fix(release): repair Apple and Android builds

Merge pull request #38 from sudosylabs/feat/release-0.2.1
chore(release): prepare 0.2.1
2026-08-05 10:29:58 +02:00 · 2026-07-30 20:26:27 +02:00 · 2026-07-30 19:43:19 +02:00 · 2026-07-30 19:27:57 +02:00 · 2026-07-30 19:25:15 +02:00 · 2026-07-30 19:12:50 +02:00
50 changed files with 2734 additions and 394 deletions
--- a/.github/workflows/android-release.yml
+++ b/.github/workflows/android-release.yml
@@ -0,0 +1,141 @@
+name: Android release package
+
+on:
+  workflow_call:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: android-release-${{ github.ref }}
+  cancel-in-progress: false
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  build:
+    name: Build signed Android APK and AAB
+    runs-on: ubuntu-24.04
+    timeout-minutes: 90
+    env:
+      CARGO_TERM_COLOR: always
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+        with:
+          persist-credentials: false
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5.2.0
+        with:
+          distribution: temurin
+          java-version: "21.0.11+10.0.LTS"
+
+      - name: Set up Gradle
+        uses: gradle/actions/setup-gradle@3f131e8634966bd73d06cc69884922b02e6faf92 # v6.2.0
+        with:
+          gradle-home-cache-strict-match: true
+
+      - name: Install Rust 1.91
+        uses: dtolnay/rust-toolchain@29eef336d9b2848a0b548edc03f92a220660cdb8 # v1
+        with:
+          toolchain: "1.91.0"
+          targets: aarch64-linux-android,x86_64-linux-android
+
+      - name: Cache Cargo
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: android-release-cargo-1.91.0-${{ hashFiles('Cargo.lock') }}
+          restore-keys: |
+            android-release-cargo-1.91.0-
+
+      - name: Set up Android SDK
+        uses: android-actions/setup-android@9fc6c4e9069bf8d3d10b2204b1fb8f6ef7065407 # v3
+        with:
+          packages: "platform-tools platforms;android-36 build-tools;36.0.0"
+
+      - name: Set up Android NDK
+        id: setup-ndk
+        uses: nttld/setup-ndk@ed92fe6cadad69be94a966a7ee3271275e62f779 # v1
+        with:
+          ndk-version: r27c
+          link-to-sdk: true
+          add-to-path: false
+
+      - name: Export Android NDK location
+        run: |
+          echo "ANDROID_NDK_HOME=${{ steps.setup-ndk.outputs.ndk-path }}" >> "$GITHUB_ENV"
+          echo "ANDROID_NDK_ROOT=${{ steps.setup-ndk.outputs.ndk-path }}" >> "$GITHUB_ENV"
+
+      - name: Resolve canonical version
+        id: version
+        run: |
+          packaging/version/resolve-version.sh verify >/dev/null
+          echo "app=$(packaging/version/resolve-version.sh product)" >> "$GITHUB_OUTPUT"
+          echo "code=$(packaging/version/resolve-version.sh android-code)" >> "$GITHUB_OUTPUT"
+
+      - name: Validate signing configuration
+        env:
+          KEYSTORE_BASE64: ${{ secrets.ANDROID_UPLOAD_KEYSTORE_BASE64 }}
+          KEYSTORE_PASSWORD: ${{ secrets.ANDROID_UPLOAD_KEYSTORE_PASSWORD }}
+          KEY_ALIAS: ${{ secrets.ANDROID_UPLOAD_KEY_ALIAS }}
+          KEY_PASSWORD: ${{ secrets.ANDROID_UPLOAD_KEY_PASSWORD }}
+          UPLOAD_CERT_SHA256: ${{ vars.ANDROID_UPLOAD_CERT_SHA256 }}
+        run: |
+          for name in \
+            KEYSTORE_BASE64 \
+            KEYSTORE_PASSWORD \
+            KEY_ALIAS \
+            KEY_PASSWORD \
+            UPLOAD_CERT_SHA256; do
+            if [ -z "${!name:-}" ]; then
+              echo "Missing Android release signing configuration: $name" >&2
+              exit 1
+            fi
+          done
+
+      - name: Decode upload keystore
+        env:
+          KEYSTORE_BASE64: ${{ secrets.ANDROID_UPLOAD_KEYSTORE_BASE64 }}
+        run: |
+          keystore="$RUNNER_TEMP/vnidrop-upload.jks"
+          printf '%s' "$KEYSTORE_BASE64" | base64 --decode > "$keystore"
+          chmod 600 "$keystore"
+          test -s "$keystore"
+          echo "VNIDROP_ANDROID_KEYSTORE_PATH=$keystore" >> "$GITHUB_ENV"
+
+      - name: Build and verify signed release
+        env:
+          VNIDROP_ANDROID_KEYSTORE_PASSWORD: ${{ secrets.ANDROID_UPLOAD_KEYSTORE_PASSWORD }}
+          VNIDROP_ANDROID_KEY_ALIAS: ${{ secrets.ANDROID_UPLOAD_KEY_ALIAS }}
+          VNIDROP_ANDROID_KEY_PASSWORD: ${{ secrets.ANDROID_UPLOAD_KEY_PASSWORD }}
+          VNIDROP_ANDROID_UPLOAD_CERT_SHA256: ${{ vars.ANDROID_UPLOAD_CERT_SHA256 }}
+        run: packaging/android/build-release.sh
+
+      - name: Remove upload keystore
+        if: always()
+        run: rm -f "$RUNNER_TEMP/vnidrop-upload.jks"
+
+      - name: Upload Android artifacts
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: vnidrop-${{ steps.version.outputs.app }}-android-release
+          path: build/release/android/
+          if-no-files-found: error
+          retention-days: 90
+          compression-level: 0
+
+      - name: Summarize Android package
+        run: |
+          echo "### Android release package" >> "$GITHUB_STEP_SUMMARY"
+          echo "- Version: ${{ steps.version.outputs.app }}" >> "$GITHUB_STEP_SUMMARY"
+          echo "- Version code: ${{ steps.version.outputs.code }}" >> "$GITHUB_STEP_SUMMARY"
+          echo "- Signing: upload certificate verified" >> "$GITHUB_STEP_SUMMARY"
--- a/.github/workflows/apple-release.yml
+++ b/.github/workflows/apple-release.yml
@@ -1,27 +1,20 @@
 name: Apple release (macOS DMG)

-# Builds, signs, notarizes, and publishes the direct-download macOS build:
+# Builds, signs, notarizes, and uploads the direct-download macOS build:
 #   - a Developer ID–signed, notarized VniDrop-<version>.dmg,
-#   - a Sparkle appcast.xml (both attached to the GitHub Release), and
-#   - an updated Homebrew cask pushed to the sudosylabs/homebrew-vnidrop tap.
+#   - a Sparkle appcast.xml.
+#
+# The central release workflow publishes these artifacts and updates Homebrew.
 #
 # The App Store / TestFlight build is NOT produced here — that goes through Xcode
 # Organizer / App Store Connect. This workflow only covers direct distribution.
 #
-# Trigger: push a tag vMAJOR.MINOR.PATCH (must point at a commit on master), or
-# run manually with an explicit version (produces artifacts, no Release).
+# Called by the central tag-release workflow, or run manually to validate the
+# signed/notarized direct-download artifact.

 on:
-  push:
-    tags:
-      - "v*.*.*"
+  workflow_call:
  workflow_dispatch:
-    inputs:
-      version:
-        description: Release version in MAJOR.MINOR.PATCH form
-        required: true
-        default: "0.1.0"
-        type: string

 permissions:
  contents: read
@@ -39,8 +32,6 @@ jobs:
    name: Build & notarize DMG
    runs-on: macos-latest
    timeout-minutes: 90
-    permissions:
-      contents: write
    outputs:
      version: ${{ steps.version.outputs.app }}
    steps:
@@ -58,17 +49,11 @@ jobs:
            exit 1
          fi

-      - name: Resolve version
+      - name: Resolve canonical version
        id: version
-        env:
-          REQUESTED_VERSION: ${{ inputs.version || '' }}
        run: |
-          if [ "${GITHUB_REF_TYPE:-}" = "tag" ]; then
-            version="${GITHUB_REF_NAME#v}"
-          else
-            version="$REQUESTED_VERSION"
-          fi
-          [[ "$version" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]] || { echo "bad version '$version'" >&2; exit 1; }
+          packaging/version/resolve-version.sh verify >/dev/null
+          version="$(packaging/version/resolve-version.sh product)"
          echo "app=$version" >> "$GITHUB_OUTPUT"

      - name: Select Xcode
@@ -94,7 +79,7 @@ jobs:
        run: brew install xcodegen swiftlint create-dmg

      - name: Install Bun
-        uses: oven-sh/setup-bun@v2
+        uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2

      - name: Download Sparkle tools
        # generate_appcast + sign_update ship in the Sparkle release tarball.
@@ -147,12 +132,12 @@ jobs:
          echo "SPARKLE_ED_KEY_FILE=$RUNNER_TEMP/sparkle_ed_private_key" >> "$GITHUB_ENV"

      - name: Build, sign & notarize DMG
-        run: apple/scripts/build-dmg.sh "${{ steps.version.outputs.app }}"
+        run: make build-apple-dmg

      - name: Generate appcast
        env:
          RELEASE_REPO: ${{ github.repository }}
-        run: apple/scripts/generate-appcast.sh "${{ steps.version.outputs.app }}"
+        run: apple/scripts/generate-appcast.sh

      - name: Upload artifacts
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
@@ -160,71 +145,7 @@ jobs:
          name: vnidrop-${{ steps.version.outputs.app }}-macos-dmg
          path: |
            apple/dist/VniDrop-*.dmg
+            apple/dist/VniDrop-*.build-info.json
            apple/dist/appcast.xml
          if-no-files-found: error
          retention-days: 14
-
-      - name: Publish GitHub Release
-        if: github.event_name == 'push' && github.ref_type == 'tag'
-        env:
-          GH_TOKEN: ${{ github.token }}
-          GH_REPO: ${{ github.repository }}
-        run: |
-          set -euo pipefail
-          tag="$GITHUB_REF_NAME"
-          version="${tag#v}"
-          if gh release view "$tag" >/dev/null 2>&1; then
-            echo "Release $tag already exists; refusing to replace assets" >&2
-            exit 1
-          fi
-          gh release create "$tag" \
-            "apple/dist/VniDrop-${version}.dmg" \
-            "apple/dist/appcast.xml" \
-            --verify-tag \
-            --title "VniDrop $version" \
-            --generate-notes
-
-  update-cask:
-    name: Update Homebrew cask
-    needs: build
-    if: github.event_name == 'push' && github.ref_type == 'tag'
-    runs-on: ubuntu-22.04
-    timeout-minutes: 15
-    steps:
-      - name: Checkout
-        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
-        with:
-          persist-credentials: false
-
-      - name: Download DMG artifact
-        uses: actions/download-artifact@70fc10c6e5e1ce46ad2ea6f2b72d43f7d47b13c3 # v8.0.0
-        with:
-          name: vnidrop-${{ needs.build.outputs.version }}-macos-dmg
-          path: dist
-
-      - name: Render cask
-        env:
-          VERSION: ${{ needs.build.outputs.version }}
-        run: |
-          set -euo pipefail
-          sha="$(sha256sum "dist/VniDrop-${VERSION}.dmg" | cut -d' ' -f1)"
-          sed -e "s/^  version \".*\"/  version \"${VERSION}\"/" \
-              -e "s/^  sha256 \".*\"/  sha256 \"${sha}\"/" \
-              packaging/homebrew/vnidrop.rb > /tmp/vnidrop.rb
-          echo "Rendered cask:"; cat /tmp/vnidrop.rb
-
-      - name: Push to tap
-        env:
-          TAP_TOKEN: ${{ secrets.HOMEBREW_TAP_TOKEN }}
-          VERSION: ${{ needs.build.outputs.version }}
-        run: |
-          set -euo pipefail
-          git clone "https://x-access-token:${TAP_TOKEN}@github.com/sudosylabs/homebrew-vnidrop.git" tap
-          mkdir -p tap/Casks
-          cp /tmp/vnidrop.rb tap/Casks/vnidrop.rb
-          cd tap
-          git config user.name "vnidrop-release-bot"
-          git config user.email "release-bot@users.noreply.github.com"
-          git add Casks/vnidrop.rb
-          git commit -m "vnidrop ${VERSION}" || { echo "no cask changes"; exit 0; }
-          git push
--- a/.github/workflows/apple.yml
+++ b/.github/workflows/apple.yml
@@ -4,6 +4,8 @@ on:
  pull_request:
    paths:
      - "apple/**"
+      - "version.properties"
+      - "packaging/version/**"
      - "crates/vnidrop/**"
      - "crates/uniffi-bindgen/**"
      - "Cargo.toml"
@@ -18,6 +20,8 @@ on:
      - master
    paths:
      - "apple/**"
+      - "version.properties"
+      - "packaging/version/**"
      - "crates/vnidrop/**"
      - "crates/uniffi-bindgen/**"
      - "Cargo.toml"
--- a/.github/workflows/linux-packages.yml
+++ b/.github/workflows/linux-packages.yml
@@ -5,6 +5,8 @@ on:
    paths:
      - ".github/workflows/linux-packages.yml"
      - "packaging/linux/**"
+      - "packaging/version/**"
+      - "version.properties"
      - "assets/linux/**"
      - "desktopApp/**"
      - "shared/**"
@@ -20,16 +22,8 @@ on:
      - "Makefile"
      - "config.mk"
      - "make/**"
-  push:
-    tags:
-      - "v*.*.*"
+  workflow_call:
  workflow_dispatch:
-    inputs:
-      version:
-        description: Release version in MAJOR.MINOR.PATCH form
-        required: true
-        default: "1.0.0"
-        type: string

 permissions:
  contents: read
@@ -88,16 +82,14 @@ jobs:
          restore-keys: |
            linux-deb-x64-cargo-1.91.0-

-      - name: Resolve version
+      - name: Resolve canonical version
        id: version
-        env:
-          REQUESTED_VERSION: ${{ inputs.version || '1.0.0' }}
        run: |
-          version=$(packaging/linux/resolve-version.sh "$REQUESTED_VERSION")
+          version=$(packaging/linux/resolve-version.sh)
          echo "app=$version" >> "$GITHUB_OUTPUT"

      - name: Test and build Debian package
-        run: make package-deb VERSION=${{ steps.version.outputs.app }}
+        run: make package-deb

      - name: Upload Debian artifact
        if: github.event_name != 'pull_request'
@@ -193,16 +185,14 @@ jobs:
          restore-keys: |
            linux-rpm-x64-cargo-1.91.0-

-      - name: Resolve version
+      - name: Resolve canonical version
        id: version
-        env:
-          REQUESTED_VERSION: ${{ inputs.version || '1.0.0' }}
        run: |
-          version=$(packaging/linux/resolve-version.sh "$REQUESTED_VERSION")
+          version=$(packaging/linux/resolve-version.sh)
          echo "app=$version" >> "$GITHUB_OUTPUT"

      - name: Build RPM package
-        run: make package-rpm VERSION=${{ steps.version.outputs.app }}
+        run: make package-rpm

      - name: Upload RPM artifact
        if: github.event_name != 'pull_request'
@@ -220,74 +210,3 @@ jobs:
          echo "- Version: ${{ steps.version.outputs.app }}-1" >> "$GITHUB_STEP_SUMMARY"
          echo "- Architecture: x86_64" >> "$GITHUB_STEP_SUMMARY"
          echo "- Build environment: Fedora 43" >> "$GITHUB_STEP_SUMMARY"
-
-  publish-release:
-    name: Publish GitHub Release assets
-    if: github.event_name == 'push' && github.ref_type == 'tag'
-    needs:
-      - build-deb
-      - build-rpm
-    runs-on: ubuntu-22.04
-    timeout-minutes: 15
-    permissions:
-      contents: write
-
-    steps:
-      - name: Checkout release history
-        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
-        with:
-          fetch-depth: 0
-          persist-credentials: false
-
-      - name: Verify tag is on master
-        run: |
-          if ! git merge-base --is-ancestor "$GITHUB_SHA" origin/master; then
-            echo "Release tags must point to a commit on master" >&2
-            exit 1
-          fi
-
-      - name: Download Linux artifacts
-        uses: actions/download-artifact@70fc10c6e5e1ce46ad2ea6f2b72d43f7d47b13c3 # v8.0.0
-        with:
-          pattern: vnidrop-*-linux-*-x64
-          path: build/release/linux
-          merge-multiple: true
-
-      - name: Verify artifacts and checksums
-        run: |
-          cd build/release/linux
-          shopt -s nullglob
-          deb_packages=(*.deb)
-          rpm_packages=(*.rpm)
-          checksum_files=(*.sha256)
-          if (( ${#deb_packages[@]} != 1 || ${#rpm_packages[@]} != 1 || ${#checksum_files[@]} != 2 )); then
-            echo "Expected one DEB, one RPM, and two checksum sidecars" >&2
-            exit 1
-          fi
-          version=${GITHUB_REF_NAME#v}
-          if [[ ${deb_packages[0]} != "vnidrop_${version}-1_amd64.deb" || ${rpm_packages[0]} != "vnidrop-${version}-1.x86_64.rpm" ]]; then
-            echo "Downloaded package names do not match tag $GITHUB_REF_NAME" >&2
-            exit 1
-          fi
-          sha256sum --check "${checksum_files[@]}"
-          sha256sum "${deb_packages[@]}" "${rpm_packages[@]}" > SHA256SUMS
-          rm -- "${checksum_files[@]}"
-
-      - name: Publish GitHub Release
-        env:
-          GH_TOKEN: ${{ github.token }}
-          GH_REPO: ${{ github.repository }}
-        run: |
-          tag=${GITHUB_REF_NAME}
-          version=${tag#v}
-          if gh release view "$tag" >/dev/null 2>&1; then
-            echo "GitHub Release $tag already exists; refusing to replace its assets" >&2
-            exit 1
-          fi
-          gh release create "$tag" \
-            build/release/linux/*.deb \
-            build/release/linux/*.rpm \
-            build/release/linux/SHA256SUMS \
-            --verify-tag \
-            --title "VniDrop $version" \
-            --generate-notes
--- a/.github/workflows/release-checks.yml
+++ b/.github/workflows/release-checks.yml
@@ -0,0 +1,53 @@
+name: Release pipeline checks
+
+on:
+  pull_request:
+    paths:
+      - ".github/workflows/android-release.yml"
+      - ".github/workflows/apple-release.yml"
+      - ".github/workflows/linux-packages.yml"
+      - ".github/workflows/release-checks.yml"
+      - ".github/workflows/release.yml"
+      - ".github/workflows/windows-store.yml"
+      - "packaging/android/**"
+      - "packaging/release/**"
+      - "packaging/version/**"
+      - "version.properties"
+      - "Makefile"
+  push:
+    branches:
+      - master
+    paths:
+      - ".github/workflows/android-release.yml"
+      - ".github/workflows/apple-release.yml"
+      - ".github/workflows/linux-packages.yml"
+      - ".github/workflows/release-checks.yml"
+      - ".github/workflows/release.yml"
+      - ".github/workflows/windows-store.yml"
+      - "packaging/android/**"
+      - "packaging/release/**"
+      - "packaging/version/**"
+      - "version.properties"
+      - "Makefile"
+
+permissions:
+  contents: read
+
+concurrency:
+  group: release-checks-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  scripts:
+    name: Validate release scripts
+    runs-on: ubuntu-24.04
+    timeout-minutes: 5
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+        with:
+          persist-credentials: false
+
+      - name: Run release checks
+        run: make check-release
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -0,0 +1,459 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - "v*.*.*"
+
+permissions:
+  contents: read
+
+concurrency:
+  group: vnidrop-release
+  cancel-in-progress: false
+
+jobs:
+  preflight:
+    name: Verify release tag
+    if: ${{ vars.RELEASE_PIPELINE_ENABLED == 'true' }}
+    runs-on: ubuntu-24.04
+    timeout-minutes: 10
+    outputs:
+      version: ${{ steps.version.outputs.app }}
+      android_code: ${{ steps.version.outputs.android_code }}
+
+    steps:
+      - name: Checkout release history
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+        with:
+          fetch-depth: 0
+          persist-credentials: false
+
+      - name: Verify canonical beta tag on current master
+        id: version
+        run: |
+          set -euo pipefail
+          packaging/version/resolve-version.sh verify >/dev/null
+          version="$(packaging/version/resolve-version.sh product)"
+          channel="$(packaging/version/resolve-version.sh channel)"
+          master_sha="$(git rev-parse origin/master)"
+          if [ "$GITHUB_SHA" != "$master_sha" ]; then
+            echo "Release tags must point at the current master commit" >&2
+            exit 1
+          fi
+          if [ "$channel" != "beta" ]; then
+            echo "Only beta closed-testing releases are enabled" >&2
+            exit 1
+          fi
+          echo "app=$version" >> "$GITHUB_OUTPUT"
+          echo "android_code=$(packaging/version/resolve-version.sh android-code)" >> "$GITHUB_OUTPUT"
+
+      - name: Refuse an existing GitHub Release
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          if gh release view "$GITHUB_REF_NAME" --repo "$GITHUB_REPOSITORY" >/dev/null 2>&1; then
+            echo "GitHub Release $GITHUB_REF_NAME already exists" >&2
+            exit 1
+          fi
+
+  linux:
+    name: Linux packages
+    needs: preflight
+    uses: ./.github/workflows/linux-packages.yml
+
+  windows:
+    name: Windows Store package
+    needs: preflight
+    uses: ./.github/workflows/windows-store.yml
+
+  macos:
+    name: Signed and notarized macOS package
+    needs: preflight
+    uses: ./.github/workflows/apple-release.yml
+    secrets: inherit
+
+  android:
+    name: Signed Android package
+    needs: preflight
+    uses: ./.github/workflows/android-release.yml
+    secrets: inherit
+
+  play-closed-testing:
+    name: Stage Play closed-testing draft
+    needs:
+      - preflight
+      - linux
+      - windows
+      - macos
+      - android
+    runs-on: ubuntu-24.04
+    timeout-minutes: 20
+    environment: play-closed-testing
+    permissions:
+      contents: read
+      id-token: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+        with:
+          persist-credentials: false
+
+      - name: Download signed Android artifacts
+        uses: actions/download-artifact@70fc10c6e5e1ce46ad2ea6f2b72d43f7d47b13c3 # v8.0.0
+        with:
+          name: vnidrop-${{ needs.preflight.outputs.version }}-android-release
+          path: build/release/android
+
+      - name: Validate closed-testing configuration
+        env:
+          WORKLOAD_IDENTITY_PROVIDER: ${{ vars.GCP_WORKLOAD_IDENTITY_PROVIDER }}
+          PLAY_SERVICE_ACCOUNT: ${{ vars.GCP_PLAY_SERVICE_ACCOUNT }}
+          PLAY_PACKAGE_NAME: ${{ vars.PLAY_PACKAGE_NAME }}
+          PLAY_CLOSED_TRACK: ${{ vars.PLAY_CLOSED_TRACK }}
+          PLAY_APP_SIGNING_CERT_SHA256: ${{ vars.PLAY_APP_SIGNING_CERT_SHA256 }}
+        run: |
+          for name in \
+            WORKLOAD_IDENTITY_PROVIDER \
+            PLAY_SERVICE_ACCOUNT \
+            PLAY_PACKAGE_NAME \
+            PLAY_CLOSED_TRACK \
+            PLAY_APP_SIGNING_CERT_SHA256; do
+            if [ -z "${!name:-}" ]; then
+              echo "Missing Play closed-testing configuration: $name" >&2
+              exit 1
+            fi
+          done
+          case "${PLAY_CLOSED_TRACK,,}" in
+            production|*:production)
+              echo "Production Play tracks are forbidden" >&2
+              exit 1
+              ;;
+          esac
+          if [ "$PLAY_PACKAGE_NAME" != "com.vnidrop.app" ]; then
+            echo "Unexpected Play package name: $PLAY_PACKAGE_NAME" >&2
+            exit 1
+          fi
+
+      - name: Authenticate to Google with GitHub OIDC
+        id: google-auth
+        uses: google-github-actions/auth@7c6bc770dae815cd3e89ee6cdf493a5fab2cc093 # v3
+        with:
+          workload_identity_provider: ${{ vars.GCP_WORKLOAD_IDENTITY_PROVIDER }}
+          service_account: ${{ vars.GCP_PLAY_SERVICE_ACCOUNT }}
+          token_format: access_token
+          access_token_scopes: https://www.googleapis.com/auth/androidpublisher
+
+      - name: Stage AAB and download Play-signed APK
+        env:
+          GOOGLE_PLAY_ACCESS_TOKEN: ${{ steps.google-auth.outputs.access_token }}
+          PLAY_PACKAGE_NAME: ${{ vars.PLAY_PACKAGE_NAME }}
+          PLAY_CLOSED_TRACK: ${{ vars.PLAY_CLOSED_TRACK }}
+          PLAY_APP_SIGNING_CERT_SHA256: ${{ vars.PLAY_APP_SIGNING_CERT_SHA256 }}
+          VERSION: ${{ needs.preflight.outputs.version }}
+          VERSION_CODE: ${{ needs.preflight.outputs.android_code }}
+        run: |
+          set -euo pipefail
+          shopt -s nullglob
+          bundles=(build/release/android/*.aab)
+          if [ "${#bundles[@]}" -ne 1 ]; then
+            echo "Expected exactly one signed AAB" >&2
+            exit 1
+          fi
+          mkdir -p build/release/play
+          python3 packaging/android/publish_play.py \
+            --bundle "${bundles[0]}" \
+            --package-name "$PLAY_PACKAGE_NAME" \
+            --track "$PLAY_CLOSED_TRACK" \
+            --version-code "$VERSION_CODE" \
+            --release-name "$VERSION" \
+            --expected-app-certificate "$PLAY_APP_SIGNING_CERT_SHA256" \
+            --apk-output "build/release/play/VniDrop-${VERSION}-${VERSION_CODE}-play-universal.apk" \
+            --metadata-output build/release/play/play-release.json
+
+      - name: Set up Android SDK verification tools
+        uses: android-actions/setup-android@9fc6c4e9069bf8d3d10b2204b1fb8f6ef7065407 # v3
+        with:
+          packages: "platform-tools build-tools;36.0.0"
+
+      - name: Verify Play-signed universal APK
+        env:
+          EXPECTED_CERT_SHA256: ${{ vars.PLAY_APP_SIGNING_CERT_SHA256 }}
+          VERSION: ${{ needs.preflight.outputs.version }}
+          VERSION_CODE: ${{ needs.preflight.outputs.android_code }}
+        run: |
+          set -euo pipefail
+          apk="build/release/play/VniDrop-${VERSION}-${VERSION_CODE}-play-universal.apk"
+          apkanalyzer_path="$(
+            find "$ANDROID_SDK_ROOT/cmdline-tools" -type f -name apkanalyzer -perm -111 |
+              sort -r |
+              head -1
+          )"
+          if [ -z "$apkanalyzer_path" ]; then
+            echo "apkanalyzer was not found" >&2
+            exit 1
+          fi
+          packaging/android/verify-apk-signature.sh \
+            "$apk" \
+            "$EXPECTED_CERT_SHA256" \
+            >/dev/null
+          if [ "$("$apkanalyzer_path" manifest application-id "$apk")" != "com.vnidrop.app" ]; then
+            echo "Play APK package name mismatch" >&2
+            exit 1
+          fi
+          if [ "$("$apkanalyzer_path" manifest version-name "$apk")" != "$VERSION" ]; then
+            echo "Play APK version name mismatch" >&2
+            exit 1
+          fi
+          if [ "$("$apkanalyzer_path" manifest version-code "$apk")" != "$VERSION_CODE" ]; then
+            echo "Play APK version code mismatch" >&2
+            exit 1
+          fi
+          (
+            cd build/release/play
+            sha256sum \
+              "VniDrop-${VERSION}-${VERSION_CODE}-play-universal.apk" \
+              play-release.json \
+              > SHA256SUMS
+          )
+
+      - name: Upload Play-signed APK
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: vnidrop-${{ needs.preflight.outputs.version }}-android-play
+          path: build/release/play/
+          if-no-files-found: error
+          retention-days: 90
+          compression-level: 0
+
+  publish-microsoft-store:
+    name: Submit Microsoft Store update
+    needs:
+      - preflight
+      - linux
+      - windows
+      - macos
+      - play-closed-testing
+    runs-on: windows-2025
+    timeout-minutes: 30
+    environment: microsoft-store
+    permissions:
+      contents: read
+
+    steps:
+      - name: Download Windows Store package
+        uses: actions/download-artifact@70fc10c6e5e1ce46ad2ea6f2b72d43f7d47b13c3 # v8.0.0
+        with:
+          name: vnidrop-${{ needs.preflight.outputs.version }}-windows-store-x64
+          path: build/release/windows
+
+      - name: Validate Microsoft Store configuration
+        id: store-package
+        shell: pwsh
+        env:
+          AZURE_AD_TENANT_ID: ${{ secrets.AZURE_AD_TENANT_ID }}
+          AZURE_AD_APPLICATION_CLIENT_ID: ${{ secrets.AZURE_AD_APPLICATION_CLIENT_ID }}
+          AZURE_AD_APPLICATION_SECRET: ${{ secrets.AZURE_AD_APPLICATION_SECRET }}
+          SELLER_ID: ${{ secrets.SELLER_ID }}
+          MICROSOFT_STORE_PRODUCT_ID: ${{ vars.MICROSOFT_STORE_PRODUCT_ID }}
+        run: |
+          $configuration = @{
+            AZURE_AD_TENANT_ID = $env:AZURE_AD_TENANT_ID
+            AZURE_AD_APPLICATION_CLIENT_ID = $env:AZURE_AD_APPLICATION_CLIENT_ID
+            AZURE_AD_APPLICATION_SECRET = $env:AZURE_AD_APPLICATION_SECRET
+            SELLER_ID = $env:SELLER_ID
+            MICROSOFT_STORE_PRODUCT_ID = $env:MICROSOFT_STORE_PRODUCT_ID
+          }
+          foreach ($entry in $configuration.GetEnumerator()) {
+            if ([string]::IsNullOrWhiteSpace($entry.Value) -or $entry.Value -eq "REPLACE_ME") {
+              throw "Missing Microsoft Store configuration: $($entry.Key)"
+            }
+          }
+          if ($env:MICROSOFT_STORE_PRODUCT_ID -ne "9NJ5Q0FG7TGL") {
+            throw "Unexpected Microsoft Store product ID: $env:MICROSOFT_STORE_PRODUCT_ID"
+          }
+          $packages = @(
+            Get-ChildItem build/release/windows -File -Filter *.msixupload -Recurse
+          )
+          if ($packages.Count -ne 1) {
+            throw "Expected exactly one msixupload package, found $($packages.Count)"
+          }
+          "path=$($packages[0].FullName)" >> $env:GITHUB_OUTPUT
+
+      - name: Set up Microsoft Store Developer CLI
+        uses: microsoft/microsoft-store-apppublisher@15abd1c50fcc164b19cb240fb04ef3c49bf715a2 # v1.1
+        with:
+          version: v0.3.9
+
+      - name: Authenticate and verify Store access
+        shell: pwsh
+        env:
+          AZURE_AD_TENANT_ID: ${{ secrets.AZURE_AD_TENANT_ID }}
+          AZURE_AD_APPLICATION_CLIENT_ID: ${{ secrets.AZURE_AD_APPLICATION_CLIENT_ID }}
+          AZURE_AD_APPLICATION_SECRET: ${{ secrets.AZURE_AD_APPLICATION_SECRET }}
+          SELLER_ID: ${{ secrets.SELLER_ID }}
+          MICROSOFT_STORE_PRODUCT_ID: ${{ vars.MICROSOFT_STORE_PRODUCT_ID }}
+        run: |
+          msstore settings --enableTelemetry false
+          if ($LASTEXITCODE -ne 0) {
+            throw "Failed to disable Microsoft Store CLI telemetry"
+          }
+          msstore reconfigure `
+            --tenantId "$env:AZURE_AD_TENANT_ID" `
+            --sellerId "$env:SELLER_ID" `
+            --clientId "$env:AZURE_AD_APPLICATION_CLIENT_ID" `
+            --clientSecret "$env:AZURE_AD_APPLICATION_SECRET"
+          if ($LASTEXITCODE -ne 0) {
+            throw "Microsoft Store authentication failed"
+          }
+          msstore apps get "$env:MICROSOFT_STORE_PRODUCT_ID"
+          if ($LASTEXITCODE -ne 0) {
+            throw "The Microsoft Store application is not accessible"
+          }
+
+      - name: Publish package to Microsoft Store
+        shell: pwsh
+        env:
+          MICROSOFT_STORE_PRODUCT_ID: ${{ vars.MICROSOFT_STORE_PRODUCT_ID }}
+          STORE_PACKAGE: ${{ steps.store-package.outputs.path }}
+        run: |
+          msstore publish "$env:STORE_PACKAGE" `
+            --appId "$env:MICROSOFT_STORE_PRODUCT_ID"
+          if ($LASTEXITCODE -ne 0) {
+            throw "Microsoft Store package publication failed"
+          }
+
+      - name: Summarize Store submission
+        shell: pwsh
+        env:
+          VERSION: ${{ needs.preflight.outputs.version }}
+          MICROSOFT_STORE_PRODUCT_ID: ${{ vars.MICROSOFT_STORE_PRODUCT_ID }}
+        run: |
+          "### Microsoft Store submission" >> $env:GITHUB_STEP_SUMMARY
+          "- App version: $env:VERSION" >> $env:GITHUB_STEP_SUMMARY
+          "- Product ID: $env:MICROSOFT_STORE_PRODUCT_ID" >> $env:GITHUB_STEP_SUMMARY
+          "- Package submitted for certification" >> $env:GITHUB_STEP_SUMMARY
+
+  publish-github:
+    name: Publish coordinated GitHub Release
+    needs:
+      - preflight
+      - linux
+      - windows
+      - macos
+      - play-closed-testing
+      - publish-microsoft-store
+    runs-on: ubuntu-24.04
+    timeout-minutes: 20
+    permissions:
+      contents: write
+      id-token: write
+      attestations: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+        with:
+          persist-credentials: false
+
+      - name: Download Debian package
+        uses: actions/download-artifact@70fc10c6e5e1ce46ad2ea6f2b72d43f7d47b13c3 # v8.0.0
+        with:
+          name: vnidrop-${{ needs.preflight.outputs.version }}-linux-deb-x64
+          path: build/release/downloads/deb
+
+      - name: Download RPM package
+        uses: actions/download-artifact@70fc10c6e5e1ce46ad2ea6f2b72d43f7d47b13c3 # v8.0.0
+        with:
+          name: vnidrop-${{ needs.preflight.outputs.version }}-linux-rpm-x64
+          path: build/release/downloads/rpm
+
+      - name: Download macOS package
+        uses: actions/download-artifact@70fc10c6e5e1ce46ad2ea6f2b72d43f7d47b13c3 # v8.0.0
+        with:
+          name: vnidrop-${{ needs.preflight.outputs.version }}-macos-dmg
+          path: build/release/downloads/macos
+
+      - name: Download Windows Store package
+        uses: actions/download-artifact@70fc10c6e5e1ce46ad2ea6f2b72d43f7d47b13c3 # v8.0.0
+        with:
+          name: vnidrop-${{ needs.preflight.outputs.version }}-windows-store-x64
+          path: build/release/downloads/windows
+
+      - name: Download Play-signed APK
+        uses: actions/download-artifact@70fc10c6e5e1ce46ad2ea6f2b72d43f7d47b13c3 # v8.0.0
+        with:
+          name: vnidrop-${{ needs.preflight.outputs.version }}-android-play
+          path: build/release/downloads/play
+
+      - name: Verify and assemble public release assets
+        run: packaging/release/assemble-release.sh
+
+      - name: Attest release provenance
+        uses: actions/attest@f7c74d28b9d84cb8768d0b8ca14a4bac6ef463e6 # v4
+        with:
+          subject-path: build/release/final/*
+
+      - name: Create GitHub Release
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          gh release create "$GITHUB_REF_NAME" \
+            build/release/final/* \
+            --repo "$GITHUB_REPOSITORY" \
+            --verify-tag \
+            --title "VniDrop ${{ needs.preflight.outputs.version }}" \
+            --generate-notes
+
+  update-homebrew:
+    name: Update Homebrew cask
+    needs:
+      - preflight
+      - macos
+      - publish-github
+    runs-on: ubuntu-24.04
+    timeout-minutes: 15
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+        with:
+          persist-credentials: false
+
+      - name: Download macOS package
+        uses: actions/download-artifact@70fc10c6e5e1ce46ad2ea6f2b72d43f7d47b13c3 # v8.0.0
+        with:
+          name: vnidrop-${{ needs.preflight.outputs.version }}-macos-dmg
+          path: dist
+
+      - name: Render Homebrew cask
+        env:
+          VERSION: ${{ needs.preflight.outputs.version }}
+        run: |
+          set -euo pipefail
+          sha="$(sha256sum "dist/VniDrop-${VERSION}.dmg" | cut -d' ' -f1)"
+          sed -e "s/^  version \".*\"/  version \"${VERSION}\"/" \
+              -e "s/^  sha256 \".*\"/  sha256 \"${sha}\"/" \
+              packaging/homebrew/vnidrop.rb > /tmp/vnidrop.rb
+
+      - name: Push cask to tap
+        env:
+          TAP_TOKEN: ${{ secrets.HOMEBREW_TAP_TOKEN }}
+          VERSION: ${{ needs.preflight.outputs.version }}
+        run: |
+          set -euo pipefail
+          git clone \
+            "https://x-access-token:${TAP_TOKEN}@github.com/sudosylabs/homebrew-vnidrop.git" \
+            tap
+          mkdir -p tap/Casks
+          cp /tmp/vnidrop.rb tap/Casks/vnidrop.rb
+          cd tap
+          git config user.name "vnidrop-release-bot"
+          git config user.email "release-bot@users.noreply.github.com"
+          git add Casks/vnidrop.rb
+          git commit -m "vnidrop ${VERSION}" || {
+            echo "Homebrew cask already matches ${VERSION}"
+            exit 0
+          }
+          git push
--- a/.github/workflows/rust-core.yml
+++ b/.github/workflows/rust-core.yml
@@ -6,6 +6,8 @@ on:
      - "Cargo.toml"
      - "Cargo.lock"
      - "crates/vnidrop/**"
+      - "version.properties"
+      - "packaging/version/**"
      - "Makefile"
      - "config.mk"
      - "make/**"
@@ -19,6 +21,8 @@ on:
      - "Cargo.toml"
      - "Cargo.lock"
      - "crates/vnidrop/**"
+      - "version.properties"
+      - "packaging/version/**"
      - "Makefile"
      - "config.mk"
      - "make/**"
--- a/.github/workflows/shared-kmp.yml
+++ b/.github/workflows/shared-kmp.yml
@@ -4,6 +4,8 @@ on:
  pull_request:
    paths:
      - "shared/**"
+      - "version.properties"
+      - "packaging/version/**"
      - "crates/vnidrop/**"
      - "Cargo.toml"
      - "Cargo.lock"
@@ -24,6 +26,8 @@ on:
      - master
    paths:
      - "shared/**"
+      - "version.properties"
+      - "packaging/version/**"
      - "crates/vnidrop/**"
      - "Cargo.toml"
      - "Cargo.lock"
--- a/.github/workflows/windows-store.yml
+++ b/.github/workflows/windows-store.yml
@@ -5,6 +5,8 @@ on:
    paths:
      - ".github/workflows/windows-store.yml"
      - "packaging/windows/**"
+      - "packaging/version/**"
+      - "version.properties"
      - "assets/windows/**"
      - "desktopApp/**"
      - "shared/**"
@@ -17,16 +19,8 @@ on:
      - "gradle/**"
      - "gradlew"
      - "gradlew.bat"
-  push:
-    tags:
-      - "v*.*.*"
+  workflow_call:
  workflow_dispatch:
-    inputs:
-      version:
-        description: Release version in MAJOR.MINOR.PATCH form
-        required: true
-        default: "1.0.0"
-        type: string

 permissions:
  contents: read
@@ -77,37 +71,13 @@ jobs:
          restore-keys: |
            windows-x64-cargo-1.91.0-

-      - name: Resolve Store version
+      - name: Resolve canonical version
        id: version
        shell: pwsh
-        env:
-          REQUESTED_VERSION: ${{ inputs.version || '1.0.0' }}
        run: |
-          $version = $env:REQUESTED_VERSION
-          if ($env:GITHUB_REF_TYPE -eq "tag") {
-            if ($env:GITHUB_REF_NAME -notmatch "^v[0-9]+\.[0-9]+\.[0-9]+$") {
-              throw "Store release tags must use vMAJOR.MINOR.PATCH"
-            }
-            $version = $env:GITHUB_REF_NAME.Substring(1)
-          }
-
-          if ($version -notmatch "^[0-9]+\.[0-9]+\.[0-9]+$") {
-            throw "Version must use MAJOR.MINOR.PATCH"
-          }
-          $parts = $version.Split(".")
-          for ($index = 0; $index -lt $parts.Count; $index++) {
-            $part = $parts[$index]
-            $number = 0
-            if (-not [int]::TryParse($part, [ref] $number) -or $number.ToString() -ne $part) {
-              throw "Version components must be canonical integers"
-            }
-            if ($number -lt $(if ($index -eq 0) { 1 } else { 0 }) -or $number -gt 65535) {
-              throw "Version components must be between 0 and 65535, with a non-zero major"
-            }
-          }
-
-          "app=$version" >> $env:GITHUB_OUTPUT
-          "package=$version.0" >> $env:GITHUB_OUTPUT
+          $version = .\packaging\version\resolve-version.ps1 -Field Json -VerifyTag | ConvertFrom-Json
+          "app=$($version.productVersion)" >> $env:GITHUB_OUTPUT
+          "package=$($version.windowsPackageVersion)" >> $env:GITHUB_OUTPUT

      - name: Test and build release app image
        shell: pwsh
@@ -115,7 +85,6 @@ jobs:
          $arguments = @(
            ":shared:jvmTest"
            ":desktopApp:createReleaseDistributable"
-            "-Pvnidrop.version=${{ steps.version.outputs.app }}"
            "-Pvnidrop.desktop.rustVariant=release"
            "-Pvnidrop.diagnostics.included=false"
            "--no-daemon"
@@ -131,7 +100,6 @@ jobs:
        shell: pwsh
        run: |
          $arguments = @{
-            Version = "${{ steps.version.outputs.app }}"
            AppImage = ".\desktopApp\build\compose\binaries\main-release\app\VniDrop"
            OutputDirectory = ".\build\release\windows"
          }
--- a/.gitignore
+++ b/.gitignore
@@ -25,3 +25,4 @@ config.override.mk
 output/
 .screenshots
 apple/RELEASE-MACOS.md
+apple/Generated/*.xcconfig
--- a/34
+++ b/34
@@ -12,14 +12,14 @@ include $(ROOT)/make/release.mk
 .PHONY: format test check check-rust audit-rust test-rust test-rust-all
 .PHONY: test-rust-transfer test-rust-approval test-rust-lifecycle test-rust-output-sink
 .PHONY: check-shared test-shared test-android-host check-android verify-android-libs build-android run-desktop
-.PHONY: apple-core apple-project open-apple-project open-apple build-apple-macos build-apple-ios check-apple
-.PHONY: check-localization localization localization-migrate
+.PHONY: apple-core apple-version-config apple-project open-apple-project open-apple build-apple-macos build-apple-ios check-apple
+.PHONY: prepare-release check-version check-release check-localization localization localization-migrate
 .PHONY: check-docs run-docs check-diagnostics run-diagnostics diagnostics-db-local diagnostics-db-remote diagnostics-typegen deploy-diagnostics

 help: ## Show available commands and common configuration variables.
 	@grep -hE '^[A-Za-z0-9_.-]+:.*## ' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*## "} {printf "  %-28s %s\n", $$1, $$2}'
 	@printf '\nCommon variables:\n'
-	@printf '  %-28s %s\n' 'VERSION=x.y.z' 'Package version (default: $(VERSION))'
+	@printf '  %-28s %s\n' 'version.properties' 'Canonical application version ($(VERSION))'
 	@printf '  %-28s %s\n' 'APPLE_PROFILE=debug|release' 'Rust profile for the Apple XCFramework'
 	@printf '  %-28s %s\n' 'APPLE_CONFIGURATION=...' 'Xcode configuration (default: $(APPLE_CONFIGURATION))'
 	@printf '  %-28s %s\n' 'APPLE_DESTINATION=...' 'Optional xcodebuild destination override'
@@ -59,7 +59,24 @@ format: ## Format Rust sources.

 test: test-rust test-shared ## Run the main Rust and shared JVM test suites.

-check: check-rust check-shared check-localization check-docs check-diagnostics ## Run portable pre-PR verification.
+check: check-version check-rust check-shared check-localization check-docs check-diagnostics ## Run portable pre-PR verification.
+
+prepare-release: ## Update PRODUCT_VERSION and show its derived store versions (RELEASE_VERSION=x.y.z).
+	@test -n "$(RELEASE_VERSION)" || { printf 'Usage: make prepare-release RELEASE_VERSION=x.y.z\n' >&2; exit 1; }
+	cd $(ROOT) && packaging/version/prepare-release.sh "$(RELEASE_VERSION)"
+
+check-version: ## Validate the canonical version and its platform mappings.
+	cd $(ROOT) && packaging/version/test-version.sh
+	cd $(ROOT) && packaging/version/resolve-version.sh verify
+	cd $(ROOT) && $(GRADLE) verifyVersion $(GRADLE_FLAGS)
+
+check-release: ## Validate coordinated release scripts and workflow YAML.
+	cd $(ROOT) && bash -n packaging/android/build-release.sh packaging/android/verify-apk-signature.sh packaging/android/tests/test_verify_apk_signature.sh packaging/release/assemble-release.sh packaging/release/test-assemble-release.sh packaging/release/test-release-config.sh
+	cd $(ROOT) && packaging/android/tests/test_verify_apk_signature.sh
+	cd $(ROOT) && packaging/release/test-assemble-release.sh
+	cd $(ROOT) && packaging/release/test-release-config.sh
+	cd $(ROOT) && python3 -m unittest discover -s packaging/android/tests -v
+	cd $(ROOT) && ruby -e 'require "yaml"; ARGV.each { |file| YAML.load_file(file) }' .github/workflows/*.yml

 check-rust: ## Run Rust formatting, lint, tests, and documentation checks.
 	cd $(ROOT) && $(CARGO) fmt --all -- --check
@@ -113,7 +130,10 @@ apple-core: ## Build the Rust XCFramework and generated Swift bindings.
 	@test "$(HOST_OS)" = macos || { printf 'Apple builds require macOS.\n' >&2; exit 1; }
 	cd $(ROOT) && apple/scripts/build-core.sh $(APPLE_PROFILE)

-apple-project: apple-core localization ## Generate the native Apple Xcode project.
+apple-version-config: ## Generate derived Store and Direct Apple build settings.
+	cd $(ROOT) && packaging/version/generate-apple-xcconfig.sh all
+
+apple-project: apple-core localization apple-version-config ## Generate the native Apple Xcode project.
 	cd $(ROOT)/apple && $(XCODEGEN) generate

 open-apple-project: apple-project ## Generate and open the native Apple Xcode project.
@@ -125,8 +145,8 @@ build-apple-macos: apple-project ## Build the native macOS app (unsigned by defa
 build-apple-macos-direct: apple-project ## Build the direct-download macOS target (Sparkle, unsigned) — CI compile check.
 	cd $(ROOT)/apple && $(XCODEBUILD) -project VniDrop.xcodeproj -scheme VniDropDirect -configuration Release-Direct -derivedDataPath "$(APPLE_DERIVED_DATA)" -destination 'platform=macOS' CODE_SIGNING_ALLOWED=NO CODE_SIGNING_REQUIRED=NO build

-build-apple-dmg: ## Build the signed/notarized direct-download .dmg (see apple/RELEASE-MACOS.md for required env).
-	cd $(ROOT) && apple/scripts/build-dmg.sh $(VERSION)
+build-apple-dmg: localization ## Build the signed/notarized direct-download .dmg (see apple/RELEASE-MACOS.md for required env).
+	cd $(ROOT) && apple/scripts/build-dmg.sh

 open-apple: build-apple-macos ## Build and launch the native macOS app.
 	@test -d "$(APPLE_DERIVED_DATA)/Build/Products/$(APPLE_CONFIGURATION)/VniDrop.app" || { printf 'Built macOS app was not found.\n' >&2; exit 1; }
--- a/androidApp/build.gradle.kts
+++ b/androidApp/build.gradle.kts
@@ -24,7 +24,7 @@ abstract class VerifyVnidropLibrariesTask : DefaultTask() {
 				archive.getEntry(path)?.size?.takeIf { it > 0L } == null
 			}
 			check(missing.isEmpty()) {
-				"Debug APK has missing or empty VniDrop libraries: ${missing.joinToString()}"
+				"APK has missing or empty VniDrop libraries: ${missing.joinToString()}"
 			}
 		}
 	}
@@ -37,6 +37,22 @@ plugins {
 	alias(libs.plugins.composeCompiler)
 }

+val appVersion = rootProject.extra["vnidrop.productVersion"] as String
+val androidVersionCode = rootProject.extra["vnidrop.androidVersionCode"] as Int
+val releaseKeystorePath = providers.environmentVariable("VNIDROP_ANDROID_KEYSTORE_PATH").orNull
+val releaseKeystorePassword = providers.environmentVariable("VNIDROP_ANDROID_KEYSTORE_PASSWORD").orNull
+val releaseKeyAlias = providers.environmentVariable("VNIDROP_ANDROID_KEY_ALIAS").orNull
+val releaseKeyPassword = providers.environmentVariable("VNIDROP_ANDROID_KEY_PASSWORD").orNull
+val releaseSigningValues = listOf(
+	releaseKeystorePath,
+	releaseKeystorePassword,
+	releaseKeyAlias,
+	releaseKeyPassword,
+)
+require(releaseSigningValues.all { it == null } || releaseSigningValues.all { it != null }) {
+	"Android release signing requires the keystore path, keystore password, key alias, and key password together"
+}
+
 kotlin {
 	compilerOptions {
 		jvmTarget = JvmTarget.JVM_11
@@ -55,12 +71,26 @@ android {
 	namespace = "com.vnidrop.app"
 	compileSdk = libs.versions.android.compileSdk.get().toInt()

+	signingConfigs {
+		if (releaseKeystorePath != null) {
+			create("release") {
+				val keystoreFile = rootProject.file(releaseKeystorePath)
+					.also { require(it.isFile) { "Android release keystore was not found" } }
+					.also { require(it.canRead()) { "Android release keystore is not readable" } }
+				storeFile = keystoreFile
+				storePassword = releaseKeystorePassword
+				keyAlias = releaseKeyAlias
+				keyPassword = releaseKeyPassword
+			}
+		}
+	}
+
 	defaultConfig {
 		applicationId = "com.vnidrop.app"
 		minSdk = libs.versions.android.minSdk.get().toInt()
 		targetSdk = libs.versions.android.targetSdk.get().toInt()
-		versionCode = 1
-		versionName = "1.0"
+		versionCode = androidVersionCode
+		versionName = appVersion
 	}
 	packaging {
 		resources {
@@ -76,6 +106,7 @@ android {
 	buildTypes {
 		getByName("release") {
 			isMinifyEnabled = false
+			signingConfig = signingConfigs.findByName("release")
 		}
 	}
 	compileOptions {
@@ -87,6 +118,10 @@ android {
 			jniLibs.srcDir(project(":shared").layout.buildDirectory.dir("intermediates/rust/aarch64-linux-android/debug"))
 			jniLibs.srcDir(project(":shared").layout.buildDirectory.dir("intermediates/rust/x86_64-linux-android/debug"))
 		}
+		getByName("release") {
+			jniLibs.srcDir(project(":shared").layout.buildDirectory.dir("intermediates/rust/aarch64-linux-android/release"))
+			jniLibs.srcDir(project(":shared").layout.buildDirectory.dir("intermediates/rust/x86_64-linux-android/release"))
+		}
 	}
 }

@@ -97,6 +132,12 @@ tasks.configureEach {
 			":shared:copyAndroidAndroidX64Debug",
 		)
 	}
+	if (name == "mergeReleaseJniLibFolders" || name == "mergeReleaseNativeLibs") {
+		dependsOn(
+			":shared:copyAndroidAndroidArm64Release",
+			":shared:copyAndroidAndroidX64Release",
+		)
+	}
 }

 val verifyDebugVnidropLibraries = tasks.register<VerifyVnidropLibrariesTask>("verifyDebugVnidropLibraries") {
--- a/androidApp/src/main/AndroidManifest.xml
+++ b/androidApp/src/main/AndroidManifest.xml
@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+<manifest
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:tools="http://schemas.android.com/tools">

 	<uses-permission android:name="android.permission.INTERNET"/>
 	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
@@ -38,7 +40,7 @@
 				<data android:mimeType="application/vnd.vnidrop.transfer"/>
 			</intent-filter>
 			<!-- Fallback: .vnd files often arrive as octet-stream / unknown MIME. -->
-			<intent-filter>
+			<intent-filter tools:ignore="AppLinkUrlError">
 				<action android:name="android.intent.action.VIEW"/>
 				<category android:name="android.intent.category.DEFAULT"/>
 				<category android:name="android.intent.category.BROWSABLE"/>
--- a/apple/README.md
+++ b/apple/README.md
@@ -40,6 +40,12 @@ make build-apple-ios     # unsigned iOS simulator app
 make check-apple         # iOS simulator tests
 ```

+`make apple-project` also generates ignored Store and Direct version xcconfig
+files. Their `CURRENT_PROJECT_VERSION` values come from the central version
+resolver as UTC `YYYYMMDD.HHMM.SS` build identifiers. Regenerate the project
+before creating another App Store archive so it receives a fresh build number;
+direct DMG builds refresh their own value automatically.
+
 ### macOS shipping channels

 The macOS app ships through two targets that build identical sources:
@@ -52,7 +58,7 @@ The macOS app ships through two targets that build identical sources:

 ```bash
 make build-apple-macos-direct   # unsigned compile-check of the direct target
-make build-apple-dmg VERSION=x.y.z  # signed (+ notarized) .dmg
+make build-apple-dmg                # signed (+ notarized) .dmg
 ```

 Full signing, notarization, appcast, and cask flow: see
--- a/apple/VniDrop/Platform/AppDependencies+iOS.swift
+++ b/apple/VniDrop/Platform/AppDependencies+iOS.swift
@@ -6,7 +6,7 @@ import UIKit
@MainActor
 func makeAppDependencies(externalInvitations: ExternalInvitationController) -> AppDependencies {
 	let device = UIDevice.current
-	let version = Bundle.main.object(forInfoDictionaryKey: "CFBundleShortVersionString") as? String ?? "0.1.0"
+	let version = Bundle.main.object(forInfoDictionaryKey: "CFBundleShortVersionString") as? String ?? "unknown"
 	let env = PlatformEnvironment(
 		name: "\(device.systemName) \(device.systemVersion)",
 		appVersion: version,
--- a/apple/VniDrop/Platform/AppDependencies+macOS.swift
+++ b/apple/VniDrop/Platform/AppDependencies+macOS.swift
@@ -5,7 +5,7 @@ import AppKit
 /// Builds the macOS dependency graph, mirroring `rememberIosAppDependencies`.
@MainActor
 func makeAppDependencies(externalInvitations: ExternalInvitationController) -> AppDependencies {
-	let version = Bundle.main.object(forInfoDictionaryKey: "CFBundleShortVersionString") as? String ?? "0.1.0"
+	let version = Bundle.main.object(forInfoDictionaryKey: "CFBundleShortVersionString") as? String ?? "unknown"
 	let host = Host.current().localizedName ?? "Mac"
 	let env = PlatformEnvironment(
 		name: "macOS " + ProcessInfo.processInfo.operatingSystemVersionString,
--- a/apple/project.yml
+++ b/apple/project.yml
@@ -1,9 +1,11 @@
 # XcodeGen spec for the native SwiftUI VniDrop app (iOS/iPadOS/macOS).
 # Regenerate the project with:  xcodegen generate  (run from apple/)
-# Requires two generated inputs first (both gitignored), before xcodegen:
+# Requires three generated inputs first (all gitignored), before xcodegen:
 #   - Rust core:      apple/scripts/build-core.sh debug
 #   - Localization:   (cd localization && bun run src/cli.ts generate)
 #                     -> VniDrop/Resources/Localizable.xcstrings, VniDrop/Generated/L10n.swift
+#   - Versions:       packaging/version/generate-apple-xcconfig.sh all
+#                     -> Generated/StoreVersion.xcconfig, Generated/DirectVersion.xcconfig
 name: VniDrop
 options:
  bundleIdPrefix: com.vnidrop
@@ -50,10 +52,6 @@ packages:
 targetTemplates:
  AppBase:
    type: application
-    configFiles:
-      Debug: Signing.xcconfig
-      Release: Signing.xcconfig
-      Release-Direct: Signing.xcconfig
    sources:
      - path: VniDrop
        excludes:
@@ -65,11 +63,7 @@ targetTemplates:
      base:
        PRODUCT_NAME: VniDrop
        PRODUCT_BUNDLE_IDENTIFIER: com.vnidrop.app
-        MARKETING_VERSION: "0.1.0"
-        # Placeholder only — the real CFBundleVersion is stamped at build time as a
-        # UTC YYMMDD.HHMM timestamp by the "Stamp build number" phase below, so every
-        # build is monotonic and self-describing (shown as "MARKETING_VERSION (build)").
-        CURRENT_PROJECT_VERSION: "1"
+        MARKETING_VERSION: "$(PRODUCT_VERSION)"
        GENERATE_INFOPLIST_FILE: NO
        INFOPLIST_FILE: VniDrop/Resources/Info.plist
        CODE_SIGN_ENTITLEMENTS: VniDrop/Resources/VniDrop.entitlements
@@ -111,29 +105,16 @@ targetTemplates:
            echo "error: SwiftLint not installed — run 'brew install swiftlint'"
            exit 1
          fi
-    postBuildScripts:
-      # Stamp CFBundleVersion as a UTC YYMMDD.HHMM timestamp into the built
-      # Info.plist before code signing. Runs for every build (Xcode GUI archive and
-      # CLI alike), so both the App Store and direct-download channels get a
-      # monotonic, meaningful build id. CI/reproducible builds can pin it via the
-      # VNIDROP_BUILD env var. MARKETING_VERSION stays the human X.Y.Z version.
-      - name: Stamp build number (UTC timestamp)
-        basedOnDependencyAnalysis: false
-        script: |
-          build="${VNIDROP_BUILD:-$(date -u +%y%m%d.%H%M)}"
-          plist="${TARGET_BUILD_DIR}/${INFOPLIST_PATH}"
-          if [ -f "$plist" ]; then
-            /usr/libexec/PlistBuddy -c "Set :CFBundleVersion $build" "$plist"
-            echo "Stamped CFBundleVersion = $build"
-          else
-            echo "warning: Info.plist not found at $plist; CFBundleVersion not stamped"
-          fi

 targets:
  # App Store / TestFlight target. iOS + macOS, sandboxed, no self-updater.
  VniDrop:
    templates: [AppBase]
    supportedDestinations: [iOS, macOS]
+    configFiles:
+      Debug: Generated/StoreVersion.xcconfig
+      Release: Generated/StoreVersion.xcconfig
+      Release-Direct: Generated/StoreVersion.xcconfig

  # Direct-download macOS target: Developer ID signed, notarized, ships in a .dmg
  # and self-updates via Sparkle. DIRECT_DISTRIBUTION gates all Sparkle code so the
@@ -141,6 +122,10 @@ targets:
  VniDropDirect:
    templates: [AppBase]
    supportedDestinations: [macOS]
+    configFiles:
+      Debug: Generated/DirectVersion.xcconfig
+      Release: Generated/DirectVersion.xcconfig
+      Release-Direct: Generated/DirectVersion.xcconfig
    settings:
      base:
        SWIFT_ACTIVE_COMPILATION_CONDITIONS: "$(inherited) DIRECT_DISTRIBUTION"
--- a/apple/scripts/build-dmg.sh
+++ b/apple/scripts/build-dmg.sh
@@ -7,8 +7,7 @@
 # This is the direct-distribution counterpart to the App Store archive flow; it
 # never touches the App Store `VniDrop` target. The Rust crate is not modified.
 #
-# Usage: apple/scripts/build-dmg.sh [version]
-#   version   MAJOR.MINOR.PATCH; defaults to MARKETING_VERSION / the git tag.
+# Usage: apple/scripts/build-dmg.sh
 #
 # Environment:
 #   DEVELOPER_ID_APP   Codesign identity, e.g. "Developer ID Application: … (TEAMID)".
@@ -29,29 +28,14 @@ PROJECT="$APPLE_DIR/VniDrop.xcodeproj"
 SCHEME="VniDropDirect"
 CONFIG="Release-Direct"
 APP_NAME="VniDrop"
+VERSION_RESOLVER="$REPO_ROOT/packaging/version/resolve-version.sh"
+VERSION_CONFIG_GENERATOR="$REPO_ROOT/packaging/version/generate-apple-xcconfig.sh"

-# --- Resolve version (arg > git tag > project MARKETING_VERSION) -------------
-resolve_version() {
-	local v="${1:-}"
-	if [ -z "$v" ] && [ "${GITHUB_REF_TYPE:-}" = "tag" ]; then
-		v="${GITHUB_REF_NAME#v}"
-	fi
-	if [ -z "$v" ]; then
-		v="$(sed -nE 's/.*MARKETING_VERSION: "([0-9.]+)".*/\1/p' "$APPLE_DIR/project.yml" | head -1)"
-	fi
-	if [[ ! "$v" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
-		echo "version must be MAJOR.MINOR.PATCH (got '$v')" >&2
-		exit 1
-	fi
-	printf '%s' "$v"
-}
-VERSION="$(resolve_version "${1:-}")"
-
-# CFBundleVersion is a UTC YYMMDD.HHMM timestamp stamped by the target's
-# "Stamp build number" build phase. Pin it here (one value for the whole archive)
-# so the app, DMG, and appcast all agree; Sparkle compares it to order updates.
-BUILD_NUMBER="$(date -u +%y%m%d.%H%M)"
-export VNIDROP_BUILD="$BUILD_NUMBER"
+VERSION="$("$VERSION_RESOLVER" product)"
+export VNIDROP_BUILD_TIME_UTC="${VNIDROP_BUILD_TIME_UTC:-$(date -u +%Y%m%d%H%M%S)}"
+BUILD_NUMBER="$("$VERSION_RESOLVER" apple-direct-build)"
+"$VERSION_RESOLVER" verify >/dev/null
+BUILD_METADATA="$DIST_DIR/$APP_NAME-$VERSION.build-info.json"

 # --- Resolve signing identity ------------------------------------------------
 if [ -z "${DEVELOPER_ID_APP:-}" ]; then
@@ -76,6 +60,7 @@ echo "    team:     ${DEVELOPMENT_TEAM:-<unknown>}"
 echo "==> Building Rust core (release)"
 CARGO_PROFILE_RELEASE_LTO=false "$SCRIPT_DIR/build-core.sh" release
 echo "==> Regenerating Xcode project"
+"$VERSION_CONFIG_GENERATOR" all
 ( cd "$APPLE_DIR" && xcodegen generate >/dev/null )

 rm -rf "$BUILD_DIR" && mkdir -p "$BUILD_DIR" "$DIST_DIR"
@@ -107,6 +92,18 @@ xcodebuild -exportArchive \
 	-exportOptionsPlist "$EXPORT_OPTS"
 APP="$EXPORT_DIR/$APP_NAME.app"
 [ -d "$APP" ] || { echo "error: export failed" >&2; exit 1; }
+ACTUAL_VERSION="$(/usr/libexec/PlistBuddy -c 'Print :CFBundleShortVersionString' \
+	"$APP/Contents/Info.plist")"
+ACTUAL_BUILD="$(/usr/libexec/PlistBuddy -c 'Print :CFBundleVersion' \
+	"$APP/Contents/Info.plist")"
+[ "$ACTUAL_VERSION" = "$VERSION" ] || {
+	echo "error: exported app version $ACTUAL_VERSION does not match $VERSION" >&2
+	exit 1
+}
+[ "$ACTUAL_BUILD" = "$BUILD_NUMBER" ] || {
+	echo "error: exported app build $ACTUAL_BUILD does not match $BUILD_NUMBER" >&2
+	exit 1
+}

 # --- Build the DMG -----------------------------------------------------------
 DMG="$DIST_DIR/$APP_NAME-$VERSION.dmg"
@@ -152,7 +149,18 @@ else
 fi

 SIZE="$(stat -f%z "$DMG")"
+jq -n \
+	--arg productVersion "$VERSION" \
+	--arg directBuildNumber "$BUILD_NUMBER" \
+	--arg artifact "$(basename "$DMG")" \
+	'{
+		productVersion: $productVersion,
+		directBuildNumber: $directBuildNumber,
+		distribution: "direct",
+		artifact: $artifact
+	}' > "$BUILD_METADATA"
 echo "==> Done."
 echo "    dmg:     $DMG"
 echo "    version: $VERSION"
+echo "    build:   $BUILD_NUMBER"
 echo "    size:    $SIZE bytes"
--- a/apple/scripts/generate-appcast.sh
+++ b/apple/scripts/generate-appcast.sh
@@ -9,7 +9,7 @@
 # keychain). The resulting appcast.xml is uploaded as a release asset; the app's
 # SUFeedURL (/releases/latest/download/appcast.xml) always resolves to the newest.
 #
-# Usage: apple/scripts/generate-appcast.sh [version]
+# Usage: apple/scripts/generate-appcast.sh
 #
 # Environment:
 #   DIST_DIR              Folder holding the DMG(s). Default: apple/dist
@@ -24,12 +24,10 @@ REPO_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
 APPLE_DIR="$REPO_ROOT/apple"
 DIST_DIR="${DIST_DIR:-$APPLE_DIR/dist}"
 RELEASE_REPO="${RELEASE_REPO:-sudosylabs/vnidrop}"
+VERSION_RESOLVER="$REPO_ROOT/packaging/version/resolve-version.sh"

-VERSION="${1:-}"
-if [ -z "$VERSION" ] && [ "${GITHUB_REF_TYPE:-}" = "tag" ]; then
-	VERSION="${GITHUB_REF_NAME#v}"
-fi
-[ -n "$VERSION" ] || { echo "error: version required (arg or tag)" >&2; exit 1; }
+VERSION="$("$VERSION_RESOLVER" product)"
+"$VERSION_RESOLVER" verify >/dev/null

 # Enclosure URLs resolve to the specific release's assets.
 DOWNLOAD_PREFIX="https://github.com/$RELEASE_REPO/releases/download/v$VERSION"
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,3 +1,5 @@
+import java.util.Properties
+
 plugins {
 	// this is necessary to avoid the plugins to be loaded multiple times
 	// in each subproject's classloader
@@ -13,3 +15,67 @@ plugins {
 	alias(libs.plugins.kotlinJvm) apply false
 	alias(libs.plugins.kotlinMultiplatform) apply false
 }
+
+val versionFile = layout.projectDirectory.file("version.properties")
+val versionProperties = Properties().apply {
+	versionFile.asFile.inputStream().use(::load)
+}
+
+fun requiredVersionProperty(name: String): String =
+	versionProperties.getProperty(name)?.takeIf { it.isNotBlank() }
+		?: error("Missing $name in ${versionFile.asFile}")
+
+fun canonicalInteger(name: String, value: String, range: LongRange): Long {
+	require(value.matches(Regex("0|[1-9][0-9]*"))) {
+		"$name must be a canonical non-negative integer"
+	}
+	val number = value.toLongOrNull()
+	require(number != null && number in range) {
+		"$name must be between ${range.first} and ${range.last}"
+	}
+	return number
+}
+
+val productVersion = requiredVersionProperty("PRODUCT_VERSION")
+val productVersionMatch = Regex("(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)")
+	.matchEntire(productVersion)
+	?: error("PRODUCT_VERSION must use canonical MAJOR.MINOR.PATCH integers")
+val productVersionParts = productVersionMatch.groupValues.drop(1).map(String::toLong)
+require(productVersionParts[0] <= 2099 && productVersionParts.drop(1).all { it <= 999 }) {
+	"PRODUCT_VERSION must use a major no greater than 2099 and minor/patch no greater than 999"
+}
+
+val releaseChannel = requiredVersionProperty("RELEASE_CHANNEL")
+require(releaseChannel.matches(Regex("[a-z][a-z0-9-]*"))) {
+	"RELEASE_CHANNEL contains unsupported characters"
+}
+val androidVersionCode =
+	(productVersionParts[0] * 1_000_000L + productVersionParts[1] * 1_000L + productVersionParts[2])
+		.also { require(it in 1L..2_100_000_000L) { "Derived Android version code is out of range" } }
+		.toInt()
+val windowsVersionEpoch = canonicalInteger(
+	"WINDOWS_VERSION_EPOCH",
+	requiredVersionProperty("WINDOWS_VERSION_EPOCH"),
+	1L..65535L,
+)
+val windowsMajor = productVersionParts[0] + windowsVersionEpoch
+require(windowsMajor <= 65535) {
+	"Derived Windows package major exceeds 65535"
+}
+val windowsPackageVersion =
+	"$windowsMajor.${productVersionParts[1]}.${productVersionParts[2]}.0"
+
+extra["vnidrop.productVersion"] = productVersion
+extra["vnidrop.releaseChannel"] = releaseChannel
+extra["vnidrop.androidVersionCode"] = androidVersionCode
+extra["vnidrop.windowsPackageVersion"] = windowsPackageVersion
+
+tasks.register("verifyVersion") {
+	group = "verification"
+	description = "Validates the canonical cross-platform application version."
+	inputs.file(versionFile)
+	inputs.property("productVersion", productVersion)
+	inputs.property("releaseChannel", releaseChannel)
+	inputs.property("androidVersionCode", androidVersionCode)
+	inputs.property("windowsPackageVersion", windowsPackageVersion)
+}
--- a/config.mk
+++ b/config.mk
@@ -1,5 +1,5 @@
-# Default command configuration. Override locally in the ignored
-# config.override.mk or on the command line (for example: make package-deb VERSION=1.2.0).
+# Default command configuration. Override local tool paths in the ignored
+# config.override.mk or on the command line.

 ifeq ($(OS),Windows_NT)
 HOST_OS := windows
@@ -24,7 +24,7 @@ XCODEGEN ?= xcodegen
 OPEN ?= open
 POWERSHELL ?= pwsh

-VERSION ?= $(shell sed -n 's/^vnidrop.version=//p' $(ROOT)/gradle.properties)
+override VERSION := $(shell $(ROOT)/packaging/version/resolve-version.sh product)
 APPLE_PROFILE ?= debug
 APPLE_CONFIGURATION ?= Debug
 APPLE_DESTINATION ?=
--- a/crates/vnidrop/build.rs
+++ b/crates/vnidrop/build.rs
@@ -0,0 +1,31 @@
+use std::{env, fs, path::PathBuf};
+
+fn main() {
+    let manifest_dir = PathBuf::from(env::var_os("CARGO_MANIFEST_DIR").unwrap());
+    let version_file = manifest_dir.join("../../version.properties");
+    println!("cargo:rerun-if-changed={}", version_file.display());
+
+    let contents = fs::read_to_string(&version_file)
+        .unwrap_or_else(|error| panic!("failed to read {}: {error}", version_file.display()));
+    let versions: Vec<_> = contents
+        .lines()
+        .filter_map(|line| line.strip_prefix("PRODUCT_VERSION="))
+        .collect();
+    assert_eq!(
+        versions.len(),
+        1,
+        "{} must contain exactly one PRODUCT_VERSION",
+        version_file.display()
+    );
+    let version = versions[0];
+    let components: Vec<_> = version.split('.').collect();
+    assert!(
+        components.len() == 3
+            && components.iter().all(|component| {
+                component.parse::<u16>().is_ok()
+                    && (component == &"0" || !component.starts_with('0'))
+            }),
+        "PRODUCT_VERSION must use canonical MAJOR.MINOR.PATCH integers"
+    );
+    println!("cargo:rustc-env=VNIDROP_PRODUCT_VERSION={version}");
+}
--- a/crates/vnidrop/src/handshake.rs
+++ b/crates/vnidrop/src/handshake.rs
@@ -106,7 +106,7 @@ impl HandshakeClient {
                transfer_name: metadata.transfer_name.clone(),
                receiver_name: receiver_name.map(ToOwned::to_owned),
                receiver_device_name: None,
-                app_version: env!("CARGO_PKG_VERSION").to_string(),
+                app_version: env!("VNIDROP_PRODUCT_VERSION").to_string(),
            })
            .await
    }
--- a/desktopApp/build.gradle.kts
+++ b/desktopApp/build.gradle.kts
@@ -6,19 +6,7 @@ plugins {
 	alias(libs.plugins.composeCompiler)
 }

-val appVersion = providers.gradleProperty("vnidrop.version").get()
-val appVersionParts = appVersion.split(".")
-require(
-	appVersionParts.size == 3 &&
-		appVersionParts.mapIndexed { index, part ->
-			val number = part.toIntOrNull()
-			number != null &&
-				number.toString() == part &&
-				number in (if (index == 0) 1 else 0)..65535
-		}.all { it },
-) {
-	"vnidrop.version must be MAJOR.MINOR.PATCH with numeric components from 0 to 65535 and a non-zero major"
-}
+val appVersion = rootProject.extra["vnidrop.productVersion"] as String

 dependencies {
 	implementation(projects.shared)
--- a/gradle.properties
+++ b/gradle.properties
@@ -6,10 +6,6 @@ org.gradle.jvmargs=-Xmx4096M -Dfile.encoding=UTF-8
 org.gradle.configuration-cache=true
 org.gradle.caching=true

-# Product version used by desktop packaging. Release workflows override this
-# from the vMAJOR.MINOR.PATCH tag.
-vnidrop.version=1.0.0
-
 #Android
 android.builtInKotlin=false
 android.newDsl=false
--- a/make/release.mk
+++ b/make/release.mk
@@ -1,11 +1,10 @@
 .PHONY: package-deb package-rpm package-msix

-package-deb: ## Build and verify a Debian x64 package (VERSION=x.y.z).
+package-deb: ## Build and verify a Debian x64 package.
 	@test "$(HOST_OS)" = linux || { printf 'Debian packaging requires Linux.\n' >&2; exit 1; }
 	@cd $(ROOT); \
-	version="$$(packaging/linux/resolve-version.sh "$(VERSION)")"; \
+	version="$$(packaging/linux/resolve-version.sh)"; \
 	$(GRADLE) :shared:jvmTest :desktopApp:packageReleaseDeb \
-		-Pvnidrop.version="$$version" \
 		-Pvnidrop.desktop.rustVariant=release \
 		-Pvnidrop.diagnostics.included=false \
 		$(GRADLE_RELEASE_FLAGS); \
@@ -19,12 +18,11 @@ package-deb: ## Build and verify a Debian x64 package (VERSION=x.y.z).
 	( cd "$$output_directory" && sha256sum "$$output_name" > "$$output_name.sha256" ); \
 	printf 'Package: %s/%s\n' "$$output_directory" "$$output_name"

-package-rpm: ## Build and verify an RPM x64 package (VERSION=x.y.z).
+package-rpm: ## Build and verify an RPM x64 package.
 	@test "$(HOST_OS)" = linux || { printf 'RPM packaging requires Linux.\n' >&2; exit 1; }
 	@cd $(ROOT); \
-	version="$$(packaging/linux/resolve-version.sh "$(VERSION)")"; \
+	version="$$(packaging/linux/resolve-version.sh)"; \
 	$(GRADLE) :desktopApp:packageReleaseRpm \
-		-Pvnidrop.version="$$version" \
 		-Pvnidrop.desktop.rustVariant=release \
 		-Pvnidrop.diagnostics.included=false \
 		$(GRADLE_RELEASE_FLAGS); \
@@ -38,14 +36,12 @@ package-rpm: ## Build and verify an RPM x64 package (VERSION=x.y.z).
 	( cd "$$output_directory" && sha256sum "$$output_name" > "$$output_name.sha256" ); \
 	printf 'Package: %s/%s\n' "$$output_directory" "$$output_name"

-package-msix: ## Build and verify an unsigned Windows Store MSIX (VERSION=x.y.z).
+package-msix: ## Build and verify an unsigned Windows Store MSIX.
 	@test "$(HOST_OS)" = windows || { printf 'MSIX packaging requires Windows.\n' >&2; exit 1; }
 	cd $(ROOT) && $(GRADLE) :shared:jvmTest :desktopApp:createReleaseDistributable \
-		-Pvnidrop.version="$(VERSION)" \
 		-Pvnidrop.desktop.rustVariant=release \
 		-Pvnidrop.diagnostics.included=false \
 		$(GRADLE_RELEASE_FLAGS)
 	cd $(ROOT) && $(POWERSHELL) -NoProfile -File packaging/windows/build-msix.ps1 \
-		-Version "$(VERSION)" \
 		-AppImage desktopApp/build/compose/binaries/main-release/app/VniDrop \
 		-OutputDirectory build/release/windows
--- a/packaging/android/README.md
+++ b/packaging/android/README.md
@@ -0,0 +1,54 @@
+# Android release pipeline
+
+Android releases use two independent credentials:
+
+- the upload keystore signs the APK and AAB;
+- a short-lived Google access token publishes the AAB through the Play
+  Developer API.
+
+The GitHub release workflow expects these encrypted secrets:
+
+- `ANDROID_UPLOAD_KEYSTORE_BASE64`
+- `ANDROID_UPLOAD_KEYSTORE_PASSWORD`
+- `ANDROID_UPLOAD_KEY_ALIAS`
+- `ANDROID_UPLOAD_KEY_PASSWORD`
+
+It also expects this repository variable:
+
+- `ANDROID_UPLOAD_CERT_SHA256`
+
+The protected `play-closed-testing` GitHub Environment supplies:
+
+- `PLAY_APP_SIGNING_CERT_SHA256`
+- `GCP_WORKLOAD_IDENTITY_PROVIDER`
+- `GCP_PLAY_SERVICE_ACCOUNT`
+- `PLAY_PACKAGE_NAME` (`com.vnidrop.app`)
+- `PLAY_CLOSED_TRACK` (the existing closed-test track identifier)
+
+The upload and app-signing certificate fingerprints are public identifiers from
+Play Console's App signing page. Do not store a private key in a repository
+variable.
+
+`packaging/android/build-release.sh` creates an upload-signed AAB and APK,
+verifies their canonical version and upload certificate, and writes checksums.
+The release workflow uploads only the AAB to Play. It then downloads the
+universal APK generated and signed by Play for the public GitHub Release.
+
+Play publishing is deliberately restricted to `draft` releases on
+`PLAY_CLOSED_TRACK`. Production promotion is not part of this pipeline.
+
+## One-time setup
+
+1. In Play Console, link a Google Cloud project and grant the deployment
+   service account permission to manage releases for VniDrop.
+2. In Google Cloud, enable the Google Play Android Developer API and configure
+   a Workload Identity Federation provider that trusts this repository's
+   GitHub Actions identity. Permit the service account to receive federated
+   tokens from that provider.
+3. Create the `play-closed-testing` GitHub Environment. Add the five variables
+   listed above and restrict deployment branches/tags to the release policy.
+4. Add the four upload-keystore secrets and
+   `ANDROID_UPLOAD_CERT_SHA256` in the repository settings.
+
+No Google service-account JSON key is stored in GitHub. The workflow exchanges
+GitHub's OIDC identity for a short-lived Google access token.
--- a/packaging/android/build-release.sh
+++ b/packaging/android/build-release.sh
@@ -0,0 +1,145 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+repo_root="$(cd "$script_dir/../.." && pwd)"
+resolver="$repo_root/packaging/version/resolve-version.sh"
+output_dir="$repo_root/build/release/android"
+required_apk_libraries=(
+	"lib/arm64-v8a/libvnidrop.so"
+	"lib/x86_64/libvnidrop.so"
+)
+required_aab_libraries=(
+	"base/lib/arm64-v8a/libvnidrop.so"
+	"base/lib/x86_64/libvnidrop.so"
+)
+
+require_environment() {
+	local name=$1
+	[[ -n ${!name:-} ]] || {
+		printf 'Missing required environment variable: %s\n' "$name" >&2
+		exit 1
+	}
+}
+
+normalize_fingerprint() {
+	printf '%s' "$1" | tr -d '[:space:]:' | tr '[:upper:]' '[:lower:]'
+}
+
+sha256_file() {
+	if command -v sha256sum >/dev/null 2>&1; then
+		sha256sum "$1" | awk '{print $1}'
+	else
+		shasum -a 256 "$1" | awk '{print $1}'
+	fi
+}
+
+verify_archive_entries() {
+	local archive=$1
+	shift
+	local entry
+	local size
+	for entry in "$@"; do
+		size="$(
+			unzip -l "$archive" "$entry" |
+				awk -v expected="$entry" '$4 == expected {print $1; exit}'
+		)"
+		[[ -n $size && $size -gt 0 ]] || {
+			printf 'Missing or empty Android native library %s in %s\n' \
+				"$entry" "$archive" >&2
+			exit 1
+		}
+	done
+}
+
+for name in \
+	VNIDROP_ANDROID_KEYSTORE_PATH \
+	VNIDROP_ANDROID_KEYSTORE_PASSWORD \
+	VNIDROP_ANDROID_KEY_ALIAS \
+	VNIDROP_ANDROID_KEY_PASSWORD \
+	VNIDROP_ANDROID_UPLOAD_CERT_SHA256; do
+	require_environment "$name"
+done
+
+[[ -r $VNIDROP_ANDROID_KEYSTORE_PATH ]] || {
+	printf 'Android upload keystore is not readable: %s\n' "$VNIDROP_ANDROID_KEYSTORE_PATH" >&2
+	exit 1
+}
+
+version="$("$resolver" product)"
+version_code="$("$resolver" android-code)"
+"$resolver" verify >/dev/null
+
+cd "$repo_root"
+./gradlew \
+	:androidApp:check \
+	:androidApp:assembleRelease \
+	:androidApp:bundleRelease \
+	-Pvnidrop.diagnostics.included=false \
+	--no-daemon \
+	--no-configuration-cache \
+	--stacktrace
+
+source_apk="$repo_root/androidApp/build/outputs/apk/release/androidApp-release.apk"
+source_aab="$repo_root/androidApp/build/outputs/bundle/release/androidApp-release.aab"
+metadata="$repo_root/androidApp/build/intermediates/merged_manifests/release/processReleaseManifest/output-metadata.json"
+[[ -s $source_apk && -s $source_aab && -s $metadata ]] || {
+	printf 'Android release outputs are missing or empty\n' >&2
+	exit 1
+}
+
+actual_version="$(jq -r '.elements[0].versionName' "$metadata")"
+actual_version_code="$(jq -r '.elements[0].versionCode' "$metadata")"
+[[ $actual_version == "$version" && $actual_version_code == "$version_code" ]] || {
+	printf 'Android artifact version mismatch: expected %s (%s), got %s (%s)\n' \
+		"$version" "$version_code" "$actual_version" "$actual_version_code" >&2
+	exit 1
+}
+
+jarsigner_report="$(jarsigner -verify "$source_aab" 2>&1)" || {
+	printf 'AAB signature verification failed:\n%s\n' "$jarsigner_report" >&2
+	exit 1
+}
+grep -F 'jar verified.' <<< "$jarsigner_report" >/dev/null || {
+	printf 'jarsigner did not confirm the AAB signature\n' >&2
+	exit 1
+}
+verify_archive_entries "$source_apk" "${required_apk_libraries[@]}"
+verify_archive_entries "$source_aab" "${required_aab_libraries[@]}"
+actual_fingerprint="$(
+	"$script_dir/verify-apk-signature.sh" \
+		"$source_apk" \
+		"$VNIDROP_ANDROID_UPLOAD_CERT_SHA256"
+)"
+expected_fingerprint="$(normalize_fingerprint "$VNIDROP_ANDROID_UPLOAD_CERT_SHA256")"
+aab_fingerprint="$(
+	keytool -printcert -jarfile "$source_aab" |
+		awk -F': ' '/SHA256:/ {print $2; exit}'
+)"
+aab_fingerprint="$(normalize_fingerprint "$aab_fingerprint")"
+[[ $aab_fingerprint == "$expected_fingerprint" ]] || {
+	printf 'AAB signing certificate mismatch: expected %s, got %s\n' \
+		"$expected_fingerprint" "$aab_fingerprint" >&2
+	exit 1
+}
+
+mkdir -p "$output_dir"
+rm -f \
+	"$output_dir"/VniDrop-*-upload-signed.apk \
+	"$output_dir"/VniDrop-*.aab \
+	"$output_dir"/SHA256SUMS
+apk_name="VniDrop-${version}-${version_code}-upload-signed.apk"
+aab_name="VniDrop-${version}-${version_code}.aab"
+cp "$source_apk" "$output_dir/$apk_name"
+cp "$source_aab" "$output_dir/$aab_name"
+
+{
+	printf '%s  %s\n' "$(sha256_file "$output_dir/$apk_name")" "$apk_name"
+	printf '%s  %s\n' "$(sha256_file "$output_dir/$aab_name")" "$aab_name"
+} > "$output_dir/SHA256SUMS"
+
+printf 'Created signed Android release artifacts:\n'
+printf '  %s\n' "$output_dir/$aab_name"
+printf '  %s\n' "$output_dir/$apk_name"
+printf '  upload certificate SHA-256: %s\n' "$actual_fingerprint"
--- a/packaging/android/publish_play.py
+++ b/packaging/android/publish_play.py
@@ -0,0 +1,410 @@
+#!/usr/bin/env python3
+
+from __future__ import annotations
+
+import argparse
+import hashlib
+import json
+import os
+import sys
+import time
+import urllib.error
+import urllib.parse
+import urllib.request
+from pathlib import Path
+from typing import Any
+
+
+API_ROOT = "https://androidpublisher.googleapis.com/androidpublisher/v3"
+UPLOAD_ROOT = "https://androidpublisher.googleapis.com/upload/androidpublisher/v3"
+RETRYABLE_STATUS = {429, 500, 502, 503, 504}
+
+
+class PlayApiError(RuntimeError):
+    def __init__(self, status: int | None, message: str) -> None:
+        super().__init__(message)
+        self.status = status
+
+
+class PlayClient:
+    def __init__(self, token: str) -> None:
+        if not token:
+            raise ValueError("Google Play access token is required")
+        self.token = token
+
+    def request(
+        self,
+        method: str,
+        url: str,
+        *,
+        body: bytes | None = None,
+        content_type: str | None = None,
+        timeout: int = 180,
+        attempts: int = 5,
+    ) -> bytes:
+        headers = {
+            "Authorization": f"Bearer {self.token}",
+            "Accept": "application/json",
+        }
+        if content_type is not None:
+            headers["Content-Type"] = content_type
+
+        for attempt in range(1, attempts + 1):
+            request = urllib.request.Request(
+                url,
+                data=body,
+                headers=headers,
+                method=method,
+            )
+            try:
+                with urllib.request.urlopen(request, timeout=timeout) as response:
+                    return response.read()
+            except urllib.error.HTTPError as error:
+                error_body = error.read().decode("utf-8", errors="replace")
+                if error.code not in RETRYABLE_STATUS or attempt == attempts:
+                    raise PlayApiError(
+                        error.code,
+                        f"Google Play API returned HTTP {error.code}: {error_body}",
+                    ) from error
+            except urllib.error.URLError as error:
+                if attempt == attempts:
+                    raise PlayApiError(
+                        None,
+                        f"Google Play API request failed: {error.reason}",
+                    ) from error
+            time.sleep(2 ** (attempt - 1))
+        raise AssertionError("request retry loop exited unexpectedly")
+
+    def request_json(
+        self,
+        method: str,
+        url: str,
+        *,
+        value: Any | None = None,
+        timeout: int = 180,
+    ) -> dict[str, Any]:
+        body = None
+        content_type = None
+        if value is not None:
+            body = json.dumps(value, separators=(",", ":")).encode()
+            content_type = "application/json"
+        response = self.request(
+            method,
+            url,
+            body=body,
+            content_type=content_type,
+            timeout=timeout,
+        )
+        return json.loads(response) if response else {}
+
+
+def normalize_fingerprint(value: str) -> str:
+    return "".join(character for character in value.lower() if character.isalnum())
+
+
+def validate_closed_track(track: str) -> None:
+    normalized = track.strip().casefold()
+    if not normalized:
+        raise ValueError("Play track is required")
+    if normalized == "production" or normalized.endswith(":production"):
+        raise ValueError(
+            "production tracks are forbidden by this closed-testing pipeline"
+        )
+
+
+def find_universal_apk(
+    response: dict[str, Any],
+    expected_fingerprint: str,
+) -> tuple[str, str] | None:
+    expected = normalize_fingerprint(expected_fingerprint)
+    for signing_key in response.get("generatedApks", []):
+        fingerprint = normalize_fingerprint(
+            str(signing_key.get("certificateSha256Hash", ""))
+        )
+        if fingerprint != expected:
+            continue
+        universal = signing_key.get("generatedUniversalApk") or {}
+        download_id = universal.get("downloadId")
+        if download_id:
+            return fingerprint, str(download_id)
+    return None
+
+
+def build_track_payload(
+    track: dict[str, Any],
+    version_code: int,
+    release_name: str,
+) -> dict[str, Any]:
+    releases = list(track.get("releases") or [])
+    expected_code = str(version_code)
+    if any(
+        expected_code in [str(code) for code in release.get("versionCodes", [])]
+        for release in releases
+    ):
+        raise ValueError(
+            f"version code {version_code} is already present in track "
+            f"{track.get('track', '<unknown>')}"
+        )
+    releases.append(
+        {
+            "name": release_name,
+            "versionCodes": [expected_code],
+            "status": "draft",
+        }
+    )
+    return {"track": track["track"], "releases": releases}
+
+
+def find_track_release(
+    track: dict[str, Any],
+    version_code: int,
+) -> dict[str, Any] | None:
+    expected_code = str(version_code)
+    return next(
+        (
+            release
+            for release in track.get("releases") or []
+            if expected_code
+            in [str(code) for code in release.get("versionCodes", [])]
+        ),
+        None,
+    )
+
+
+def sha256_file(path: Path) -> str:
+    digest = hashlib.sha256()
+    with path.open("rb") as source:
+        for chunk in iter(lambda: source.read(1024 * 1024), b""):
+            digest.update(chunk)
+    return digest.hexdigest()
+
+
+def generated_apks_url(package_name: str, version_code: int) -> str:
+    package = urllib.parse.quote(package_name, safe="")
+    return f"{API_ROOT}/applications/{package}/generatedApks/{version_code}"
+
+
+def get_generated_apks(
+    client: PlayClient,
+    package_name: str,
+    version_code: int,
+) -> dict[str, Any] | None:
+    try:
+        return client.request_json(
+            "GET",
+            generated_apks_url(package_name, version_code),
+        )
+    except PlayApiError as error:
+        if error.status == 404:
+            return None
+        raise
+
+
+def download_universal_apk(
+    client: PlayClient,
+    package_name: str,
+    version_code: int,
+    expected_fingerprint: str,
+    output: Path,
+    *,
+    attempts: int,
+    interval_seconds: int,
+) -> str:
+    for attempt in range(1, attempts + 1):
+        response = get_generated_apks(client, package_name, version_code)
+        if response is not None:
+            selected = find_universal_apk(response, expected_fingerprint)
+            if selected is not None:
+                fingerprint, download_id = selected
+                package = urllib.parse.quote(package_name, safe="")
+                download = urllib.parse.quote(download_id, safe="")
+                url = (
+                    f"{API_ROOT}/applications/{package}/generatedApks/"
+                    f"{version_code}/downloads/{download}:download"
+                )
+                output.parent.mkdir(parents=True, exist_ok=True)
+                output.write_bytes(client.request("GET", url))
+                if output.stat().st_size == 0:
+                    raise RuntimeError("Google Play returned an empty universal APK")
+                return fingerprint
+        if attempt < attempts:
+            time.sleep(interval_seconds)
+    raise RuntimeError(
+        "Google Play did not provide a universal APK signed with the expected "
+        f"certificate after {attempts} attempts"
+    )
+
+
+def publish_bundle(args: argparse.Namespace) -> dict[str, Any]:
+    validate_closed_track(args.track)
+    if args.version_code < 1:
+        raise ValueError("version code must be positive")
+    if not args.bundle.is_file() or args.bundle.stat().st_size == 0:
+        raise ValueError(f"AAB is missing or empty: {args.bundle}")
+
+    client = PlayClient(args.access_token)
+    existing = get_generated_apks(client, args.package_name, args.version_code)
+    if existing is not None:
+        selected = find_universal_apk(existing, args.expected_app_certificate)
+        if selected is None:
+            raise RuntimeError(
+                "version code already exists in Play, but no universal APK matches "
+                "the expected app-signing certificate"
+            )
+        package = urllib.parse.quote(args.package_name, safe="")
+        edit = client.request_json(
+            "POST",
+            f"{API_ROOT}/applications/{package}/edits",
+            value={},
+        )
+        edit_id = str(edit["id"])
+        edit_base = f"{API_ROOT}/applications/{package}/edits/{edit_id}"
+        try:
+            track_id = urllib.parse.quote(args.track, safe="")
+            track = client.request_json(
+                "GET",
+                f"{edit_base}/tracks/{track_id}",
+            )
+            release = find_track_release(track, args.version_code)
+            if release is None or release.get("status") != "draft":
+                raise RuntimeError(
+                    "version code already exists in Play but is not a draft on "
+                    f"the configured track {args.track}"
+                )
+        finally:
+            try:
+                client.request("DELETE", edit_base, attempts=1)
+            except PlayApiError:
+                pass
+        source = "existing"
+    else:
+        package = urllib.parse.quote(args.package_name, safe="")
+        edit = client.request_json(
+            "POST",
+            f"{API_ROOT}/applications/{package}/edits",
+            value={},
+        )
+        edit_id = str(edit["id"])
+        committed = False
+        edit_base = f"{API_ROOT}/applications/{package}/edits/{edit_id}"
+        try:
+            upload_url = (
+                f"{UPLOAD_ROOT}/applications/{package}/edits/{edit_id}/bundles"
+                "?uploadType=media"
+            )
+            try:
+                uploaded = json.loads(
+                    client.request(
+                        "POST",
+                        upload_url,
+                        body=args.bundle.read_bytes(),
+                        content_type="application/octet-stream",
+                        attempts=1,
+                    )
+                )
+            except PlayApiError:
+                bundles = client.request_json("GET", f"{edit_base}/bundles")
+                matches = [
+                    bundle
+                    for bundle in bundles.get("bundles", [])
+                    if int(bundle.get("versionCode", 0)) == args.version_code
+                ]
+                if len(matches) != 1:
+                    raise
+                uploaded = matches[0]
+
+            uploaded_code = int(uploaded["versionCode"])
+            if uploaded_code != args.version_code:
+                raise RuntimeError(
+                    f"Play accepted version code {uploaded_code}, expected "
+                    f"{args.version_code}"
+                )
+
+            track_id = urllib.parse.quote(args.track, safe="")
+            track_url = f"{edit_base}/tracks/{track_id}"
+            track = client.request_json("GET", track_url)
+            payload = build_track_payload(track, args.version_code, args.release_name)
+            client.request_json("PUT", track_url, value=payload)
+            commit_url = (
+                f"{edit_base}:commit"
+                "?changesInReviewBehavior=ERROR_IF_IN_REVIEW"
+            )
+            client.request("POST", commit_url, body=b"")
+            committed = True
+            source = "uploaded"
+        finally:
+            if not committed:
+                try:
+                    client.request("DELETE", edit_base, attempts=1)
+                except PlayApiError:
+                    pass
+
+    fingerprint = download_universal_apk(
+        client,
+        args.package_name,
+        args.version_code,
+        args.expected_app_certificate,
+        args.apk_output,
+        attempts=args.poll_attempts,
+        interval_seconds=args.poll_interval,
+    )
+    return {
+        "packageName": args.package_name,
+        "track": args.track,
+        "releaseStatus": "draft",
+        "releaseName": args.release_name,
+        "versionCode": args.version_code,
+        "bundleSha256": sha256_file(args.bundle),
+        "universalApk": args.apk_output.name,
+        "universalApkSha256": sha256_file(args.apk_output),
+        "appSigningCertificateSha256": fingerprint,
+        "source": source,
+    }
+
+
+def parse_args() -> argparse.Namespace:
+    parser = argparse.ArgumentParser(
+        description=(
+            "Stage a signed AAB on a closed Play track and download Play's "
+            "app-signed universal APK"
+        )
+    )
+    parser.add_argument(
+        "--access-token",
+        default=os.environ.get("GOOGLE_PLAY_ACCESS_TOKEN"),
+    )
+    parser.add_argument("--bundle", type=Path, required=True)
+    parser.add_argument("--package-name", required=True)
+    parser.add_argument("--track", required=True)
+    parser.add_argument("--version-code", type=int, required=True)
+    parser.add_argument("--release-name", required=True)
+    parser.add_argument("--expected-app-certificate", required=True)
+    parser.add_argument("--apk-output", type=Path, required=True)
+    parser.add_argument("--metadata-output", type=Path, required=True)
+    parser.add_argument("--poll-attempts", type=int, default=18)
+    parser.add_argument("--poll-interval", type=int, default=10)
+    return parser.parse_args()
+
+
+def main() -> int:
+    args = parse_args()
+    try:
+        metadata = publish_bundle(args)
+    except (KeyError, ValueError, RuntimeError, PlayApiError) as error:
+        print(f"Play closed-testing publication failed: {error}", file=sys.stderr)
+        return 1
+    args.metadata_output.parent.mkdir(parents=True, exist_ok=True)
+    args.metadata_output.write_text(
+        json.dumps(metadata, indent=2, sort_keys=True) + "\n",
+        encoding="utf-8",
+    )
+    print(
+        f"Staged {args.release_name} ({args.version_code}) as a draft on "
+        f"{args.track}"
+    )
+    print(f"Downloaded Play-signed APK: {args.apk_output}")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
--- a/packaging/android/tests/test_publish_play.py
+++ b/packaging/android/tests/test_publish_play.py
@@ -0,0 +1,100 @@
+import importlib.util
+import unittest
+from pathlib import Path
+
+
+SCRIPT = Path(__file__).parents[1] / "publish_play.py"
+SPEC = importlib.util.spec_from_file_location("publish_play", SCRIPT)
+assert SPEC is not None and SPEC.loader is not None
+publish_play = importlib.util.module_from_spec(SPEC)
+SPEC.loader.exec_module(publish_play)
+
+
+class PublishPlayTests(unittest.TestCase):
+    def test_rejects_phone_and_form_factor_production_tracks(self):
+        for track in ("production", "wear:production", " Production "):
+            with self.subTest(track=track):
+                with self.assertRaisesRegex(ValueError, "production"):
+                    publish_play.validate_closed_track(track)
+
+    def test_accepts_custom_closed_track(self):
+        publish_play.validate_closed_track("closed-beta")
+
+    def test_normalizes_certificate_fingerprint(self):
+        self.assertEqual(
+            publish_play.normalize_fingerprint("AA:bb 01"),
+            "aabb01",
+        )
+
+    def test_selects_universal_apk_for_expected_signing_key(self):
+        response = {
+            "generatedApks": [
+                {
+                    "certificateSha256Hash": "11:22",
+                    "generatedUniversalApk": {"downloadId": "wrong"},
+                },
+                {
+                    "certificateSha256Hash": "AA:BB",
+                    "generatedUniversalApk": {"downloadId": "correct"},
+                },
+            ]
+        }
+        self.assertEqual(
+            publish_play.find_universal_apk(response, "aa:bb"),
+            ("aabb", "correct"),
+        )
+
+    def test_track_update_preserves_existing_releases_and_adds_draft(self):
+        track = {
+            "track": "closed-beta",
+            "releases": [
+                {
+                    "name": "0.1.0",
+                    "versionCodes": ["1"],
+                    "status": "completed",
+                }
+            ],
+        }
+        updated = publish_play.build_track_payload(track, 2, "0.2.0")
+        self.assertEqual(updated["releases"][0], track["releases"][0])
+        self.assertEqual(
+            updated["releases"][1],
+            {
+                "name": "0.2.0",
+                "versionCodes": ["2"],
+                "status": "draft",
+            },
+        )
+
+    def test_track_update_rejects_duplicate_version_code(self):
+        track = {
+            "track": "closed-beta",
+            "releases": [{"versionCodes": ["2"], "status": "draft"}],
+        }
+        with self.assertRaisesRegex(ValueError, "already present"):
+            publish_play.build_track_payload(track, 2, "0.2.0")
+
+    def test_finds_existing_release_by_version_code(self):
+        expected = {"versionCodes": ["2"], "status": "draft"}
+        track = {
+            "track": "closed-beta",
+            "releases": [
+                {"versionCodes": ["1"], "status": "completed"},
+                expected,
+            ],
+        }
+        self.assertIs(
+            publish_play.find_track_release(track, 2),
+            expected,
+        )
+
+    def test_returns_none_when_version_is_not_on_track(self):
+        track = {
+            "track": "closed-beta",
+            "releases": [{"versionCodes": ["1"], "status": "completed"}],
+        }
+        self.assertIsNone(publish_play.find_track_release(track, 2))
+
+
+if __name__ == "__main__":
+    unittest.main()
--- a/packaging/android/tests/test_verify_apk_signature.sh
+++ b/packaging/android/tests/test_verify_apk_signature.sh
@@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+verifier="$script_dir/../verify-apk-signature.sh"
+scratch="$(mktemp -d "${TMPDIR:-/tmp}/vnidrop-apksigner-test.XXXXXX")"
+trap 'rm -rf "$scratch"' EXIT
+
+apk="$scratch/app.apk"
+fake_apksigner="$scratch/apksigner"
+printf 'apk\n' > "$apk"
+
+cat > "$fake_apksigner" <<'SCRIPT'
+#!/usr/bin/env bash
+case "${FAKE_APKSIGNER_MODE:-success}" in
+	success)
+		printf '%s\n' \
+			'Verifies' \
+			'Signer #1 certificate SHA-256 digest: AA:BB:CC:DD' >&2
+		;;
+	missing)
+		printf '%s\n' 'Verifies' >&2
+		;;
+	failure)
+		printf '%s\n' 'invalid APK signature' >&2
+		exit 1
+		;;
+esac
+SCRIPT
+chmod +x "$fake_apksigner"
+
+actual="$(
+	APKSIGNER="$fake_apksigner" \
+		"$verifier" "$apk" "aa bb cc dd"
+)"
+[[ $actual == aabbccdd ]]
+
+if APKSIGNER="$fake_apksigner" \
+	"$verifier" "$apk" deadbeef >/dev/null 2>&1; then
+	printf 'Expected a certificate mismatch to fail\n' >&2
+	exit 1
+fi
+
+if FAKE_APKSIGNER_MODE=missing APKSIGNER="$fake_apksigner" \
+	"$verifier" "$apk" aabbccdd >/dev/null 2>&1; then
+	printf 'Expected missing certificate output to fail\n' >&2
+	exit 1
+fi
+
+if FAKE_APKSIGNER_MODE=failure APKSIGNER="$fake_apksigner" \
+	"$verifier" "$apk" aabbccdd >/dev/null 2>&1; then
+	printf 'Expected signature verification failure to propagate\n' >&2
+	exit 1
+fi
+
+printf 'APK signature verifier tests passed.\n'
--- a/packaging/android/verify-apk-signature.sh
+++ b/packaging/android/verify-apk-signature.sh
@@ -0,0 +1,86 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+if [[ $# -ne 2 ]]; then
+	printf 'Usage: %s <apk> <expected-certificate-sha256>\n' "$0" >&2
+	exit 2
+fi
+
+apk=$1
+expected_fingerprint=$2
+build_tools_version=${ANDROID_BUILD_TOOLS_VERSION:-36.0.0}
+
+normalize_fingerprint() {
+	printf '%s' "$1" |
+		tr -d '[:space:]:' |
+		tr '[:upper:]' '[:lower:]'
+}
+
+find_apksigner() {
+	if [[ -n ${APKSIGNER:-} ]]; then
+		[[ -x $APKSIGNER ]] || {
+			printf 'Configured apksigner is not executable: %s\n' "$APKSIGNER" >&2
+			return 1
+		}
+		printf '%s\n' "$APKSIGNER"
+		return
+	fi
+
+	local sdk_root=${ANDROID_SDK_ROOT:-${ANDROID_HOME:-}}
+	if [[ -n $sdk_root ]]; then
+		local pinned="$sdk_root/build-tools/$build_tools_version/apksigner"
+		if [[ -x $pinned ]]; then
+			printf '%s\n' "$pinned"
+			return
+		fi
+	fi
+
+	if command -v apksigner >/dev/null 2>&1; then
+		command -v apksigner
+		return
+	fi
+
+	printf 'apksigner %s was not found in the Android SDK or PATH\n' \
+		"$build_tools_version" >&2
+	return 1
+}
+
+[[ -s $apk ]] || {
+	printf 'APK is missing or empty: %s\n' "$apk" >&2
+	exit 1
+}
+
+apksigner_path="$(find_apksigner)" || exit 1
+if ! signature_report="$(
+	"$apksigner_path" verify --verbose --print-certs "$apk" 2>&1
+)"; then
+	printf 'APK signature verification failed:\n%s\n' "$signature_report" >&2
+	exit 1
+fi
+
+actual_fingerprint="$(
+	printf '%s\n' "$signature_report" |
+		awk '
+			tolower($0) ~ /^signer #1 certificate sha-256 digest:[[:space:]]*/ {
+				line = $0
+				sub(/^[^:]*:[[:space:]]*/, "", line)
+				print line
+				exit
+			}
+		'
+)"
+[[ -n $actual_fingerprint ]] || {
+	printf 'Could not read the APK signing certificate fingerprint\n' >&2
+	exit 1
+}
+
+actual_fingerprint="$(normalize_fingerprint "$actual_fingerprint")"
+expected_fingerprint="$(normalize_fingerprint "$expected_fingerprint")"
+[[ $actual_fingerprint == "$expected_fingerprint" ]] || {
+	printf 'APK signing certificate mismatch: expected %s, got %s\n' \
+		"$expected_fingerprint" "$actual_fingerprint" >&2
+	exit 1
+}
+
+printf '%s\n' "$actual_fingerprint"
--- a/packaging/linux/README.md
+++ b/packaging/linux/README.md
@@ -13,9 +13,10 @@ repository should add repository metadata signing and its own update channel.

 ## GitHub Actions

-The Linux packages workflow runs for relevant pull requests, release tags
-matching `vMAJOR.MINOR.PATCH`, and manual dispatches. Each native package is
-built and validated on its matching distribution family:
+The Linux packages workflow runs for relevant pull requests and manual
+dispatches. The coordinated release workflow also calls it for a canonical
+`vMAJOR.MINOR.PATCH` tag. Each native package is built and validated on its
+matching distribution family:

 - `.deb` on Ubuntu 22.04 for a conservative glibc baseline
 - `.rpm` inside Fedora 43 so `jpackage` can discover normal RPM dependencies
@@ -23,13 +24,12 @@ built and validated on its matching distribution family:
 The shared JVM suite runs inside the Debian build job. Package construction and
 payload validation happen in both build jobs, so there is no separate test
 runner. Pull requests build and verify both packages but do not retain
-artifacts. Manual runs retain build artifacts for 14 days. A pushed version tag
-whose commit is on `master` creates the matching GitHub Release with the `.deb`,
-`.rpm`, and a combined `SHA256SUMS`.
+artifacts. Manual and coordinated-release runs retain build artifacts. The
+central release workflow creates the single GitHub Release only after every
+platform build and Play closed-testing stage succeeds.

-The existing `v1.0.0` tag predates this workflow and will not run it
-retroactively. Use the next version tag after this configuration reaches
-`master`.
+The legacy `v1.0.0` tag predates canonical versioning and does not define the
+current product version. New release tags must match `version.properties`.

 ## Install a downloaded package

@@ -61,11 +61,12 @@ Use JDK 21 and Rust 1.91. Build DEB packages on Debian/Ubuntu with `dpkg` and
 `fakeroot`; build RPM packages on Fedora with `rpm-build`. Building an RPM on
 Ubuntu prevents `jpackage` from discovering normal RPM dependencies.

-From the repository root on the matching Linux family, run one of:
+Set the release in `version.properties`. From the repository root on the
+matching Linux family, run one of:

 ```bash
-make package-deb VERSION=1.0.0
-make package-rpm VERSION=1.0.0
+make package-deb
+make package-rpm
 ```

 The Make targets collect the Compose output under `build/release/linux/`, then
--- a/packaging/linux/resolve-version.sh
+++ b/packaging/linux/resolve-version.sh
@@ -2,38 +2,14 @@

 set -euo pipefail

-version=${1:-1.0.0}
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+resolver="$script_dir/../version/resolve-version.sh"
+version="$("$resolver" product)"
+"$resolver" verify >/dev/null

-if [[ ${GITHUB_REF_TYPE:-} == "tag" ]]; then
-	if [[ ! ${GITHUB_REF_NAME:-} =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
-		echo "Linux release tags must use vMAJOR.MINOR.PATCH" >&2
+if [[ -n ${1:-} && $1 != "$version" ]]; then
+	printf 'Version overrides are not supported; version.properties declares %s\n' "$version" >&2
 	exit 1
 fi
-	version=${GITHUB_REF_NAME#v}
-fi
-
-if [[ ! $version =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
-	echo "Version must use MAJOR.MINOR.PATCH" >&2
-	exit 1
-fi
-
-IFS=. read -r major minor patch <<< "$version"
-parts=("$major" "$minor" "$patch")
-
-for index in "${!parts[@]}"; do
-	part=${parts[$index]}
-	if [[ $part != "0" && $part == 0* ]]; then
-		echo "Version components must be canonical integers without leading zeroes" >&2
-		exit 1
-	fi
-	if (( ${#part} > 5 )) || (( 10#$part > 65535 )); then
-		echo "Version components must be between 0 and 65535" >&2
-		exit 1
-	fi
-	if (( index == 0 && 10#$part == 0 )); then
-		echo "The major version must be non-zero" >&2
-		exit 1
-	fi
-done

 printf '%s\n' "$version"
--- a/packaging/release/README.md
+++ b/packaging/release/README.md
@@ -0,0 +1,52 @@
+# Coordinated releases
+
+Only `.github/workflows/release.yml` responds to version tags. It verifies that
+the tag matches `version.properties` and points at the current `master`, then
+calls the native platform workflows in parallel.
+
+The tag workflow runs only when the repository variable
+`RELEASE_PIPELINE_ENABLED` is exactly `true`. Leave it unset or set it to
+`false` to disable all coordinated releases, including Play uploads, without
+disabling release validation on pull requests.
+
+Platform workflows upload private workflow artifacts. After every native build
+passes, the release pipeline:
+
+1. stages the signed AAB as a draft on the configured Play closed-test track;
+2. submits the unsigned `.msixupload` package to Microsoft Store certification;
+3. downloads the universal APK signed by Play;
+4. verifies and assembles the public artifacts;
+5. generates checksums and GitHub build-provenance attestations;
+6. creates exactly one GitHub Release;
+7. updates the Homebrew cask.
+
+Public GitHub Release assets are the DEB, RPM, notarized DMG, Sparkle appcast,
+Play-signed universal APK, checksum file, and release manifest.
+
+The unsigned Microsoft `.msixupload` and upload-signed Android AAB remain
+private workflow artifacts. The protected `microsoft-store` GitHub Environment
+supplies the Partner Center credentials and Store product ID used to submit the
+Windows package. Microsoft publishes the update after certification; the job
+does not change Store listings, pricing, or availability. The Play release
+remains a draft on a closed-testing track; this pipeline cannot publish it to
+production.
+
+To release, prepare and merge the new product version. Android, Microsoft Store,
+and Apple build/package versions are derived automatically:
+
+```bash
+make prepare-release RELEASE_VERSION=0.2.1
+make check-version
+```
+
+Then create and push the matching tag:
+
+```bash
+git tag -s v0.2.1 -m "VniDrop 0.2.1"
+git push origin v0.2.1
+```
+
+The tag must point at the current `origin/master` commit. A failed run creates
+no GitHub Release; a rerun safely reuses an already-staged Play draft only when
+the version, configured track, draft status, and app-signing certificate all
+match.
--- a/packaging/release/assemble-release.sh
+++ b/packaging/release/assemble-release.sh
@@ -0,0 +1,177 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+repo_root="$(cd "$script_dir/../.." && pwd)"
+resolver="$repo_root/packaging/version/resolve-version.sh"
+input_dir="${VNIDROP_RELEASE_INPUT_DIR:-$repo_root/build/release/downloads}"
+output_dir="${VNIDROP_RELEASE_OUTPUT_DIR:-$repo_root/build/release/final}"
+source_commit="${GITHUB_SHA:-local}"
+source_tag="${GITHUB_REF_NAME:-v$("$resolver" product)}"
+
+find_single() {
+	local directory=$1
+	local pattern=$2
+	local label=$3
+	local matches=()
+	local match
+	while IFS= read -r match; do
+		matches+=("$match")
+	done < <(find "$directory" -type f -name "$pattern" -print)
+	[[ ${#matches[@]} == 1 ]] || {
+		printf 'Expected exactly one %s under %s, found %s\n' \
+			"$label" "$directory" "${#matches[@]}" >&2
+		exit 1
+	}
+	printf '%s' "${matches[0]}"
+}
+
+file_size() {
+	if stat -c '%s' "$1" >/dev/null 2>&1; then
+		stat -c '%s' "$1"
+	else
+		stat -f '%z' "$1"
+	fi
+}
+
+verify_checksum_file() {
+	local checksum_file=$1
+	(
+		cd "$(dirname "$checksum_file")"
+		sha256sum --check "$(basename "$checksum_file")"
+	)
+}
+
+version="$("$resolver" product)"
+android_code="$("$resolver" android-code)"
+windows_package="$("$resolver" windows-package)"
+"$resolver" verify >/dev/null
+[[ $source_tag == "v$version" ]] || {
+	printf 'Release tag %s does not match canonical version v%s\n' \
+		"$source_tag" "$version" >&2
+	exit 1
+}
+
+deb="$(find_single "$input_dir/deb" '*.deb' 'Debian package')"
+rpm="$(find_single "$input_dir/rpm" '*.rpm' 'RPM package')"
+dmg="$(find_single "$input_dir/macos" '*.dmg' 'macOS DMG')"
+appcast="$(find_single "$input_dir/macos" 'appcast.xml' 'Sparkle appcast')"
+apple_metadata="$(find_single "$input_dir/macos" '*.build-info.json' 'direct macOS build metadata')"
+play_apk="$(find_single "$input_dir/play" '*-play-universal.apk' 'Play-signed APK')"
+play_metadata="$(find_single "$input_dir/play" 'play-release.json' 'Play release metadata')"
+msix="$(find_single "$input_dir/windows" '*.msix' 'Windows MSIX')"
+msixupload="$(find_single "$input_dir/windows" '*.msixupload' 'Windows MSIX upload')"
+windows_metadata="$(find_single "$input_dir/windows" '*.build-info.json' 'Windows build metadata')"
+
+[[ $(basename "$deb") == "vnidrop_${version}-1_amd64.deb" ]]
+[[ $(basename "$rpm") == "vnidrop-${version}-1.x86_64.rpm" ]]
+[[ $(basename "$dmg") == "VniDrop-${version}.dmg" ]]
+[[ $(basename "$play_apk") == "VniDrop-${version}-${android_code}-play-universal.apk" ]]
+[[ $(basename "$msix") == "VniDrop_${version}_x64.msix" ]]
+[[ $(basename "$msixupload") == "VniDrop_${version}_x64.msixupload" ]]
+[[ $(jq -r '.productVersion' "$apple_metadata") == "$version" ]]
+[[ $(jq -r '.distribution' "$apple_metadata") == direct ]]
+[[ $(jq -r '.artifact' "$apple_metadata") == "$(basename "$dmg")" ]]
+apple_direct_build="$(jq -r '.directBuildNumber' "$apple_metadata")"
+[[ $apple_direct_build =~ ^[1-9][0-9]*(\.[0-9]+){0,2}$ ]] || {
+	printf 'Invalid direct Apple build number: %s\n' "$apple_direct_build" >&2
+	exit 1
+}
+
+deb_checksum="$(find_single "$input_dir/deb" '*.sha256' 'Debian checksum')"
+rpm_checksum="$(find_single "$input_dir/rpm" '*.sha256' 'RPM checksum')"
+windows_checksums="$(find_single "$input_dir/windows" 'SHA256SUMS' 'Windows checksums')"
+play_checksums="$(find_single "$input_dir/play" 'SHA256SUMS' 'Play APK checksums')"
+verify_checksum_file "$deb_checksum"
+verify_checksum_file "$rpm_checksum"
+verify_checksum_file "$windows_checksums"
+verify_checksum_file "$play_checksums"
+
+[[ $(jq -r '.releaseStatus' "$play_metadata") == draft ]]
+[[ $(jq -r '.releaseName' "$play_metadata") == "$version" ]]
+[[ $(jq -r '.versionCode' "$play_metadata") == "$android_code" ]]
+play_track="$(jq -r '.track' "$play_metadata")"
+normalized_play_track="$(printf '%s' "$play_track" | tr '[:upper:]' '[:lower:]')"
+[[ $normalized_play_track != production && $normalized_play_track != *:production ]]
+[[ $(jq -r '.appVersion' "$windows_metadata") == "$version" ]]
+[[ $(jq -r '.packageVersion' "$windows_metadata") == "$windows_package" ]]
+grep -F "VniDrop-${version}.dmg" "$appcast" >/dev/null
+
+mkdir -p "$output_dir"
+[[ -z $(find "$output_dir" -mindepth 1 -maxdepth 1 -print -quit) ]] || {
+	printf 'Release output directory must be empty: %s\n' "$output_dir" >&2
+	exit 1
+}
+cp "$deb" "$rpm" "$dmg" "$appcast" "$play_apk" "$output_dir/"
+
+payloads=(
+	"$output_dir/$(basename "$deb")"
+	"$output_dir/$(basename "$rpm")"
+	"$output_dir/$(basename "$dmg")"
+	"$output_dir/$(basename "$appcast")"
+	"$output_dir/$(basename "$play_apk")"
+)
+files_json="$(
+	for file in "${payloads[@]}"; do
+		jq -n \
+			--arg name "$(basename "$file")" \
+			--arg sha256 "$(sha256sum "$file" | awk '{print $1}')" \
+			--argjson bytes "$(file_size "$file")" \
+			'{name: $name, sha256: $sha256, bytes: $bytes}'
+	done | jq -s .
+)"
+
+jq -n \
+	--arg productVersion "$version" \
+	--arg releaseChannel "$("$resolver" channel)" \
+	--arg tag "$source_tag" \
+	--arg commit "$source_commit" \
+	--arg androidVersionCode "$android_code" \
+	--arg appleDirectBuildNumber "$apple_direct_build" \
+	--arg windowsPackageVersion "$windows_package" \
+	--arg windowsMsixUpload "$(basename "$msixupload")" \
+	--arg windowsMsixUploadSha256 "$(sha256sum "$msixupload" | awk '{print $1}')" \
+	--arg playTrack "$play_track" \
+	--arg playBundleSha256 "$(jq -r '.bundleSha256' "$play_metadata")" \
+	--arg playCertificateSha256 "$(jq -r '.appSigningCertificateSha256' "$play_metadata")" \
+	--argjson files "$files_json" \
+	'{
+		productVersion: $productVersion,
+		releaseChannel: $releaseChannel,
+		tag: $tag,
+		sourceCommit: $commit,
+		platformVersions: {
+			androidVersionCode: ($androidVersionCode | tonumber),
+			appleDirectBuildNumber: $appleDirectBuildNumber,
+			windowsPackageVersion: $windowsPackageVersion
+		},
+		play: {
+			track: $playTrack,
+			status: "draft",
+			bundleSha256: $playBundleSha256,
+			appSigningCertificateSha256: $playCertificateSha256
+		},
+		windowsStore: {
+			publicReleaseAsset: false,
+			msixUpload: $windowsMsixUpload,
+			sha256: $windowsMsixUploadSha256
+		},
+		files: $files
+	}' > "$output_dir/release-manifest.json"
+
+(
+	cd "$output_dir"
+	sha256sum \
+		"$(basename "$deb")" \
+		"$(basename "$rpm")" \
+		"$(basename "$dmg")" \
+		"$(basename "$appcast")" \
+		"$(basename "$play_apk")" \
+		release-manifest.json \
+		> SHA256SUMS
+)
+
+printf 'Assembled public release assets in %s\n' "$output_dir"
+printf 'Windows Store submission retained as workflow artifact: %s\n' \
+	"$(basename "$msixupload")"
--- a/packaging/release/test-assemble-release.sh
+++ b/packaging/release/test-assemble-release.sh
@@ -0,0 +1,116 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+repo_root="$(cd "$script_dir/../.." && pwd)"
+fixture_root="$(mktemp -d "${TMPDIR:-/tmp}/vnidrop-release-test.XXXXXX")"
+trap 'rm -rf "$fixture_root"' EXIT
+
+input_dir="$fixture_root/input"
+output_dir="$fixture_root/output"
+mkdir -p \
+	"$input_dir/deb" \
+	"$input_dir/rpm" \
+	"$input_dir/macos" \
+	"$input_dir/play" \
+	"$input_dir/windows"
+
+version="$("$repo_root/packaging/version/resolve-version.sh" product)"
+android_code="$("$repo_root/packaging/version/resolve-version.sh" android-code)"
+windows_package="$("$repo_root/packaging/version/resolve-version.sh" windows-package)"
+apple_direct_build=20260728.1432.17
+
+printf 'deb\n' > "$input_dir/deb/vnidrop_${version}-1_amd64.deb"
+printf 'rpm\n' > "$input_dir/rpm/vnidrop-${version}-1.x86_64.rpm"
+printf 'dmg\n' > "$input_dir/macos/VniDrop-${version}.dmg"
+printf '<url>VniDrop-%s.dmg</url>\n' "$version" > "$input_dir/macos/appcast.xml"
+printf 'apk\n' > "$input_dir/play/VniDrop-${version}-${android_code}-play-universal.apk"
+printf 'msix\n' > "$input_dir/windows/VniDrop_${version}_x64.msix"
+printf 'msixupload\n' > "$input_dir/windows/VniDrop_${version}_x64.msixupload"
+
+jq -n \
+	--arg productVersion "$version" \
+	--arg directBuildNumber "$apple_direct_build" \
+	--arg artifact "VniDrop-${version}.dmg" \
+	'{
+		productVersion: $productVersion,
+		directBuildNumber: $directBuildNumber,
+		distribution: "direct",
+		artifact: $artifact
+	}' > "$input_dir/macos/VniDrop-${version}.build-info.json"
+
+jq -n \
+	--arg releaseName "$version" \
+	--argjson versionCode "$android_code" \
+	'{
+		releaseStatus: "draft",
+		releaseName: $releaseName,
+		versionCode: $versionCode,
+		track: "closed-beta",
+		bundleSha256: "bundle-sha",
+		appSigningCertificateSha256: "certificate-sha"
+	}' > "$input_dir/play/play-release.json"
+
+jq -n \
+	--arg appVersion "$version" \
+	--arg packageVersion "$windows_package" \
+	'{appVersion: $appVersion, packageVersion: $packageVersion}' \
+	> "$input_dir/windows/VniDrop_${version}_x64.build-info.json"
+
+(
+	cd "$input_dir/deb"
+	sha256sum "vnidrop_${version}-1_amd64.deb" \
+		> "vnidrop_${version}-1_amd64.deb.sha256"
+)
+(
+	cd "$input_dir/rpm"
+	sha256sum "vnidrop-${version}-1.x86_64.rpm" \
+		> "vnidrop-${version}-1.x86_64.rpm.sha256"
+)
+(
+	cd "$input_dir/play"
+	sha256sum \
+		"VniDrop-${version}-${android_code}-play-universal.apk" \
+		play-release.json \
+		> SHA256SUMS
+)
+(
+	cd "$input_dir/windows"
+	sha256sum \
+		"VniDrop_${version}_x64.msix" \
+		"VniDrop_${version}_x64.msixupload" \
+		"VniDrop_${version}_x64.build-info.json" \
+		> SHA256SUMS
+)
+
+GITHUB_REF_NAME="v$version" \
+	GITHUB_SHA=fixture-commit \
+	VNIDROP_RELEASE_INPUT_DIR="$input_dir" \
+	VNIDROP_RELEASE_OUTPUT_DIR="$output_dir" \
+	"$script_dir/assemble-release.sh" >/dev/null
+
+expected_public_files=(
+	"SHA256SUMS"
+	"VniDrop-${version}-${android_code}-play-universal.apk"
+	"VniDrop-${version}.dmg"
+	"appcast.xml"
+	"release-manifest.json"
+	"vnidrop-${version}-1.x86_64.rpm"
+	"vnidrop_${version}-1_amd64.deb"
+)
+actual_public_files=()
+while IFS= read -r file; do
+	actual_public_files+=("$(basename "$file")")
+done < <(find "$output_dir" -maxdepth 1 -type f -print | sort)
+[[ ${actual_public_files[*]} == "${expected_public_files[*]}" ]]
+
+[[ $(jq -r '.productVersion' "$output_dir/release-manifest.json") == "$version" ]]
+[[ $(jq -r '.platformVersions.appleDirectBuildNumber' \
+	"$output_dir/release-manifest.json") == "$apple_direct_build" ]]
+[[ $(jq -r '.play.status' "$output_dir/release-manifest.json") == draft ]]
+[[ $(jq -r '.windowsStore.publicReleaseAsset' "$output_dir/release-manifest.json") == false ]]
+(
+	cd "$output_dir"
+	sha256sum --check SHA256SUMS >/dev/null
+)
--- a/packaging/release/test-release-config.sh
+++ b/packaging/release/test-release-config.sh
@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+repo_root="$(cd "$script_dir/../.." && pwd)"
+
+dry_run="$(make -n -C "$repo_root" build-apple-dmg)"
+localization_line="$(
+	printf '%s\n' "$dry_run" |
+		awk '/bun run generate/ {print NR; exit}'
+)"
+build_line="$(
+	printf '%s\n' "$dry_run" |
+		awk '/apple\/scripts\/build-dmg\.sh/ {print NR; exit}'
+)"
+[[ -n $localization_line && -n $build_line && $localization_line -lt $build_line ]] || {
+	printf 'build-apple-dmg must generate localization before building the DMG\n' >&2
+	exit 1
+}
+
+grep -F 'run: make build-apple-dmg' \
+	"$repo_root/.github/workflows/apple-release.yml" >/dev/null || {
+	printf 'Apple release workflow must use the generated-input-aware Make target\n' >&2
+	exit 1
+}
+
+printf 'Release configuration tests passed.\n'
--- a/packaging/version/README.md
+++ b/packaging/version/README.md
@@ -0,0 +1,78 @@
+# Application versioning
+
+`version.properties` at the repository root is the single source of truth for
+the VniDrop product version and the permanent Windows version epoch. Platform
+projects and release workflows derive their versions from it rather than
+accepting independent release counters.
+
+Keep it as plain `KEY=VALUE` assignments: the same file is parsed by shell,
+PowerShell, Gradle, and Rust. Xcode receives resolver-generated xcconfig files.
+
+The product uses numeric semantic versions. While the app is in beta, feature
+releases increment the minor component (`0.2.0`, `0.3.0`) and fixes increment
+the patch component (`0.2.1`). Release channels belong in
+`RELEASE_CHANNEL`; they are not appended to store version fields.
+
+| Platform | Product version | Platform build/package version |
+| --- | --- | --- |
+| Android | `PRODUCT_VERSION` | Derived monotonic integer |
+| Apple Store | `PRODUCT_VERSION` | Derived UTC `YYYYMMDD.HHMM.SS` |
+| Direct macOS | `PRODUCT_VERSION` | Independently derived UTC `YYYYMMDD.HHMM.SS` |
+| Linux | `PRODUCT_VERSION` | Native package revision |
+| Rust handshake | `PRODUCT_VERSION` | Rust crate version remains independent |
+| Microsoft Store | `PRODUCT_VERSION` in the app | Derived MSIX dot-quad |
+
+MSIX requires a non-zero first component and reserves the fourth component for
+the Store. Its version is:
+
+```text
+(product major + WINDOWS_VERSION_EPOCH).product minor.product patch.0
+```
+
+With epoch `1`, product `0.2.0` maps to MSIX `1.2.0.0`, while product `1.0.0`
+maps to `2.0.0.0`. Do not change the epoch after publishing.
+
+Android derives its version code as:
+
+```text
+product major * 1,000,000 + product minor * 1,000 + product patch
+```
+
+For example, `0.2.0` maps to Android code `2000`, `0.2.1` to `2001`, and
+`1.0.0` to `1000000`. To keep that mapping unique and within store limits,
+the product major may not exceed `2099`, and minor and patch may not exceed
+`999`. A rejected store build must use a new patch version rather than
+rebuilding a previously uploaded product version.
+
+Apple build numbers are derived at build time by `apple-store-build` and
+`apple-direct-build`; they are kept as separate resolver outputs so App Store
+and Sparkle releases do not consume each other's cadence. Every changed Windows
+Store package must increment the product version because the Store-reserved
+fourth component cannot carry a rebuild number.
+
+Apple projects read generated build settings rather than `version.properties`
+directly:
+
+```bash
+packaging/version/generate-apple-xcconfig.sh all
+```
+
+The generated files under `apple/Generated/` are intentionally ignored.
+`VNIDROP_BUILD_TIME_UTC=YYYYMMDDHHMMSS` provides a deterministic clock for
+tests; distribution builds normally use the current UTC time.
+
+Prepare the next release by changing only the product version:
+
+```bash
+make prepare-release RELEASE_VERSION=0.2.1
+```
+
+The command refuses non-increasing versions, updates `PRODUCT_VERSION`, and
+prints the derived Android and Microsoft Store versions. Then verify:
+
+```bash
+make check-version
+```
+
+Release tags must exactly match `vPRODUCT_VERSION`. Manual workflow dispatches
+also build the committed version and do not accept free-form version inputs.
--- a/packaging/version/generate-apple-xcconfig.sh
+++ b/packaging/version/generate-apple-xcconfig.sh
@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+repo_root="$(cd "$script_dir/../.." && pwd)"
+resolver="$script_dir/resolve-version.sh"
+output_dir="${VNIDROP_APPLE_XCCONFIG_DIR:-$repo_root/apple/Generated}"
+mode="${1:-all}"
+
+case "$mode" in
+	store|direct|all) ;;
+	*)
+		printf 'Usage: %s {store|direct|all}\n' "$0" >&2
+		exit 1
+		;;
+esac
+
+export VNIDROP_BUILD_TIME_UTC="${VNIDROP_BUILD_TIME_UTC:-$(date -u +%Y%m%d%H%M%S)}"
+product_version="$("$resolver" product)"
+mkdir -p "$output_dir"
+
+write_config() {
+	local filename=$1
+	local build_field=$2
+	local destination="$output_dir/$filename"
+	local temporary
+	local build_number
+
+	build_number="$("$resolver" "$build_field")"
+	temporary="$(mktemp "$output_dir/.${filename}.XXXXXX")"
+	printf '%s\n' \
+		'// Generated by packaging/version/generate-apple-xcconfig.sh.' \
+		'// Regenerate this file instead of editing it.' \
+		'#include "../Signing.xcconfig"' \
+		'' \
+		"PRODUCT_VERSION = $product_version" \
+		"CURRENT_PROJECT_VERSION = $build_number" \
+		> "$temporary"
+	mv "$temporary" "$destination"
+}
+
+if [[ $mode == store || $mode == all ]]; then
+	write_config StoreVersion.xcconfig apple-store-build
+fi
+if [[ $mode == direct || $mode == all ]]; then
+	write_config DirectVersion.xcconfig apple-direct-build
+fi
--- a/packaging/version/prepare-release.sh
+++ b/packaging/version/prepare-release.sh
@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+repo_root="$(cd "$script_dir/../.." && pwd)"
+resolver="$script_dir/resolve-version.sh"
+version_file="${VNIDROP_VERSION_FILE:-$repo_root/version.properties}"
+next_version="${1:-}"
+
+fail() {
+	printf '%s\n' "$*" >&2
+	exit 1
+}
+
+[[ -n $next_version ]] ||
+	fail "Usage: $0 MAJOR.MINOR.PATCH"
+[[ -f $version_file ]] ||
+	fail "Version file not found: $version_file"
+[[ $(grep -c '^PRODUCT_VERSION=' "$version_file") == 1 ]] ||
+	fail "Expected exactly one PRODUCT_VERSION entry in $version_file"
+
+current_version="$(
+	VNIDROP_VERSION_FILE="$version_file" "$resolver" product
+)"
+current_android_code="$(
+	VNIDROP_VERSION_FILE="$version_file" "$resolver" android-code
+)"
+temporary="$(mktemp "$(dirname "$version_file")/.version.properties.XXXXXX")"
+trap 'rm -f "$temporary"' EXIT
+
+sed "s/^PRODUCT_VERSION=.*/PRODUCT_VERSION=$next_version/" \
+	"$version_file" > "$temporary"
+
+next_android_code="$(
+	VNIDROP_VERSION_FILE="$temporary" "$resolver" android-code
+)"
+next_windows_package="$(
+	VNIDROP_VERSION_FILE="$temporary" "$resolver" windows-package
+)"
+VNIDROP_VERSION_FILE="$temporary" "$resolver" verify >/dev/null
+
+(( next_android_code > current_android_code )) ||
+	fail "New version must be greater than $current_version"
+
+chmod 644 "$temporary"
+mv "$temporary" "$version_file"
+trap - EXIT
+
+printf 'Prepared VniDrop %s\n' "$next_version"
+printf '  Android version code: %s\n' "$next_android_code"
+printf '  Microsoft Store package: %s\n' "$next_windows_package"
+printf 'Next: make check-version\n'
--- a/packaging/version/resolve-version.ps1
+++ b/packaging/version/resolve-version.ps1
@@ -0,0 +1,121 @@
+[CmdletBinding()]
+param(
+	[ValidateSet("Product", "Channel", "AndroidCode", "AppleStoreBuild", "AppleDirectBuild", "WindowsPackage", "Json", "Verify")]
+	[string] $Field = "Verify",
+
+	[switch] $VerifyTag,
+
+	[string] $VersionFile
+)
+
+Set-StrictMode -Version Latest
+$ErrorActionPreference = "Stop"
+
+if ([string]::IsNullOrWhiteSpace($VersionFile)) {
+	$VersionFile = Join-Path $PSScriptRoot "..\..\version.properties"
+}
+$VersionFile = (Resolve-Path -LiteralPath $VersionFile).Path
+
+function Read-VersionProperty {
+	param([string] $Name)
+
+	$prefix = "$Name="
+	$matches = @(Get-Content -LiteralPath $VersionFile | Where-Object { $_.StartsWith($prefix) })
+	if ($matches.Count -ne 1) {
+		throw "Expected exactly one $Name entry in $VersionFile"
+	}
+	return $matches[0].Substring($prefix.Length)
+}
+
+function Convert-CanonicalInteger {
+	param(
+		[string] $Name,
+		[string] $Value,
+		[long] $Minimum,
+		[long] $Maximum
+	)
+
+	if ($Value -notmatch "^(0|[1-9][0-9]*)$") {
+		throw "$Name must be a canonical non-negative integer"
+	}
+	$number = 0L
+	if (-not [long]::TryParse($Value, [ref] $number) -or $number -lt $Minimum -or $number -gt $Maximum) {
+		throw "$Name must be between $Minimum and $Maximum"
+	}
+	return $number
+}
+
+$productVersion = Read-VersionProperty "PRODUCT_VERSION"
+$releaseChannel = Read-VersionProperty "RELEASE_CHANNEL"
+$windowsVersionEpochText = Read-VersionProperty "WINDOWS_VERSION_EPOCH"
+$buildTimeUtc = $env:VNIDROP_BUILD_TIME_UTC
+if ([string]::IsNullOrWhiteSpace($buildTimeUtc)) {
+	$buildTimeUtc = [DateTime]::UtcNow.ToString(
+		"yyyyMMddHHmmss",
+		[Globalization.CultureInfo]::InvariantCulture
+	)
+}
+if ($buildTimeUtc -notmatch "^[0-9]{14}$") {
+	throw "VNIDROP_BUILD_TIME_UTC must use YYYYMMDDHHMMSS"
+}
+$parsedBuildTime = [DateTime]::MinValue
+if (-not [DateTime]::TryParseExact(
+		$buildTimeUtc,
+		"yyyyMMddHHmmss",
+		[Globalization.CultureInfo]::InvariantCulture,
+		[Globalization.DateTimeStyles]::AssumeUniversal -bor [Globalization.DateTimeStyles]::AdjustToUniversal,
+		[ref] $parsedBuildTime
+	)) {
+	throw "VNIDROP_BUILD_TIME_UTC is not a valid UTC timestamp"
+}
+$appleBuildNumber = $parsedBuildTime.ToString(
+	"yyyyMMdd.HHmm.ss",
+	[Globalization.CultureInfo]::InvariantCulture
+)
+
+if ($productVersion -notmatch "^(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)$") {
+	throw "PRODUCT_VERSION must use canonical MAJOR.MINOR.PATCH integers"
+}
+$productParts = $productVersion.Split(".")
+$productMajor = Convert-CanonicalInteger "PRODUCT_VERSION major" $productParts[0] 0 2099
+$productMinor = Convert-CanonicalInteger "PRODUCT_VERSION minor" $productParts[1] 0 999
+$productPatch = Convert-CanonicalInteger "PRODUCT_VERSION patch" $productParts[2] 0 999
+if ($releaseChannel -notmatch "^[a-z][a-z0-9-]*$") {
+	throw "RELEASE_CHANNEL contains unsupported characters"
+}
+$androidVersionCode = $productMajor * 1000000L + $productMinor * 1000L + $productPatch
+if ($androidVersionCode -lt 1 -or $androidVersionCode -gt 2100000000L) {
+	throw "Derived Android version code must be between 1 and 2100000000"
+}
+$windowsVersionEpoch = Convert-CanonicalInteger "WINDOWS_VERSION_EPOCH" $windowsVersionEpochText 1 65535
+$windowsMajor = $productMajor + $windowsVersionEpoch
+if ($windowsMajor -gt 65535) {
+	throw "Derived Windows package major exceeds 65535"
+}
+$windowsPackageVersion = "$windowsMajor.$($productParts[1]).$($productParts[2]).0"
+
+if ($VerifyTag -and $env:GITHUB_REF_TYPE -eq "tag" -and $env:GITHUB_REF_NAME -ne "v$productVersion") {
+	throw "Release tag must be v$productVersion, got $($env:GITHUB_REF_NAME)"
+}
+
+$versionInfo = [ordered] @{
+	productVersion = $productVersion
+	releaseChannel = $releaseChannel
+	androidVersionCode = $androidVersionCode
+	appleStoreBuildNumber = $appleBuildNumber
+	appleDirectBuildNumber = $appleBuildNumber
+	windowsPackageVersion = $windowsPackageVersion
+}
+
+switch ($Field) {
+	"Product" { $productVersion }
+	"Channel" { $releaseChannel }
+	"AndroidCode" { $androidVersionCode }
+	"AppleStoreBuild" { $appleBuildNumber }
+	"AppleDirectBuild" { $appleBuildNumber }
+	"WindowsPackage" { $windowsPackageVersion }
+	"Json" { $versionInfo | ConvertTo-Json -Compress }
+	"Verify" {
+		"VniDrop $productVersion ($releaseChannel), Android $androidVersionCode, Apple Store $appleBuildNumber, Apple Direct $appleBuildNumber, MSIX $windowsPackageVersion"
+	}
+}
--- a/packaging/version/resolve-version.sh
+++ b/packaging/version/resolve-version.sh
@@ -0,0 +1,136 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+repo_root="$(cd "$script_dir/../.." && pwd)"
+version_file="${VNIDROP_VERSION_FILE:-$repo_root/version.properties}"
+
+fail() {
+	printf '%s\n' "$*" >&2
+	exit 1
+}
+
+read_property() {
+	local key=$1
+	local matches
+	matches="$(sed -n "s/^${key}=//p" "$version_file")"
+	[[ -n "$matches" ]] || fail "Missing $key in $version_file"
+	[[ $(printf '%s\n' "$matches" | wc -l | tr -d ' ') == 1 ]] ||
+		fail "Duplicate $key in $version_file"
+	printf '%s' "$matches"
+}
+
+validate_canonical_integer() {
+	local name=$1
+	local value=$2
+	local minimum=$3
+	local maximum=$4
+	[[ $value =~ ^(0|[1-9][0-9]*)$ ]] ||
+		fail "$name must be a canonical non-negative integer"
+	(( 10#$value >= minimum && 10#$value <= maximum )) ||
+		fail "$name must be between $minimum and $maximum"
+}
+
+product_version="$(read_property PRODUCT_VERSION)"
+release_channel="$(read_property RELEASE_CHANNEL)"
+windows_version_epoch="$(read_property WINDOWS_VERSION_EPOCH)"
+build_time_utc="${VNIDROP_BUILD_TIME_UTC:-$(date -u +%Y%m%d%H%M%S)}"
+
+[[ $product_version =~ ^(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)$ ]] ||
+	fail "PRODUCT_VERSION must use canonical MAJOR.MINOR.PATCH integers"
+IFS=. read -r product_major product_minor product_patch <<< "$product_version"
+validate_canonical_integer "PRODUCT_VERSION major" "$product_major" 0 2099
+validate_canonical_integer "PRODUCT_VERSION minor" "$product_minor" 0 999
+validate_canonical_integer "PRODUCT_VERSION patch" "$product_patch" 0 999
+[[ $release_channel =~ ^[a-z][a-z0-9-]*$ ]] ||
+	fail "RELEASE_CHANNEL must start with a lowercase letter and contain only lowercase letters, digits, and hyphens"
+validate_canonical_integer "WINDOWS_VERSION_EPOCH" "$windows_version_epoch" 1 65535
+[[ $build_time_utc =~ ^[0-9]{14}$ ]] ||
+	fail "VNIDROP_BUILD_TIME_UTC must use YYYYMMDDHHMMSS"
+
+android_version_code=$((
+	(10#$product_major * 1000000) +
+		(10#$product_minor * 1000) +
+		10#$product_patch
+))
+(( android_version_code >= 1 && android_version_code <= 2100000000 )) ||
+	fail "Derived Android version code must be between 1 and 2100000000"
+
+build_month="${build_time_utc:4:2}"
+build_day="${build_time_utc:6:2}"
+build_hour="${build_time_utc:8:2}"
+build_minute="${build_time_utc:10:2}"
+build_second="${build_time_utc:12:2}"
+build_year="${build_time_utc:0:4}"
+(( 10#$build_year >= 1 )) ||
+	fail "VNIDROP_BUILD_TIME_UTC contains an invalid year"
+(( 10#$build_month >= 1 && 10#$build_month <= 12 )) ||
+	fail "VNIDROP_BUILD_TIME_UTC contains an invalid month"
+
+case $((10#$build_month)) in
+	2)
+		max_build_day=28
+		if (( 10#$build_year % 400 == 0 ||
+			(10#$build_year % 4 == 0 && 10#$build_year % 100 != 0) )); then
+			max_build_day=29
+		fi
+		;;
+	4|6|9|11)
+		max_build_day=30
+		;;
+	*)
+		max_build_day=31
+		;;
+esac
+(( 10#$build_day >= 1 && 10#$build_day <= max_build_day )) ||
+	fail "VNIDROP_BUILD_TIME_UTC contains an invalid day"
+(( 10#$build_hour <= 23 && 10#$build_minute <= 59 && 10#$build_second <= 59 )) ||
+	fail "VNIDROP_BUILD_TIME_UTC contains an invalid time"
+apple_build_number="${build_time_utc:0:8}.${build_time_utc:8:4}.${build_time_utc:12:2}"
+
+windows_major=$((10#$product_major + 10#$windows_version_epoch))
+(( windows_major <= 65535 )) ||
+	fail "Derived Windows package major exceeds 65535"
+windows_package_version="$windows_major.$product_minor.$product_patch.0"
+
+verify_tag() {
+	local tag=${1:-${GITHUB_REF_NAME:-}}
+	if [[ ${GITHUB_REF_TYPE:-} == tag || -n ${1:-} ]]; then
+		[[ $tag == "v$product_version" ]] ||
+			fail "Release tag must be v$product_version, got ${tag:-<empty>}"
+	fi
+}
+
+case "${1:-verify}" in
+	product)
+		printf '%s\n' "$product_version"
+		;;
+	channel)
+		printf '%s\n' "$release_channel"
+		;;
+	android-code)
+		printf '%s\n' "$android_version_code"
+		;;
+	apple-store-build)
+		printf '%s\n' "$apple_build_number"
+		;;
+	apple-direct-build)
+		printf '%s\n' "$apple_build_number"
+		;;
+	windows-package)
+		printf '%s\n' "$windows_package_version"
+		;;
+	verify)
+		verify_tag
+		printf 'VniDrop %s (%s), Android %s, Apple Store %s, Apple Direct %s, MSIX %s\n' \
+			"$product_version" "$release_channel" "$android_version_code" \
+			"$apple_build_number" "$apple_build_number" "$windows_package_version"
+		;;
+	verify-tag)
+		verify_tag "${2:-}"
+		;;
+	*)
+		fail "Usage: $0 {product|channel|android-code|apple-store-build|apple-direct-build|windows-package|verify|verify-tag [tag]}"
+		;;
+esac
--- a/packaging/version/test-version.sh
+++ b/packaging/version/test-version.sh
@@ -0,0 +1,88 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+resolver="$script_dir/resolve-version.sh"
+prepare_release="$script_dir/prepare-release.sh"
+scratch="$(mktemp -d)"
+trap 'rm -rf "$scratch"' EXIT
+
+write_version() {
+	printf '%s\n' \
+		"PRODUCT_VERSION=$1" \
+		"RELEASE_CHANNEL=$2" \
+		"WINDOWS_VERSION_EPOCH=$3" \
+		> "$scratch/version.properties"
+}
+
+resolve() {
+	VNIDROP_VERSION_FILE="$scratch/version.properties" "$resolver" "$@"
+}
+
+expect_failure() {
+	if "$@" >/dev/null 2>&1; then
+		printf 'Expected command to fail: %s\n' "$*" >&2
+		exit 1
+	fi
+}
+
+export VNIDROP_BUILD_TIME_UTC=20260728143217
+
+write_version 0.2.0 beta 1
+[[ $(resolve product) == 0.2.0 ]]
+[[ $(resolve android-code) == 2000 ]]
+[[ $(resolve apple-store-build) == 20260728.1432.17 ]]
+[[ $(resolve apple-direct-build) == 20260728.1432.17 ]]
+[[ $(resolve windows-package) == 1.2.0.0 ]]
+resolve verify-tag v0.2.0
+expect_failure resolve verify-tag v1.0.0
+
+write_version 1.0.0 stable 1
+[[ $(resolve android-code) == 1000000 ]]
+[[ $(resolve windows-package) == 2.0.0.0 ]]
+
+write_version 2099.999.999 stable 1
+[[ $(resolve android-code) == 2099999999 ]]
+
+write_version 01.0.0 beta 1
+expect_failure resolve verify
+
+write_version 0.0.0 beta 1
+expect_failure resolve verify
+
+write_version 2100.0.0 stable 1
+expect_failure resolve verify
+
+write_version 0.1000.0 stable 1
+expect_failure resolve verify
+
+write_version 0.0.1000 stable 1
+expect_failure resolve verify
+
+VNIDROP_BUILD_TIME_UTC=20260728146000 expect_failure resolve verify
+VNIDROP_BUILD_TIME_UTC=2026-07-28 expect_failure resolve verify
+VNIDROP_BUILD_TIME_UTC=20260229080000 expect_failure resolve verify
+
+write_version 0.2.0 beta 1
+config_dir="$scratch/xcconfig"
+VNIDROP_VERSION_FILE="$scratch/version.properties" \
+	VNIDROP_APPLE_XCCONFIG_DIR="$config_dir" \
+	"$script_dir/generate-apple-xcconfig.sh" all
+grep -Fx "PRODUCT_VERSION = 0.2.0" "$config_dir/StoreVersion.xcconfig" >/dev/null
+grep -Fx "CURRENT_PROJECT_VERSION = 20260728.1432.17" \
+	"$config_dir/StoreVersion.xcconfig" >/dev/null
+grep -Fx "CURRENT_PROJECT_VERSION = 20260728.1432.17" \
+	"$config_dir/DirectVersion.xcconfig" >/dev/null
+
+VNIDROP_VERSION_FILE="$scratch/version.properties" \
+	"$prepare_release" 0.2.1 >/dev/null
+[[ $(resolve product) == 0.2.1 ]]
+[[ $(resolve android-code) == 2001 ]]
+[[ $(resolve windows-package) == 1.2.1.0 ]]
+expect_failure env VNIDROP_VERSION_FILE="$scratch/version.properties" \
+	"$prepare_release" 0.2.1
+expect_failure env VNIDROP_VERSION_FILE="$scratch/version.properties" \
+	"$prepare_release" 0.1.999
+
+printf 'Version resolver tests passed.\n'
--- a/packaging/windows/README.md
+++ b/packaging/windows/README.md
@@ -24,15 +24,17 @@ after the first release. The manifest display name uses the exact reserved Store
 name; the product's in-app branding and launcher remain `VniDrop`.

 The initial package targets Windows Desktop x64, Windows 10 version 2004
-(build 19041) or later. The fourth MSIX version component is reserved by the
-Store, so app version 1.2.3 becomes package version 1.2.3.0.
+(build 19041) or later. The product version comes from `version.properties`.
+Because MSIX requires a non-zero major and reserves the fourth component, the
+package version adds `WINDOWS_VERSION_EPOCH` to the product major. With epoch
+`1`, product version `0.2.0` becomes package version `1.2.0.0`.

 ## GitHub Actions

 The Windows Store package workflow runs automatically for relevant pull
-requests, for release tags matching vMAJOR.MINOR.PATCH, and by manual dispatch.
-Pull requests build and validate without retaining an artifact. Tags and manual
-runs retain:
+requests and by manual dispatch. The coordinated release workflow also calls
+it for a canonical `vMAJOR.MINOR.PATCH` tag. Pull requests build and validate
+without retaining an artifact. Manual and coordinated-release runs retain:

 - VniDrop_VERSION_x64.msix
 - VniDrop_VERSION_x64.msixupload
@@ -54,7 +56,8 @@ MakeAppx unpacks the finished package.
 Microsoft's current GitHub Actions publishing flow is for updates to an
 already-live free product. For the first release:

-1. Run this workflow from a release tag or by manual dispatch.
+1. Push a canonical release tag to run the coordinated workflow, or run the
+   Windows package workflow manually.
 2. Download the retained artifact.
 3. Test that exact build on an interactive Windows VM. Local installation needs
   an ephemeral development signature trusted only by that VM; this is not a
@@ -71,25 +74,30 @@ Use this restricted-capability justification in Submission options:
 > Rust and JVM libraries and needs normal user-level filesystem and network
 > access to transfer user-selected files directly between devices.

-After the first release is certified and live, Store publication can be added
-as a separate protected job. Keep its Partner Center credentials in a GitHub
-Environment, not in this build job:
+After the first release is certified and live, the coordinated release
+workflow submits the generated `.msixupload` from a separate protected job.
+Keep its Partner Center credentials in the `microsoft-store` GitHub
+Environment, not in the build job:

 - AZURE_AD_TENANT_ID
 - AZURE_AD_APPLICATION_CLIENT_ID
 - AZURE_AD_APPLICATION_SECRET
 - SELLER_ID

-The Store ID is a non-secret variable.
+Set `MICROSOFT_STORE_PRODUCT_ID` to `9NJ5Q0FG7TGL` as a non-secret variable in
+the same environment. The publishing job validates the product ID,
+authenticates with the pinned Microsoft Store Developer CLI, verifies access to
+the product, and submits only the package for certification. Existing listings,
+pricing, and availability are preserved.

 ## Manual build on Windows

 From the repository root:

 ~~~powershell
-.\gradlew.bat :shared:jvmTest :desktopApp:createReleaseDistributable -Pvnidrop.version=1.0.0 -Pvnidrop.desktop.rustVariant=release -Pvnidrop.diagnostics.included=false --no-daemon --no-configuration-cache --stacktrace
+.\gradlew.bat :shared:jvmTest :desktopApp:createReleaseDistributable -Pvnidrop.desktop.rustVariant=release -Pvnidrop.diagnostics.included=false --no-daemon --no-configuration-cache --stacktrace

-.\packaging\windows\build-msix.ps1 -Version 1.0.0 -AppImage .\desktopApp\build\compose\binaries\main-release\app\VniDrop -OutputDirectory .\build\release\windows
+.\packaging\windows\build-msix.ps1 -AppImage .\desktopApp\build\compose\binaries\main-release\app\VniDrop -OutputDirectory .\build\release\windows
 ~~~

 The packaging script requires Windows SDK 10.0.26100.0. It uses MakePri to
--- a/packaging/windows/build-msix.ps1
+++ b/packaging/windows/build-msix.ps1
@@ -1,8 +1,5 @@
 [CmdletBinding()]
 param(
-	[Parameter(Mandatory)]
-	[string] $Version,
-
 	[Parameter(Mandatory)]
 	[string] $AppImage,

@@ -87,16 +84,11 @@ if ([System.Environment]::OSVersion.Platform -ne [System.PlatformID]::Win32NT) {
 	throw "MSIX packaging must run on Windows"
 }

-$versionParts = $Version.Split(".")
-Assert-Condition ($versionParts.Count -eq 3) "Version must use MAJOR.MINOR.PATCH"
-for ($index = 0; $index -lt $versionParts.Count; $index++) {
-	$part = $versionParts[$index]
-	$number = 0
-	Assert-Condition ([int]::TryParse($part, [ref] $number)) "Version components must be integers"
-	Assert-Condition ($number.ToString() -eq $part) "Version components must not contain leading zeroes"
-	Assert-Condition ($number -ge $(if ($index -eq 0) { 1 } else { 0 }) -and $number -le 65535) "Version components must be between 0 and 65535, with a non-zero major"
-}
-$packageVersion = "$Version.0"
+$versionResolver = Join-Path $PSScriptRoot "..\version\resolve-version.ps1"
+$versionInfoJson = & $versionResolver -Field Json -VerifyTag
+$versionInfo = $versionInfoJson | ConvertFrom-Json
+$Version = [string] $versionInfo.productVersion
+$packageVersion = [string] $versionInfo.windowsPackageVersion

 $appImagePath = (Resolve-Path -LiteralPath $AppImage).Path
 Assert-Condition (Test-Path -LiteralPath $appImagePath -PathType Container) "App image not found: $AppImage"
--- a/shared/build.gradle.kts
+++ b/shared/build.gradle.kts
@@ -37,7 +37,7 @@ plugins {
 	alias(libs.plugins.kotlinAtomicfu)
 }

-val appVersion = providers.gradleProperty("vnidrop.version").get()
+val appVersion = rootProject.extra["vnidrop.productVersion"] as String
 val desktopRustVariant = providers.gradleProperty("vnidrop.desktop.rustVariant")
 	.map { value ->
 		when (value.trim().lowercase()) {
--- a/shared/src/androidMain/kotlin/com/vnidrop/app/Platform.android.kt
+++ b/shared/src/androidMain/kotlin/com/vnidrop/app/Platform.android.kt
@@ -52,7 +52,7 @@ private class AndroidDeviceInfoProvider(

 private fun Context.appVersion(): String = runCatching {
 	packageManager.getPackageInfo(packageName, 0).versionName
-}.getOrNull()?.takeIf(String::isNotBlank) ?: "0.1.0"
+}.getOrNull()?.takeIf(String::isNotBlank) ?: "unknown"

 private fun Context.activeNetworkSummary(): String? = runCatching {
 	val manager = getSystemService(Context.CONNECTIVITY_SERVICE) as? ConnectivityManager
--- a/shared/src/jvmMain/kotlin/com/vnidrop/app/Platform.jvm.kt
+++ b/shared/src/jvmMain/kotlin/com/vnidrop/app/Platform.jvm.kt
@@ -14,7 +14,7 @@ fun rememberJvmAppDependencies(externalInvitations: ExternalInvitationController
 		AppDependencies(
 			environment = PlatformEnvironment(
 				name = "Java ${System.getProperty("java.version")}",
-				appVersion = AppDependencies::class.java.`package`.implementationVersion ?: "0.1.0",
+				appVersion = AppDependencies::class.java.`package`.implementationVersion ?: "unknown",
 				defaultCoreDataDir = System.getProperty("user.home") + "/.vnidrop",
 				defaultUsername = System.getenv("COMPUTERNAME") ?: System.getenv("HOSTNAME") ?: System.getProperty("user.name") ?: "Receiver",
 				uiPlatform = uiPlatformForJvm(System.getProperty("os.name")),
--- a/version.properties
+++ b/version.properties
@@ -0,0 +1,3 @@
+PRODUCT_VERSION=0.2.1
+RELEASE_CHANNEL=beta
+WINDOWS_VERSION_EPOCH=1
Author	SHA1	Message	Date
Hammed Abass	8b75423b7a	fix(release): repair Apple and Android builds	2026-07-30 20:26:27 +02:00
Hammed Abass	7236933b76	Merge pull request #38 from sudosylabs/feat/release-0.2.1 chore(release): prepare 0.2.1	2026-07-30 19:43:19 +02:00
Hammed Abass	fc732e1b77	chore(release): prepare 0.2.1	2026-07-30 19:27:57 +02:00
Hammed Abass	d097c82f6a	Merge pull request #37 from sudosylabs/feat/microsoft-store-publishing ci: automate Microsoft Store updates	2026-07-30 19:25:15 +02:00
Hammed Abass	caaa9a472d	ci: automate Microsoft Store updates	2026-07-30 19:12:50 +02:00
Hammed Abass	4ce124da7c	Merge pull request #36 from sudosylabs/feat/automated-release-versions feat(release): automate derived store versions	2026-07-30 17:58:18 +02:00
Hammed Abass	94a8b3481b	feat(release): automate derived store versions	2026-07-30 17:40:00 +02:00
Hammed Abass	6d908d8dc3	Merge pull request #35 from sudosylabs/feat/release-pipeline ci: add coordinated cross-platform release pipeline	2026-07-28 11:58:18 +02:00
Hammed Abass	c6655da7db	refactor(version): derive Apple build numbers	2026-07-28 11:27:45 +02:00
Hammed Abass	2d7982bbb9	ci: add coordinated release pipeline	2026-07-28 11:09:53 +02:00
Hammed Abass	52d4102308	Merge pull request #34 from sudosylabs/feat/unified-versioning feat(release): unify cross-platform versioning	2026-07-28 08:45:02 +02:00
Hammed Abass	407a0d2d60	feat(release): unify cross-platform versioning	2026-07-28 08:22:58 +02:00