diff --git a/.gitignore b/.gitignore
index 3c2d917..405c589 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,6 +9,10 @@ Package.resolved
 # Xcode
 DerivedData/
 build/
+# A-6: generated by `xcodegen generate` from project.yml (the source of truth). Regenerate, don't commit.
+*.xcodeproj/
+Support/Info.plist
+Support/DSApp.entitlements
 *.xcodeproj/project.xcworkspace/xcuserdata/
 *.xcodeproj/xcuserdata/
 *.xcworkspace/xcuserdata/
diff --git a/Sources/DSApp/DSApp.swift b/App/DSApp.swift
similarity index 100%
rename from Sources/DSApp/DSApp.swift
rename to App/DSApp.swift
diff --git a/Package.swift b/Package.swift
index b4b6a1b..f73f6cd 100644
--- a/Package.swift
+++ b/Package.swift
@@ -7,7 +7,13 @@
 // It is also exposed as a library product so a future separate app package could depend on it.
 //
 // Ownership boundary unchanged: S2 owns Sources/AI/** + Tests/AITests/**; S3 owns DSKit / AppFeature
-// / DSApp / Tests/DSKitTests. S3 consumes AIFabric read-only.
+// / Tests/DSKitTests. S3 consumes AIFabric read-only.
+//
+// A-6 (Xcode .app target via xcodegen): the runnable macOS app shell lives in App/DSApp.swift, owned
+// by the xcodegen "DSApp" application target (project.yml), NOT by SPM. SPM here builds only the
+// libraries + tests, so `swift build` / `swift test` stay backend-free and the executable lives in
+// the real .app bundle (Info.plist + entitlements) where Cmd+R actually opens a window. The App
+// target depends on the AppFeature library product below.
 import PackageDescription
 
 let package = Package(
@@ -17,6 +23,8 @@ let package = Package(
     ],
     products: [
         .library(name: "AIFabric", targets: ["AIFabric"]),
+        // Consumed by the xcodegen "DSApp" .app target (App/DSApp.swift).
+        .library(name: "AppFeature", targets: ["AppFeature"]),
     ],
     targets: [
         .target(
@@ -34,11 +42,6 @@ let package = Package(
             dependencies: ["DSKit", "AIFabric"],
             swiftSettings: [.swiftLanguageMode(.v6)]
         ),
-        .executableTarget(
-            name: "DSApp",
-            dependencies: ["AppFeature"],
-            swiftSettings: [.swiftLanguageMode(.v6)]
-        ),
         .testTarget(
             name: "DSKitTests",
             dependencies: ["DSKit", "AIFabric"],
diff --git a/project.yml b/project.yml
new file mode 100644
index 0000000..ba780af
--- /dev/null
+++ b/project.yml
@@ -0,0 +1,76 @@
+# A-6 — real macOS .app target for the DS app shell.
+#
+# Why this exists: opening Package.swift directly in Xcode produced an *executable* SwiftPM target
+# with no .app bundle / Info.plist, so macOS treated it as an accessory and Cmd+R never opened a
+# window (see ds-native-app-program memory). This generates a proper application target whose @main
+# lives in App/DSApp.swift and which links the AppFeature library product from the local SwiftPM
+# package. project.yml is the source of truth; DSApp.xcodeproj + Support/*.plist|.entitlements are
+# generated artifacts (gitignored). Regenerate with: xcodegen generate
+name: DSApp
+options:
+  bundleIdPrefix: net.hyungi
+  deploymentTarget:
+    macOS: "26.0"
+  createIntermediateGroups: true
+  minimumXcodeGenVersion: "2.40.0"
+
+settings:
+  base:
+    SWIFT_VERSION: "6.0"               # Swift 6 language mode (matches package .swiftLanguageMode(.v6))
+    SWIFT_STRICT_CONCURRENCY: complete
+    MACOSX_DEPLOYMENT_TARGET: "26.0"
+    CODE_SIGN_STYLE: Automatic
+    # Local dev: no signing identity needed to build/run on this Mac.
+    CODE_SIGNING_ALLOWED: "NO"
+    CODE_SIGNING_REQUIRED: "NO"
+
+packages:
+  # Local SwiftPM package = this repo (Package.swift): AIFabric + DSKit + AppFeature libraries.
+  DSPackage:
+    path: .
+
+targets:
+  DSApp:
+    type: application
+    platform: macOS
+    deploymentTarget: "26.0"
+    sources:
+      - path: App          # App/DSApp.swift only — @main window + DI shell
+    dependencies:
+      - package: DSPackage
+        product: AppFeature
+    settings:
+      base:
+        PRODUCT_BUNDLE_IDENTIFIER: net.hyungi.dsapp
+        PRODUCT_NAME: DS
+        GENERATE_INFOPLIST_FILE: "NO"
+        MARKETING_VERSION: "0.1"
+        CURRENT_PROJECT_VERSION: "1"
+        ENABLE_HARDENED_RUNTIME: "YES"
+    info:
+      path: Support/Info.plist
+      properties:
+        CFBundleName: DS
+        CFBundleDisplayName: DS
+        CFBundleShortVersionString: "0.1"
+        CFBundleVersion: "1"
+        CFBundlePackageType: APPL
+        LSMinimumSystemVersion: "26.0"
+        LSApplicationCategoryType: public.app-category.productivity
+        NSHumanReadableCopyright: ""
+    entitlements:
+      path: Support/DSApp.entitlements
+      properties:
+        com.apple.security.app-sandbox: true
+        com.apple.security.network.client: true                 # LiveDSClient HTTP → DS / mac mini :8890
+        com.apple.security.files.user-selected.read-write: true # FU-C upload / FU-D download save
+
+schemes:
+  DSApp:
+    build:
+      targets:
+        DSApp: all
+    run:
+      config: Debug
+    test:
+      config: Debug