diff --git a/packaging/BuildMsix.ps1 b/packaging/BuildMsix.ps1
index 32d5baf..4fe0e3e 100644
--- a/packaging/BuildMsix.ps1
+++ b/packaging/BuildMsix.ps1
@@ -62,6 +62,14 @@ $msbuild = (& $vswhere -latest -find 'MSBuild\**\Bin\MSBuild.exe' | Select-Objec
 if (-not $msbuild) { throw 'MSBuild를 찾지 못했습니다.' }
 Write-Host "msbuild: $msbuild"
 
+# ---- 0) 회귀 게이트: 테스트 실패 시 publish/패키징 중단 ----
+# 적대적 리뷰의 '최후 방어선' — 회귀가 MSIX/서명까지 새는 것을 막는다.
+Write-Host ''
+Write-Host '[0/5] 테스트 게이트 (dotnet test)'
+$testProj = Join-Path $repoRoot 'src\Everything2Everything.Tests\Everything2Everything.Tests.csproj'
+& dotnet test $testProj -c $Configuration | Out-Host
+if ($LASTEXITCODE -ne 0) { throw '테스트 실패 — publish/패키징을 중단합니다. 회귀를 먼저 수정하세요.' }
+
 # ---- 1) .NET App publish ----
 Write-Host ''
 Write-Host '[1/5] .NET App publish'
diff --git a/src/Everything2Everything.Core/HistoryStore.cs b/src/Everything2Everything.Core/HistoryEntry.cs
similarity index 53%
rename from src/Everything2Everything.Core/HistoryStore.cs
rename to src/Everything2Everything.Core/HistoryEntry.cs
index 602d77e..8a3166b 100644
--- a/src/Everything2Everything.Core/HistoryStore.cs
+++ b/src/Everything2Everything.Core/HistoryEntry.cs
@@ -1,5 +1,3 @@
-using System.Collections.ObjectModel;
-
 namespace Everything2Everything.Core;
 
 public sealed record HistoryEntry(
@@ -20,21 +18,3 @@ public sealed record HistoryEntry(
 
     public string? PrimaryOutputPath => OutputPaths is { Count: > 0 } list ? list[0] : null;
 }
-
-public sealed class HistoryStore
-{
-    private readonly ObservableCollection<HistoryEntry> _entries = new();
-
-    public ReadOnlyObservableCollection<HistoryEntry> Entries { get; }
-
-    public HistoryStore()
-    {
-        Entries = new ReadOnlyObservableCollection<HistoryEntry>(_entries);
-    }
-
-    public void Add(HistoryEntry entry) => _entries.Insert(0, entry);
-
-    public void Clear() => _entries.Clear();
-
-    public int Count => _entries.Count;
-}