Initial commit

GreenshotMac/App/main.swift

@@ -0,0 +1,25 @@
+//  main.swift
+//  GreenshotMac
+
+import AppKit
+
+/// NSApplication.delegate is a weak reference, so the delegate is held here for the
+/// lifetime of the process.
+enum AppLauncher {
+    @MainActor private static var retainedDelegate: AppDelegate?
+
+    @MainActor
+    static func launch() {
+        let application = NSApplication.shared
+        let delegate = AppDelegate()
+        retainedDelegate = delegate
+        application.delegate = delegate
+        application.setActivationPolicy(.accessory)
+        application.run()
+    }
+}
+
+// Top-level code always runs on the main thread, so assuming main actor isolation is safe here.
+MainActor.assumeIsolated {
+    AppLauncher.launch()
+}