diff --git a/.github/workflows/release-readiness.yml b/.github/workflows/release-readiness.yml
index c5d7665..d0b967b 100644
--- a/.github/workflows/release-readiness.yml
+++ b/.github/workflows/release-readiness.yml
@@ -40,3 +40,36 @@ jobs:
           xcrun simctl list runtimes
       - run: ./Scripts/release-readiness.sh
       - run: ./Scripts/ipad-icloud-tests.sh
+      - name: Report XCTest results
+        if: always()
+        run: |
+          python3 - <<'PY'
+          import glob
+          import json
+          import subprocess
+
+          for root in ("/tmp/scriptwidget-release-readiness", "/tmp/scriptwidget-ipad-icloud-tests"):
+              for path in sorted(glob.glob(f"{root}/*/Logs/Test/*.xcresult")):
+                  print(f"XCTest result: {path}", flush=True)
+                  result = subprocess.run(
+                      ["xcrun", "xcresulttool", "get", "test-results", "summary", "--path", path],
+                      capture_output=True, text=True,
+                  )
+                  if result.returncode:
+                      print(result.stderr, flush=True)
+                      continue
+                  summary = json.loads(result.stdout)
+                  print(json.dumps({key: summary.get(key) for key in (
+                      "title", "result", "passedTests", "failedTests", "skippedTests", "testFailures"
+                  )}, indent=2), flush=True)
+          PY
+      - name: Upload XCTest diagnostics
+        if: always()
+        uses: actions/upload-artifact@v7
+        with:
+          name: xctest-results-${{ github.run_attempt }}
+          path: |
+            /tmp/scriptwidget-release-readiness/*/Logs/Test/
+            /tmp/scriptwidget-ipad-icloud-tests/*/Logs/Test/
+          if-no-files-found: warn
+          retention-days: 7
diff --git a/Scripts/macos-widget-link-tests.sh b/Scripts/macos-widget-link-tests.sh
new file mode 100644
index 0000000..3b2b6ca
--- /dev/null
+++ b/Scripts/macos-widget-link-tests.sh
@@ -0,0 +1,13 @@
+#!/bin/sh
+set -eu
+
+ROOT=$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)
+TEST_DIR=$(mktemp -d /tmp/scriptwidget-link-tests.XXXXXX)
+trap 'rm -rf "$TEST_DIR"' EXIT
+
+swiftc -module-cache-path "$TEST_DIR/module-cache" \
+  "$ROOT/macOS/ScriptWidgetMac/App/AppDelegate.swift" \
+  "$ROOT/Shared/ScriptWidgetRuntime/Widget/Runtime/DeepLinkDefine.swift" \
+  "$ROOT/Tests/MacWidgetLinkTests/main.swift" \
+  -o "$TEST_DIR/widget-link-tests"
+"$TEST_DIR/widget-link-tests"
diff --git a/Scripts/release-readiness.sh b/Scripts/release-readiness.sh
index 4b246fc..b2eeb3a 100755
--- a/Scripts/release-readiness.sh
+++ b/Scripts/release-readiness.sh
@@ -13,6 +13,7 @@ git diff --exit-code -- \
   macOS/ScriptWidgetMac/StudioEditor.bundle
 
 if [ "${SCRIPTWIDGET_SKIP_XCODE:-0}" != "1" ]; then
+  sh Scripts/macos-widget-link-tests.sh
   xcodebuild -quiet -project macOS/ScriptWidgetMac.xcodeproj -scheme ScriptWidgetRuntimeTests \
     -destination 'platform=macOS' -derivedDataPath "$DERIVED_DATA/macos-tests" \
     CODE_SIGNING_ALLOWED=NO test
diff --git a/Tests/MacWidgetLinkTests/main.swift b/Tests/MacWidgetLinkTests/main.swift
new file mode 100644
index 0000000..22cb368
--- /dev/null
+++ b/Tests/MacWidgetLinkTests/main.swift
@@ -0,0 +1,32 @@
+import AppKit
+import Foundation
+
+// Isolate the app delegate from iCloud caching for this routing regression test.
+final class StubScriptManager {
+    func precacheAllScripts() {}
+}
+let sharedScriptManager = StubScriptManager()
+
+let delegate = AppDelegate()
+var openedURLs: [URL] = []
+delegate.openWidgetURL = { openedURLs.append($0) }
+
+let externalURLs = [
+    URL(string: "https://xnu.app/scriptwidget")!,
+    URL(string: "scriptable:///run/Name")!,
+    URL(fileURLWithPath: "/tmp/widget-card.html"),
+    URL(string: "mailto:example@example.com")!
+]
+let internalURLs = [
+    kDeepLinkDefaultURL,
+    URL(string: "WIDGET-DEEPLINK://default")!,
+    URL(string: "scriptwidget://open")!,
+    URL(string: "SCRIPTWIDGET://open")!,
+    URL(string: "relative/path")!
+]
+
+delegate.application(NSApplication.shared, open: internalURLs + externalURLs)
+precondition(openedURLs == externalURLs, "Forward external URLs in order and ignore internal/schemeless URLs")
+delegate.application(NSApplication.shared, open: [])
+precondition(openedURLs == externalURLs, "An empty URL batch should do nothing")
+print("✓ macOS widget URL routing passed")
diff --git a/Tests/ScriptWidgetRuntimeTests/RuntimeExecutionTests.swift b/Tests/ScriptWidgetRuntimeTests/RuntimeExecutionTests.swift
index 6051f00..f414258 100644
--- a/Tests/ScriptWidgetRuntimeTests/RuntimeExecutionTests.swift
+++ b/Tests/ScriptWidgetRuntimeTests/RuntimeExecutionTests.swift
@@ -260,7 +260,16 @@ final class RuntimeExecutionTests: XCTestCase {
         }
     }
 
-    func testConcurrentRuntimesKeepEnvironmentStateIsolated() {
+    func testConcurrentRuntimesKeepEnvironmentStateIsolated() throws {
+        let source = "$render(<text>{$getenv(\"widget-param\")}</text>);"
+        // Exercise concurrent environment isolation without racing eight cold
+        // Babel compilations of identical source on constrained CI simulators.
+        // Each concurrent execution still gets its own package and JSContext.
+        let warmup = makeRuntime(environments: ["widget-size": "medium", "widget-param": "warmup"])
+            .executeJSXSyncForWidget(source)
+        XCTAssertNil(warmup.1)
+        XCTAssertEqual(collectText(try XCTUnwrap(warmup.0)), "warmup")
+
         let lock = NSLock()
         var rendered: [Int: String] = [:]
         var failures: [String] = []
@@ -268,9 +277,7 @@ final class RuntimeExecutionTests: XCTestCase {
         DispatchQueue.concurrentPerform(iterations: 8) { index in
             let token = "runtime-\(index)"
             let runtime = makeRuntime(environments: ["widget-size": "medium", "widget-param": token])
-            let (element, error) = runtime.executeJSXSyncForWidget(
-                "$render(<text>{$getenv(\"widget-param\")}</text>);"
-            )
+            let (element, error) = runtime.executeJSXSyncForWidget(source)
             lock.lock()
             defer { lock.unlock() }
             if let error {
diff --git a/macOS/ScriptWidgetMac/App/AppDelegate.swift b/macOS/ScriptWidgetMac/App/AppDelegate.swift
index faa64df..546c208 100644
--- a/macOS/ScriptWidgetMac/App/AppDelegate.swift
+++ b/macOS/ScriptWidgetMac/App/AppDelegate.swift
@@ -9,6 +9,19 @@ import Foundation
 import AppKit
 
 class AppDelegate: NSObject, NSApplicationDelegate {
+    var openWidgetURL: (URL) -> Void = { url in
+        NSWorkspace.shared.open(url)
+    }
+
+    func application(_ application: NSApplication, open urls: [URL]) {
+        for url in urls {
+            guard let scheme = url.scheme?.lowercased(),
+                  scheme != kDeepLinkDefaultScheme,
+                  scheme != "scriptwidget" else { continue }
+            openWidgetURL(url)
+        }
+    }
+
     func applicationDidFinishLaunching(_ notification: Notification) {
         print("did finish launching")
         // The embedded editor is served via a WKURLSchemeHandler — no
diff --git a/macOS/ScriptWidgetMac/Create/CreateGuideView.swift b/macOS/ScriptWidgetMac/Create/CreateGuideView.swift
index 80c350b..884417c 100644
--- a/macOS/ScriptWidgetMac/Create/CreateGuideView.swift
+++ b/macOS/ScriptWidgetMac/Create/CreateGuideView.swift
@@ -136,14 +136,10 @@ struct CreateGuideView: View {
             }
         } label: {
             HStack(spacing: 12) {
-                Image(systemName: "sparkles")
-                    .font(.title)
-                    .foregroundStyle(.white)
+                Image(systemName: "sparkle")
+                    .font(.system(size: 32, weight: .light))
+                    .foregroundStyle(.primary)
                     .frame(width: 44, height: 44)
-                    .background(LinearGradient(colors: [.purple, .blue],
-                                               startPoint: .topLeading,
-                                               endPoint: .bottomTrailing))
-                    .clipShape(RoundedRectangle(cornerRadius: 10))
                 VStack(alignment: .leading, spacing: 2) {
                     Text("Generate with AI").font(.headline)
                     Text("Describe your widget and let the AI build it.")