chore(deps): bump the mcp group (#183)

Bumps the mcp group in /src/McpServer/autopilot-monitor-mcp with 6 updates:

| Package | From | To |
| --- | --- | --- |
| [@modelcontextprotocol/node](https://github.com/modelcontextprotocol/typescript-sdk) | `2.1.0` | `2.1.1` |
| [@modelcontextprotocol/server](https://github.com/modelcontextprotocol/typescript-sdk) | `2.2.0` | `2.3.0` |
| [@modelcontextprotocol/client](https://github.com/modelcontextprotocol/typescript-sdk) | `2.2.0` | `2.3.0` |
| [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) | `22.20.4` | `22.20.5` |
| [knip](https://github.com/webpro-nl/knip/tree/HEAD/packages/knip) | `6.37.0` | `6.39.0` |
| [typescript-eslint](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/typescript-eslint) | `8.65.0` | `8.71.0` |


Updates `@modelcontextprotocol/node` from 2.1.0 to 2.1.1
- [Release notes](https://github.com/modelcontextprotocol/typescript-sdk/releases)
- [Commits](https://github.com/modelcontextprotocol/typescript-sdk/compare/@modelcontextprotocol/node@2.1.0...@modelcontextprotocol/node@2.1.1)

Updates `@modelcontextprotocol/server` from 2.2.0 to 2.3.0
- [Release notes](https://github.com/modelcontextprotocol/typescript-sdk/releases)
- [Commits](https://github.com/modelcontextprotocol/typescript-sdk/compare/@modelcontextprotocol/server@2.2.0...@modelcontextprotocol/server@2.3.0)

Updates `@modelcontextprotocol/client` from 2.2.0 to 2.3.0
- [Release notes](https://github.com/modelcontextprotocol/typescript-sdk/releases)
- [Commits](https://github.com/modelcontextprotocol/typescript-sdk/compare/@modelcontextprotocol/client@2.2.0...@modelcontextprotocol/client@2.3.0)

Updates `@types/node` from 22.20.4 to 22.20.5
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

Updates `knip` from 6.37.0 to 6.39.0
- [Release notes](https://github.com/webpro-nl/knip/releases)
- [Commits](https://github.com/webpro-nl/knip/commits/knip@6.39.0/packages/knip)

Updates `typescript-eslint` from 8.65.0 to 8.71.0
- [Release notes](https://github.com/typescript-eslint/typescript-eslint/releases)
- [Changelog](https://github.com/typescript-eslint/typescript-eslint/blob/main/packages/typescript-eslint/CHANGELOG.md)
- [Commits](https://github.com/typescript-eslint/typescript-eslint/commits/v8.71.0/packages/typescript-eslint)

---
updated-dependencies:
- dependency-name: "@modelcontextprotocol/node"
  dependency-version: 2.1.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: mcp
- dependency-name: "@modelcontextprotocol/server"
  dependency-version: 2.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: mcp
- dependency-name: "@modelcontextprotocol/client"
  dependency-version: 2.3.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: mcp
- dependency-name: "@types/node"
  dependency-version: 22.20.5
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: mcp
- dependency-name: knip
  dependency-version: 6.39.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: mcp
- dependency-name: typescript-eslint
  dependency-version: 8.71.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: mcp
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.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/Get-StorageAuthHeaders.ps1

@@ -11,6 +11,7 @@
     Identity comes from whatever `az login` established: the federated GitHub OIDC principal
     in CI (azure/login, subject repo:okieselbach/AutopilotMonitor:ref:refs/heads/main), the
     operator's own account for the local build. No secret is read, stored or passed around.
+    Under GitHub Actions the token is masked in the run log before it is returned.
 
     x-ms-version is MANDATORY here, not decoration: Entra-authorized requests are rejected
     below 2017-11-09, and Table requests without a SAS must carry the header at all. 2021-08-06
@@ -45,6 +46,15 @@ if ($LASTEXITCODE -ne 0 -or [string]::IsNullOrWhiteSpace($token)) {
            'on the table -- a missing role shows up later as HTTP 403 AuthorizationPermissionMismatch.')
 }
 
+# GitHub masks only secrets.* on its own; a token minted at run time is clear text in the
+# (public) run log the moment anything prints it -- an uncaptured call of this script, or
+# Get-Error / Format-List on a failed request, whose TargetObject carries this header.
+# Write-Host, never Write-Output: the output stream is this script's return value. Only
+# under Actions -- anywhere else the line would print the token instead of hiding it.
+if ($env:GITHUB_ACTIONS -eq 'true') {
+    Write-Host "::add-mask::$token"
+}
+
 return @{
     'Authorization' = "Bearer $token"
     'x-ms-version'  = '2021-08-06'

.github/workflows/action-pins.yml

@@ -26,7 +26,10 @@ 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:
@@ -45,7 +48,7 @@ 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 +62,15 @@ 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 +94,7 @@ 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
 

.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

@@ -72,7 +72,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
 
@@ -124,7 +124,7 @@ jobs:
 
       # SDK 10 = single build toolchain (parity with local build.ps1 / global.json).
       - name: Setup .NET
-        uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6
+        uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6.0.0
         with:
           dotnet-version: '10.0.x'
 
@@ -464,7 +464,7 @@ 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 +472,13 @@ 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 }}
           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 }}

.github/workflows/build-msi.yml

@@ -40,7 +40,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
 
@@ -240,12 +240,12 @@ jobs:
       # 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
@@ -98,11 +98,11 @@ 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 +124,9 @@ 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 +134,11 @@ 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 +160,12 @@ 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 +176,11 @@ 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 +188,19 @@ 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 +208,7 @@ 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 +222,11 @@ 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 +245,11 @@ 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 +263,33 @@ 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

@@ -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

@@ -24,49 +24,26 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
-      - 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
+      # can rewrite the repository. 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 ajv-cli from the lockfile
+      - 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
@@ -83,7 +60,7 @@ jobs:
           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

@@ -19,7 +19,7 @@ jobs:
     name: Build and Deploy Backend
 
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
 
@@ -31,7 +31,7 @@ jobs:
           subscription-id: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
 
       - name: Setup .NET 10
-        uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6
+        uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6.0.0
         with:
           dotnet-version: '10.0.x'
 
@@ -67,7 +67,7 @@ jobs:
         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 }}
 
       - 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

.github/workflows/deploy-mcp.yml

@@ -26,7 +26,7 @@ jobs:
     name: Build and Deploy MCP Server
 
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
 
@@ -38,7 +38,7 @@ 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

.github/workflows/deploy-web.yml

@@ -35,7 +35,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Build and Deploy Job
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
           lfs: false
@@ -57,7 +57,7 @@ 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 +68,7 @@ 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
@@ -108,6 +108,8 @@ jobs:
           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);
@@ -121,6 +123,9 @@ jobs:
           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; }
+          # Fail-soft like the star count: browsers still load the stats live; only crawlers and
+          # LLM fetchers, which run no JS, see no numbers until the next deploy.
+          grep -q 'data-stats-snapshot=' out/index.html || echo "::warning::Platform stats were not baked into the landing page (reason in the build log) - crawlers and LLM fetchers see no numbers until the next deploy"
 
       # One archive of the exact bytes that get uploaded, so the attestation has a single subject.
       - name: Package export
@@ -135,12 +140,12 @@ jobs:
       # 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
+        uses: actions/attest-build-provenance@4d101475d8b20a2381f78447822ac1eab6504dd8 # v4.2.2
         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 }}

.github/workflows/publish-scripts.yml

@@ -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
 
@@ -135,7 +135,7 @@ 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/RemoteConfigServiceRetryTests.cs

@@ -144,7 +144,7 @@ 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()

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/ImeLogTrackerHealthTests.cs

@@ -140,6 +140,22 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.Ime
             Assert.Equal(1, fired); // the persisted flag suppressed the second emission
         }
 
+        [Fact]
+        public void Registry_reconciliation_counters_survive_a_restart()
+        {
+            using var h = new Harness();
+            h.Tracker.ScriptRuns.CountVerified();
+            h.Tracker.ScriptRuns.CountVerified();
+            h.Tracker.ScriptRuns.CountCorrected();
+            h.Tracker.SaveStateForTest();
+
+            h.Restart();
+
+            var health = h.Tracker.GetHealthSnapshot();
+            Assert.Equal(2, health.PlatformOutputVerified);
+            Assert.Equal(1, health.PlatformOutputCorrected);
+        }
+
         [Fact]
         public async Task Handler_time_does_not_count_against_the_line_budget()
         {

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.WriterBoundary.cs

@@ -0,0 +1,368 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime;
+using Xunit;
+
+namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.Ime
+{
+    /// <summary>
+    /// Session 756970cf: IME launched a Win32 detection executor and a platform-script executor 15 ms apart, and both
+    /// opened AgentExecutor.log at the same end-of-file offset. The platform executor's shorter start block overwrote
+    /// the detection executor's, whose identity line the tracker never saw; the detection's end block (exit 1 and its
+    /// stdout), written at its own position behind its own start block, then sat behind the PLATFORM start block, and
+    /// "the nearest preceding marker owns the line" handed another script's output and exit code to the platform
+    /// script. These tests pin the writer boundary: an entry that is not exactly one CMTrace record is where one
+    /// writer's bytes end and another's begin, and nothing behind it belongs to the invocation in front of it.
+    /// </summary>
+    public sealed partial class ImeLogTrackerOverwriteRewindTests
+    {
+        private const string RaceUserId = "00000000-0000-0000-0000-000000000000";
+        private const string RacePlatformId = "1d6f0a52-3c4e-4b7a-9e21-5f8c7d2b9a10";
+        private const string RaceDetectionAppId = "8b2e4c71-6a9d-4f03-b5e8-2c7a1d9f4e36";
+        private const string RaceFillerAppId = "5e1c2b7d-0a4f-4c8e-9d36-7b2f1e8a4c50";
+        private const string ImeDir = @"C:\Program Files (x86)\Microsoft Intune Management Extension";
+        private const string DetectionStdout = "VERBOSE: === Sample Suite Detection Started ===\r\nWARNING: === DETECTION FAILED: Sample Suite is not installed ===";
+        private const string PlatformStdout = "=== bootstrap loader started ===\r\nInstaller finished (exit code 0).";
+
+        private static string EntryAt(string time, string message)
+            => $"<![LOG[{message}]LOG]!><time=\"{time}\" date=\"9-10-2026\" component=\"AgentExecutor\" context=\"\" type=\"1\" thread=\"1\" file=\"\">\r\n";
+
+        /// <summary>The four lines every AgentExecutor invocation starts with — identical length for every executor.</summary>
+        private static string ExecutorBanner(string time)
+            => EntryAt(time, "ExecutorLog AgentExecutor gets invoked")
+            + EntryAt(time, "Creating command line parser, name delimiter is - and value separator is  .")
+            + EntryAt(time, "Getting Ordered Parameters")
+            + EntryAt(time, "Parsing Ordered Parameters.");
+
+        private static string ExecutorLaunch(string time, string scriptPath, string pid)
+            => EntryAt(time, "Prepare to run Powershell Script ..")
+            + EntryAt(time, $"cmd line for running powershell is -NoProfile -executionPolicy bypass -file  \"{scriptPath}\" ")
+            + EntryAt(time, "runAs32BitOn64 = False, so Disable Wow64FsRedirection")
+            + EntryAt(time, @"PowerShell path is C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe")
+            + EntryAt(time, $"[Executor] created powershell with process id {pid}");
+
+        private static string PlatformStartBlock(string time, string policyId, string pid)
+        {
+            var path = $@"{ImeDir}\Policies\Scripts\{RaceUserId}_{policyId}.ps1";
+            var results = $@"{ImeDir}\Policies\Results\{RaceUserId}_{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);
+        }
+
+        private static string DetectionStartBlock(string time, string appId, string pid)
+        {
+            var path = $@"{ImeDir}\Content\DetectionScripts\{appId}_2.ps1";
+            return ExecutorBanner(time)
+                + EntryAt(time, $"Adding argument powershellDetection with value {path} to the named argument list.")
+                + EntryAt(time, "PowershellDetection option gets invoked")
+                + EntryAt(time, path)
+                + EntryAt(time, path + "quotedResultFilePath.txt")
+                + EntryAt(time, path + "quotedErrorFilePath.txt")
+                + EntryAt(time, path + "quotedTimeoutFilePath.txt")
+                + EntryAt(time, path + "quotedExitCodeFilePath.txt")
+                + ExecutorLaunch(time, path, pid);
+        }
+
+        private static string ExecutorEndBlock(string time, int exitCode, string stdout)
+            => EntryAt(time, $"Powershell exit code is {exitCode}")
+            + EntryAt(time, $"length of out={stdout.Length}")
+            + EntryAt(time, "length of error=0")
+            + EntryAt(time, "error from script =")
+            + EntryAt(time, exitCode == 0 ? "Powershell script is successfully executed." : "Powershell script is failed to execute")
+            + EntryAt(time, $"write output done. output = {stdout}, error = ")
+            + EntryAt(time, "Revert Wow64FsRedirection")
+            + EntryAt(time, "Agent executor completed.");
+
+        private static string PlatformResultLine(string policyId)
+            => $"[PowerShell] User Id = {RaceUserId}, Policy id = {policyId}, policy result = Success";
+
+        /// <summary>The file offsets at which the entries of an ASCII <paramref name="block"/> start when it is written at <paramref name="at"/>.</summary>
+        private static HashSet<long> EntryStarts(string block, long at)
+        {
+            Assert.True(block.All(c => c < 128), "offset arithmetic assumes ASCII test content");
+            var starts = new HashSet<long>();
+            for (var i = block.IndexOf("<![LOG[", StringComparison.Ordinal); i >= 0; i = block.IndexOf("<![LOG[", i + 1, StringComparison.Ordinal))
+                starts.Add(at + i);
+            return starts;
+        }
+
+        [Fact]
+        public async Task Executor_that_opened_at_the_same_offset_never_lends_its_end_block_to_the_platform_script()
+        {
+            using var h = new Harness("AgentExecutor.log", ScriptPatterns());
+
+            // An earlier, finished detection run: the race starts mid-file like in the field log.
+            h.Append(DetectionStartBlock("12:00:00.0000000", RaceFillerAppId, "1548") + ExecutorEndBlock("12:00:00.5000000", 0, "detected"));
+            await h.Pass();
+            var x = h.Length;
+
+            // Detection executor C and platform executor D open the file at the same end x. C writes first; the tracker
+            // reads C's banner, then D writes its own start block over C's.
+            var cStart = DetectionStartBlock("12:00:01.0000000", RaceDetectionAppId, "6416");
+            var dStart = PlatformStartBlock("12:00:01.2000000", RacePlatformId, "2524");
+            var cHead = cStart.Substring(0, cStart.IndexOf("<![LOG[Getting Ordered Parameters", StringComparison.Ordinal));
+            h.Append(cHead);
+            h.Now = h.Now.AddMilliseconds(100);
+            await h.Pass();
+            h.Append(cStart.Substring(cHead.Length));
+            h.Overwrite(x, dStart);
+
+            // The field geometry: D's start block is shorter and ends inside one of C's lines, so the tail of that line
+            // sits between D's start block and C's remaining bytes.
+            Assert.True(dStart.Length < cStart.Length);
+            Assert.DoesNotContain(x + dStart.Length, EntryStarts(cStart, x));
+            h.Now = h.Now.AddMilliseconds(150);
+            await h.Pass();
+            Assert.True(h.Health.OverwriteRewinds >= 1);
+
+            // C ends: its end block lands at its own position, right behind its own (overwritten) start block.
+            Assert.Equal(x + cStart.Length, h.Length);
+            var cEnd = ExecutorEndBlock("12:00:07.0000000", 1, DetectionStdout);
+            h.Append(cEnd);
+            h.Now = h.Now.AddSeconds(6);
+            await h.Pass();
+
+            // IME's result for D reaches the tracker before D's own end block: the completion must wait for it.
+            h.Tracker.ProcessLogMessageForTest(PlatformResultLine(RacePlatformId), sourceFileName: "IntuneManagementExtension.log");
+            Assert.Empty(h.Completed);
+
+            // D ends: its end block lands at ITS position, over the fragment and C's bytes; C's last line survives.
+            var dEnd = ExecutorEndBlock("12:00:09.5000000", 0, PlatformStdout);
+            Assert.True(dEnd.Length < cStart.Length - dStart.Length + cEnd.Length);
+            h.Overwrite(x + dStart.Length, dEnd);
+            h.Now = h.Now.AddMilliseconds(130);
+            await h.Pass();
+            h.Tracker.FlushPendingPlatformScriptResults(h.Now);
+
+            var script = Assert.Single(h.Completed);
+            Assert.Equal(RacePlatformId, script.PolicyId);
+            Assert.Equal("Success", script.Result);
+            Assert.Equal(0, script.ExitCode);
+            Assert.Equal(PlatformStdout.Replace("\r\n", "\n"), script.Stdout);
+            Assert.DoesNotContain(h.Completed, s => (s.Stdout ?? string.Empty).Contains("Detection"));
+
+            // The run is known to the registry reconciliation under the user id of its own lines (D-316).
+            Assert.Equal(RaceUserId, script.UserId);
+            Assert.False(string.IsNullOrEmpty(script.RunId));
+            h.Tracker.ScriptRuns.NotePassCompleted(DateTime.MaxValue.AddDays(-1));
+            Assert.Equal(PlatformRunClaim.Claimed, h.Tracker.ScriptRuns.TryClaim(RaceUserId, RacePlatformId, h.Now, out var run));
+            Assert.Equal(script.RunId, run!.RunId);
+        }
+
+        /// <summary>
+        /// The mirror image: a foreign executor whose stream position lies inside the platform start block (it opened
+        /// at the same end with a shorter start block) writes its end block there. Its first line merges with the head of
+        /// a platform line — cut inside the message or inside the trailer, which the parser would otherwise read up to
+        /// the foreign trailer — and its output line follows without any marker in between.
+        /// </summary>
+        [Theory]
+        [InlineData(15)]
+        [InlineData(-30)]
+        public async Task Foreign_end_block_merged_into_the_platform_start_block_never_reaches_the_platform_script(int cut)
+        {
+            using var h = new Harness("AgentExecutor.log", ScriptPatterns());
+            h.Append(DetectionStartBlock("12:00:00.0000000", RaceFillerAppId, "1548") + ExecutorEndBlock("12:00:00.5000000", 0, "detected"));
+            await h.Pass();
+            var x = h.Length;
+
+            var dStart = PlatformStartBlock("12:00:01.0000000", RacePlatformId, "2524");
+            h.Append(dStart);
+            await h.Pass();
+
+            // The foreign end block starts inside the line after D's argument line.
+            var lineAfterArgument = x + dStart.IndexOf("<![LOG[Powershell option gets invoked", StringComparison.Ordinal);
+            var lineLength = EntryAt("12:00:01.0000000", "Powershell option gets invoked").Length;
+            var at = lineAfterArgument + (cut > 0 ? cut : lineLength + cut);
+            var foreignEnd = ExecutorEndBlock("12:00:03.0000000", 1, "foreign output");
+            Assert.True(at + foreignEnd.Length < x + dStart.Length, "the foreign block must end inside D's start block");
+            h.Overwrite(at, foreignEnd);
+            h.Tracker.RequestOverwriteCheckForTest();
+            h.Now = h.Now.AddMilliseconds(100);
+            await h.Pass();
+
+            h.Tracker.ProcessLogMessageForTest(PlatformResultLine(RacePlatformId), sourceFileName: "IntuneManagementExtension.log");
+            h.Now = h.Now.Add(ImeLogTracker.PlatformScriptEndBlockGrace);
+            h.Tracker.FlushPendingPlatformScriptResults(h.Now);
+
+            // No owner is provable behind the cut: the completion goes out without end-block data, never with the foreign one.
+            var script = Assert.Single(h.Completed);
+            Assert.Equal("Success", script.Result);
+            Assert.Null(script.ExitCode);
+            Assert.Null(script.Stdout);
+        }
+
+        [Fact]
+        public async Task Entry_read_unchanged_after_a_rewind_keeps_its_platform_marker()
+        {
+            const string platformId = "2b7d9e41-8c3a-4f60-a5d2-9e1b7c4f3a08";
+            using var h = new Harness("AgentExecutor.log", ScriptPatterns());
+
+            // Detection W waits for its script; detection X runs completely behind it; platform F starts behind X.
+            var wStart = DetectionStartBlock("12:00:00.0000000", RaceFillerAppId, "1111");
+            var xRun = DetectionStartBlock("12:00:00.2000000", RaceDetectionAppId, "2222") + ExecutorEndBlock("12:00:00.4000000", 0, "x detected");
+            h.Append(wStart + xRun + PlatformStartBlock("12:00:01.0000000", platformId, "3333"));
+            await h.Pass();
+
+            // W ends at its own position, over the head of X's run; F's start block keeps its bytes and offset.
+            var wEnd = ExecutorEndBlock("12:00:02.0000000", 0, "w detected");
+            Assert.True(wEnd.Length < xRun.Length);
+            h.Overwrite(wStart.Length, wEnd);
+            h.Tracker.RequestOverwriteCheckForTest();
+            h.Now = h.Now.AddMilliseconds(100);
+            await h.Pass();
+            Assert.Equal(1, h.Health.OverwriteRewinds);
+
+            // F's end block lands behind its start block: still F's, because F's marker survived with its bytes.
+            h.Append(ExecutorEndBlock("12:00:05.0000000", 7, "Hello from F"));
+            h.Now = h.Now.AddMilliseconds(100);
+            await h.Pass();
+            h.Tracker.ProcessLogMessageForTest(PlatformResultLine(platformId), sourceFileName: "IntuneManagementExtension.log");
+
+            var script = Assert.Single(h.Completed);
+            Assert.Equal(platformId, script.PolicyId);
+            Assert.Equal(7, script.ExitCode);
+            Assert.Equal("Hello from F", script.Stdout);
+        }
+
+        [Fact]
+        public async Task Writer_boundary_read_unchanged_after_a_rewind_still_closes_the_platform_invocation()
+        {
+            using var h = new Harness("AgentExecutor.log", ScriptPatterns());
+
+            // Detection Q waits for its script while detection R runs completely behind it.
+            var qStart = DetectionStartBlock("12:00:00.0000000", RaceFillerAppId, "1111");
+            var rRun = DetectionStartBlock("12:00:00.2000000", "6c3f8a20-1d5e-4b97-8f4a-0e2d6b9c7a13", "2222") + ExecutorEndBlock("12:00:00.4000000", 0, "r detected");
+            h.Append(qStart + rRun);
+            await h.Pass();
+            var x = h.Length;
+
+            // The race of the field case behind them: the boundary closes D.
+            var cStart = DetectionStartBlock("12:00:01.0000000", RaceDetectionAppId, "6416");
+            var dStart = PlatformStartBlock("12:00:01.2000000", RacePlatformId, "2524");
+            h.Append(cStart);
+            h.Overwrite(x, dStart);
+            h.Now = h.Now.AddMilliseconds(100);
+            await h.Pass();
+
+            // Q ends at its own position, over R's run: the rewind starts in front of the race, whose bytes read unchanged.
+            var qEnd = ExecutorEndBlock("12:00:02.0000000", 0, "q detected");
+            Assert.True(qEnd.Length < rRun.Length);
+            h.Overwrite(qStart.Length, qEnd);
+            h.Tracker.RequestOverwriteCheckForTest();
+            h.Now = h.Now.AddMilliseconds(100);
+            await h.Pass();
+
+            // C's end block behind the boundary stays unowned; D's own end block completes D.
+            var cEnd = ExecutorEndBlock("12:00:07.0000000", 1, DetectionStdout);
+            h.Append(cEnd);
+            h.Now = h.Now.AddMilliseconds(100);
+            await h.Pass();
+            h.Tracker.ProcessLogMessageForTest(PlatformResultLine(RacePlatformId), sourceFileName: "IntuneManagementExtension.log");
+            Assert.Empty(h.Completed);
+
+            h.Overwrite(x + dStart.Length, ExecutorEndBlock("12:00:09.5000000", 0, PlatformStdout));
+            h.Now = h.Now.AddMilliseconds(130);
+            await h.Pass();
+            h.Tracker.FlushPendingPlatformScriptResults(h.Now);
+
+            var script = Assert.Single(h.Completed);
+            Assert.Equal(0, script.ExitCode);
+            Assert.Equal(PlatformStdout.Replace("\r\n", "\n"), script.Stdout);
+        }
+
+        [Fact]
+        public async Task Raw_text_in_the_executor_log_is_never_matched_and_closes_the_platform_invocation()
+        {
+            using var h = new Harness("AgentExecutor.log", ScriptPatterns());
+            h.Append(PlatformStartBlock("12:00:00.0000000", RacePlatformId, "2524"));
+            await h.Pass();
+
+            // The tail of a cut line that happens to read like an exit line, then a foreign end block.
+            h.Append("Powershell exit code is 5\r\n" + ExecutorEndBlock("12:00:02.0000000", 6, "foreign output"));
+            // A fragment right at the bookmark stops the first pass for a check; the second one reads it.
+            h.Now = h.Now.AddMilliseconds(100);
+            await h.Pass();
+            h.Now = h.Now.AddMilliseconds(100);
+            await h.Pass();
+
+            h.Tracker.ProcessLogMessageForTest(PlatformResultLine(RacePlatformId), sourceFileName: "IntuneManagementExtension.log");
+            h.Now = h.Now.Add(ImeLogTracker.PlatformScriptEndBlockGrace);
+            h.Tracker.FlushPendingPlatformScriptResults(h.Now);
+
+            var script = Assert.Single(h.Completed);
+            Assert.Null(script.ExitCode);
+            Assert.Null(script.Stdout);
+        }
+
+        [Fact]
+        public async Task Fragment_in_the_ime_log_does_not_close_the_platform_run_context()
+        {
+            using var h = new Harness("IntuneManagementExtension.log", ScriptPatterns());
+            // In the IME log the service writes the platform marker and the context line itself; the fragment in
+            // between is the tail of an executor's telemetry line and separates nothing.
+            h.Append(Entry(@"Script file C:\Program Files (x86)\Microsoft Intune Management Extension\Policies\Scripts\" + RaceUserId + "_" + RacePlatformId + ".ps1 is generated.", "17")
+                + "ing mananger...]LOG]!><time=\"12:00:00.0000000\" date=\"9-10-2026\" component=\"AgentExecutor\" context=\"\" type=\"1\" thread=\"1\" file=\"\">\r\n"
+                + Entry("Launch powershell executor in user session", "17"));
+            await h.Pass();
+
+            h.Tracker.ProcessLogMessageForTest(PlatformResultLine(RacePlatformId));
+            h.Now = h.Now.Add(ImeLogTracker.PlatformScriptEndBlockGrace);
+            h.Tracker.FlushPendingPlatformScriptResults(h.Now);
+
+            var script = Assert.Single(h.Completed);
+            Assert.Equal("User", script.RunContext);
+        }
+
+        [Fact]
+        public async Task Cut_multi_line_output_adds_one_boundary_not_one_per_line()
+        {
+            using var h = new Harness("AgentExecutor.log", ScriptPatterns());
+            h.Append(PlatformStartBlock("12:00:00.0000000", RacePlatformId, "2524"));
+            await h.Pass();
+            var markersBefore = h.Tracker.InvocationMarkerCountForTest("AgentExecutor.log");
+
+            var lines = string.Concat(Enumerable.Range(1, 600).Select(i => $"orphaned output line {i}\r\n"));
+            h.Append(lines);
+            h.Now = h.Now.AddMilliseconds(100);
+            await h.Pass();
+            h.Now = h.Now.AddMilliseconds(100);
+            await h.Pass();
+
+            Assert.Equal(markersBefore + 1, h.Tracker.InvocationMarkerCountForTest("AgentExecutor.log"));
+        }
+
+        [Theory]
+        [InlineData("<![LOG[Powershell exit code is 0]LOG]!><time=\"12:00:00.0000000\" date=\"9-10-2026\" component=\"AgentExecutor\" context=\"\" type=\"1\" thread=\"1\" file=\"\">", true)]
+        [InlineData("<![LOG[write output done. output = line one\nline two, error = ]LOG]!><time=\"12:00:00.0000000\" date=\"9-10-2026\" component=\"AgentExecutor\" context=\"\" type=\"1\" thread=\"1\" file=\"\">", true)]
+        [InlineData("\uFEFF<![LOG[ExecutorLog AgentExecutor gets invoked]LOG]!><time=\"12:00:00.0000000\" date=\"9-10-2026\" component=\"AgentExecutor\" context=\"\" type=\"1\" thread=\"1\" file=\"\">", true)]
+        [InlineData("t code is 3]LOG]!><time=\"12:00:00.0000000\" date=\"9-10-2026\" component=\"AgentExecutor\" context=\"\" type=\"1\" thread=\"1\" file=\"\">", false)]
+        [InlineData("", false)]
+        [InlineData("<![LOG[Powe<![LOG[Powershell exit code is 1]LOG]!><time=\"12:00:00.0000000\" date=\"9-10-2026\" component=\"AgentExecutor\" context=\"\" type=\"1\" thread=\"1\" file=\"\">", false)]
+        [InlineData("<![LOG[Powershell option gets invoked]LOG]!><time=\"12:00:00.0000000\" da<![LOG[Powershell exit code is 1]LOG]!><time=\"12:00:01.0000000\" date=\"9-10-2026\" component=\"AgentExecutor\" context=\"\" type=\"1\" thread=\"1\" file=\"\">", false)]
+        [InlineData("<![LOG[write output done. output = line one\nline<![LOG[Agent executor completed.]LOG]!><time=\"12:00:00.0000000\" date=\"9-10-2026\" component=\"AgentExecutor\" context=\"\" type=\"1\" thread=\"1\" file=\"\">", false)]
+        public void Single_cmtrace_record_is_told_apart_from_the_cut_of_two_writers(string text, bool expected)
+        {
+            Assert.Equal(expected, ImeLogTracker.IsSingleCmTraceRecord(text));
+        }
+
+        [Theory]
+        [InlineData("AgentExecutor.log", true)]
+        [InlineData("AgentExecutor-20261003-233348.log", true)]
+        [InlineData("IntuneManagementExtension.log", false)]
+        [InlineData("IntuneManagementExtension-20261003-233348.log", false)]
+        [InlineData("HealthScripts.log", false)]
+        [InlineData("AppWorkload.log", false)]
+        public void Writer_boundaries_apply_to_the_executor_log_live_and_rotated(string fileName, bool expected)
+        {
+            Assert.Equal(expected, ImeLogTracker.IsWriterBoundaryLogFile(fileName));
+        }
+    }
+}

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

@@ -25,7 +25,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.Ime
     /// contract: unchanged bytes never rewind, changed bytes are processed exactly once, and the
     /// executor lines a rewind uncovers belong to the invocation that owns their file position.
     /// </summary>
-    public sealed class ImeLogTrackerOverwriteRewindTests
+    public sealed partial class ImeLogTrackerOverwriteRewindTests
     {
         private static readonly DateTime T0 = new DateTime(2026, 9, 10, 19, 30, 0, DateTimeKind.Utc);
 
@@ -42,7 +42,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.Ime
         private static readonly string[] ScriptPatternIds =
         {
             "PS-AGENT-INVOCATION", "PS-AGENT-ARG", "PS-AGENT-SCRIPT-START", "PS-AGENT-EXITCODE",
-            "PS-AGENT-OUTPUT", "PS-AGENT-COMPLETED", "PS-SCRIPT-GENERATED", "PS-SCRIPT-CONTEXT", "PS-SCRIPT-RESULT",
+            "PS-AGENT-OUTPUT", "PS-AGENT-ERROR", "PS-AGENT-COMPLETED", "PS-SCRIPT-GENERATED", "PS-SCRIPT-CONTEXT", "PS-SCRIPT-RESULT",
         };
 
         /// <summary>The shipped pattern JSON — the same source combine.js embeds — so the contract is the real one.</summary>
@@ -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/ShellCoreTrackerBreadcrumbTests.cs

@@ -1,6 +1,7 @@
 #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;
@@ -10,6 +11,8 @@ 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;
 
 namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring
@@ -36,18 +39,31 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring
         private const string CspGateTrue =
             "CloudExperienceHost Web App Event 2. Name: 'ExpeditedUpdate_isNDUPAllowedByCSPSucceeded', Value: 'true'.";
 
+        // A French Windows labels the same fields "Résultat", "Nom" and "valeur" and quotes them
+        // in guillemets; the event properties carry the values unchanged in every language.
+        private const string FrenchNdupStarted = "Activité d’application web CloudExperienceHost démarrée. CXID : « OobeNDUP ».";
+        private const string FrenchPageStopped = "Activité d’application web CloudExperienceHost arrêtée. Résultat : « success ».";
+        private const string FrenchCspGate =
+            "Événement d’application web CloudExperienceHost 2. Nom : « ExpeditedUpdate_isNDUPAllowedByCSPSucceeded », valeur : « true ».";
+
         private readonly TempDirectory _tmp = new TempDirectory();
         private readonly FakeSignalIngressSink _sink = new FakeSignalIngressSink();
         private IReadOnlyList<OobeUpdateRegistrySnapshot.KeyState> _registry = Array.Empty<OobeUpdateRegistrySnapshot.KeyState>();
 
         public void Dispose() => _tmp.Dispose();
 
-        private ShellCoreTracker Build() =>
+        private ShellCoreTracker Build(string? stateDirectory = null) =>
             new ShellCoreTracker("S1", "T1",
                 new InformationalEventPost(_sink, new VirtualClock(At)),
                 new AgentLogger(_tmp.Path, AgentLogLevel.Info),
                 helloTracker: null,
-                oobeUpdateRegistryReader: () => _registry);
+                oobeUpdateRegistryReader: () => _registry,
+                stateDirectory: stateDirectory);
+
+        private string 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 IReadOnlyList<FakeSignalIngressSink.PostedSignal> ByType(string eventType) =>
             _sink.Posted.Where(p =>
@@ -158,16 +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);
 
@@ -274,6 +290,132 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring
             Assert.Equal(3, _sink.Posted.Count);
         }
 
+        // ------------------------------------------------------------ localization ----
+
+        [Fact]
+        public void LocalizedRecords_AreReadFromTheirProperties()
+        {
+            using var tracker = Build();
+
+            tracker.ProcessEvent(ShellCoreTracker.EventId_ShellCore_WebAppStarted, FrenchNdupStarted, At, "Microsoft-Windows-Shell-Core",
+                isBackfill: false, properties: new[] { "OobeNDUP" });
+            tracker.ProcessEvent(ShellCoreTracker.EventId_ShellCore_WebAppEvent, FrenchCspGate, At.AddSeconds(5), "Microsoft-Windows-Shell-Core",
+                isBackfill: false, properties: new[] { "ExpeditedUpdate_isNDUPAllowedByCSPSucceeded", "true" });
+            tracker.ProcessEvent(ShellCoreTracker.EventId_ShellCore_WebAppStopped, FrenchPageStopped, At.AddMinutes(1), "Microsoft-Windows-Shell-Core",
+                isBackfill: false, properties: new[] { "success" });
+
+            var pages = ByType(Constants.EventTypes.OobeUpdatePage).Select(Data).ToList();
+            Assert.Equal(new object[] { "page_started", "event_name", "page_stopped" }, pages.Select(d => d["cxhEvent"]).ToArray());
+            Assert.Equal("OobeNDUP", pages[0]["page"]);
+            Assert.Equal("ExpeditedUpdate_isNDUPAllowedByCSPSucceeded", pages[1]["name"]);
+            Assert.Equal("true", pages[1]["value"]);
+            Assert.Equal("OobeNDUP", pages[2]["page"]);
+            Assert.Equal("success", pages[2]["result"]);
+        }
+
+        [Fact]
+        public void LocalizedMessage_WithoutProperties_DoesNotYieldItsLabelledFields()
+        {
+            // Why the properties are read: the French labels are not the manifest's.
+            Assert.Null(ShellCoreTracker.ReadCxhFields(ShellCoreTracker.EventId_ShellCore_WebAppStopped, FrenchPageStopped, properties: null).Primary);
+            Assert.Null(ShellCoreTracker.ReadCxhFields(ShellCoreTracker.EventId_ShellCore_WebAppEvent, FrenchCspGate, properties: null).Primary);
+
+            Assert.Equal("success",
+                ShellCoreTracker.ReadCxhFields(ShellCoreTracker.EventId_ShellCore_WebAppStopped, FrenchPageStopped, new[] { "success" }).Primary);
+        }
+
+        [Theory]
+        [InlineData("CloudExperienceHost Web App Event 2. Name: 'ExpeditedUpdate_x', Value: 'true'.")]
+        [InlineData("CloudExperienceHost Web App Event 2. Name : « ExpeditedUpdate_x », Value : « true ».")]
+        [InlineData("CloudExperienceHost Web App Event 2. Name\u00A0: «\u202FExpeditedUpdate_x\u202F», Value\u00A0: «\u00A0true\u00A0».")]
+        public void MessageFallback_AcceptsQuotesAndGuillemets(string description)
+        {
+            var fields = ShellCoreTracker.ReadCxhFields(ShellCoreTracker.EventId_ShellCore_WebAppEvent, description, properties: null);
+
+            Assert.Equal("ExpeditedUpdate_x", fields.Primary);
+            Assert.Equal("true", fields.Value);
+        }
+
+        [Fact]
+        public void PropertyValue_LeavesTheTrackerOnlyInASafeForm()
+        {
+            var fields = ShellCoreTracker.ReadCxhFields(ShellCoreTracker.EventId_ShellCore_WebAppEvent, "",
+                new[] { "ExpeditedUpdate_commitExpeditionDownloadInstallAsyncSucceeded", "{\"url\":\"https://login.microsoftonline.com/x\"}" });
+
+            var record = ShellCoreTracker.ParseUpdatePageRecord(ShellCoreTracker.EventId_ShellCore_WebAppEvent, fields, lastPage: null);
+            Assert.Equal("ExpeditedUpdate_commitExpeditionDownloadInstallAsyncSucceeded", record!.Name);
+            Assert.Null(record.Value);
+            Assert.DoesNotContain("microsoftonline",
+                ShellCoreTracker.FormatCxhBreadcrumb(ShellCoreTracker.EventId_ShellCore_WebAppEvent, fields, lastPage: null));
+        }
+
+        // ------------------------------------------------------- restart watermark ----
+
+        [Fact]
+        public void RestartBackfill_SkipsUpdatePageRecords_AnEarlierRunReported()
+        {
+            using (var first = Build(StateDirectory))
+            {
+                Live(first, ShellCoreTracker.EventId_ShellCore_WebAppStarted, NdupStarted, At, recordId: 500);
+                Live(first, ShellCoreTracker.EventId_ShellCore_WebAppEventName, ScanStartedName, At.AddMinutes(1), recordId: 501);
+            }
+
+            // The restart reads the minutes before it again — plus the stop the first run missed.
+            using var second = Build(StateDirectory);
+            second.LoadPageWatermark();
+            second.ReplayBackfillRecords(new[]
+            {
+                new ShellCoreRecord(ShellCoreTracker.EventId_ShellCore_WebAppStarted, NdupStarted, At, recordId: 500),
+                new ShellCoreRecord(ShellCoreTracker.EventId_ShellCore_WebAppEventName, ScanStartedName, At.AddMinutes(1), recordId: 501),
+                new ShellCoreRecord(ShellCoreTracker.EventId_ShellCore_WebAppStopped, PageStopped, At.AddMinutes(2), recordId: 502),
+            });
+
+            var pages = ByType(Constants.EventTypes.OobeUpdatePage).Select(Data).ToList();
+            Assert.Equal(new object[] { "page_started", "event_name", "page_stopped" }, pages.Select(d => d["cxhEvent"]).ToArray());
+            Assert.Equal(new object[] { false, false, true }, pages.Select(d => d["backfill"]).ToArray());
+            // The skipped start still names the page the stop belongs to.
+            Assert.Equal("OobeNDUP", pages[2]["page"]);
+        }
+
+        [Fact]
+        public void SameRecord_FromTheLiveWatcherAndTheBackfill_IsReportedOnce()
+        {
+            // The live watcher is armed before the backfill runs, so both can deliver a record.
+            using var tracker = Build(StateDirectory);
+            Live(tracker, ShellCoreTracker.EventId_ShellCore_WebAppStarted, NdupStarted, At, recordId: 700);
+            tracker.ReplayBackfillRecords(new[]
+            {
+                new ShellCoreRecord(ShellCoreTracker.EventId_ShellCore_WebAppStarted, NdupStarted, At, recordId: 700),
+            });
+
+            Assert.Single(ByType(Constants.EventTypes.OobeUpdatePage));
+        }
+
+        [Fact]
+        public void Watermark_FollowsReportedRecordsOnly()
+        {
+            using var tracker = Build(StateDirectory);
+            for (var i = 0; i <= OobeUpdateTelemetry.MaxPageEventsPerKey; i++)
+                Live(tracker, ShellCoreTracker.EventId_ShellCore_WebAppEventName, ScanStartedName, At.AddSeconds(i), recordId: 800 + i);
+
+            // The repeat over the per-name cap is claimed for this run, not written down.
+            Assert.Equal(OobeUpdateTelemetry.MaxPageEventsPerKey, ByType(Constants.EventTypes.OobeUpdatePage).Count);
+            var state = JsonConvert.DeserializeObject<EventRecordWatermark.WatermarkState>(
+                File.ReadAllText(Path.Combine(StateDirectory, ShellCoreTracker.PageWatermarkStateFileName)));
+            Assert.Equal(800 + OobeUpdateTelemetry.MaxPageEventsPerKey - 1, state!.LastRecordId);
+        }
+
+        [Fact]
+        public void RecordsWithoutARecordId_AreNotDeduplicated()
+        {
+            using var tracker = Build(StateDirectory);
+            Live(tracker, ShellCoreTracker.EventId_ShellCore_WebAppStarted, NdupStarted, At, recordId: -1);
+            Live(tracker, ShellCoreTracker.EventId_ShellCore_WebAppStarted, NdupStarted, At.AddMinutes(5), recordId: -1);
+
+            Assert.Equal(2, ByType(Constants.EventTypes.OobeUpdatePage).Count);
+            Assert.False(File.Exists(Path.Combine(StateDirectory, ShellCoreTracker.PageWatermarkStateFileName)));
+        }
+
         [Fact]
         public void AgentStartAndStop_ReportTheRegistryState_StopOnce()
         {

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

@@ -84,6 +84,55 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring
             Assert.False(raised);
         }
 
+        [Fact]
+        public void ProcessEvent_62404_NGC_in_a_localized_message_is_read_from_the_cxid_property()
+        {
+            // A French Windows quotes the CXID in guillemets — the "'NGC'" substring never matched.
+            using var tmp = new TempDirectory();
+            using var tracker = MakeTracker(tmp, new VirtualClock(ClockNow));
+            var raised = 0;
+            tracker.HelloWizardStarted += (_, _) => raised++;
+
+            tracker.ProcessEvent(
+                eventId: ShellCoreTracker.EventId_ShellCore_WebAppStarted,
+                description: "Activité d’application web CloudExperienceHost démarrée. CXID : « NGC ».",
+                timestamp: ClockNow,
+                providerName: "Microsoft-Windows-Shell-Core",
+                isBackfill: false,
+                properties: new[] { "NGC" });
+
+            Assert.Equal(1, raised);
+        }
+
+        [Theory]
+        [InlineData("AADHello", true)]
+        [InlineData("NGC", true)]
+        [InlineData("NGCPin", false)]
+        [InlineData("OobeNDUP", false)]
+        public void HelloWizardStart_is_decided_by_the_cxid(string cxid, bool expected)
+        {
+            Assert.Equal(expected, ShellCoreTracker.IsHelloWizardStart(cxid, description: "CXID: 'AADHello'"));
+        }
+
+        [Fact]
+        public void Backfill_62404_reads_the_cxid_property()
+        {
+            using var tmp = new TempDirectory();
+            using var tracker = MakeTracker(tmp, new VirtualClock(ClockNow));
+            var captured = new List<HelloWizardStartedEventArgs>();
+            tracker.HelloWizardStarted += (_, args) => captured.Add(args);
+
+            var historical = ClockNow.AddMinutes(-3);
+            tracker.ReplayBackfillRecords(new[]
+            {
+                new ShellCoreRecord(ShellCoreTracker.EventId_ShellCore_WebAppStarted,
+                    "Activité d’application web CloudExperienceHost démarrée. CXID : « NGC ».", historical,
+                    recordId: 42, properties: new[] { "NGC" }),
+            });
+
+            Assert.Equal(historical, Assert.Single(captured).OccurredAtUtc);
+        }
+
         [Fact]
         public void Backfill_62404_raises_once_with_historical_timestamp()
         {

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/ImeRegistryScriptResultObserverTests.cs

@@ -0,0 +1,411 @@
+#nullable enable
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime;
+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 Xunit;
+using SharedEventTypes = AutopilotMonitor.Shared.Constants.EventTypes;
+
+namespace AutopilotMonitor.Agent.V2.Core.Tests.Monitoring.SystemSignals
+{
+    /// <summary>
+    /// D-316: IME saves every platform script's result under Policies\&lt;user&gt;\&lt;policy&gt; after reporting the
+    /// batch; the observer checks the tracker's emitted run against it. The field case (session 756970cf): the run
+    /// had been given a Win32 detection script's end block — exit 1 and "Detection Started" output — while IME saved
+    /// the bootstrap output of the platform script itself.
+    /// </summary>
+    public sealed class ImeRegistryScriptResultObserverTests
+    {
+        private const string DeviceUser = "00000000-0000-0000-0000-000000000000";
+        private const string PolicyA = "1d6f0a52-3c4e-4b7a-9e21-5f8c7d2b9a10";
+        private const string PolicyB = "2b7d9e41-8c3a-4f60-a5d2-9e1b7c4f3a08";
+        private const string OwnStdout = "=== bootstrap loader started ===\nInstaller finished (exit code 0).";
+        private const string ForeignStdout = "VERBOSE: === Sample Suite Detection Started ===\nWARNING: === DETECTION FAILED ===";
+        private static readonly DateTime T0 = new DateTime(2026, 10, 3, 20, 59, 0, DateTimeKind.Utc);
+
+        // ── PlatformOutputJudge ─────────────────────────────────────────────────
+
+        private static PlatformScriptRun Run(string? stdout, string? stderr = null, int? exitCode = 0, string result = "Success", string resultSource = "ime_policy_result")
+            => new PlatformScriptRun { PolicyId = PolicyA, UserId = DeviceUser, RunId = "run-1", Emitted = true, Result = result, ResultSource = resultSource, ExitCode = exitCode, Stdout = stdout, Stderr = stderr };
+
+        private static string Details(string executionMessage)
+            => "{\"Version\":1,\"SigningCode\":15,\"EncryptionCode\":19,\"ExecutionMsg\":" + System.Text.Json.JsonSerializer.Serialize(executionMessage) + "}";
+
+        private static SavedScriptResult Saved(string? executionMessage, string result = "Success", int errorCode = 0, string user = DeviceUser, string policy = PolicyA, string stamp = "10/3/2026 9:00:00 PM")
+            => new SavedScriptResult
+            {
+                UserId = user,
+                PolicyId = policy,
+                Result = result,
+                ErrorCode = errorCode,
+                ResultDetails = executionMessage == null ? null : Details(executionMessage),
+                LastUpdatedTimeUtc = stamp,
+            };
+
+        [Fact]
+        public void Field_case_detection_output_on_the_platform_run_is_foreign_and_the_saved_stdout_replaces_it()
+        {
+            var judgement = PlatformOutputJudge.Judge(Run(ForeignStdout, string.Empty, exitCode: 1), Saved(OwnStdout.Replace("\n", "\r\n")));
+            Assert.Equal(PlatformOutputVerdict.Foreign, judgement.Verdict);
+            Assert.Equal("stdout_differs", judgement.Reason);
+            Assert.Equal(OwnStdout, judgement.Stdout);
+            Assert.Equal(string.Empty, judgement.Stderr);
+        }
+
+        [Fact]
+        public void Matching_output_is_verified_across_line_ending_and_trim_differences()
+        {
+            var judgement = PlatformOutputJudge.Judge(Run(OwnStdout, string.Empty), Saved("  " + OwnStdout.Replace("\n", "\r\n") + "\r\n"));
+            Assert.Equal(PlatformOutputVerdict.Verified, judgement.Verdict);
+        }
+
+        [Fact]
+        public void Output_cut_by_the_tracker_is_verified_against_the_longer_saved_text()
+        {
+            var full = string.Concat(Enumerable.Repeat("line of output\n", 1000)).TrimEnd();
+            var emitted = ImeLogTracker.TruncateOutput(full);
+            Assert.EndsWith(ImeLogTracker.OutputTruncationMarker, emitted);
+            Assert.Equal(PlatformOutputVerdict.Verified, PlatformOutputJudge.Judge(Run(emitted), Saved(full)).Verdict);
+        }
+
+        [Fact]
+        public void Both_empty_is_verified_but_stderr_on_a_success_is_another_executors()
+        {
+            Assert.Equal(PlatformOutputVerdict.Verified, PlatformOutputJudge.Judge(Run(string.Empty), Saved(string.Empty)).Verdict);
+            var judgement = PlatformOutputJudge.Judge(Run(string.Empty, "Get-Item : not found"), Saved(string.Empty));
+            Assert.Equal(PlatformOutputVerdict.Foreign, judgement.Verdict);
+            Assert.Equal("stderr_on_success", judgement.Reason);
+        }
+
+        [Fact]
+        public void Explicitly_empty_emitted_output_against_saved_text_is_foreign()
+        {
+            Assert.Equal(PlatformOutputVerdict.Foreign, PlatformOutputJudge.Judge(Run(string.Empty), Saved(OwnStdout)).Verdict);
+            Assert.Equal(PlatformOutputVerdict.Foreign, PlatformOutputJudge.Judge(Run(OwnStdout), Saved(string.Empty)).Verdict);
+        }
+
+        [Fact]
+        public void Output_never_read_is_completed_from_the_saved_text_and_the_exit_code_stands()
+        {
+            var judgement = PlatformOutputJudge.Judge(Run(null), Saved(OwnStdout));
+            Assert.Equal(PlatformOutputVerdict.Repaired, judgement.Verdict);
+            Assert.Equal("stdout_missing", judgement.Reason);
+            Assert.Equal(OwnStdout, judgement.Stdout);
+            Assert.Equal(PlatformOutputVerdict.NotComparable, PlatformOutputJudge.Judge(Run(null), Saved(string.Empty)).Verdict);
+        }
+
+        [Fact]
+        public void Stdout_containing_the_output_error_separator_is_repaired_not_foreign()
+        {
+            // "write output done. output = X, error = " with X = "Copying files, error = 0 errors\nDone": the
+            // lazy split leaves "Copying files" as stdout and the rest as stderr.
+            var judgement = PlatformOutputJudge.Judge(
+                Run("Copying files", "0 errors\nDone, error ="),
+                Saved("Copying files, error = 0 errors\r\nDone"));
+            Assert.Equal(PlatformOutputVerdict.Repaired, judgement.Verdict);
+            Assert.Equal("stdout_split", judgement.Reason);
+            Assert.Equal("Copying files, error = 0 errors\nDone", judgement.Stdout);
+            Assert.Equal(string.Empty, judgement.Stderr);
+        }
+
+        [Fact]
+        public void A_prefix_without_the_split_explanation_is_foreign()
+        {
+            Assert.Equal(PlatformOutputVerdict.Foreign, PlatformOutputJudge.Judge(Run("Detected"), Saved("Detected and repaired")).Verdict);
+        }
+
+        [Fact]
+        public void Failed_with_stderr_is_judged_on_stderr()
+        {
+            Assert.Equal(PlatformOutputVerdict.Verified,
+                PlatformOutputJudge.Judge(Run("partial", "Access denied", 1, "Failed"), Saved("Access denied\r\n", "Failed", 99)).Verdict);
+
+            var missing = PlatformOutputJudge.Judge(Run(null, null, 1, "Failed"), Saved("Access denied", "Failed", 99));
+            Assert.Equal(PlatformOutputVerdict.Repaired, missing.Verdict);
+            Assert.Null(missing.Stdout);
+            Assert.Equal("Access denied", missing.Stderr);
+
+            var foreign = PlatformOutputJudge.Judge(Run("Detected", string.Empty, 0, "Failed"), Saved("Access denied", "Failed", 99));
+            Assert.Equal(PlatformOutputVerdict.Foreign, foreign.Verdict);
+            Assert.Equal(string.Empty, foreign.Stdout);
+            Assert.Equal("Access denied", foreign.Stderr);
+        }
+
+        [Fact]
+        public void Results_without_saved_output_or_from_another_run_are_not_compared()
+        {
+            Assert.Equal("no_saved_output", PlatformOutputJudge.Judge(Run(OwnStdout, null, 1, "Failed"), Saved("1", "Failed", 1)).Reason);
+            var hashMismatch = new SavedScriptResult { UserId = DeviceUser, PolicyId = PolicyA, Result = "Failed", ErrorCode = 2, ResultDetails = "Hash mismatch" };
+            Assert.Equal("no_execution_message", PlatformOutputJudge.Judge(Run(OwnStdout, null, 1, "Failed"), hashMismatch).Reason);
+            Assert.Equal("result_differs", PlatformOutputJudge.Judge(Run(OwnStdout), Saved("Access denied", "Failed", 99)).Reason);
+            // A result derived from the exit code (fallback) is not IME's — the saved one is.
+            Assert.Equal(PlatformOutputVerdict.Verified,
+                PlatformOutputJudge.Judge(Run(OwnStdout, null, 1, "Failed", "agentexecutor_fallback"), Saved(OwnStdout)).Verdict);
+        }
+
+        // ── PlatformScriptRunRegister ───────────────────────────────────────────
+
+        private static ScriptExecutionState Emitted(string policyId, string? stdout, int? exitCode = 0, string? userId = DeviceUser, string runId = "run-1")
+            => new ScriptExecutionState { PolicyId = policyId, ScriptType = "platform", UserId = userId, RunId = runId, Result = "Success", ResultSource = "ime_policy_result", ExitCode = exitCode, Stdout = stdout };
+
+        [Fact]
+        public void A_save_is_paired_only_after_the_tracker_read_past_it_and_the_run_was_emitted()
+        {
+            var runs = new PlatformScriptRunRegister();
+            runs.NoteStarted(DeviceUser, PolicyA, T0);
+            var seen = T0.AddSeconds(30);
+
+            Assert.Equal(PlatformRunClaim.Wait, runs.TryClaim(DeviceUser, PolicyA, seen, out _));
+            runs.NotePassCompleted(seen.AddSeconds(1));
+            Assert.Equal(PlatformRunClaim.Wait, runs.TryClaim(DeviceUser, PolicyA, seen, out _)); // pass started too early
+            runs.NotePassCompleted(seen + PlatformScriptRunRegister.TrackerCatchUp);
+            Assert.Equal(PlatformRunClaim.Wait, runs.TryClaim(DeviceUser, PolicyA, seen, out _)); // run not emitted yet
+
+            runs.NoteEmitted(Emitted(PolicyA, OwnStdout), T0.AddSeconds(40));
+            Assert.Equal(PlatformRunClaim.Claimed, runs.TryClaim(DeviceUser, PolicyA, seen, out var run));
+            Assert.Equal("run-1", run!.RunId);
+            Assert.Equal(OwnStdout, run.Stdout);
+            Assert.Equal(PlatformRunClaim.None, runs.TryClaim(DeviceUser, PolicyA, seen, out _)); // never twice
+        }
+
+        [Fact]
+        public void A_new_start_replaces_the_latest_run_of_its_key_and_other_users_stay_apart()
+        {
+            var runs = new PlatformScriptRunRegister();
+            runs.NoteStarted(DeviceUser, PolicyA, T0);
+            runs.NoteEmitted(Emitted(PolicyA, "first run"), T0.AddSeconds(5));
+            runs.NoteStarted(DeviceUser, PolicyA, T0.AddMinutes(30));
+            runs.NoteEmitted(Emitted(PolicyA, "second run", runId: "run-2"), T0.AddMinutes(30).AddSeconds(5));
+            const string user = "6c3f8a20-1d5e-4b97-8f4a-0e2d6b9c7a13";
+            runs.NoteStarted(user, PolicyA, T0.AddMinutes(31));
+            runs.NotePassCompleted(T0.AddHours(1));
+
+            Assert.Equal(PlatformRunClaim.Claimed, runs.TryClaim(DeviceUser, PolicyA, T0.AddMinutes(31), out var run));
+            Assert.Equal("second run", run!.Stdout);
+            Assert.Equal(PlatformRunClaim.Wait, runs.TryClaim(user, PolicyA, T0.AddMinutes(32), out _));
+            Assert.Equal(PlatformRunClaim.None, runs.TryClaim(DeviceUser, PolicyB, T0.AddMinutes(32), out _));
+        }
+
+        [Fact]
+        public void A_run_without_a_readable_user_id_is_claimed_by_its_policy()
+        {
+            var runs = new PlatformScriptRunRegister();
+            runs.NoteStarted(null, PolicyA, T0);
+            runs.NoteEmitted(Emitted(PolicyA, OwnStdout, userId: null), T0.AddSeconds(5));
+            runs.NotePassCompleted(T0.AddMinutes(5));
+            Assert.Equal(PlatformRunClaim.Claimed, runs.TryClaim(DeviceUser, PolicyA, T0.AddMinutes(1), out _));
+        }
+
+        [Fact]
+        public void Register_keeps_the_newest_runs_and_its_counters_report_each_change_once()
+        {
+            var runs = new PlatformScriptRunRegister();
+            for (var i = 0; i <= PlatformScriptRunRegister.MaxRuns; i++)
+                runs.NoteStarted(DeviceUser, Guid.NewGuid().ToString("D"), T0.AddSeconds(i));
+            runs.NoteStarted(DeviceUser, PolicyA, T0.AddHours(1));
+            runs.NoteEmitted(Emitted(PolicyA, OwnStdout), T0.AddHours(1));
+            runs.NotePassCompleted(T0.AddHours(2));
+            Assert.Equal(PlatformRunClaim.Claimed, runs.TryClaim(DeviceUser, PolicyA, T0.AddHours(1), out _));
+
+            Assert.False(runs.ConsumeCountersChanged());
+            runs.CountVerified();
+            runs.CountCorrected();
+            Assert.True(runs.ConsumeCountersChanged());
+            Assert.False(runs.ConsumeCountersChanged());
+            Assert.Equal(1, runs.Verified);
+            runs.RestoreCounters(7, 3);
+            Assert.Equal(7, runs.Verified);
+            Assert.Equal(3, runs.Corrected);
+        }
+
+        // ── observer flow ───────────────────────────────────────────────────────
+
+        private sealed class Fixture
+        {
+            public readonly FakeSignalIngressSink Sink = new FakeSignalIngressSink();
+            public readonly VirtualClock Clock = new VirtualClock(T0);
+            public readonly PlatformScriptRunRegister Runs = new PlatformScriptRunRegister();
+            public Dictionary<string, SavedScriptResult> Registry = new Dictionary<string, SavedScriptResult>(StringComparer.OrdinalIgnoreCase);
+            public readonly ImeRegistryScriptResultObserver Observer;
+
+            public Fixture()
+            {
+                Observer = new ImeRegistryScriptResultObserver(Runs, new InformationalEventPost(Sink, Clock), null, Clock,
+                    () => new Dictionary<string, SavedScriptResult>(Registry, StringComparer.OrdinalIgnoreCase));
+            }
+
+            public void Save(SavedScriptResult saved) => Registry[ImeRegistryScriptResultObserver.KeyOf(saved.UserId, saved.PolicyId)] = saved;
+
+            /// <summary>The tracker emitted a run, then kept polling past the save.</summary>
+            public void EmitRun(string policyId, string? stdout, int? exitCode, string runId)
+            {
+                Runs.NoteStarted(DeviceUser, policyId, Clock.UtcNow);
+                Runs.NoteEmitted(Emitted(policyId, stdout, exitCode, runId: runId), Clock.UtcNow);
+            }
+
+            public void TrackerCaughtUp() => Runs.NotePassCompleted(Clock.UtcNow);
+
+            public IReadOnlyList<FakeSignalIngressSink.PostedSignal> Corrections()
+                => Sink.Posted.Where(p => p.Payload != null
+                    && p.Payload.TryGetValue(SignalPayloadKeys.EventType, out var et)
+                    && et == SharedEventTypes.ScriptOutputReconciliation).ToList();
+        }
+
+        [Fact]
+        public void Field_case_end_to_end_the_save_corrects_the_run_with_a_warning_naming_it()
+        {
+            var f = new Fixture();
+            f.Save(Saved("an older run of another policy", policy: PolicyB, stamp: "10/2/2026 8:00:00 AM"));
+            f.Observer.Tick("baseline");
+
+            f.EmitRun(PolicyA, ForeignStdout, 1, "run-a");
+            f.Save(Saved(OwnStdout));
+            f.Clock.Advance(TimeSpan.FromSeconds(1));
+            f.Observer.Tick("registry_change");
+            Assert.Empty(f.Corrections()); // the tracker has not read past the save yet
+
+            f.Clock.Advance(PlatformScriptRunRegister.TrackerCatchUp);
+            f.TrackerCaughtUp();
+            f.Observer.Tick("periodic");
+
+            var correction = Assert.Single(f.Corrections());
+            var data = correction.Payload!;
+            Assert.Equal(PolicyA, data["policyId"]);
+            Assert.Equal("platform", data["scriptType"]);
+            Assert.Equal("run-a", data["runId"]);
+            Assert.Equal("foreign", data["outcome"]);
+            Assert.Equal("stdout_differs", data["reason"]);
+            Assert.Equal("Success", data["result"]);
+            Assert.Equal(OwnStdout, data["stdout"]);
+            Assert.Equal(string.Empty, data["stderr"]);
+            Assert.Equal("1", data["previousExitCode"]);
+            Assert.Equal("0", data["registryErrorCode"]);
+            Assert.Equal("Warning", data[SignalPayloadKeys.Severity]);
+            Assert.Equal("true", data[SignalPayloadKeys.ImmediateUpload]);
+            Assert.DoesNotContain("exitCode", data.Keys);
+            Assert.Equal(1, f.Runs.Corrected);
+            Assert.Equal(0, f.Runs.Verified);
+
+            // The same save read again changes nothing.
+            f.Clock.Advance(TimeSpan.FromMinutes(1));
+            f.TrackerCaughtUp();
+            f.Observer.Tick("periodic");
+            Assert.Single(f.Corrections());
+        }
+
+        [Fact]
+        public void Confirmed_output_is_counted_and_emits_nothing()
+        {
+            var f = new Fixture();
+            f.Observer.Tick("baseline");
+            f.EmitRun(PolicyA, OwnStdout, 0, "run-a");
+            f.Save(Saved(OwnStdout));
+            f.Clock.Advance(TimeSpan.FromSeconds(1));
+            f.Observer.Tick("registry_change");
+            f.Clock.Advance(TimeSpan.FromSeconds(3));
+            f.TrackerCaughtUp();
+            f.Observer.Tick("periodic");
+
+            Assert.Empty(f.Corrections());
+            Assert.Equal(1, f.Runs.Verified);
+        }
+
+        [Fact]
+        public void Completed_output_is_an_info_event_that_keeps_the_exit_code()
+        {
+            var f = new Fixture();
+            f.Observer.Tick("baseline");
+            f.EmitRun(PolicyA, null, 0, "run-a");
+            f.Save(Saved(OwnStdout));
+            f.Clock.Advance(TimeSpan.FromSeconds(1));
+            f.Observer.Tick("registry_change");
+            f.Clock.Advance(TimeSpan.FromSeconds(3));
+            f.TrackerCaughtUp();
+            f.Observer.Tick("periodic");
+
+            var data = Assert.Single(f.Corrections()).Payload!;
+            Assert.Equal("repaired", data["outcome"]);
+            Assert.Equal("Info", data[SignalPayloadKeys.Severity]);
+            Assert.DoesNotContain("previousExitCode", data.Keys);
+        }
+
+        [Fact]
+        public void A_save_seen_before_its_run_was_emitted_waits_for_the_emit()
+        {
+            var f = new Fixture();
+            f.Observer.Tick("baseline");
+            f.Runs.NoteStarted(DeviceUser, PolicyA, f.Clock.UtcNow); // result held for its end block
+            f.Save(Saved(OwnStdout));
+            f.Observer.Tick("registry_change");
+            f.Clock.Advance(TimeSpan.FromSeconds(3));
+            f.TrackerCaughtUp();
+            f.Observer.Tick("periodic");
+            Assert.Equal(0, f.Runs.Verified + f.Runs.Corrected);
+
+            f.Runs.NoteEmitted(Emitted(PolicyA, ForeignStdout, 1, runId: "run-a"), f.Clock.UtcNow);
+            f.Clock.Advance(TimeSpan.FromSeconds(60));
+            f.Observer.Tick("periodic");
+            Assert.Equal("foreign", Assert.Single(f.Corrections()).Payload!["outcome"]);
+        }
+
+        [Fact]
+        public void A_save_no_run_claims_within_the_expiry_is_dropped()
+        {
+            var f = new Fixture();
+            f.Observer.Tick("baseline");
+            f.Save(Saved(OwnStdout));
+            f.Observer.Tick("registry_change");
+            f.Clock.Advance(ImeRegistryScriptResultObserver.PendingExpiry);
+            f.TrackerCaughtUp();
+            f.Runs.NoteStarted(DeviceUser, PolicyA, f.Clock.UtcNow);
+            f.Observer.Tick("periodic"); // waits for the emit — and expires
+
+            f.Runs.NoteEmitted(Emitted(PolicyA, ForeignStdout, 1, runId: "run-a"), f.Clock.UtcNow);
+            f.Clock.Advance(TimeSpan.FromSeconds(60));
+            f.TrackerCaughtUp();
+            f.Observer.Tick("periodic");
+            Assert.Empty(f.Corrections());
+        }
+
+        [Fact]
+        public void Saves_from_before_the_agent_started_are_the_silent_baseline()
+        {
+            var f = new Fixture();
+            f.EmitRun(PolicyA, ForeignStdout, 1, "run-a");
+            f.Save(Saved(OwnStdout));
+            f.TrackerCaughtUp();
+            f.Observer.Tick("baseline");
+            f.Clock.Advance(TimeSpan.FromMinutes(1));
+            f.TrackerCaughtUp();
+            f.Observer.Tick("periodic");
+
+            Assert.Empty(f.Corrections());
+            Assert.Equal(0, f.Runs.Verified + f.Runs.Corrected);
+        }
+
+        [Fact]
+        public void Corrections_beyond_the_cap_are_counted_but_not_emitted()
+        {
+            var f = new Fixture();
+            f.Observer.Tick("baseline");
+            var policies = Enumerable.Range(0, ImeRegistryScriptResultObserver.MaxCorrectionsPerSession + 3).Select(_ => Guid.NewGuid().ToString("D")).ToList();
+            foreach (var policy in policies)
+            {
+                f.EmitRun(policy, ForeignStdout, 1, "run-" + policy);
+                f.Save(Saved(OwnStdout, policy: policy));
+            }
+            f.Observer.Tick("registry_change");
+            f.Clock.Advance(TimeSpan.FromSeconds(3));
+            f.TrackerCaughtUp();
+            f.Observer.Tick("periodic");
+
+            Assert.Equal(ImeRegistryScriptResultObserver.MaxCorrectionsPerSession, f.Corrections().Count);
+            Assert.Equal(policies.Count, f.Runs.Corrected);
+        }
+    }
+}

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 +102,73 @@ 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]
+        public void PageStartAndStop_AreReported_AfterTheNameBudgetIsSpent()
+        {
+            // The time attribution reads the update's span from the page start and stop.
+            var telemetry = Build();
+            for (var i = 0; i < OobeUpdateTelemetry.MaxPageEventsPerRun; i++)
+            {
+                Assert.True(telemetry.ReportPage(new OobeUpdatePageRecord(OobeUpdateVocabulary.EventName, 62406, name: $"ExpeditedUpdate_step{i}"), At, 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 + 3, pages.Count);
+            Assert.Equal(new object[] { OobeUpdateVocabulary.NamesCapped, "page_started", "page_stopped" },
+                pages.Skip(OobeUpdateTelemetry.MaxPageEventsPerRun).Select(p => Data(p)["cxhEvent"]).ToArray());
+        }
+
+        [Fact]
+        public void SamePageStart_IsReportedAtMostThreeTimes()
+        {
+            // 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(OobeUpdateVocabulary.PageStarted, 62404, page: "OobeNDUP"), At.AddMinutes(i), isBackfill: false));
+
+            Assert.Equal(OobeUpdateTelemetry.MaxPageEventsPerKey, reported);
         }
 
         // ------------------------------------------------------------ oobe_update_state ----

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/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/LifecycleEmittersRemoteConfigTests.cs

@@ -182,7 +182,7 @@ 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/SignalAdapters/ImeLogTrackerAdapterPlatformRunTests.cs

@@ -0,0 +1,54 @@
+using System;
+using AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime;
+using AutopilotMonitor.Agent.V2.Core.SignalAdapters;
+using AutopilotMonitor.Agent.V2.Core.Tests.Harness;
+using SharedEventTypes = AutopilotMonitor.Shared.Constants.EventTypes;
+using Xunit;
+
+namespace AutopilotMonitor.Agent.V2.Core.Tests.SignalAdapters
+{
+    /// <summary>
+    /// D-316: every emitted platform-script completion carries a run id, and the tracker's run register holds what
+    /// was emitted for it under the IME user id — what the registry reconciliation pairs IME's saved result with.
+    /// </summary>
+    public sealed class ImeLogTrackerAdapterPlatformRunTests
+    {
+        private static readonly DateTime ClockNow = new DateTime(2026, 10, 3, 21, 0, 0, DateTimeKind.Utc);
+        private const string DeviceUser = "00000000-0000-0000-0000-000000000000";
+        private const string PolicyId = "1d6f0a52-3c4e-4b7a-9e21-5f8c7d2b9a10";
+
+        [Fact]
+        public void Platform_completion_carries_its_run_id_and_the_register_holds_the_emitted_run()
+        {
+            using var f = new ImeLogTrackerAdapterFixture(ClockNow);
+            using var adapter = new ImeLogTrackerAdapter(f.Tracker, f.Ingress, f.Clock);
+
+            f.Tracker.LastMatchedLogTimestamp = ClockNow.AddSeconds(-10);
+            f.Tracker.HandlePlatformScriptStarted(PolicyId, "ime", DeviceUser);
+            f.Tracker.RecordPlatformScriptExitCodeForTesting(PolicyId, 0, ClockNow.AddSeconds(-1));
+            f.Tracker.LastMatchedLogTimestamp = ClockNow;
+            f.Tracker.CompletePlatformScriptFromImeResultForTesting(PolicyId, "Success", ClockNow);
+
+            var info = f.InfoEvent(SharedEventTypes.ScriptCompleted);
+            Assert.True(Guid.TryParse(info.Payload!["runId"], out _));
+
+            f.Tracker.ScriptRuns.NotePassCompleted(ClockNow.AddMinutes(1));
+            Assert.Equal(PlatformRunClaim.Claimed, f.Tracker.ScriptRuns.TryClaim(DeviceUser, PolicyId, ClockNow.AddSeconds(5), out var run));
+            Assert.Equal(info.Payload["runId"], run!.RunId);
+            Assert.Equal(0, run.ExitCode);
+            Assert.Equal("Success", run.Result);
+        }
+
+        [Theory]
+        [InlineData("[PowerShell] User Id = 00000000-0000-0000-0000-000000000000, Policy id = d94468af-6ebe-4e94-9901-2a62d33ea6c1, policy result = Success", "00000000-0000-0000-0000-000000000000")]
+        [InlineData(@"Adding argument powershell with value C:\Program Files (x86)\Microsoft Intune Management Extension\Policies\Scripts\6C3F8A20-1D5E-4B97-8F4A-0E2D6B9C7A13_d94468af-6ebe-4e94-9901-2a62d33ea6c1.ps1", "6c3f8a20-1d5e-4b97-8f4a-0e2d6b9c7a13")]
+        [InlineData(@"Script file C:\Program Files (x86)\Microsoft Intune Management Extension\Policies\Scripts\00000000-0000-0000-0000-000000000000_d94468af-6ebe-4e94-9901-2a62d33ea6c1.ps1 is generated", "00000000-0000-0000-0000-000000000000")]
+        [InlineData(@"Adding argument powershellDetection with value C:\Program Files (x86)\Microsoft Intune Management Extension\Content\DetectionScripts\8b2e4c71-6a9d-4f03-b5e8-2c7a1d9f4e36_2.ps1", null)]
+        [InlineData("[PowerShell] User Id = not-a-guid, Policy id = d94468af", null)]
+        [InlineData("", null)]
+        public void Ime_user_id_is_read_from_the_result_line_and_the_script_path(string text, string? expected)
+        {
+            Assert.Equal(expected, ImeLogTracker.ImeUserIdFrom(text));
+        }
+    }
+}

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

@@ -310,6 +310,19 @@ 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 +471,52 @@ 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.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);
+        }
+
+        [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

@@ -14,7 +14,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Tests.Transport
     /// 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
+    /// "device is not authorized". Field case 2026-08-09: a pre-cutover agent hit
     /// the stopped legacy Function App and support chased a non-existent authorization problem.
     /// </summary>
     public sealed class BackendApiClientAuthClassificationTests

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

@@ -275,9 +275,44 @@ 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 +68,12 @@ 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;
+        }
+
         public FakeBackendTelemetryUploader QueueThrow(Exception ex)
         {
             _script.Enqueue(_ => throw ex);

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/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/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");

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

@@ -271,17 +271,42 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
             }
             else
             {
-                HandlePlatformScriptStarted(id, source);
+                HandlePlatformScriptStarted(id, source, ImeUserIdFrom(match.Value));
             }
         }
 
+        /// <summary>
+        /// The IME user id on a platform-script line — <c>User Id = {id}</c> on the result line,
+        /// <c>…\Policies\Scripts\{id}_{policy}.ps1</c> on the start lines — or null. Read from the
+        /// matched text, not from a capture group, so it works with every pattern pack the agent may
+        /// be served.
+        /// </summary>
+        internal static string ImeUserIdFrom(string text)
+        {
+            if (string.IsNullOrEmpty(text)) return null;
+            const string resultTag = "User Id = ";
+            const string pathTag = @"\Policies\Scripts\";
+            var i = text.IndexOf(resultTag, StringComparison.OrdinalIgnoreCase);
+            if (i >= 0) return GuidAt(text, i + resultTag.Length);
+            i = text.IndexOf(pathTag, StringComparison.OrdinalIgnoreCase);
+            return i >= 0 ? GuidAt(text, i + pathTag.Length) : null;
+        }
+
+        private static string GuidAt(string text, int start)
+        {
+            if (start + 36 > text.Length) return null;
+            var candidate = text.Substring(start, 36);
+            return Guid.TryParse(candidate, out _) ? candidate.ToLowerInvariant() : null;
+        }
+
         // Platform script: AgentExecutor.log entries create/enrich, IME log entries also create.
         // Internal so the stale-slot hardening is directly testable (the public path arrives via
         // a regex Match).
-        internal void HandlePlatformScriptStarted(string id, string source = null)
+        internal void HandlePlatformScriptStarted(string id, string source = null, string userId = null)
         {
             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
@@ -294,7 +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;
@@ -302,7 +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
@@ -319,6 +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;
@@ -328,7 +362,16 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                     _stateDirty = true;
                 }
             }
-            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
@@ -336,24 +379,29 @@ 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
                 // double-emit for the same execution.
                 try { OnScriptStarted?.Invoke(new ScriptStartedInfo { PolicyId = id, ScriptType = "platform" }); }
                 catch (Exception ex) { _logger.Warning($"ImeLogTracker: OnScriptStarted handler threw: {ex.Message}"); }
             }
-            RecordInvocationMarker(id, isClose: false);
+            RecordInvocationMarker(id, isClose: false, LastMatchedLogTimestamp.HasValue ? RunIdOfStartLine(slot, fromExecutor, currentStartTs) : slot.RunId);
             NoteInvocationActivity();
             // Started lines fire twice per script (agentexecutor + ime source) and carry no
             // outcome — the matching `platform script completed` line below carries result+exit
@@ -361,6 +409,34 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
             _logger.Debug($"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
@@ -439,6 +515,8 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                 ApplyExitCode(script, exitCode, LastMatchedLogTimestamp ?? UtcNowProvider(), CaptureLastMatchedProvenance());
             else if (ownerPolicyId != null)
                 _logger.Debug($"ImeLogTracker: exit code {exitCode} belongs to platform script {ownerPolicyId}, whose completion was already emitted — dropped");
+            else
+                LogLineBehindWriterBoundary($"exit code {exitCode}");
             // An exit code means the executor just wrote its end block and IME is about to
             // write the result — both land at a stale stream position when another process
             // appended meanwhile. Check the ledgers on the next pass.
@@ -465,17 +543,24 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         {
             var outputType = parameters != null && parameters.TryGetValue("outputType", out var ot) ? ot : null;
             var script = GetCurrentScriptForLineUpdate(parameters);
-            if (script == null) return;
+            if (script == null)
+            {
+                LogLineBehindWriterBoundary($"script output ({outputType ?? "combined"})");
+                return;
+            }
 
             // 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))
             {
@@ -507,7 +592,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
 
             if (string.IsNullOrEmpty(id)) return;
 
-            CompletePlatformScriptFromImeResult(id, result, LastMatchedLogTimestamp, LastMatchedPatternId, CaptureLastMatchedProvenance());
+            CompletePlatformScriptFromImeResult(id, result, LastMatchedLogTimestamp, LastMatchedPatternId, CaptureLastMatchedProvenance(), ImeUserIdFrom(match.Value));
         }
 
         /// <summary>
@@ -521,48 +606,46 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         /// line reopened the slot, produced a fallback duplicate (session e7f3c910).
         /// <see cref="FlushPendingPlatformScriptResults"/> emits the held completion.
         /// </summary>
-        internal void CompletePlatformScriptFromImeResult(string policyId, string result, DateTime? resultLineTimestampUtc, string patternId, CmTraceLineProvenance resultProvenance)
+        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"
+                    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();
@@ -591,19 +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 = NewRunId();
             EmitScriptEvent(script);
+            // 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.
@@ -641,29 +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)
@@ -682,10 +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;
             }
 
@@ -697,7 +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.
@@ -706,9 +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,
@@ -717,6 +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
@@ -755,7 +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;
@@ -877,7 +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
@@ -890,7 +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))
@@ -906,7 +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>
@@ -1163,11 +1398,11 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         internal static readonly TimeSpan HeldScriptStartGrace = TimeSpan.FromMinutes(30);
         internal static readonly TimeSpan HeldScriptStartShutdownGrace = TimeSpan.FromMinutes(5);
 
-        private static string TruncateOutput(string output)
+        internal static string TruncateOutput(string output)
         {
             if (string.IsNullOrEmpty(output) || output.Length <= MaxScriptOutputLength)
                 return output;
-            return output.Substring(0, MaxScriptOutputLength) + "...[truncated]";
+            return output.Substring(0, MaxScriptOutputLength) + OutputTruncationMarker;
         }
 
         // -----------------------------------------------------------------------

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

@@ -123,16 +123,19 @@ 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, and nothing below the old bookmark is fresh or a calibration anchor.
-            HashSet<LedgerEntry> rewoundEntries = null;
+            // 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);
 
             if (ledger != null)
             {
                 var rewindTo = await PrepareLedgerAsync(filePath, fileName, ledger, startPos, passNowUtc, token);
                 if (rewindTo >= 0)
                 {
-                    rewoundEntries = ApplyRewind(filePath, fileName, ledger, rewindTo, startPos);
+                    rewind = ApplyRewind(filePath, fileName, ledger, rewindTo, startPos);
                     oldBookmark = startPos;
                     startPos = rewindTo;
                 }
@@ -164,21 +167,21 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
             {
                 // Guard zone: the file grew and is open anyway — re-check the entries just behind
                 // the bookmark, where a stale writer's block lands when it is short.
-                if (ledger != null && rewoundEntries == null && ledger.Entries.Count > 0)
+                if (ledger != null && rewind == null && ledger.Entries.Count > 0)
                 {
                     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;
-                            rewoundEntries = ApplyRewind(filePath, fileName, ledger, divergence, startPos);
+                            rewind = ApplyRewind(filePath, fileName, ledger, divergence, startPos);
                             oldBookmark = startPos;
                             startPos = divergence;
                         }
@@ -259,7 +262,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                         // A fragment right at the bookmark of a multi-writer file (the previous
                         // entry ended exactly here, this one does not open an entry) is the tail of
                         // a block a stale writer laid over already-read bytes: verify before reading on.
-                        if (ledger != null && rewoundEntries == null && entry.Offset == ledger.EndOffset
+                        if (ledger != null && rewind == null && entry.Offset == ledger.EndOffset
                             && ledger.LastFragmentOffset != entry.Offset && !entry.Text.StartsWith("<![LOG["))
                         {
                             ledger.VerifyRequested = true;
@@ -269,11 +272,27 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                         }
                     }
 
-                    if (ledger != null) ledger.Record(entry);
-                    if (rewoundEntries != null && rewoundEntries.Contains(new LedgerEntry { Offset = entry.Offset, Hash = entry.Hash }))
-                        continue; // unchanged behind the old bookmark — processed before the rewind
+                    if (ledger != null) ledger.Record(entry, passNowUtc);
+                    var unchanged = rewind != null && rewind.IsUnchanged(entry);
+                    if (unchanged) RestoreInvocationMarkers(rewind, entry.Offset);
 
-                    _currentPassLinesAreFresh = passLinesAreFresh && entry.Offset >= oldBookmark;
+                    // Writer boundary (see ImeLogTracker.Overwrite.cs): an AgentExecutor.log entry that is
+                    // not exactly one CMTrace record ends the bytes of the executor in front of it. Never
+                    // matched — its text is the cut of two writers. Evaluated for unchanged entries too:
+                    // what owns the position in front of them may have changed with the rewind.
+                    if (writerBoundaries && !IsSingleCmTraceRecord(entry.Text))
+                    {
+                        CloseAtWriterBoundary(fileName, entry.Offset, entry.Text);
+                        continue;
+                    }
+
+                    if (unchanged) continue; // unchanged behind the old bookmark — processed before the rewind
+
+                    // 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;
@@ -863,11 +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))
@@ -288,18 +297,69 @@ 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);
                 }
             }
         }
 
-        /// <summary>Moves the bookmark back to the first changed entry; returns the entries to skip if they still read unchanged behind it.</summary>
-        private HashSet<LedgerEntry> ApplyRewind(string filePath, string fileName, FileLedger ledger, long rewindTo, long bookmark)
+        /// <summary>
+        /// What one rewind pass carries: the entries to skip if they still read unchanged behind the rewind point, and
+        /// the invocation markers set aside there until their entries prove unchanged. Pass-local by design — whatever
+        /// is not given back dies with the pass on every exit path.
+        /// </summary>
+        private sealed class RewindState
+        {
+            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; }
+            public HashSet<LedgerEntry> Unchanged { get; }
+            /// <summary>Set aside at the rewind, ascending by offset.</summary>
+            public List<InvocationMarker> Markers { get; }
+            /// <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)
         {
             var removed = ledger.TruncateFrom(rewindTo);
             _positionTracker.SetPosition(filePath, rewindTo);
             _heldTails.Remove(filePath);
-            InvalidateInvocationMarkersFrom(fileName, rewindTo);
+            var lastPlatformMarker = _lastPlatformMarker;
+            var markers = TakeInvocationMarkersFrom(fileName, rewindTo, out var tookLastPlatformMarker);
             _overwriteRewinds++;
             _overwriteBytesReprocessed += bookmark - rewindTo;
 
@@ -314,7 +374,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
             {
                 _logger.Debug(message);
             }
-            return removed;
+            return new RewindState(fileName, removed, markers, tookLastPlatformMarker ? lastPlatformMarker : null, rewindTo);
         }
 
         private long RetentionFloor(string fileName, long bookmark)
@@ -331,20 +391,44 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         // -----------------------------------------------------------------------
         //
         // AgentExecutor.log carries "Powershell exit code is N" / "write output done" without a
-        // policy id. Their owner is decided by FILE POSITION, not by the order lines were read:
-        // an executor writes its end block at its own stream position, i.e. directly after its
-        // own start block in the final bytes, so the nearest preceding invocation marker names
-        // it — and stays right after a rewind re-reads that region. A marker is a platform start
-        // (policy id), some other invocation (detection, remediation, requirement: null) or a
-        // close ("gets invoked" banner, "Agent executor completed").
+        // policy id. Their owner is decided by FILE POSITION: the nearest preceding marker — a
+        // platform start (policy id), some other invocation (detection, remediation, requirement:
+        // null), a close ("gets invoked" banner, "Agent executor completed") or a writer boundary.
+        //
+        // Every executor writes its lines contiguously from its own stream position, so its end
+        // block follows its own start block — but that start block may be gone. Two executors that
+        // open the file at the same end write their start blocks over each other, and the end block
+        // of the one that lost then sits behind the OTHER executor's start block (session 756970cf:
+        // a detection script's exit code and output on a platform script). Where one writer's bytes
+        // meet another's, the cut leaves an entry that is not exactly one CMTrace record — a
+        // fragment, a merged line or an empty line — unless the line boundaries of both writers
+        // coincide byte-exactly. That writer boundary closes the platform invocation in front of it.
+        // AgentExecutor.log only: in the IME log the service writes the markers and the lines they
+        // own itself, and its fragments are executor telemetry lines.
+        //
+        // A marker lives exactly as long as the bytes of its entry: a rewind sets the markers from
+        // the rewind point on aside, and an entry that reads unchanged gets its markers back.
 
         private sealed class InvocationMarker
         {
             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 =
             new Dictionary<string, List<InvocationMarker>>(StringComparer.OrdinalIgnoreCase);
         private InvocationMarker _lastPlatformMarker;
@@ -354,24 +438,62 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         private readonly HashSet<string> _platformMarkerFiles = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
         private long _testEntryOrdinal;
 
-        private void RecordInvocationMarker(string policyId, bool isClose)
+        /// <summary>
+        /// The executor log, live or rotated (<c>AgentExecutor-yyyyMMdd-HHmmss.log</c>): its invocations are one process
+        /// each, so a writer boundary ends an invocation — in the final bytes of a rotation as much as in the live file.
+        /// </summary>
+        internal static bool IsWriterBoundaryLogFile(string fileName)
+            => string.Equals(fileName, ExecutorLogFileName, StringComparison.OrdinalIgnoreCase)
+            || (fileName != null
+                && fileName.StartsWith("AgentExecutor-", StringComparison.OrdinalIgnoreCase)
+                && fileName.EndsWith(".log", StringComparison.OrdinalIgnoreCase));
+
+        /// <summary>
+        /// True when the entry is exactly one CMTrace record: it opens with <c>&lt;![LOG[</c> (culture-sensitive like
+        /// <c>CmTraceLogParser.TryParseLine</c>, so a BOM is ignorable) and holds no second one — the parser takes the
+        /// message up to the LAST trailer, so a line cut anywhere, its trailer included, would swallow the record
+        /// written over it. An empty entry is the terminator of a cut line. A script whose own output contains the
+        /// open tag loses that output line: the bytes cannot tell it from a merged line.
+        /// </summary>
+        internal static bool IsSingleCmTraceRecord(string text)
+        {
+            if (string.IsNullOrEmpty(text) || !text.StartsWith(LogOpenTag)) return false;
+            var first = text.IndexOf(LogOpenTag, StringComparison.Ordinal);
+            return first >= 0 && text.IndexOf(LogOpenTag, first + LogOpenTag.Length, StringComparison.Ordinal) < 0;
+        }
+
+        private List<InvocationMarker> GetOrCreateMarkerList(string file)
         {
-            if (_currentEntryOffset < 0) return;
-            var file = _currentSourceFileName ?? TestSourceFileName;
             List<InvocationMarker> list;
             if (!_invocationMarkers.TryGetValue(file, out list))
             {
                 list = new List<InvocationMarker>();
                 _invocationMarkers[file] = list;
             }
+            return list;
+        }
+
+        private static void AppendInvocationMarker(List<InvocationMarker> list, InvocationMarker marker)
+        {
+            if (list.Count >= MaxInvocationMarkersPerFile) list.RemoveAt(0);
+            list.Add(marker);
+        }
+
+        private void RecordInvocationMarker(string policyId, bool isClose, string runId = null)
+        {
+            if (_currentEntryOffset < 0) return;
+            var file = _currentSourceFileName ?? TestSourceFileName;
+            var list = GetOrCreateMarkerList(file);
 
             if (list.Count > 0 && list[list.Count - 1].Offset == _currentEntryOffset)
             {
                 // Two patterns on one line: the platform start outranks the generic argument line.
+                // A writer boundary is never upgraded.
                 var last = list[list.Count - 1];
-                if (!isClose && policyId != null)
+                if (!isClose && policyId != null && last.ClosedPolicyId == null)
                 {
                     last.PolicyId = policyId;
+                    last.RunId = runId;
                     last.IsClose = false;
                     _lastPlatformMarker = last;
                     _platformMarkerFiles.Add(file);
@@ -379,9 +501,8 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                 return;
             }
 
-            if (list.Count >= MaxInvocationMarkersPerFile) list.RemoveAt(0);
-            var marker = new InvocationMarker { Offset = _currentEntryOffset, PolicyId = policyId, IsClose = isClose };
-            list.Add(marker);
+            var marker = new InvocationMarker { Offset = _currentEntryOffset, PolicyId = policyId, RunId = runId, IsClose = isClose };
+            AppendInvocationMarker(list, marker);
             if (!isClose && policyId != null)
             {
                 _lastPlatformMarker = marker;
@@ -390,21 +511,34 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         }
 
         /// <summary>
-        /// The pending platform script that owns the entry being processed, or null.
-        /// <paramref name="ownerPolicyId"/> names the owning platform script even when its slot is
-        /// gone (completion already emitted); null when no platform invocation owns the entry.
+        /// An entry of <paramref name="fileName"/> at <paramref name="offset"/> that is not exactly one CMTrace record:
+        /// the bytes behind it were written by another process than the bytes in front of it. Closes the platform
+        /// invocation that owns the position; records nothing when none is open there (a cut multi-line output yields
+        /// one fragment per line). Idempotent at the same offset.
         /// </summary>
-        private ScriptExecutionState ResolvePlatformScriptForCurrentEntry(out string ownerPolicyId)
+        private void CloseAtWriterBoundary(string fileName, long offset, string text)
+        {
+            var owner = FindOwningMarker(fileName, offset);
+            if (owner == null || owner.IsClose || owner.PolicyId == null) return;
+
+            var list = GetOrCreateMarkerList(fileName);
+            if (list.Count > 0 && list[list.Count - 1].Offset >= offset) return;
+            AppendInvocationMarker(list, new InvocationMarker { Offset = offset, IsClose = true, ClosedPolicyId = owner.PolicyId });
+
+            var kind = string.IsNullOrEmpty(text) ? "empty line" : text.StartsWith(LogOpenTag) ? "merged line" : "fragment";
+            _logger.Debug($"ImeLogTracker: writer boundary in {fileName} at offset {offset} ({kind}, {text?.Length ?? 0} chars) closes platform script {owner.PolicyId} (opened at {owner.Offset}) — the bytes behind it belong to another executor");
+        }
+
+        /// <summary>The marker that owns <paramref name="offset"/> in <paramref name="file"/>, or null.</summary>
+        private InvocationMarker FindOwningMarker(string file, long offset)
         {
-            ownerPolicyId = null;
-            var file = _currentSourceFileName ?? TestSourceFileName;
             InvocationMarker marker = null;
             List<InvocationMarker> list = null;
-            if (_currentEntryOffset >= 0 && _invocationMarkers.TryGetValue(file, out list))
+            if (offset >= 0 && _invocationMarkers.TryGetValue(file, out list))
             {
                 for (var i = list.Count - 1; i >= 0; i--)
                 {
-                    if (list[i].Offset <= _currentEntryOffset)
+                    if (list[i].Offset <= offset)
                     {
                         marker = list[i];
                         break;
@@ -420,24 +554,52 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
             // (session 24dc69d1: the health-script worker's exit line pre-filled a platform slot's
             // exit code, its launch line the slot's context).
             if (marker == null && (list == null || list.Count == 0) && _platformMarkerFiles.Contains(file)) marker = _lastPlatformMarker;
+            return marker;
+        }
+
+        /// <summary>
+        /// The pending platform script that owns the entry being processed, or null.
+        /// <paramref name="ownerPolicyId"/> names the owning platform script even when its slot is
+        /// gone (completion already emitted); null when no platform invocation owns the entry.
+        /// </summary>
+        private ScriptExecutionState ResolvePlatformScriptForCurrentEntry(out string ownerPolicyId)
+        {
+            ownerPolicyId = null;
+            var marker = FindOwningMarker(_currentSourceFileName ?? TestSourceFileName, _currentEntryOffset);
             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;
         }
 
-        private void InvalidateInvocationMarkersFrom(string fileName, long offset)
+        /// <summary>Debug trace for an executor line that a writer boundary kept away from a platform script.</summary>
+        private void LogLineBehindWriterBoundary(string what)
         {
+            var marker = FindOwningMarker(_currentSourceFileName ?? TestSourceFileName, _currentEntryOffset);
+            if (marker?.ClosedPolicyId == null) return;
+            _logger.Debug($"ImeLogTracker: {what} at offset {_currentEntryOffset} lies behind the writer boundary at {marker.Offset} that closed platform script {marker.ClosedPolicyId} — another executor's end block, not attributed");
+        }
+
+        /// <summary>Removes the markers from <paramref name="offset"/> on and returns them in offset order.</summary>
+        private List<InvocationMarker> TakeInvocationMarkersFrom(string fileName, long offset, out bool tookLastPlatformMarker)
+        {
+            tookLastPlatformMarker = false;
+            var taken = new List<InvocationMarker>();
             List<InvocationMarker> list;
-            if (!_invocationMarkers.TryGetValue(fileName, out list) || list.Count == 0) return;
-            var removedLast = false;
-            for (var i = list.Count - 1; i >= 0 && list[i].Offset >= offset; i--)
+            if (!_invocationMarkers.TryGetValue(fileName, out list) || list.Count == 0) return taken;
+
+            var from = list.Count;
+            while (from > 0 && list[from - 1].Offset >= offset) from--;
+            for (var i = from; i < list.Count; i++)
             {
-                if (ReferenceEquals(list[i], _lastPlatformMarker)) removedLast = true;
-                list.RemoveAt(i);
+                if (ReferenceEquals(list[i], _lastPlatformMarker)) tookLastPlatformMarker = true;
+                taken.Add(list[i]);
             }
-            if (removedLast)
+            list.RemoveRange(from, list.Count - from);
+
+            if (tookLastPlatformMarker)
             {
                 _lastPlatformMarker = null;
                 for (var i = list.Count - 1; i >= 0; i--)
@@ -449,6 +611,28 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                     }
                 }
             }
+            return taken;
+        }
+
+        private void InvalidateInvocationMarkersFrom(string fileName, long offset) => TakeInvocationMarkersFrom(fileName, offset, out _);
+
+        /// <summary>
+        /// An entry that reads unchanged after a rewind keeps its markers: gives back the set-aside markers at exactly
+        /// <paramref name="entryOffset"/>. Set-aside markers in front of it belonged to entries that changed and stay
+        /// gone with their bytes.
+        /// </summary>
+        private void RestoreInvocationMarkers(RewindState rewind, long entryOffset)
+        {
+            var markers = rewind.Markers;
+            while (rewind.Next < markers.Count && markers[rewind.Next].Offset < entryOffset) rewind.Next++;
+            while (rewind.Next < markers.Count && markers[rewind.Next].Offset == entryOffset)
+            {
+                var marker = markers[rewind.Next++];
+                var list = GetOrCreateMarkerList(rewind.FileName);
+                if (list.Count > 0 && list[list.Count - 1].Offset >= marker.Offset) continue;
+                AppendInvocationMarker(list, marker);
+                if (ReferenceEquals(marker, rewind.LastPlatformMarker)) _lastPlatformMarker = marker;
+            }
         }
 
         private long OldestPendingScriptMarkerOffset(string fileName)
@@ -474,6 +658,9 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         /// <summary>What a rollover of the file does to its invocation markers.</summary>
         internal void ClearInvocationMarkersForTest(string fileName) => InvalidateInvocationMarkersFrom(fileName, 0);
 
+        internal int InvocationMarkerCountForTest(string fileName)
+            => _invocationMarkers.TryGetValue(fileName, out var list) ? list.Count : 0;
+
         internal int LedgerEntryCountForTest(string fileName)
         {
             FileLedger ledger;

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

@@ -182,6 +182,19 @@ 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.
+        /// </summary>
+        internal PlatformScriptRunRegister ScriptRuns { get; } = new PlatformScriptRunRegister();
+
         // Health-script (remediation) line-by-line accumulator — single slot because IME
         // executes health scripts SEQUENTIALLY within a session (verified across multiple
         // diagnostic captures: ProcessScript → context → exit → stdout → stderr → compliance,
@@ -240,7 +253,8 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         // the 32K-char Table Storage property limit that bounds the event downstream. Growth
         // driver is the number of log lines the bootstrap chain writes, so re-measure before
         // adding a chatty step rather than raising this again.
-        private const int MaxScriptOutputLength = 8192;
+        internal const int MaxScriptOutputLength = 8192;
+        internal const string OutputTruncationMarker = "...[truncated]";
         private const int MaxMultiLineBufferLines = 100;
         // Size cap for ONE entry — a single physical line (enforced by BoundedLineReader before
         // the line is materialized) and an assembled multiline entry alike. Any process able to
@@ -389,6 +403,8 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                     VerifiedBytes = _verifiedBytes,
                     PassMaxMs = _passMaxMs,
                     PassGapMaxMs = _passGapMaxMs,
+                    PlatformOutputVerified = ScriptRuns.Verified,
+                    PlatformOutputCorrected = ScriptRuns.Corrected,
                     PatternHits = new Dictionary<string, int>(_patternHits, StringComparer.OrdinalIgnoreCase),
                 };
             }
@@ -1034,6 +1050,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         internal async Task RunPollPassAsync(CancellationToken token)
         {
             var startMs = MonotonicMillisProvider();
+            var passStartedUtc = UtcNowProvider();
             if (_lastPassEndMs >= 0 && startMs - _lastPassEndMs > _passGapMaxMs)
             {
                 _passGapMaxMs = startMs - _lastPassEndMs;
@@ -1045,6 +1062,12 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
             FlushRecurringScripts(UtcNowProvider(), shuttingDown: false);
             CheckPendingTokenFailure(UtcNowProvider());
 
+            // The lines written before this pass started are read now — a held tail or a fragment
+            // awaiting its check follows a pass or two later, which TrackerCatchUp covers. The
+            // registry reconciliation waits for such a pass before it pairs an IME save with a run.
+            if (!token.IsCancellationRequested) ScriptRuns.NotePassCompleted(passStartedUtc);
+            if (ScriptRuns.ConsumeCountersChanged()) _stateDirty = true;
+
             var endMs = MonotonicMillisProvider();
             if (endMs - startMs > _passMaxMs)
             {
@@ -1175,6 +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)
             {
@@ -1207,6 +1240,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                     _verifiedBytes = state.Health.VerifiedBytes;
                     _passMaxMs = state.Health.PassMaxMs;
                     _passGapMaxMs = state.Health.PassGapMaxMs;
+                    ScriptRuns.RestoreCounters(state.Health.PlatformOutputVerified, state.Health.PlatformOutputCorrected);
                 }
                 if (state.PatternHits != null)
                 {
@@ -1259,6 +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(),
             };
@@ -1283,6 +1318,8 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
                     VerifiedBytes = _verifiedBytes,
                     PassMaxMs = _passMaxMs,
                     PassGapMaxMs = _passGapMaxMs,
+                    PlatformOutputVerified = ScriptRuns.Verified,
+                    PlatformOutputCorrected = ScriptRuns.Corrected,
                 };
                 state.PatternHits = new Dictionary<string, int>(_patternHits, StringComparer.OrdinalIgnoreCase);
             }

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

@@ -81,6 +81,16 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         /// </summary>
         public long PassGapMaxMs { get; set; }
 
+        /// <summary>
+        /// Platform-script runs whose emitted output IME's saved result (registry, after the batch
+        /// report) confirmed — the exit code of the same end block with it. Together with
+        /// <see cref="PlatformOutputCorrected"/> the field measure of the registry reconciliation (D-316).
+        /// </summary>
+        public long PlatformOutputVerified { get; set; }
+
+        /// <summary>Platform-script runs whose emitted output IME's saved result corrected (script_output_reconciliation).</summary>
+        public long PlatformOutputCorrected { get; set; }
+
         /// <summary>Match count per enabled pattern ID — every enabled pattern is present, zeros included.</summary>
         public IReadOnlyDictionary<string, int> PatternHits { get; set; }
 

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
@@ -185,6 +189,9 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
         // Poll-loop timing maxima (null-defaulting on older state files).
         public long PassMaxMs { get; set; }
         public long PassGapMaxMs { get; set; }
+        // Registry reconciliation of platform-script output (null-defaulting on older state files).
+        public long PlatformOutputVerified { get; set; }
+        public long PlatformOutputCorrected { get; set; }
     }
 
     public class PackageStateData

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

@@ -0,0 +1,196 @@
+using System;
+using System.Collections.Generic;
+
+namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime
+{
+    /// <summary>What the registry reconciliation may do with a saved IME result right now.</summary>
+    internal enum PlatformRunClaim
+    {
+        /// <summary>The run is handed out for reconciliation; it is never handed out again.</summary>
+        Claimed,
+        /// <summary>Not decidable yet: the tracker has not read past the save, or the run is not emitted yet.</summary>
+        Wait,
+        /// <summary>No run of this agent owns the save (none seen, or already reconciled).</summary>
+        None,
+    }
+
+    /// <summary>One platform-script run as the tracker emitted it; the register hands out copies.</summary>
+    internal sealed class PlatformScriptRun
+    {
+        public string PolicyId;
+        public string UserId;
+        public string RunId;
+        public DateTime StartSeenUtc;
+        public bool Emitted;
+        public bool Claimed;
+        public string Result;
+        public string ResultSource;
+        public int? ExitCode;
+        /// <summary>As emitted: null when no output line of the run was read, empty when it said so.</summary>
+        public string Stdout;
+        public string Stderr;
+
+        public PlatformScriptRun Clone() => (PlatformScriptRun)MemberwiseClone();
+    }
+
+    /// <summary>
+    /// The platform-script runs the tracker has seen, the latest per (IME user id, policy id), for the
+    /// registry reconciliation (D-316). IME saves a run's output under
+    /// <c>Policies\&lt;UserId&gt;\&lt;PolicyId&gt;</c> only after it reported the whole script batch, so the
+    /// observer reading it must know which run a changed key belongs to and what was emitted for it.
+    /// 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 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>
+    /// </summary>
+    internal sealed class PlatformScriptRunRegister
+    {
+        /// <summary>
+        /// How far behind a seen save the tracker must have started a completed pass before the save
+        /// is paired; covers the ledger's verify cadence (1 s) for a start line hidden by an overwrite.
+        /// </summary>
+        internal static readonly TimeSpan TrackerCatchUp = TimeSpan.FromSeconds(2);
+
+        internal const int MaxRuns = 256;
+
+        private readonly object _sync = new object();
+        private readonly Dictionary<string, PlatformScriptRun> _latest =
+            new Dictionary<string, PlatformScriptRun>(StringComparer.OrdinalIgnoreCase);
+        private DateTime _lastCompletedPassStartUtc = DateTime.MinValue;
+        private long _verified;
+        private long _corrected;
+        private bool _countersChanged;
+
+        private static string KeyOf(string userId, string policyId) => (userId ?? string.Empty) + "|" + policyId;
+
+        /// <summary>A platform run began: its start line, or its result when no start line was seen.</summary>
+        public void NoteStarted(string userId, string policyId, DateTime seenUtc)
+        {
+            if (string.IsNullOrEmpty(policyId)) return;
+            lock (_sync)
+            {
+                _latest[KeyOf(userId, policyId)] = new PlatformScriptRun { PolicyId = policyId, UserId = userId, StartSeenUtc = seenUtc };
+                TrimLocked();
+            }
+        }
+
+        /// <summary>The tracker emitted the run with these end-block values.</summary>
+        public void NoteEmitted(ScriptExecutionState script, DateTime emittedUtc)
+        {
+            if (script == null || string.IsNullOrEmpty(script.PolicyId)) return;
+            lock (_sync)
+            {
+                var key = KeyOf(script.UserId, script.PolicyId);
+                if (!_latest.TryGetValue(key, out var run) || run.Emitted)
+                {
+                    run = new PlatformScriptRun { PolicyId = script.PolicyId, UserId = script.UserId, StartSeenUtc = emittedUtc };
+                    _latest[key] = run;
+                }
+                run.Emitted = true;
+                run.RunId = script.RunId;
+                run.Result = script.Result;
+                run.ResultSource = script.ResultSource;
+                run.ExitCode = script.ExitCode;
+                run.Stdout = script.Stdout;
+                run.Stderr = script.Stderr;
+                TrimLocked();
+            }
+        }
+
+        /// <summary>The tracker finished a poll pass that started at <paramref name="passStartedUtc"/>.</summary>
+        public void NotePassCompleted(DateTime passStartedUtc)
+        {
+            lock (_sync)
+            {
+                if (passStartedUtc > _lastCompletedPassStartUtc) _lastCompletedPassStartUtc = passStartedUtc;
+            }
+        }
+
+        /// <summary>
+        /// Hands out the run a save of (<paramref name="userId"/>, <paramref name="policyId"/>) seen at
+        /// <paramref name="savedSeenUtc"/> belongs to — once. A run whose user id the tracker could not
+        /// read is keyed without one.
+        /// </summary>
+        public PlatformRunClaim TryClaim(string userId, string policyId, DateTime savedSeenUtc, out PlatformScriptRun run)
+        {
+            run = null;
+            lock (_sync)
+            {
+                if (_lastCompletedPassStartUtc < savedSeenUtc + TrackerCatchUp) return PlatformRunClaim.Wait;
+
+                if (!_latest.TryGetValue(KeyOf(userId, policyId), out var latest)
+                    && !_latest.TryGetValue(KeyOf(null, policyId), out latest))
+                    return PlatformRunClaim.None;
+                if (latest.Claimed) return PlatformRunClaim.None;
+                if (!latest.Emitted) return PlatformRunClaim.Wait;
+
+                latest.Claimed = true;
+                run = latest.Clone();
+                return PlatformRunClaim.Claimed;
+            }
+        }
+
+        public void CountVerified()
+        {
+            lock (_sync) { _verified++; _countersChanged = true; }
+        }
+
+        public void CountCorrected()
+        {
+            lock (_sync) { _corrected++; _countersChanged = true; }
+        }
+
+        /// <summary>Runs whose emitted output IME's saved result confirmed (restart-safe, session-cumulative).</summary>
+        public long Verified { get { lock (_sync) return _verified; } }
+
+        /// <summary>Runs whose emitted output IME's saved result corrected (restart-safe, session-cumulative).</summary>
+        public long Corrected { get { lock (_sync) return _corrected; } }
+
+        public void RestoreCounters(long verified, long corrected)
+        {
+            lock (_sync)
+            {
+                _verified = verified;
+                _corrected = corrected;
+            }
+        }
+
+        /// <summary>True once after a counter moved — the tracker then persists its state.</summary>
+        public bool ConsumeCountersChanged()
+        {
+            lock (_sync)
+            {
+                var changed = _countersChanged;
+                _countersChanged = false;
+                return changed;
+            }
+        }
+
+        private void TrimLocked()
+        {
+            while (_latest.Count > MaxRuns)
+            {
+                string oldestKey = null;
+                var oldest = DateTime.MaxValue;
+                foreach (var kv in _latest)
+                {
+                    if (kv.Value.StartSeenUtc < oldest)
+                    {
+                        oldest = kv.Value.StartSeenUtc;
+                        oldestKey = kv.Key;
+                    }
+                }
+                if (oldestKey == null) return;
+                _latest.Remove(oldestKey);
+            }
+        }
+    }
+}

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

@@ -15,6 +15,28 @@ public class ScriptExecutionState
     /// <summary>"platform" or "remediation".</summary>
     public string ScriptType { get; set; }
 
+    /// <summary>
+    /// IME user id a platform script ran for (the all-zero GUID in device context), read from its
+    /// script path or its result line. Keys IME's saved result
+    /// (<c>Policies\&lt;UserId&gt;\&lt;PolicyId&gt;</c>) that the registry reconciliation compares against.
+    /// </summary>
+    public string UserId { get; set; }
+
+    /// <summary>
+    /// 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>
@@ -413,7 +420,8 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
                 _tenantId,
                 _post,
                 _logger,
-                _helloTracker);
+                _helloTracker,
+                stateDirectory: _stateDirectory);
             _shellCoreTracker.FinalizingSetupPhaseTriggered += OnFinalizingSetupPhaseTriggered;
             _shellCoreTracker.WhiteGloveCompleted += OnWhiteGloveCompleted;
             _shellCoreTracker.EspFailureDetected += OnShellCoreEspFailureDetected;

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

@@ -0,0 +1,401 @@
+#nullable enable
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text.Json;
+using AutopilotMonitor.Agent.V2.Core.Logging;
+using AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.Ime;
+using AutopilotMonitor.Agent.V2.Core.Orchestration;
+using AutopilotMonitor.DecisionCore.Engine;
+using AutopilotMonitor.Shared.Models;
+using Microsoft.Win32;
+using SharedEventTypes = AutopilotMonitor.Shared.Constants.EventTypes;
+
+namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
+{
+    /// <summary>
+    /// Registry second pillar for platform scripts (D-316). After IME reported a script batch to
+    /// Intune it saves every run of the batch under
+    /// <c>HKLM\SOFTWARE\Microsoft\IntuneManagementExtension\Policies\&lt;UserId&gt;\&lt;PolicyId&gt;</c>:
+    /// <c>Result</c>, <c>ErrorCode</c> and <c>ResultDetails</c>, whose <c>ExecutionMsg</c> is what IME read
+    /// from the result file of exactly that policy — the stdout when the run succeeded (IME's Success
+    /// means an empty stderr file, whatever the exit code), the stderr when it failed with ErrorCode 99.
+    /// The log tracker assigns a run's exit code and output by file position in AgentExecutor.log, where
+    /// no policy id anchors them; this observer checks what was emitted against the keyed value and
+    /// emits <c>script_output_reconciliation</c> when they disagree.
+    /// <para>
+    /// Snapshot-and-diff like <see cref="ImeRegistryAppStateObserver"/>, ticked by the same host: the
+    /// first tick is the silent baseline, a later save is paired with its run through
+    /// <see cref="PlatformScriptRunRegister"/>. No exit code lives in the registry: a run whose output
+    /// matches proves the exit code of the same end block; a contradicted run loses its exit code.
+    /// </para>
+    /// </summary>
+    internal sealed class ImeRegistryScriptResultObserver
+    {
+        public const string SourceLabel = "RegistryScriptResult";
+
+        internal const string PoliciesKeyPath = ImeRegistryAppStateObserver.ImeRootKeyPath + @"\Policies";
+
+        /// <summary>A save whose run never became claimable is dropped after this long (send failure of a later batch, agent restart).</summary>
+        internal static readonly TimeSpan PendingExpiry = TimeSpan.FromMinutes(10);
+
+        /// <summary>Safety cap on correction events per agent run; corrections beyond it are counted only.</summary>
+        internal const int MaxCorrectionsPerSession = 100;
+
+        private readonly PlatformScriptRunRegister _runs;
+        private readonly Func<IReadOnlyDictionary<string, SavedScriptResult>> _snapshotSource;
+        private readonly InformationalEventPost _post;
+        private readonly AgentLogger? _logger;
+        private readonly IClock _clock;
+        private readonly object _sync = new object();
+
+        private IReadOnlyDictionary<string, SavedScriptResult>? _last;
+        private readonly Dictionary<string, (SavedScriptResult Saved, DateTime SeenUtc)> _pending =
+            new Dictionary<string, (SavedScriptResult, DateTime)>(StringComparer.OrdinalIgnoreCase);
+        private int _correctionsEmitted;
+
+        /// <param name="snapshotSource">Replaces the live registry walk in tests; per instance, so parallel test classes never share it.</param>
+        public ImeRegistryScriptResultObserver(
+            PlatformScriptRunRegister runs,
+            InformationalEventPost post,
+            AgentLogger? logger,
+            IClock clock,
+            Func<IReadOnlyDictionary<string, SavedScriptResult>>? snapshotSource = null)
+        {
+            _runs = runs ?? throw new ArgumentNullException(nameof(runs));
+            _post = post ?? throw new ArgumentNullException(nameof(post));
+            _clock = clock ?? throw new ArgumentNullException(nameof(clock));
+            _logger = logger;
+            _snapshotSource = snapshotSource ?? ReadSnapshot;
+        }
+
+        /// <summary>One observation pass: snapshot → new saves → pair → judge → correct. Fail-soft: never throws.</summary>
+        public void Tick(string reason)
+        {
+            try
+            {
+                lock (_sync)
+                {
+                    var snapshot = _snapshotSource();
+                    var nowUtc = _clock.UtcNow;
+
+                    if (_last == null)
+                    {
+                        // Saves that predate this agent run belong to runs it never emitted.
+                        _last = snapshot;
+                        _logger?.Info($"RegistryScriptResult: baseline captured ({snapshot.Count} saved platform-script results, trigger={reason})");
+                        return;
+                    }
+
+                    foreach (var kv in snapshot)
+                    {
+                        if (_last.TryGetValue(kv.Key, out var previous) && previous.SameSaveAs(kv.Value)) continue;
+                        _pending[kv.Key] = (kv.Value, nowUtc); // a newer save of the key replaces a waiting one
+                    }
+                    _last = snapshot;
+
+                    ProcessPending(nowUtc);
+                }
+            }
+            catch (Exception ex)
+            {
+                _logger?.Debug($"RegistryScriptResult: tick failed (fail-soft): {ex.Message}");
+            }
+        }
+
+        private void ProcessPending(DateTime nowUtc)
+        {
+            foreach (var key in _pending.Keys.ToList())
+            {
+                var (saved, seenUtc) = _pending[key];
+                var claim = _runs.TryClaim(saved.UserId, saved.PolicyId, seenUtc, out var run);
+                if (claim == PlatformRunClaim.Wait)
+                {
+                    if (nowUtc - seenUtc >= PendingExpiry) _pending.Remove(key);
+                    continue;
+                }
+
+                _pending.Remove(key);
+                if (claim == PlatformRunClaim.Claimed && run != null) Reconcile(run, saved, nowUtc);
+            }
+        }
+
+        private void Reconcile(PlatformScriptRun run, SavedScriptResult saved, DateTime nowUtc)
+        {
+            var judgement = PlatformOutputJudge.Judge(run, saved);
+            switch (judgement.Verdict)
+            {
+                case PlatformOutputVerdict.Verified:
+                    _runs.CountVerified();
+                    _logger?.Debug($"RegistryScriptResult: platform script {run.PolicyId} output confirmed by IME's saved result");
+                    return;
+                case PlatformOutputVerdict.NotComparable:
+                    _logger?.Debug($"RegistryScriptResult: platform script {run.PolicyId} not comparable ({judgement.Reason})");
+                    return;
+            }
+
+            _runs.CountCorrected();
+            if (_correctionsEmitted >= MaxCorrectionsPerSession)
+            {
+                _logger?.Warning($"RegistryScriptResult: correction for {run.PolicyId} not emitted — cap of {MaxCorrectionsPerSession} per agent run reached");
+                return;
+            }
+            _correctionsEmitted++;
+
+            var foreign = judgement.Verdict == PlatformOutputVerdict.Foreign;
+            var culture = CultureInfo.InvariantCulture;
+            var data = new Dictionary<string, string>(StringComparer.Ordinal)
+            {
+                ["policyId"] = run.PolicyId,
+                ["scriptType"] = "platform",
+                ["outcome"] = foreign ? "foreign" : "repaired",
+                ["reason"] = judgement.Reason,
+            };
+            if (!string.IsNullOrEmpty(run.RunId)) data["runId"] = run.RunId!;
+            if (!string.IsNullOrEmpty(saved.Result)) data["result"] = saved.Result!;
+            if (saved.ErrorCode.HasValue) data["registryErrorCode"] = saved.ErrorCode.Value.ToString(culture);
+            // A present key replaces the emitted value, an empty one clears it; an absent key keeps it.
+            if (judgement.Stdout != null) data["stdout"] = judgement.Stdout;
+            if (judgement.Stderr != null) data["stderr"] = judgement.Stderr;
+            if (foreign && run.ExitCode.HasValue) data["previousExitCode"] = run.ExitCode.Value.ToString(culture);
+
+            var shortId = run.PolicyId.Length > 8 ? run.PolicyId.Substring(0, 8) : run.PolicyId;
+            var message = foreign
+                ? $"Platform script {shortId}: output corrected from IME's saved result; the log had attributed another script's output, exit code unverified"
+                : $"Platform script {shortId}: output completed from IME's saved result";
+
+            _post.Emit(
+                eventType: SharedEventTypes.ScriptOutputReconciliation,
+                source: SourceLabel,
+                message: message,
+                severity: foreign ? EventSeverity.Warning : EventSeverity.Info,
+                immediateUpload: foreign,
+                data: data,
+                occurredAtUtc: nowUtc);
+
+            if (foreign)
+                _logger?.Warning($"RegistryScriptResult: platform script {run.PolicyId} run {run.RunId} carried another script's end block ({judgement.Reason}) — corrected from IME's saved result");
+            else
+                _logger?.Info($"RegistryScriptResult: platform script {run.PolicyId} run {run.RunId} output completed from IME's saved result ({judgement.Reason})");
+        }
+
+        // ── snapshot ────────────────────────────────────────────────────────────
+
+        internal static string KeyOf(string userId, string policyId) => userId + "|" + policyId;
+
+        internal static IReadOnlyDictionary<string, SavedScriptResult> ReadSnapshot()
+        {
+            var snapshot = new Dictionary<string, SavedScriptResult>(StringComparer.OrdinalIgnoreCase);
+            using var baseKey = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry64);
+            using var policies = baseKey.OpenSubKey(PoliciesKeyPath);
+            if (policies == null) return snapshot;
+
+            foreach (var userId in policies.GetSubKeyNames())
+            {
+                if (!Guid.TryParse(userId, out _)) continue;
+                using var userKey = policies.OpenSubKey(userId);
+                if (userKey == null) continue;
+
+                foreach (var policyId in userKey.GetSubKeyNames())
+                {
+                    if (!Guid.TryParse(policyId, out _)) continue;
+                    using var policyKey = userKey.OpenSubKey(policyId);
+                    if (policyKey == null) continue;
+
+                    snapshot[KeyOf(userId, policyId)] = new SavedScriptResult
+                    {
+                        UserId = userId,
+                        PolicyId = policyId,
+                        Result = policyKey.GetValue("Result") as string,
+                        ErrorCode = TryReadInt(policyKey.GetValue("ErrorCode")),
+                        ResultDetails = policyKey.GetValue("ResultDetails") as string,
+                        LastUpdatedTimeUtc = policyKey.GetValue("LastUpdatedTimeUtc") as string,
+                    };
+                }
+            }
+            return snapshot;
+        }
+
+        private static int? TryReadInt(object? value)
+        {
+            switch (value)
+            {
+                case int i: return i;
+                case long l when l >= int.MinValue && l <= int.MaxValue: return (int)l;
+                case string s when int.TryParse(s, NumberStyles.Integer, CultureInfo.InvariantCulture, out var parsed): return parsed;
+                default: return null;
+            }
+        }
+    }
+
+    /// <summary>One platform-script result as IME saved it under <c>Policies\&lt;UserId&gt;\&lt;PolicyId&gt;</c>.</summary>
+    internal sealed class SavedScriptResult
+    {
+        public string UserId { get; set; } = string.Empty;
+        public string PolicyId { get; set; } = string.Empty;
+        public string? Result { get; set; }
+        public int? ErrorCode { get; set; }
+        public string? ResultDetails { get; set; }
+        public string? LastUpdatedTimeUtc { get; set; }
+
+        /// <summary>The same save: IME stamps every save with a new <c>LastUpdatedTimeUtc</c>.</summary>
+        public bool SameSaveAs(SavedScriptResult other)
+            => string.Equals(LastUpdatedTimeUtc, other.LastUpdatedTimeUtc, StringComparison.Ordinal)
+            && string.Equals(Result, other.Result, StringComparison.Ordinal)
+            && ErrorCode == other.ErrorCode
+            && string.Equals(ResultDetails, other.ResultDetails, StringComparison.Ordinal);
+
+        /// <summary>
+        /// <c>ExecutionMsg</c> of the CryptoResult JSON in <c>ResultDetails</c> (IME 1.73 and later), or null
+        /// when the value is not that JSON ("Hash mismatch", a launch failure).
+        /// </summary>
+        public string? ExecutionMessage()
+        {
+            if (string.IsNullOrWhiteSpace(ResultDetails)) return null;
+            try
+            {
+                using var doc = JsonDocument.Parse(ResultDetails!);
+                if (doc.RootElement.ValueKind != JsonValueKind.Object) return null;
+                return doc.RootElement.TryGetProperty("ExecutionMsg", out var msg) && msg.ValueKind == JsonValueKind.String
+                    ? msg.GetString()
+                    : null;
+            }
+            catch (JsonException)
+            {
+                return null;
+            }
+        }
+    }
+
+    internal enum PlatformOutputVerdict
+    {
+        /// <summary>IME's saved result cannot confirm or contradict the run (no output saved, other failure kind).</summary>
+        NotComparable,
+        /// <summary>The emitted output is what IME saved: the end block, its exit code included, is the run's own.</summary>
+        Verified,
+        /// <summary>The log delivered the run's output incomplete; IME's saved text completes it, the exit code stands.</summary>
+        Repaired,
+        /// <summary>The emitted output contradicts IME's saved result: the end block was another executor's.</summary>
+        Foreign,
+    }
+
+    internal sealed class PlatformOutputJudgement
+    {
+        public PlatformOutputVerdict Verdict { get; set; }
+        public string Reason { get; set; } = string.Empty;
+        /// <summary>Value to publish (Repaired/Foreign): null keeps the emitted stdout, empty clears it.</summary>
+        public string? Stdout { get; set; }
+        /// <summary>Value to publish (Repaired/Foreign): null keeps the emitted stderr, empty clears it.</summary>
+        public string? Stderr { get; set; }
+    }
+
+    /// <summary>
+    /// Compares a platform-script run as the tracker emitted it with IME's saved result. Comparable are
+    /// a Success (ExecutionMsg = stdout; IME's Success means the stderr file was empty) and a Failed with
+    /// ErrorCode 99 (ExecutionMsg = stderr). Both texts are compared after CR/LF normalisation and Trim;
+    /// the tracker's own 8192-character cut is a prefix of the saved text.
+    /// </summary>
+    internal static class PlatformOutputJudge
+    {
+        internal const int ImeStderrErrorCode = 99;
+        private const string OutputErrorSeparator = ", error =";
+
+        public static PlatformOutputJudgement Judge(PlatformScriptRun run, SavedScriptResult saved)
+        {
+            var executionMessage = saved.ExecutionMessage();
+            if (executionMessage == null) return NotComparable("no_execution_message");
+
+            // The run's IME result line and the save come from the same IME run.
+            if (string.Equals(run.ResultSource, "ime_policy_result", StringComparison.Ordinal)
+                && !string.Equals(run.Result, saved.Result, StringComparison.OrdinalIgnoreCase))
+                return NotComparable("result_differs");
+
+            if (string.Equals(saved.Result, "Success", StringComparison.OrdinalIgnoreCase))
+                return JudgeSuccess(run, Normalize(executionMessage)!);
+            if (string.Equals(saved.Result, "Failed", StringComparison.OrdinalIgnoreCase) && saved.ErrorCode == ImeStderrErrorCode)
+                return JudgeStderrFailure(run, Normalize(executionMessage)!);
+            return NotComparable("no_saved_output");
+        }
+
+        private static PlatformOutputJudgement JudgeSuccess(PlatformScriptRun run, string savedStdout)
+        {
+            var stdout = NormalizeEmitted(run.Stdout, out var stdoutCut);
+            var stderr = Normalize(run.Stderr);
+            var stderrClean = string.IsNullOrEmpty(stderr);
+
+            if (!string.IsNullOrEmpty(stdout) && Agrees(stdout!, stdoutCut, savedStdout))
+                return stderrClean ? Verified() : Correct(PlatformOutputVerdict.Repaired, "stderr_cleared", savedStdout, string.Empty);
+
+            if (stdout != null && stdout.Length == 0 && savedStdout.Length == 0)
+                return stderrClean ? Verified() : Correct(PlatformOutputVerdict.Foreign, "stderr_on_success", string.Empty, string.Empty);
+
+            if (stdout == null)
+            {
+                if (!stderrClean) return Correct(PlatformOutputVerdict.Foreign, "stderr_on_success", savedStdout, string.Empty);
+                return savedStdout.Length > 0
+                    ? Correct(PlatformOutputVerdict.Repaired, "stdout_missing", savedStdout, string.Empty)
+                    : NotComparable("nothing_read");
+            }
+
+            // "write output done. output = X, error = Y" splits at the first ", error =" — a stdout that
+            // contains the separator ends up partly in stderr. The saved text shows the cut right there.
+            if (stdout.Length > 0 && !stdoutCut && !stderrClean
+                && savedStdout.StartsWith(stdout, StringComparison.Ordinal)
+                && savedStdout.Substring(stdout.Length).TrimStart().StartsWith(OutputErrorSeparator, StringComparison.Ordinal))
+                return Correct(PlatformOutputVerdict.Repaired, "stdout_split", savedStdout, string.Empty);
+
+            return Correct(PlatformOutputVerdict.Foreign, "stdout_differs", savedStdout, string.Empty);
+        }
+
+        private static PlatformOutputJudgement JudgeStderrFailure(PlatformScriptRun run, string savedStderr)
+        {
+            var stderr = NormalizeEmitted(run.Stderr, out var stderrCut);
+            if (!string.IsNullOrEmpty(stderr) && Agrees(stderr!, stderrCut, savedStderr)) return Verified();
+
+            // Nothing of the end block read: complete the stderr, the run's stdout stays as emitted.
+            if (run.Stderr == null && run.Stdout == null)
+                return Correct(PlatformOutputVerdict.Repaired, "stderr_missing", null, savedStderr);
+
+            // The end block read said something else — an empty stderr included: IME read stderr from this
+            // run's error file. The block's stdout is the other executor's as well.
+            return Correct(PlatformOutputVerdict.Foreign, "stderr_differs", string.Empty, savedStderr);
+        }
+
+        private static bool Agrees(string emitted, bool emittedCut, string saved)
+            => string.Equals(emitted, saved, StringComparison.Ordinal)
+            || (emittedCut && saved.StartsWith(emitted, StringComparison.Ordinal));
+
+        /// <summary>CR LF and lone CR to LF, then Trim — what the tracker's line reader and handlers make of a text.</summary>
+        internal static string? Normalize(string? text)
+            => text?.Replace("\r\n", "\n").Replace('\r', '\n').Trim();
+
+        private static string? NormalizeEmitted(string? text, out bool cut)
+        {
+            cut = false;
+            if (text == null) return null;
+            if (text.EndsWith(ImeLogTracker.OutputTruncationMarker, StringComparison.Ordinal))
+            {
+                cut = true;
+                text = text.Substring(0, text.Length - ImeLogTracker.OutputTruncationMarker.Length);
+            }
+            return Normalize(text);
+        }
+
+        private static PlatformOutputJudgement Verified()
+            => new PlatformOutputJudgement { Verdict = PlatformOutputVerdict.Verified, Reason = "match" };
+
+        private static PlatformOutputJudgement NotComparable(string reason)
+            => new PlatformOutputJudgement { Verdict = PlatformOutputVerdict.NotComparable, Reason = reason };
+
+        private static PlatformOutputJudgement Correct(PlatformOutputVerdict verdict, string reason, string? stdout, string? stderr)
+            => new PlatformOutputJudgement
+            {
+                Verdict = verdict,
+                Reason = reason,
+                // The tracker's own output cap: a corrected value is never longer than an emitted one.
+                Stdout = stdout == null ? null : ImeLogTracker.TruncateOutput(stdout),
+                Stderr = stderr == null ? null : ImeLogTracker.TruncateOutput(stderr),
+            };
+    }
+}

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; }
 
@@ -53,7 +52,14 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
     /// </summary>
     internal sealed class OobeUpdateTelemetry
     {
-        internal const int MaxPageEventsPerRun = 50;
+        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;
 
@@ -98,31 +106,50 @@ 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 and <see cref="MaxPageEventsPerRun"/>
-        /// per run — a page that logs the same name in a loop cannot flood the session.
+        /// <see cref="MaxPageEventsPerKey"/> per page/name — a page that logs the same name in a
+        /// 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 void ReportPage(OobeUpdatePageRecord record, DateTime occurredAtUtc, bool isBackfill)
+        public bool ReportPage(OobeUpdatePageRecord record, DateTime occurredAtUtc, bool isBackfill)
         {
-            if (record == null) return;
+            if (record == null) return false;
 
+            var isEventName = record.CxhEvent == OobeUpdateVocabulary.EventName;
             var key = $"{record.CxhEvent}:{record.Page ?? record.Name}";
-            int occurrence;
+            var budget = isBackfill ? MaxBackfillPageEventsPerRun : MaxPageEventsPerRun;
+            var occurrence = 0;
+            bool overBudget;
+            var firstOverBudget = false;
             lock (_lock)
             {
-                if (_pageEvents >= MaxPageEventsPerRun)
+                overBudget = isEventName && (isBackfill ? _backfillPageEvents : _livePageEvents) >= budget;
+                if (overBudget)
                 {
-                    if (!_pageCapLogged)
-                    {
-                        _pageCapLogged = true;
-                        _logger.Info($"OOBE update page telemetry: {MaxPageEventsPerRun} events reached, the rest of this run stays in agent.log");
-                    }
-                    return;
+                    firstOverBudget = isBackfill ? !_backfillCapReported : !_liveCapReported;
+                    if (isBackfill) _backfillCapReported = true;
+                    else _liveCapReported = true;
                 }
-                _pageEventsPerKey.TryGetValue(key, out occurrence);
-                if (occurrence >= MaxPageEventsPerKey) return;
-                occurrence++;
-                _pageEventsPerKey[key] = occurrence;
-                _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>
@@ -138,6 +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,
+                $"OOBE update page: {budget} {kind}event names reached, later ones of this agent run are not sent",
+                new Dictionary<string, object>
+                {
+                    { "cxhEvent", OobeUpdateVocabulary.NamesCapped },
+                    { "eventTime", occurredAtUtc.ToString("o") },
+                    { "backfill", isBackfill },
+                    { "limit", budget },
+                });
+        }
+
+        private bool EmitPage(DateTime occurredAtUtc, string message, Dictionary<string, object> data)
+        {
             try
             {
                 _post.Emit(new EnrollmentEvent
@@ -149,14 +202,16 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
                     Severity = EventSeverity.Debug,
                     Source = Source,
                     Phase = EnrollmentPhase.Unknown,
-                    Message = DescribePage(record),
+                    Message = message,
                     Data = data,
                     ImmediateUpload = false,
                 });
+                return true;
             }
             catch (Exception ex)
             {
                 _logger.Debug($"OOBE update page telemetry failed: {ex.Message}");
+                return false;
             }
         }
 
@@ -231,9 +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)

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

@@ -224,27 +224,27 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
             switch (eventId)
             {
                 case EventId_InitiatingChanges:
-                    step = "initiating";
-                    osStep = IsState(targetState, "Installed") ? OsUpdateSteps.InstallStarted
+                    step = OobeUpdateVocabulary.StepInitiating;
+                    osStep = IsState(targetState, OobeUpdateVocabulary.InstalledState) ? OsUpdateSteps.InstallStarted
                         : IsState(targetState, "Staged") ? OsUpdateSteps.StagingStarted
                         : null;
                     message = $"Servicing started for {pkg}: {(string.IsNullOrEmpty(initialState) ? "?" : initialState)} → {target}";
                     break;
                 case EventId_StateReached:
-                    step = "state_reached";
-                    osStep = IsState(targetState, "Installed") ? OsUpdateSteps.Installed
+                    step = OobeUpdateVocabulary.StepStateReached;
+                    osStep = IsState(targetState, OobeUpdateVocabulary.InstalledState) ? OsUpdateSteps.Installed
                         : IsState(targetState, "Staged") ? OsUpdateSteps.Staged
                         : null;
                     message = $"Servicing finished for {pkg}: now {target}";
                     break;
                 case EventId_RebootRequired:
-                    step = "reboot_required";
+                    step = OobeUpdateVocabulary.StepRebootRequired;
                     osStep = OsUpdateSteps.RebootRequired;
                     message = $"Servicing needs a restart to finish {pkg} → {target}";
                     break;
                 case EventId_ChangeFailed:
                 case EventId_PartiallyInstalled:
-                    step = "failed";
+                    step = OobeUpdateVocabulary.StepFailed;
                     osStep = OsUpdateSteps.Failed;
                     severity = EventSeverity.Warning;
                     message = $"Servicing FAILED for {pkg} → {target}" +
@@ -280,7 +280,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
                 Timestamp = timeCreatedUtc ?? DateTime.UtcNow,
                 EventType = Constants.EventTypes.WindowsUpdateServicing,
                 Severity = severity,
-                Source = "ServicingWatcher",
+                Source = Constants.EventSources.ServicingWatcher,
                 Phase = EnrollmentPhase.Unknown,
                 Message = message,
                 Data = data,

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

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics.Eventing.Reader;
+using System.Globalization;
 using System.Text.RegularExpressions;
 using System.Threading;
 using AutopilotMonitor.Agent.V2.Core.Logging;
@@ -50,6 +51,13 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
         /// </summary>
         internal const int BackfillLookbackMaxMinutes = 360;
 
+        /// <summary>
+        /// Lookback of the first run's update page backfill (<see cref="BackfillUpdatePageTelemetry"/>)
+        /// — the hour the servicing watcher reads back, so the page's records and the update's
+        /// servicing steps cover the same time.
+        /// </summary>
+        internal const int UpdatePageBackfillLookbackMinutes = 60;
+
         private static readonly HashSet<int> TrackedShellCoreEventIds = new HashSet<int>
         {
             EventId_ShellCore_WebAppStarted,
@@ -62,17 +70,20 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
             @"OOBE_ESP.*Exiting", RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
         // Manifest templates: 62404 "... started. CXID: '%1'.", 62405 "... stopped. Result: '%1'.",
-        // 62406 "... Event 1. Name: '%1'.", 62407 "... Event 2. Name: '%1', Value: '%2'.". A 62407
-        // value can carry URLs with tenant ids — a value leaves the tracker only in a form that
-        // cannot (SafeValuePattern: a boolean, an integer, an HRESULT).
+        // 62406 "... Event 1. Name: '%1'.", 62407 "... Event 2. Name: '%1', Value: '%2'.". The
+        // fields are read from the event PROPERTIES (%1/%2): the formatted message is localized
+        // ("Ergebnis: '…'", "Nom : « … »"), so these patterns are only the fallback for a record
+        // without properties and accept « » and a space before the colon. A 62407 value can carry
+        // URLs with tenant ids — a value leaves the tracker only in a form that cannot
+        // (SafeValuePattern: a boolean, an integer, an HRESULT).
         private static readonly Regex CxidPattern = new Regex(
-            @"CXID:\s*'([^']*)'", RegexOptions.CultureInvariant | RegexOptions.Compiled, TimeSpan.FromMilliseconds(100));
+            @"CXID\s*:\s*['\u00AB]\s*([^'\u00BB]*?)\s*['\u00BB]", RegexOptions.CultureInvariant | RegexOptions.Compiled, TimeSpan.FromMilliseconds(100));
         private static readonly Regex ResultPattern = new Regex(
-            @"Result:\s*'([^']*)'", RegexOptions.CultureInvariant | RegexOptions.Compiled, TimeSpan.FromMilliseconds(100));
+            @"Result\s*:\s*['\u00AB]\s*([^'\u00BB]*?)\s*['\u00BB]", RegexOptions.CultureInvariant | RegexOptions.Compiled, TimeSpan.FromMilliseconds(100));
         private static readonly Regex NamePattern = new Regex(
-            @"Name:\s*'([^']*)'", RegexOptions.CultureInvariant | RegexOptions.Compiled, TimeSpan.FromMilliseconds(100));
+            @"Name\s*:\s*['\u00AB]\s*([^'\u00BB]*?)\s*['\u00BB]", RegexOptions.CultureInvariant | RegexOptions.Compiled, TimeSpan.FromMilliseconds(100));
         private static readonly Regex ValuePattern = new Regex(
-            @"Value:\s*'([^']*)'", RegexOptions.CultureInvariant | RegexOptions.Compiled, TimeSpan.FromMilliseconds(100));
+            @"Value\s*:\s*['\u00AB]\s*([^'\u00BB]*?)\s*['\u00BB]", RegexOptions.CultureInvariant | RegexOptions.Compiled, TimeSpan.FromMilliseconds(100));
         private static readonly Regex SafeValuePattern = new Regex(
             @"^(?:true|false|-?[0-9]{1,10}|0x[0-9a-f]{1,8})$",
             RegexOptions.CultureInvariant | RegexOptions.IgnoreCase | RegexOptions.Compiled, TimeSpan.FromMilliseconds(100));
@@ -84,6 +95,11 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
         private readonly InformationalEventPost _post;
         private readonly HelloTracker _helloTracker;
         private readonly OobeUpdateTelemetry _oobeUpdate;
+        // Shell-Core RecordIds of the update-page records already reported: the restart backfill
+        // must not report a record an earlier run already sent (D-310 field data: the same 20
+        // records came twice after a restart).
+        private readonly EventRecordWatermark _pageWatermark;
+        internal const string PageWatermarkStateFileName = "shellcore-page-watermark.json";
 
         private EventLogWatcher _watcher;
         private int _started;
@@ -91,7 +107,10 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
         private bool _espExitDetected;
         private bool _whiteGloveDetected;
         private bool _helloWizardStartDetected;
-        private string _lastCxhPage; // 62405 names no page, it ends the last one started
+        // 62405 names no page, it ends the last one started. The live watcher's page; a backfill
+        // moves it only with a newer record (see ObserveCxhRecord).
+        private string _lastCxhPage;
+        private long _lastCxhPageRecordId = -1;
         private readonly object _stateLock = new object();
 
         /// <summary>
@@ -131,7 +150,8 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
             InformationalEventPost post,
             AgentLogger logger,
             HelloTracker helloTracker,
-            Func<IReadOnlyList<OobeUpdateRegistrySnapshot.KeyState>> oobeUpdateRegistryReader = null)
+            Func<IReadOnlyList<OobeUpdateRegistrySnapshot.KeyState>> oobeUpdateRegistryReader = null,
+            string stateDirectory = null)
         {
             _sessionId = sessionId ?? throw new ArgumentNullException(nameof(sessionId));
             _tenantId = tenantId ?? throw new ArgumentNullException(nameof(tenantId));
@@ -141,17 +161,24 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
             // Test seam: a fake registry reader; production reads the real registry.
             _oobeUpdate = new OobeUpdateTelemetry(sessionId, tenantId, post, logger,
                 oobeUpdateRegistryReader ?? OobeUpdateRegistrySnapshot.Read);
+            _pageWatermark = new EventRecordWatermark(stateDirectory, PageWatermarkStateFileName, logger, "Shell-Core update page");
         }
 
         internal bool IsEspExitedForTest { get { lock (_stateLock) { return _espExitDetected; } } }
         internal bool IsWhiteGloveDetectedForTest { get { lock (_stateLock) { return _whiteGloveDetected; } } }
 
+        /// <summary>Loads the update-page watermark as <see cref="Start"/> does, without arming the watcher.</summary>
+        internal void LoadPageWatermark() => _pageWatermark.Load();
+
         public void Start()
         {
             // The OOBE update registry state at every agent start — so also right after the
             // update's restart (D-310).
             if (Interlocked.Exchange(ref _started, 1) == 0)
+            {
                 _oobeUpdate.ReportState(OobeUpdateTelemetry.Moments.AgentStart);
+                _pageWatermark.Load();
+            }
 
             try
             {
@@ -177,7 +204,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
                 // WhiteGlove success — indistinguishable on the backend from a real no-signal
                 // enrollment. Surface it as one-shot telemetry.
                 CollectorDegradationReporter.Report(_post, _sessionId, _tenantId,
-                    collectorName: "ShellCoreTracker", reason: "watcher_arm_failed", ex: ex);
+                    collectorName: Constants.EventSources.ShellCoreTracker, reason: "watcher_arm_failed", ex: ex);
             }
         }
 
@@ -185,7 +212,9 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
         {
             // Stop runs again from Dispose — one snapshot, and only for a tracker that started.
             if (Volatile.Read(ref _started) == 1 && Interlocked.Exchange(ref _stopReported, 1) == 0)
+            {
                 _oobeUpdate.ReportState(OobeUpdateTelemetry.Moments.AgentStop);
+            }
 
             if (_watcher == null) return;
             try
@@ -216,7 +245,8 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
                 var description = record.FormatDescription() ?? $"Event ID {record.Id}";
                 var timestamp = (record.TimeCreated ?? DateTime.UtcNow).ToUniversalTime();
 
-                ProcessEvent(record.Id, description, timestamp, record.ProviderName ?? "", isBackfill: false);
+                ProcessEvent(record.Id, description, timestamp, record.ProviderName ?? "", isBackfill: false,
+                    recordId: record.RecordId ?? -1, properties: ReadProperties(record));
             }
             catch (Exception ex)
             {
@@ -228,9 +258,17 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
         /// Core event-processing logic. Exposed as internal so tests can drive it without
         /// needing to synthesize an <see cref="EventRecord"/> (abstract + Windows-only).
         /// </summary>
-        internal void ProcessEvent(int eventId, string description, DateTime timestamp, string providerName, bool isBackfill)
+        internal void ProcessEvent(
+            int eventId,
+            string description,
+            DateTime timestamp,
+            string providerName,
+            bool isBackfill,
+            long recordId = -1,
+            IReadOnlyList<string> properties = null)
         {
-            ObserveCxhRecord(eventId, description, timestamp, isBackfill);
+            var fields = ReadCxhFields(eventId, description, properties);
+            ObserveCxhRecord(eventId, fields, timestamp, isBackfill, recordId, backfillPage: null);
             if (eventId == EventId_ShellCore_WebAppStopped || eventId == EventId_ShellCore_WebAppEventName) return;
 
             string eventType;
@@ -244,7 +282,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
             switch (eventId)
             {
                 case EventId_ShellCore_WebAppStarted: // 62404
-                    if (description.Contains("AADHello") || description.Contains("'NGC'"))
+                    if (IsHelloWizardStart(fields.Primary, description))
                     {
                         eventType = Constants.EventTypes.HelloWizardStarted;
                         message = "Windows Hello wizard started (CloudExperienceHost)";
@@ -431,30 +469,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
         {
             try
             {
-                var lookbackMs = ClampLookbackMinutes(lookbackMinutes) * 60 * 1000;
-                var query = new EventLogQuery(
-                    ShellCoreEventLogChannel,
-                    PathType.LogName,
-                    $"*[System[{WatchedEventIdsXPath} and TimeCreated[timediff(@SystemTime) <= {lookbackMs}]]]");
-
-                var records = new List<(int Id, string Description, DateTime OccurredAtUtc)>();
-                using (var reader = new EventLogReader(query))
-                {
-                    for (EventRecord record = reader.ReadEvent(); record != null; record = reader.ReadEvent())
-                    {
-                        using (record)
-                        {
-                            var description = record.FormatDescription() ?? "";
-                            // Preserve the historical event time across backfill so subscribers
-                            // (EspAndHelloTrackerAdapter) can stamp signals with the source time
-                            // rather than collapsing to wall-clock-now.
-                            var timestamp = (record.TimeCreated ?? DateTime.UtcNow).ToUniversalTime();
-                            records.Add((record.Id, description, timestamp));
-                        }
-                    }
-                }
-
-                ReplayBackfillRecords(records);
+                ReplayBackfillRecords(ReadRecentRecords(lookbackMinutes));
             }
             catch (Exception ex)
             {
@@ -462,6 +477,76 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
             }
         }
 
+        /// <summary>
+        /// The FIRST run's counterpart of the restart replay, for telemetry only: the update
+        /// page's records of the last <paramref name="lookbackMinutes"/> minutes (clamped like
+        /// the replay) become <c>oobe_update_page</c> rows. The agent is installed during the ESP
+        /// and can start after the update page began; without this its time attribution has no
+        /// page start to begin the update with (field: a first run 7 min after the update's
+        /// restart saw neither the page start nor the update's first half).
+        /// <para>
+        /// Nothing else is looked at: no Hello-wizard replay, no ESP exit or failure count, no
+        /// <c>agent_trace</c>. The first run keeps its decision behaviour exactly — see
+        /// <see cref="ReplayBackfillRecords"/> for why no replayed record may reach the engine and
+        /// <c>DefaultComponentFactory.ResolveEspExitBackfillLookbackMinutes</c> for why the first
+        /// run has no replay. No boot bound: an agent that first starts after the update's restart
+        /// is exactly the case to cover; the RecordId watermark keeps it from re-sending.
+        /// </para>
+        /// </summary>
+        public void BackfillUpdatePageTelemetry(int lookbackMinutes)
+        {
+            try
+            {
+                ReplayUpdatePageTelemetry(ReadRecentRecords(lookbackMinutes));
+            }
+            catch (Exception ex)
+            {
+                _logger.Warning($"Shell-Core update page backfill failed: {ex.Message}");
+            }
+        }
+
+        /// <summary>The update page telemetry of a chronological batch of Shell-Core records — nothing else.</summary>
+        internal void ReplayUpdatePageTelemetry(IReadOnlyList<ShellCoreRecord> records)
+        {
+            if (records == null || records.Count == 0) return;
+
+            var page = new BackfillPageCursor();
+            foreach (var record in records)
+            {
+                var fields = ReadCxhFields(record.Id, record.Description ?? string.Empty, record.Properties);
+                ObserveCxhRecord(record.Id, fields, record.OccurredAtUtc, isBackfill: true, recordId: record.RecordId, backfillPage: page);
+            }
+        }
+
+        /// <summary>The watched Shell-Core records of the last minutes, oldest first, with their original event time.</summary>
+        private List<ShellCoreRecord> ReadRecentRecords(int lookbackMinutes)
+        {
+            var lookbackMs = ClampLookbackMinutes(lookbackMinutes) * 60 * 1000;
+            var query = new EventLogQuery(
+                ShellCoreEventLogChannel,
+                PathType.LogName,
+                $"*[System[{WatchedEventIdsXPath} and TimeCreated[timediff(@SystemTime) <= {lookbackMs}]]]");
+
+            var records = new List<ShellCoreRecord>();
+            using (var reader = new EventLogReader(query))
+            {
+                for (EventRecord record = reader.ReadEvent(); record != null; record = reader.ReadEvent())
+                {
+                    using (record)
+                    {
+                        var description = record.FormatDescription() ?? "";
+                        // Preserve the historical event time across backfill so subscribers
+                        // (EspAndHelloTrackerAdapter) can stamp signals with the source time
+                        // rather than collapsing to wall-clock-now.
+                        var timestamp = (record.TimeCreated ?? DateTime.UtcNow).ToUniversalTime();
+                        records.Add(new ShellCoreRecord(record.Id, description, timestamp,
+                            record.RecordId ?? -1, ReadProperties(record)));
+                    }
+                }
+            }
+            return records;
+        }
+
         /// <summary>
         /// Replays a chronological batch of Shell-Core records. <b>Only the Hello-wizard start
         /// (62404) is replayed.</b> ESP exits and ESP failures (62407) are counted and reported,
@@ -502,6 +587,14 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
         /// </summary>
         internal void ReplayBackfillRecords(
             IReadOnlyList<(int Id, string Description, DateTime OccurredAtUtc)> records)
+        {
+            if (records == null) return;
+            var converted = new List<ShellCoreRecord>(records.Count);
+            foreach (var r in records) converted.Add(new ShellCoreRecord(r.Id, r.Description, r.OccurredAtUtc));
+            ReplayBackfillRecords(converted);
+        }
+
+        internal void ReplayBackfillRecords(IReadOnlyList<ShellCoreRecord> records)
         {
             if (records == null || records.Count == 0) return;
 
@@ -509,15 +602,17 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
             var skippedFailures = 0;
             DateTime? oldestSkipped = null;
             DateTime? newestSkipped = null;
+            var page = new BackfillPageCursor();
 
             foreach (var record in records)
             {
                 var description = record.Description ?? string.Empty;
-                ObserveCxhRecord(record.Id, description, record.OccurredAtUtc, isBackfill: true);
+                var fields = ReadCxhFields(record.Id, description, record.Properties);
+                ObserveCxhRecord(record.Id, fields, record.OccurredAtUtc, isBackfill: true, recordId: record.RecordId, backfillPage: page);
 
                 if (record.Id == EventId_ShellCore_WebAppStarted)
                 {
-                    HandleBackfillRecord(record.Id, description, record.OccurredAtUtc);
+                    HandleBackfillRecord(record.Id, description, record.OccurredAtUtc, fields.Primary);
                     continue;
                 }
 
@@ -556,7 +651,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
                     TenantId = _tenantId,
                     EventType = Constants.EventTypes.AgentTrace,
                     Severity = EventSeverity.Info,
-                    Source = "ShellCoreTracker",
+                    Source = Constants.EventSources.ShellCoreTracker,
                     Phase = EnrollmentPhase.Unknown,
                     Message =
                         $"Shell-Core replay skipped {skippedExits} ESP exit(s) and {skippedFailures} ESP failure(s) " +
@@ -586,7 +681,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
         /// (<c>record.TimeCreated</c>); subscribers read it via
         /// <see cref="LastEventOccurredAtUtc"/> during their synchronous event handler.
         /// </summary>
-        internal void HandleBackfillRecord(int eventId, string description, DateTime occurredAtUtc)
+        internal void HandleBackfillRecord(int eventId, string description, DateTime occurredAtUtc, string cxid = null)
         {
             if (eventId == EventId_ShellCore_WebAppStarted)
             {
@@ -594,7 +689,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
                 // are unrelated. Fire-once so a replayed log tail cannot re-raise (downstream is
                 // idempotent anyway: HelloTracker once-guard, adapter dedup flag, engine
                 // set-once fact — this guard just keeps the noise down).
-                if (!description.Contains("AADHello") && !description.Contains("'NGC'")) return;
+                if (!IsHelloWizardStart(cxid ?? ReadCxhFields(eventId, description, null).Primary, description)) return;
 
                 bool shouldRaiseWizard;
                 lock (_stateLock)
@@ -624,38 +719,67 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
         // CloudExperienceHost navigation: breadcrumbs and OOBE update page telemetry (D-310)
         // =====================================================================
 
+        /// <summary>The last page started within one backfill batch.</summary>
+        private sealed class BackfillPageCursor
+        {
+            public string Page;
+        }
+
         /// <summary>
         /// Writes one agent.log line per CloudExperienceHost page start/stop and per update-page
         /// event name, so a diagnostics package shows the OOBE navigation. Records of the update
         /// page itself (<c>OobeNDUP</c>, <c>RebootNDUP</c> and its <c>ExpeditedUpdate_*</c> names)
-        /// are also reported as <c>oobe_update_page</c>, and at the page's live start and stop the
-        /// registry state behind it as <c>oobe_update_state</c>. No decision.
+        /// are also reported as <c>oobe_update_page</c> — once across agent runs, by RecordId — and
+        /// at the page's live start and stop the registry state behind it as
+        /// <c>oobe_update_state</c>. No decision.
+        /// <para>
+        /// A stop (62405) belongs to the page started last. A backfill batch
+        /// (<paramref name="backfillPage"/>) reads records older than the live watcher's, which is
+        /// armed first, so it keeps its own last page; it moves the live watcher's only with a
+        /// record of a higher RecordId — a replayed older start must not take over the next live
+        /// stop, and a first run's live stop still finds the page that started before the agent.
+        /// </para>
         /// </summary>
-        private void ObserveCxhRecord(int eventId, string description, DateTime occurredAtUtc, bool isBackfill)
+        private void ObserveCxhRecord(int eventId, CxhFields fields, DateTime occurredAtUtc, bool isBackfill, long recordId,
+            BackfillPageCursor backfillPage)
         {
             try
             {
                 string page;
                 lock (_stateLock)
                 {
-                    if (eventId == EventId_ShellCore_WebAppStarted)
-                        _lastCxhPage = ExtractToken(CxidPattern, description) ?? _lastCxhPage;
-                    page = _lastCxhPage;
+                    if (eventId == EventId_ShellCore_WebAppStarted && fields.Primary != null)
+                    {
+                        if (backfillPage != null) backfillPage.Page = fields.Primary;
+                        if (backfillPage == null || (recordId >= 0 && recordId > _lastCxhPageRecordId))
+                        {
+                            _lastCxhPage = fields.Primary;
+                            if (recordId >= 0) _lastCxhPageRecordId = recordId;
+                        }
+                    }
+                    page = backfillPage != null ? backfillPage.Page : _lastCxhPage;
                 }
 
-                var crumb = FormatCxhBreadcrumb(eventId, description, page);
+                var crumb = FormatCxhBreadcrumb(eventId, fields, page);
                 if (crumb == null) return;
                 _logger.Info(isBackfill ? $"{crumb} (backfill, at {occurredAtUtc:o})" : crumb);
 
-                var record = ParseUpdatePageRecord(eventId, description, page);
+                var record = ParseUpdatePageRecord(eventId, fields, page);
                 if (record == null) return;
-                _oobeUpdate.ReportPage(record, occurredAtUtc, isBackfill);
+                // A record an earlier run (or this one) already reported — the restart backfill
+                // re-reads the minutes before the restart.
+                if (!_pageWatermark.TryClaim(recordId)) return;
+
+                // Only a reported record moves the state file — at most the run budget plus the
+                // page boundaries; one over the budget stays claimed for this run only.
+                if (_oobeUpdate.ReportPage(record, occurredAtUtc, isBackfill))
+                    _pageWatermark.MarkEmitted(recordId);
 
                 // The registry is read now — only a live page boundary is the page's moment.
-                if (!isBackfill && record.CxhEvent != OobeUpdatePageRecord.EventName)
+                if (!isBackfill && record.CxhEvent != OobeUpdateVocabulary.EventName)
                 {
                     _oobeUpdate.ReportState(
-                        record.CxhEvent == OobeUpdatePageRecord.PageStarted
+                        record.CxhEvent == OobeUpdateVocabulary.PageStarted
                             ? OobeUpdateTelemetry.Moments.UpdatePageStarted
                             : OobeUpdateTelemetry.Moments.UpdatePageStopped,
                         record.Page);
@@ -667,32 +791,74 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
             }
         }
 
+        /// <summary>The own fields of a CloudExperienceHost record: CXID, result or name (%1) and the 62407 value (%2).</summary>
+        internal readonly struct CxhFields
+        {
+            public CxhFields(string primary, string value)
+            {
+                Primary = primary;
+                Value = value;
+            }
+
+            /// <summary>62404: CXID; 62405: result; 62406/62407: event name. Null when not readable.</summary>
+            public string Primary { get; }
+
+            /// <summary>62407: the raw value (never logged or sent unless it is of a safe form).</summary>
+            public string Value { get; }
+        }
+
+        /// <summary>
+        /// The record's fields from its event properties, which carry them verbatim in every
+        /// display language. Without properties (a test, a record that failed to render them) the
+        /// formatted message is parsed — English punctuation and « » only, so a localized label
+        /// ("Ergebnis", "Nom") yields null there.
+        /// </summary>
+        internal static CxhFields ReadCxhFields(int eventId, string description, IReadOnlyList<string> properties)
+        {
+            if (properties != null && properties.Count > 0)
+            {
+                return new CxhFields(
+                    Bound(properties[0]),
+                    eventId == EventId_ShellCore_WebAppEvent && properties.Count > 1 ? Bound(properties[1]) : null);
+            }
+
+            switch (eventId)
+            {
+                case EventId_ShellCore_WebAppStarted:
+                    return new CxhFields(ExtractToken(CxidPattern, description), null);
+                case EventId_ShellCore_WebAppStopped:
+                    return new CxhFields(ExtractToken(ResultPattern, description), null);
+                case EventId_ShellCore_WebAppEventName:
+                    return new CxhFields(ExtractToken(NamePattern, description), null);
+                case EventId_ShellCore_WebAppEvent:
+                    return new CxhFields(ExtractToken(NamePattern, description), ExtractToken(ValuePattern, description));
+                default:
+                    return default;
+            }
+        }
+
         /// <summary>
         /// The breadcrumb for one Shell-Core record, or null when it is not one: a page start
         /// (62404, its CXID), a page stop (62405, its result, attributed to the last started
         /// page), or an update-page event name (62406/62407 — a 62407 value only in a safe form).
         /// </summary>
-        internal static string FormatCxhBreadcrumb(int eventId, string description, string lastPage)
+        internal static string FormatCxhBreadcrumb(int eventId, string description, string lastPage) =>
+            FormatCxhBreadcrumb(eventId, ReadCxhFields(eventId, description, null), lastPage);
+
+        internal static string FormatCxhBreadcrumb(int eventId, CxhFields fields, string lastPage)
         {
             switch (eventId)
             {
                 case EventId_ShellCore_WebAppStarted:
-                {
-                    var cxid = ExtractToken(CxidPattern, description);
-                    return cxid == null ? null : $"CXH page started: {cxid}";
-                }
+                    return fields.Primary == null ? null : $"CXH page started: {fields.Primary}";
                 case EventId_ShellCore_WebAppStopped:
-                {
-                    var result = ExtractToken(ResultPattern, description) ?? "?";
-                    return $"CXH page stopped: {lastPage ?? "?"} (result={result})";
-                }
+                    return $"CXH page stopped: {lastPage ?? "?"} (result={fields.Primary ?? "?"})";
                 case EventId_ShellCore_WebAppEventName:
                 case EventId_ShellCore_WebAppEvent:
                 {
-                    var name = ExtractToken(NamePattern, description);
-                    if (!IsUpdatePageToken(name)) return null;
-                    var value = eventId == EventId_ShellCore_WebAppEvent ? ExtractSafeValue(description) : null;
-                    return value == null ? $"CXH event: {name}" : $"CXH event: {name} (value={value})";
+                    if (!IsUpdatePageToken(fields.Primary)) return null;
+                    var value = eventId == EventId_ShellCore_WebAppEvent ? SafeValue(fields.Value) : null;
+                    return value == null ? $"CXH event: {fields.Primary}" : $"CXH event: {fields.Primary} (value={value})";
                 }
                 default:
                     return null;
@@ -704,29 +870,28 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
         /// the start of a page whose CXID names NDUP, the stop of such a page (62405, attributed
         /// to the last started page), or an update-page event name from 62406/62407.
         /// </summary>
-        internal static OobeUpdatePageRecord ParseUpdatePageRecord(int eventId, string description, string lastPage)
+        internal static OobeUpdatePageRecord ParseUpdatePageRecord(int eventId, string description, string lastPage) =>
+            ParseUpdatePageRecord(eventId, ReadCxhFields(eventId, description, null), lastPage);
+
+        internal static OobeUpdatePageRecord ParseUpdatePageRecord(int eventId, CxhFields fields, string lastPage)
         {
             switch (eventId)
             {
                 case EventId_ShellCore_WebAppStarted:
-                {
-                    var cxid = ExtractToken(CxidPattern, description);
-                    return IsUpdatePageToken(cxid)
-                        ? new OobeUpdatePageRecord(OobeUpdatePageRecord.PageStarted, eventId, page: cxid)
+                    return IsUpdatePageToken(fields.Primary)
+                        ? new OobeUpdatePageRecord(OobeUpdateVocabulary.PageStarted, eventId, page: fields.Primary)
                         : null;
-                }
                 case EventId_ShellCore_WebAppStopped:
                     return IsUpdatePageToken(lastPage)
-                        ? new OobeUpdatePageRecord(OobeUpdatePageRecord.PageStopped, eventId,
-                            page: lastPage, result: ExtractToken(ResultPattern, description) ?? "?")
+                        ? new OobeUpdatePageRecord(OobeUpdateVocabulary.PageStopped, eventId,
+                            page: lastPage, result: fields.Primary ?? "?")
                         : null;
                 case EventId_ShellCore_WebAppEventName:
                 case EventId_ShellCore_WebAppEvent:
                 {
-                    var name = ExtractToken(NamePattern, description);
-                    if (!IsUpdatePageToken(name)) return null;
-                    var value = eventId == EventId_ShellCore_WebAppEvent ? ExtractSafeValue(description) : null;
-                    return new OobeUpdatePageRecord(OobeUpdatePageRecord.EventName, eventId, name: name, value: value);
+                    if (!IsUpdatePageToken(fields.Primary)) return null;
+                    var value = eventId == EventId_ShellCore_WebAppEvent ? SafeValue(fields.Value) : null;
+                    return new OobeUpdatePageRecord(OobeUpdateVocabulary.EventName, eventId, name: fields.Primary, value: value);
                 }
                 default:
                     return null;
@@ -738,14 +903,26 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
             && (token.IndexOf("NDUP", StringComparison.OrdinalIgnoreCase) >= 0
                 || token.IndexOf("ExpeditedUpdate", StringComparison.OrdinalIgnoreCase) >= 0);
 
+        /// <summary>
+        /// The Hello wizard's CloudExperienceHost start: CXID <c>AADHello</c> or <c>NGC</c>. With
+        /// no readable CXID the formatted message decides, as before (an English or German
+        /// message quotes the CXID as <c>'NGC'</c>).
+        /// </summary>
+        internal static bool IsHelloWizardStart(string cxid, string description) =>
+            cxid != null
+                ? cxid.Contains("AADHello") || string.Equals(cxid, "NGC", StringComparison.Ordinal)
+                : description != null && (description.Contains("AADHello") || description.Contains("'NGC'"));
+
         /// <summary>
         /// The 62407 value when it is a boolean, an integer of up to ten digits or an HRESULT —
         /// forms that cannot carry a URL or a tenant id (the CSP gate, error codes). Null for
         /// anything else.
         /// </summary>
-        internal static string ExtractSafeValue(string description)
+        internal static string ExtractSafeValue(string description) =>
+            SafeValue(ReadCxhFields(EventId_ShellCore_WebAppEvent, description, null).Value);
+
+        internal static string SafeValue(string value)
         {
-            var value = ExtractToken(ValuePattern, description);
             if (string.IsNullOrEmpty(value)) return null;
             try
             {
@@ -763,9 +940,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
             try
             {
                 var match = pattern.Match(description);
-                if (!match.Success) return null;
-                var token = match.Groups[1].Value;
-                return token.Length > MaxBreadcrumbTokenLength ? token.Substring(0, MaxBreadcrumbTokenLength) + "…" : token;
+                return match.Success ? Bound(match.Groups[1].Value) : null;
             }
             catch (RegexMatchTimeoutException)
             {
@@ -773,6 +948,30 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
             }
         }
 
+        private static string Bound(string token)
+        {
+            if (string.IsNullOrEmpty(token)) return null;
+            return token.Length > MaxBreadcrumbTokenLength ? token.Substring(0, MaxBreadcrumbTokenLength) + "…" : token;
+        }
+
+        /// <summary>The event's property values as strings (the manifest's %1, %2, …); null when unreadable.</summary>
+        private static IReadOnlyList<string> ReadProperties(EventRecord record)
+        {
+            try
+            {
+                var properties = record.Properties;
+                if (properties == null || properties.Count == 0) return null;
+                var values = new string[properties.Count];
+                for (var i = 0; i < properties.Count; i++)
+                    values[i] = Convert.ToString(properties[i]?.Value, CultureInfo.InvariantCulture);
+                return values;
+            }
+            catch (Exception)
+            {
+                return null;
+            }
+        }
+
         // =====================================================================
         // Pattern helpers
         // =====================================================================
@@ -812,4 +1011,27 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
             return "Unknown_ESP_Failure";
         }
     }
+
+    /// <summary>One Shell-Core record read by the restart backfill.</summary>
+    internal readonly struct ShellCoreRecord
+    {
+        public ShellCoreRecord(int id, string description, DateTime occurredAtUtc, long recordId = -1, IReadOnlyList<string> properties = null)
+        {
+            Id = id;
+            Description = description;
+            OccurredAtUtc = occurredAtUtc;
+            RecordId = recordId;
+            Properties = properties;
+        }
+
+        public int Id { get; }
+        public string Description { get; }
+        public DateTime OccurredAtUtc { get; }
+
+        /// <summary>The channel's RecordId; -1 when unknown (no cross-run dedup).</summary>
+        public long RecordId { get; }
+
+        /// <summary>The event's property values (%1, %2, …); null when unknown.</summary>
+        public IReadOnlyList<string> Properties { get; }
+    }
 }

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

@@ -138,7 +138,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
         //   - Explicit "Required app failed" lines from the ESP required-app enforcer
         //
         // TODO(stall-probe-imelog-scan): Also scan IntuneManagementExtension.log (not just
-        // AppWorkload.log). Learning from the Oriflame session b4b5d37e-a993-453e-b16b-9b75098022e4
+        // AppWorkload.log). Learning from a field session
         // (MS Intune AAD token service outage 2026-04-08): the ESP blocker was
         //   "Failed to get AAD token. errorCode = 3399548929"  (= 0xCAA90001 AADSTS_SERVER_ERROR)
         // and this string lives in IntuneManagementExtension.log, NOT AppWorkload.log. Add a third
@@ -241,7 +241,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
                 if (alreadyFired)
                     continue;
 
-                RunProbe(probeIndex, thresholdMinutes, idleMinutes, genAtStart);
+                RunProbe(probeIndex, idleMinutes, genAtStart);
 
                 lock (_stateLock)
                 {
@@ -253,7 +253,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
             }
         }
 
-        private void RunProbe(int probeIndex, int thresholdMinutes, double idleMinutes, int generation)
+        private void RunProbe(int probeIndex, double idleMinutes, int generation)
         {
             var started = DateTime.UtcNow;
             var result = new ProbeResult { ProbeIndex = probeIndex, IdleMinutes = Math.Round(idleMinutes, 1) };

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

@@ -340,7 +340,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
                 Timestamp = timeCreatedUtc ?? DateTime.UtcNow,
                 EventType = Constants.EventTypes.SystemClockChanged,
                 Severity = isLargeStep ? EventSeverity.Warning : EventSeverity.Info,
-                Source = "SystemTimelineWatcher",
+                Source = Constants.EventSources.SystemTimelineWatcher,
                 Phase = EnrollmentPhase.Unknown,
                 Message = message,
                 Data = data,
@@ -467,7 +467,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
                 Timestamp = timeCreatedUtc ?? DateTime.UtcNow,
                 EventType = Constants.EventTypes.SystemSleepEpisode,
                 Severity = EventSeverity.Info,
-                Source = "SystemTimelineWatcher",
+                Source = Constants.EventSources.SystemTimelineWatcher,
                 Phase = EnrollmentPhase.Unknown,
                 Message = message,
                 Data = data,

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

@@ -405,7 +405,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
                 Timestamp = timeCreatedUtc ?? DateTime.UtcNow,
                 EventType = shape.EventType,
                 Severity = shape.Severity,
-                Source = "WindowsUpdateWatcher",
+                Source = Constants.EventSources.WindowsUpdateWatcher,
                 Phase = EnrollmentPhase.Unknown,
                 Message = BuildMessage(eventId, title, updateCount, data),
                 Data = data,
@@ -707,7 +707,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Enrollment.SystemSignals
                     TenantId = _tenantId,
                     EventType = Constants.EventTypes.WindowsUpdateChannelCensus,
                     Severity = EventSeverity.Debug,
-                    Source = "WindowsUpdateWatcher",
+                    Source = Constants.EventSources.WindowsUpdateWatcher,
                     Phase = EnrollmentPhase.Unknown,
                     Message = "Windows Update channel census: OS build changed across restart but no targeted WU events were captured — EventID histogram attached",
                     Data = data,

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Runtime/DiagnosticsPackageService.cs

@@ -1052,7 +1052,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Runtime
             if (!IsAllowedBlobUploadUrl(blobUploadUrl))
             {
                 _logger.Warning(
-                    $"Blob upload rejected: URL is not an allowed Azure Blob Storage endpoint " +
+                    $"Blob upload of {blobName} rejected: URL is not an allowed Azure Blob Storage endpoint " +
                     $"(expected https://*.blob.core.windows.net or sovereign-cloud equivalent). " +
                     $"URL prefix: {BuildSasUrlPrefix(blobUploadUrl)}");
                 return (false, "url_host_rejected");
@@ -1086,7 +1086,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Runtime
                     // Auth errors (401/403) are permanent — SAS token invalid or expired, retrying won't help
                     if (statusCode == 401 || statusCode == 403)
                     {
-                        _logger.Warning($"Blob upload auth error (not retryable): {lastErrorCode} - {responseBody}");
+                        _logger.Warning($"Blob upload of {blobName}: auth error (not retryable): {lastErrorCode} - {responseBody}");
                         return (false, lastErrorCode);
                     }
 
@@ -1106,7 +1106,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Runtime
                 }
             }
 
-            _logger.Warning($"Diagnostics package upload failed after {maxRetries} attempts");
+            _logger.Warning($"Diagnostics package upload failed after {maxRetries} attempts: {blobName}");
             return (false, lastErrorCode);
         }
     }

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Runtime/SelfUpdater.cs

@@ -145,7 +145,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Runtime
         /// On any failure, returns normally so the current version continues.
         /// </summary>
         /// <param name="forceUpdate">
-        /// When true, bypasses the IsNewerVersion check — used by the runtime-hash-mismatch trigger
+        /// When true, bypasses the version comparison — used by the runtime-hash-mismatch trigger
         /// to cover hotfixes that reuse the same version number.
         /// </param>
         /// <param name="triggerReason">
@@ -517,16 +517,6 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Runtime
             }
         }
 
-        /// <summary>
-        /// Compares two version strings. Returns true if latest is newer than current.
-        /// Strips SemVer suffixes (+metadata, -prerelease) before parsing because
-        /// System.Version cannot handle them (e.g. "1.0.386+b7f8d3c..." would fail).
-        /// </summary>
-        private static bool IsNewerVersion(string current, string latest)
-        {
-            return CompareVersions(current, latest) > 0;
-        }
-
         /// <summary>
         /// Compares two version strings. Returns negative when latest is older than current,
         /// zero when equal, positive when latest is newer than current. Returns

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Telemetry/Analyzers/SoftwareInventoryAnalyzer.cs

@@ -254,9 +254,9 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Telemetry.Analyzers
                                 if (subKey == null)
                                     continue;
 
-                                var displayName = subKey.GetValue("DisplayName")?.ToString();
+                                var displayName = ReadRegistryText(subKey, "DisplayName");
                                 var systemComponent = subKey.GetValue("SystemComponent");
-                                var parentKeyName = subKey.GetValue("ParentKeyName")?.ToString();
+                                var parentKeyName = ReadRegistryText(subKey, "ParentKeyName");
 
                                 if (ShouldExclude(displayName, systemComponent, parentKeyName))
                                     continue;
@@ -264,11 +264,11 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Telemetry.Analyzers
                                 results.Add(new SoftwareEntry
                                 {
                                     DisplayName = displayName,
-                                    DisplayVersion = subKey.GetValue("DisplayVersion")?.ToString(),
-                                    Publisher = subKey.GetValue("Publisher")?.ToString(),
-                                    InstallDate = subKey.GetValue("InstallDate")?.ToString(),
-                                    InstallLocation = subKey.GetValue("InstallLocation")?.ToString(),
-                                    UninstallString = subKey.GetValue("UninstallString")?.ToString(),
+                                    DisplayVersion = ReadRegistryText(subKey, "DisplayVersion"),
+                                    Publisher = ReadRegistryText(subKey, "Publisher"),
+                                    InstallDate = ReadRegistryText(subKey, "InstallDate"),
+                                    InstallLocation = ReadRegistryText(subKey, "InstallLocation"),
+                                    UninstallString = ReadRegistryText(subKey, "UninstallString"),
                                     IsWindowsInstaller = Convert.ToInt32(subKey.GetValue("WindowsInstaller") ?? 0) == 1,
                                     RegistrySource = source
                                 });
@@ -287,6 +287,22 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Telemetry.Analyzers
             }
         }
 
+        private static string ReadRegistryText(RegistryKey key, string name)
+            => CutAtNul(key.GetValue(name)?.ToString());
+
+        /// <summary>
+        /// A registry string the way Windows shows it: up to the first NUL. Some installers write
+        /// REG_SZ data padded with NULs, and .NET Framework drops only one terminator — the rest
+        /// would ride into the normalized identity and, server-side, into a table key.
+        /// </summary>
+        internal static string CutAtNul(string value)
+        {
+            if (value == null)
+                return null;
+            var nul = value.IndexOf('\0');
+            return nul < 0 ? value : value.Substring(0, nul);
+        }
+
         // -----------------------------------------------------------------------
         // HKU per-user profile enumeration
         // -----------------------------------------------------------------------

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Telemetry/Gather/GatherRuleExecutor.cs

@@ -827,11 +827,6 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Telemetry.Gather
             sb.Append(value);
         }
 
-        private EventSeverity ParseSeverity(string severity)
-        {
-            return GatherRuleContext.ParseSeverity(severity);
-        }
-
         private void StopAllTimers()
         {
             foreach (var timer in _intervalTimers.Values)

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Telemetry/Office/OfficeInstallDetector.cs

@@ -104,7 +104,6 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Telemetry.Office
         private bool _preinstalledReported; // office_preinstalled_detected already emitted (emit-once guard)
         private DateTime? _startedAtUtc;
         private string? _startedTrigger;
-        private OfficeDoSample? _lastDo;
         private OfficeDoSample? _peakDo; // highest-bytes sample seen — basis for the completed doSummary
 
         public OfficeInstallDetector(
@@ -252,7 +251,6 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Telemetry.Office
                     // _peakDo). The seed is persisted directly (it is the lifecycle's first DO sample).
                     if (_state == DetectorState.Active)
                     {
-                        _lastDo = sample;
                         _peakDo = sample;
                         PersistState(OfficeInstallStateData.StateActive);
                     }
@@ -261,7 +259,6 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Telemetry.Office
 
                 // Active: no progress event — the sample only updates the DO summary data. A grown
                 // peak is re-persisted (throttled) so a mid-install agent restart keeps the doSummary.
-                _lastDo = sample;
                 var peakGrew = _peakDo == null || sample.TotalBytesDownloaded > _peakDo.TotalBytesDownloaded;
                 if (peakGrew) _peakDo = sample;
                 if (peakGrew && _statePersistence != null
@@ -380,7 +377,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Telemetry.Office
             // wrapper that re-runs C2R) the watcher's initial scan completes the lifecycle synchronously.
             // Emitting started first guarantees the correct order (started → completed); otherwise a
             // pre-installed Office produced completed-before-started (field session a7525e97).
-            EmitLifecycle(Constants.EventTypes.OfficeInstallStarted, snap, EventSeverity.Info, PhaseOf(snap), isTerminal: false);
+            EmitLifecycle(Constants.EventTypes.OfficeInstallStarted, snap, EventSeverity.Info, InFlightPhase, isTerminal: false);
             // Persist Active BEFORE ObserveInstallationPath: when Office is already on disk the
             // host's binary watcher completes the lifecycle synchronously from inside that callback
             // (and persists Completed) — persisting Active afterwards would overwrite the terminal.
@@ -508,7 +505,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Telemetry.Office
 
         // StreamingFinished does not exist in the C2R registry, so the in-flight phase is reported as a
         // single "Installing"; the terminal completion uses "Completed".
-        private static string PhaseOf(OfficeC2RSnapshot snap) => "Installing";
+        private const string InFlightPhase = "Installing";
 
         // -----------------------------------------------------------------------
         // Payload

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Telemetry/Periodic/AgentSelfMetricsCollector.cs

@@ -215,6 +215,8 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Telemetry.Periodic
                         data["ime_verified_bytes"] = health.VerifiedBytes;
                         data["ime_pass_max_ms"] = health.PassMaxMs;
                         data["ime_pass_gap_max_ms"] = health.PassGapMaxMs;
+                        data["ime_platform_output_verified"] = health.PlatformOutputVerified;
+                        data["ime_platform_output_corrected"] = health.PlatformOutputCorrected;
                     }
                 }
                 catch (Exception ex)

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Telemetry/Periodic/NetworkChangeDetector.cs

@@ -26,7 +26,6 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Telemetry.Periodic
         private readonly string _tenantId;
         private readonly InformationalEventPost _post;
         private readonly AgentLogger _logger;
-        private readonly string _apiBaseUrl;
 
         private NetworkStateSnapshot _lastKnownState;
         private Timer _debounceTimer;
@@ -54,14 +53,12 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Telemetry.Periodic
             string sessionId,
             string tenantId,
             InformationalEventPost post,
-            AgentLogger logger,
-            string apiBaseUrl = null)
+            AgentLogger logger)
         {
             _sessionId = sessionId ?? throw new ArgumentNullException(nameof(sessionId));
             _tenantId = tenantId ?? throw new ArgumentNullException(nameof(tenantId));
             _post = post ?? throw new ArgumentNullException(nameof(post));
             _logger = logger ?? throw new ArgumentNullException(nameof(logger));
-            _apiBaseUrl = apiBaseUrl;
         }
 
         public void Start()
@@ -225,15 +222,9 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Telemetry.Periodic
         {
             if (_disposed || _connectivityCheckClient == null) return;
 
-            // Build endpoint list: static MDM endpoints + dynamic backend URL
+            // Static MDM endpoints only. The backend API stays out on purpose: enrollment does not
+            // need it, so its outage must not raise a connectivity alarm.
             var endpoints = new List<(string Name, string Url)>(MdmEndpoints);
-            // Optionally add the Autopilot Monitor API endpoint, but we don't want to cause false alarms if it's down or unreachable, 
-            // since it's not critical for enrollment success and may be available only after certain network changes (e.g. if it's behind a captive portal). 
-            // For now, we can omit it from the critical checks.
-            // if (!string.IsNullOrEmpty(_apiBaseUrl))
-            // {
-            //     endpoints.Add(("Autopilot Monitor API", _apiBaseUrl));
-            // }
 
             // Run all checks in parallel
             var tasks = endpoints.Select(ep => CheckEndpointAsync(ep.Name, ep.Url)).ToArray();

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Telemetry/Provisioning/ProvisioningPackageCollector.cs

@@ -69,20 +69,17 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Telemetry.Provisioning
         private readonly string _tenantId;
         private readonly InformationalEventPost _post;
         private readonly AgentLogger _logger;
-        private readonly IClock? _clock;
 
         public ProvisioningPackageCollector(
             string sessionId,
             string tenantId,
             InformationalEventPost post,
-            AgentLogger logger,
-            IClock? clock = null)
+            AgentLogger logger)
         {
             _sessionId = sessionId ?? throw new ArgumentNullException(nameof(sessionId));
             _tenantId = tenantId ?? throw new ArgumentNullException(nameof(tenantId));
             _post = post ?? throw new ArgumentNullException(nameof(post));
             _logger = logger ?? throw new ArgumentNullException(nameof(logger));
-            _clock = clock;
         }
 
         /// <summary>

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Transport/BackendApiClient.cs

@@ -284,7 +284,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Transport
         /// Throws <see cref="BackendAuthException"/> for 401/403 responses so callers can
         /// distinguish authentication failures from transient server errors.
         /// <para>
-        /// Field case (sits-d.cloud, 2026-08-09): a pre-cutover agent build pointed at a
+        /// Field case (2026-08-09): a pre-cutover agent build pointed at a
         /// retired Function App; Azure answers for a stopped app with a platform-level 403
         /// carrying an HTML error page ("Web App - Unavailable"). Our backend never returns
         /// HTML on 401/403 — an HTML body therefore means the response did not come from the

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Transport/EmergencyReporter.cs

@@ -2,6 +2,7 @@ using System;
 using System.Collections.Generic;
 using System.Threading.Tasks;
 using AutopilotMonitor.Agent.V2.Core.Logging;
+using AutopilotMonitor.DecisionCore.Engine;
 using AutopilotMonitor.Shared.Models;
 
 namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Transport
@@ -14,6 +15,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Transport
     ///   - Same error key (ErrorType + HTTP status code) is only ever sent once per session
     ///   - At most <see cref="MaxReportsPerSession"/> emergency reports total per session
     ///   - At most one report every <see cref="MinIntervalMinutes"/> minutes regardless of error type
+    ///     (the terminal <see cref="AgentErrorType.TelemetryRejectedSessionUnknown"/> report is exempt)
     ///
     /// A failure in this reporter is silently swallowed — it must never cascade into the main loop.
     /// </summary>
@@ -32,6 +34,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Transport
         private readonly string _tenantId;
         private readonly string _agentVersion;
         private readonly AgentLogger _logger;
+        private readonly IClock _clock;
 
         private readonly HashSet<string> _reportedKeys = new HashSet<string>();
         private readonly object _antiFloodLock = new object();
@@ -43,13 +46,15 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Transport
             string sessionId,
             string tenantId,
             string agentVersion,
-            AgentLogger logger)
+            AgentLogger logger,
+            IClock clock = null)
         {
             _apiClient = apiClient;
             _sessionId = sessionId;
             _tenantId = tenantId;
             _agentVersion = agentVersion;
             _logger = logger;
+            _clock = clock ?? SystemClock.Instance;
         }
 
         /// <summary>
@@ -100,6 +105,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Transport
             // All anti-flood checks are protected by a lock to prevent race conditions when
             // TrySendAsync is called concurrently (fire-and-forget from multiple threads).
             var key = $"{errorType}:{httpStatusCode}";
+            var now = _clock.UtcNow;
             int currentReportCount;
             DateTime? previousLastReportTime;
 
@@ -117,8 +123,13 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Transport
                     return;
                 }
 
-                if (_lastReportTime != null &&
-                    (DateTime.UtcNow - _lastReportTime.Value).TotalMinutes < MinIntervalMinutes)
+                // The session-unknown report is terminal and sent at most once per process (the
+                // termination follows immediately): a routine report minutes earlier must not cost
+                // the last word about the session. Only the cooldown is waived; key dedup and the
+                // per-session maximum still apply.
+                var exemptFromCooldown = errorType == AgentErrorType.TelemetryRejectedSessionUnknown;
+                if (!exemptFromCooldown && _lastReportTime != null &&
+                    (now - _lastReportTime.Value).TotalMinutes < MinIntervalMinutes)
                 {
                     _logger?.Debug($"[EmergencyChannel] Suppressed (cooldown active, last report at {_lastReportTime.Value:HH:mm:ss}): {key}");
                     return;
@@ -127,7 +138,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Transport
                 previousLastReportTime = _lastReportTime;
                 _reportedKeys.Add(key);
                 _reportCount++;
-                _lastReportTime = DateTime.UtcNow;
+                _lastReportTime = now;
                 currentReportCount = _reportCount;
             }
 
@@ -145,7 +156,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Transport
                 SessionAgeHours = sessionAgeHours,
                 PriorRegistrationFailure = priorRegistrationFailure,
                 AgentVersion = _agentVersion,
-                Timestamp = DateTime.UtcNow
+                Timestamp = now
             };
 
             var delivered = false;

src/Agent/AutopilotMonitor.Agent.V2.Core/Monitoring/Transport/NetworkLinkWait.cs

@@ -11,7 +11,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Monitoring.Transport
     /// signal once per second for at most <paramref name="maxWait"/>. It cannot prove backend
     /// reachability — the callers' retry loops handle that — it only keeps retry budgets from
     /// being burned into a link that is provably still down (BootTrigger relaunch after a
-    /// mid-enrollment reboot, Wi-Fi still associating; tenant aebdce78 audits 2026-08-23/24).
+    /// mid-enrollment reboot, Wi-Fi still associating; kiosk-tenant audits 2026-08-23/24).
     /// Free on the normal path — a live link returns immediately. Probe errors end the wait,
     /// never the caller's operation.
     /// </summary>

src/Agent/AutopilotMonitor.Agent.V2.Core/Orchestration/DefaultComponentFactory.cs

@@ -258,7 +258,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Orchestration
             // on esp_exiting events long after Start.
             ImeLogHost? imeLogHostRef = null;
 
-            // sits-d Cloud-PC fix (2026-08-19), narrowed after review: the Shell-Core ESP-exit
+            // Cloud-PC fix (2026-08-19), narrowed after review: the Shell-Core ESP-exit
             // replay is restart recovery, so it stays OFF on a first run and the happy path keeps
             // its pre-fix behaviour exactly. See ResolveEspExitBackfillLookbackMinutes.
             var espExitBackfillLookbackMinutes = ResolveEspExitBackfillLookbackMinutes(
@@ -377,8 +377,6 @@ namespace AutopilotMonitor.Agent.V2.Core.Orchestration
             if (analyzers.KeepAwakeDuringUserEsp)
             {
                 hosts.Add(new UserEspKeepAwakeHost(
-                    sessionId: sessionId,
-                    tenantId: tenantId,
                     ingress: ingress,
                     clock: clock,
                     logger: logger,
@@ -453,7 +451,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Orchestration
             imeLogHost.Tracker.OnUserTokenAcquired = lineUtc => aadJoinHost.NotifyUserTokenAcquired(lineUtc);
             imeLogHost.Tracker.OnTokenFailureLine = (code, lineUtc) => aadJoinHost.NotifyTokenFailureLine(code, lineUtc);
 
-            // sits-d Cloud-PC fix (2026-08-19): the user-apps-settled AccountSetup synthesis used
+            // Cloud-PC fix (2026-08-19): the user-apps-settled AccountSetup synthesis used
             // to run ONLY on the EspExited edge. On a tenant with a large required-app set the ESP
             // page exits while apps are still in flight, the single attempt misses, and nothing
             // ever re-checks — sessions 8110e262 / a89aac2d reached 138/138 apps with 0 failed and
@@ -524,14 +522,17 @@ namespace AutopilotMonitor.Agent.V2.Core.Orchestration
             // EspTrackingWin32Apps, StatusServiceReports) via snapshot-and-diff. Emits
             // registry_app_state on real changes and app_state_reconciliation when the
             // registry outcome diverges from the IME-log-derived state (= built-in pattern-drift
-            // alarm). Always-on observability host; the tracker probe is read-only.
+            // alarm). Always-on observability host; the tracker probe is read-only. Under the same
+            // root IME saves each platform script's result after reporting the batch: the script
+            // observer checks the tracker's emitted runs against it (script_output_reconciliation).
             hosts.Add(new ImeRegistryAppStateHost(
                 sessionId: sessionId,
                 tenantId: tenantId,
                 logger: logger,
                 ingress: ingress,
                 clock: clock,
-                trackerStateProbe: () => imeLogHost.AllKnownPackageStates));
+                trackerStateProbe: () => imeLogHost.AllKnownPackageStates,
+                scriptRuns: imeLogHost.Tracker.ScriptRuns));
 
             // Deterministic update corroboration — compares the persisted OS build (CurrentBuild.UBR)
             // across agent restarts and emits os_build_changed when it differs (session 7443317c:
@@ -645,8 +646,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Orchestration
                 tenantId: tenantId,
                 ingress: ingress,
                 clock: clock,
-                logger: logger,
-                apiBaseUrl: _agentConfig.ApiBaseUrl));
+                logger: logger));
 
             // Live AC/battery watcher — WMI Win32_PowerManagementEvent push (no polling), emits
             // power_state_change on AC↔battery transitions and 50/30/15 % downward threshold

src/Agent/AutopilotMonitor.Agent.V2.Core/Orchestration/EnrollmentOrchestrator.cs

@@ -371,8 +371,13 @@ namespace AutopilotMonitor.Agent.V2.Core.Orchestration
             // 3) Telemetry-Transport. Batch size flows from AgentConfiguration.MaxBatchSize
             //    via Program.cs (P1 fix: previously the remote-config knob was merged but
             //    never applied, so tenants saw drainInterval/MaxBatchSize have no effect).
-            _spool = new TelemetrySpool(_transportDirectory, _clock, _logger);
-            _transport = new TelemetryUploadOrchestrator(_spool, _uploader, _clock, batchSize: _uploadBatchSize);
+            //    The partition key names the registered session: the spool drops leftovers of a
+            //    previous session id on startup, and the orchestrator tells a 410 for this session
+            //    (SessionGone → host terminates) from a 410 for such leftovers (dropped).
+            var partitionKey = TelemetryPartitionKey.ForSession(_tenantId, _sessionId);
+            _spool = new TelemetrySpool(_transportDirectory, _clock, _logger, expectedPartitionKey: partitionKey);
+            _transport = new TelemetryUploadOrchestrator(
+                _spool, _uploader, _clock, batchSize: _uploadBatchSize, currentPartitionKey: partitionKey, logger: _logger);
 
             // TRACE-H1 — surface skipped oversized items + blocked-pipeline conditions as timeline
             // events. Raised after the drain guard releases, so posting back through the ingress

src/Agent/AutopilotMonitor.Agent.V2.Core/Orchestration/EnrollmentTerminatedEventArgs.cs

@@ -73,13 +73,23 @@ namespace AutopilotMonitor.Agent.V2.Core.Orchestration
         /// </summary>
         public string? StopReason { get; }
 
+        /// <summary>
+        /// The <c>origin</c> param of a server-requested <c>terminate_session</c> action
+        /// (<see cref="TerminationOrigins"/>); null for every termination the agent decided
+        /// itself. <see cref="TerminationOrigins.SessionGone"/> makes the termination handler
+        /// skip the spool drain and the diagnostics upload — the backend no longer knows the
+        /// session, so both could only fail.
+        /// </summary>
+        public string? Origin { get; }
+
         public EnrollmentTerminatedEventArgs(
             EnrollmentTerminationReason reason,
             EnrollmentTerminationOutcome outcome,
             string? stageName,
             DateTime terminatedAtUtc,
             string? details = null,
-            string? stopReason = null)
+            string? stopReason = null,
+            string? origin = null)
         {
             Reason = reason;
             Outcome = outcome;
@@ -87,6 +97,20 @@ namespace AutopilotMonitor.Agent.V2.Core.Orchestration
             TerminatedAtUtc = terminatedAtUtc;
             Details = details;
             StopReason = stopReason;
+            Origin = origin;
         }
     }
+
+    /// <summary>
+    /// Values of the <c>origin</c> param on a synthesised <c>terminate_session</c>
+    /// <c>ServerAction</c>, carried into <see cref="EnrollmentTerminatedEventArgs.Origin"/>.
+    /// </summary>
+    public static class TerminationOrigins
+    {
+        /// <summary>Administrator kill signal (<c>DeviceKillSignal</c> on a 2xx telemetry response).</summary>
+        public const string KillSignal = "kill_signal";
+
+        /// <summary>The backend answered HTTP 410 for the current session's telemetry.</summary>
+        public const string SessionGone = "session_gone";
+    }
 }

src/Agent/AutopilotMonitor.Agent.V2.Core/Orchestration/Hosts/DesktopArrivalHost.cs

@@ -18,7 +18,6 @@ namespace AutopilotMonitor.Agent.V2.Core.Orchestration
 
         private readonly DesktopArrivalDetector _detector;
         private readonly DesktopArrivalDetectorAdapter _adapter;
-        private readonly AgentLogger _logger;
         private int _disposed;
 
         public DesktopArrivalHost(
@@ -30,7 +29,6 @@ namespace AutopilotMonitor.Agent.V2.Core.Orchestration
             string? tenantId = null,
             Action<string>? onRealUserOwnerObserved = null)
         {
-            _logger = logger;
             _detector = new DesktopArrivalDetector(logger, noCandidateTimeoutMinutes);
             _adapter = new DesktopArrivalDetectorAdapter(_detector, ingress, clock);
 

src/Agent/AutopilotMonitor.Agent.V2.Core/Orchestration/Hosts/EspAndHelloHost.cs

@@ -118,7 +118,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Orchestration
         /// the Shell-Core watcher only ever saw events written AFTER <see cref="Start"/>. Any
         /// agent restart therefore lost an ESP exit (62407) or Hello-wizard start (62404) that
         /// happened while the agent was down — and after a mid-ESP reboot that is exactly the
-        /// window the completion signal lands in (sits-d Cloud PCs, 2026-08-19: five sessions
+        /// window the completion signal lands in (Cloud PCs, 2026-08-19: five sessions
         /// hung in AccountSetup until the server-side timeout while the devices were fine).
         /// </para>
         /// <para>
@@ -142,6 +142,11 @@ namespace AutopilotMonitor.Agent.V2.Core.Orchestration
         /// replayed 62407 cannot be placed in time; see
         /// <c>ShellCoreTracker.ReplayBackfillRecords</c>.
         /// </para>
+        /// <para>
+        /// The first run reads the last hour for the OOBE update page telemetry instead — no
+        /// replay, nothing that reaches the decision engine; see
+        /// <c>ShellCoreTracker.BackfillUpdatePageTelemetry</c>.
+        /// </para>
         /// </summary>
         public void Start()
         {
@@ -149,6 +154,8 @@ namespace AutopilotMonitor.Agent.V2.Core.Orchestration
 
             if (_espExitBackfillLookbackMinutes > 0)
                 _tracker.BackfillRecentHelloWizardStart(_espExitBackfillLookbackMinutes);
+            else
+                _tracker.BackfillUpdatePageTelemetry(ShellCoreTracker.UpdatePageBackfillLookbackMinutes);
         }
 
         public void Stop() => _tracker.Stop();

src/Agent/AutopilotMonitor.Agent.V2.Core/Orchestration/Hosts/ImeRegistryAppStateHost.cs

@@ -15,9 +15,10 @@ namespace AutopilotMonitor.Agent.V2.Core.Orchestration
 {
     /// <summary>
     /// Hosts the <see cref="ImeRegistryAppStateObserver"/> (registry second pillar, audit
-    /// 2026-08-17): one recursive <see cref="RegistryWatcher"/> on the IME root — all three
-    /// observed surfaces (Win32Apps, EspTrackingWin32Apps, SideCarPolicies\StatusServiceReports)
-    /// live under it — debounced into snapshot-and-diff ticks, plus a 60-s periodic fallback
+    /// 2026-08-17) and the <see cref="ImeRegistryScriptResultObserver"/> (D-316): one recursive
+    /// <see cref="RegistryWatcher"/> on the IME root — every observed surface (Win32Apps,
+    /// EspTrackingWin32Apps, SideCarPolicies\StatusServiceReports, Policies) lives under it —
+    /// debounced into snapshot-and-diff ticks, plus a 60-s periodic fallback
     /// tick. The fallback both evaluates the reconciliation settle-delay when the registry goes
     /// quiet AND keeps the pillar alive if the watcher fails to arm (poll-only degraded mode,
     /// announced once via <c>collector_degraded</c>). Always-on observability host, no config
@@ -31,6 +32,8 @@ namespace AutopilotMonitor.Agent.V2.Core.Orchestration
         private static readonly TimeSpan PeriodicInterval = TimeSpan.FromSeconds(60);
 
         private readonly ImeRegistryAppStateObserver _observer;
+        // Platform-script results under the same root (D-316); null when no run register was supplied.
+        private readonly ImeRegistryScriptResultObserver? _scriptObserver;
         private readonly InformationalEventPost _post;
         private readonly AgentLogger? _logger;
         private readonly string _sessionId;
@@ -47,7 +50,8 @@ namespace AutopilotMonitor.Agent.V2.Core.Orchestration
             AgentLogger? logger,
             ISignalIngressSink ingress,
             IClock clock,
-            Func<IReadOnlyList<AppPackageState>>? trackerStateProbe)
+            Func<IReadOnlyList<AppPackageState>>? trackerStateProbe,
+            PlatformScriptRunRegister? scriptRuns = null)
         {
             if (ingress == null) throw new ArgumentNullException(nameof(ingress));
             if (clock == null) throw new ArgumentNullException(nameof(clock));
@@ -56,6 +60,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Orchestration
             _logger = logger;
             _post = new InformationalEventPost(ingress, clock);
             _observer = new ImeRegistryAppStateObserver(_post, logger, clock, trackerStateProbe);
+            if (scriptRuns != null) _scriptObserver = new ImeRegistryScriptResultObserver(scriptRuns, _post, logger, clock);
         }
 
         public void Start()
@@ -63,6 +68,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Orchestration
             // Baseline immediately: pre-existing registry state must be captured silently
             // BEFORE the first change edge, or stale entries would replay as fresh events.
             _observer.Tick("baseline");
+            _scriptObserver?.Tick("baseline");
 
             try
             {
@@ -120,6 +126,7 @@ namespace AutopilotMonitor.Agent.V2.Core.Orchestration
             try
             {
                 _observer.Tick(reason);
+                _scriptObserver?.Tick(reason);
             }
             catch (Exception ex)
             {

src/Agent/AutopilotMonitor.Agent.V2.Core/Orchestration/Hosts/NetworkChangeHost.cs

@@ -26,14 +26,13 @@ namespace AutopilotMonitor.Agent.V2.Core.Orchestration
             string tenantId,
             ISignalIngressSink ingress,
             IClock clock,
-            AgentLogger logger,
-            string? apiBaseUrl)
+            AgentLogger logger)
         {
             if (ingress == null) throw new ArgumentNullException(nameof(ingress));
             if (clock == null) throw new ArgumentNullException(nameof(clock));
             _logger = logger;
             var post = new InformationalEventPost(ingress, clock);
-            _detector = new NetworkChangeDetector(sessionId, tenantId, post, logger, apiBaseUrl);
+            _detector = new NetworkChangeDetector(sessionId, tenantId, post, logger);
         }
 
         public void Start()