Release v1.3.4 - Instant app hiding with event-driven detection

- Replace 2-second polling timer with NSWorkspace notifications
- Apps now hide instantly (~300ms) when launched
- Zero CPU usage when idle - only updates on app events
- Observe app launch, activate, and unhide events

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: D3OXY

CHANGELOG.md

@@ -7,6 +7,18 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.3.4] - 2024-12-21
+
+### Changed
+- **Instant app hiding**: Excluded apps now hide instantly when launched (was 2-second delay)
+- **Event-driven detection**: Replaced 2-second polling timer with NSWorkspace notifications
+- **Zero idle CPU**: No more background polling - only updates when apps actually launch/activate
+
+### Performance
+- Removed continuous 2-second timer (saves CPU when idle)
+- Uses system notifications for immediate response (~300ms after app launch)
+- More efficient than polling - only runs when needed
+
 ## [1.3.3] - 2024-12-21
 
 ### Fixed
@@ -108,6 +120,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 | Version | Date | Highlights |
 |---------|------|------------|
+| 1.3.4 | 2024-12-21 | Instant app hiding, event-driven detection, zero idle CPU |
 | 1.3.3 | 2024-12-21 | HUD above fullscreen, green menu icon, faster hotkeys |
 | 1.3.2 | 2024-12-21 | Dynamic aspect ratio, smart visibility (hidden until sharing) |
 | 1.3.1 | 2024-12-21 | Fix window sharing visibility, self-hide toggle |

Cloak/AppDelegate.swift

@@ -1416,14 +1416,60 @@ class ScreenCaptureEngine: NSObject {
     private var windowsToExclude: [NSWindow]
     private var appNamesToExclude: [String]
     private var currentDisplay: SCDisplay?
-    private var refreshTimer: Timer?
+    private var workspaceObservers: [NSObjectProtocol] = []
 
     init(previewView: PreviewView, excludingWindows: [NSWindow] = [], excludingApps: [String] = []) {
         self.previewView = previewView
         self.windowsToExclude = excludingWindows
         self.appNamesToExclude = excludingApps
         super.init()
         loadSettings()
+        setupWorkspaceObservers()
+    }
+
+    private func setupWorkspaceObservers() {
+        let center = NSWorkspace.shared.notificationCenter
+
+        // Observe app launches - refresh filter when any app launches
+        let launchObserver = center.addObserver(
+            forName: NSWorkspace.didLaunchApplicationNotification,
+            object: nil,
+            queue: .main
+        ) { [weak self] notification in
+            // Small delay to let the window appear
+            DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) {
+                self?.refreshExcludedApps()
+            }
+        }
+        workspaceObservers.append(launchObserver)
+
+        // Also observe when apps become active (window might appear)
+        let activateObserver = center.addObserver(
+            forName: NSWorkspace.didActivateApplicationNotification,
+            object: nil,
+            queue: .main
+        ) { [weak self] _ in
+            self?.refreshExcludedApps()
+        }
+        workspaceObservers.append(activateObserver)
+
+        // Observe when windows might have changed
+        let unhideObserver = center.addObserver(
+            forName: NSWorkspace.didUnhideApplicationNotification,
+            object: nil,
+            queue: .main
+        ) { [weak self] _ in
+            self?.refreshExcludedApps()
+        }
+        workspaceObservers.append(unhideObserver)
+    }
+
+    private func removeWorkspaceObservers() {
+        let center = NSWorkspace.shared.notificationCenter
+        for observer in workspaceObservers {
+            center.removeObserver(observer)
+        }
+        workspaceObservers.removeAll()
     }
 
     func loadSettings() {
@@ -1460,8 +1506,7 @@ class ScreenCaptureEngine: NSObject {
     }
 
     func stopCapture() {
-        refreshTimer?.invalidate()
-        refreshTimer = nil
+        removeWorkspaceObservers()
         Task {
             try? await stream?.stopCapture()
             stream = nil
@@ -1508,13 +1553,6 @@ class ScreenCaptureEngine: NSObject {
 
         try stream?.addStreamOutput(self, type: .screen, sampleHandlerQueue: .main)
         try await stream?.startCapture()
-
-        // Start periodic refresh to catch new windows from excluded apps
-        DispatchQueue.main.async {
-            self.refreshTimer = Timer.scheduledTimer(withTimeInterval: 2.0, repeats: true) { [weak self] _ in
-                self?.refreshExcludedApps()
-            }
-        }
     }
 
     private func buildContentFilter(display: SCDisplay) async throws -> SCContentFilter {

Cloak/Info.plist

@@ -3,9 +3,9 @@
 <plist version="1.0">
 <dict>
 	<key>CFBundleShortVersionString</key>
-	<string>1.3.3</string>
+	<string>1.3.4</string>
 	<key>CFBundleVersion</key>
-	<string>7</string>
+	<string>8</string>
 	<key>NSScreenCaptureUsageDescription</key>
 	<string>Cloak needs to capture your screen to create a preview window that you can share.</string>
 </dict>