feat.PLONDS客户端补全

.github/workflows/plonds-uploader.yml

@@ -23,8 +23,8 @@ env:
   PLONDS_S3_PUBLIC_BASE_KEY_PREFIX: lanmountain/update
   PLONDS_S3_DIRECTORY_UPLOAD_CONCURRENCY: '4'
   PLONDS_S3_MULTIPART_THRESHOLD_MB: '8'
-  PLONDS_S3_MULTIPART_PART_SIZE_MB: '8'
-  PLONDS_S3_MULTIPART_CONCURRENCY: '4'
+  PLONDS_S3_MULTIPART_PART_SIZE_MB: '5'
+  PLONDS_S3_MULTIPART_CONCURRENCY: '8'
 
 jobs:
   publish:

.github/workflows/release.yml

@@ -360,7 +360,7 @@ jobs:
         run: |
           $version = "${{ needs.prepare.outputs.version }}"
           $arch = "${{ matrix.arch }}"
-          $payloadRoot = Join-Path (Join-Path $PWD "publish/windows-$arch") "app-$version"
+          $payloadRoot = Join-Path $PWD "publish/windows-$arch"
           if (-not (Test-Path $payloadRoot)) {
             Write-Error "Payload root not found: $payloadRoot"
             exit 1
@@ -374,7 +374,7 @@ jobs:
 
           Get-ChildItem -Path $payloadRoot -Recurse -File | ForEach-Object {
             $relative = [System.IO.Path]::GetRelativePath($payloadRoot, $_.FullName).Replace('\', '/')
-            if ($relative -eq '.current' -or $relative -eq '.partial' -or $relative -eq '.destroy' -or $relative.StartsWith('.current/') -or $relative.StartsWith('.partial/') -or $relative.StartsWith('.destroy/')) {
+            if ($relative -eq '.partial' -or $relative -eq '.destroy' -or $relative.StartsWith('.partial/') -or $relative.StartsWith('.destroy/')) {
               return
             }
 

LanMountainDesktop.Tests/PlondsClientServiceTests.cs

@@ -91,6 +91,25 @@ public sealed class PlondsClientServiceTests : IDisposable
         Assert.Contains("full package fallback also failed", result.ErrorMessage);
     }
 
+    [Fact]
+    public async Task DownloadPlanner_WhenManifestRequiresCleanInstall_DoesNotPreparePlondsPackage()
+    {
+        var downloader = new FakeDownloader(deltaFails: false, fullFails: false);
+        var planner = new PlondsDownloadPlanner(downloader);
+
+        var result = await planner.PrepareAsync(
+            new PlondsManifestCandidate(
+                new("s3", "s3", "https://s3.test/PLONDS.json"),
+                CreateManifest("1.2.3", requiresCleanInstall: true)),
+            CancellationToken.None);
+
+        Assert.False(result.Success);
+        Assert.True(result.RequiresUiHandling);
+        Assert.Contains("clean install", result.ErrorMessage);
+        Assert.Equal(0, downloader.DeltaCalls);
+        Assert.Equal(0, downloader.FullCalls);
+    }
+
     [Fact]
     public async Task PlondsService_ReadsBuiltInSources_RegistersManifestSources_AndPreparesHighestVersion()
     {
@@ -411,18 +430,62 @@ public sealed class PlondsClientServiceTests : IDisposable
         Assert.True(File.Exists(Path.Combine(currentDeployment, ".destroy")));
     }
 
+    [Fact]
+    public async Task PreparedPackageInstaller_InstallsFullPackageFromCompleteRootLayout()
+    {
+        var launcherRoot = Path.Combine(_tempRoot, "launcher-full");
+        var currentDeployment = Path.Combine(launcherRoot, "app-1.0.0-0");
+        Directory.CreateDirectory(currentDeployment);
+        File.WriteAllText(Path.Combine(currentDeployment, ".current"), string.Empty);
+        File.WriteAllText(Path.Combine(currentDeployment, "LanMountainDesktop.exe"), "old-exe");
+        File.WriteAllText(Path.Combine(currentDeployment, "app.dll"), "old");
+
+        var filesRoot = Path.Combine(_tempRoot, "Files-root");
+        var fullAppDirectory = Path.Combine(filesRoot, "app-1.2.0");
+        Directory.CreateDirectory(fullAppDirectory);
+        File.WriteAllText(Path.Combine(filesRoot, "LanMountainDesktop.Launcher.exe"), "launcher");
+        File.WriteAllText(Path.Combine(filesRoot, "LanMountainDesktop.AirAppRuntime.exe"), "runtime");
+        File.WriteAllText(Path.Combine(fullAppDirectory, ".current"), string.Empty);
+        File.WriteAllText(Path.Combine(fullAppDirectory, "LanMountainDesktop.exe"), "new-exe");
+        File.WriteAllText(Path.Combine(fullAppDirectory, "app.dll"), "new");
+
+        var package = new PlondsPreparedPackage(
+            new Version(1, 2, 0),
+            PlondsPackageMode.Full,
+            Path.Combine(_tempRoot, "PLONDS.json"),
+            null,
+            null,
+            Path.Combine(_tempRoot, "Files.zip"),
+            filesRoot);
+
+        var result = await new PlondsPreparedPackageInstaller().InstallAsync(
+            package,
+            launcherRoot,
+            progress: null,
+            CancellationToken.None);
+
+        Assert.True(result.Success);
+        var target = Assert.Single(Directory.GetDirectories(launcherRoot, "app-1.2.0-*"));
+        Assert.Equal("new-exe", File.ReadAllText(Path.Combine(target, "LanMountainDesktop.exe")));
+        Assert.Equal("new", File.ReadAllText(Path.Combine(target, "app.dll")));
+        Assert.False(File.Exists(Path.Combine(target, "LanMountainDesktop.Launcher.exe")));
+        Assert.True(File.Exists(Path.Combine(target, ".current")));
+        Assert.True(File.Exists(Path.Combine(currentDeployment, ".destroy")));
+    }
+
     private static PlondsClientManifest CreateManifest(
         string version,
         IReadOnlyList<PlondsSourceDescriptor>? sources = null,
         PlondsClientDownloads? downloads = null,
-        IReadOnlyDictionary<string, string>? checksums = null)
+        IReadOnlyDictionary<string, string>? checksums = null,
+        bool requiresCleanInstall = false)
     {
         return new PlondsClientManifest(
             FormatVersion: "2.0",
             CurrentVersion: version,
             PreviousVersion: "1.0.0",
             IsFullUpdate: false,
-            RequiresCleanInstall: false,
+            RequiresCleanInstall: requiresCleanInstall,
             Channel: "stable",
             Platform: "windows-x64",
             UpdatedAt: DateTimeOffset.Parse("2026-06-01T00:00:00Z"),

LanMountainDesktop.Tests/UpdateSettingsInterfaceTests.cs

@@ -140,6 +140,43 @@ public sealed class UpdateSettingsInterfaceTests
         Assert.False(orchestratorCreated);
     }
 
+    [Fact]
+    public async Task UpdateSettingsService_WhenPlondsManifestRequiresCleanInstall_ReportsFullInstaller()
+    {
+        var settings = new FakeSettingsService
+        {
+            Snapshot =
+            {
+                UpdateDownloadSource = UpdateSettingsValues.DownloadSourcePlonds
+            }
+        };
+        var plonds = new FakePlondsService
+        {
+            LatestResult = PlondsLatestResult.Available(
+                new Version(1, 0, 0),
+                new Version(9, 9, 9),
+                [new PlondsManifestCandidate(
+                    new PlondsSourceDescriptor("s3", "s3", "https://s3.test/PLONDS.json", 100),
+                    CreatePlondsManifest("9.9.9", requiresCleanInstall: true))])
+        };
+        var orchestratorCreated = false;
+        var service = new UpdateSettingsService(
+            settings,
+            orchestratorFactory: () =>
+            {
+                orchestratorCreated = true;
+                throw new InvalidOperationException("UpdateOrchestrator should not be created for PLONDS check.");
+            },
+            plondsService: plonds);
+
+        var report = await service.CheckAsync(CancellationToken.None);
+
+        Assert.True(report.IsUpdateAvailable);
+        Assert.Equal(UpdatePayloadKind.FullInstaller, report.PayloadKind);
+        Assert.Equal("9.9.9", report.LatestVersion);
+        Assert.False(orchestratorCreated);
+    }
+
     [Fact]
     public async Task UpdateSettingsService_WhenGitHubSelected_UsesOrchestrator()
     {
@@ -226,14 +263,14 @@ public sealed class UpdateSettingsInterfaceTests
             new UpdateStateStore(new FakeSettingsFacade(new FakeUpdateSettingsService { State = state })));
     }
 
-    private static PlondsClientManifest CreatePlondsManifest(string version)
+    private static PlondsClientManifest CreatePlondsManifest(string version, bool requiresCleanInstall = false)
     {
         return new PlondsClientManifest(
             FormatVersion: "2.0",
             CurrentVersion: version,
             PreviousVersion: "1.0.0",
             IsFullUpdate: false,
-            RequiresCleanInstall: false,
+            RequiresCleanInstall: requiresCleanInstall,
             Channel: "stable",
             Platform: "windows-x64",
             UpdatedAt: DateTimeOffset.Parse("2026-06-01T00:00:00Z"),

LanMountainDesktop/Services/Plonds/PlondsDownloadPlanner.cs

@@ -8,6 +8,12 @@ internal sealed class PlondsDownloadPlanner(IPlondsPackageDownloader downloader)
     {
         ArgumentNullException.ThrowIfNull(candidate);
 
+        if (candidate.Manifest.RequiresCleanInstall)
+        {
+            return PlondsPrepareResult.FailedForUi(
+                "PLONDS manifest requires a clean install. Use the Host Update installer flow instead.");
+        }
+
         try
         {
             var deltaPackage = await downloader

LanMountainDesktop/Services/Plonds/PlondsPreparedPackageInstaller.cs

@@ -55,12 +55,13 @@ internal sealed class PlondsPreparedPackageInstaller
             return new PlondsInstallResult(false, "PLONDS full package directory is missing.", "staging_incomplete");
         }
 
+        var sourceAppDirectory = ResolveFullPackageAppDirectory(package.FilesDirectory, package.Version);
         var currentDeployment = FindCurrentDeploymentDirectory(launcherRoot);
         var targetDeployment = BuildNextDeploymentDirectory(launcherRoot, package.Version.ToString());
 
         progress?.Report(new InstallProgressReport(InstallStage.CreateTarget, "Creating target deployment...", 15, null, 0, 0));
         PrepareTargetDirectory(targetDeployment);
-        CopyDirectory(package.FilesDirectory, targetDeployment, cancellationToken);
+        CopyDirectory(sourceAppDirectory, targetDeployment, cancellationToken, skipMarkers: true);
 
         progress?.Report(new InstallProgressReport(InstallStage.ActivateDeployment, "Activating deployment...", 85, null, 0, 0));
         ActivateDeployment(currentDeployment, targetDeployment);
@@ -288,6 +289,40 @@ internal sealed class PlondsPreparedPackageInstaller
             .FirstOrDefault();
     }
 
+    private static string ResolveFullPackageAppDirectory(string filesDirectory, Version version)
+    {
+        var resolvedRoot = Path.GetFullPath(filesDirectory);
+        if (File.Exists(Path.Combine(resolvedRoot, "LanMountainDesktop.exe")))
+        {
+            return resolvedRoot;
+        }
+
+        var exactAppDirectory = Path.Combine(resolvedRoot, $"app-{version}");
+        if (Directory.Exists(exactAppDirectory) &&
+            File.Exists(Path.Combine(exactAppDirectory, "LanMountainDesktop.exe")))
+        {
+            return exactAppDirectory;
+        }
+
+        var appDirectory = Directory.GetDirectories(resolvedRoot, "app-*", SearchOption.TopDirectoryOnly)
+            .Where(path => File.Exists(Path.Combine(path, "LanMountainDesktop.exe")))
+            .Select(path => new
+            {
+                Path = path,
+                Version = ParseVersionFromDirectory(path)
+            })
+            .OrderByDescending(item => item.Version)
+            .Select(item => item.Path)
+            .FirstOrDefault();
+
+        if (!string.IsNullOrWhiteSpace(appDirectory))
+        {
+            return appDirectory;
+        }
+
+        throw new DirectoryNotFoundException("PLONDS full package does not contain an app deployment directory.");
+    }
+
     private static string BuildNextDeploymentDirectory(string launcherRoot, string targetVersion)
     {
         Directory.CreateDirectory(launcherRoot);

LanMountainDesktop/Services/Settings/SettingsDomainServices.cs

@@ -791,8 +791,11 @@ internal sealed class UpdateSettingsService : IUpdateSettingsService, IDisposabl
     private readonly GitHubReleaseUpdateService _githubReleaseUpdateService = new("wwiinnddyy", "LanMountainDesktop");
     private readonly IPlondsService _plondsService;
     private readonly PlondsPreparedPackageInstaller _plondsInstaller = new();
+    private readonly UpdateInstallGateway _plondsUpdateInstallGateway = new();
     private readonly Lazy<UpdateOrchestrator> _orchestrator;
     private PlondsLatestResult? _pendingPlondsLatest;
+    private PlondsManifestCandidate? _pendingPlondsCleanInstallCandidate;
+    private UpdateManifest? _pendingPlondsInstallerManifest;
     private PlondsPreparedPackage? _pendingPlondsPackage;
     private UpdatePhase _plondsPhase = UpdatePhase.Idle;
     private bool _orchestratorEventsSubscribed;
@@ -957,6 +960,8 @@ internal sealed class UpdateSettingsService : IUpdateSettingsService, IDisposabl
         if (IsPlondsSelected())
         {
             _pendingPlondsLatest = null;
+            _pendingPlondsCleanInstallCandidate = null;
+            _pendingPlondsInstallerManifest = null;
             _pendingPlondsPackage = null;
             TransitionPlonds(UpdatePhase.Idle);
             return Task.CompletedTask;
@@ -979,7 +984,7 @@ internal sealed class UpdateSettingsService : IUpdateSettingsService, IDisposabl
     {
         if (IsPlondsSelected())
         {
-            return false;
+            return TryApplyPlondsOnExit();
         }
 
         return GetOrchestrator().TryApplyOnExit();
@@ -1087,6 +1092,9 @@ internal sealed class UpdateSettingsService : IUpdateSettingsService, IDisposabl
 
         var latest = await _plondsService.FindLatestAsync(currentVersion, cancellationToken).ConfigureAwait(false);
         _pendingPlondsLatest = latest.Success && latest.IsUpdateAvailable ? latest : null;
+        _pendingPlondsCleanInstallCandidate = _pendingPlondsLatest?.Candidates
+            .FirstOrDefault(candidate => candidate.Manifest.RequiresCleanInstall);
+        _pendingPlondsInstallerManifest = null;
         _pendingPlondsPackage = null;
         TransitionPlonds(UpdatePhase.Checked);
         SaveLastChecked();
@@ -1096,11 +1104,17 @@ internal sealed class UpdateSettingsService : IUpdateSettingsService, IDisposabl
             return new UpdateCheckReport(false, null, currentVersionText, null, null, null, null, null, null, latest.ErrorMessage);
         }
 
+        var payloadKind = latest.IsUpdateAvailable
+            ? _pendingPlondsCleanInstallCandidate is not null
+                ? UpdatePayloadKind.FullInstaller
+                : UpdatePayloadKind.DeltaPlonds
+            : (UpdatePayloadKind?)null;
+
         return new UpdateCheckReport(
             latest.IsUpdateAvailable,
             latest.LatestVersion?.ToString(),
             currentVersionText,
-            latest.IsUpdateAvailable ? UpdatePayloadKind.DeltaPlonds : null,
+            payloadKind,
             latest.Candidates.FirstOrDefault()?.Source.Id,
             Get().UpdateChannel,
             DateTimeOffset.UtcNow,
@@ -1111,7 +1125,7 @@ internal sealed class UpdateSettingsService : IUpdateSettingsService, IDisposabl
 
     private async Task<LanMountainDesktop.Services.Update.DownloadResult> DownloadPlondsAsync(CancellationToken cancellationToken)
     {
-        if (_plondsPhase is not UpdatePhase.Checked)
+        if (_plondsPhase is not (UpdatePhase.Checked or UpdatePhase.PausedDownloading))
         {
             return new LanMountainDesktop.Services.Update.DownloadResult(false, null, $"Cannot download in phase {_plondsPhase}.", false);
         }
@@ -1121,8 +1135,13 @@ internal sealed class UpdateSettingsService : IUpdateSettingsService, IDisposabl
             return new LanMountainDesktop.Services.Update.DownloadResult(false, null, "No PLONDS update is pending.", false);
         }
 
-        TransitionPlonds(UpdatePhase.Downloading);
         var currentVersion = _pendingPlondsLatest.CurrentVersion;
+        if (_pendingPlondsCleanInstallCandidate is not null)
+        {
+            return await DownloadPlondsCleanInstallAsync(_pendingPlondsCleanInstallCandidate, cancellationToken).ConfigureAwait(false);
+        }
+
+        TransitionPlonds(UpdatePhase.Downloading);
         var result = await _plondsService.FindAndPrepareLatestAsync(currentVersion, cancellationToken).ConfigureAwait(false);
         if (!result.Success || result.Package is null)
         {
@@ -1136,6 +1155,95 @@ internal sealed class UpdateSettingsService : IUpdateSettingsService, IDisposabl
         return new LanMountainDesktop.Services.Update.DownloadResult(true, result.Package.ManifestPath, null, true);
     }
 
+    private async Task<LanMountainDesktop.Services.Update.DownloadResult> DownloadPlondsCleanInstallAsync(
+        PlondsManifestCandidate candidate,
+        CancellationToken cancellationToken)
+    {
+        TransitionPlonds(UpdatePhase.Downloading);
+
+        var manifest = await ResolveGitHubInstallerManifestForPlondsAsync(candidate.Manifest, cancellationToken).ConfigureAwait(false);
+        if (manifest is null)
+        {
+            TransitionPlonds(UpdatePhase.Failed);
+            return new LanMountainDesktop.Services.Update.DownloadResult(
+                false,
+                null,
+                $"PLONDS {candidate.Manifest.CurrentVersion} requires clean install, but no matching GitHub installer release was found.",
+                false);
+        }
+
+        var mirror = manifest.InstallerMirrors?
+            .FirstOrDefault(item => !string.IsNullOrWhiteSpace(item.Url));
+        if (mirror is null || string.IsNullOrWhiteSpace(mirror.Url))
+        {
+            TransitionPlonds(UpdatePhase.Failed);
+            return new LanMountainDesktop.Services.Update.DownloadResult(
+                false,
+                null,
+                $"PLONDS {candidate.Manifest.CurrentVersion} requires clean install, but GitHub release has no usable installer asset.",
+                false);
+        }
+
+        var fileName = string.IsNullOrWhiteSpace(mirror.Name)
+            ? $"{manifest.DistributionId}-{manifest.ToVersion}-installer.exe"
+            : mirror.Name!;
+        var asset = new GitHubReleaseAsset(fileName, mirror.Url!, mirror.Size, mirror.Sha256);
+        var destinationPath = CreateInstallerDestinationPath(manifest, fileName);
+        var maxThreads = UpdateSettingsValues.NormalizeDownloadThreads(Get().UpdateDownloadThreads);
+        var progress = new Progress<double>(fraction =>
+        {
+            var downloadReport = new DownloadProgressReport(
+                fileName,
+                0,
+                Math.Max(0, mirror.Size),
+                0,
+                fraction >= 1 ? 1 : 0,
+                1,
+                Math.Clamp(fraction, 0, 1));
+
+            _progressChanged?.Invoke(new UpdateProgressReport(
+                UpdatePhase.Downloading,
+                $"Downloading {fileName}",
+                Math.Clamp(fraction, 0, 1),
+                downloadReport,
+                null));
+        });
+
+        var result = await _githubReleaseUpdateService.DownloadAssetAsync(
+                asset,
+                destinationPath,
+                UpdateSettingsValues.DownloadSourceGitHub,
+                maxThreads,
+                progress,
+                cancellationToken)
+            .ConfigureAwait(false);
+
+        if (!result.Success || string.IsNullOrWhiteSpace(result.FilePath))
+        {
+            TransitionPlonds(UpdatePhase.Failed);
+            return new LanMountainDesktop.Services.Update.DownloadResult(
+                false,
+                result.FilePath,
+                result.ErrorMessage ?? "Failed to download GitHub installer for PLONDS clean install.",
+                result.HashVerified);
+        }
+
+        var launcherRoot = UpdatePaths.ResolveLauncherRoot(AppContext.BaseDirectory);
+        DeploymentLockService.WriteLock(launcherRoot, new DeploymentLock(
+            SchemaVersion: 1,
+            Kind: "full",
+            TargetVersion: manifest.ToVersion,
+            PayloadPath: result.FilePath,
+            PayloadSha256: result.ExpectedHash,
+            CreatedAtUtc: DateTimeOffset.UtcNow));
+
+        _pendingPlondsInstallerManifest = manifest;
+        _pendingPlondsPackage = null;
+        TransitionPlonds(UpdatePhase.Downloaded);
+        SavePendingPlondsInstaller(manifest, result.FilePath, result.ExpectedHash);
+        return new LanMountainDesktop.Services.Update.DownloadResult(true, result.FilePath, null, result.HashVerified);
+    }
+
     private Task PausePlondsAsync()
     {
         if (_plondsPhase.CanPause())
@@ -1160,6 +1268,11 @@ internal sealed class UpdateSettingsService : IUpdateSettingsService, IDisposabl
             return new InstallResult(false, $"Cannot install in phase {_plondsPhase}.", false, "invalid_phase");
         }
 
+        if (_pendingPlondsInstallerManifest is not null)
+        {
+            return await InstallPlondsCleanInstallAsync(cancellationToken).ConfigureAwait(false);
+        }
+
         if (_pendingPlondsPackage is null)
         {
             return new InstallResult(false, "No PLONDS package has been prepared.", false, "staging_incomplete");
@@ -1188,6 +1301,37 @@ internal sealed class UpdateSettingsService : IUpdateSettingsService, IDisposabl
         return new InstallResult(true, null, false);
     }
 
+    private async Task<InstallResult> InstallPlondsCleanInstallAsync(CancellationToken cancellationToken)
+    {
+        TransitionPlonds(UpdatePhase.Installing);
+        var launcherRoot = UpdatePaths.ResolveLauncherRoot(AppContext.BaseDirectory);
+        var progress = new Progress<InstallProgressReport>(report =>
+        {
+            _progressChanged?.Invoke(new UpdateProgressReport(
+                UpdatePhase.Installing,
+                report.Message,
+                report.ProgressPercent / 100.0,
+                null,
+                report));
+        });
+
+        var install = await _plondsUpdateInstallGateway.InstallAsync(
+                UpdatePayloadKind.FullInstaller,
+                launcherRoot,
+                progress,
+                cancellationToken)
+            .ConfigureAwait(false);
+
+        if (!install.Success)
+        {
+            TransitionPlonds(UpdatePhase.Failed);
+            return install;
+        }
+
+        TransitionPlonds(UpdatePhase.Installed);
+        return install;
+    }
+
     private async Task AutoCheckPlondsIfEnabledAsync(CancellationToken cancellationToken)
     {
         var settings = Get();
@@ -1269,6 +1413,160 @@ internal sealed class UpdateSettingsService : IUpdateSettingsService, IDisposabl
         });
     }
 
+    private void SavePendingPlondsInstaller(UpdateManifest manifest, string installerPath, string? sha256)
+    {
+        var state = Get();
+        Save(state with
+        {
+            PendingUpdateInstallerPath = installerPath,
+            PendingUpdateVersion = manifest.ToVersion,
+            PendingUpdatePublishedAtUtcMs = manifest.PublishedAt.ToUnixTimeMilliseconds(),
+            PendingUpdateSha256 = string.IsNullOrWhiteSpace(sha256) ? null : sha256.Trim().ToLowerInvariant(),
+            LastUpdateCheckUtcMs = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds()
+        });
+    }
+
+    private bool TryApplyPlondsOnExit()
+    {
+        var settings = Get();
+        if (!string.Equals(
+                UpdateSettingsValues.NormalizeMode(settings.UpdateMode),
+                UpdateSettingsValues.ModeSilentOnExit,
+                StringComparison.OrdinalIgnoreCase))
+        {
+            return false;
+        }
+
+        var launcherRoot = UpdatePaths.ResolveLauncherRoot(AppContext.BaseDirectory);
+        try
+        {
+            if (_pendingPlondsPackage is not null)
+            {
+                AppLogger.Info("UpdateWorkflow", "PLONDS package pending. Applying from Host on exit.");
+                var result = _plondsInstaller.InstallAsync(
+                        _pendingPlondsPackage,
+                        launcherRoot,
+                        progress: null,
+                        CancellationToken.None)
+                    .GetAwaiter()
+                    .GetResult();
+                return result.Success;
+            }
+
+            var deploymentLock = DeploymentLockService.ReadLock(launcherRoot);
+            if (!string.Equals(deploymentLock?.Kind, "full", StringComparison.OrdinalIgnoreCase))
+            {
+                return false;
+            }
+
+            if (string.IsNullOrWhiteSpace(settings.PendingUpdateInstallerPath) ||
+                !File.Exists(settings.PendingUpdateInstallerPath))
+            {
+                return false;
+            }
+
+            AppLogger.Info("UpdateWorkflow", "PLONDS clean-install installer pending. Launching from Host Update on exit.");
+            var install = _plondsUpdateInstallGateway.InstallAsync(
+                    UpdatePayloadKind.FullInstaller,
+                    launcherRoot,
+                    progress: null,
+                    CancellationToken.None)
+                .GetAwaiter()
+                .GetResult();
+            return install.Success;
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn("UpdateWorkflow", "Failed to apply pending PLONDS update on exit.", ex);
+            return false;
+        }
+    }
+
+    private async Task<UpdateManifest?> ResolveGitHubInstallerManifestForPlondsAsync(
+        PlondsClientManifest plondsManifest,
+        CancellationToken cancellationToken)
+    {
+        foreach (var tag in BuildReleaseTagCandidates(plondsManifest.CurrentVersion))
+        {
+            try
+            {
+                var release = await _githubReleaseUpdateService
+                    .GetReleaseByTagAsync(tag, cancellationToken)
+                    .ConfigureAwait(false);
+                if (release is null)
+                {
+                    continue;
+                }
+
+                return UpdateManifestMapper.FromFullInstaller(release, Get().UpdateChannel, ResolveCurrentPlatform());
+            }
+            catch (OperationCanceledException)
+            {
+                throw;
+            }
+            catch (Exception ex)
+            {
+                AppLogger.Warn("UpdateWorkflow", $"Failed to resolve GitHub installer release '{tag}' for PLONDS clean install: {ex.Message}");
+            }
+        }
+
+        return null;
+    }
+
+    private static IEnumerable<string> BuildReleaseTagCandidates(string? version)
+    {
+        if (string.IsNullOrWhiteSpace(version))
+        {
+            yield break;
+        }
+
+        var trimmed = version.Trim();
+        if (trimmed.StartsWith("v", StringComparison.OrdinalIgnoreCase))
+        {
+            yield return trimmed;
+            yield return trimmed[1..];
+            yield break;
+        }
+
+        yield return $"v{trimmed}";
+        yield return trimmed;
+    }
+
+    private static string CreateInstallerDestinationPath(UpdateManifest manifest, string fileName)
+    {
+        var safeFileName = string.Join(
+            "_",
+            fileName.Split(Path.GetInvalidFileNameChars(), StringSplitOptions.RemoveEmptyEntries)).Trim();
+        if (string.IsNullOrWhiteSpace(safeFileName))
+        {
+            safeFileName = $"{manifest.DistributionId}-{manifest.ToVersion}-installer.exe";
+        }
+
+        return Path.Combine(
+            Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
+            "LanMountainDesktop",
+            "Updates",
+            safeFileName);
+    }
+
+    private static string ResolveCurrentPlatform()
+    {
+        var os = OperatingSystem.IsWindows()
+            ? "windows"
+            : OperatingSystem.IsLinux()
+                ? "linux"
+                : OperatingSystem.IsMacOS()
+                    ? "macos"
+                    : "unknown";
+        var arch = System.Runtime.InteropServices.RuntimeInformation.OSArchitecture switch
+        {
+            System.Runtime.InteropServices.Architecture.Arm64 => "arm64",
+            System.Runtime.InteropServices.Architecture.X86 => "x86",
+            _ => "x64"
+        };
+        return $"{os}-{arch}";
+    }
+
     private static bool TryParseVersion(string? value, out Version version)
     {
         version = new Version(0, 0, 0);

LanMountainDesktop/Services/Update/UpdateInstallGateway.cs

@@ -31,7 +31,7 @@ internal sealed class UpdateInstallGateway
                 0,
                 0));
 
-            if (!VerifyDeploymentLock(payloadKind, launcherRoot, out var lockErrorCode, out var lockError))
+            if (!VerifyDeploymentLock(payloadKind, launcherRoot, out var deploymentLock, out var lockErrorCode, out var lockError))
             {
                 return new InstallResult(false, lockError, false, lockErrorCode);
             }
@@ -59,7 +59,7 @@ internal sealed class UpdateInstallGateway
                 return new InstallResult(true, null, false);
             }
 
-            var installerPath = FindPendingInstaller(launcherRoot, payloadKind, ct);
+            var installerPath = FindPendingInstaller(launcherRoot, deploymentLock!, ct);
             if (installerPath is null)
             {
                 return new InstallResult(false, "No pending installer found.", false, "staging_incomplete");
@@ -92,19 +92,25 @@ internal sealed class UpdateInstallGateway
         }
     }
 
-    private static bool VerifyDeploymentLock(UpdatePayloadKind payloadKind, string launcherRoot, out string? errorCode, out string? error)
+    private static bool VerifyDeploymentLock(
+        UpdatePayloadKind payloadKind,
+        string launcherRoot,
+        out DeploymentLock? deploymentLock,
+        out string? errorCode,
+        out string? error)
     {
+        deploymentLock = null;
         errorCode = null;
         error = null;
-        var deploymentLock = DeploymentLockService.ReadLock(launcherRoot);
-        if (deploymentLock is null)
+        var currentLock = DeploymentLockService.ReadLock(launcherRoot);
+        if (currentLock is null)
         {
             errorCode = "lock_conflict";
             error = "Deployment lock is missing. Please redownload the update.";
             return false;
         }
 
-        if (deploymentLock.SchemaVersion != 1)
+        if (currentLock.SchemaVersion != 1)
         {
             errorCode = "lock_conflict";
             error = "Deployment lock schema is unsupported. Please redownload the update.";
@@ -112,22 +118,23 @@ internal sealed class UpdateInstallGateway
         }
 
         var expectedKind = payloadKind is UpdatePayloadKind.DeltaPlonds ? "delta" : "full";
-        if (!string.Equals(deploymentLock.Kind, expectedKind, StringComparison.OrdinalIgnoreCase))
+        if (!string.Equals(currentLock.Kind, expectedKind, StringComparison.OrdinalIgnoreCase))
         {
             errorCode = "lock_conflict";
             error = "Deployment lock payload type mismatch. Please redownload the update.";
             return false;
         }
 
-        if (string.IsNullOrWhiteSpace(deploymentLock.PayloadPath) ||
-            !File.Exists(deploymentLock.PayloadPath) &&
-            !Directory.Exists(deploymentLock.PayloadPath))
+        if (string.IsNullOrWhiteSpace(currentLock.PayloadPath) ||
+            !File.Exists(currentLock.PayloadPath) &&
+            !Directory.Exists(currentLock.PayloadPath))
         {
             errorCode = "staging_incomplete";
             error = "Deployment lock payload path is missing. Please redownload the update.";
             return false;
         }
 
+        deploymentLock = currentLock;
         return true;
     }
 
@@ -240,10 +247,17 @@ internal sealed class UpdateInstallGateway
         }
     }
 
-    private static string? FindPendingInstaller(string launcherRoot, UpdatePayloadKind payloadKind, CancellationToken ct)
+    private static string? FindPendingInstaller(string launcherRoot, DeploymentLock deploymentLock, CancellationToken ct)
     {
         ct.ThrowIfCancellationRequested();
 
+        if (!string.IsNullOrWhiteSpace(deploymentLock.PayloadPath) &&
+            File.Exists(deploymentLock.PayloadPath) &&
+            Path.GetExtension(deploymentLock.PayloadPath).Equals(".exe", StringComparison.OrdinalIgnoreCase))
+        {
+            return deploymentLock.PayloadPath;
+        }
+
         var incomingDir = UpdatePaths.GetIncomingDirectory(launcherRoot);
         if (!Directory.Exists(incomingDir))
         {

PenguinLogisticsOnlineNetworkDistributionSystem/src/Plonds.Core/Publishing/PlondsCommitDeltaBuilder.cs

@@ -55,6 +55,7 @@ public sealed class PlondsCommitDeltaBuilder
 
         Directory.CreateDirectory(outputRoot);
         PayloadUtilities.ExtractZip(currentPayloadZip, currentExtractRoot);
+        var currentAppRoot = PlondsDeltaBuilder.ResolvePayloadAppRoot(currentExtractRoot, options.CurrentVersion);
 
         var changedSourceFiles = GetChangedSourceFiles(options.BaselineTag, options.CurrentTag, sourceDirs);
 
@@ -76,7 +77,7 @@ public sealed class PlondsCommitDeltaBuilder
         }
 
         var artifactFiles = MapSourceToArtifacts(changedSourceFiles, sourceDirs);
-        var currentManifest = PayloadUtilities.ScanDirectory(currentExtractRoot);
+        var currentManifest = PayloadUtilities.ScanDirectory(currentAppRoot);
 
         var filesMap = new Dictionary<string, PlondsFileEntry>(StringComparer.OrdinalIgnoreCase);
         var changedFilesMap = new Dictionary<string, PlondsChangedFileEntry>(StringComparer.OrdinalIgnoreCase);
@@ -97,7 +98,7 @@ public sealed class PlondsCommitDeltaBuilder
             changedFilesMap[normalizedPath] = new PlondsChangedFileEntry(normalizedPath, fileHash, fingerprint.Size, hashAlgorithm);
         }
 
-        var changedZipPath = CreateChangedZipFromList(currentExtractRoot, artifactFiles, outputRoot, options.Platform);
+        var changedZipPath = CreateChangedZipFromList(currentAppRoot, artifactFiles, outputRoot, options.Platform);
         var changedZipMd5 = ComputeMd5Hex(changedZipPath);
 
         var launcherInChanges = artifactFiles.Any(f =>

PenguinLogisticsOnlineNetworkDistributionSystem/src/Plonds.Core/Publishing/PlondsDeltaBuilder.cs

@@ -47,17 +47,26 @@ public sealed class PlondsDeltaBuilder
             PayloadUtilities.ExtractZip(baselinePayloadZip!, baselineExtractRoot);
         }
 
+        var currentAppRoot = ResolvePayloadAppRoot(currentExtractRoot, options.CurrentVersion);
+        var baselineAppRoot = isFullUpdate
+            ? null
+            : ResolvePayloadAppRoot(baselineExtractRoot, options.BaselineVersion);
+
         var previousManifest = isFullUpdate
             ? new Dictionary<string, PayloadUtilities.FileFingerprint>(StringComparer.OrdinalIgnoreCase)
-            : PayloadUtilities.ScanDirectory(baselineExtractRoot);
-        var currentManifest = PayloadUtilities.ScanDirectory(currentExtractRoot);
+            : PayloadUtilities.ScanDirectory(baselineAppRoot);
+        var currentManifest = PayloadUtilities.ScanDirectory(currentAppRoot);
 
         var filesMap = BuildFilesMap(previousManifest, currentManifest, hashAlgorithm);
         var changedFilesMap = BuildChangedFilesMap(filesMap, hashAlgorithm);
 
-        var changedZipPath = CreateChangedZip(currentExtractRoot, filesMap, outputRoot, options.Platform);
+        var changedZipPath = CreateChangedZip(currentAppRoot, filesMap, outputRoot, options.Platform);
 
-        var launcherChanged = DetectLauncherChange(previousManifest, currentManifest, options.LauncherRelativePath);
+        var previousRootManifest = isFullUpdate
+            ? new Dictionary<string, PayloadUtilities.FileFingerprint>(StringComparer.OrdinalIgnoreCase)
+            : PayloadUtilities.ScanDirectory(baselineExtractRoot);
+        var currentRootManifest = PayloadUtilities.ScanDirectory(currentExtractRoot);
+        var launcherChanged = DetectLauncherChange(previousRootManifest, currentRootManifest, options.LauncherRelativePath);
         var requiresCleanInstall = launcherChanged && !isFullUpdate;
 
         var changedZipMd5 = ComputeMd5Hex(changedZipPath);
@@ -216,6 +225,34 @@ public sealed class PlondsDeltaBuilder
         return !string.Equals(current.Sha256, previous.Sha256, StringComparison.OrdinalIgnoreCase);
     }
 
+    internal static string ResolvePayloadAppRoot(string extractRoot, string? version)
+    {
+        var resolvedRoot = Path.GetFullPath(extractRoot);
+        if (File.Exists(Path.Combine(resolvedRoot, "LanMountainDesktop.exe")))
+        {
+            return resolvedRoot;
+        }
+
+        if (!string.IsNullOrWhiteSpace(version))
+        {
+            var versionedAppRoot = Path.Combine(resolvedRoot, $"app-{version.Trim().TrimStart('v', 'V')}");
+            if (Directory.Exists(versionedAppRoot) &&
+                File.Exists(Path.Combine(versionedAppRoot, "LanMountainDesktop.exe")))
+            {
+                return versionedAppRoot;
+            }
+        }
+
+        var appRoots = Directory.Exists(resolvedRoot)
+            ? Directory.GetDirectories(resolvedRoot, "app-*", SearchOption.TopDirectoryOnly)
+                .Where(path => File.Exists(Path.Combine(path, "LanMountainDesktop.exe")))
+                .OrderByDescending(Path.GetFileName, StringComparer.OrdinalIgnoreCase)
+                .ToArray()
+            : [];
+
+        return appRoots.FirstOrDefault() ?? resolvedRoot;
+    }
+
     internal static string ComputeHash(string filePath, string hashAlgorithm)
     {
         using var stream = File.OpenRead(filePath);