result — the two
@@ -318,7 +319,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
             // never tie; a low-resolution clock in a test may).
             if (_platformScriptResultEmitted.TryGetValue(id, out var emittedResultTs) && currentStartTs < emittedResultTs)
             {
-                RecordInvocationMarker(id, isClose: false);
+                RecordInvocationMarker(id, isClose: false, EmittedRunId);
                 NoteInvocationActivity();
                 _logger.Debug($"ImeLogTracker: platform script start line for {id} (source: {source ?? "ime"}) predates its emitted result — late line of that run, not a new one");
                 return;
@@ -326,7 +327,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
 
             if (_pendingPlatformScripts.TryGetValue(id, out var pendingSlot))
             {
-                if (pendingSlot.StartedAtUtc.HasValue && currentStartTs - pendingSlot.StartedAtUtc.Value > TimeSpan.FromHours(24))
+                if (pendingSlot.StartedAtUtc.HasValue && currentStartTs - pendingSlot.StartedAtUtc.Value > StalePlatformRunAge)
                 {
                     // Stale-slot hardening (session eaf3d8c4): a replayed start line from a previous
                     // enrollment whose matching result never appeared (script was mid-run when that
@@ -343,6 +344,15 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                     // Emit what the held run has; its end block did not surface in time.
                     EmitPlatformScriptResult(pendingSlot, "the next run of this policy started");
                 }
+                else if (fromExecutor && LastMatchedLogTimestamp.HasValue && pendingSlot.Result == null
+                    && pendingSlot.ExecutorStartedAtUtc.HasValue && pendingSlot.ExecutorStartedAtUtc.Value < currentStartTs)
+                {
+                    // Every executor process writes its start line once: a later one is the next run
+                    // (IME re-runs a failed script on a later check-in), whose end block must not
+                    // overwrite this one's. This run waits for its IME result — on the first pass
+                    // AgentExecutor.log is read in full before the IME log (session eff1b413).
+                    ParkPlatformRun(pendingSlot);
+                }
                 else if (!pendingSlot.StartedAtUtc.HasValue)
                 {
                     // The slot was opened by its result while the start block was still hidden;
@@ -351,9 +361,17 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                     pendingSlot.StartedAtProvenance = currentStartProvenance;
                     _stateDirty = true;
                 }
-                if (pendingSlot.UserId == null && userId != null) pendingSlot.UserId = userId;
             }
-            if (!_pendingPlatformScripts.ContainsKey(id))
+            if (_pendingPlatformScripts.TryGetValue(id, out var slot))
+            {
+                if (slot.UserId == null && userId != null) slot.UserId = userId;
+                if (fromExecutor && !slot.ExecutorStartedAtUtc.HasValue)
+                {
+                    slot.ExecutorStartedAtUtc = currentStartTs;
+                    _stateDirty = true;
+                }
+            }
+            else
             {
                 // A fresh start for this policy (no pending entry) begins a NEW execution.
                 // Clear any emitted-marker from a prior run so IME re-evaluations / retries of
@@ -361,18 +379,21 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                 // deduped away. A start line of the emitted run itself never reaches this point
                 // (the guard above), so this never clears the current run's own marker.
                 _platformScriptResultEmitted.Remove(id);
-                _pendingPlatformScripts[id] = new ScriptExecutionState
+                slot = new ScriptExecutionState
                 {
                     PolicyId = id,
                     ScriptType = "platform",
                     UserId = userId,
+                    RunId = NewRunId(),
                     // Prefer the source CMTrace timestamp so a script that started before the
                     // agent launched (replayed log content) is dated to its real start, not now.
                     // Set only at slot creation: the start line fires twice (agentexecutor + ime
                     // source) but the earliest wins.
                     StartedAtUtc = currentStartTs,
                     StartedAtProvenance = currentStartProvenance,
+                    ExecutorStartedAtUtc = fromExecutor ? currentStartTs : (DateTime?)null,
                 };
+                _pendingPlatformScripts[id] = slot;
                 ScriptRuns.NoteStarted(userId, id, UtcNowProvider());
                 // Live "running" indicator — same signal health scripts emit. Gated on slot
                 // creation so the duplicate start line (agentexecutor + ime source) doesn't
@@ -380,7 +401,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                 try { OnScriptStarted?.Invoke(new ScriptStartedInfo { PolicyId = id, ScriptType = "platform" }); }
                 catch (Exception ex) { _logger.Warning($"ImeLogTracker: OnScriptStarted handler threw: {ex.Message}"); }
             }
-            RecordInvocationMarker(id, isClose: false);
+            RecordInvocationMarker(id, isClose: false, LastMatchedLogTimestamp.HasValue ? RunIdOfStartLine(slot, fromExecutor, currentStartTs) : slot.RunId);
             NoteInvocationActivity();
             // Started lines fire twice per script (agentexecutor + ime source) and carry no
             // outcome — the matching `platform script completed` line below carries result+exit
@@ -388,6 +409,34 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
             _logger.Debug($"ImeLogTracker: platform script started: {id} (source: {source ?? "ime"})");
         }
 
+        /// <summary>How long after IME's "Script file … is generated" line its executor writes its start line (about 2 s).</summary>
+        private static readonly TimeSpan ImeLaunchWindow = TimeSpan.FromMinutes(1);
+
+        /// <summary>
+        /// The run a timestamped start line belongs to, for its invocation marker. An executor start line belongs to the
+        /// slot unless it is older than the slot's executor start — re-read behind a later run — then to the parked run
+        /// it started. IME's "Script file … is generated" precedes its executor: it belongs to the live run whose
+        /// executor started within <see cref="ImeLaunchWindow"/> after it, else to a slot whose executor has not
+        /// started yet; otherwise its run is not known (yet) and the lines behind it go nowhere.
+        /// </summary>
+        private string RunIdOfStartLine(ScriptExecutionState slot, bool fromExecutor, DateTime lineTs)
+        {
+            if (fromExecutor)
+            {
+                if (!slot.ExecutorStartedAtUtc.HasValue || slot.ExecutorStartedAtUtc.Value <= lineTs) return slot.RunId;
+                var parked = _parkedPlatformScripts.FirstOrDefault(r =>
+                    string.Equals(r.PolicyId, slot.PolicyId, StringComparison.OrdinalIgnoreCase) && r.ExecutorStartedAtUtc == lineTs);
+                return parked?.RunId ?? EmittedRunId;
+            }
+
+            var launched = LivePlatformRuns(slot.PolicyId)
+                .Where(r => r.ExecutorStartedAtUtc.HasValue && r.ExecutorStartedAtUtc.Value >= lineTs && r.ExecutorStartedAtUtc.Value - lineTs <= ImeLaunchWindow)
+                .OrderBy(r => r.ExecutorStartedAtUtc.Value)
+                .FirstOrDefault();
+            if (launched != null) return launched.RunId;
+            return slot.ExecutorStartedAtUtc.HasValue ? EmittedRunId : slot.RunId;
+        }
+
         // Routes line-by-line script-data handlers (context / exitCode / output) to the right
         // accumulator based on the pattern's scriptType parameter. Health-script lines feed the
         // single-slot _pendingHealthScript (the HS-NEW-RESULT JSON delivers the full cycle in one
@@ -502,13 +551,16 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
 
             // PS-AGENT-OUTPUT captures both stdout and stderr in one pattern
             var output = match.Groups["output"]?.Value;
-            var error = match.Groups["error"]?.Value;
+            var error = match.Groups["error"];
 
-            if (!string.IsNullOrEmpty(output) && !string.IsNullOrEmpty(error))
+            if (error != null && error.Success)
             {
-                // Combined pattern (write output done. output = ..., error = ...)
-                script.Stdout = TruncateOutput(output.Trim());
-                script.Stderr = TruncateOutput(error.Trim());
+                // Combined pattern (write output done. output = ..., error = ...): both texts as
+                // AgentExecutor wrote them to the result files — the error part is the error file
+                // IME judges. The "error from script" line before it is a snapshot taken before the
+                // output readers finished, so this one replaces it, an empty stdout included.
+                script.Stdout = TruncateOutput(output?.Trim());
+                script.Stderr = TruncateOutput(error.Value.Trim());
             }
             else if (string.Equals(outputType, "stderr", StringComparison.OrdinalIgnoreCase))
             {
@@ -556,49 +608,44 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         /// </summary>
         internal void CompletePlatformScriptFromImeResult(string policyId, string result, DateTime? resultLineTimestampUtc, string patternId, CmTraceLineProvenance resultProvenance, string userId = null)
         {
-            // Dedup: the deadline-based fallback (FlushPendingPlatformScriptResults) may already have
-            // emitted this script from its AgentExecutor exit code because IME's authoritative
-            // PS-SCRIPT-RESULT line arrived late. The fallback carries the same exit code + stdout,
-            // so re-emitting here would duplicate the timeline entry and inflate counts. Drop the
-            // now-redundant pending entry and skip.
-            if (_platformScriptResultEmitted.ContainsKey(policyId))
+            // The result belongs to the run of this policy that started last before its line —
+            // the run in flight, or an earlier one that waits for its result while a later run
+            // already started (ParkPlatformRun).
+            var script = FindRunForResult(policyId, userId, resultLineTimestampUtc);
+            if (script == null)
             {
-                _logger.Debug($"ImeLogTracker: platform script {policyId} PS-SCRIPT-RESULT arrived after fallback emit — skipping duplicate");
-                _pendingPlatformScripts.Remove(policyId);
-                return;
-            }
+                // Dedup: the deadline-based fallback (FlushPendingPlatformScriptResults) may already
+                // have emitted this run from its AgentExecutor end block because IME's authoritative
+                // PS-SCRIPT-RESULT line arrived late, or the same result line is read again.
+                // Re-emitting would duplicate the timeline entry and inflate counts.
+                if (_platformScriptResultEmitted.ContainsKey(policyId))
+                {
+                    _logger.Debug($"ImeLogTracker: platform script {policyId} PS-SCRIPT-RESULT arrived after its run was emitted — skipping duplicate");
+                    return;
+                }
 
-            // Merge with pending AgentExecutor data if available
-            if (_pendingPlatformScripts.TryGetValue(policyId, out var script))
-            {
-                // Stale-result guard: on an intra-lifetime re-run of the same policy, run 1's
-                // late PS-SCRIPT-RESULT can arrive after run 2's start line already created a
-                // fresh slot (the start clears the emitted-marker). Merging would pair run 2's
-                // StartedAtUtc/state with run 1's result and then drop run 2's genuine result at
-                // the marker check above. A result line always postdates its own run's start
-                // line in the source log, so a result older than the pending slot's start
-                // belongs to a previous run — drop it and keep the live slot intact.
-                if (script.StartedAtUtc.HasValue
-                    && resultLineTimestampUtc.HasValue
-                    && resultLineTimestampUtc.Value < script.StartedAtUtc.Value)
+                // Stale-result guard: every run of this policy in flight started after the result
+                // line — a result line always postdates its own run's start line in the source log,
+                // so it belongs to a previous run. Keep the live runs intact.
+                if (HasLivePlatformRun(policyId))
                 {
                     _logger.Debug($"ImeLogTracker: platform script {policyId} result predates the current run's start — stale result from a previous run, skipping");
                     return;
                 }
-            }
-            else
-            {
+
                 script = new ScriptExecutionState
                 {
                     PolicyId = policyId,
                     ScriptType = "platform",
                     UserId = userId,
+                    RunId = NewRunId(),
                 };
                 _pendingPlatformScripts[policyId] = script;
                 ScriptRuns.NoteStarted(userId, policyId, UtcNowProvider());
             }
 
             if (script.UserId == null && userId != null) script.UserId = userId;
+            ResolveParkedRunsBefore(script);
             script.Result = result;
             script.ResultSource = "ime_policy_result";
             script.ResultObservedAtUtc = resultLineTimestampUtc ?? UtcNowProvider();
@@ -627,21 +674,150 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         private void EmitPlatformScriptResult(ScriptExecutionState script, string note = null)
         {
             _logger.Info($"ImeLogTracker: platform script completed: {script.PolicyId}, result={script.Result}, exit={script.ExitCode}{(note != null ? $" ({note})" : string.Empty)}");
-            if (string.IsNullOrEmpty(script.RunId)) script.RunId = Guid.NewGuid().ToString("D");
+            if (string.IsNullOrEmpty(script.RunId)) script.RunId = NewRunId();
             EmitScriptEvent(script);
-            ScriptRuns.NoteEmitted(script, UtcNowProvider());
+            // The register keeps the latest run per (user, policy) for the registry reconciliation:
+            // a run that waited for its result while a later one started must not take that later
+            // run's entry.
+            if (!HasLaterLivePlatformRun(script)) ScriptRuns.NoteEmitted(script, UtcNowProvider());
             // The run's source stamp, capped at the clock: a result line cannot be read before it
             // was written, so a stamp ahead of the clock is a wrong zone assumption on that line
             // (a rewound result resolved in the reader's zone, session 4377911b: +1 h). Left
             // uncapped, the marker made the genuine NEXT run's start line read as a late line of
-            // this run and its result a duplicate.
+            // this run and its result a duplicate. Only ever raised: a run emitted after a later
+            // one must not move the reference back.
             var runStamp = script.ResultObservedAtUtc ?? script.ExitObservedAtUtc ?? UtcNowProvider();
             var nowUtc = UtcNowProvider();
-            _platformScriptResultEmitted[script.PolicyId] = runStamp > nowUtc ? nowUtc : runStamp;
-            _pendingPlatformScripts.Remove(script.PolicyId);
+            var stamp = runStamp > nowUtc ? nowUtc : runStamp;
+            if (!_platformScriptResultEmitted.TryGetValue(script.PolicyId, out var previousStamp) || stamp > previousStamp)
+                _platformScriptResultEmitted[script.PolicyId] = stamp;
+            if (_pendingPlatformScripts.TryGetValue(script.PolicyId, out var current) && ReferenceEquals(current, script))
+                _pendingPlatformScripts.Remove(script.PolicyId);
+            else
+                _parkedPlatformScripts.Remove(script);
             _stateDirty = true;
         }
 
+        private static string NewRunId() => Guid.NewGuid().ToString("D");
+
+        /// <summary>A run older than this by source time is from a previous enrollment, not a run in flight.</summary>
+        private static readonly TimeSpan StalePlatformRunAge = TimeSpan.FromHours(24);
+
+        private static bool SameUserOrUnknown(string a, string b)
+            => a == null || b == null || string.Equals(a, b, StringComparison.OrdinalIgnoreCase);
+
+        private static DateTime StartOf(ScriptExecutionState run) => run.StartedAtUtc ?? DateTime.MinValue;
+
+        /// <summary>The runs of a policy that are not emitted yet: the earlier ones waiting for their IME result, then the one in flight.</summary>
+        private IEnumerable<ScriptExecutionState> LivePlatformRuns(string policyId)
+        {
+            foreach (var run in _parkedPlatformScripts)
+            {
+                if (string.Equals(run.PolicyId, policyId, StringComparison.OrdinalIgnoreCase)) yield return run;
+            }
+            if (_pendingPlatformScripts.TryGetValue(policyId, out var current)) yield return current;
+        }
+
+        private bool HasLivePlatformRun(string policyId) => LivePlatformRuns(policyId).Any();
+
+        /// <summary>The live run a start marker names, or null once that run was emitted.</summary>
+        private ScriptExecutionState FindLivePlatformRun(string policyId, string runId)
+            => LivePlatformRuns(policyId).FirstOrDefault(r => string.Equals(r.RunId, runId, StringComparison.Ordinal));
+
+        private bool HasLaterLivePlatformRun(ScriptExecutionState script)
+            => LivePlatformRuns(script.PolicyId).Any(r => !ReferenceEquals(r, script)
+                && SameUserOrUnknown(r.UserId, script.UserId) && StartOf(r) > StartOf(script));
+
+        /// <summary>
+        /// The live run an IME result line belongs to: of the runs of its policy that started at or before the line,
+        /// the latest — one of the same IME user when there is one.
+        /// </summary>
+        private ScriptExecutionState FindRunForResult(string policyId, string userId, DateTime? resultLineTimestampUtc)
+        {
+            ScriptExecutionState sameUser = null, anyUser = null;
+            foreach (var run in LivePlatformRuns(policyId))
+            {
+                if (resultLineTimestampUtc.HasValue && run.StartedAtUtc.HasValue && run.StartedAtUtc.Value > resultLineTimestampUtc.Value) continue;
+                if (anyUser == null || StartOf(run) > StartOf(anyUser)) anyUser = run;
+                if (SameUserOrUnknown(run.UserId, userId) && (sameUser == null || StartOf(run) > StartOf(sameUser))) sameUser = run;
+            }
+            return sameUser ?? anyUser;
+        }
+
+        /// <summary>
+        /// Moves the run in flight aside when the next executor run of its policy starts: it keeps its own end block and
+        /// waits for its IME result (<see cref="FindRunForResult"/>), the exit-code fallback, or a later run's result.
+        /// </summary>
+        private void ParkPlatformRun(ScriptExecutionState run)
+        {
+            _pendingPlatformScripts.Remove(run.PolicyId);
+            _parkedPlatformScripts.Add(run);
+            _stateDirty = true;
+            if (_parkedPlatformScripts.Count > MaxParkedPlatformScripts)
+            {
+                var oldest = _parkedPlatformScripts.OrderBy(StartOf).First();
+                _logger.Warning($"ImeLogTracker: more than {MaxParkedPlatformScripts} platform runs wait for their IME result — resolving the oldest ({oldest.PolicyId}, started {oldest.StartedAtUtc:o}) now");
+                ResolveParkedRun(oldest, "too many runs waiting for their IME result");
+            }
+            _logger.Debug($"ImeLogTracker: platform script {run.PolicyId}: the next executor run started before IME's result of run {run.RunId} was read — that run keeps its end block and waits for its result");
+        }
+
+        /// <summary>
+        /// Results arrive in run order: a parked run of the same IME user that started before the run a result belongs to
+        /// gets none any more (its result line was lost) — it goes out now, ahead of the later run.
+        /// </summary>
+        private void ResolveParkedRunsBefore(ScriptExecutionState owner)
+        {
+            if (_parkedPlatformScripts.Count == 0 || !owner.StartedAtUtc.HasValue) return;
+            var earlier = _parkedPlatformScripts
+                .Where(r => !ReferenceEquals(r, owner)
+                    && string.Equals(r.PolicyId, owner.PolicyId, StringComparison.OrdinalIgnoreCase)
+                    && SameUserOrUnknown(r.UserId, owner.UserId)
+                    && r.StartedAtUtc.HasValue && r.StartedAtUtc.Value < owner.StartedAtUtc.Value)
+                .OrderBy(StartOf)
+                .ToList();
+            foreach (var run in earlier) ResolveParkedRun(run, "a later run of this policy got its IME result first");
+        }
+
+        /// <summary>A parked run that will not get its IME result: out with what it has, or dropped when it has nothing.</summary>
+        private void ResolveParkedRun(ScriptExecutionState run, string why)
+        {
+            if (run.Result != null)
+            {
+                EmitPlatformScriptResult(run, why);
+            }
+            else if (run.ExitCode.HasValue)
+            {
+                EmitFromExecutorEndBlock(run, why);
+            }
+            else
+            {
+                _parkedPlatformScripts.Remove(run);
+                _stateDirty = true;
+                _logger.Debug($"ImeLogTracker: platform script {run.PolicyId} run {run.RunId} has neither IME result nor executor end block — dropped ({why})");
+            }
+        }
+
+        /// <summary>
+        /// IME's own verdict from a run's end block: Success exactly when the error file was empty
+        /// (<c>IsNullOrEmpty(errorFile.Trim())</c> in IME), whatever the exit code — PowerShell returns 0 after a
+        /// non-terminating error and any code a script exits with. Only when the stderr line was never read does the
+        /// exit code stand in.
+        /// </summary>
+        internal static string ImeResultFromEndBlock(ScriptExecutionState script)
+        {
+            if (script.Stderr != null) return string.IsNullOrWhiteSpace(script.Stderr) ? "Success" : "Failed";
+            return script.ExitCode == 0 ? "Success" : "Failed";
+        }
+
+        private void EmitFromExecutorEndBlock(ScriptExecutionState script, string why)
+        {
+            script.Result = ImeResultFromEndBlock(script);
+            script.ResultSource = "agentexecutor_fallback";
+            var basis = script.Stderr == null ? $"exit code {script.ExitCode}, stderr not read" : script.Stderr.Trim().Length == 0 ? "empty stderr" : "stderr present";
+            EmitPlatformScriptResult(script, $"{why} — {script.Result} from the executor end block ({basis}) (fallback)");
+        }
+
         /// <summary>
         /// Grace period after a platform script's AgentExecutor exit code is observed before
         /// <see cref="FlushPendingPlatformScriptResults"/> emits a completion from that exit code.
@@ -679,29 +855,48 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         /// out once its executor end block has been read — the block arrives within one pass, so
         /// stdout/stderr are in by now — or after <see cref="PlatformScriptEndBlockGrace"/>.</item>
         /// <item>A script with a known AgentExecutor exit code but no IME <c>PS-SCRIPT-RESULT</c>
-        /// line within <see cref="PlatformScriptResultGrace"/> is emitted from the exit code
-        /// (0 → Success, else Failed), tagged <c>resultSource=agentexecutor_fallback</c> so the
-        /// data is honest about its provenance. Without this, scripts that completed shortly
-        /// before the agent terminates were silently dropped.</item>
+        /// line within <see cref="PlatformScriptResultGrace"/> is emitted from its end block by
+        /// IME's own rule (<see cref="ImeResultFromEndBlock"/>), tagged
+        /// <c>resultSource=agentexecutor_fallback</c> so the data is honest about its provenance.
+        /// Without this, scripts that completed shortly before the agent terminates were silently
+        /// dropped.</item>
         /// </list>
+        /// Parked runs go first, oldest first, so a policy's runs leave in run order; one without
+        /// result and end block keeps waiting — across a shutdown too — until a later run's result
+        /// resolves it or it is a day old.
         /// Runs on the single-threaded polling loop (no locking needed, same as the handlers).
         /// <paramref name="force"/> bypasses both grace checks for the final pass on shutdown.
         /// </summary>
         internal void FlushPendingPlatformScriptResults(DateTime nowUtc, bool force = false)
         {
-            if (_pendingPlatformScripts.Count == 0) return;
+            if (_pendingPlatformScripts.Count == 0 && _parkedPlatformScripts.Count == 0) return;
 
             var fallbackEmitted = false;
-            foreach (var script in _pendingPlatformScripts.Values.ToList())
+            foreach (var run in _parkedPlatformScripts.OrderBy(StartOf).ToList())
             {
-                // Already emitted by the authoritative path — just drop the stale buffer entry.
-                if (_platformScriptResultEmitted.ContainsKey(script.PolicyId))
+                if (run.Result != null)
                 {
-                    _pendingPlatformScripts.Remove(script.PolicyId);
-                    _stateDirty = true;
+                    if (run.ExitCode.HasValue || force || !run.ResultHeldSinceUtc.HasValue || nowUtc - run.ResultHeldSinceUtc.Value >= PlatformScriptEndBlockGrace)
+                        EmitPlatformScriptResult(run, run.ExitCode.HasValue ? "executor end block read after the result" : $"no executor end block within {PlatformScriptEndBlockGrace.TotalSeconds:F0}s");
                     continue;
                 }
+                if (run.ExitCode.HasValue)
+                {
+                    if (!force && (!run.ExitObservedAtUtc.HasValue || nowUtc - run.ExitObservedAtUtc.Value < PlatformScriptResultGrace)) continue;
+                    EmitFromExecutorEndBlock(run, $"result not seen within {PlatformScriptResultGrace.TotalSeconds:F0}s{(force ? ", shutdown flush" : string.Empty)}");
+                    fallbackEmitted = true;
+                    continue;
+                }
+                if (run.StartedAtUtc.HasValue && nowUtc - run.StartedAtUtc.Value > StalePlatformRunAge)
+                {
+                    _parkedPlatformScripts.Remove(run);
+                    _stateDirty = true;
+                    _logger.Debug($"ImeLogTracker: platform script {run.PolicyId} run {run.RunId} waited a day without IME result or executor end block — dropped");
+                }
+            }
 
+            foreach (var script in _pendingPlatformScripts.Values.ToList())
+            {
                 if (script.Result != null)
                 {
                     if (script.ExitCode.HasValue)
@@ -720,10 +915,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                     if (nowUtc - script.ExitObservedAtUtc.Value < PlatformScriptResultGrace) continue;
                 }
 
-                script.Result = script.ExitCode.Value == 0 ? "Success" : "Failed";
-                script.ResultSource = "agentexecutor_fallback";
-                EmitPlatformScriptResult(script,
-                    $"result not seen within {PlatformScriptResultGrace.TotalSeconds:F0}s{(force ? ", shutdown flush" : string.Empty)} — emitted from AgentExecutor exit code {script.ExitCode.Value} (fallback)");
+                EmitFromExecutorEndBlock(script, $"result not seen within {PlatformScriptResultGrace.TotalSeconds:F0}s{(force ? ", shutdown flush" : string.Empty)}");
                 fallbackEmitted = true;
             }
 
@@ -735,7 +927,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         /// <summary>Test seam: inject a pending platform script as if AgentExecutor.log had reported
         /// its start + exit code, without an IME PS-SCRIPT-RESULT line.</summary>
         internal void SeedPendingPlatformScriptForTesting(string policyId, int? exitCode, DateTime? exitObservedAtUtc, string stdout = null, DateTime? startedAtUtc = null,
-            CmTraceLineProvenance startedAtProvenance = null, CmTraceLineProvenance exitProvenance = null)
+            CmTraceLineProvenance startedAtProvenance = null, CmTraceLineProvenance exitProvenance = null, string stderr = null)
         {
             // Mirrors a fresh execution start: a new run clears any prior emitted-marker (see
             // HandleScriptStarted) so re-runs of the same policy within one lifetime emit again.
@@ -744,9 +936,11 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
             {
                 PolicyId = policyId,
                 ScriptType = "platform",
+                RunId = NewRunId(),
                 ExitCode = exitCode,
                 ExitObservedAtUtc = exitObservedAtUtc,
                 Stdout = stdout,
+                Stderr = stderr,
                 StartedAtUtc = startedAtUtc,
                 StartedAtProvenance = startedAtProvenance,
                 ExitProvenance = exitProvenance,
@@ -755,6 +949,9 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
             RecordInvocationMarker(policyId, isClose: false);
         }
 
+        /// <summary>Test seam: earlier runs waiting for their IME result while a later run of their policy is in flight.</summary>
+        internal int ParkedPlatformScriptCountForTest => _parkedPlatformScripts.Count;
+
         /// <summary>Test seam: the authoritative IME PS-SCRIPT-RESULT path for a platform script
         /// (the production handler minus regex extraction). <paramref name="resultLineTimestampUtc"/>
         /// stands in for the CMTrace timestamp of the PS-SCRIPT-RESULT line (production reads it
@@ -793,7 +990,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         /// for each detection. When HS-NEW-RESULT later fires with the full payload, the UI
         /// reducer's dataCompleteness scoring keeps the more complete entry.
         /// </summary>
-        private void HandleHealthScriptDetectionResult(Match match, Dictionary<string, string> parameters)
+        private void HandleHealthScriptDetectionResult(Match match)
         {
             var id = match.Groups["id"]?.Value;
             var compliance = match.Groups["compliance"]?.Value;
@@ -915,7 +1112,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                 sample,
                 @"\[HS\] the (?<part>pre|post)-remdiation detection script compliance result for (?<id>[a-z0-9]{8}-[a-z0-9]{4}-[a-z0-9]{4}-[a-z0-9]{4}-[a-z0-9]{12}) is (?<compliance>True|False)",
                 System.Text.RegularExpressions.RegexOptions.IgnoreCase);
-            HandleHealthScriptDetectionResult(match, new Dictionary<string, string>());
+            HandleHealthScriptDetectionResult(match);
         }
 
         /// <summary>Test seam: seed the per-policy health-script cycle start timestamp as if an
@@ -928,7 +1125,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
             _healthScriptStartTimes[policyId] = (startedAtUtc, provenance);
         }
 
-        private void HandleHealthScriptResult(Match match, Dictionary<string, string> parameters)
+        private void HandleHealthScriptResult(Match match)
         {
             var json = match.Groups["json"]?.Value;
             if (string.IsNullOrEmpty(json))
@@ -944,7 +1141,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         /// <summary>
         /// Test seam that bypasses the regex-match plumbing and feeds a raw <c>[HS] new result</c>
         /// JSON payload directly into the parser. Production code path runs through
-        /// <see cref="HandleHealthScriptResult(Match, Dictionary{string, string})"/>; this method
+        /// <see cref="HandleHealthScriptResult(Match)"/>; this method
         /// exists so unit tests can exercise the JSON parser + 1-3 phase emit logic without
         /// having to write CMTrace log files into a temp directory.
         /// </summary>

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Enrollment/Ime/ImeLogTracker.LogProcessing.cs

@@ -123,8 +123,9 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
             var ledger = IsMultiWriterLogFile(fileName) ? GetLedger(fileName) : null;
 
             // Set by a rewind: entries that still read unchanged behind the old bookmark are
-            // skipped (their invocation markers are given back), and nothing below the old
-            // bookmark is fresh or a calibration anchor.
+            // skipped (their invocation markers are given back); a changed entry below the old
+            // bookmark is fresh only when the bytes it replaced were seen moments ago, and never a
+            // calibration anchor.
             RewindState rewind = null;
             long oldBookmark = -1;
             var writerBoundaries = IsWriterBoundaryLogFile(fileName);
@@ -171,12 +172,12 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                     var guardFrom = ledger.OffsetOfEntryAtOrAfter(startPos - OverwriteGuardBytes);
                     if (guardFrom >= 0 && guardFrom < startPos)
                     {
-                        var divergence = await FindOverwriteAsync(stream, ledger, guardFrom, startPos, token);
+                        var divergence = await FindOverwriteAsync(stream, ledger, guardFrom, startPos, passNowUtc, token);
                         _verifiedBytes += startPos - guardFrom;
                         if (divergence >= 0)
                         {
                             // The guard saw only the tail of the ledger; the block may start earlier.
-                            var earliest = await FindOverwriteAsync(stream, ledger, ledger.StartOffset, startPos, token);
+                            var earliest = await FindOverwriteAsync(stream, ledger, ledger.StartOffset, startPos, passNowUtc, token);
                             _verifiedBytes += startPos - ledger.StartOffset;
                             _verifyPasses++;
                             if (earliest >= 0) divergence = earliest;
@@ -271,7 +272,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                         }
                     }
 
-                    if (ledger != null) ledger.Record(entry);
+                    if (ledger != null) ledger.Record(entry, passNowUtc);
                     var unchanged = rewind != null && rewind.IsUnchanged(entry);
                     if (unchanged) RestoreInvocationMarkers(rewind, entry.Offset);
 
@@ -287,7 +288,11 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
 
                     if (unchanged) continue; // unchanged behind the old bookmark — processed before the rewind
 
-                    _currentPassLinesAreFresh = passLinesAreFresh && entry.Offset >= oldBookmark;
+                    // Behind the old bookmark only changed entries arrive here: fresh when the bytes they replaced
+                    // were seen moments ago (RewoundEntryIsFresh), never a calibration anchor.
+                    _currentPassLinesAreFresh = entry.Offset >= oldBookmark
+                        ? passLinesAreFresh
+                        : rewind != null && RewoundEntryIsFresh(passLinesAreFresh, rewind.EntryAtRewindPointReplaced, rewind.OldestReplacedSeenUtc, passNowUtc);
 
                     // --- Normal processing (single-line or completed multiline) ---
                     CmTraceLogEntry parsed;
@@ -877,11 +882,11 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                         break;
 
                     case "healthscriptresult":
-                        HandleHealthScriptResult(match, pattern.Parameters);
+                        HandleHealthScriptResult(match);
                         break;
 
                     case "healthscriptdetectionresult":
-                        HandleHealthScriptDetectionResult(match, pattern.Parameters);
+                        HandleHealthScriptDetectionResult(match);
                         break;
 
                     default:

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Enrollment/Ime/ImeLogTracker.Overwrite.cs

@@ -62,6 +62,11 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
             public long Offset;
             public int Length;
             public ulong Hash;
+            /// <summary>
+            /// When these bytes were last seen as they are (read, seeded or verified unchanged): bytes found different
+            /// at this position later were written after it. Not part of the identity.
+            /// </summary>
+            public DateTime SeenUtc;
 
             // Identity is (offset, hash): a tail first read unterminated and later completed
             // keeps its hash but grows by its terminator.
@@ -100,11 +105,11 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                 return idx < Entries.Count ? Entries[idx].Offset : -1;
             }
 
-            public void Record(AssembledEntry e)
+            public void Record(AssembledEntry e, DateTime seenUtc)
             {
                 var idx = IndexOfFirstAtOrAfter(e.Offset);
                 if (idx < Entries.Count) Entries.RemoveRange(idx, Entries.Count - idx);
-                Entries.Add(new LedgerEntry { Offset = e.Offset, Length = e.Length, Hash = e.Hash });
+                Entries.Add(new LedgerEntry { Offset = e.Offset, Length = e.Length, Hash = e.Hash, SeenUtc = seenUtc });
             }
 
             /// <summary>Drops everything from <paramref name="offset"/> on and returns it — the entries a rewind must not process twice.</summary>
@@ -197,7 +202,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
             {
                 ledger.Seeded = true;
                 if (ledger.Entries.Count == 0 && bookmark > 0)
-                    await SeedLedgerAsync(filePath, ledger, bookmark, token).ConfigureAwait(false);
+                    await SeedLedgerAsync(filePath, ledger, bookmark, nowUtc, token).ConfigureAwait(false);
             }
 
             var due = ledger.VerifyRequested || (InContention(nowUtc) && nowUtc >= ledger.NextCadenceVerifyUtc);
@@ -213,7 +218,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
 
             long divergence;
             using (var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
-                divergence = await FindOverwriteAsync(stream, ledger, from, bookmark, token).ConfigureAwait(false);
+                divergence = await FindOverwriteAsync(stream, ledger, from, bookmark, nowUtc, token).ConfigureAwait(false);
             if (token.IsCancellationRequested) return -1;
 
             ledger.VerifyRequested = false;
@@ -228,8 +233,9 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         /// Re-reads [fromOffset, toOffset) with the read loop's assembler and compares against the
         /// ledger. Returns the offset of the first entry whose bytes changed — a ledger entry not
         /// reproduced, or an entry the ledger never had — or -1 when everything reads as before.
+        /// Every entry found unchanged is stamped seen at <paramref name="nowUtc"/>.
         /// </summary>
-        private async Task<long> FindOverwriteAsync(FileStream stream, FileLedger ledger, long fromOffset, long toOffset, CancellationToken token)
+        private async Task<long> FindOverwriteAsync(FileStream stream, FileLedger ledger, long fromOffset, long toOffset, DateTime nowUtc, CancellationToken token)
         {
             var entries = ledger.Entries;
             var idx = ledger.IndexOfFirstAtOrAfter(fromOffset);
@@ -255,6 +261,9 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                 if (idx < entries.Count && entries[idx].Offset == e.Offset)
                 {
                     if (entries[idx].Hash != e.Hash) return e.Offset;
+                    var confirmed = entries[idx];
+                    confirmed.SeenUtc = nowUtc;
+                    entries[idx] = confirmed;
                     idx++;
                     continue;
                 }
@@ -265,7 +274,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         }
 
         /// <summary>After a restart the ledger is empty: fingerprint the entries just behind the persisted bookmark without processing them.</summary>
-        private async Task SeedLedgerAsync(string filePath, FileLedger ledger, long bookmark, CancellationToken token)
+        private async Task SeedLedgerAsync(string filePath, FileLedger ledger, long bookmark, DateTime nowUtc, CancellationToken token)
         {
             var from = Math.Max(0, bookmark - RestartSeedBytes);
             using (var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
@@ -288,7 +297,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                     if (assembler.Feed(line, reader.LastLineStart, reader.Position, reader.LastLineTruncated, reader.LastLineHash, out e)
                             == CmTraceEntryAssembler.Outcome.Entry
                         && e.Offset + e.Length <= bookmark)
-                        ledger.Record(e);
+                        ledger.Record(e, nowUtc);
                 }
             }
         }
@@ -300,12 +309,17 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         /// </summary>
         private sealed class RewindState
         {
-            public RewindState(string fileName, HashSet<LedgerEntry> unchanged, List<InvocationMarker> markers, InvocationMarker lastPlatformMarker)
+            public RewindState(string fileName, HashSet<LedgerEntry> unchanged, List<InvocationMarker> markers, InvocationMarker lastPlatformMarker, long rewindTo)
             {
                 FileName = fileName;
                 Unchanged = unchanged;
                 Markers = markers;
                 LastPlatformMarker = lastPlatformMarker;
+                foreach (var replaced in unchanged)
+                {
+                    if (replaced.Offset == rewindTo) EntryAtRewindPointReplaced = true;
+                    if (!OldestReplacedSeenUtc.HasValue || replaced.SeenUtc < OldestReplacedSeenUtc.Value) OldestReplacedSeenUtc = replaced.SeenUtc;
+                }
             }
 
             public string FileName { get; }
@@ -315,10 +329,29 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
             /// <summary>The tracker-wide last platform marker, when it was among the set-aside ones.</summary>
             public InvocationMarker LastPlatformMarker { get; }
             public int Next { get; set; }
+            /// <summary>The ledger held the entry at the rewind point: the changed bytes lie where something was seen before.</summary>
+            public bool EntryAtRewindPointReplaced { get; }
+            /// <summary>The earliest time any of the replaced bytes was last seen as it was: every changed byte was written after it.</summary>
+            public DateTime? OldestReplacedSeenUtc { get; }
 
             public bool IsUnchanged(AssembledEntry entry) => Unchanged.Contains(new LedgerEntry { Offset = entry.Offset, Hash = entry.Hash });
         }
 
+        /// <summary>
+        /// Whether an entry a rewind re-processes (it reads differently than before) is fresh. Its bytes were written after
+        /// the bytes it replaced were last seen as they were — IME stamps a line when it writes it — so when that was at
+        /// most <see cref="FreshLineMaxAge"/> ago the entry's age is bounded like an appended line's and it may anchor
+        /// itself (session d29e27e3: recovered result lines fell back to the agent's stale zone and lost their duration).
+        /// Not fresh when the pass is not (the first pass after a restart never anchors), when the divergence lies in bytes
+        /// the ledger never held (nothing dates them), or when the clock stepped back since.
+        /// </summary>
+        internal static bool RewoundEntryIsFresh(bool passLinesAreFresh, bool entryAtRewindPointReplaced, DateTime? oldestReplacedSeenUtc, DateTime passNowUtc)
+        {
+            if (!passLinesAreFresh || !entryAtRewindPointReplaced || !oldestReplacedSeenUtc.HasValue) return false;
+            var sinceSeen = passNowUtc - oldestReplacedSeenUtc.Value;
+            return sinceSeen >= TimeSpan.Zero && sinceSeen <= FreshLineMaxAge;
+        }
+
         /// <summary>Moves the bookmark back to the first changed entry; returns what the re-read needs to skip and to give back.</summary>
         private RewindState ApplyRewind(string filePath, string fileName, FileLedger ledger, long rewindTo, long bookmark)
         {
@@ -341,7 +374,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
             {
                 _logger.Debug(message);
             }
-            return new RewindState(fileName, removed, markers, tookLastPlatformMarker ? lastPlatformMarker : null);
+            return new RewindState(fileName, removed, markers, tookLastPlatformMarker ? lastPlatformMarker : null, rewindTo);
         }
 
         private long RetentionFloor(string fileName, long bookmark)
@@ -380,11 +413,20 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         {
             public long Offset;
             public string PolicyId;
+            /// <summary>
+            /// The platform run the start line belongs to: the lines behind it go to that run while it is pending or
+            /// waits for its IME result, and nowhere once it was emitted — never to a later run of the same policy.
+            /// Null only on seeded test markers, which resolve by policy.
+            /// </summary>
+            public string RunId;
             public bool IsClose;
             /// <summary>Set on a writer boundary: the platform invocation it closed.</summary>
             public string ClosedPolicyId;
         }
 
+        /// <summary>Run id of a start line whose run was emitted already (a late line): owns its lines, matches no live run.</summary>
+        private const string EmittedRunId = "emitted";
+
         private const string ExecutorLogFileName = "AgentExecutor.log";
 
         private readonly Dictionary<string, List<InvocationMarker>> _invocationMarkers =
@@ -437,7 +479,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
             list.Add(marker);
         }
 
-        private void RecordInvocationMarker(string policyId, bool isClose)
+        private void RecordInvocationMarker(string policyId, bool isClose, string runId = null)
         {
             if (_currentEntryOffset < 0) return;
             var file = _currentSourceFileName ?? TestSourceFileName;
@@ -451,6 +493,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                 if (!isClose && policyId != null && last.ClosedPolicyId == null)
                 {
                     last.PolicyId = policyId;
+                    last.RunId = runId;
                     last.IsClose = false;
                     _lastPlatformMarker = last;
                     _platformMarkerFiles.Add(file);
@@ -458,7 +501,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                 return;
             }
 
-            var marker = new InvocationMarker { Offset = _currentEntryOffset, PolicyId = policyId, IsClose = isClose };
+            var marker = new InvocationMarker { Offset = _currentEntryOffset, PolicyId = policyId, RunId = runId, IsClose = isClose };
             AppendInvocationMarker(list, marker);
             if (!isClose && policyId != null)
             {
@@ -526,6 +569,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
             if (marker == null || marker.IsClose || marker.PolicyId == null) return null;
 
             ownerPolicyId = marker.PolicyId;
+            if (marker.RunId != null) return FindLivePlatformRun(marker.PolicyId, marker.RunId);
             ScriptExecutionState state;
             return _pendingPlatformScripts.TryGetValue(marker.PolicyId, out state) ? state : null;
         }

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Enrollment/Ime/ImeLogTracker.cs

@@ -182,6 +182,13 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         private readonly Dictionary<string, ScriptExecutionState> _pendingPlatformScripts =
             new Dictionary<string, ScriptExecutionState>(StringComparer.OrdinalIgnoreCase);
 
+        // Earlier runs of a policy whose next executor run started before IME's result of them was
+        // read (IME re-runs a failed script on later check-ins; the first pass reads all of
+        // AgentExecutor.log before the IME log). Each keeps its own end block until its result
+        // arrives — session eff1b413 lost that and paired the first result with the last run's block.
+        private readonly List<ScriptExecutionState> _parkedPlatformScripts = new List<ScriptExecutionState>();
+        private const int MaxParkedPlatformScripts = 64;
+
         /// <summary>
         /// The platform runs this tracker started and emitted, for the registry reconciliation that
         /// checks them against IME's saved results (D-316). Shared with the registry host's thread.
@@ -1191,6 +1198,16 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                 }
             }
 
+            _parkedPlatformScripts.Clear();
+            if (state.ParkedPlatformScripts != null)
+            {
+                foreach (var parked in state.ParkedPlatformScripts)
+                {
+                    if (!string.IsNullOrEmpty(parked?.PolicyId) && _parkedPlatformScripts.Count < MaxParkedPlatformScripts)
+                        _parkedPlatformScripts.Add(parked);
+                }
+            }
+
             _scriptTimeoutSuspectedPosted.Clear();
             if (state.ScriptTimeoutSuspectedPosted != null)
             {
@@ -1276,6 +1293,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                 // must survive restarts — see the LoadState comment for the duplicate scenario.
                 PlatformScriptResultEmittedAt = new Dictionary<string, DateTime>(_platformScriptResultEmitted, StringComparer.OrdinalIgnoreCase),
                 PendingPlatformScripts = _pendingPlatformScripts.Values.ToList(),
+                ParkedPlatformScripts = _parkedPlatformScripts.ToList(),
                 ScriptTimeoutSuspectedPosted = _scriptTimeoutSuspectedPosted.ToList(),
                 RecurringScripts = _recurringScripts.ToPersisted(),
             };

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Enrollment/Ime/ImeTrackerStatePersistence.cs

@@ -151,6 +151,10 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         // that run from the start of the next one.
         public Dictionary<string, DateTime> PlatformScriptResultEmittedAt { get; set; }
         public List<ScriptExecutionState> PendingPlatformScripts { get; set; }
+        // Earlier runs that wait for their IME result while a later run of the same policy is in
+        // flight; a restart between reading AgentExecutor.log and the IME log must keep them. Null on
+        // older state files → none.
+        public List<ScriptExecutionState> ParkedPlatformScripts { get; set; }
         public List<string> ScriptTimeoutSuspectedPosted { get; set; }
 
         // Recurring health-script runs collapsed per policy. Saved in the same write as

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Enrollment/Ime/PlatformScriptRunRegister.cs

@@ -41,9 +41,12 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
     /// Written on the tracker's poll thread, claimed on the registry host's timer thread: every member
     /// locks, and nothing calls out while holding the lock.
     /// <para>
-    /// A save belongs to the latest run of its key: IME runs a policy once per batch and saves the
-    /// batch after its last script, so the next run of the same key starts minutes later at the
-    /// earliest. A save is paired only after the tracker completed a pass that started
+    /// A save belongs to the latest run of its key: IME runs a policy at most once per check-in and
+    /// saves after reporting that check-in's batch, so the next run of the key comes with a later
+    /// check-in. (Overlapping check-ins can run a key twice at once; then IME itself shares the key's
+    /// result files and the judge's foreign verdict is the safety net.) A run that waited for its IME
+    /// result while a later run of its key already started is emitted without touching that later
+    /// run's entry. A save is paired only after the tracker completed a pass that started
     /// <see cref="TrackerCatchUp"/> after the save was seen — every line written before the save, the
     /// run's start among them, has been read by then, a stalled poll loop included.
     /// </para>

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Enrollment/Ime/ScriptExecutionState.cs

@@ -23,11 +23,20 @@ public class ScriptExecutionState
     public string UserId { get; set; }
 
     /// <summary>
-    /// Identity of one emitted platform-script run, surfaced as <c>runId</c> on the event: what a
-    /// later <c>script_output_reconciliation</c> names when it corrects that run.
+    /// Identity of one platform-script run, given when its slot opens and surfaced as <c>runId</c> on
+    /// the event: the invocation markers bind the run's executor lines to it, and a later
+    /// <c>script_output_reconciliation</c> names it when it corrects that run.
     /// </summary>
     public string RunId { get; set; }
 
+    /// <summary>
+    /// Source timestamp of the run's AgentExecutor start line (<c>Adding argument powershell with
+    /// value …</c>). Every executor process writes that line once, so a later one for the same
+    /// policy starts the next run, never this one. Null until the line is read, and on state files
+    /// from before the field.
+    /// </summary>
+    public System.DateTime? ExecutorStartedAtUtc { get; set; }
+
     /// <summary>
     /// UTC timestamp of the script's first observed start line, taken from the source CMTrace log
     /// timestamp (so it dates correctly even when the agent replays historic IME log content that

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Enrollment/SystemSignals/EspAndHelloTracker.cs

@@ -50,12 +50,12 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
 
         // Session caa6cf50 gate-starvation fix (2026-06-11) — fire-once guard for the
         // user-ESP-apps-settled AccountSetup synthesis (see MaybeSynthesizeAccountSetupComplete).
-        // Interlocked rather than a plain bool: since the sits-d Cloud-PC fix the synthesis is
+        // Interlocked rather than a plain bool: since the Cloud-PC fix the synthesis is
         // ALSO re-evaluated from the IME app-state-change thread, so two threads can reach the
         // guard concurrently (Shell-Core watcher thread + IME log thread).
         private int _userAppsSettledSynthesisFired;
 
-        // sits-d Cloud-PC fix (2026-08-19) — set once a CONFIRMED post-AccountSetup Shell-Core
+        // Cloud-PC fix (2026-08-19) — set once a CONFIRMED post-AccountSetup Shell-Core
         // exit has been observed (live OR backfill). The synthesis needs two facts: the ESP exit
         // is an EDGE that happens once, the settled user-ESP apps are a LEVEL that may only be
         // reached minutes later. Recording the edge lets ReevaluateUserAppsSettledSynthesis
@@ -367,7 +367,14 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
             => _shellCoreTracker?.BackfillRecentHelloWizardStart(lookbackMinutes);
 
         /// <summary>
-        /// sits-d Cloud-PC fix (2026-08-19) — re-check the user-apps-settled AccountSetup
+        /// First run only: the update page's records from before the agent started, as telemetry
+        /// and nothing else — see <see cref="ShellCoreTracker.BackfillUpdatePageTelemetry"/>.
+        /// </summary>
+        public void BackfillUpdatePageTelemetry(int lookbackMinutes)
+            => _shellCoreTracker?.BackfillUpdatePageTelemetry(lookbackMinutes);
+
+        /// <summary>
+        /// Cloud-PC fix (2026-08-19) — re-check the user-apps-settled AccountSetup
         /// synthesis after the ESP exit has already been observed. Wired to the IME tracker's
         /// app-state-change callback in <c>DefaultComponentFactory</c>.
         /// <para>

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Enrollment/SystemSignals/MdmRebootPolicyTracker.cs

@@ -237,7 +237,6 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
             var rebootUri = ExtractRebootUri(ParseEventData(xml), description);
 
             ProcessEvent(
-                eventId: record.Id,
                 recordId: recordId,
                 timeCreatedUtc: record.TimeCreated?.ToUniversalTime(),
                 rebootUri: rebootUri,
@@ -251,7 +250,6 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
         /// — after the debounce quiet-period, at backfill completion, or at <see cref="Stop"/>.
         /// </summary>
         internal void ProcessEvent(
-            int eventId,
             long recordId,
             DateTime? timeCreatedUtc,
             string rebootUri,

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Enrollment/SystemSignals/OobeUpdateTelemetry.cs

@@ -14,10 +14,6 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
     /// </summary>
     internal sealed class OobeUpdatePageRecord
     {
-        public const string PageStarted = "page_started";
-        public const string PageStopped = "page_stopped";
-        public const string EventName = "event_name";
-
         public OobeUpdatePageRecord(string cxhEvent, int windowsEventId, string page = null, string result = null, string name = null, string value = null)
         {
             CxhEvent = cxhEvent;
@@ -28,7 +24,10 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
             Value = value;
         }
 
-        /// <summary><see cref="PageStarted"/>, <see cref="PageStopped"/> or <see cref="EventName"/>.</summary>
+        /// <summary>
+        /// <see cref="OobeUpdateVocabulary.PageStarted"/>, <see cref="OobeUpdateVocabulary.PageStopped"/> or
+        /// <see cref="OobeUpdateVocabulary.EventName"/> (the shared vocabulary the backend and the portal read).
+        /// </summary>
         public string CxhEvent { get; }
         public int WindowsEventId { get; }
 
@@ -54,6 +53,13 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
     internal sealed class OobeUpdateTelemetry
     {
         internal const int MaxPageEventsPerRun = 150;
+
+        /// <summary>
+        /// Event names the backfills (first run, restart) report per run — their own budget, so
+        /// the records from before the agent started cannot spend the live page's.
+        /// </summary>
+        internal const int MaxBackfillPageEventsPerRun = 150;
+
         internal const int MaxPageEventsPerKey = 3;
         internal const int MaxStateEventsPerRun = 6;
         internal const int MaxStateLineLength = 1000;
@@ -67,7 +73,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
             public const string AgentStop = "agent_stop";
         }
 
-        private const string Source = "ShellCoreTracker";
+        private const string Source = Constants.EventSources.ShellCoreTracker;
 
         private readonly string _sessionId;
         private readonly string _tenantId;
@@ -77,8 +83,10 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
 
         private readonly object _lock = new object();
         private readonly Dictionary<string, int> _pageEventsPerKey = new Dictionary<string, int>(StringComparer.Ordinal);
-        private int _pageEvents;
-        private bool _pageCapLogged;
+        private int _livePageEvents;
+        private int _backfillPageEvents;
+        private bool _liveCapReported;
+        private bool _backfillCapReported;
         private int _stateEvents;
         private string _lastStateContent;
 
@@ -99,33 +107,49 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
         /// <summary>
         /// One <c>oobe_update_page</c> per update-page record, at most
         /// <see cref="MaxPageEventsPerKey"/> per page/name — a page that logs the same name in a
-        /// loop cannot flood the session. Event names also share <see cref="MaxPageEventsPerRun"/>
-        /// per run; a page start or stop is outside that budget, because the time attribution
-        /// reads the update's span from them. True when the record was reported.
+        /// loop cannot flood the session. Event names also share a budget per run: live ones
+        /// <see cref="MaxPageEventsPerRun"/>, backfilled ones <see cref="MaxBackfillPageEventsPerRun"/>;
+        /// the first name over a budget sends the <see cref="OobeUpdateVocabulary.NamesCapped"/>
+        /// marker. A page start or stop is outside the budgets, because the time attribution reads
+        /// the update's span from them. True when the record was reported.
         /// </summary>
         public bool ReportPage(OobeUpdatePageRecord record, DateTime occurredAtUtc, bool isBackfill)
         {
             if (record == null) return false;
 
-            var isEventName = record.CxhEvent == OobeUpdatePageRecord.EventName;
+            var isEventName = record.CxhEvent == OobeUpdateVocabulary.EventName;
             var key = $"{record.CxhEvent}:{record.Page ?? record.Name}";
-            int occurrence;
+            var budget = isBackfill ? MaxBackfillPageEventsPerRun : MaxPageEventsPerRun;
+            var occurrence = 0;
+            bool overBudget;
+            var firstOverBudget = false;
             lock (_lock)
             {
-                if (isEventName && _pageEvents >= MaxPageEventsPerRun)
+                overBudget = isEventName && (isBackfill ? _backfillPageEvents : _livePageEvents) >= budget;
+                if (overBudget)
                 {
-                    if (!_pageCapLogged)
-                    {
-                        _pageCapLogged = true;
-                        _logger.Info($"OOBE update page telemetry: {MaxPageEventsPerRun} event names reached, the rest of this run stays in agent.log");
-                    }
-                    return false;
+                    firstOverBudget = isBackfill ? !_backfillCapReported : !_liveCapReported;
+                    if (isBackfill) _backfillCapReported = true;
+                    else _liveCapReported = true;
                 }
-                _pageEventsPerKey.TryGetValue(key, out occurrence);
-                if (occurrence >= MaxPageEventsPerKey) return false;
-                occurrence++;
-                _pageEventsPerKey[key] = occurrence;
-                if (isEventName) _pageEvents++;
+                else
+                {
+                    _pageEventsPerKey.TryGetValue(key, out occurrence);
+                    if (occurrence >= MaxPageEventsPerKey) return false;
+                    occurrence++;
+                    _pageEventsPerKey[key] = occurrence;
+                    if (isEventName)
+                    {
+                        if (isBackfill) _backfillPageEvents++;
+                        else _livePageEvents++;
+                    }
+                }
+            }
+
+            if (overBudget)
+            {
+                if (firstOverBudget) ReportNamesCapped(budget, occurredAtUtc, isBackfill);
+                return false;
             }
 
             var data = new Dictionary<string, object>
@@ -141,6 +165,32 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
             if (record.Name != null) data["name"] = record.Name;
             if (record.Value != null) data["value"] = record.Value;
 
+            return EmitPage(occurredAtUtc, DescribePage(record), data);
+        }
+
+        /// <summary>
+        /// The marker that a budget is spent: from here on this run's live or backfilled event
+        /// names stay in agent.log, so a name missing from the session proves nothing — the
+        /// analyze rules that read an absent name check for this marker first.
+        /// </summary>
+        private void ReportNamesCapped(int budget, DateTime occurredAtUtc, bool isBackfill)
+        {
+            var kind = isBackfill ? "backfilled " : string.Empty;
+            _logger.Info($"OOBE update page telemetry: {budget} {kind}event names reached, the rest of this run stays in agent.log");
+
+            EmitPage(occurredAtUtc,
+                $"OOBE update page: {budget} {kind}event names reached, later ones of this agent run are not sent",
+                new Dictionary<string, object>
+                {
+                    { "cxhEvent", OobeUpdateVocabulary.NamesCapped },
+                    { "eventTime", occurredAtUtc.ToString("o") },
+                    { "backfill", isBackfill },
+                    { "limit", budget },
+                });
+        }
+
+        private bool EmitPage(DateTime occurredAtUtc, string message, Dictionary<string, object> data)
+        {
             try
             {
                 _post.Emit(new EnrollmentEvent
@@ -152,7 +202,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
                     Severity = EventSeverity.Debug,
                     Source = Source,
                     Phase = EnrollmentPhase.Unknown,
-                    Message = DescribePage(record),
+                    Message = message,
                     Data = data,
                     ImmediateUpload = false,
                 });
@@ -236,9 +286,9 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
         {
             switch (record.CxhEvent)
             {
-                case OobeUpdatePageRecord.PageStarted:
+                case OobeUpdateVocabulary.PageStarted:
                     return $"OOBE update page started: {record.Page}";
-                case OobeUpdatePageRecord.PageStopped:
+                case OobeUpdateVocabulary.PageStopped:
                     return $"OOBE update page stopped: {record.Page} (result: {record.Result})";
                 default:
                     return record.Value == null

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Enrollment/SystemSignals/ProvisioningStatusTracker.cs

@@ -1382,7 +1382,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
                     // window (user clicks "Try again" / IME re-sync flips the subcategory back
                     // to inProgress) — firing the stale args would terminate the agent on a
                     // failure Windows no longer reports, and the retry outcome is lost.
-                    recovered = IsSettledFailureRecovered(categoryName, args);
+                    recovered = IsSettledFailureRecovered(categoryName);
                     if (recovered)
                     {
                         if (args.FailedSubcategory != null
@@ -1447,7 +1447,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
         /// and must fire (with the latched args — statusText/HRESULT of the new subcategory
         /// were never captured). Caller holds <see cref="_stateLock"/>.
         /// </summary>
-        private bool IsSettledFailureRecovered(string categoryName, EspFailureDetectedEventArgs args)
+        private bool IsSettledFailureRecovered(string categoryName)
         {
             if (_lastCategorySucceeded != null
                 && _lastCategorySucceeded.TryGetValue(categoryName, out var succeeded)