Rebuild release pipeline around PLONDS and DDSS

.github/workflows/ddss-publish.yml

@@ -0,0 +1,166 @@
+name: DDSS
+
+on:
+  workflow_run:
+    workflows:
+      - PLONDS
+    types:
+      - completed
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: 'Release tag'
+        required: true
+        type: string
+
+env:
+  DOTNET_VERSION: '10.0.x'
+
+jobs:
+  publish:
+    if: ${{ github.event_name != 'workflow_run' || github.event.workflow_run.conclusion == 'success' }}
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      actions: read
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          submodules: recursive
+
+      - name: Resolve release tag
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          if [[ "${{ github.event_name }}" == "workflow_dispatch" ]]; then
+            RAW_TAG="${{ github.event.inputs.tag }}"
+            if [[ "$RAW_TAG" == v* ]]; then
+              TAG="$RAW_TAG"
+            else
+              TAG="v$RAW_TAG"
+            fi
+          else
+            gh run download "${{ github.event.workflow_run.id }}" -n plonds-run-metadata -D plonds-run-metadata
+            TAG="$(tr -d '\r\n' < plonds-run-metadata/tag.txt)"
+          fi
+
+          echo "RELEASE_TAG=${TAG}" >> "$GITHUB_ENV"
+          echo "S3_BASE_URL=${{ vars.S3_ENDPOINT }}/${{ vars.S3_BUCKET }}/lanmountain/update/releases/${TAG}/assets" >> "$GITHUB_ENV"
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: ${{ env.DOTNET_VERSION }}
+          dotnet-quality: preview
+
+      - name: Prepare signing key
+        env:
+          UPDATE_PRIVATE_KEY_PEM: ${{ secrets.UPDATE_PRIVATE_KEY_PEM }}
+          PLONDS_SIGNING_KEY: ${{ secrets.PLONDS_SIGNING_KEY }}
+          PDC_SIGNING_KEY: ${{ secrets.PDC_SIGNING_KEY }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          KEY="${PLONDS_SIGNING_KEY:-}"
+          if [[ -z "$KEY" ]]; then KEY="${UPDATE_PRIVATE_KEY_PEM:-}"; fi
+          if [[ -z "$KEY" ]]; then KEY="${PDC_SIGNING_KEY:-}"; fi
+          if [[ -z "$KEY" ]]; then
+            echo "No signing key is configured."
+            exit 1
+          fi
+          printf '%s' "$KEY" > update-private-key.pem
+          echo "UPDATE_PRIVATE_KEY_PATH=$PWD/update-private-key.pem" >> "$GITHUB_ENV"
+
+      - name: Build PLONDS tool
+        run: dotnet build PenguinLogisticsOnlineNetworkDistributionSystem/src/Plonds.Tool/Plonds.Tool.csproj -c Release
+
+      - name: Download release assets
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          mkdir -p release-assets
+          gh release download "$RELEASE_TAG" -D release-assets
+          find release-assets -maxdepth 1 -type f | sort
+
+      - name: Upload release assets to Rainyun S3
+        env:
+          AWS_ACCESS_KEY_ID: ${{ secrets.S3_ACCESS_KEY }}
+          AWS_SECRET_ACCESS_KEY: ${{ secrets.S3_SECRET_KEY }}
+          AWS_DEFAULT_REGION: ${{ vars.S3_REGION }}
+          AWS_REGION: ${{ vars.S3_REGION }}
+          S3_ENDPOINT: ${{ vars.S3_ENDPOINT }}
+          S3_BUCKET: ${{ vars.S3_BUCKET }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          aws --version
+          for file in release-assets/*; do
+            [[ -f "$file" ]] || continue
+            name="$(basename "$file")"
+            if [[ "$name" == "ddss.json" || "$name" == "ddss.json.sig" ]]; then
+              continue
+            fi
+            key="lanmountain/update/releases/${RELEASE_TAG}/assets/${name}"
+            sha256="$(sha256sum "$file" | awk '{print $1}')"
+            existing_sha="$(aws --endpoint-url "$S3_ENDPOINT" --region "$AWS_REGION" s3api head-object --bucket "$S3_BUCKET" --key "$key" --query 'Metadata.sha256' --output text 2>/dev/null || true)"
+            if [[ "$existing_sha" == "$sha256" ]]; then
+              echo "Skip existing asset: $name"
+              continue
+            fi
+            aws --endpoint-url "$S3_ENDPOINT" --region "$AWS_REGION" s3api put-object \
+              --bucket "$S3_BUCKET" \
+              --key "$key" \
+              --body "$file" \
+              --metadata "sha256=$sha256"
+          done
+
+      - name: Build DDSS manifest
+        shell: bash
+        run: |
+          set -euo pipefail
+          mkdir -p ddss-output
+          dotnet run --project PenguinLogisticsOnlineNetworkDistributionSystem/src/Plonds.Tool/Plonds.Tool.csproj --configuration Release -- \
+            build-ddss \
+            --release-tag "$RELEASE_TAG" \
+            --assets-dir release-assets \
+            --output-dir ddss-output \
+            --private-key "$UPDATE_PRIVATE_KEY_PATH" \
+            --repository "${{ github.repository }}" \
+            --s3-base-url "$S3_BASE_URL"
+
+      - name: Upload DDSS manifest to release
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          gh release upload "$RELEASE_TAG" ddss-output/ddss.json ddss-output/ddss.json.sig --clobber
+
+      - name: Upload DDSS manifest to Rainyun S3
+        env:
+          AWS_ACCESS_KEY_ID: ${{ secrets.S3_ACCESS_KEY }}
+          AWS_SECRET_ACCESS_KEY: ${{ secrets.S3_SECRET_KEY }}
+          AWS_DEFAULT_REGION: ${{ vars.S3_REGION }}
+          AWS_REGION: ${{ vars.S3_REGION }}
+          S3_ENDPOINT: ${{ vars.S3_ENDPOINT }}
+          S3_BUCKET: ${{ vars.S3_BUCKET }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          for file in ddss-output/ddss.json ddss-output/ddss.json.sig; do
+            name="$(basename "$file")"
+            key="lanmountain/update/releases/${RELEASE_TAG}/assets/${name}"
+            sha256="$(sha256sum "$file" | awk '{print $1}')"
+            aws --endpoint-url "$S3_ENDPOINT" --region "$AWS_REGION" s3api put-object \
+              --bucket "$S3_BUCKET" \
+              --key "$key" \
+              --body "$file" \
+              --metadata "sha256=$sha256"
+          done

.github/workflows/plonds-build.yml

@@ -0,0 +1,235 @@
+name: PLONDS
+
+on:
+  release:
+    types:
+      - published
+      - prereleased
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: 'Release tag'
+        required: true
+        type: string
+      baseline_tag:
+        description: 'Optional baseline tag'
+        required: false
+        type: string
+      channel:
+        description: 'Update channel'
+        required: false
+        type: choice
+        default: stable
+        options:
+          - stable
+          - preview
+
+env:
+  DOTNET_VERSION: '10.0.x'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          submodules: recursive
+
+      - name: Resolve release context
+        shell: bash
+        run: |
+          if [[ "${{ github.event_name }}" == "release" ]]; then
+            TAG="${{ github.event.release.tag_name }}"
+            if [[ "${{ github.event.release.prerelease }}" == "true" ]]; then
+              CHANNEL="preview"
+            else
+              CHANNEL="stable"
+            fi
+            BASELINE_TAG=""
+          else
+            RAW_TAG="${{ github.event.inputs.tag }}"
+            if [[ "${RAW_TAG}" == v* ]]; then
+              TAG="${RAW_TAG}"
+            else
+              TAG="v${RAW_TAG}"
+            fi
+            CHANNEL="${{ github.event.inputs.channel }}"
+            BASELINE_TAG="${{ github.event.inputs.baseline_tag }}"
+          fi
+
+          echo "RELEASE_TAG=${TAG}" >> "$GITHUB_ENV"
+          echo "RELEASE_VERSION=${TAG#v}" >> "$GITHUB_ENV"
+          echo "RELEASE_CHANNEL=${CHANNEL}" >> "$GITHUB_ENV"
+          echo "BASELINE_TAG_INPUT=${BASELINE_TAG}" >> "$GITHUB_ENV"
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: ${{ env.DOTNET_VERSION }}
+          dotnet-quality: preview
+
+      - name: Prepare signing key
+        env:
+          UPDATE_PRIVATE_KEY_PEM: ${{ secrets.UPDATE_PRIVATE_KEY_PEM }}
+          PLONDS_SIGNING_KEY: ${{ secrets.PLONDS_SIGNING_KEY }}
+          PDC_SIGNING_KEY: ${{ secrets.PDC_SIGNING_KEY }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          KEY="${PLONDS_SIGNING_KEY:-}"
+          if [[ -z "$KEY" ]]; then KEY="${UPDATE_PRIVATE_KEY_PEM:-}"; fi
+          if [[ -z "$KEY" ]]; then KEY="${PDC_SIGNING_KEY:-}"; fi
+          if [[ -z "$KEY" ]]; then
+            echo "No signing key is configured."
+            exit 1
+          fi
+          printf '%s' "$KEY" > update-private-key.pem
+          echo "UPDATE_PRIVATE_KEY_PATH=$PWD/update-private-key.pem" >> "$GITHUB_ENV"
+
+      - name: Build PLONDS tool
+        run: dotnet build PenguinLogisticsOnlineNetworkDistributionSystem/src/Plonds.Tool/Plonds.Tool.csproj -c Release
+
+      - name: Resolve baseline plan
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        shell: pwsh
+        run: |
+          $ErrorActionPreference = 'Stop'
+          $repo = '${{ github.repository }}'
+          $tag = $env:RELEASE_TAG
+          $baselineInput = $env:BASELINE_TAG_INPUT
+          $currentRelease = gh release view $tag --repo $repo --json tagName,isPrerelease,assets,publishedAt | ConvertFrom-Json
+          $allReleases = gh api "repos/$repo/releases?per_page=100" | ConvertFrom-Json
+          $platforms = @('windows-x64', 'windows-x86', 'linux-x64')
+
+          $entries = foreach ($platform in $platforms) {
+            $assetName = "files-$platform.zip"
+            $currentAsset = $currentRelease.assets | Where-Object { $_.name -eq $assetName } | Select-Object -First 1
+            if (-not $currentAsset) {
+              throw "Current release $tag does not contain required asset $assetName"
+            }
+
+            $baselineRelease = $null
+            if (-not [string]::IsNullOrWhiteSpace($baselineInput)) {
+              $normalizedBaseline = if ($baselineInput.StartsWith('v')) { $baselineInput } else { "v$baselineInput" }
+              $baselineRelease = $allReleases | Where-Object { $_.tag_name -eq $normalizedBaseline } | Select-Object -First 1
+              if (-not $baselineRelease) {
+                throw "Specified baseline tag not found: $normalizedBaseline"
+              }
+            }
+            else {
+              $baselineRelease = $allReleases |
+                Where-Object {
+                  $_.tag_name -ne $tag -and
+                  -not $_.draft -and
+                  [bool]$_.prerelease -eq [bool]$currentRelease.isPrerelease -and
+                  ($_.assets | Where-Object { $_.name -eq $assetName } | Measure-Object).Count -gt 0
+                } |
+                Select-Object -First 1
+            }
+
+            [pscustomobject]@{
+              platform = $platform
+              assetName = $assetName
+              baselineTag = if ($baselineRelease) { $baselineRelease.tag_name } else { $null }
+              baselineVersion = if ($baselineRelease) { ($baselineRelease.tag_name -replace '^v', '') } else { $null }
+              isFullPayload = -not $baselineRelease
+            }
+          }
+
+          $plan = [pscustomobject]@{
+            tag = $tag
+            version = $env:RELEASE_VERSION
+            channel = $env:RELEASE_CHANNEL
+            platforms = $entries
+          }
+
+          $plan | ConvertTo-Json -Depth 8 | Set-Content plonds-plan.json -Encoding utf8
+          Get-Content plonds-plan.json
+
+      - name: Download payload zips
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        shell: pwsh
+        run: |
+          $ErrorActionPreference = 'Stop'
+          $repo = '${{ github.repository }}'
+          $plan = Get-Content plonds-plan.json | ConvertFrom-Json
+
+          foreach ($entry in $plan.platforms) {
+            $currentDir = Join-Path $PWD "plonds-input/current/$($entry.platform)"
+            New-Item -ItemType Directory -Path $currentDir -Force | Out-Null
+            gh release download $plan.tag --repo $repo -p $entry.assetName -D $currentDir
+
+            if (-not [string]::IsNullOrWhiteSpace($entry.baselineTag)) {
+              $baselineDir = Join-Path $PWD "plonds-input/baseline/$($entry.platform)"
+              New-Item -ItemType Directory -Path $baselineDir -Force | Out-Null
+              gh release download $entry.baselineTag --repo $repo -p $entry.assetName -D $baselineDir
+            }
+          }
+
+      - name: Build delta assets
+        shell: pwsh
+        run: |
+          $ErrorActionPreference = 'Stop'
+          $plan = Get-Content plonds-plan.json | ConvertFrom-Json
+          foreach ($entry in $plan.platforms) {
+            $currentZip = Join-Path $PWD "plonds-input/current/$($entry.platform)/$($entry.assetName)"
+            $args = @(
+              'run', '--project', 'PenguinLogisticsOnlineNetworkDistributionSystem/src/Plonds.Tool/Plonds.Tool.csproj', '--configuration', 'Release', '--',
+              'build-delta',
+              '--platform', $entry.platform,
+              '--current-version', $plan.version,
+              '--current-tag', $plan.tag,
+              '--current-zip', $currentZip,
+              '--output-dir', 'plonds-output',
+              '--private-key', $env:UPDATE_PRIVATE_KEY_PATH,
+              '--channel', $plan.channel
+            )
+
+            if ([bool]$entry.isFullPayload) {
+              $args += @('--is-full-payload', 'true')
+            }
+            else {
+              $baselineZip = Join-Path $PWD "plonds-input/baseline/$($entry.platform)/$($entry.assetName)"
+              $args += @('--baseline-tag', $entry.baselineTag, '--baseline-version', $entry.baselineVersion, '--baseline-zip', $baselineZip)
+            }
+
+            dotnet @args
+          }
+
+          dotnet run --project PenguinLogisticsOnlineNetworkDistributionSystem/src/Plonds.Tool/Plonds.Tool.csproj --configuration Release -- `
+            build-index `
+            --release-tag $plan.tag `
+            --version $plan.version `
+            --channel $plan.channel `
+            --platform-summaries-dir plonds-output/platform-summaries `
+            --output-dir plonds-output `
+            --private-key $env:UPDATE_PRIVATE_KEY_PATH
+
+      - name: Upload PLONDS assets to release
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          gh release upload "$RELEASE_TAG" plonds-output/release-assets/* --clobber
+
+      - name: Persist run metadata
+        shell: bash
+        run: |
+          mkdir -p plonds-run-metadata
+          printf '%s' "$RELEASE_TAG" > plonds-run-metadata/tag.txt
+
+      - name: Upload run metadata artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: plonds-run-metadata
+          path: plonds-run-metadata/tag.txt
+          if-no-files-found: error
+          retention-days: 7

.github/workflows/release.yml

@@ -15,23 +15,6 @@ on:
         required: false
         type: boolean
         default: false
-      incremental_strategy:
-        description: 'Incremental strategy'
-        required: false
-        type: choice
-        default: release-payload
-        options:
-          - release-payload
-          - commit-range
-      publish_incremental_release:
-        description: 'Publish as incremental release'
-        required: false
-        type: boolean
-        default: true
-      baseline_ref:
-        description: 'Optional baseline tag/version/commit'
-        required: false
-        type: string
 
 env:
   DOTNET_VERSION: '10.0.x'
@@ -47,6 +30,8 @@ jobs:
       informational_version: ${{ steps.version.outputs.informational_version }}
       tag: ${{ steps.version.outputs.tag }}
       checkout_ref: ${{ steps.version.outputs.checkout_ref }}
+      is_prerelease: ${{ steps.version.outputs.is_prerelease }}
+      release_channel: ${{ steps.version.outputs.release_channel }}
 
     steps:
       - name: Checkout repository metadata
@@ -60,6 +45,7 @@ jobs:
           if [[ "${{ github.event_name }}" == "push" ]]; then
             TAG="${GITHUB_REF#refs/tags/}"
             CHECKOUT_REF="${GITHUB_REF}"
+            IS_PRERELEASE="false"
           else
             RAW_TAG="${{ github.event.inputs.tag }}"
             if [[ "${RAW_TAG}" == refs/tags/* ]]; then
@@ -69,23 +55,40 @@ jobs:
             else
               TAG="v${RAW_TAG}"
             fi
+
             if git rev-parse -q --verify "refs/tags/${TAG}" >/dev/null; then
               CHECKOUT_REF="refs/tags/${TAG}"
             else
               CHECKOUT_REF="${GITHUB_SHA}"
             fi
+
+            if [[ "${{ github.event.inputs.is_prerelease }}" == "true" ]]; then
+              IS_PRERELEASE="true"
+            else
+              IS_PRERELEASE="false"
+            fi
           fi
+
           VERSION="${TAG#v}"
           IFS='.' read -r -a VERSION_PARTS <<< "${VERSION}"
           while [ "${#VERSION_PARTS[@]}" -lt 4 ]; do
             VERSION_PARTS+=("0")
           done
           ASSEMBLY_VERSION="${VERSION_PARTS[0]}.${VERSION_PARTS[1]}.${VERSION_PARTS[2]}.${VERSION_PARTS[3]}"
-          echo "tag=${TAG}" >> $GITHUB_OUTPUT
+
-          echo "version=${VERSION}" >> $GITHUB_OUTPUT
+          if [[ "${IS_PRERELEASE}" == "true" ]]; then
-          echo "assembly_version=${ASSEMBLY_VERSION}" >> $GITHUB_OUTPUT
+            RELEASE_CHANNEL="preview"
-          echo "informational_version=${VERSION}" >> $GITHUB_OUTPUT
+          else
-          echo "checkout_ref=${CHECKOUT_REF}" >> $GITHUB_OUTPUT
+            RELEASE_CHANNEL="stable"
+          fi
+
+          echo "tag=${TAG}" >> "$GITHUB_OUTPUT"
+          echo "version=${VERSION}" >> "$GITHUB_OUTPUT"
+          echo "assembly_version=${ASSEMBLY_VERSION}" >> "$GITHUB_OUTPUT"
+          echo "informational_version=${VERSION}" >> "$GITHUB_OUTPUT"
+          echo "checkout_ref=${CHECKOUT_REF}" >> "$GITHUB_OUTPUT"
+          echo "is_prerelease=${IS_PRERELEASE}" >> "$GITHUB_OUTPUT"
+          echo "release_channel=${RELEASE_CHANNEL}" >> "$GITHUB_OUTPUT"
 
   build-windows:
     needs: prepare
@@ -133,9 +136,6 @@ jobs:
           $arch = "${{ matrix.arch }}"
           $launcherPublishDir = "publish/launcher-win-$arch"
 
-          Write-Host "Publishing Launcher with AOT for Windows $arch..."
-
-          # AOT publish
           dotnet publish LanMountainDesktop.Launcher/LanMountainDesktop.Launcher.csproj `
             -c Release `
             -o ./$launcherPublishDir `
@@ -156,21 +156,6 @@ jobs:
             Write-Error "Launcher AOT publish failed"
             exit 1
           }
-
-          # é<>„剧ã<C2A7>šé<C5A1>™æˆ<C3A6>ç«·ç¼<C3A7>æ’´ç<C2B4>?
-          Write-Host "Launcher published to: $launcherPublishDir"
-          $exeFile = Get-ChildItem -Path $launcherPublishDir -Filter "*.exe" | Select-Object -First 1
-          if ($exeFile) {
-            $size = [Math]::Round($exeFile.Length / 1MB, 2)
-            Write-Host "Launcher executable: $($exeFile.Name) ($size MB)"
-          }
-
-          # Warn if unexpected extra files are produced
-          $files = Get-ChildItem -Path $launcherPublishDir -File
-          if ($files.Count -gt 1) {
-            Write-Host "Warning: Expected single file but found $($files.Count) files"
-            $files | ForEach-Object { Write-Host "  - $($_.Name)" }
-          }
         shell: pwsh
 
       - name: Publish Main App
@@ -208,9 +193,6 @@ jobs:
               -p:FileVersion=${{ needs.prepare.outputs.assembly_version }} `
               -p:InformationalVersion=${{ needs.prepare.outputs.informational_version }}
           }
-
-          Write-Host "Published to: $publishDir"
-          Write-Host "Self-contained: $selfContained"
         shell: pwsh
 
       - name: Restructure for Launcher
@@ -221,30 +203,18 @@ jobs:
           $publishDir = if ($selfContained) { "publish/windows-$arch" } else { "publish/windows-$arch-lite" }
           $launcherPublishDir = "publish/launcher-win-$arch"
           $appDir = "app-$version"
-
-          Write-Host "Restructuring for Launcher mode..."
-          Write-Host "Version: $version"
-          Write-Host "Publish dir: $publishDir"
-
           $newStructure = "publish-launcher/windows-$arch"
-          New-Item -ItemType Directory -Path $newStructure -Force | Out-Null
 
+          New-Item -ItemType Directory -Path $newStructure -Force | Out-Null
           $appPath = Join-Path $newStructure $appDir
           Move-Item -Path $publishDir -Destination $appPath -Force
 
-          $launcherSource = $launcherPublishDir
+          if (Test-Path $launcherPublishDir) {
-          if (Test-Path $launcherSource) {
+            Copy-Item -Path "$launcherPublishDir\*" -Destination $newStructure -Recurse -Force
-            Write-Host "Copying Launcher to root..."
-            Copy-Item -Path "$launcherSource\*" -Destination $newStructure -Recurse -Force
-          } else {
-            Write-Warning "Launcher publish dir not found: $launcherSource"
           }
 
           New-Item -ItemType File -Path (Join-Path $appPath ".current") -Force | Out-Null
 
-          Write-Host "New directory structure:"
-          Get-ChildItem -Path $newStructure -Recurse -Depth 2 | Select-Object FullName
-
           Remove-Item -Path $publishDir -Recurse -Force -ErrorAction SilentlyContinue
           Remove-Item -Path $launcherPublishDir -Recurse -Force -ErrorAction SilentlyContinue
           Move-Item -Path $newStructure -Destination $publishDir -Force
@@ -260,61 +230,27 @@ jobs:
         run: |
           $version = "${{ needs.prepare.outputs.version }}"
           $arch = "${{ matrix.arch }}"
-          $selfContained = "${{ matrix.self_contained }}" -eq "true"
           $suffix = "${{ matrix.suffix }}"
-          $publishDir = if ($selfContained) { "publish\windows-$arch" } else { "publish\windows-$arch-lite" }
+          $selfContained = "${{ matrix.self_contained }}" -eq "true"
-          $installerScript = "LanMountainDesktop\installer\LanMountainDesktop.iss"
+          $publishDir = if ($selfContained) { "publish/windows-$arch" } else { "publish/windows-$arch-lite" }
           $outputDir = "build-installer"
-
+          $installerScript = "LanMountainDesktop/packaging/windows/LanMountainDesktop.iss"
-          if (-not (Test-Path -Path $publishDir)) {
-            Write-Error "Publish directory not found: $publishDir"
-            Get-ChildItem -Path "publish" -Directory -ErrorAction SilentlyContinue | Select-Object Name
-            exit 1
-          }
 
           New-Item -ItemType Directory -Path $outputDir -Force | Out-Null
 
-          if (-not (Test-Path -Path $installerScript)) {
-            Write-Error "Installer script not found: $installerScript"
-            exit 1
-          }
-
-          $isccPath = $null
-          $isccCommand = Get-Command ISCC.exe -ErrorAction SilentlyContinue
-          if ($isccCommand) {
-            $isccPath = $isccCommand.Source
-          }
-
           $candidatePaths = @(
-            "C:\Program Files (x86)\Inno Setup 6\ISCC.exe",
+            (Get-Command iscc.exe -ErrorAction SilentlyContinue | Select-Object -ExpandProperty Source -ErrorAction SilentlyContinue),
-            "C:\Program Files\Inno Setup 6\ISCC.exe",
+            "$env:ProgramFiles(x86)\Inno Setup 6\ISCC.exe",
-            "$env:ChocolateyInstall\bin\ISCC.exe",
+            "$env:ProgramFiles\Inno Setup 6\ISCC.exe",
             "$env:ChocolateyInstall\lib\innosetup\tools\ISCC.exe"
-          )
+          ) | Where-Object { $_ -and (Test-Path $_) }
 
+          $isccPath = $candidatePaths | Select-Object -First 1
           if (-not $isccPath) {
-            foreach ($candidate in $candidatePaths) {
-              if ($candidate -and (Test-Path -Path $candidate)) {
-                $isccPath = $candidate
-                break
-              }
-            }
-          }
-
-          if (-not $isccPath) {
-            Write-Host "ISCC.exe was not found in PATH or known locations."
-            Write-Host "Checked locations:"
-            $candidatePaths | ForEach-Object { Write-Host " - $_" }
-            Write-Host "Chocolatey bin listing (if exists):"
-            Get-ChildItem "$env:ChocolateyInstall\bin" -Filter "*iscc*" -ErrorAction SilentlyContinue | Select-Object FullName
             Write-Error "Inno Setup compiler not found."
             exit 1
           }
 
-          Write-Host "Found Inno Setup at: $isccPath"
-
-          Write-Host "Building installer for Windows $arch with version $version..."
-
           $publishDir = (Resolve-Path $publishDir).Path
           $outputDir = (Resolve-Path $outputDir).Path
           $installerScript = (Resolve-Path $installerScript).Path
@@ -329,8 +265,6 @@ jobs:
             $installerScript
           )
 
-          Write-Host "Compile command: `"$isccPath`" $($compileArgs -join ' ')"
-
           & $isccPath @compileArgs
           if ($LASTEXITCODE -ne 0) {
             Write-Error "Inno Setup compiler exited with code $LASTEXITCODE"
@@ -342,25 +276,53 @@ jobs:
             Write-Error "Failed to create installer"
             exit 1
           }
-
-          Write-Host "Successfully created: $($installerFile.Name)"
-          Write-Host "Installer size: $([Math]::Round($installerFile.Length / 1MB, 2)) MB"
         shell: pwsh
 
-      - name: Upload App Payload
+      - name: Package Payload Zip
-        uses: actions/upload-artifact@v4
+        run: |
-        with:
+          $version = "${{ needs.prepare.outputs.version }}"
-          name: app-payload-windows-${{ matrix.arch }}
+          $arch = "${{ matrix.arch }}"
-          path: |
+          $payloadRoot = Join-Path (Join-Path $PWD "publish/windows-$arch") "app-$version"
-            publish/windows-${{ matrix.arch }}/**
+          if (-not (Test-Path $payloadRoot)) {
-          if-no-files-found: error
+            Write-Error "Payload root not found: $payloadRoot"
-          retention-days: 30
+            exit 1
+          }
 
-      - name: Upload Installer
+          $stageDir = Join-Path $PWD "payload-stage/windows-$arch"
+          $releaseDir = Join-Path $PWD "release-assets"
+          Remove-Item -Path $stageDir -Recurse -Force -ErrorAction SilentlyContinue
+          New-Item -ItemType Directory -Path $stageDir -Force | Out-Null
+          New-Item -ItemType Directory -Path $releaseDir -Force | Out-Null
+
+          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/')) {
+              return
+            }
+
+            $destination = Join-Path $stageDir ($relative -replace '/', [System.IO.Path]::DirectorySeparatorChar)
+            $destinationDir = Split-Path -Path $destination -Parent
+            if (-not [string]::IsNullOrWhiteSpace($destinationDir)) {
+              New-Item -ItemType Directory -Path $destinationDir -Force | Out-Null
+            }
+
+            Copy-Item -Path $_.FullName -Destination $destination -Force
+          }
+
+          $payloadZip = Join-Path $releaseDir "files-windows-$arch.zip"
+          if (Test-Path $payloadZip) {
+            Remove-Item $payloadZip -Force
+          }
+          Compress-Archive -Path (Join-Path $stageDir '*') -DestinationPath $payloadZip -Force
+        shell: pwsh
+
+      - name: Upload Release Assets
         uses: actions/upload-artifact@v4
         with:
-          name: installer-windows-${{ matrix.arch }}
+          name: release-windows-${{ matrix.arch }}
-          path: build-installer/*.exe
+          path: |
+            release-assets/files-windows-${{ matrix.arch }}.zip
+            build-installer/*.exe
           if-no-files-found: error
           retention-days: 30
 
@@ -385,13 +347,10 @@ jobs:
             libx11-6 libxrandr2 libxinerama1 \
             libxi6 libxcursor1 libxext6 \
             libxrender1 libxkbcommon-x11-0 \
-            clang zlib1g-dev
+            clang zlib1g-dev zip rsync
 
-          # Ubuntu 24.04+ moved several packages to t64 names.
           sudo apt-get install -y libasound2t64 || sudo apt-get install -y libasound2
           sudo apt-get install -y libportaudio2t64 || sudo apt-get install -y libportaudio2
-
-          # Prefer modern WebKit package, fallback for older images.
           sudo apt-get install -y libwebkit2gtk-4.1-dev || sudo apt-get install -y libwebkit2gtk-4.0-dev
 
       - name: Setup .NET
@@ -413,8 +372,6 @@ jobs:
 
       - name: Publish Launcher (AOT)
         run: |
-          echo "Publishing Launcher with AOT for Linux x64..."
-
           dotnet publish LanMountainDesktop.Launcher/LanMountainDesktop.Launcher.csproj \
             -c Release \
             -o ./publish/launcher-linux-x64 \
@@ -431,14 +388,6 @@ jobs:
             -p:FileVersion=${{ needs.prepare.outputs.assembly_version }} \
             -p:InformationalVersion=${{ needs.prepare.outputs.informational_version }}
 
-          if [ $? -ne 0 ]; then
-            echo "Launcher AOT publish failed"
-            exit 1
-          fi
-
-          echo "Launcher published to: ./publish/launcher-linux-x64"
-          ls -lh ./publish/launcher-linux-x64/
-
       - name: Publish Main App
         run: |
           dotnet publish LanMountainDesktop/LanMountainDesktop.csproj \
@@ -464,25 +413,15 @@ jobs:
           appDir="app-$version"
           launcherDir="publish/launcher-linux-x64"
 
-          echo "Restructuring for Launcher mode..."
-          echo "Version: $version"
-
           mkdir -p "$publishDir"
           mv "publish/linux-x64-app" "$publishDir/$appDir"
 
           if [ -d "$launcherDir" ]; then
-            echo "Copying Launcher to root..."
             cp -r "$launcherDir"/* "$publishDir/"
             chmod +x "$publishDir/LanMountainDesktop.Launcher" 2>/dev/null || true
-          else
-            echo "Warning: Launcher publish dir not found: $launcherDir"
           fi
 
           touch "$publishDir/$appDir/.current"
-
-          echo "New directory structure:"
-          find "$publishDir" -maxdepth 2 | head -50
-
           rm -rf "$launcherDir"
 
       - name: Package as DEB
@@ -495,12 +434,6 @@ jobs:
           desktop_template="LanMountainDesktop/packaging/linux/LanMountainDesktop.desktop"
           icon_source="LanMountainDesktop/packaging/linux/lanmountaindesktop.png"
 
-          if [ ! -d "$source" ]; then
-            echo "Error: Source directory not found: $source"
-            ls -la publish/ || echo "publish directory not found"
-            exit 1
-          fi
-
           mkdir -p "build-deb/DEBIAN"
           mkdir -p "build-deb/usr/local/bin"
           mkdir -p "build-deb/usr/share/applications"
@@ -509,20 +442,6 @@ jobs:
 
           cp -r "$source"/* "build-deb/usr/local/bin/"
 
-          item_count=$(find build-deb/usr/local/bin -type f 2>/dev/null | wc -l)
-          echo "DEB package contains $item_count files"
-
-          if [ "$item_count" -eq 0 ]; then
-            echo "Error: DEB package is empty after copy"
-            exit 1
-          fi
-
-          if [ ! -f "$desktop_template" ] || [ ! -f "$icon_source" ]; then
-            echo "Error: Linux desktop resources are missing"
-            ls -la "LanMountainDesktop/packaging/linux" || true
-            exit 1
-          fi
-
           sed \
             -e "s|@@EXEC@@|/usr/local/bin/LanMountainDesktop.Launcher|g" \
             -e "s|@@ICON@@|lanmountaindesktop|g" \
@@ -546,9 +465,9 @@ jobs:
             printf '%s\n' "Package: $package_name"
             printf '%s\n' "Version: $package_version"
             printf '%s\n' "Architecture: $arch"
-            printf '%s\n' "Maintainer: LanMountain Team <dev@example.com>"
+            printf '%s\n' 'Maintainer: LanMountain Team <dev@example.com>'
-            printf '%s\n' "Description: LanMountain Desktop Application"
+            printf '%s\n' 'Description: LanMountain Desktop Application'
-            printf '%s\n' " A desktop application for LanMountain."
+            printf '%s\n' ' A desktop application for LanMountain.'
           } > "build-deb/DEBIAN/control"
 
           chmod 755 "build-deb/usr/local/bin/LanMountainDesktop.Launcher" 2>/dev/null || chmod 755 "build-deb/usr/local/bin"/*
@@ -557,35 +476,49 @@ jobs:
           chmod 644 "build-deb/usr/share/icons/hicolor/256x256/apps/lanmountaindesktop.png"
           chmod 755 "build-deb/DEBIAN/postinst"
 
-          if dpkg-deb --build "build-deb" "${package_name}_${package_version}_${arch}.deb"; then
+          dpkg-deb --build "build-deb" "${package_name}_${package_version}_${arch}.deb"
-            echo "Successfully created: ${package_name}_${package_version}_${arch}.deb"
+
-            ls -lh "${package_name}_${package_version}_${arch}.deb"
+      - name: Package Payload Zip
-          else
+        run: |
-            echo "Error: Failed to build DEB package"
+          version="${{ needs.prepare.outputs.version }}"
+          payload_root="publish/linux-x64/app-$version"
+          release_dir="$PWD/release-assets"
+          stage_dir="$PWD/payload-stage/linux-x64"
+
+          if [ ! -d "$payload_root" ]; then
+            echo "Payload root not found: $payload_root"
             exit 1
           fi
 
-      - name: Upload App Payload
+          rm -rf "$stage_dir"
-        uses: actions/upload-artifact@v4
+          mkdir -p "$stage_dir" "$release_dir"
-        with:
+          rsync -a \
-          name: app-payload-linux-x64
+            --exclude '.current' \
-          path: |
+            --exclude '.partial' \
-            publish/linux-x64/**
+            --exclude '.destroy' \
-          if-no-files-found: error
+            "$payload_root/" "$stage_dir/"
-          retention-days: 30
 
-      - name: Upload Installer
+          (
+            cd "$stage_dir"
+            zip -qr "$release_dir/files-linux-x64.zip" .
+          )
+
+      - name: Upload Release Assets
         uses: actions/upload-artifact@v4
         with:
-          name: installer-linux-x64
+          name: release-linux-x64
-          path: "*.deb"
+          path: |
+            release-assets/files-linux-x64.zip
+            *.deb
           if-no-files-found: error
           retention-days: 30
 
   build-macos:
     needs: prepare
     runs-on: macos-latest
+    continue-on-error: true
     strategy:
+      fail-fast: false
       matrix:
         arch: [x64, arm64]
     name: Build_macOS_${{ matrix.arch }}
@@ -620,8 +553,6 @@ jobs:
 
       - name: Publish Launcher (AOT)
         run: |
-          echo "Publishing Launcher with AOT for macOS ${{ matrix.arch }}..."
-
           dotnet publish LanMountainDesktop.Launcher/LanMountainDesktop.Launcher.csproj \
             -c Release \
             -o ./publish/launcher-macos-${{ matrix.arch }} \
@@ -638,14 +569,6 @@ jobs:
             -p:FileVersion=${{ needs.prepare.outputs.assembly_version }} \
             -p:InformationalVersion=${{ needs.prepare.outputs.informational_version }}
 
-          if [ $? -ne 0 ]; then
-            echo "Launcher AOT publish failed"
-            exit 1
-          fi
-
-          echo "Launcher published to: ./publish/launcher-macos-${{ matrix.arch }}"
-          ls -lh ./publish/launcher-macos-${{ matrix.arch }}/
-
       - name: Publish Main App
         run: |
           dotnet publish LanMountainDesktop/LanMountainDesktop.csproj \
@@ -664,7 +587,22 @@ jobs:
             -p:FileVersion=${{ needs.prepare.outputs.assembly_version }} \
             -p:InformationalVersion=${{ needs.prepare.outputs.informational_version }}
 
+      - name: Package Payload Zip
+        run: |
+          release_dir="$PWD/release-assets"
+          stage_dir="$PWD/payload-stage/macos-${{ matrix.arch }}"
+          payload_root="publish/macos-${{ matrix.arch }}-app"
+
+          rm -rf "$stage_dir"
+          mkdir -p "$stage_dir" "$release_dir"
+          rsync -a "$payload_root/" "$stage_dir/"
+          (
+            cd "$stage_dir"
+            zip -qr "$release_dir/files-macos-${{ matrix.arch }}.zip" .
+          )
+
       - name: Restructure and Package as DMG
+        continue-on-error: true
         run: |
           version="${{ needs.prepare.outputs.version }}"
           arch="${{ matrix.arch }}"
@@ -673,41 +611,19 @@ jobs:
           launcherDir="publish/launcher-macos-$arch"
           appSourceDir="publish/macos-$arch-app"
 
-          echo "Restructuring for Launcher mode..."
-          echo "Version: $version"
-
           mkdir -p "${app_name}.app/Contents/MacOS"
-
           appDir="app-$version"
           mkdir -p "${app_name}.app/Contents/MacOS/$appDir"
 
-          if [ -d "$appSourceDir" ]; then
+          cp -r "$appSourceDir"/* "${app_name}.app/Contents/MacOS/$appDir/"
-            cp -r "$appSourceDir"/* "${app_name}.app/Contents/MacOS/$appDir/"
-          else
-            echo "Error: Main app source directory not found: $appSourceDir"
-            exit 1
-          fi
-
           if [ -d "$launcherDir" ]; then
-            echo "Copying Launcher to root..."
             cp -r "$launcherDir"/* "${app_name}.app/Contents/MacOS/"
             chmod +x "${app_name}.app/Contents/MacOS/LanMountainDesktop.Launcher" 2>/dev/null || true
-          else
-            echo "Warning: Launcher publish dir not found: $launcherDir"
           fi
 
           touch "${app_name}.app/Contents/MacOS/$appDir/.current"
-
           mkdir -p "${app_name}.app/Contents/Resources"
 
-          item_count=$(find "${app_name}.app/Contents/MacOS" -type f | wc -l)
-          echo "App bundle contains $item_count files"
-
-          if [ "$item_count" -eq 0 ]; then
-            echo "Error: App bundle is empty after copy"
-            exit 1
-          fi
-
           {
             printf '%s\n' '<?xml version="1.0" encoding="UTF-8"?>'
             printf '%s\n' '<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">'
@@ -731,306 +647,73 @@ jobs:
 
           mkdir -p dmg-temp
           cp -r "${app_name}.app" dmg-temp/
+          hdiutil create -volname "${app_name}" -srcfolder dmg-temp -ov -format UDZO "${package_name}.dmg"
 
-          if hdiutil create -volname "${app_name}" -srcfolder dmg-temp -ov -format UDZO "${package_name}.dmg" 2>&1; then
+      - name: Upload Release Assets
-            echo "Successfully created: ${package_name}.dmg"
+        if: always()
-            ls -lh "${package_name}.dmg"
-          else
-            echo "Error: Failed to create DMG"
-            exit 1
-          fi
-
-          rm -rf dmg-temp "${app_name}.app"
-
-      - name: Upload
         uses: actions/upload-artifact@v4
         with:
-          name: installer-macos-${{ matrix.arch }}
+          name: release-macos-${{ matrix.arch }}
-          path: "*.dmg"
+          path: |
-          if-no-files-found: error
+            release-assets/files-macos-${{ matrix.arch }}.zip
+            *.dmg
+          if-no-files-found: ignore
           retention-days: 30
 
-  publish-plonds:
-    needs: [ prepare, build-windows, build-linux ]
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-    env:
-      VERSION: ${{ needs.prepare.outputs.version }}
-      S3_ENDPOINT: ${{ vars.S3_ENDPOINT }}
-      S3_BUCKET: ${{ vars.S3_BUCKET }}
-      S3_REGION: ${{ vars.S3_REGION }}
-      UPDATE_PRIVATE_KEY_PEM: ${{ secrets.UPDATE_PRIVATE_KEY_PEM }}
-      PLONDS_SIGNING_KEY: ${{ secrets.PLONDS_SIGNING_KEY }}
-      PDC_SIGNING_KEY: ${{ secrets.PDC_SIGNING_KEY }}
-      S3_ACCESS_KEY: ${{ secrets.S3_ACCESS_KEY }}
-      S3_SECRET_KEY: ${{ secrets.S3_SECRET_KEY }}
-      AWS_ACCESS_KEY_ID: ${{ secrets.S3_ACCESS_KEY }}
-      AWS_SECRET_ACCESS_KEY: ${{ secrets.S3_SECRET_KEY }}
-      AWS_DEFAULT_REGION: ${{ vars.S3_REGION }}
-      AWS_REGION: ${{ vars.S3_REGION }}
-      AWS_EC2_METADATA_DISABLED: "true"
-      AWS_REQUEST_CHECKSUM_CALCULATION: "WHEN_REQUIRED"
-      AWS_RESPONSE_CHECKSUM_VALIDATION: "WHEN_REQUIRED"
-
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-          submodules: recursive
-          ref: ${{ needs.prepare.outputs.checkout_ref }}
-
-      - name: Setup .NET
-        uses: actions/setup-dotnet@v4
-        with:
-          dotnet-version: ${{ env.DOTNET_VERSION }}
-          dotnet-quality: 'preview'
-
-      - name: Download app payload artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: artifacts/app-payload
-          pattern: app-payload-*
-
-      - name: Download installer artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: artifacts/installers
-          pattern: installer-*
-
-      - name: Prepare signing key
-        shell: pwsh
-        run: |
-          $ErrorActionPreference = "Stop"
-
-          function Test-PemKey {
-            param([string]$PemText)
-
-            if ([string]::IsNullOrWhiteSpace($PemText)) {
-              return $false
-            }
-
-            $rsa = [System.Security.Cryptography.RSA]::Create()
-            try {
-              $rsa.ImportFromPem($PemText)
-              return $true
-            }
-            catch {
-              return $false
-            }
-            finally {
-              $rsa.Dispose()
-            }
-          }
-
-          $candidates = @(
-            $env:PLONDS_SIGNING_KEY,
-            $env:UPDATE_PRIVATE_KEY_PEM,
-            $env:PDC_SIGNING_KEY
-          )
-
-          $key = $null
-          foreach ($candidate in $candidates) {
-            if (Test-PemKey $candidate) {
-              $key = $candidate
-              break
-            }
-          }
-
-          if ([string]::IsNullOrWhiteSpace($key)) {
-            throw "Missing a valid PEM signing key in PLONDS_SIGNING_KEY, UPDATE_PRIVATE_KEY_PEM, or PDC_SIGNING_KEY."
-          }
-
-          $keyPath = Join-Path $PWD "update-private-key.pem"
-          [System.IO.File]::WriteAllText($keyPath, $key, [System.Text.Encoding]::ASCII)
-          Add-Content -Path $env:GITHUB_ENV -Value "UPDATE_PRIVATE_KEY_PATH=$keyPath"
-
-      - name: Probe S3 access
-        if: ${{ env.S3_ENDPOINT != '' && env.S3_BUCKET != '' && env.S3_ACCESS_KEY != '' && env.S3_SECRET_KEY != '' }}
-        shell: bash
-        run: |
-          set -euo pipefail
-          aws --version
-          aws --endpoint-url "$S3_ENDPOINT" --region "$S3_REGION" s3 ls "s3://$S3_BUCKET" >/dev/null
-          echo "S3 access probe succeeded for $S3_BUCKET"
-
-      - name: Build PLONDS assets
-        shell: pwsh
-        run: |
-          $ErrorActionPreference = "Stop"
-          $incrementalStrategy = if ("${{ github.event_name }}" -eq "workflow_dispatch" -and -not [string]::IsNullOrWhiteSpace("${{ github.event.inputs.incremental_strategy }}")) {
-            "${{ github.event.inputs.incremental_strategy }}"
-          } else {
-            "release-payload"
-          }
-          $publishIncrementalRelease = if ("${{ github.event_name }}" -eq "workflow_dispatch" -and -not [string]::IsNullOrWhiteSpace("${{ github.event.inputs.publish_incremental_release }}")) {
-            "${{ github.event.inputs.publish_incremental_release }}"
-          } else {
-            "true"
-          }
-          $baselineRef = if ("${{ github.event_name }}" -eq "workflow_dispatch") {
-            "${{ github.event.inputs.baseline_ref }}"
-          } else {
-            ""
-          }
-
-          ./scripts/Publish-Plonds.ps1 `
-            -Version $env:VERSION `
-            -AppArtifactsRoot (Join-Path $PWD "artifacts/app-payload") `
-            -InstallerArtifactsRoot (Join-Path $PWD "artifacts/installers") `
-            -OutputDir (Join-Path $PWD "plonds-output") `
-            -PrivateKeyPath $env:UPDATE_PRIVATE_KEY_PATH `
-            -Channel "stable" `
-            -S3Endpoint $env:S3_ENDPOINT `
-            -S3Bucket $env:S3_BUCKET `
-            -S3Region $env:S3_REGION `
-            -IncrementalStrategy $incrementalStrategy `
-            -PublishIncrementalRelease $publishIncrementalRelease `
-            -BaselineRef $baselineRef `
-            -GitHubRepository "${{ github.repository }}" `
-            -GitHubTag "${{ needs.prepare.outputs.tag }}" `
-            -MirrorInstallersToS3 "false" `
-            -UploadMetaToS3 "false"
-
-      - name: Upload PLONDS assets
-        uses: actions/upload-artifact@v4
-        with:
-          name: plonds-assets
-          path: |
-            plonds-output/release-assets/**
-            plonds-output/published/**
-          if-no-files-found: error
-          retention-days: 90
   github-release:
-    needs: [ prepare, build-windows, build-linux, build-macos, publish-plonds ]
+    needs: [prepare, build-windows, build-linux]
     runs-on: ubuntu-latest
     permissions:
       contents: write
 
     steps:
-      - name: Download installer artifacts
+      - name: Download release artifacts
         uses: actions/download-artifact@v4
         with:
-          path: artifacts/installers
+          path: release-files
-          pattern: installer-*
+          pattern: release-*
+          merge-multiple: true
 
-      - name: Download PLONDS artifacts
+      - name: Validate release files
-        uses: actions/download-artifact@v4
-        with:
-          path: artifacts/plonds
-          pattern: plonds-assets
-
-      - name: List artifacts structure
         run: |
-          echo "Artifact directory structure:"
+          echo "Release files:"
-          find artifacts -type f -o -type d | sort
+          find release-files -maxdepth 1 -type f -exec ls -lh {} \;
-          echo ""
-          echo "Files found:"
-          find artifacts -type f -exec ls -lh {} \;
-          echo ""
-          echo "Full tree:"
-          tree artifacts || find artifacts -print | sed -e 's;[^/]*/;|____;g;s;____|; |;g'
 
-      - name: Flatten artifacts for release
+          if [ ! -f release-files/files-windows-x64.zip ] || [ ! -f release-files/files-windows-x86.zip ] || [ ! -f release-files/files-linux-x64.zip ]; then
-        run: |
+            echo "Required payload zips are missing."
-          echo "Organizing artifacts..."
-          mkdir -p release-files
-          find artifacts/installers -type f \( -name "*.exe" -o -name "*.deb" -o -name "*.dmg" \) -exec cp -v {} release-files/ \;
-          find artifacts/plonds -type f \( -name "files-*.json" -o -name "files-*.json.sig" -o -name "update-*.zip" -o -name "plonds-*.json" -o -name "plonds-*.json.sig" -o -name "plonds-payload-*.zip" \) -exec cp -v {} release-files/ \;
-          echo ""
-          echo "Files ready for release:"
-          ls -lh release-files/ || echo "No files found in release-files"
-          echo ""
-          echo "Total files:"
-          file_count=$(find release-files -type f | wc -l)
-          echo "$file_count"
-          if [ "$file_count" -eq 0 ]; then
-            echo "Error: No release files found"
             exit 1
           fi
 
-      - name: Create Release
+          file_count=$(find release-files -maxdepth 1 -type f | wc -l)
+          if [ "$file_count" -eq 0 ]; then
+            echo "No release files were produced."
+            exit 1
+          fi
+
+      - name: Create or Update Release
         uses: ncipollo/release-action@v1
         with:
           tag: ${{ needs.prepare.outputs.tag }}
           name: ${{ needs.prepare.outputs.tag }}
-          commit: ${{ github.sha }}
           allowUpdates: true
           draft: false
-          prerelease: ${{ github.event.inputs.is_prerelease == 'true' }}
+          prerelease: ${{ needs.prepare.outputs.is_prerelease == 'true' }}
-          artifacts: "release-files/**"
+          artifacts: 'release-files/**'
           body: |
             ## Release ${{ needs.prepare.outputs.version }}
 
-            ### Windows
+            ### Installers
-            - **LanMountainDesktop-Setup-${{ needs.prepare.outputs.version }}-x64.exe** - 64-bit installer (includes .NET runtime)
+            - `LanMountainDesktop-Setup-${{ needs.prepare.outputs.version }}-x64.exe`
-            - **LanMountainDesktop-Setup-${{ needs.prepare.outputs.version }}-x86.exe** - 32-bit installer (includes .NET runtime)
+            - `LanMountainDesktop-Setup-${{ needs.prepare.outputs.version }}-x86.exe`
+            - `LanMountainDesktop_${{ needs.prepare.outputs.version }}_amd64.deb`
 
-            **Note:** The Launcher is now built with AOT (Ahead-of-Time) compilation as a single executable file for faster startup and smaller footprint.
+            ### Payload Archives
-
+            - `files-windows-x64.zip`
-            Installation: Double-click the .exe file and follow the wizard.
+            - `files-windows-x86.zip`
-
+            - `files-linux-x64.zip`
-            ### Incremental Update Assets
-            - **plonds-filemap-windows-x64.json / plonds-filemap-windows-x64.json.sig**
-            - **plonds-filemap-windows-x86.json / plonds-filemap-windows-x86.json.sig**
-            - **plonds-filemap-linux-x64.json / plonds-filemap-linux-x64.json.sig**
-            - **plonds-payload-windows-x64.zip**
-            - **plonds-payload-windows-x86.zip**
-            - **plonds-payload-linux-x64.zip**
-
-            ### Legacy Fallback Assets
-            - **files-windows-x64.json / files-windows-x64.json.sig / update-windows-x64.zip**
-            - **files-windows-x86.json / files-windows-x86.json.sig / update-windows-x86.zip**
-            - **files-linux-x64.json / files-linux-x64.json.sig / update-linux-x64.zip**
-
-            Existing users: Host will prefer staged PLONDS payloads and keep the Launcher responsible for apply + rollback. Legacy signed file-map assets remain attached as a fallback path.
-
-            ### Linux
-            - **LanMountainDesktop-${{ needs.prepare.outputs.version }}-linux-x64.deb** - Debian package (x64)
 
             ### macOS
-            - **LanMountainDesktop-${{ needs.prepare.outputs.version }}-macos-x64.dmg** - Intel processor
+            - macOS assets are best-effort and will not block the release.
-            - **LanMountainDesktop-${{ needs.prepare.outputs.version }}-macos-arm64.dmg** - Apple Silicon (M1/M2/M3)
 
-            See commits for changes.
+            Release keeps only the stable installer and payload outputs. PLONDS delta assets and external mirror metadata are generated by follow-up workflows.
           token: ${{ secrets.GITHUB_TOKEN }}
-
-  publish-plonds-meta:
-    needs: [ prepare, publish-plonds, github-release ]
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-    env:
-      S3_ENDPOINT: ${{ vars.S3_ENDPOINT }}
-      S3_BUCKET: ${{ vars.S3_BUCKET }}
-      S3_REGION: ${{ vars.S3_REGION }}
-      S3_ACCESS_KEY: ${{ secrets.S3_ACCESS_KEY }}
-      S3_SECRET_KEY: ${{ secrets.S3_SECRET_KEY }}
-      AWS_ACCESS_KEY_ID: ${{ secrets.S3_ACCESS_KEY }}
-      AWS_SECRET_ACCESS_KEY: ${{ secrets.S3_SECRET_KEY }}
-      AWS_DEFAULT_REGION: ${{ vars.S3_REGION }}
-      AWS_REGION: ${{ vars.S3_REGION }}
-      AWS_EC2_METADATA_DISABLED: "true"
-      AWS_REQUEST_CHECKSUM_CALCULATION: "WHEN_REQUIRED"
-      AWS_RESPONSE_CHECKSUM_VALIDATION: "WHEN_REQUIRED"
-
-    steps:
-      - name: Download PLONDS artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: artifacts/plonds
-          pattern: plonds-assets
-
-      - name: Publish PLONDS meta to S3
-        if: ${{ env.S3_ENDPOINT != '' && env.S3_BUCKET != '' && env.S3_ACCESS_KEY != '' && env.S3_SECRET_KEY != '' }}
-        shell: bash
-        run: |
-          set -euo pipefail
-          meta_dir="$(find artifacts/plonds -type d -path '*/published/meta' | head -n 1)"
-          if [ -z "${meta_dir}" ]; then
-            echo "Unable to locate published/meta inside PLONDS artifacts"
-            exit 1
-          fi
-
-          echo "Publishing PLONDS meta from ${meta_dir}"
-          aws --endpoint-url "$S3_ENDPOINT" --region "$S3_REGION" s3 cp "$meta_dir" "s3://$S3_BUCKET/lanmountain/update/meta/" --recursive --only-show-errors --no-progress

LanMountainDesktop.Launcher/Services/UpdateEngineService.cs

@@ -465,6 +465,7 @@ internal sealed class UpdateEngineService
             }
 
             File.Copy(sourcePath, targetPath, overwrite: true);
+            ApplyUnixFileModeIfPresent(targetPath, file);
             return;
         }
 
@@ -472,6 +473,7 @@ internal sealed class UpdateEngineService
         var objectBytes = File.ReadAllBytes(objectPath);
         var restoredBytes = TryInflateGzip(objectBytes) ?? objectBytes;
         File.WriteAllBytes(targetPath, restoredBytes);
+        ApplyUnixFileModeIfPresent(targetPath, file);
     }
 
     private void VerifyPlondsFileEntry(PlondsFileEntry file, string targetDeployment)
@@ -914,6 +916,29 @@ internal sealed class UpdateEngineService
             metadata["component"] = componentName;
         }
 
+        if (TryGetJsonPropertyIgnoreCase(node, "metadata", out var metadataNode) &&
+            metadataNode.ValueKind == JsonValueKind.Object)
+        {
+            foreach (var property in metadataNode.EnumerateObject())
+            {
+                if (property.Value.ValueKind == JsonValueKind.Null ||
+                    property.Value.ValueKind == JsonValueKind.Undefined)
+                {
+                    continue;
+                }
+
+                var value = property.Value.ValueKind == JsonValueKind.String
+                    ? property.Value.GetString()
+                    : property.Value.ToString();
+                if (string.IsNullOrWhiteSpace(value))
+                {
+                    continue;
+                }
+
+                metadata[property.Name] = value;
+            }
+        }
+
         entry = new PlondsFileEntry
         {
             Path = path,
@@ -954,6 +979,31 @@ internal sealed class UpdateEngineService
         return true;
     }
 
+    private static void ApplyUnixFileModeIfPresent(string targetPath, PlondsFileEntry file)
+    {
+        if (OperatingSystem.IsWindows())
+        {
+            return;
+        }
+
+        if (!file.Metadata.TryGetValue("unixFileMode", out var rawMode) ||
+            string.IsNullOrWhiteSpace(rawMode))
+        {
+            return;
+        }
+
+        try
+        {
+            var normalized = rawMode.Trim();
+            var modeValue = Convert.ToInt32(normalized, 8);
+            File.SetUnixFileMode(targetPath, (UnixFileMode)modeValue);
+        }
+        catch
+        {
+            // Best-effort only. A bad mode should not break the entire update.
+        }
+    }
+
     private static bool TryGetJsonPropertyIgnoreCase(JsonElement node, string propertyName, out JsonElement value)
     {
         if (node.ValueKind == JsonValueKind.Object)

LanMountainDesktop/Services/GitHubReleaseUpdateService.cs

@@ -44,7 +44,10 @@ public sealed record PlondsUpdatePayload(
     string? FileMapJson,
     string? FileMapSignature,
     string? FileMapJsonUrl,
-    string? FileMapSignatureUrl);
+    string? FileMapSignatureUrl,
+    string? UpdateArchiveUrl = null,
+    string? UpdateArchiveSha256 = null,
+    long? UpdateArchiveSizeBytes = null);
 
 public sealed record UpdateDownloadResult(
     bool Success,
@@ -159,6 +162,9 @@ public sealed class GitHubReleaseUpdateService : IDisposable
             var preferredAsset = isUpdateAvailable
                 ? SelectPreferredInstallerAsset(release.Assets)
                 : null;
+            var plondsPayload = isUpdateAvailable
+                ? TryResolvePlondsPayload(release)
+                : null;
 
             return new UpdateCheckResult(
                 Success: true,
@@ -167,7 +173,8 @@ public sealed class GitHubReleaseUpdateService : IDisposable
                 LatestVersionText: latestVersionText,
                 Release: release,
                 PreferredAsset: preferredAsset,
-                ErrorMessage: null);
+                ErrorMessage: null,
+                PlondsPayload: plondsPayload);
         }
         catch (OperationCanceledException)
         {
@@ -232,6 +239,7 @@ public sealed class GitHubReleaseUpdateService : IDisposable
                 : release.TagName;
 
             var preferredAsset = SelectPreferredInstallerAsset(release.Assets);
+            var plondsPayload = TryResolvePlondsPayload(release);
 
             return new UpdateCheckResult(
                 Success: true,
@@ -241,7 +249,8 @@ public sealed class GitHubReleaseUpdateService : IDisposable
                 Release: release,
                 PreferredAsset: preferredAsset,
                 ErrorMessage: null,
-                ForceMode: true);
+                ForceMode: true,
+                PlondsPayload: plondsPayload);
         }
         catch (OperationCanceledException)
         {
@@ -652,7 +661,7 @@ public sealed class GitHubReleaseUpdateService : IDisposable
 
     private static GitHubReleaseAsset? SelectPreferredInstallerAsset(IReadOnlyList<GitHubReleaseAsset> assets)
     {
-        if (assets is null || assets.Count == 0 || !OperatingSystem.IsWindows())
+        if (assets is null || assets.Count == 0)
         {
             return null;
         }
@@ -664,12 +673,95 @@ public sealed class GitHubReleaseUpdateService : IDisposable
             _ => "x64"
         };
 
-        var ranked = assets
+        if (OperatingSystem.IsWindows())
-            .Select(asset => (Asset: asset, Score: ScoreWindowsInstallerAsset(asset.Name, architectureToken)))
+        {
-            .OrderByDescending(x => x.Score)
+            return assets
-            .ToList();
+                .Select(asset => (Asset: asset, Score: ScoreWindowsInstallerAsset(asset.Name, architectureToken)))
+                .OrderByDescending(x => x.Score)
+                .FirstOrDefault(x => x.Score > 0)
+                .Asset;
+        }
 
-        return ranked.FirstOrDefault(x => x.Score > 0).Asset;
+        if (OperatingSystem.IsLinux())
+        {
+            return assets
+                .Select(asset => (Asset: asset, Score: ScoreLinuxInstallerAsset(asset.Name, architectureToken)))
+                .OrderByDescending(x => x.Score)
+                .FirstOrDefault(x => x.Score > 0)
+                .Asset;
+        }
+
+        if (OperatingSystem.IsMacOS())
+        {
+            return assets
+                .Select(asset => (Asset: asset, Score: ScoreMacInstallerAsset(asset.Name, architectureToken)))
+                .OrderByDescending(x => x.Score)
+                .FirstOrDefault(x => x.Score > 0)
+                .Asset;
+        }
+
+        return null;
+    }
+
+    private static PlondsUpdatePayload? TryResolvePlondsPayload(GitHubReleaseInfo release)
+    {
+        if (release.Assets is null || release.Assets.Count == 0)
+        {
+            return null;
+        }
+
+        var platformSuffix = GetPlatformAssetSuffix();
+        var fileMapAsset = FindAsset(release.Assets, $"plonds-filemap-{platformSuffix}.json");
+        var signatureAsset = FindAsset(release.Assets, $"plonds-filemap-{platformSuffix}.json.sig")
+                             ?? FindAsset(release.Assets, $"plonds-filemap-{platformSuffix}.sig");
+        var archiveAsset = FindAsset(release.Assets, $"update-{platformSuffix}.zip");
+        if (fileMapAsset is null || signatureAsset is null || archiveAsset is null)
+        {
+            return null;
+        }
+
+        var distributionId = $"plonds-{release.TagName.Trim().TrimStart('v')}-{platformSuffix}";
+        var channelId = release.IsPrerelease
+            ? UpdateSettingsValues.ChannelPreview
+            : UpdateSettingsValues.ChannelStable;
+
+        return new PlondsUpdatePayload(
+            DistributionId: distributionId,
+            ChannelId: channelId,
+            SubChannel: platformSuffix,
+            FileMapJson: null,
+            FileMapSignature: null,
+            FileMapJsonUrl: fileMapAsset.BrowserDownloadUrl,
+            FileMapSignatureUrl: signatureAsset.BrowserDownloadUrl,
+            UpdateArchiveUrl: archiveAsset.BrowserDownloadUrl,
+            UpdateArchiveSha256: archiveAsset.Sha256,
+            UpdateArchiveSizeBytes: archiveAsset.SizeBytes > 0 ? archiveAsset.SizeBytes : null);
+    }
+
+    private static GitHubReleaseAsset? FindAsset(IReadOnlyList<GitHubReleaseAsset> assets, string assetName)
+    {
+        return assets.FirstOrDefault(asset => string.Equals(asset.Name, assetName, StringComparison.OrdinalIgnoreCase));
+    }
+
+    private static string GetPlatformAssetSuffix()
+    {
+        var os = OperatingSystem.IsWindows()
+            ? "windows"
+            : OperatingSystem.IsLinux()
+                ? "linux"
+                : OperatingSystem.IsMacOS()
+                    ? "macos"
+                    : "unknown";
+
+        var arch = RuntimeInformation.OSArchitecture switch
+        {
+            Architecture.X86 => "x86",
+            Architecture.Arm => "arm",
+            Architecture.Arm64 => "arm64",
+            _ => "x64"
+        };
+
+        return $"{os}-{arch}";
     }
 
     private static int ScoreWindowsInstallerAsset(string assetName, string architectureToken)
@@ -719,6 +811,94 @@ public sealed class GitHubReleaseUpdateService : IDisposable
         return score;
     }
 
+    private static int ScoreLinuxInstallerAsset(string assetName, string architectureToken)
+    {
+        if (string.IsNullOrWhiteSpace(assetName))
+        {
+            return 0;
+        }
+
+        var score = 0;
+
+        if (assetName.EndsWith(".deb", StringComparison.OrdinalIgnoreCase))
+        {
+            score += 220;
+        }
+        else if (assetName.EndsWith(".rpm", StringComparison.OrdinalIgnoreCase))
+        {
+            score += 180;
+        }
+        else if (assetName.EndsWith(".AppImage", StringComparison.OrdinalIgnoreCase))
+        {
+            score += 160;
+        }
+        else
+        {
+            return 0;
+        }
+
+        if (assetName.Contains("linux", StringComparison.OrdinalIgnoreCase))
+        {
+            score += 40;
+        }
+
+        if (assetName.Contains(architectureToken, StringComparison.OrdinalIgnoreCase) ||
+            (architectureToken == "x64" && assetName.Contains("amd64", StringComparison.OrdinalIgnoreCase)))
+        {
+            score += 40;
+        }
+        else if (assetName.Contains("x64", StringComparison.OrdinalIgnoreCase) ||
+                 assetName.Contains("amd64", StringComparison.OrdinalIgnoreCase) ||
+                 assetName.Contains("x86", StringComparison.OrdinalIgnoreCase) ||
+                 assetName.Contains("arm64", StringComparison.OrdinalIgnoreCase))
+        {
+            score -= 30;
+        }
+
+        return score;
+    }
+
+    private static int ScoreMacInstallerAsset(string assetName, string architectureToken)
+    {
+        if (string.IsNullOrWhiteSpace(assetName))
+        {
+            return 0;
+        }
+
+        var score = 0;
+
+        if (assetName.EndsWith(".dmg", StringComparison.OrdinalIgnoreCase))
+        {
+            score += 220;
+        }
+        else if (assetName.EndsWith(".pkg", StringComparison.OrdinalIgnoreCase))
+        {
+            score += 180;
+        }
+        else
+        {
+            return 0;
+        }
+
+        if (assetName.Contains("mac", StringComparison.OrdinalIgnoreCase) ||
+            assetName.Contains("osx", StringComparison.OrdinalIgnoreCase))
+        {
+            score += 40;
+        }
+
+        if (assetName.Contains(architectureToken, StringComparison.OrdinalIgnoreCase))
+        {
+            score += 40;
+        }
+        else if (assetName.Contains("x64", StringComparison.OrdinalIgnoreCase) ||
+                 assetName.Contains("arm64", StringComparison.OrdinalIgnoreCase))
+        {
+            score -= 30;
+        }
+
+        return score;
+    }
+
     private static bool TryParseVersion(string? value, out Version? version)
     {
         version = null;

LanMountainDesktop/Services/PlondsReleaseUpdateService.cs

@@ -1,52 +1,17 @@
-using System;
+using System;
-using System.Collections.Generic;
-using System.Globalization;
-using System.Linq;
-using System.Net;
-using System.Net.Http;
-using System.Runtime.InteropServices;
-using System.Text.Json;
 using System.Threading;
 using System.Threading.Tasks;
 
 namespace LanMountainDesktop.Services;
 
 /// <summary>
-/// Thin PLONDS client used by the host app.
+/// Release-backed PLONDS checker.
-/// The host keeps responsibility for checking and downloading updates; Launcher only applies staged payloads.
+/// It only succeeds when the latest GitHub Release already exposes platform PLONDS assets.
+/// If those assets are not ready yet, callers can fall back to the normal GitHub installer flow.
 /// </summary>
 public sealed class PlondsReleaseUpdateService : IDisposable
 {
-    private const string DefaultApiBasePath = "/api/plonds/v1";
+    private readonly GitHubReleaseUpdateService _githubReleaseUpdateService = new("wwiinnddyy", "LanMountainDesktop");
-    private const int MaxTransientRetryAttempts = 3;
-
-    private readonly HttpClient _httpClient;
-    private readonly bool _ownsHttpClient;
-
-    public PlondsReleaseUpdateService(HttpClient? httpClient = null)
-    {
-        if (httpClient is null)
-        {
-            _httpClient = new HttpClient
-            {
-                Timeout = TimeSpan.FromSeconds(20)
-            };
-            _ownsHttpClient = true;
-        }
-        else
-        {
-            _httpClient = httpClient;
-            _ownsHttpClient = false;
-        }
-    }
-
-    public void Dispose()
-    {
-        if (_ownsHttpClient)
-        {
-            _httpClient.Dispose();
-        }
-    }
 
     public Task<UpdateCheckResult> CheckForUpdatesAsync(
         Version currentVersion,
@@ -64,829 +29,52 @@ public sealed class PlondsReleaseUpdateService : IDisposable
         return CheckForUpdatesCoreAsync(currentVersion, includePrerelease, isForce: true, cancellationToken);
     }
 
+    public void Dispose()
+    {
+        _githubReleaseUpdateService.Dispose();
+    }
+
     private async Task<UpdateCheckResult> CheckForUpdatesCoreAsync(
         Version currentVersion,
         bool includePrerelease,
         bool isForce,
         CancellationToken cancellationToken)
     {
-        var normalizedCurrentVersion = NormalizeVersion(currentVersion);
+        var releaseResult = isForce
-        var normalizedCurrentVersionText = FormatVersionText(normalizedCurrentVersion);
+            ? await _githubReleaseUpdateService.ForceCheckForUpdatesAsync(currentVersion, includePrerelease, cancellationToken)
-        var endpoint = ResolveEndpoint();
+            : await _githubReleaseUpdateService.CheckForUpdatesAsync(currentVersion, includePrerelease, cancellationToken);
-        var latestVersionText = "-";
 
-        if (string.IsNullOrWhiteSpace(endpoint))
+        if (!releaseResult.Success)
         {
-            return new UpdateCheckResult(
+            return releaseResult;
-                Success: false,
-                IsUpdateAvailable: false,
-                CurrentVersionText: normalizedCurrentVersionText,
-                LatestVersionText: latestVersionText,
-                Release: null,
-                PreferredAsset: null,
-                ErrorMessage: "PLONDS endpoint is not configured.",
-                ForceMode: isForce);
         }
 
-        try
+        if (!isForce && !releaseResult.IsUpdateAvailable)
         {
-            var apiBasePath = ResolveApiBasePath();
+            return releaseResult with { ForceMode = false };
-            var metadataUrl = BuildApiUrl(endpoint, apiBasePath, "metadata");
-            var channelId = ResolveChannelId(includePrerelease);
-            var platform = ResolvePlatform();
-            var latestUrl = BuildApiUrl(
-                endpoint,
-                apiBasePath,
-                $"channels/{Uri.EscapeDataString(channelId)}/{Uri.EscapeDataString(platform)}/latest?currentVersion={Uri.EscapeDataString(normalizedCurrentVersionText)}");
-
-            _ = await GetJsonNodeWithRetryAsync(metadataUrl, PlondsCheckStage.Metadata, cancellationToken).ConfigureAwait(false);
-
-            var latestDescriptor = await GetLatestDescriptorAsync(
-                latestUrl,
-                allowNoUpdateResponse: true,
-                cancellationToken).ConfigureAwait(false);
-
-            if (latestDescriptor is null)
-            {
-                return new UpdateCheckResult(
-                    Success: true,
-                    IsUpdateAvailable: false,
-                    CurrentVersionText: normalizedCurrentVersionText,
-                    LatestVersionText: normalizedCurrentVersionText,
-                    Release: null,
-                    PreferredAsset: null,
-                    ErrorMessage: null,
-                    ForceMode: isForce);
-            }
-
-            latestVersionText = latestDescriptor.VersionText;
-            var hasUpdate = latestDescriptor.Version > normalizedCurrentVersion;
-            if (!isForce && !hasUpdate)
-            {
-                return new UpdateCheckResult(
-                    Success: true,
-                    IsUpdateAvailable: false,
-                    CurrentVersionText: normalizedCurrentVersionText,
-                    LatestVersionText: latestVersionText,
-                    Release: null,
-                    PreferredAsset: null,
-                    ErrorMessage: null,
-                    ForceMode: false);
-            }
-
-            var distribution = await ResolveDistributionAsync(
-                endpoint,
-                apiBasePath,
-                latestUrl,
-                latestDescriptor,
-                channelId,
-                platform,
-                cancellationToken).ConfigureAwait(false);
-
-            latestVersionText = distribution.Latest.VersionText;
-
-            var publishedAt = ParsePublishedAt(distribution.DistributionNode) ?? DateTimeOffset.UtcNow;
-            var release = new GitHubReleaseInfo(
-                TagName: $"v{distribution.Latest.VersionText}",
-                Name: $"PLONDS Distribution {distribution.Latest.VersionText}",
-                IsPrerelease: includePrerelease,
-                IsDraft: false,
-                PublishedAt: publishedAt,
-                Assets: distribution.Assets);
-
-            return new UpdateCheckResult(
-                Success: true,
-                IsUpdateAvailable: true,
-                CurrentVersionText: normalizedCurrentVersionText,
-                LatestVersionText: distribution.Latest.VersionText,
-                Release: release,
-                PreferredAsset: SelectPreferredInstallerAsset(distribution.Assets),
-                ErrorMessage: null,
-                ForceMode: isForce,
-                PlondsPayload: distribution.Payload);
-        }
-        catch (OperationCanceledException)
-        {
-            throw;
-        }
-        catch (PlondsRequestException ex)
-        {
-            AppLogger.Warn(
-                "PLONDS",
-                $"PLONDS {GetStageName(ex.Stage)} stage failed. {ex.Message}",
-                ex);
-
-            return new UpdateCheckResult(
-                Success: false,
-                IsUpdateAvailable: false,
-                CurrentVersionText: normalizedCurrentVersionText,
-                LatestVersionText: latestVersionText,
-                Release: null,
-                PreferredAsset: null,
-                ErrorMessage: $"PLONDS {GetStageName(ex.Stage)} failed: {ex.Message}",
-                ForceMode: isForce);
-        }
-        catch (Exception ex)
-        {
-            AppLogger.Warn("PLONDS", "PLONDS request failed with an unexpected error.", ex);
-
-            return new UpdateCheckResult(
-                Success: false,
-                IsUpdateAvailable: false,
-                CurrentVersionText: normalizedCurrentVersionText,
-                LatestVersionText: latestVersionText,
-                Release: null,
-                PreferredAsset: null,
-                ErrorMessage: $"PLONDS request failed: {ex.Message}",
-                ForceMode: isForce);
-        }
-    }
-
-    private async Task<LatestDescriptor?> GetLatestDescriptorAsync(
-        string latestUrl,
-        bool allowNoUpdateResponse,
-        CancellationToken cancellationToken)
-    {
-        try
-        {
-            var latestNode = await GetJsonNodeWithRetryAsync(
-                latestUrl,
-                PlondsCheckStage.Latest,
-                cancellationToken).ConfigureAwait(false);
-
-            return ParseLatestDescriptor(latestNode);
-        }
-        catch (PlondsRequestException ex)
-            when (allowNoUpdateResponse &&
-                  ex.Stage == PlondsCheckStage.Latest &&
-                  ex.StatusCode == HttpStatusCode.NoContent)
-        {
-            return null;
-        }
-    }
-
-    private async Task<DistributionDescriptor> ResolveDistributionAsync(
-        string endpoint,
-        string apiBasePath,
-        string latestUrl,
-        LatestDescriptor latest,
-        string channelId,
-        string platform,
-        CancellationToken cancellationToken)
-    {
-        var currentLatest = latest;
-        var hasRefreshedLatest = false;
-
-        while (true)
-        {
-            var distributionUrl = BuildApiUrl(
-                endpoint,
-                apiBasePath,
-                $"distributions/{Uri.EscapeDataString(currentLatest.DistributionId)}");
-
-            try
-            {
-                var distributionNode = await GetJsonNodeWithRetryAsync(
-                    distributionUrl,
-                    PlondsCheckStage.Distribution,
-                    cancellationToken).ConfigureAwait(false);
-
-                if (TryCreateDistributionDescriptor(
-                        distributionNode,
-                        currentLatest,
-                        channelId,
-                        platform,
-                        out var descriptor,
-                        out var descriptorError))
-                {
-                    return descriptor;
-                }
-
-                if (hasRefreshedLatest || descriptorError is null || !IsRecoverableDistributionError(descriptorError))
-                {
-                    throw descriptorError ?? new PlondsRequestException(
-                        PlondsCheckStage.PayloadParse,
-                        "PLONDS distribution payload is incomplete.");
-                }
-
-                AppLogger.Warn(
-                    "PLONDS",
-                    $"PLONDS distribution '{currentLatest.DistributionId}' is incomplete. Refreshing latest pointer once before failing.");
-            }
-            catch (PlondsRequestException ex) when (!hasRefreshedLatest && IsRecoverableDistributionError(ex))
-            {
-                AppLogger.Warn(
-                    "PLONDS",
-                    $"PLONDS distribution fetch for '{currentLatest.DistributionId}' failed during {GetStageName(ex.Stage)}. Refreshing latest pointer once. Details: {ex.Message}");
-            }
-
-            hasRefreshedLatest = true;
-            currentLatest = await GetLatestDescriptorAsync(
-                latestUrl,
-                allowNoUpdateResponse: false,
-                cancellationToken).ConfigureAwait(false)
-                ?? throw new PlondsRequestException(
-                    PlondsCheckStage.Latest,
-                    "PLONDS latest pointer disappeared while recovering the distribution payload.");
-        }
-    }
-
-    private async Task<JsonElement> GetJsonNodeWithRetryAsync(
-        string url,
-        PlondsCheckStage stage,
-        CancellationToken cancellationToken)
-    {
-        PlondsRequestException? lastError = null;
-
-        for (var attempt = 1; attempt <= MaxTransientRetryAttempts; attempt++)
-        {
-            try
-            {
-                return await GetJsonNodeAsync(url, stage, cancellationToken).ConfigureAwait(false);
-            }
-            catch (PlondsRequestException ex) when (attempt < MaxTransientRetryAttempts && ex.IsTransient)
-            {
-                lastError = ex;
-                AppLogger.Warn(
-                    "PLONDS",
-                    $"PLONDS {GetStageName(stage)} attempt {attempt}/{MaxTransientRetryAttempts} failed. Retrying shortly. Details: {ex.Message}");
-                await Task.Delay(GetRetryDelay(attempt), cancellationToken).ConfigureAwait(false);
-            }
         }
 
-        throw lastError ?? new PlondsRequestException(stage, "PLONDS request failed before a response was returned.");
+        if (releaseResult.PlondsPayload is not null)
-    }
-
-    private async Task<JsonElement> GetJsonNodeAsync(
-        string url,
-        PlondsCheckStage stage,
-        CancellationToken cancellationToken)
-    {
-        using var request = new HttpRequestMessage(HttpMethod.Get, url);
-        var token = ResolveToken();
-        if (!string.IsNullOrWhiteSpace(token))
         {
-            request.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", token);
+            return releaseResult with { ForceMode = isForce };
         }
 
-        HttpResponseMessage response;
+        var latestVersion = string.IsNullOrWhiteSpace(releaseResult.LatestVersionText)
-        try
+            ? "-"
-        {
+            : releaseResult.LatestVersionText;
-            response = await _httpClient.SendAsync(request, cancellationToken).ConfigureAwait(false);
+        var message = releaseResult.Release is null
-        }
+            ? "GitHub Release data is unavailable for PLONDS."
-        catch (OperationCanceledException ex) when (!cancellationToken.IsCancellationRequested)
+            : $"Release {latestVersion} does not expose platform PLONDS assets yet.";
-        {
+
-            throw new PlondsRequestException(stage, "Request timed out.", isTransient: true, innerException: ex);
+        return new UpdateCheckResult(
-        }
+            Success: false,
-        catch (HttpRequestException ex)
+            IsUpdateAvailable: releaseResult.IsUpdateAvailable,
-        {
+            CurrentVersionText: releaseResult.CurrentVersionText,
-            throw new PlondsRequestException(stage, $"Network error: {ex.Message}", isTransient: true, innerException: ex);
+            LatestVersionText: latestVersion,
-        }
+            Release: releaseResult.Release,
-
+            PreferredAsset: releaseResult.PreferredAsset,
-        using (response)
+            ErrorMessage: message,
-        {
+            ForceMode: isForce,
-            var body = await response.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
+            PlondsPayload: null);
-            if (response.StatusCode == HttpStatusCode.NoContent)
-            {
-                throw new PlondsRequestException(
-                    stage,
-                    "HTTP 204: no content.",
-                    statusCode: response.StatusCode,
-                    isTransient: false);
-            }
-
-            if (!response.IsSuccessStatusCode)
-            {
-                throw new PlondsRequestException(
-                    stage,
-                    $"HTTP {(int)response.StatusCode}: {Truncate(body, 180)}",
-                    statusCode: response.StatusCode,
-                    isTransient: IsTransientStatusCode(response.StatusCode));
-            }
-
-            try
-            {
-                using var document = JsonDocument.Parse(body);
-                var root = document.RootElement;
-                if (root.ValueKind == JsonValueKind.Object &&
-                    root.TryGetProperty("content", out var content))
-                {
-                    return content.Clone();
-                }
-
-                return root.Clone();
-            }
-            catch (JsonException ex)
-            {
-                throw new PlondsRequestException(
-                    stage,
-                    $"Invalid JSON response: {ex.Message}",
-                    isTransient: IsLikelyIncompleteJson(body),
-                    innerException: ex);
-            }
-        }
-    }
-
-    private static LatestDescriptor ParseLatestDescriptor(JsonElement latestNode)
-    {
-        var latestVersionText = ReadString(latestNode, "version") ?? "-";
-        if (!TryParseVersion(latestVersionText, out var latestVersion) || latestVersion is null)
-        {
-            throw new PlondsRequestException(
-                PlondsCheckStage.Latest,
-                $"PLONDS latest distribution version is invalid: '{latestVersionText}'.");
-        }
-
-        var distributionId = ReadString(latestNode, "distributionId");
-        if (string.IsNullOrWhiteSpace(distributionId))
-        {
-            throw new PlondsRequestException(
-                PlondsCheckStage.Latest,
-                "PLONDS latest distribution id is missing.");
-        }
-
-        return new LatestDescriptor(distributionId, latestVersionText, latestVersion);
-    }
-
-    private static bool TryCreateDistributionDescriptor(
-        JsonElement distributionNode,
-        LatestDescriptor latest,
-        string channelId,
-        string platform,
-        out DistributionDescriptor descriptor,
-        out PlondsRequestException? error)
-    {
-        descriptor = default!;
-        error = null;
-
-        var assets = ResolveInstallerAssets(distributionNode);
-        var payload = ResolvePlondsPayload(
-            distributionNode,
-            latest.DistributionId,
-            channelId,
-            platform);
-
-        if (assets.Count == 0 && !HasPlondsPayload(payload))
-        {
-            error = new PlondsRequestException(
-                PlondsCheckStage.PayloadParse,
-                "PLONDS distribution response does not expose downloadable update assets.");
-            return false;
-        }
-
-        descriptor = new DistributionDescriptor(latest, distributionNode, assets, payload);
-        return true;
-    }
-
-    private static bool IsRecoverableDistributionError(PlondsRequestException error)
-    {
-        if (error.Stage == PlondsCheckStage.PayloadParse)
-        {
-            return true;
-        }
-
-        return error.Stage == PlondsCheckStage.Distribution &&
-               (error.StatusCode == HttpStatusCode.NotFound ||
-                error.StatusCode == HttpStatusCode.RequestTimeout ||
-                error.StatusCode == HttpStatusCode.TooManyRequests ||
-                error.StatusCode is >= HttpStatusCode.InternalServerError);
-    }
-
-    private static IReadOnlyList<GitHubReleaseAsset> ResolveInstallerAssets(JsonElement distributionNode)
-    {
-        var assets = new List<GitHubReleaseAsset>();
-
-        if (TryGetPropertyIgnoreCase(distributionNode, "installerMirrors", out var installersNode) &&
-            installersNode.ValueKind == JsonValueKind.Array)
-        {
-            foreach (var installerNode in installersNode.EnumerateArray())
-            {
-                if (installerNode.ValueKind != JsonValueKind.Object)
-                {
-                    continue;
-                }
-
-                var name = ReadString(installerNode, "name")
-                           ?? ReadString(installerNode, "fileName");
-                var url = ReadString(installerNode, "url") ?? ReadString(installerNode, "downloadUrl");
-                if (string.IsNullOrWhiteSpace(name) || string.IsNullOrWhiteSpace(url))
-                {
-                    continue;
-                }
-
-                var size = ReadInt64(installerNode, "size") ?? 0L;
-                var sha256 = ReadString(installerNode, "sha256");
-                assets.Add(new GitHubReleaseAsset(name, url, size, sha256));
-            }
-        }
-
-        if (assets.Count > 0)
-        {
-            return assets;
-        }
-
-        if (TryGetPropertyIgnoreCase(distributionNode, "assets", out var assetsNode) &&
-            assetsNode.ValueKind == JsonValueKind.Array)
-        {
-            foreach (var assetNode in assetsNode.EnumerateArray())
-            {
-                if (assetNode.ValueKind != JsonValueKind.Object)
-                {
-                    continue;
-                }
-
-                var name = ReadString(assetNode, "name");
-                var url = ReadString(assetNode, "url")
-                          ?? ReadString(assetNode, "downloadUrl")
-                          ?? ReadString(assetNode, "browserDownloadUrl");
-                if (string.IsNullOrWhiteSpace(name) || string.IsNullOrWhiteSpace(url))
-                {
-                    continue;
-                }
-
-                var size = ReadInt64(assetNode, "size") ?? 0L;
-                var sha256 = ReadString(assetNode, "sha256");
-                assets.Add(new GitHubReleaseAsset(name, url, size, sha256));
-            }
-        }
-
-        return assets;
-    }
-
-    private static PlondsUpdatePayload ResolvePlondsPayload(
-        JsonElement distributionNode,
-        string distributionId,
-        string channelId,
-        string platform)
-    {
-        var fileMapJson = ReadString(distributionNode, "fileMapJson");
-        var fileMapSignature = ReadString(distributionNode, "fileMapSignature");
-        var fileMapJsonUrl = ReadString(distributionNode, "fileMapJsonUrl")
-                             ?? ReadString(distributionNode, "fileMapUrl")
-                             ?? ReadString(distributionNode, "manifestUrl");
-        var fileMapSignatureUrl = ReadString(distributionNode, "fileMapSignatureUrl")
-                                  ?? ReadString(distributionNode, "signatureUrl");
-
-        return new PlondsUpdatePayload(
-            DistributionId: distributionId,
-            ChannelId: channelId,
-            SubChannel: platform,
-            FileMapJson: fileMapJson,
-            FileMapSignature: fileMapSignature,
-            FileMapJsonUrl: fileMapJsonUrl,
-            FileMapSignatureUrl: fileMapSignatureUrl);
-    }
-
-    private static bool HasPlondsPayload(PlondsUpdatePayload payload)
-    {
-        return !string.IsNullOrWhiteSpace(payload.FileMapJson)
-               || !string.IsNullOrWhiteSpace(payload.FileMapJsonUrl);
-    }
-
-    private static GitHubReleaseAsset? SelectPreferredInstallerAsset(IReadOnlyList<GitHubReleaseAsset> assets)
-    {
-        if (assets is null || assets.Count == 0)
-        {
-            return null;
-        }
-
-        if (OperatingSystem.IsWindows())
-        {
-            var archToken = RuntimeInformation.OSArchitecture switch
-            {
-                Architecture.Arm64 => "arm64",
-                Architecture.X86 => "x86",
-                _ => "x64"
-            };
-
-            return assets
-                .Select(asset => (Asset: asset, Score: ScoreInstallerAsset(asset.Name, ".exe", ".msi", archToken)))
-                .OrderByDescending(x => x.Score)
-                .FirstOrDefault(x => x.Score > 0)
-                .Asset;
-        }
-
-        if (OperatingSystem.IsLinux())
-        {
-            return assets
-                .Select(asset => (Asset: asset, Score: ScoreInstallerAsset(asset.Name, ".deb", ".rpm", "x64")))
-                .OrderByDescending(x => x.Score)
-                .FirstOrDefault(x => x.Score > 0)
-                .Asset;
-        }
-
-        if (OperatingSystem.IsMacOS())
-        {
-            var archToken = RuntimeInformation.OSArchitecture == Architecture.Arm64 ? "arm64" : "x64";
-            return assets
-                .Select(asset => (Asset: asset, Score: ScoreInstallerAsset(asset.Name, ".dmg", ".pkg", archToken)))
-                .OrderByDescending(x => x.Score)
-                .FirstOrDefault(x => x.Score > 0)
-                .Asset;
-        }
-
-        return null;
-    }
-
-    private static int ScoreInstallerAsset(string name, string ext1, string ext2, string archToken)
-    {
-        if (string.IsNullOrWhiteSpace(name))
-        {
-            return 0;
-        }
-
-        var score = 0;
-        if (name.EndsWith(ext1, StringComparison.OrdinalIgnoreCase))
-        {
-            score += 200;
-        }
-        else if (name.EndsWith(ext2, StringComparison.OrdinalIgnoreCase))
-        {
-            score += 160;
-        }
-        else
-        {
-            return 0;
-        }
-
-        if (name.Contains("setup", StringComparison.OrdinalIgnoreCase) ||
-            name.Contains("installer", StringComparison.OrdinalIgnoreCase))
-        {
-            score += 50;
-        }
-
-        if (name.Contains(archToken, StringComparison.OrdinalIgnoreCase))
-        {
-            score += 40;
-        }
-
-        if (name.Contains("portable", StringComparison.OrdinalIgnoreCase))
-        {
-            score -= 30;
-        }
-
-        return score;
-    }
-
-    private static string ResolveChannelId(bool includePrerelease)
-    {
-        return includePrerelease
-            ? UpdateSettingsValues.ChannelPreview
-            : UpdateSettingsValues.ChannelStable;
-    }
-
-    private static string ResolvePlatform()
-    {
-        var os = OperatingSystem.IsWindows()
-            ? "windows"
-            : OperatingSystem.IsLinux()
-                ? "linux"
-                : OperatingSystem.IsMacOS()
-                    ? "macos"
-                    : "unknown";
-
-        var arch = RuntimeInformation.OSArchitecture switch
-        {
-            Architecture.X86 => "x86",
-            Architecture.Arm => "arm",
-            Architecture.Arm64 => "arm64",
-            _ => "x64"
-        };
-
-        return $"{os}-{arch}";
-    }
-
-    private static string? ResolveEndpoint()
-    {
-        var endpoint = Environment.GetEnvironmentVariable("LANMOUNTAIN_PLONDS_ENDPOINT")
-                      ?? Environment.GetEnvironmentVariable("PLONDS_ENDPOINT");
-        return string.IsNullOrWhiteSpace(endpoint) ? null : endpoint.Trim().TrimEnd('/');
-    }
-
-    private static string? ResolveToken()
-    {
-        var token = Environment.GetEnvironmentVariable("LANMOUNTAIN_PLONDS_TOKEN")
-                    ?? Environment.GetEnvironmentVariable("PLONDS_TOKEN");
-        return string.IsNullOrWhiteSpace(token) ? null : token.Trim();
-    }
-
-    private static string ResolveApiBasePath()
-    {
-        var configured = Environment.GetEnvironmentVariable("LANMOUNTAIN_PLONDS_API_BASE_PATH")
-                         ?? Environment.GetEnvironmentVariable("PLONDS_API_BASE_PATH");
-        if (string.IsNullOrWhiteSpace(configured))
-        {
-            return DefaultApiBasePath;
-        }
-
-        var normalized = configured.Trim();
-        return normalized.StartsWith("/", StringComparison.Ordinal) ? normalized : "/" + normalized;
-    }
-
-    private static string BuildApiUrl(string endpoint, string apiBasePath, string relativePath)
-    {
-        return $"{endpoint.TrimEnd('/')}/{apiBasePath.Trim('/').TrimEnd('/')}/{relativePath.TrimStart('/')}";
-    }
-
-    private static string? ReadString(JsonElement node, string propertyName)
-    {
-        if (!TryGetPropertyIgnoreCase(node, propertyName, out var value))
-        {
-            return null;
-        }
-
-        return value.ValueKind == JsonValueKind.String
-            ? value.GetString()
-            : value.ValueKind is JsonValueKind.Null or JsonValueKind.Undefined
-                ? null
-                : value.ToString();
-    }
-
-    private static long? ReadInt64(JsonElement node, string propertyName)
-    {
-        if (!TryGetPropertyIgnoreCase(node, propertyName, out var value))
-        {
-            return null;
-        }
-
-        if (value.TryGetInt64(out var number))
-        {
-            return number;
-        }
-
-        var text = value.ToString();
-        return long.TryParse(text, NumberStyles.Integer, CultureInfo.InvariantCulture, out var parsed)
-            ? parsed
-            : null;
-    }
-
-    private static DateTimeOffset? ParsePublishedAt(JsonElement node)
-    {
-        var text = ReadString(node, "publishedAt");
-        if (string.IsNullOrWhiteSpace(text))
-        {
-            return null;
-        }
-
-        return DateTimeOffset.TryParse(text, CultureInfo.InvariantCulture, DateTimeStyles.AssumeUniversal, out var value)
-            ? value
-            : null;
-    }
-
-    private static bool TryGetPropertyIgnoreCase(JsonElement node, string propertyName, out JsonElement value)
-    {
-        if (node.ValueKind == JsonValueKind.Object)
-        {
-            foreach (var property in node.EnumerateObject())
-            {
-                if (string.Equals(property.Name, propertyName, StringComparison.OrdinalIgnoreCase))
-                {
-                    value = property.Value;
-                    return true;
-                }
-            }
-        }
-
-        value = default;
-        return false;
-    }
-
-    private static bool TryParseVersion(string? value, out Version? version)
-    {
-        version = null;
-        if (string.IsNullOrWhiteSpace(value))
-        {
-            return false;
-        }
-
-        var normalized = value.Trim().TrimStart('v', 'V');
-        var separatorIndex = normalized.IndexOfAny(['-', '+', ' ']);
-        if (separatorIndex > 0)
-        {
-            normalized = normalized[..separatorIndex];
-        }
-
-        if (!Version.TryParse(normalized, out var parsed))
-        {
-            return false;
-        }
-
-        version = NormalizeVersion(parsed);
-        return true;
-    }
-
-    private static Version NormalizeVersion(Version version)
-    {
-        var major = Math.Max(0, version.Major);
-        var minor = Math.Max(0, version.Minor);
-        var build = Math.Max(0, version.Build >= 0 ? version.Build : 0);
-        var revision = Math.Max(0, version.Revision >= 0 ? version.Revision : 0);
-        return revision > 0
-            ? new Version(major, minor, build, revision)
-            : new Version(major, minor, build);
-    }
-
-    private static string FormatVersionText(Version version)
-    {
-        return version.Revision > 0
-            ? version.ToString(4)
-            : version.ToString(3);
-    }
-
-    private static string Truncate(string value, int maxLength)
-    {
-        if (string.IsNullOrEmpty(value) || value.Length <= maxLength)
-        {
-            return value;
-        }
-
-        return value[..maxLength];
-    }
-
-    private static bool IsTransientStatusCode(HttpStatusCode statusCode)
-    {
-        return statusCode == HttpStatusCode.RequestTimeout ||
-               statusCode == HttpStatusCode.TooManyRequests ||
-               statusCode >= HttpStatusCode.InternalServerError;
-    }
-
-    private static bool IsLikelyIncompleteJson(string? body)
-    {
-        if (string.IsNullOrWhiteSpace(body))
-        {
-            return true;
-        }
-
-        var trimmed = body.TrimEnd();
-        if (trimmed.Length == 0)
-        {
-            return true;
-        }
-
-        var last = trimmed[^1];
-        return last != '}' && last != ']';
-    }
-
-    private static TimeSpan GetRetryDelay(int attempt)
-    {
-        return attempt switch
-        {
-            1 => TimeSpan.FromMilliseconds(350),
-            2 => TimeSpan.FromMilliseconds(900),
-            _ => TimeSpan.FromMilliseconds(1500)
-        };
-    }
-
-    private static string GetStageName(PlondsCheckStage stage)
-    {
-        return stage switch
-        {
-            PlondsCheckStage.Metadata => "metadata",
-            PlondsCheckStage.Latest => "latest",
-            PlondsCheckStage.Distribution => "distribution",
-            PlondsCheckStage.PayloadParse => "payload-parse",
-            _ => "unknown"
-        };
-    }
-
-    private enum PlondsCheckStage
-    {
-        Metadata,
-        Latest,
-        Distribution,
-        PayloadParse
-    }
-
-    private sealed record LatestDescriptor(
-        string DistributionId,
-        string VersionText,
-        Version Version);
-
-    private sealed record DistributionDescriptor(
-        LatestDescriptor Latest,
-        JsonElement DistributionNode,
-        IReadOnlyList<GitHubReleaseAsset> Assets,
-        PlondsUpdatePayload Payload);
-
-    private sealed class PlondsRequestException : Exception
-    {
-        public PlondsRequestException(
-            PlondsCheckStage stage,
-            string message,
-            HttpStatusCode? statusCode = null,
-            bool isTransient = false,
-            Exception? innerException = null)
-            : base(message, innerException)
-        {
-            Stage = stage;
-            StatusCode = statusCode;
-            IsTransient = isTransient;
-        }
-
-        public PlondsCheckStage Stage { get; }
-
-        public HttpStatusCode? StatusCode { get; }
-
-        public bool IsTransient { get; }
     }
 }

LanMountainDesktop/Services/UpdateWorkflowService.cs

@@ -4,6 +4,7 @@ using System.ComponentModel;
 using System.Diagnostics;
 using System.Globalization;
 using System.IO;
+using System.IO.Compression;
 using System.Linq;
 using System.Net.Http;
 using System.Runtime.InteropServices;
@@ -64,6 +65,7 @@ public sealed class UpdateWorkflowService
     private const string PlondsFileMapName = "plonds-filemap.json";
     private const string PlondsFileMapSignatureName = "plonds-filemap.sig";
     private const string PlondsUpdateStateName = "plonds-update.json";
+    private const string PlondsUpdateArchiveName = "plonds-update.zip";
 
     private static readonly HttpClient PlondsHttpClient = new()
     {
@@ -302,47 +304,65 @@ public sealed class UpdateWorkflowService
                 "filemap-download",
                 cancellationToken);
 
-            IReadOnlyList<PlondsDownloadEntry> downloadEntries;
+            IReadOnlyList<PlondsDownloadedObjectInfo> objectResults;
-            try
+            if (!string.IsNullOrWhiteSpace(payload.UpdateArchiveUrl))
             {
-                downloadEntries = ParsePlondsDownloadEntries(fileMapJson);
+                progress?.Report(2d / 3d);
+                objectResults = await EnsurePlondsArchiveObjectsAsync(
+                    payload,
+                    incomingDir,
+                    objectsDir,
+                    state.UpdateDownloadSource,
+                    downloadThreads,
+                    progress,
+                    cancellationToken);
             }
-            catch (JsonException ex)
+            else
             {
-                throw new PlondsDownloadException("payload-parse", $"PLONDS file map JSON is invalid: {ex.Message}", ex);
+                IReadOnlyList<PlondsDownloadEntry> downloadEntries;
-            }
+                try
-
-            if (downloadEntries.Count == 0)
-            {
-                throw new PlondsDownloadException("payload-parse", "PLONDS file map does not contain downloadable objects.");
-            }
-
-            var expectedObjectCount = downloadEntries.Count;
-            var completedItems = 2;
-            progress?.Report(expectedObjectCount == 0 ? 1d : (double)completedItems / (expectedObjectCount + 2));
-
-            var objectResults = new List<PlondsDownloadedObjectInfo>(expectedObjectCount);
-            var objectTargets = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
-            var totalSteps = expectedObjectCount + 2;
-
-            foreach (var entry in downloadEntries)
-            {
-                if (!objectTargets.Add(entry.ObjectHashHex))
                 {
-                    completedItems++;
+                    downloadEntries = ParsePlondsDownloadEntries(fileMapJson);
-                    progress?.Report((double)completedItems / totalSteps);
+                }
-                    continue;
+                catch (JsonException ex)
+                {
+                    throw new PlondsDownloadException("payload-parse", $"PLONDS file map JSON is invalid: {ex.Message}", ex);
                 }
 
-                var objectInfo = await EnsurePlondsObjectAsync(
+                if (downloadEntries.Count == 0)
-                    entry,
+                {
-                    objectsDir,
+                    throw new PlondsDownloadException("payload-parse", "PLONDS file map does not contain downloadable objects.");
-                    downloadThreads,
+                }
-                    cancellationToken);
 
-                objectResults.Add(objectInfo);
+                var expectedObjectCount = downloadEntries.Count;
-                completedItems++;
+                var completedItems = 2;
-                progress?.Report((double)completedItems / totalSteps);
+                progress?.Report(expectedObjectCount == 0 ? 1d : (double)completedItems / (expectedObjectCount + 2));
+
+                var downloadResults = new List<PlondsDownloadedObjectInfo>(expectedObjectCount);
+                var objectTargets = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+                var totalSteps = expectedObjectCount + 2;
+
+                foreach (var entry in downloadEntries)
+                {
+                    if (!objectTargets.Add(entry.ObjectHashHex))
+                    {
+                        completedItems++;
+                        progress?.Report((double)completedItems / totalSteps);
+                        continue;
+                    }
+
+                    var objectInfo = await EnsurePlondsObjectAsync(
+                        entry,
+                        objectsDir,
+                        downloadThreads,
+                        cancellationToken);
+
+                    downloadResults.Add(objectInfo);
+                    completedItems++;
+                    progress?.Report((double)completedItems / totalSteps);
+                }
+
+                objectResults = downloadResults;
             }
 
             var updateState = new PlondsUpdateState(
@@ -692,6 +712,91 @@ public sealed class UpdateWorkflowService
             lastError);
     }
 
+    private async Task<IReadOnlyList<PlondsDownloadedObjectInfo>> EnsurePlondsArchiveObjectsAsync(
+        PlondsUpdatePayload payload,
+        string incomingDirectory,
+        string objectsDirectory,
+        string downloadSource,
+        int downloadThreads,
+        IProgress<double>? progress,
+        CancellationToken cancellationToken)
+    {
+        if (string.IsNullOrWhiteSpace(payload.UpdateArchiveUrl))
+        {
+            throw new PlondsDownloadException("payload-parse", "PLONDS payload does not contain an update archive URL.");
+        }
+
+        var archiveAsset = new GitHubReleaseAsset(
+            Name: Path.GetFileName(payload.UpdateArchiveUrl) ?? PlondsUpdateArchiveName,
+            BrowserDownloadUrl: payload.UpdateArchiveUrl,
+            SizeBytes: payload.UpdateArchiveSizeBytes ?? 0,
+            Sha256: payload.UpdateArchiveSha256);
+        var archivePath = Path.Combine(incomingDirectory, PlondsUpdateArchiveName);
+        var archiveProgress = progress is null
+            ? null
+            : new Progress<double>(p => progress.Report((2d + p) / 3d));
+
+        var downloadResult = await _settingsFacade.Update.DownloadAssetAsync(
+            archiveAsset,
+            archivePath,
+            downloadSource,
+            downloadThreads,
+            archiveProgress,
+            cancellationToken);
+
+        if (!downloadResult.Success)
+        {
+            downloadResult = await _settingsFacade.Update.RedownloadAssetAsync(
+                archiveAsset,
+                archivePath,
+                downloadSource,
+                downloadThreads,
+                archiveProgress,
+                cancellationToken);
+        }
+
+        if (!downloadResult.Success)
+        {
+            throw new PlondsDownloadException(
+                "object-download",
+                $"Failed to download PLONDS update archive: {downloadResult.ErrorMessage}");
+        }
+
+        try
+        {
+            if (Directory.Exists(objectsDirectory))
+            {
+                Directory.Delete(objectsDirectory, recursive: true);
+            }
+
+            Directory.CreateDirectory(objectsDirectory);
+            ZipFile.ExtractToDirectory(archivePath, objectsDirectory, overwriteFiles: true);
+        }
+        catch (Exception ex)
+        {
+            throw new PlondsDownloadException(
+                "payload-parse",
+                $"Failed to extract PLONDS update archive: {ex.Message}",
+                ex);
+        }
+        finally
+        {
+            DeleteFileIfExists(archivePath);
+        }
+
+        var objectResults = Directory.EnumerateFiles(objectsDirectory, "*", SearchOption.AllDirectories)
+            .Select(path => new PlondsDownloadedObjectInfo(
+                ComponentId: "app",
+                RelativePath: Path.GetRelativePath(objectsDirectory, path).Replace('\\', '/'),
+                SourceUrl: payload.UpdateArchiveUrl,
+                ObjectHashHex: Path.GetFileName(path),
+                LocalPath: path))
+            .ToArray();
+
+        progress?.Report(1d);
+        return objectResults;
+    }
+
     private static IReadOnlyList<PlondsDownloadEntry> ParsePlondsDownloadEntries(string fileMapJson)
     {
         var entries = new List<PlondsDownloadEntry>();

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

@@ -0,0 +1,9 @@
+namespace Plonds.Core.Publishing;
+
+public sealed record DdssBuildOptions(
+    string ReleaseTag,
+    string AssetsDirectory,
+    string OutputRoot,
+    string PrivateKeyPath,
+    string Repository,
+    string? S3BaseUrl = null);

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

@@ -0,0 +1,68 @@
+using Plonds.Core.Security;
+using Plonds.Shared.Models;
+
+namespace Plonds.Core.Publishing;
+
+public sealed class DdssManifestBuilder
+{
+    private readonly RsaFileSigner _signer = new();
+
+    public string Build(DdssBuildOptions options)
+    {
+        ArgumentNullException.ThrowIfNull(options);
+
+        var assetsDirectory = Path.GetFullPath(options.AssetsDirectory);
+        if (!Directory.Exists(assetsDirectory))
+        {
+            throw new DirectoryNotFoundException($"DDSS assets directory not found: {assetsDirectory}");
+        }
+
+        var assetEntries = Directory
+            .EnumerateFiles(assetsDirectory, "*", SearchOption.TopDirectoryOnly)
+            .Where(static path =>
+            {
+                var name = Path.GetFileName(path);
+                return !name.Equals("ddss.json", StringComparison.OrdinalIgnoreCase)
+                       && !name.Equals("ddss.json.sig", StringComparison.OrdinalIgnoreCase);
+            })
+            .OrderBy(static path => Path.GetFileName(path), StringComparer.OrdinalIgnoreCase)
+            .Select(path => BuildAssetEntry(path, options.Repository, options.ReleaseTag, options.S3BaseUrl))
+            .ToArray();
+
+        var manifest = new DdssManifest(
+            FormatVersion: "1.0",
+            ReleaseTag: options.ReleaseTag,
+            GeneratedAt: DateTimeOffset.UtcNow,
+            Assets: assetEntries);
+
+        var outputRoot = Path.GetFullPath(options.OutputRoot);
+        Directory.CreateDirectory(outputRoot);
+        var manifestPath = Path.Combine(outputRoot, "ddss.json");
+        PayloadUtilities.WriteJson(manifestPath, manifest);
+        _signer.SignFile(manifestPath, options.PrivateKeyPath, manifestPath + ".sig");
+        return manifestPath;
+    }
+
+    private static DdssAssetEntry BuildAssetEntry(string assetPath, string repository, string releaseTag, string? s3BaseUrl)
+    {
+        var fileName = Path.GetFileName(assetPath);
+        var mirrors = new List<DdssMirrorEntry>
+        {
+            new("github", $"https://github.com/{repository}/releases/download/{releaseTag}/{Uri.EscapeDataString(fileName)}")
+        };
+
+        if (!string.IsNullOrWhiteSpace(s3BaseUrl))
+        {
+            mirrors.Add(new DdssMirrorEntry(
+                "s3",
+                $"{s3BaseUrl.TrimEnd('/')}/{Uri.EscapeDataString(fileName)}"));
+        }
+
+        return new DdssAssetEntry(
+            AssetId: fileName,
+            FileName: fileName,
+            Sha256: PayloadUtilities.ComputeSha256(assetPath),
+            Size: new FileInfo(assetPath).Length,
+            Mirrors: mirrors);
+    }
+}

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

@@ -0,0 +1,235 @@
+using System.IO.Compression;
+using System.Security.Cryptography;
+using System.Text;
+using System.Text.Json;
+
+namespace Plonds.Core.Publishing;
+
+public static class PayloadUtilities
+{
+    public static readonly JsonSerializerOptions JsonOptions = new()
+    {
+        PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+        WriteIndented = true
+    };
+
+    public static void CreatePayloadZip(string sourceDirectory, string outputZipPath)
+    {
+        var resolvedSourceDirectory = Path.GetFullPath(sourceDirectory);
+        if (!Directory.Exists(resolvedSourceDirectory))
+        {
+            throw new DirectoryNotFoundException($"Payload source directory not found: {resolvedSourceDirectory}");
+        }
+
+        var resolvedOutputZipPath = Path.GetFullPath(outputZipPath);
+        var outputDirectory = Path.GetDirectoryName(resolvedOutputZipPath);
+        if (!string.IsNullOrWhiteSpace(outputDirectory))
+        {
+            Directory.CreateDirectory(outputDirectory);
+        }
+
+        if (File.Exists(resolvedOutputZipPath))
+        {
+            File.Delete(resolvedOutputZipPath);
+        }
+
+        using var archive = ZipFile.Open(resolvedOutputZipPath, ZipArchiveMode.Create);
+        foreach (var filePath in Directory.EnumerateFiles(resolvedSourceDirectory, "*", SearchOption.AllDirectories))
+        {
+            var relativePath = NormalizeRelativePath(Path.GetRelativePath(resolvedSourceDirectory, filePath));
+            if (ShouldIgnore(relativePath))
+            {
+                continue;
+            }
+
+            archive.CreateEntryFromFile(filePath, relativePath, CompressionLevel.Optimal);
+        }
+    }
+
+    internal static void ExtractZip(string zipPath, string destinationDirectory)
+    {
+        var resolvedZipPath = Path.GetFullPath(zipPath);
+        if (!File.Exists(resolvedZipPath))
+        {
+            throw new FileNotFoundException("Payload archive not found.", resolvedZipPath);
+        }
+
+        EnsureCleanDirectory(destinationDirectory);
+        ZipFile.ExtractToDirectory(resolvedZipPath, destinationDirectory, overwriteFiles: true);
+    }
+
+    internal static Dictionary<string, FileFingerprint> ScanDirectory(string? root)
+    {
+        var manifest = new Dictionary<string, FileFingerprint>(StringComparer.OrdinalIgnoreCase);
+        if (string.IsNullOrWhiteSpace(root) || !Directory.Exists(root))
+        {
+            return manifest;
+        }
+
+        var resolvedRoot = Path.GetFullPath(root);
+        foreach (var filePath in Directory.EnumerateFiles(resolvedRoot, "*", SearchOption.AllDirectories))
+        {
+            var relativePath = NormalizeRelativePath(Path.GetRelativePath(resolvedRoot, filePath));
+            if (ShouldIgnore(relativePath))
+            {
+                continue;
+            }
+
+            var fileInfo = new FileInfo(filePath);
+            manifest[relativePath] = new FileFingerprint(
+                relativePath,
+                filePath,
+                ComputeSha256(filePath),
+                fileInfo.Length,
+                ResolveUnixFileMode(filePath));
+        }
+
+        return manifest;
+    }
+
+    internal static string CopyObject(string sourcePath, string objectsRoot, string sha256)
+    {
+        var normalizedSha256 = sha256.Trim().ToLowerInvariant();
+        var prefix = normalizedSha256[..Math.Min(2, normalizedSha256.Length)];
+        var relativePath = NormalizeRelativePath(Path.Combine(prefix, normalizedSha256));
+        var destinationPath = Path.Combine(objectsRoot, prefix, normalizedSha256);
+        Directory.CreateDirectory(Path.GetDirectoryName(destinationPath)!);
+        if (!File.Exists(destinationPath))
+        {
+            File.Copy(sourcePath, destinationPath, overwrite: true);
+        }
+
+        return relativePath;
+    }
+
+    internal static void EnsureCleanDirectory(string path)
+    {
+        var resolvedPath = Path.GetFullPath(path);
+        if (Directory.Exists(resolvedPath))
+        {
+            Directory.Delete(resolvedPath, recursive: true);
+        }
+
+        Directory.CreateDirectory(resolvedPath);
+    }
+
+    internal static string ComputeSha256(string filePath)
+    {
+        using var stream = File.OpenRead(filePath);
+        return Convert.ToHexString(SHA256.HashData(stream)).ToLowerInvariant();
+    }
+
+    internal static void WriteJson<T>(string path, T value)
+    {
+        var directory = Path.GetDirectoryName(Path.GetFullPath(path));
+        if (!string.IsNullOrWhiteSpace(directory))
+        {
+            Directory.CreateDirectory(directory);
+        }
+
+        var json = JsonSerializer.Serialize(value, JsonOptions);
+        File.WriteAllText(path, json, new UTF8Encoding(false));
+    }
+
+    internal static string NormalizeRelativePath(string value)
+    {
+        return value.Replace('\\', '/').TrimStart('/');
+    }
+
+    internal static string ResolveArch(string platform)
+    {
+        if (platform.EndsWith("-x86", StringComparison.OrdinalIgnoreCase))
+        {
+            return "x86";
+        }
+
+        if (platform.EndsWith("-arm64", StringComparison.OrdinalIgnoreCase))
+        {
+            return "arm64";
+        }
+
+        return "x64";
+    }
+
+    internal static bool ShouldIgnore(string relativePath)
+    {
+        var normalized = NormalizeRelativePath(relativePath.Trim());
+        if (string.IsNullOrWhiteSpace(normalized))
+        {
+            return true;
+        }
+
+        return normalized.Equals(".current", StringComparison.OrdinalIgnoreCase)
+               || normalized.Equals(".partial", StringComparison.OrdinalIgnoreCase)
+               || normalized.Equals(".destroy", StringComparison.OrdinalIgnoreCase)
+               || normalized.StartsWith(".current/", StringComparison.OrdinalIgnoreCase)
+               || normalized.StartsWith(".partial/", StringComparison.OrdinalIgnoreCase)
+               || normalized.StartsWith(".destroy/", StringComparison.OrdinalIgnoreCase)
+               || normalized.StartsWith("logs/", StringComparison.OrdinalIgnoreCase)
+               || normalized.StartsWith("cache/", StringComparison.OrdinalIgnoreCase)
+               || normalized.StartsWith("snapshots/", StringComparison.OrdinalIgnoreCase)
+               || normalized.StartsWith("snapshot/", StringComparison.OrdinalIgnoreCase);
+    }
+
+    private static string? ResolveUnixFileMode(string path)
+    {
+        if (OperatingSystem.IsWindows())
+        {
+            return null;
+        }
+
+        try
+        {
+            var mode = File.GetUnixFileMode(path);
+            return Convert.ToString((int)mode, 8);
+        }
+        catch
+        {
+            return InferUnixFileMode(path);
+        }
+    }
+
+    private static string? InferUnixFileMode(string path)
+    {
+        if (!LooksExecutable(path))
+        {
+            return null;
+        }
+
+        return "755";
+    }
+
+    private static bool LooksExecutable(string path)
+    {
+        try
+        {
+            using var stream = File.OpenRead(path);
+            Span<byte> header = stackalloc byte[4];
+            var read = stream.Read(header);
+            if (read >= 4 &&
+                header[0] == 0x7F &&
+                header[1] == (byte)'E' &&
+                header[2] == (byte)'L' &&
+                header[3] == (byte)'F')
+            {
+                return true;
+            }
+
+            if (read >= 2 && header[0] == (byte)'#' && header[1] == (byte)'!')
+            {
+                return true;
+            }
+        }
+        catch
+        {
+            return false;
+        }
+
+        var extension = Path.GetExtension(path);
+        return string.IsNullOrWhiteSpace(extension) &&
+               !OperatingSystem.IsWindows() &&
+               Path.GetFileName(path).Contains("LanMountainDesktop", StringComparison.OrdinalIgnoreCase);
+    }
+
+    internal sealed record FileFingerprint(string RelativePath, string FullPath, string Sha256, long Size, string? UnixFileMode);
+}

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

@@ -0,0 +1,14 @@
+namespace Plonds.Core.Publishing;
+
+public sealed record PlondsDeltaBuildOptions(
+    string Platform,
+    string CurrentVersion,
+    string CurrentTag,
+    string CurrentPayloadZip,
+    string OutputRoot,
+    string PrivateKeyPath,
+    string Channel = "stable",
+    string? BaselineVersion = null,
+    string? BaselineTag = null,
+    string? BaselinePayloadZip = null,
+    bool IsFullPayload = false);

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

@@ -0,0 +1,13 @@
+namespace Plonds.Core.Publishing;
+
+public sealed record PlondsDeltaBuildResult(
+    string Platform,
+    string DistributionId,
+    string UpdateArchivePath,
+    string FileMapPath,
+    string FileMapSignaturePath,
+    string SummaryPath,
+    bool IsFullPayload,
+    string? BaselineTag,
+    string? BaselineVersion,
+    string TargetVersion);

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

@@ -0,0 +1,228 @@
+using Plonds.Core.Security;
+using Plonds.Shared.Models;
+
+namespace Plonds.Core.Publishing;
+
+public sealed class PlondsDeltaBuilder
+{
+    private readonly RsaFileSigner _signer = new();
+
+    public PlondsDeltaBuildResult Build(PlondsDeltaBuildOptions options)
+    {
+        ArgumentNullException.ThrowIfNull(options);
+
+        var currentPayloadZip = Path.GetFullPath(options.CurrentPayloadZip);
+        if (!File.Exists(currentPayloadZip))
+        {
+            throw new FileNotFoundException("Current payload zip not found.", currentPayloadZip);
+        }
+
+        var baselinePayloadZip = string.IsNullOrWhiteSpace(options.BaselinePayloadZip)
+            ? null
+            : Path.GetFullPath(options.BaselinePayloadZip);
+        if (!string.IsNullOrWhiteSpace(baselinePayloadZip) && !File.Exists(baselinePayloadZip))
+        {
+            throw new FileNotFoundException("Baseline payload zip not found.", baselinePayloadZip);
+        }
+
+        var outputRoot = Path.GetFullPath(options.OutputRoot);
+        var workRoot = Path.Combine(outputRoot, "work", options.Platform);
+        var currentExtractRoot = Path.Combine(workRoot, "current");
+        var baselineExtractRoot = Path.Combine(workRoot, "baseline");
+        var objectsRoot = Path.Combine(workRoot, "objects");
+        var releaseAssetsRoot = Path.Combine(outputRoot, "release-assets");
+        var summaryRoot = Path.Combine(outputRoot, "platform-summaries");
+
+        Directory.CreateDirectory(releaseAssetsRoot);
+        Directory.CreateDirectory(summaryRoot);
+        PayloadUtilities.ExtractZip(currentPayloadZip, currentExtractRoot);
+
+        var useFullPayload = options.IsFullPayload || string.IsNullOrWhiteSpace(baselinePayloadZip);
+        if (useFullPayload)
+        {
+            PayloadUtilities.EnsureCleanDirectory(baselineExtractRoot);
+        }
+        else
+        {
+            PayloadUtilities.ExtractZip(baselinePayloadZip!, baselineExtractRoot);
+        }
+
+        PayloadUtilities.EnsureCleanDirectory(objectsRoot);
+
+        var previousManifest = useFullPayload
+            ? new Dictionary<string, PayloadUtilities.FileFingerprint>(StringComparer.OrdinalIgnoreCase)
+            : PayloadUtilities.ScanDirectory(baselineExtractRoot);
+        var currentManifest = PayloadUtilities.ScanDirectory(currentExtractRoot);
+        var fileEntries = BuildFileEntries(previousManifest, currentManifest, objectsRoot);
+
+        var updateAssetName = $"update-{options.Platform}.zip";
+        var fileMapAssetName = $"plonds-filemap-{options.Platform}.json";
+        var fileMapSignatureAssetName = fileMapAssetName + ".sig";
+        var distributionId = $"plonds-{options.CurrentVersion}-{options.Platform}";
+        var updateArchivePath = Path.Combine(releaseAssetsRoot, updateAssetName);
+        var fileMapPath = Path.Combine(releaseAssetsRoot, fileMapAssetName);
+        var fileMapSignaturePath = Path.Combine(releaseAssetsRoot, fileMapSignatureAssetName);
+
+        PayloadUtilities.CreatePayloadZip(objectsRoot, updateArchivePath);
+
+        var metadata = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase)
+        {
+            ["protocol"] = "PLONDS",
+            ["channel"] = options.Channel,
+            ["releaseTag"] = options.CurrentTag,
+            ["baselineTag"] = options.BaselineTag ?? string.Empty,
+            ["baselineVersion"] = options.BaselineVersion ?? "0.0.0",
+            ["targetVersion"] = options.CurrentVersion,
+            ["isFullPayload"] = useFullPayload ? "true" : "false"
+        };
+
+        var component = new ComponentDocument(
+            Name: "app",
+            Version: options.CurrentVersion,
+            Metadata: new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase)
+            {
+                ["component"] = "app",
+                ["mode"] = "file-object"
+            },
+            Files: fileEntries);
+
+        var fileMap = new FileMapDocument(
+            FormatVersion: "1.0",
+            DistributionId: distributionId,
+            FromVersion: options.BaselineVersion ?? "0.0.0",
+            ToVersion: options.CurrentVersion,
+            Version: options.CurrentVersion,
+            Platform: options.Platform,
+            Arch: PayloadUtilities.ResolveArch(options.Platform),
+            Channel: options.Channel,
+            GeneratedAt: DateTimeOffset.UtcNow,
+            Metadata: metadata,
+            Components: [component],
+            Files: fileEntries);
+
+        PayloadUtilities.WriteJson(fileMapPath, fileMap);
+        _signer.SignFile(fileMapPath, options.PrivateKeyPath, fileMapSignaturePath);
+
+        var summary = new PlondsReleasePlatformEntry(
+            Platform: options.Platform,
+            DistributionId: distributionId,
+            BaselineTag: options.BaselineTag,
+            BaselineVersion: options.BaselineVersion ?? "0.0.0",
+            TargetVersion: options.CurrentVersion,
+            IsFullPayload: useFullPayload,
+            FilesZipAsset: $"files-{options.Platform}.zip",
+            UpdateZipAsset: updateAssetName,
+            FileMapAsset: fileMapAssetName,
+            FileMapSignatureAsset: fileMapSignatureAssetName,
+            Sha256: PayloadUtilities.ComputeSha256(updateArchivePath));
+
+        var summaryPath = Path.Combine(summaryRoot, $"platform-summary-{options.Platform}.json");
+        PayloadUtilities.WriteJson(summaryPath, summary);
+
+        return new PlondsDeltaBuildResult(
+            options.Platform,
+            distributionId,
+            updateArchivePath,
+            fileMapPath,
+            fileMapSignaturePath,
+            summaryPath,
+            useFullPayload,
+            options.BaselineTag,
+            options.BaselineVersion,
+            options.CurrentVersion);
+    }
+
+    private static List<FileEntryDocument> BuildFileEntries(
+        IReadOnlyDictionary<string, PayloadUtilities.FileFingerprint> previousManifest,
+        IReadOnlyDictionary<string, PayloadUtilities.FileFingerprint> currentManifest,
+        string objectsRoot)
+    {
+        var result = new List<FileEntryDocument>();
+
+        foreach (var path in currentManifest.Keys.OrderBy(static x => x, StringComparer.OrdinalIgnoreCase))
+        {
+            var current = currentManifest[path];
+            if (previousManifest.TryGetValue(path, out var previous) &&
+                string.Equals(current.Sha256, previous.Sha256, StringComparison.OrdinalIgnoreCase))
+            {
+                result.Add(new FileEntryDocument(
+                    Path: path,
+                    Action: "reuse",
+                    Sha256: current.Sha256,
+                    Size: current.Size,
+                    ObjectPath: null,
+                    ObjectKey: null,
+                    Metadata: null));
+                continue;
+            }
+
+            var action = previousManifest.ContainsKey(path) ? "replace" : "add";
+            var objectPath = PayloadUtilities.CopyObject(current.FullPath, objectsRoot, current.Sha256);
+            var metadata = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase)
+            {
+                ["mode"] = "file-object"
+            };
+            if (!string.IsNullOrWhiteSpace(current.UnixFileMode))
+            {
+                metadata["unixFileMode"] = current.UnixFileMode!;
+            }
+
+            result.Add(new FileEntryDocument(
+                Path: path,
+                Action: action,
+                Sha256: current.Sha256,
+                Size: current.Size,
+                ObjectPath: objectPath,
+                ObjectKey: objectPath,
+                Metadata: metadata));
+        }
+
+        foreach (var path in previousManifest.Keys.OrderBy(static x => x, StringComparer.OrdinalIgnoreCase))
+        {
+            if (currentManifest.ContainsKey(path))
+            {
+                continue;
+            }
+
+            result.Add(new FileEntryDocument(
+                Path: path,
+                Action: "delete",
+                Sha256: string.Empty,
+                Size: 0,
+                ObjectPath: null,
+                ObjectKey: null,
+                Metadata: null));
+        }
+
+        return result;
+    }
+
+    private sealed record FileMapDocument(
+        string FormatVersion,
+        string DistributionId,
+        string FromVersion,
+        string ToVersion,
+        string Version,
+        string Platform,
+        string Arch,
+        string Channel,
+        DateTimeOffset GeneratedAt,
+        IReadOnlyDictionary<string, string> Metadata,
+        IReadOnlyList<ComponentDocument> Components,
+        IReadOnlyList<FileEntryDocument> Files);
+
+    private sealed record ComponentDocument(
+        string Name,
+        string Version,
+        IReadOnlyDictionary<string, string>? Metadata,
+        IReadOnlyList<FileEntryDocument> Files);
+
+    private sealed record FileEntryDocument(
+        string Path,
+        string Action,
+        string Sha256,
+        long Size,
+        string? ObjectPath,
+        string? ObjectKey,
+        IReadOnlyDictionary<string, string>? Metadata);
+}

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

@@ -0,0 +1,57 @@
+using System.Text.Json;
+using Plonds.Core.Security;
+using Plonds.Shared.Models;
+
+namespace Plonds.Core.Publishing;
+
+public sealed class PlondsReleaseIndexBuilder
+{
+    private readonly RsaFileSigner _signer = new();
+
+    public string Build(PlondsReleaseIndexOptions options)
+    {
+        ArgumentNullException.ThrowIfNull(options);
+
+        var summariesDirectory = Path.GetFullPath(options.PlatformSummariesDirectory);
+        if (!Directory.Exists(summariesDirectory))
+        {
+            throw new DirectoryNotFoundException($"Platform summary directory not found: {summariesDirectory}");
+        }
+
+        var summaries = Directory
+            .EnumerateFiles(summariesDirectory, "platform-summary-*.json", SearchOption.TopDirectoryOnly)
+            .OrderBy(static path => path, StringComparer.OrdinalIgnoreCase)
+            .Select(ReadSummary)
+            .OrderBy(static entry => entry.Platform, StringComparer.OrdinalIgnoreCase)
+            .ToArray();
+
+        var manifest = new PlondsReleaseManifest(
+            FormatVersion: "1.0",
+            ReleaseTag: options.ReleaseTag,
+            Version: options.Version,
+            Channel: options.Channel,
+            GeneratedAt: DateTimeOffset.UtcNow,
+            Platforms: summaries);
+
+        var outputRoot = Path.GetFullPath(options.OutputRoot);
+        var releaseAssetsRoot = Path.Combine(outputRoot, "release-assets");
+        Directory.CreateDirectory(releaseAssetsRoot);
+
+        var manifestPath = Path.Combine(releaseAssetsRoot, "plonds.json");
+        PayloadUtilities.WriteJson(manifestPath, manifest);
+        _signer.SignFile(manifestPath, options.PrivateKeyPath, manifestPath + ".sig");
+        return manifestPath;
+    }
+
+    private static PlondsReleasePlatformEntry ReadSummary(string path)
+    {
+        var json = File.ReadAllText(path);
+        var summary = JsonSerializer.Deserialize<PlondsReleasePlatformEntry>(json, PayloadUtilities.JsonOptions);
+        if (summary is null)
+        {
+            throw new InvalidOperationException($"Unable to deserialize PLONDS platform summary: {path}");
+        }
+
+        return summary;
+    }
+}

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

@@ -0,0 +1,9 @@
+namespace Plonds.Core.Publishing;
+
+public sealed record PlondsReleaseIndexOptions(
+    string ReleaseTag,
+    string Version,
+    string Channel,
+    string PlatformSummariesDirectory,
+    string OutputRoot,
+    string PrivateKeyPath);

PenguinLogisticsOnlineNetworkDistributionSystem/src/Plonds.Shared/Models/DdssAssetEntry.cs

@@ -0,0 +1,8 @@
+namespace Plonds.Shared.Models;
+
+public sealed record DdssAssetEntry(
+    string AssetId,
+    string FileName,
+    string Sha256,
+    long Size,
+    IReadOnlyList<DdssMirrorEntry> Mirrors);

PenguinLogisticsOnlineNetworkDistributionSystem/src/Plonds.Shared/Models/DdssManifest.cs

@@ -0,0 +1,7 @@
+namespace Plonds.Shared.Models;
+
+public sealed record DdssManifest(
+    string FormatVersion,
+    string ReleaseTag,
+    DateTimeOffset GeneratedAt,
+    IReadOnlyList<DdssAssetEntry> Assets);

PenguinLogisticsOnlineNetworkDistributionSystem/src/Plonds.Shared/Models/DdssMirrorEntry.cs

@@ -0,0 +1,5 @@
+namespace Plonds.Shared.Models;
+
+public sealed record DdssMirrorEntry(
+    string Type,
+    string Url);

PenguinLogisticsOnlineNetworkDistributionSystem/src/Plonds.Shared/Models/PlondsReleaseManifest.cs

@@ -0,0 +1,9 @@
+namespace Plonds.Shared.Models;
+
+public sealed record PlondsReleaseManifest(
+    string FormatVersion,
+    string ReleaseTag,
+    string Version,
+    string Channel,
+    DateTimeOffset GeneratedAt,
+    IReadOnlyList<PlondsReleasePlatformEntry> Platforms);

PenguinLogisticsOnlineNetworkDistributionSystem/src/Plonds.Shared/Models/PlondsReleasePlatformEntry.cs

@@ -0,0 +1,14 @@
+namespace Plonds.Shared.Models;
+
+public sealed record PlondsReleasePlatformEntry(
+    string Platform,
+    string DistributionId,
+    string? BaselineTag,
+    string? BaselineVersion,
+    string TargetVersion,
+    bool IsFullPayload,
+    string FilesZipAsset,
+    string UpdateZipAsset,
+    string FileMapAsset,
+    string FileMapSignatureAsset,
+    string Sha256);

PenguinLogisticsOnlineNetworkDistributionSystem/src/Plonds.Tool/Program.cs

@@ -1,4 +1,4 @@
-using Plonds.Core.Publishing;
+using Plonds.Core.Publishing;
 using Plonds.Core.Security;
 
 return await PlondsCli.RunAsync(args);
@@ -29,6 +29,18 @@ internal static class PlondsCli
                 case "publish":
                     RunPublish(options);
                     return Task.FromResult(0);
+                case "pack-payload":
+                    RunPackPayload(options);
+                    return Task.FromResult(0);
+                case "build-delta":
+                    RunBuildDelta(options);
+                    return Task.FromResult(0);
+                case "build-index":
+                    RunBuildIndex(options);
+                    return Task.FromResult(0);
+                case "build-ddss":
+                    RunBuildDdss(options);
+                    return Task.FromResult(0);
                 default:
                     Console.Error.WriteLine($"Unknown command: {command}");
                     PrintUsage();
@@ -101,6 +113,62 @@ internal static class PlondsCli
         }
     }
 
+    private static void RunPackPayload(Dictionary<string, string> options)
+    {
+        var sourceDirectory = Require(options, "source-dir");
+        var outputZip = Require(options, "output-zip");
+        PayloadUtilities.CreatePayloadZip(sourceDirectory, outputZip);
+        Console.WriteLine(outputZip);
+    }
+
+    private static void RunBuildDelta(Dictionary<string, string> options)
+    {
+        var builder = new PlondsDeltaBuilder();
+        var result = builder.Build(new PlondsDeltaBuildOptions(
+            Platform: Require(options, "platform"),
+            CurrentVersion: Require(options, "current-version"),
+            CurrentTag: Require(options, "current-tag"),
+            CurrentPayloadZip: Require(options, "current-zip"),
+            OutputRoot: Require(options, "output-dir"),
+            PrivateKeyPath: Require(options, "private-key"),
+            Channel: Get(options, "channel", "stable") ?? "stable",
+            BaselineVersion: Get(options, "baseline-version"),
+            BaselineTag: Get(options, "baseline-tag"),
+            BaselinePayloadZip: Get(options, "baseline-zip"),
+            IsFullPayload: bool.TryParse(Get(options, "is-full-payload", "false"), out var isFullPayload) && isFullPayload));
+
+        Console.WriteLine($"Built PLONDS delta for {result.Platform}: {result.UpdateArchivePath}");
+        Console.WriteLine(result.FileMapPath);
+    }
+
+    private static void RunBuildIndex(Dictionary<string, string> options)
+    {
+        var builder = new PlondsReleaseIndexBuilder();
+        var manifestPath = builder.Build(new PlondsReleaseIndexOptions(
+            ReleaseTag: Require(options, "release-tag"),
+            Version: Require(options, "version"),
+            Channel: Get(options, "channel", "stable") ?? "stable",
+            PlatformSummariesDirectory: Require(options, "platform-summaries-dir"),
+            OutputRoot: Require(options, "output-dir"),
+            PrivateKeyPath: Require(options, "private-key")));
+
+        Console.WriteLine(manifestPath);
+    }
+
+    private static void RunBuildDdss(Dictionary<string, string> options)
+    {
+        var builder = new DdssManifestBuilder();
+        var manifestPath = builder.Build(new DdssBuildOptions(
+            ReleaseTag: Require(options, "release-tag"),
+            AssetsDirectory: Require(options, "assets-dir"),
+            OutputRoot: Require(options, "output-dir"),
+            PrivateKeyPath: Require(options, "private-key"),
+            Repository: Require(options, "repository"),
+            S3BaseUrl: Get(options, "s3-base-url")));
+
+        Console.WriteLine(manifestPath);
+    }
+
     private static Dictionary<string, string> ParseOptions(string[] args)
     {
         var result = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
@@ -142,8 +210,12 @@ internal static class PlondsCli
     private static void PrintUsage()
     {
         Console.WriteLine("PLONDS Tool");
-        Console.WriteLine("  generate --current-version <v> --current-dir <dir> --platform <platform> --output-dir <dir> [--previous-version <v>] [--previous-dir <dir>]");
+        Console.WriteLine("  pack-payload --source-dir <dir> --output-zip <file>");
+        Console.WriteLine("  build-delta --platform <platform> --current-version <v> --current-tag <tag> --current-zip <file> --output-dir <dir> --private-key <pem> [--baseline-tag <tag>] [--baseline-version <v>] [--baseline-zip <file>] [--is-full-payload]");
+        Console.WriteLine("  build-index --release-tag <tag> --version <v> --platform-summaries-dir <dir> --output-dir <dir> --private-key <pem> [--channel <channel>]");
+        Console.WriteLine("  build-ddss --release-tag <tag> --assets-dir <dir> --output-dir <dir> --private-key <pem> --repository <owner/repo> [--s3-base-url <url>]");
         Console.WriteLine("  sign --manifest <file> --private-key <pem> [--output <file>]");
+        Console.WriteLine("  generate --current-version <v> --current-dir <dir> --platform <platform> --output-dir <dir> [--previous-version <v>] [--previous-dir <dir>]");
         Console.WriteLine("  publish --version <v> --app-artifacts-root <dir> --installer-artifacts-root <dir> --output-dir <dir> --private-key <pem> [--baseline-root <dir>]");
     }
 }