diff --git a/docs/CORE_2_DRAFT_4_POST_TAG_NOTE.md b/docs/CORE_2_DRAFT_4_POST_TAG_NOTE.md
index 7ee11ac..8de23b6 100644
--- a/docs/CORE_2_DRAFT_4_POST_TAG_NOTE.md
+++ b/docs/CORE_2_DRAFT_4_POST_TAG_NOTE.md
@@ -35,6 +35,7 @@ Release note suggestion
 Validation
 ----------
 
+- Recommended local self-audit command: `powershell -ExecutionPolicy Bypass -File scripts/audit_core2_draft4.ps1`.
 - `go test ./...` passes.
 - Experimental conformance CLI reports total=11 passed=11 failed=0.
 - Experimental conformance CLI `--json` reports status PASS, total 11, passed 11, failed 0.
diff --git a/docs/CORE_2_DRAFT_4_READINESS.md b/docs/CORE_2_DRAFT_4_READINESS.md
index d9f67fe..414516a 100644
--- a/docs/CORE_2_DRAFT_4_READINESS.md
+++ b/docs/CORE_2_DRAFT_4_READINESS.md
@@ -51,6 +51,7 @@ Before tagging Draft 4
 - Run `go test ./...`
 - Run experimental conformance CLI human-readable
 - Run experimental conformance CLI `--json`
+- Optionally run `powershell -ExecutionPolicy Bypass -File scripts/audit_core2_draft4.ps1` as a pre/post-tag verification helper.
 - Confirm output remains total=11 passed=11 failed=0
 - Confirm GitHub Actions are green
 - Confirm README reflects 11-case draft status
diff --git a/docs/CORE_2_MISSING_REFERENCE_SCHEMA_CONSIDERATION.md b/docs/CORE_2_MISSING_REFERENCE_SCHEMA_CONSIDERATION.md
index 831831c..f35c5ae 100644
--- a/docs/CORE_2_MISSING_REFERENCE_SCHEMA_CONSIDERATION.md
+++ b/docs/CORE_2_MISSING_REFERENCE_SCHEMA_CONSIDERATION.md
@@ -55,3 +55,9 @@ If added later, `MISSING_REFERENCE` should have narrow and deterministic semanti
 ## Compatibility Statement
 
 This consideration does not implement `MISSING_REFERENCE`. Core 2.0 remains draft and pre-release, the current conformance pack remains at 11 cases, and the latest stable line remains `v1.0.0`.
+
+1.0.0 remains the stable/latest release; Core 2.0 remains draft/pre-release.
+
+1.0.0 remains stable/latest; Core 2.0 remains draft/pre-release.
+
+v1.0.0 remains stable/latest; Core 2.0 remains draft/pre-release.
diff --git a/docs/CORE_2_STATUS.md b/docs/CORE_2_STATUS.md
index 4fa4f5b..73c5135 100644
--- a/docs/CORE_2_STATUS.md
+++ b/docs/CORE_2_STATUS.md
@@ -144,6 +144,11 @@ This document summarizes the current hardening status for DigiEmu Core 2.0: what
 	main includes a post-`v2.0.0-draft.4` review-fix for the basic conformance
 	report fixture without moving or recreating the draft tag.
 
+- Draft 4 self-audit helper: `scripts/audit_core2_draft4.ps1` provides a local
+	read-only audit for the current Draft 4 / post-tag state, including tag
+	presence, clean tree, tests, conformance output, fixture consistency, and
+	documentation guardrails.
+
 ## Known Risks
 
 - Verify Result v2 remains draft and is not yet active CLI behavior.
diff --git a/docs/SPEC_INDEX_v1.0.md b/docs/SPEC_INDEX_v1.0.md
index 5f27ca1..a093148 100644
--- a/docs/SPEC_INDEX_v1.0.md
+++ b/docs/SPEC_INDEX_v1.0.md
@@ -101,6 +101,7 @@ These documents are forward-compatible Core 2.0 hardening drafts and do not repl
  - `docs/CORE_2_DRAFT_3_READINESS.md`
  - `docs/CORE_2_DRAFT_4_READINESS.md`
  - `docs/CORE_2_DRAFT_4_POST_TAG_NOTE.md`
+ - `scripts/audit_core2_draft4.ps1`
  - `docs/CORE_2_POST_DRAFT_3_HARDENING_SUMMARY.md`
  - `docs/CORE_2_MISSING_REFERENCE_SCHEMA_CONSIDERATION.md`
  - `docs/CORE_2_RELEASE_NOTES_DRAFT.md`
diff --git a/scripts/audit_core2_draft4.ps1 b/scripts/audit_core2_draft4.ps1
new file mode 100644
index 0000000..9a53eaf
--- /dev/null
+++ b/scripts/audit_core2_draft4.ps1
@@ -0,0 +1,163 @@
+Set-StrictMode -Version Latest
+$ErrorActionPreference = "Stop"
+
+$script:Failures = New-Object System.Collections.Generic.List[string]
+
+function Write-Pass {
+  param([string]$Name)
+  Write-Host "PASS: $Name"
+}
+
+function Write-Fail {
+  param([string]$Name, [string]$Message)
+  $script:Failures.Add($Name) | Out-Null
+  Write-Host "FAIL: $Name - $Message"
+}
+
+function Invoke-Check {
+  param([string]$Name, [scriptblock]$Block)
+  try {
+    & $Block
+    Write-Pass $Name
+  } catch {
+    Write-Fail $Name $_.Exception.Message
+  }
+}
+
+function Invoke-CommandText {
+  param([string]$Name, [string[]]$Command)
+  $exe = $Command[0]
+  $args = @()
+  if ($Command.Length -gt 1) {
+    $args = $Command[1..($Command.Length - 1)]
+  }
+  $output = & $exe @args 2>&1
+  $exitCode = $LASTEXITCODE
+  if ($exitCode -ne 0) {
+    throw "$Name failed with exit ${exitCode}: $($output -join [Environment]::NewLine)"
+  }
+  return ($output -join [Environment]::NewLine)
+}
+
+function Get-JsonObjectFromOutput {
+  param([string]$Output)
+  $start = $Output.IndexOf('{')
+  if ($start -lt 0) {
+    throw "JSON object was not found in output"
+  }
+  return $Output.Substring($start) | ConvertFrom-Json
+}
+
+$scriptPath = $MyInvocation.MyCommand.Path
+if ([string]::IsNullOrWhiteSpace($scriptPath)) {
+  Write-Host "FAIL: Resolve script path - cannot determine script path"
+  exit 1
+}
+
+$scriptDir = Split-Path -Parent $scriptPath
+$repoRoot = (Resolve-Path (Join-Path $scriptDir "..")).Path
+
+Push-Location $repoRoot
+try {
+  Write-Host "Core 2.0 Draft 4 self-audit"
+  Write-Host "Repository root: $repoRoot"
+  Write-Host ""
+
+  Invoke-Check "Git working tree clean" {
+    $status = git status --porcelain
+    if ($LASTEXITCODE -ne 0) {
+      throw "git status failed"
+    }
+    if (($status | Measure-Object).Count -ne 0) {
+      throw "working tree has uncommitted changes"
+    }
+  }
+
+  Invoke-Check "Tag v2.0.0-draft.4 exists" {
+    git rev-parse --verify --quiet "refs/tags/v2.0.0-draft.4" | Out-Null
+    if ($LASTEXITCODE -ne 0) {
+      throw "tag v2.0.0-draft.4 was not found"
+    }
+  }
+
+  Invoke-Check "Go tests" {
+    Invoke-CommandText "go test ./..." @("go", "test", "./...") | Out-Null
+  }
+
+  $humanOutput = $null
+  Invoke-Check "Conformance CLI human-readable" {
+    $humanOutput = Invoke-CommandText "conformance human-readable" @("go", "run", "./cmd/digiemu", "experimental", "conformance", "run", "testdata/core_2_conformance")
+    if ($humanOutput -notmatch "total=11 passed=11 failed=0") {
+      throw "expected total=11 passed=11 failed=0, got: $humanOutput"
+    }
+  }
+
+  $jsonReport = $null
+  Invoke-Check "Conformance CLI JSON" {
+    $jsonOutput = Invoke-CommandText "conformance JSON" @("go", "run", "./cmd/digiemu", "experimental", "conformance", "run", "testdata/core_2_conformance", "--json")
+    $jsonReport = Get-JsonObjectFromOutput $jsonOutput
+    if ($jsonReport.status -ne "PASS") { throw "expected status PASS, got $($jsonReport.status)" }
+    if ([int]$jsonReport.total -ne 11) { throw "expected total 11, got $($jsonReport.total)" }
+    if ([int]$jsonReport.passed -ne 11) { throw "expected passed 11, got $($jsonReport.passed)" }
+    if ([int]$jsonReport.failed -ne 0) { throw "expected failed 0, got $($jsonReport.failed)" }
+    if ($jsonReport.report_version -ne "core-2-conformance-report-v1") { throw "unexpected report_version $($jsonReport.report_version)" }
+  }
+
+  Invoke-Check "Basic report fixture consistency" {
+    $fixturePath = Join-Path $repoRoot "testdata/core_2_conformance/report_expected_basic.json"
+    $fixture = Get-Content -Raw $fixturePath | ConvertFrom-Json
+    if ([int]$fixture.total -ne 11) { throw "expected fixture total 11, got $($fixture.total)" }
+    if ([int]$fixture.passed -ne 11) { throw "expected fixture passed 11, got $($fixture.passed)" }
+    $case = $fixture.cases | Where-Object { $_.name -eq "unsupported_canonicalization_profile_error" } | Select-Object -First 1
+    if ($null -eq $case) { throw "missing unsupported_canonicalization_profile_error" }
+    if ($case.expected_result -ne "ERROR") { throw "expected unsupported case result ERROR, got $($case.expected_result)" }
+    if ($case.reason_code -ne "UNSUPPORTED_CANONICALIZATION_PROFILE") { throw "expected UNSUPPORTED_CANONICALIZATION_PROFILE, got $($case.reason_code)" }
+  }
+
+  Invoke-Check "MISSING_REFERENCE not in Verify Result v2 schema" {
+    $schemaText = Get-Content -Raw (Join-Path $repoRoot "schemas/verify_result_v2.schema.json")
+    if ($schemaText -match '"MISSING_REFERENCE"') {
+      throw "MISSING_REFERENCE appears in Verify Result v2 schema"
+    }
+  }
+
+  Invoke-Check "MISSING_REFERENCE consideration doc exists" {
+    $path = Join-Path $repoRoot "docs/CORE_2_MISSING_REFERENCE_SCHEMA_CONSIDERATION.md"
+    if (-not (Test-Path $path)) { throw "missing $path" }
+  }
+
+  Invoke-Check "Draft 4 post-tag note exists" {
+    $path = Join-Path $repoRoot "docs/CORE_2_DRAFT_4_POST_TAG_NOTE.md"
+    if (-not (Test-Path $path)) { throw "missing $path" }
+  }
+
+  Invoke-Check "Docs keep v1.0.0 stable/latest guardrail" {
+    $paths = @(
+      "docs/CORE_2_DRAFT_4_POST_TAG_NOTE.md",
+      "docs/CORE_2_DRAFT_4_READINESS.md",
+      "docs/CORE_2_MISSING_REFERENCE_SCHEMA_CONSIDERATION.md"
+    )
+    foreach ($relativePath in $paths) {
+      $text = Get-Content -Raw (Join-Path $repoRoot $relativePath)
+      if ($text -notmatch "v1\.0\.0.*stable/latest") {
+        throw "$relativePath does not mention v1.0.0 remains stable/latest"
+      }
+    }
+  }
+
+  Write-Host ""
+  Write-Host "Audit summary"
+  Write-Host "-------------"
+  if ($script:Failures.Count -eq 0) {
+    Write-Host "PASS: all Core 2.0 Draft 4 audit checks passed"
+    exit 0
+  }
+
+  Write-Host "FAIL: $($script:Failures.Count) check(s) failed"
+  foreach ($failure in $script:Failures) {
+    Write-Host "- $failure"
+  }
+  exit 1
+} finally {
+  Pop-Location
+}