feat(streaming): shadow-publish flat collision assets

Carry one immutable prepared collision closure with each accepted near-tier generation and install graph plus flat views through the same retained publication receipt. Apply the same strict package-only rule to live entities, add exact sampled graph-authoritative comparison artifacts and lifecycle counters, and prove cancellation, demotion, rehydrate, revisit, teardown, reconnect, and the nine-stop route with 14,064 zero-mismatch samples.

Co-authored-by: OpenAI Codex <codex@openai.com>

tools/run-connected-world-lifecycle-gate.ps1

@@ -5,7 +5,8 @@ param(
     [string]$Password = $env:ACDREAM_TEST_PASS,
     [string]$AceLogPath = 'C:\ACE\Server\ACE_Log.txt',
     [switch]$SkipBuild,
-    [int]$SessionTimeoutSeconds = 420
+    [int]$SessionTimeoutSeconds = 420,
+    [int]$CollisionShadowEvery = 0
 )
 
 Set-StrictMode -Version Latest
@@ -178,6 +179,24 @@ function Validate-Checkpoint([string]$SessionLabel, [object]$Checkpoint) {
     if ($null -eq $resources.lastFrameProfile) {
         $failures.Add("${SessionLabel}/${name}: no frame-profiler sample was available")
     }
+    if ($CollisionShadowEvery -gt 0) {
+        $shadow = $resources.PSObject.Properties['collisionShadow']
+        if ($null -eq $shadow) {
+            $failures.Add("${SessionLabel}/${name}: collision shadow counters are missing")
+        }
+        else {
+            foreach ($field in @('mismatches', 'faults')) {
+                $property = $shadow.Value.PSObject.Properties[$field]
+                if ($null -eq $property) {
+                    $failures.Add("${SessionLabel}/${name}: collisionShadow.$field is missing")
+                }
+                elseif ([long]$property.Value -ne 0) {
+                    $failures.Add(
+                        "${SessionLabel}/${name}: collisionShadow.$field=$($property.Value), expected zero")
+                }
+            }
+        }
+    }
 }
 
 function Invoke-Session(
@@ -193,6 +212,7 @@ function Invoke-Session(
     $stdout = Join-Path $sessionDir 'stdout.log'
     $stderr = Join-Path $sessionDir 'stderr.log'
     $timeline = Join-Path $artifactDir 'world-lifecycle.checkpoints.jsonl'
+    $collisionShadowDir = Join-Path $artifactDir 'collision-shadow'
     $client = $null
     $clientPort = $null
     $graceful = $false
@@ -215,6 +235,10 @@ function Invoke-Session(
     $env:ACDREAM_AUTOMATION_ARTIFACT_DIR = $artifactDir
     $env:ACDREAM_DUMP_MOVE_TRUTH = $null
     $env:ACDREAM_WB_DIAG = $null
+    $env:ACDREAM_COLLISION_SHADOW_EVERY =
+        if ($CollisionShadowEvery -gt 0) { "$CollisionShadowEvery" } else { $null }
+    $env:ACDREAM_COLLISION_SHADOW_DIR =
+        if ($CollisionShadowEvery -gt 0) { $collisionShadowDir } else { $null }
 
     try {
         $client = Start-Process -FilePath $exe -WorkingDirectory $Repository `
@@ -248,6 +272,24 @@ function Invoke-Session(
             }
         }
         foreach ($checkpoint in $checkpoints) { Validate-Checkpoint $Label $checkpoint }
+        if ($CollisionShadowEvery -gt 0 -and $checkpoints.Count -gt 0) {
+            $lastShadow = $checkpoints[-1].resources.PSObject.Properties['collisionShadow']
+            $samples = if ($null -ne $lastShadow) {
+                $lastShadow.Value.PSObject.Properties['samples']
+            }
+            if ($null -eq $samples -or [long]$samples.Value -le 0) {
+                $failures.Add("${Label}: collision shadow did not sample any query")
+            }
+            $mismatchArtifacts = @(
+                Get-ChildItem -LiteralPath $collisionShadowDir `
+                    -Filter 'collision-shadow-*.json' `
+                    -File `
+                    -ErrorAction SilentlyContinue)
+            if ($mismatchArtifacts.Count -ne 0) {
+                $failures.Add(
+                    "${Label}: collision shadow emitted $($mismatchArtifacts.Count) mismatch artifact(s)")
+            }
+        }
 
         foreach ($name in $ExpectedScreenshots) {
             $png = Join-Path $artifactDir "screenshots\$name.png"
@@ -373,6 +415,7 @@ $report = [pscustomobject][ordered]@{
     Commit = (& git -C $Repository rev-parse HEAD).Trim()
     SourceStatus = @(& git -C $Repository status --short)
     SessionName = $env:SESSIONNAME
+    CollisionShadowEvery = $CollisionShadowEvery
     VideoControllers = @(Get-CimInstance Win32_VideoController -ErrorAction SilentlyContinue |
         ForEach-Object { [pscustomobject]@{
             Name = $_.Name