diff --git a/elixirkit/demo/rel/swiftui/Demo.xcodeproj/project.pbxproj b/elixirkit/demo/rel/swiftui/Demo.xcodeproj/project.pbxproj
index a07fa4989..480f6f47f 100644
--- a/elixirkit/demo/rel/swiftui/Demo.xcodeproj/project.pbxproj
+++ b/elixirkit/demo/rel/swiftui/Demo.xcodeproj/project.pbxproj
@@ -13,6 +13,7 @@
 		2E7CBC1E2A3B3343001253E3 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2E7CBC0C2A3B3340001253E3 /* ContentView.swift */; };
 		2E7CBC1F2A3B3343001253E3 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 2E7CBC0D2A3B3343001253E3 /* Assets.xcassets */; };
 		2E7CBC202A3B3343001253E3 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 2E7CBC0D2A3B3343001253E3 /* Assets.xcassets */; };
+		2E951DDB2A3B507700C64042 /* ElixirKit in Frameworks */ = {isa = PBXBuildFile; productRef = 2E951DDA2A3B507700C64042 /* ElixirKit */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -22,6 +23,7 @@
 		2E7CBC122A3B3343001253E3 /* Demo.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Demo.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		2E7CBC182A3B3343001253E3 /* Demo.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Demo.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		2E7CBC1A2A3B3343001253E3 /* macOS.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = macOS.entitlements; sourceTree = "<group>"; };
+		2E951DD82A3B502900C64042 /* elixirkit_swift */ = {isa = PBXFileReference; lastKnownFileType = wrapper; name = elixirkit_swift; path = ../../../elixirkit_swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -36,6 +38,7 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				2E951DDB2A3B507700C64042 /* ElixirKit in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -45,9 +48,11 @@
 		2E7CBC052A3B3340001253E3 = {
 			isa = PBXGroup;
 			children = (
+				2E951DD72A3B502900C64042 /* Packages */,
 				2E7CBC0A2A3B3340001253E3 /* Shared */,
 				2E7CBC192A3B3343001253E3 /* macOS */,
 				2E7CBC132A3B3343001253E3 /* Products */,
+				2E951DD92A3B507700C64042 /* Frameworks */,
 			);
 			sourceTree = "<group>";
 		};
@@ -78,6 +83,21 @@
 			path = macOS;
 			sourceTree = "<group>";
 		};
+		2E951DD72A3B502900C64042 /* Packages */ = {
+			isa = PBXGroup;
+			children = (
+				2E951DD82A3B502900C64042 /* elixirkit_swift */,
+			);
+			name = Packages;
+			sourceTree = "<group>";
+		};
+		2E951DD92A3B507700C64042 /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
@@ -112,6 +132,9 @@
 			dependencies = (
 			);
 			name = "Demo (macOS)";
+			packageProductDependencies = (
+				2E951DDA2A3B507700C64042 /* ElixirKit */,
+			);
 			productName = "Demo (macOS)";
 			productReference = 2E7CBC182A3B3343001253E3 /* Demo.app */;
 			productType = "com.apple.product-type.application";
@@ -124,7 +147,7 @@
 			attributes = {
 				BuildIndependentTargetsInParallel = 1;
 				LastSwiftUpdateCheck = 1320;
-				LastUpgradeCheck = 1320;
+				LastUpgradeCheck = 1430;
 				TargetAttributes = {
 					2E7CBC112A3B3343001253E3 = {
 						CreatedOnToolsVersion = 13.2.1;
@@ -175,6 +198,7 @@
 /* Begin PBXShellScriptBuildPhase section */
 		2E24F3522A3B3CFD0056A207 /* ShellScript */ = {
 			isa = PBXShellScriptBuildPhase;
+			alwaysOutOfDate = 1;
 			buildActionMask = 2147483647;
 			files = (
 			);
@@ -248,6 +272,7 @@
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
+				DEAD_CODE_STRIPPING = YES;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
@@ -307,6 +332,7 @@
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
+				DEAD_CODE_STRIPPING = YES;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
@@ -393,6 +419,7 @@
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
 				CURRENT_PROJECT_VERSION = 1;
+				DEAD_CODE_STRIPPING = YES;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_KEY_NSHumanReadableCopyright = "";
@@ -419,6 +446,7 @@
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
 				CURRENT_PROJECT_VERSION = 1;
+				DEAD_CODE_STRIPPING = YES;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_KEY_NSHumanReadableCopyright = "";
@@ -467,6 +495,13 @@
 			defaultConfigurationName = Release;
 		};
 /* End XCConfigurationList section */
+
+/* Begin XCSwiftPackageProductDependency section */
+		2E951DDA2A3B507700C64042 /* ElixirKit */ = {
+			isa = XCSwiftPackageProductDependency;
+			productName = ElixirKit;
+		};
+/* End XCSwiftPackageProductDependency section */
 	};
 	rootObject = 2E7CBC062A3B3340001253E3 /* Project object */;
 }
diff --git a/elixirkit/demo/rel/swiftui/Shared/DemoApp.swift b/elixirkit/demo/rel/swiftui/Shared/DemoApp.swift
index 470184c6a..58c671ea5 100644
--- a/elixirkit/demo/rel/swiftui/Shared/DemoApp.swift
+++ b/elixirkit/demo/rel/swiftui/Shared/DemoApp.swift
@@ -1,7 +1,17 @@
 import SwiftUI
+import ElixirKit
 
 @main
 struct DemoApp: App {
+    init() {
+        ElixirKit.API.start(
+            name: "demo",
+            readyHandler: {
+//                ElixirKit.API.publish("log", "Hello from SwiftUI!")
+            }
+        )
+    }
+
     var body: some Scene {
         WindowGroup {
             ContentView()
diff --git a/elixirkit/demo/rel/swiftui/build_release.sh b/elixirkit/demo/rel/swiftui/build_release.sh
index 49f7a986e..e5698f60d 100755
--- a/elixirkit/demo/rel/swiftui/build_release.sh
+++ b/elixirkit/demo/rel/swiftui/build_release.sh
@@ -1,4 +1,14 @@
 #!/bin/sh
 set -euo pipefail
 
-(cd ../.. && mix release --overwrite)
+# this script is executed by Xcode.
+
+if ! which elixir; then
+  if [ -d /opt/homebrew/opt/asdf ]; then
+    . /opt/homebrew/opt/asdf/libexec/asdf.sh
+  fi
+fi
+
+app_dir=$BUILT_PRODUCTS_DIR/$FULL_PRODUCT_NAME
+resources_dir=$app_dir/Contents/Resources
+(cd ../.. && mix release --overwrite --path=$resources_dir/rel)
diff --git a/elixirkit/demo/rel/swiftui/run_macos.sh b/elixirkit/demo/rel/swiftui/run_macos.sh
index a7facf817..74406540f 100755
--- a/elixirkit/demo/rel/swiftui/run_macos.sh
+++ b/elixirkit/demo/rel/swiftui/run_macos.sh
@@ -9,4 +9,6 @@ mkdir -p tmp
 xcodebuild -configuration "$configuration" -scheme "$scheme" -destination "$destination" -showBuildSettings -json > tmp/build.json
 app_dir=`cat tmp/build.json | jq --raw-output '.[0].buildSettings.CODESIGNING_FOLDER_PATH'`
 
-open -W --stdout=`tty` --stderr=`tty` $app_dir
+xcodebuild -configuration "$configuration" -scheme "$scheme" -destination "$destination"
+
+# open -W --stdout=`tty` --stderr=`tty` $app_dir