diff --git a/src/VoiceCommandExecutor.swift b/src/VoiceCommandExecutor.swift
index 4697fbe..66ca830 100644
--- a/src/VoiceCommandExecutor.swift
+++ b/src/VoiceCommandExecutor.swift
@@ -1022,10 +1022,17 @@ public final class VoiceCommandExecutor {
         let ws = NSWorkspace.shared
         if let running = ws.runningApplications.first(where: { $0.bundleURL == url }) {
             running.activate(options: [.activateIgnoringOtherApps])
+            ensureWindowFullScreen(app: running)
         } else {
             let conf = NSWorkspace.OpenConfiguration()
             conf.activates = true
-            ws.openApplication(at: url, configuration: conf, completionHandler: nil)
+            ws.openApplication(at: url, configuration: conf) { app, _ in
+                if let launched = app {
+                    DispatchQueue.main.async {
+                        self.pollAndMakeFullScreen(app: launched, targetBid: launched.bundleIdentifier, appName: name)
+                    }
+                }
+            }
         }
         HistoryManager.shared.addEntry("⚡️ [App] Open \(name)")
     }
@@ -1084,10 +1091,10 @@ public final class VoiceCommandExecutor {
         }
     }
     
-    private func launchOrActivateApp(named appName: String) {
+    private func launchOrActivateApp(named appName: String, completion: (() -> Void)? = nil) {
         let ws = NSWorkspace.shared
         
-        // 1. Precise bundle identifier map (prevents "Antigravity" substring matching "Antigravity IDE")
+        // 1. Precise bundle identifier map
         let bundleIDMap: [String: String] = [
             "Antigravity": "com.google.antigravity",
             "Antigravity IDE": "com.google.antigravity-ide",
@@ -1097,40 +1104,135 @@ public final class VoiceCommandExecutor {
             "Safari": "com.apple.Safari"
         ]
         
-        if let bid = bundleIDMap[appName] {
-            // Check currently running app by exact bundleIdentifier
-            if let running = ws.runningApplications.first(where: { $0.bundleIdentifier == bid }) {
+        let targetBid = bundleIDMap[appName]
+        
+        // Check if currently running
+        let runningApp = ws.runningApplications.first(where: {
+            if let bid = targetBid, $0.bundleIdentifier == bid { return true }
+            return $0.localizedName?.caseInsensitiveCompare(appName) == .orderedSame
+        })
+        
+        if let running = runningApp {
+            running.activate(options: [.activateIgnoringOtherApps])
+            ensureWindowFullScreen(app: running)
+            DispatchQueue.main.asyncAfter(deadline: .now() + 0.15) {
                 running.activate(options: [.activateIgnoringOtherApps])
-                return
-            }
-            // If not running, launch via exact URL
-            if let appURL = ws.urlForApplication(withBundleIdentifier: bid) {
-                let conf = NSWorkspace.OpenConfiguration()
-                conf.activates = true
-                ws.openApplication(at: appURL, configuration: conf, completionHandler: nil)
-                return
+                completion?()
             }
+            return
         }
         
-        // 2. Strict EXACT localized name match (NOT contains!)
-        if let running = ws.runningApplications.first(where: {
-            $0.localizedName?.caseInsensitiveCompare(appName) == .orderedSame
-        }) {
-            running.activate(options: [.activateIgnoringOtherApps])
+        // Cold launch if app was closed
+        if let bid = targetBid, let appURL = ws.urlForApplication(withBundleIdentifier: bid) {
+            let conf = NSWorkspace.OpenConfiguration()
+            conf.activates = true
+            ws.openApplication(at: appURL, configuration: conf) { app, _ in
+                DispatchQueue.main.async {
+                    self.pollAndMakeFullScreen(app: app, targetBid: bid, appName: appName, completion: completion)
+                }
+            }
             return
         }
         
-        // 3. Fallback: launch via /usr/bin/open -a with exact app name
+        // Fallback: launch via /usr/bin/open -a
         let task = Process()
         task.executableURL = URL(fileURLWithPath: "/usr/bin/open")
         task.arguments = ["-a", appName]
         try? task.run()
+        
+        DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
+            self.pollAndMakeFullScreen(app: nil, targetBid: targetBid, appName: appName, completion: completion)
+        }
     }
     
     private func activateApp(named appName: String, completion: @escaping () -> Void) {
-        launchOrActivateApp(named: appName)
-        DispatchQueue.main.asyncAfter(deadline: .now() + 0.22) {
-            completion()
+        launchOrActivateApp(named: appName, completion: completion)
+    }
+
+    @discardableResult
+    private func ensureWindowFullScreen(app: NSRunningApplication) -> Bool {
+        let appElem = AXUIElementCreateApplication(app.processIdentifier)
+        
+        var windowObj: CFTypeRef?
+        let hasWin = (AXUIElementCopyAttributeValue(appElem, kAXFocusedWindowAttribute as CFString, &windowObj) == .success && windowObj != nil) ||
+                     (AXUIElementCopyAttributeValue(appElem, kAXMainWindowAttribute as CFString, &windowObj) == .success && windowObj != nil)
+        
+        guard hasWin, let winElem = windowObj else {
+            var winListObj: CFTypeRef?
+            if AXUIElementCopyAttributeValue(appElem, kAXWindowsAttribute as CFString, &winListObj) == .success,
+               let winList = winListObj as? [AXUIElement], let firstWin = winList.first {
+                return applyFullScreen(to: firstWin, app: app)
+            }
+            return false
+        }
+        
+        return applyFullScreen(to: winElem as! AXUIElement, app: app)
+    }
+
+    private func applyFullScreen(to axWin: AXUIElement, app: NSRunningApplication) -> Bool {
+        // 1. Check if already full screen
+        var isFullObj: CFTypeRef?
+        if AXUIElementCopyAttributeValue(axWin, "AXFullScreen" as CFString, &isFullObj) == .success,
+           let isFull = isFullObj as? Bool, isFull {
+            return true
+        }
+        
+        // 2. Set native macOS full-screen space attribute
+        let setRes = AXUIElementSetAttributeValue(axWin, "AXFullScreen" as CFString, kCFBooleanTrue)
+        if setRes == .success {
+            return true
+        }
+        
+        // 3. Fallback: Zoom button (kAXFullScreenButton)
+        var zoomObj: CFTypeRef?
+        if AXUIElementCopyAttributeValue(axWin, "AXFullScreenButton" as CFString, &zoomObj) == .success, let btn = zoomObj {
+            AXUIElementPerformAction(btn as! AXUIElement, kAXPressAction as CFString)
+            return true
+        }
+        
+        // 4. Fallback: Cmd+Ctrl+F shortcut
+        app.activate(options: [.activateIgnoringOtherApps])
+        pressHotkey(keyCode: 3, modifiers: [.maskCommand, .maskControl]) // 'F' + Cmd + Ctrl
+        return true
+    }
+
+    private func pollAndMakeFullScreen(
+        app: NSRunningApplication?,
+        targetBid: String?,
+        appName: String,
+        attempt: Int = 1,
+        completion: (() -> Void)? = nil
+    ) {
+        let ws = NSWorkspace.shared
+        let target = app ?? ws.runningApplications.first(where: {
+            if let bid = targetBid, $0.bundleIdentifier == bid { return true }
+            return $0.localizedName?.caseInsensitiveCompare(appName) == .orderedSame
+        })
+        
+        if let target = target {
+            target.activate(options: [.activateIgnoringOtherApps])
+            if ensureWindowFullScreen(app: target) {
+                DispatchQueue.main.asyncAfter(deadline: .now() + 0.15) {
+                    target.activate(options: [.activateIgnoringOtherApps])
+                    completion?()
+                }
+                return
+            }
+        }
+        
+        if attempt < 18 {
+            DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
+                self.pollAndMakeFullScreen(
+                    app: target,
+                    targetBid: targetBid,
+                    appName: appName,
+                    attempt: attempt + 1,
+                    completion: completion
+                )
+            }
+        } else {
+            target?.activate(options: [.activateIgnoringOtherApps])
+            completion?()
         }
     }