diff --git a/.github/workflows/release-tamagotchi-steam.yml b/.github/workflows/release-tamagotchi-steam.yml
new file mode 100644
index 000000000..4bc439438
--- /dev/null
+++ b/.github/workflows/release-tamagotchi-steam.yml
@@ -0,0 +1,281 @@
+name: Release Tamagotchi to Steam
+
+permissions:
+  contents: read
+  actions: read
+
+on:
+  release:
+    types:
+      - prereleased
+  workflow_dispatch:
+    inputs:
+      upload_to_steam:
+        description: Upload the completed build to Steam
+        required: true
+        default: false
+        type: boolean
+      release_branch:
+        description: Steam branch to set live
+        required: true
+        default: internal-test
+        type: string
+      build_description:
+        description: Optional Steam build description
+        required: false
+        type: string
+
+concurrency:
+  group: steam-deploy-tamagotchi-${{ github.event_name == 'workflow_dispatch' && inputs.release_branch || 'internal-test' }}
+  cancel-in-progress: false
+
+jobs:
+  build:
+    name: Build ${{ matrix.depot }} depot
+    runs-on: ${{ matrix.os }}
+    env:
+      VITE_DISTRIBUTION: steam
+      VITE_DISABLE_CUSTOM_PROVIDERS: 'true'
+      VITE_DISABLE_FLUX_PURCHASE: 'true'
+      VITE_ENABLE_POSTHOG: 'false'
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - depot: windows
+            os: windows-latest
+            builder-args: --windows --x64
+            arch: x64
+
+          - depot: macos
+            os: macos-26
+            builder-args: --macos --arm64
+            arch: arm64
+
+          - depot: linux
+            os: ubuntu-latest
+            builder-args: --linux --x64
+            arch: x64
+
+    steps:
+      # The Linux desktop build needs more space than the default hosted runner provides.
+      - name: Free Linux disk space
+        if: matrix.depot == 'linux'
+        uses: jlumbroso/free-disk-space@54081f138730dfa15788a46383842cd2f914a1be # v1.3.1
+
+      - uses: actions/checkout@v6
+
+      - name: Select Xcode 26.2
+        if: matrix.depot == 'macos'
+        run: |
+          sudo xcode-select -s /Applications/Xcode_26.2.app
+          xcodebuild -version
+
+      - name: Show macOS toolchain
+        if: matrix.depot == 'macos'
+        run: |
+          xcodebuild -version
+          actool --version
+
+      - uses: pnpm/action-setup@v4
+        with:
+          run_install: false
+
+      - name: Install macOS system dependencies for node-canvas
+        if: matrix.depot == 'macos'
+        run: brew install pkg-config cairo pango jpeg giflib librsvg
+
+      - uses: actions/setup-node@v6
+        with:
+          node-version: lts/*
+          cache: pnpm
+
+      - run: pnpm install --frozen-lockfile
+
+      - run: pnpm run build:packages
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: '10.0.x'
+
+      - name: Setup Godot
+        uses: chickensoft-games/setup-godot@v2
+        with:
+          version: '4.7.1'
+          use-dotnet: true
+          include-templates: true
+
+      - name: Export Godot Stage for Windows
+        if: matrix.depot == 'windows'
+        working-directory: ./engines/stage-tamagotchi-godot
+        shell: bash
+        run: |
+          mkdir -p out/win
+          godot --headless --export-release "Windows Desktop" out/win/godot-stage.exe
+
+      - name: Export Godot Stage for macOS
+        if: matrix.depot == 'macos'
+        working-directory: ./engines/stage-tamagotchi-godot
+        run: |
+          mkdir -p out/mac
+          godot --headless --export-release "macOS" out/mac/godot-stage.app
+
+      - name: Clean Godot Stage for Steam on macOS
+        if: matrix.depot == 'macos'
+        working-directory: ./engines/stage-tamagotchi-godot
+        run: |
+          # NOTICE:
+          # SteamPipe excludes *.pdb files after Electron signs the parent app.
+          # Removing Godot debug symbols and AppleDouble files before signing keeps macOS sealed resources aligned with the installed bundle.
+          # Source/context: Steam internal-test BuildID 24160350 and the game-ci SteamPipe FileExclusion "*.pdb" behavior.
+          # Removal condition: SteamPipe preserves these resources or the embedded Godot bundle no longer contains them.
+          find out/mac/godot-stage.app -name '*.pdb' -delete
+          find out/mac/godot-stage.app -name '._*' -delete
+
+      - name: Export Godot Stage for Linux
+        if: matrix.depot == 'linux'
+        working-directory: ./engines/stage-tamagotchi-godot
+        run: |
+          mkdir -p out/linux
+          godot --headless --export-release "Linux ${{ matrix.arch }}" out/linux/godot-stage
+
+      - name: Build Windows app
+        if: matrix.depot == 'windows'
+        run: pnpm run -F @proj-airi/stage-tamagotchi build && pnpm -F @proj-airi/stage-tamagotchi exec electron-builder build ${{ matrix.builder-args }} --publish=never
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build macOS app
+        if: matrix.depot == 'macos'
+        run: |
+          echo "$CSC_CONTENT" | base64 --decode > apps/stage-tamagotchi/apple-developer-code-signing.p12
+          export CSC_LINK="./apple-developer-code-signing.p12"
+          pnpm run -F @proj-airi/stage-tamagotchi build
+          pnpm -F @proj-airi/stage-tamagotchi exec electron-builder build ${{ matrix.builder-args }} --publish=never
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          CSC_CONTENT: ${{ secrets.CSC_CONTENT }}
+          CSC_KEY_PASSWORD: ${{ secrets.CSC_KEY_PASSWORD }}
+          APPLE_ID: ${{ secrets.APPLE_DEVELOPER_APPLE_ID }}
+          APPLE_APP_SPECIFIC_PASSWORD: ${{ secrets.APPLE_DEVELOPER_APPLE_APP_SPECIFIC_PASSWORD }}
+          APPLE_TEAM_ID: ${{ secrets.APPLE_DEVELOPER_TEAM_ID }}
+
+      - name: Build Linux app
+        if: matrix.depot == 'linux'
+        run: pnpm run -F @proj-airi/stage-tamagotchi build && pnpm -F @proj-airi/stage-tamagotchi exec electron-builder build ${{ matrix.builder-args }} --publish=never
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Package Windows depot
+        if: matrix.depot == 'windows'
+        shell: pwsh
+        run: |
+          New-Item -ItemType Directory -Force steam-content/windows | Out-Null
+          Copy-Item apps/stage-tamagotchi/dist/win-unpacked/* steam-content/windows -Recurse -Force
+          tar -cf steam-content-windows.tar -C steam-content windows
+
+      - name: Package macOS depot
+        if: matrix.depot == 'macos'
+        run: |
+          app_path="apps/stage-tamagotchi/dist/mac-arm64/AIRI.app"
+          if [[ ! -d "$app_path" ]]; then
+            echo "::error::No macOS app bundle was produced."
+            exit 1
+          fi
+
+          mkdir -p steam-content/macos
+          ditto --norsrc "$app_path" steam-content/macos/AIRI.app
+          find steam-content/macos -name '._*' -delete
+          COPYFILE_DISABLE=1 tar -cf steam-content-macos.tar -C steam-content macos
+
+      - name: Package Linux depot
+        if: matrix.depot == 'linux'
+        run: |
+          mkdir -p steam-content/linux
+          cp -a apps/stage-tamagotchi/dist/linux-unpacked/. steam-content/linux/
+          tar -cf steam-content-linux.tar -C steam-content linux
+
+      - name: Upload depot artifact
+        uses: actions/upload-artifact@v7
+        with:
+          name: steam-content-${{ matrix.depot }}
+          path: steam-content-${{ matrix.depot }}.tar
+          if-no-files-found: error
+          overwrite: true
+
+  deploy:
+    name: Upload to Steam
+    if: ${{ github.event_name == 'release' || inputs.upload_to_steam }}
+    needs: build
+    runs-on: ubuntu-latest
+    env:
+      STEAM_APP_ID: '3885340'
+      STEAM_DEBUG_BRANCH: 'false'
+      STEAM_RELEASE_BRANCH: ${{ github.event_name == 'workflow_dispatch' && inputs.release_branch || 'internal-test' }}
+      STEAM_WINDOWS_DEPOT_ID: '3885342'
+    steps:
+      - name: Validate Steam branch
+        env:
+          RELEASE_BRANCH: ${{ env.STEAM_RELEASE_BRANCH }}
+        run: |
+          if [[ ! "$RELEASE_BRANCH" =~ ^[A-Za-z0-9._-]+$ ]]; then
+            echo "::error::Steam release branch may contain only letters, numbers, dots, underscores, and hyphens."
+            exit 1
+          fi
+
+          if [[ "$RELEASE_BRANCH" == "default" ]]; then
+            echo '::error::Steam release branch "default" must be promoted manually.'
+            exit 1
+          fi
+
+      - name: Normalize Steam build description
+        id: metadata
+        uses: actions/github-script@v9
+        env:
+          INPUT_BUILD_DESCRIPTION: ${{ inputs.build_description }}
+          RELEASE_TAG: ${{ github.event.release.tag_name }}
+        with:
+          result-encoding: string
+          script: |
+            const source = process.env.RELEASE_TAG || process.env.GITHUB_SHA
+            const fallback = `AIRI ${source} Steam candidate`
+            const normalizedDescription = (process.env.INPUT_BUILD_DESCRIPTION || fallback)
+              .replace(/[\r\n\t]+/g, ' ')
+              .replace(/[\u0000-\u001f\u007f]+/g, ' ')
+              .replaceAll('\\', '/')
+              .replaceAll('"', "'")
+              .replace(/ {2,}/g, ' ')
+              .trim()
+              .slice(0, 512)
+
+            return normalizedDescription || fallback
+
+      - name: Download Steam depots
+        uses: actions/download-artifact@v5
+        with:
+          pattern: steam-content-*
+          path: steam-artifacts
+          merge-multiple: true
+
+      - name: Prepare Steam upload root
+        run: |
+          mkdir -p steam-build
+          tar -xf steam-artifacts/steam-content-windows.tar -C steam-build
+          tar -xf steam-artifacts/steam-content-macos.tar -C steam-build
+          tar -xf steam-artifacts/steam-content-linux.tar -C steam-build
+
+      - name: Deploy desktop builds to Steam
+        uses: game-ci/steam-deploy@v3.2.0
+        with:
+          username: ${{ secrets.STEAM_USERNAME }}
+          configVdf: ${{ secrets.STEAM_CONFIG_VDF }}
+          appId: ${{ env.STEAM_APP_ID }}
+          firstDepotIdOverride: ${{ env.STEAM_WINDOWS_DEPOT_ID }}
+          buildDescription: ${{ steps.metadata.outputs.result }}
+          rootPath: steam-build
+          depot1Path: windows
+          depot2Path: macos
+          depot3Path: linux
+          releaseBranch: ${{ env.STEAM_RELEASE_BRANCH }}
+          debugBranch: ${{ env.STEAM_DEBUG_BRANCH }}
diff --git a/apps/stage-tamagotchi/src/main/index.ts b/apps/stage-tamagotchi/src/main/index.ts
index 4f6a148eb..e1bacb7cb 100644
--- a/apps/stage-tamagotchi/src/main/index.ts
+++ b/apps/stage-tamagotchi/src/main/index.ts
@@ -136,6 +136,7 @@ app.whenReady().then(async () => {
   const autoUpdater = injeca.provide('services:auto-updater', {
     dependsOn: { appConfig },
     build: ({ dependsOn }) => setupAutoUpdater({
+      enabled: import.meta.env.VITE_DISTRIBUTION !== 'steam',
       getStoredUpdateLane: () => dependsOn.appConfig.get()?.updateChannel,
       setStoredUpdateLane: (lane) => {
         const currentConfig = dependsOn.appConfig.get()
diff --git a/apps/stage-tamagotchi/src/main/services/electron/auto-updater.test.ts b/apps/stage-tamagotchi/src/main/services/electron/auto-updater.test.ts
index 48254d965..03e14815f 100644
--- a/apps/stage-tamagotchi/src/main/services/electron/auto-updater.test.ts
+++ b/apps/stage-tamagotchi/src/main/services/electron/auto-updater.test.ts
@@ -177,6 +177,24 @@ describe('setupAutoUpdater', () => {
     expect(fetchSpy).not.toHaveBeenCalled()
   })
 
+  // https://github.com/moeru-ai/airi/pull/1827
+  it('keeps storefront-managed distributions outside the GitHub updater flow (PR #1827)', async () => {
+    const fetchSpy = mockGitHubReleasesFetch()
+    const { setupAutoUpdater } = await import('./auto-updater')
+    const service = setupAutoUpdater({ enabled: false })
+
+    await service.checkForUpdates()
+    await service.downloadUpdate()
+    await service.quitAndInstall()
+
+    expect(service.state.status).toBe('disabled')
+    expect(fetchSpy).not.toHaveBeenCalled()
+    expect(updaterState.instance.on).not.toHaveBeenCalled()
+    expect(updaterState.instance.checkForUpdates).not.toHaveBeenCalled()
+    expect(updaterState.instance.downloadUpdate).not.toHaveBeenCalled()
+    expect(updaterState.instance.quitAndInstall).not.toHaveBeenCalled()
+  })
+
   it('supports explicit stable lane selection for future dynamic channel switching', async () => {
     process.env.AIRI_UPDATE_CHANNEL = 'stable'
     mockGitHubReleasesFetch([
diff --git a/apps/stage-tamagotchi/src/main/services/electron/auto-updater.ts b/apps/stage-tamagotchi/src/main/services/electron/auto-updater.ts
index cb21c32e1..513a6f298 100644
--- a/apps/stage-tamagotchi/src/main/services/electron/auto-updater.ts
+++ b/apps/stage-tamagotchi/src/main/services/electron/auto-updater.ts
@@ -260,7 +260,15 @@ export interface AutoUpdater {
 }
 
 export interface AutoUpdaterOptions {
+  /**
+   * Whether AIRI owns application updates for this distribution.
+   *
+   * @default true
+   */
+  enabled?: boolean
+  /** Reads the release channel persisted by the application configuration. */
   getStoredUpdateLane?: () => UpdateLane | undefined
+  /** Persists a release-channel change requested through updater IPC. */
   setStoredUpdateLane?: (lane: UpdateLane | undefined) => void
 }
 
@@ -268,7 +276,39 @@ function isPrereleaseVersion(version: string) {
   return (semver.prerelease(version)?.length ?? 0) > 0
 }
 
+/**
+ * Preserves the updater IPC contract when the storefront owns application updates.
+ *
+ * No method reaches Electron Updater or a release feed, while preference reads and
+ * subscriptions remain available to existing renderer consumers.
+ */
+function createDisabledAutoUpdater(options: AutoUpdaterOptions): AutoUpdater {
+  const state: AutoUpdaterState = { status: 'disabled' }
+  let storedPreferredLane = options.getStoredUpdateLane?.()
+
+  return {
+    state,
+    async checkForUpdates() {},
+    async downloadUpdate() {},
+    async quitAndInstall() {},
+    getPreferredUpdateLane() {
+      return storedPreferredLane
+    },
+    async setPreferredUpdateLane(lane) {
+      storedPreferredLane = lane
+      options.setStoredUpdateLane?.(lane)
+    },
+    subscribe(callback) {
+      callback(state)
+      return () => {}
+    },
+  }
+}
+
 export function setupAutoUpdater(options: AutoUpdaterOptions = {}): AutoUpdater {
+  if (options.enabled === false)
+    return createDisabledAutoUpdater(options)
+
   const semaphore = new Semaphore(1)
   const appVersion = app.getVersion()
   const isPrereleaseBuild = isPrereleaseVersion(appVersion)
diff --git a/apps/stage-tamagotchi/src/renderer/pages/about.vue b/apps/stage-tamagotchi/src/renderer/pages/about.vue
index 3e60d80ab..505ebb580 100644
--- a/apps/stage-tamagotchi/src/renderer/pages/about.vue
+++ b/apps/stage-tamagotchi/src/renderer/pages/about.vue
@@ -39,6 +39,7 @@ const {
 } = useAnalytics()
 
 const isDisabled = computed(() => updateState.value.status === 'disabled')
+const isStoreManaged = import.meta.env.VITE_DISTRIBUTION === 'steam'
 const isLatestVersion = computed(() => {
   return updateState.value.status === 'not-available' && !isDisabled.value
 })
@@ -279,6 +280,7 @@ onMounted(() => {
             </div>
 
             <FieldSelect
+              v-if="!isStoreManaged"
               :model-value="selectedUpdateChannel"
               :disabled="isUpdateChannelUpdating || isBusy"
               :label="t('tamagotchi.stage.about.update.lane.label')"
@@ -390,7 +392,9 @@ onMounted(() => {
                       : isLatestVersion
                         ? t('tamagotchi.stage.about.update.actions.latest-version')
                         : isDisabled
-                          ? t('tamagotchi.stage.about.update.actions.disabled-dev')
+                          ? t(isStoreManaged
+                            ? 'tamagotchi.stage.about.update.actions.managed-by-store'
+                            : 'tamagotchi.stage.about.update.actions.disabled-dev')
                           : isError
                             ? t('tamagotchi.stage.about.update.actions.retry-check')
                             : t('tamagotchi.stage.about.update.actions.check-for-updates')"
diff --git a/packages/i18n/src/locales/en/tamagotchi/stage.yaml b/packages/i18n/src/locales/en/tamagotchi/stage.yaml
index f3cf31c41..7c5087e88 100644
--- a/packages/i18n/src/locales/en/tamagotchi/stage.yaml
+++ b/packages/i18n/src/locales/en/tamagotchi/stage.yaml
@@ -94,6 +94,7 @@ about:
       checking: Checking...
       latest-version: Latest version
       disabled-dev: Updates disabled in Dev
+      managed-by-store: Updates managed by your app store
       retry-check: Retry Check
       restart-silent: Restart to update silently
       restart-install: Restart to install update
diff --git a/packages/i18n/src/locales/es/tamagotchi/stage.yaml b/packages/i18n/src/locales/es/tamagotchi/stage.yaml
index c4a0fdb79..b787348ea 100644
--- a/packages/i18n/src/locales/es/tamagotchi/stage.yaml
+++ b/packages/i18n/src/locales/es/tamagotchi/stage.yaml
@@ -91,6 +91,7 @@ about:
       checking: Verificando...
       latest-version: Última versión
       disabled-dev: Actualizaciones desactivadas en Dev
+      managed-by-store: Las actualizaciones se gestionan desde la tienda de aplicaciones
       retry-check: Reintentar verificación
       restart-silent: Reiniciar para actualizar silenciosamente
       restart-install: Reiniciar e instalar actualización
diff --git a/packages/i18n/src/locales/fr/tamagotchi/stage.yaml b/packages/i18n/src/locales/fr/tamagotchi/stage.yaml
index 958269c93..935266083 100644
--- a/packages/i18n/src/locales/fr/tamagotchi/stage.yaml
+++ b/packages/i18n/src/locales/fr/tamagotchi/stage.yaml
@@ -91,6 +91,7 @@ about:
       checking: Vérification en cours...
       latest-version: Dernière version
       disabled-dev: Mises à jour désactivées en développement
+      managed-by-store: Les mises à jour sont gérées par la boutique d’applications
       retry-check: Réessayer la vérification
       restart-silent: Redémarrer pour mettre à jour silencieusement
       restart-install: Redémarrez pour installer la mise à jour
diff --git a/packages/i18n/src/locales/ja/tamagotchi/stage.yaml b/packages/i18n/src/locales/ja/tamagotchi/stage.yaml
index 8ab6efdac..3efe8293a 100644
--- a/packages/i18n/src/locales/ja/tamagotchi/stage.yaml
+++ b/packages/i18n/src/locales/ja/tamagotchi/stage.yaml
@@ -91,6 +91,7 @@ about:
       checking: 確認中…
       latest-version: 最新バージョン
       disabled-dev: Updates disabled in Dev
+      managed-by-store: アップデートはアプリストアによって管理されています
       retry-check: Retry Check
       restart-silent: Restart to update silently
       restart-install: 再起動してアップデートをインストールする
diff --git a/packages/i18n/src/locales/ko/tamagotchi/stage.yaml b/packages/i18n/src/locales/ko/tamagotchi/stage.yaml
index 61bb7cdf9..0e56041a5 100644
--- a/packages/i18n/src/locales/ko/tamagotchi/stage.yaml
+++ b/packages/i18n/src/locales/ko/tamagotchi/stage.yaml
@@ -91,6 +91,7 @@ about:
       checking: 확인 중...
       latest-version: 최신 버전
       disabled-dev: Updates disabled in Dev
+      managed-by-store: 업데이트는 앱 스토어에서 관리됩니다
       retry-check: 다시 확인하기
       restart-silent: 재 시작 후 조용히 업데이트하기
       restart-install: 재시작 후 업데이트하기
diff --git a/packages/i18n/src/locales/ru/tamagotchi/stage.yaml b/packages/i18n/src/locales/ru/tamagotchi/stage.yaml
index cfc186516..11f8f3161 100644
--- a/packages/i18n/src/locales/ru/tamagotchi/stage.yaml
+++ b/packages/i18n/src/locales/ru/tamagotchi/stage.yaml
@@ -91,6 +91,7 @@ about:
       checking: Проверка...
       latest-version: Последняя версия
       disabled-dev: Обновления отключены в Dev
+      managed-by-store: Обновления управляются магазином приложений
       retry-check: Повторить проверку
       restart-silent: Перезапустите, чтобы обновить автоматически
       restart-install: Перезапустите для установки обновления
diff --git a/packages/i18n/src/locales/vi/tamagotchi/stage.yaml b/packages/i18n/src/locales/vi/tamagotchi/stage.yaml
index 504f2d44f..fd52c1a34 100644
--- a/packages/i18n/src/locales/vi/tamagotchi/stage.yaml
+++ b/packages/i18n/src/locales/vi/tamagotchi/stage.yaml
@@ -91,6 +91,7 @@ about:
       checking: Đang kiểm tra...
       latest-version: Phiên bản mới nhất
       disabled-dev: Các bản cập nhật bị vô hiệu trong Dev
+      managed-by-store: Bản cập nhật do cửa hàng ứng dụng quản lý
       retry-check: Retry Check
       restart-silent: Khởi động lại để cập nhật trong im lặng
       restart-install: Khởi động lại để tải bản cập nhật
diff --git a/packages/i18n/src/locales/zh-Hans/tamagotchi/stage.yaml b/packages/i18n/src/locales/zh-Hans/tamagotchi/stage.yaml
index 745b26f77..a8b3c357e 100644
--- a/packages/i18n/src/locales/zh-Hans/tamagotchi/stage.yaml
+++ b/packages/i18n/src/locales/zh-Hans/tamagotchi/stage.yaml
@@ -91,6 +91,7 @@ about:
       checking: 正在检查...
       latest-version: 最新版本
       disabled-dev: 已禁用开发环境时的更新
+      managed-by-store: 更新由应用商店管理
       retry-check: 重新检查
       restart-silent: 重新启动以静默更新
       restart-install: 重启并安装更新
diff --git a/packages/i18n/src/locales/zh-Hant/tamagotchi/stage.yaml b/packages/i18n/src/locales/zh-Hant/tamagotchi/stage.yaml
index c0dac0eaf..4eed3b4e7 100644
--- a/packages/i18n/src/locales/zh-Hant/tamagotchi/stage.yaml
+++ b/packages/i18n/src/locales/zh-Hant/tamagotchi/stage.yaml
@@ -91,6 +91,7 @@ about:
       checking: Checking...
       latest-version: Latest version
       disabled-dev: Updates disabled in Dev
+      managed-by-store: 更新由應用程式商店管理
       retry-check: Retry Check
       restart-silent: Restart to update silently
       restart-install: Restart to install update
diff --git a/vite-env.d.ts b/vite-env.d.ts
index 27e806e4b..193a95051 100644
--- a/vite-env.d.ts
+++ b/vite-env.d.ts
@@ -1,6 +1,7 @@
 /// <reference types="vite/client" />
 
 interface ImportMetaEnv {
+  readonly VITE_DISTRIBUTION?: 'direct' | 'steam'
   readonly VITE_DISABLE_FLUX_PURCHASE?: string
   readonly VITE_DISABLE_CUSTOM_PROVIDERS?: string
   readonly VITE_ENABLE_POSTHOG?: string