Rename to cmux and add About panel

CLAUDE.md

@@ -1,4 +1,4 @@
-# GhosttyTabs
+# cmux
 
 A macOS terminal app with vertical tabs, using libghostty (GhosttyKit.xcframework) for terminal emulation.
 
@@ -12,9 +12,9 @@ A macOS terminal app with vertical tabs, using libghostty (GhosttyKit.xcframewor
 ### Build and launch (Release)
 ```bash
 cd /Users/lawrencechen/fun/cmux-terminal/GhosttyTabs
-pkill -9 GhosttyTabs 2>/dev/null
+pkill -9 cmux 2>/dev/null
-xcodebuild -scheme GhosttyTabs -configuration Release build
+xcodebuild -scheme cmux -configuration Release build
-open ~/Library/Developer/Xcode/DerivedData/GhosttyTabs-cbjivvtpirygxbbgqlpdpiiyjnwh/Build/Products/Release/GhosttyTabs.app
+open ~/Library/Developer/Xcode/DerivedData/GhosttyTabs-cbjivvtpirygxbbgqlpdpiiyjnwh/Build/Products/Release/cmux.app
 ```
 
 ### Rebuild libghostty (optimized)
@@ -26,18 +26,18 @@ cp -R /tmp/ghostty/macos/GhosttyKit.xcframework /Users/lawrencechen/fun/cmux-ter
 
 ### Project structure
 - `Sources/` - Swift source files
-  - `GhosttyTabsApp.swift` - App entry point with keyboard shortcuts
+  - `cmuxApp.swift` - App entry point with keyboard shortcuts
   - `ContentView.swift` - Main UI with vertical tabs sidebar
   - `TabManager.swift` - Tab state management
   - `GhosttyTerminalView.swift` - libghostty terminal integration
   - `GhosttyConfig.swift` - Ghostty config parser
   - `TerminalController.swift` - Unix socket server for programmatic control
 - `tests/` - Test files and utilities
-  - `ghosttytabs.py` - Python client library for socket API
+  - `cmux.py` - Python client library for socket API
   - `test_ctrl_socket.py` - Main automated test suite
 - `GhosttyKit.xcframework/` - libghostty static library (gitignored, rebuild from /tmp/ghostty)
 - `ghostty.h` - Ghostty C API header
-- `GhosttyTabs-Bridging-Header.h` - Swift bridging header
+- `cmux-Bridging-Header.h` - Swift bridging header
 
 ### Keyboard Shortcuts
 - `Cmd+T` / `Cmd+N` / `Ctrl+Shift+`` - New tab
@@ -54,7 +54,7 @@ Reads user's Ghostty config from:
 
 ### Unix Socket Control API
 
-GhosttyTabs exposes a Unix socket at `/tmp/ghosttytabs.sock` for programmatic control and automated testing. The socket is created when the app launches.
+cmux exposes a Unix socket at `/tmp/cmux.sock` for programmatic control and automated testing. The socket is created when the app launches.
 
 #### Socket Commands
 
@@ -84,12 +84,12 @@ Use `\n` for Enter (carriage return), `\t` for tab, `\r` for raw CR.
 
 ### Python Client Library
 
-Located at `tests/ghosttytabs.py`:
+Located at `tests/cmux.py`:
 
 ```python
-from ghosttytabs import GhosttyTabs
+from cmux import cmux
 
-with GhosttyTabs() as client:
+with cmux() as client:
     # Send text with Enter
     client.send("echo hello\n")
 
@@ -108,16 +108,16 @@ with GhosttyTabs() as client:
 
 ```bash
 # Build and launch the app first
-pkill -9 GhosttyTabs 2>/dev/null
+pkill -9 cmux 2>/dev/null
-xcodebuild -scheme GhosttyTabs -configuration Release build
+xcodebuild -scheme cmux -configuration Release build
-open ~/Library/Developer/Xcode/DerivedData/GhosttyTabs-cbjivvtpirygxbbgqlpdpiiyjnwh/Build/Products/Release/GhosttyTabs.app
+open ~/Library/Developer/Xcode/DerivedData/GhosttyTabs-cbjivvtpirygxbbgqlpdpiiyjnwh/Build/Products/Release/cmux.app
 sleep 3
 
 # Run the main test suite (tests Ctrl+C, Ctrl+D)
 python3 tests/test_ctrl_socket.py
 
 # Interactive CLI for manual testing
-python3 tests/ghosttytabs.py
+python3 tests/cmux.py
 ```
 
 ### Writing New Tests
@@ -148,7 +148,7 @@ python3 tests/ghosttytabs.py
 
 ### Test Files
 
-- `tests/ghosttytabs.py` - Python client library for socket API
+- `tests/cmux.py` - Python client library for socket API
 - `tests/test_ctrl_socket.py` - Automated Ctrl+C/D test suite (main tests)
 - `tests/test_signals_auto.py` - PTY-based signal tests (standalone)
 - `tests/test_ctrl_interactive.py` - Interactive manual tests

GhosttyTabs.xcodeproj/project.pbxproj

@@ -7,7 +7,7 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
-		A5001001 /* GhosttyTabsApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5001011 /* GhosttyTabsApp.swift */; };
+		A5001001 /* cmuxApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5001011 /* cmuxApp.swift */; };
 		A5001002 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5001012 /* ContentView.swift */; };
 		A5001003 /* TabManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5001013 /* TabManager.swift */; };
 		A5001004 /* GhosttyConfig.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5001014 /* GhosttyConfig.swift */; };
@@ -49,16 +49,16 @@
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
-		A5001000 /* GhosttyTabs.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = GhosttyTabs.app; sourceTree = BUILT_PRODUCTS_DIR; };
+		A5001000 /* cmux.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = cmux.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		7E7E6EF344A568AC7FEE3715 /* GhosttyTabsUITests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = GhosttyTabsUITests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
-		A5001011 /* GhosttyTabsApp.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GhosttyTabsApp.swift; sourceTree = "<group>"; };
+		A5001011 /* cmuxApp.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = cmuxApp.swift; sourceTree = "<group>"; };
 		A5001012 /* ContentView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ContentView.swift; sourceTree = "<group>"; };
 		A5001013 /* TabManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TabManager.swift; sourceTree = "<group>"; };
 		A5001014 /* GhosttyConfig.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GhosttyConfig.swift; sourceTree = "<group>"; };
 		A5001015 /* GhosttyTerminalView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GhosttyTerminalView.swift; sourceTree = "<group>"; };
 		A5001016 /* GhosttyKit.xcframework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.xcframework; path = GhosttyKit.xcframework; sourceTree = "<group>"; };
 		A5001017 /* ghostty.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = ghostty.h; sourceTree = "<group>"; };
-		A5001018 /* GhosttyTabs-Bridging-Header.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "GhosttyTabs-Bridging-Header.h"; sourceTree = "<group>"; };
+		A5001018 /* cmux-Bridging-Header.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "cmux-Bridging-Header.h"; sourceTree = "<group>"; };
 		A5001019 /* TerminalController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TerminalController.swift; sourceTree = "<group>"; };
 		A5001090 /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 		A5001091 /* NotificationsPage.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NotificationsPage.swift; sourceTree = "<group>"; };
@@ -117,7 +117,7 @@
 				A5001101 /* Assets.xcassets */,
 				A5001016 /* GhosttyKit.xcframework */,
 				A5001017 /* ghostty.h */,
-				A5001018 /* GhosttyTabs-Bridging-Header.h */,
+				A5001018 /* cmux-Bridging-Header.h */,
 				3196C9C2D01F054C1D3385DD /* GhosttyTabsUITests */,
 				A5001042 /* Products */,
 			);
@@ -126,7 +126,7 @@
 		A5001041 /* Sources */ = {
 			isa = PBXGroup;
 			children = (
-				A5001011 /* GhosttyTabsApp.swift */,
+				A5001011 /* cmuxApp.swift */,
 				A5001012 /* ContentView.swift */,
 				A5001013 /* TabManager.swift */,
 				A5001014 /* GhosttyConfig.swift */,
@@ -153,7 +153,7 @@
 		A5001042 /* Products */ = {
 			isa = PBXGroup;
 			children = (
-				A5001000 /* GhosttyTabs.app */,
+				A5001000 /* cmux.app */,
 				7E7E6EF344A568AC7FEE3715 /* GhosttyTabsUITests.xctest */,
 			);
 			name = Products;
@@ -185,7 +185,7 @@
 			);
 			name = GhosttyTabs;
 			productName = GhosttyTabs;
-			productReference = A5001000 /* GhosttyTabs.app */;
+			productReference = A5001000 /* cmux.app */;
 			productType = "com.apple.product-type.application";
 		};
 		CB450DF0F0B3839599082C4D /* GhosttyTabsUITests */ = {
@@ -240,7 +240,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				A5001001 /* GhosttyTabsApp.swift in Sources */,
+				A5001001 /* cmuxApp.swift in Sources */,
 				A5001002 /* ContentView.swift in Sources */,
 				A5001003 /* TabManager.swift in Sources */,
 				A5001004 /* GhosttyConfig.swift in Sources */,
@@ -346,6 +346,8 @@
 				DEVELOPMENT_TEAM = "";
 				ENABLE_HARDENED_RUNTIME = NO;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_KEY_CFBundleDisplayName = cmux;
+				INFOPLIST_KEY_CFBundleName = cmux;
 				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.developer-tools";
 				INFOPLIST_KEY_NSHumanReadableCopyright = "";
 				INFOPLIST_KEY_NSMainStoryboardFile = "";
@@ -368,10 +370,10 @@
 					"-framework",
 					Carbon,
 				);
-				PRODUCT_BUNDLE_IDENTIFIER = com.ghosttytabs.app;
+				PRODUCT_BUNDLE_IDENTIFIER = com.cmux.app;
-				PRODUCT_NAME = "$(TARGET_NAME)";
+				PRODUCT_NAME = cmux;
 				SWIFT_EMIT_LOC_STRINGS = YES;
-				SWIFT_OBJC_BRIDGING_HEADER = "GhosttyTabs-Bridging-Header.h";
+				SWIFT_OBJC_BRIDGING_HEADER = "cmux-Bridging-Header.h";
 				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
@@ -387,6 +389,8 @@
 				DEVELOPMENT_TEAM = "";
 				ENABLE_HARDENED_RUNTIME = NO;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_KEY_CFBundleDisplayName = cmux;
+				INFOPLIST_KEY_CFBundleName = cmux;
 				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.developer-tools";
 				INFOPLIST_KEY_NSHumanReadableCopyright = "";
 				INFOPLIST_KEY_NSMainStoryboardFile = "";
@@ -410,10 +414,10 @@
 					Carbon,
 				);
 				ONLY_ACTIVE_ARCH = YES;
-				PRODUCT_BUNDLE_IDENTIFIER = com.ghosttytabs.app;
+				PRODUCT_BUNDLE_IDENTIFIER = com.cmux.app;
-				PRODUCT_NAME = "$(TARGET_NAME)";
+				PRODUCT_NAME = cmux;
 				SWIFT_EMIT_LOC_STRINGS = YES;
-				SWIFT_OBJC_BRIDGING_HEADER = "GhosttyTabs-Bridging-Header.h";
+				SWIFT_OBJC_BRIDGING_HEADER = "cmux-Bridging-Header.h";
 				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
@@ -427,7 +431,7 @@
 				MACOSX_DEPLOYMENT_TARGET = 13.0;
 				MARKETING_VERSION = 1.0;
 				ONLY_ACTIVE_ARCH = YES;
-				PRODUCT_BUNDLE_IDENTIFIER = com.ghosttytabs.appuitests;
+				PRODUCT_BUNDLE_IDENTIFIER = com.cmux.appuitests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = "DEBUG $(inherited)";
 				SWIFT_VERSION = 5.0;
@@ -444,7 +448,7 @@
 				MACOSX_DEPLOYMENT_TARGET = 13.0;
 				MARKETING_VERSION = 1.0;
 				ONLY_ACTIVE_ARCH = YES;
-				PRODUCT_BUNDLE_IDENTIFIER = com.ghosttytabs.appuitests;
+				PRODUCT_BUNDLE_IDENTIFIER = com.cmux.appuitests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_VERSION = 5.0;
 				TEST_TARGET_NAME = GhosttyTabs;

GhosttyTabs.xcodeproj/xcshareddata/xcschemes/cmux.xcscheme

@@ -3,7 +3,7 @@
   <BuildAction parallelizeBuildables="YES" buildImplicitDependencies="YES">
     <BuildActionEntries>
       <BuildActionEntry buildForTesting="YES" buildForRunning="YES" buildForProfiling="YES" buildForArchiving="YES" buildForAnalyzing="YES">
-        <BuildableReference BuildableIdentifier="primary" BlueprintIdentifier="A5001050" BuildableName="GhosttyTabs.app" BlueprintName="GhosttyTabs" ReferencedContainer="container:GhosttyTabs.xcodeproj"/>
+        <BuildableReference BuildableIdentifier="primary" BlueprintIdentifier="A5001050" BuildableName="cmux.app" BlueprintName="GhosttyTabs" ReferencedContainer="container:GhosttyTabs.xcodeproj"/>
       </BuildActionEntry>
     </BuildActionEntries>
   </BuildAction>
@@ -14,17 +14,17 @@
       </TestableReference>
     </Testables>
     <MacroExpansion>
-      <BuildableReference BuildableIdentifier="primary" BlueprintIdentifier="A5001050" BuildableName="GhosttyTabs.app" BlueprintName="GhosttyTabs" ReferencedContainer="container:GhosttyTabs.xcodeproj"/>
+      <BuildableReference BuildableIdentifier="primary" BlueprintIdentifier="A5001050" BuildableName="cmux.app" BlueprintName="GhosttyTabs" ReferencedContainer="container:GhosttyTabs.xcodeproj"/>
     </MacroExpansion>
   </TestAction>
   <LaunchAction buildConfiguration="Release" selectedDebuggerIdentifier="Xcode.DebuggerFoundation.Debugger.LLDB" selectedLauncherIdentifier="Xcode.DebuggerFoundation.Launcher.LLDB" launchStyle="0" useCustomWorkingDirectory="NO" ignoresPersistentStateOnLaunch="NO" debugDocumentVersioning="YES" allowLocationSimulation="YES">
     <BuildableProductRunnable runnableDebuggingMode="0">
-      <BuildableReference BuildableIdentifier="primary" BlueprintIdentifier="A5001050" BuildableName="GhosttyTabs.app" BlueprintName="GhosttyTabs" ReferencedContainer="container:GhosttyTabs.xcodeproj"/>
+      <BuildableReference BuildableIdentifier="primary" BlueprintIdentifier="A5001050" BuildableName="cmux.app" BlueprintName="GhosttyTabs" ReferencedContainer="container:GhosttyTabs.xcodeproj"/>
     </BuildableProductRunnable>
   </LaunchAction>
   <ProfileAction buildConfiguration="Release" shouldUseLaunchSchemeArgsEnv="YES" savedToolIdentifier="" useCustomWorkingDirectory="NO" debugDocumentVersioning="YES">
     <BuildableProductRunnable runnableDebuggingMode="0">
-      <BuildableReference BuildableIdentifier="primary" BlueprintIdentifier="A5001050" BuildableName="GhosttyTabs.app" BlueprintName="GhosttyTabs" ReferencedContainer="container:GhosttyTabs.xcodeproj"/>
+      <BuildableReference BuildableIdentifier="primary" BlueprintIdentifier="A5001050" BuildableName="cmux.app" BlueprintName="GhosttyTabs" ReferencedContainer="container:GhosttyTabs.xcodeproj"/>
     </BuildableProductRunnable>
   </ProfileAction>
   <AnalyzeAction buildConfiguration="Release"/>

Package.swift

@@ -2,19 +2,19 @@
 import PackageDescription
 
 let package = Package(
-    name: "GhosttyTabs",
+    name: "cmux",
     platforms: [
         .macOS(.v13)
     ],
     products: [
-        .executable(name: "GhosttyTabs", targets: ["GhosttyTabs"])
+        .executable(name: "cmux", targets: ["cmux"])
     ],
     dependencies: [
         .package(url: "https://github.com/migueldeicaza/SwiftTerm.git", from: "1.2.0")
     ],
     targets: [
         .executableTarget(
-            name: "GhosttyTabs",
+            name: "cmux",
             dependencies: ["SwiftTerm"],
             path: "Sources"
         )

README.md

@@ -1,14 +1,14 @@
-# GhosttyTabs
+# cmux
 
 Vertical tabs for Ghostty on macOS, built on libghostty.
 
-[![Download macOS](https://img.shields.io/badge/Download-macOS-1b5fdd?style=for-the-badge&logo=apple)](releases/latest/download/GhosttyTabs-macos.zip)
+[![Download macOS](https://img.shields.io/badge/Download-macOS-1b5fdd?style=for-the-badge&logo=apple)](releases/latest/download/cmux-macos.zip)
 
 ## Releases
 
 Tag a version like `v0.1.0` and push it to trigger the GitHub Actions release workflow.
 The workflow builds `GhosttyKit.xcframework`, builds the Release app, signs, notarizes,
-staples, and uploads `GhosttyTabs-macos.zip` to the release.
+staples, and uploads `cmux-macos.zip` to the release.
 
 ### Required GitHub secrets
 

Sources/AppDelegate.swift

@@ -17,6 +17,7 @@ final class AppDelegate: NSObject, NSApplicationDelegate, UNUserNotificationCent
     func applicationDidFinishLaunching(_ notification: Notification) {
         registerLaunchServicesBundle()
         enforceSingleInstance()
+        ensureApplicationIcon()
         observeDuplicateLaunches()
         configureUserNotifications()
     }
@@ -46,6 +47,12 @@ final class AppDelegate: NSObject, NSApplicationDelegate, UNUserNotificationCent
         center.delegate = self
     }
 
+    private func ensureApplicationIcon() {
+        if let icon = NSImage(named: NSImage.applicationIconName) {
+            NSApplication.shared.applicationIconImage = icon
+        }
+    }
+
     private func registerLaunchServicesBundle() {
         let bundleURL = Bundle.main.bundleURL.standardizedFileURL
         let registerStatus = LSRegisterURL(bundleURL as CFURL, true)

Sources/GhosttyTerminalView.swift

@@ -70,12 +70,18 @@ class GhosttyApp {
     private(set) var defaultBackgroundColor: NSColor = .windowBackgroundColor
     private(set) var defaultBackgroundOpacity: Double = 1.0
     let backgroundLogEnabled = {
+        if ProcessInfo.processInfo.environment["CMUX_DEBUG_BG"] == "1" {
+            return true
+        }
         if ProcessInfo.processInfo.environment["GHOSTTYTABS_DEBUG_BG"] == "1" {
             return true
         }
+        if UserDefaults.standard.bool(forKey: "cmuxDebugBG") {
+            return true
+        }
         return UserDefaults.standard.bool(forKey: "GhosttyTabsDebugBG")
     }()
-    private let backgroundLogURL = URL(fileURLWithPath: "/tmp/ghosttytabs-bg.log")
+    private let backgroundLogURL = URL(fileURLWithPath: "/tmp/cmux-bg.log")
     private var appObservers: [NSObjectProtocol] = []
     private var displayLink: CVDisplayLink?
     private var displayLinkUsers = 0
@@ -555,7 +561,7 @@ class GhosttyApp {
     }
 
     func logBackground(_ message: String) {
-        let line = "GhosttyTabs bg: \(message)\n"
+        let line = "cmux bg: \(message)\n"
         if let data = line.data(using: .utf8) {
             if FileManager.default.fileExists(atPath: backgroundLogURL.path) == false {
                 FileManager.default.createFile(atPath: backgroundLogURL.path, contents: nil)
@@ -1696,7 +1702,7 @@ final class GhosttySurfaceScrollView: NSView {
                 CAMediaTimingFunction(name: .easeOut),
                 CAMediaTimingFunction(name: .easeIn)
             ]
-            self.flashLayer.add(animation, forKey: "ghosttytabs.flash")
+            self.flashLayer.add(animation, forKey: "cmux.flash")
         }
     }
 

Sources/TerminalController.swift

@@ -5,7 +5,7 @@ import Foundation
 class TerminalController {
     static let shared = TerminalController()
 
-    private let socketPath = "/tmp/ghosttytabs.sock"
+    private let socketPath = "/tmp/cmux.sock"
     private var serverSocket: Int32 = -1
     private var isRunning = false
     private var clientHandlers: [Int32: Thread] = [:]

Sources/TerminalNotificationStore.swift

@@ -15,8 +15,8 @@ struct TerminalNotification: Identifiable, Hashable {
 final class TerminalNotificationStore: ObservableObject {
     static let shared = TerminalNotificationStore()
 
-    static let categoryIdentifier = "com.cmux.ghosttytabs.userNotification"
+    static let categoryIdentifier = "com.cmux.app.userNotification"
-    static let actionShowIdentifier = "com.cmux.ghosttytabs.userNotification.show"
+    static let actionShowIdentifier = "com.cmux.app.userNotification.show"
 
     @Published private(set) var notifications: [TerminalNotification] = []
 

Sources/cmuxApp.swift

@@ -1,7 +1,8 @@
+import AppKit
 import SwiftUI
 
 @main
-struct GhosttyTabsApp: App {
+struct cmuxApp: App {
     @StateObject private var tabManager = TabManager()
     @StateObject private var notificationStore = TerminalNotificationStore.shared
     @NSApplicationDelegateAdaptor(AppDelegate.self) private var appDelegate
@@ -24,6 +25,12 @@ struct GhosttyTabsApp: App {
         }
         .windowStyle(.hiddenTitleBar)
         .commands {
+            CommandGroup(replacing: .appInfo) {
+                Button("About cmux") {
+                    showAboutPanel()
+                }
+            }
+
             // New tab commands
             CommandGroup(replacing: .newItem) {
                 Button("New Tab") {
@@ -93,4 +100,19 @@ struct GhosttyTabsApp: App {
             }
         }
     }
+
+    private func showAboutPanel() {
+        let bundle = Bundle.main
+        let appName = bundle.object(forInfoDictionaryKey: "CFBundleDisplayName") as? String
+            ?? bundle.object(forInfoDictionaryKey: "CFBundleName") as? String
+            ?? "cmux"
+        let version = bundle.object(forInfoDictionaryKey: "CFBundleShortVersionString") as? String ?? "1.0"
+        let build = bundle.object(forInfoDictionaryKey: "CFBundleVersion") as? String ?? "1"
+        NSApp.orderFrontStandardAboutPanel(options: [
+            .applicationName: appName,
+            .version: version,
+            .applicationVersion: build
+        ])
+        NSApp.activate(ignoringOtherApps: true)
+    }
 }

scripts/rebuild.sh

@@ -1,18 +1,18 @@
 #!/bin/bash
-# Rebuild and restart GhosttyTabs app
+# Rebuild and restart cmux app
 
 set -e
 
 cd "$(dirname "$0")/.."
 
 # Kill existing app if running
-pkill -9 -f "GhosttyTabs" 2>/dev/null || true
+pkill -9 -f "cmux" 2>/dev/null || true
 
 # Build
 swift build
 
 # Copy to app bundle
-cp .build/debug/GhosttyTabs .build/debug/GhosttyTabs.app/Contents/MacOS/
+cp .build/debug/cmux .build/debug/cmux.app/Contents/MacOS/
 
 # Open the app
-open .build/debug/GhosttyTabs.app
+open .build/debug/cmux.app

tests/cmux.py

@@ -1,13 +1,13 @@
 #!/usr/bin/env python3
 """
-GhosttyTabs Python Client
+cmux Python Client
 
-A client library for programmatically controlling GhosttyTabs via Unix socket.
+A client library for programmatically controlling cmux via Unix socket.
 
 Usage:
-    from ghosttytabs import GhosttyTabs
+    from cmux import cmux
 
-    client = GhosttyTabs()
+    client = cmux()
     client.connect()
 
     # Send text to terminal
@@ -33,29 +33,29 @@ import os
 from typing import Optional, List, Tuple
 
 
-class GhosttyTabsError(Exception):
+class cmuxError(Exception):
-    """Exception raised for GhosttyTabs errors"""
+    """Exception raised for cmux errors"""
     pass
 
 
-class GhosttyTabs:
+class cmux:
-    """Client for controlling GhosttyTabs via Unix socket"""
+    """Client for controlling cmux via Unix socket"""
 
-    DEFAULT_SOCKET_PATH = "/tmp/ghosttytabs.sock"
+    DEFAULT_SOCKET_PATH = "/tmp/cmux.sock"
 
     def __init__(self, socket_path: str = None):
         self.socket_path = socket_path or self.DEFAULT_SOCKET_PATH
         self._socket: Optional[socket.socket] = None
 
     def connect(self) -> None:
-        """Connect to the GhosttyTabs socket"""
+        """Connect to the cmux socket"""
         if self._socket is not None:
             return
 
         if not os.path.exists(self.socket_path):
-            raise GhosttyTabsError(
+            raise cmuxError(
                 f"Socket not found at {self.socket_path}. "
-                "Is GhosttyTabs running?"
+                "Is cmux running?"
             )
 
         self._socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
@@ -64,7 +64,7 @@ class GhosttyTabs:
             self._socket.settimeout(5.0)
         except socket.error as e:
             self._socket = None
-            raise GhosttyTabsError(f"Failed to connect: {e}")
+            raise cmuxError(f"Failed to connect: {e}")
 
     def close(self) -> None:
         """Close the connection"""
@@ -83,16 +83,16 @@ class GhosttyTabs:
     def _send_command(self, command: str) -> str:
         """Send a command and receive response"""
         if self._socket is None:
-            raise GhosttyTabsError("Not connected")
+            raise cmuxError("Not connected")
 
         try:
             self._socket.sendall((command + "\n").encode())
             response = self._socket.recv(8192).decode().strip()
             return response
         except socket.timeout:
-            raise GhosttyTabsError("Command timed out")
+            raise cmuxError("Command timed out")
         except socket.error as e:
-            raise GhosttyTabsError(f"Socket error: {e}")
+            raise cmuxError(f"Socket error: {e}")
 
     def ping(self) -> bool:
         """Check if the server is responding"""
@@ -126,25 +126,25 @@ class GhosttyTabs:
         response = self._send_command("new_tab")
         if response.startswith("OK "):
             return response[3:]
-        raise GhosttyTabsError(response)
+        raise cmuxError(response)
 
     def new_split(self, direction: str) -> None:
         """Create a split in the given direction (left/right/up/down)."""
         response = self._send_command(f"new_split {direction}")
         if not response.startswith("OK"):
-            raise GhosttyTabsError(response)
+            raise cmuxError(response)
 
     def close_tab(self, tab_id: str) -> None:
         """Close a tab by ID"""
         response = self._send_command(f"close_tab {tab_id}")
         if not response.startswith("OK"):
-            raise GhosttyTabsError(response)
+            raise cmuxError(response)
 
     def select_tab(self, tab: str | int) -> None:
         """Select a tab by ID or index"""
         response = self._send_command(f"select_tab {tab}")
         if not response.startswith("OK"):
-            raise GhosttyTabsError(response)
+            raise cmuxError(response)
 
     def list_surfaces(self, tab: str | int | None = None) -> List[Tuple[int, str, bool]]:
         """
@@ -172,13 +172,13 @@ class GhosttyTabs:
         """Focus a surface by ID or index in the current tab."""
         response = self._send_command(f"focus_surface {surface}")
         if not response.startswith("OK"):
-            raise GhosttyTabsError(response)
+            raise cmuxError(response)
 
     def current_tab(self) -> str:
         """Get the current tab's ID"""
         response = self._send_command("current_tab")
         if response.startswith("ERROR"):
-            raise GhosttyTabsError(response)
+            raise cmuxError(response)
         return response
 
     def send(self, text: str) -> None:
@@ -195,14 +195,14 @@ class GhosttyTabs:
         escaped = text.replace("\n", "\\n").replace("\r", "\\r").replace("\t", "\\t")
         response = self._send_command(f"send {escaped}")
         if not response.startswith("OK"):
-            raise GhosttyTabsError(response)
+            raise cmuxError(response)
 
     def send_surface(self, surface: str | int, text: str) -> None:
         """Send text to a specific surface by ID or index in the current tab."""
         escaped = text.replace("\n", "\\n").replace("\r", "\\r").replace("\t", "\\t")
         response = self._send_command(f"send_surface {surface} {escaped}")
         if not response.startswith("OK"):
-            raise GhosttyTabsError(response)
+            raise cmuxError(response)
 
     def send_key(self, key: str) -> None:
         """
@@ -215,13 +215,13 @@ class GhosttyTabs:
         """
         response = self._send_command(f"send_key {key}")
         if not response.startswith("OK"):
-            raise GhosttyTabsError(response)
+            raise cmuxError(response)
 
     def send_key_surface(self, surface: str | int, key: str) -> None:
         """Send a special key to a specific surface by ID or index in the current tab."""
         response = self._send_command(f"send_key_surface {surface} {key}")
         if not response.startswith("OK"):
-            raise GhosttyTabsError(response)
+            raise cmuxError(response)
 
     def send_line(self, text: str) -> None:
         """Send text followed by Enter"""
@@ -241,23 +241,23 @@ class GhosttyTabs:
 
 
 def main():
-    """CLI interface for ghosttytabs"""
+    """CLI interface for cmux"""
     import sys
     import argparse
 
-    parser = argparse.ArgumentParser(description="GhosttyTabs CLI")
+    parser = argparse.ArgumentParser(description="cmux CLI")
     parser.add_argument("command", nargs="?", help="Command to send")
     parser.add_argument("args", nargs="*", help="Command arguments")
-    parser.add_argument("-s", "--socket", default=GhosttyTabs.DEFAULT_SOCKET_PATH,
+    parser.add_argument("-s", "--socket", default=cmux.DEFAULT_SOCKET_PATH,
                         help="Socket path")
 
     args = parser.parse_args()
 
     try:
-        with GhosttyTabs(args.socket) as client:
+        with cmux(args.socket) as client:
             if not args.command:
                 # Interactive mode
-                print("GhosttyTabs CLI (type 'help' for commands, 'quit' to exit)")
+                print("cmux CLI (type 'help' for commands, 'quit' to exit)")
                 while True:
                     try:
                         line = input("> ").strip()
@@ -278,7 +278,7 @@ def main():
                     command += " " + " ".join(args.args)
                 response = client._send_command(command)
                 print(response)
-    except GhosttyTabsError as e:
+    except cmuxError as e:
         print(f"Error: {e}", file=sys.stderr)
         sys.exit(1)
 

tests/test_app_keystrokes.sh

@@ -1,24 +1,24 @@
 #!/bin/bash
-# Test script that sends keystrokes to GhosttyTabs via AppleScript
+# Test script that sends keystrokes to cmux via AppleScript
 # This tests the actual keyboard input path through the app
 
 set -e
 
-echo "=== GhosttyTabs Keystroke Test ==="
+echo "=== cmux Keystroke Test ==="
 echo ""
 
-# Check if GhosttyTabs is running
+# Check if cmux is running
-if ! pgrep -x "GhosttyTabs" > /dev/null; then
+if ! pgrep -x "cmux" > /dev/null; then
-    echo "Error: GhosttyTabs is not running"
+    echo "Error: cmux is not running"
-    echo "Please start GhosttyTabs first"
+    echo "Please start cmux first"
     exit 1
 fi
 
-echo "GhosttyTabs is running"
+echo "cmux is running"
 echo ""
 
-# Activate GhosttyTabs
+# Activate cmux
-osascript -e 'tell application "GhosttyTabs" to activate'
+osascript -e 'tell application "cmux" to activate'
 sleep 0.5
 
 echo "Test 1: Testing Ctrl+C (SIGINT)"
@@ -56,7 +56,7 @@ echo "  If cat exited, Ctrl+D is working!"
 echo ""
 
 echo "=== Manual Verification Required ==="
-echo "Please check the GhosttyTabs window to verify:"
+echo "Please check the cmux window to verify:"
 echo "  1. The 'sleep 30' command was interrupted by Ctrl+C"
 echo "  2. The 'cat' command exited after Ctrl+D"
 echo ""

tests/test_ctrl_enter_keybind.py

@@ -3,7 +3,7 @@
 Automated test for ctrl+enter keybind using real keystrokes.
 
 Requires:
-  - GhosttyTabs running
+  - cmux running
   - Accessibility permissions for System Events (osascript)
   - keybind = ctrl+enter=text:\\r (or \\n/\\x0d) configured in Ghostty config
 """
@@ -14,10 +14,10 @@ import time
 import subprocess
 from pathlib import Path
 
-# Add the directory containing ghosttytabs.py to the path
+# Add the directory containing cmux.py to the path
 sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
 
-from ghosttytabs import GhosttyTabs, GhosttyTabsError
+from cmux import cmux, cmuxError
 
 
 def run_osascript(script: str) -> None:
@@ -54,7 +54,7 @@ def find_config_with_keybind() -> Path | None:
     return None
 
 
-def test_ctrl_enter_keybind(client: GhosttyTabs) -> tuple[bool, str]:
+def test_ctrl_enter_keybind(client: cmux) -> tuple[bool, str]:
     marker = Path("/tmp") / f"ghostty_ctrl_enter_{os.getpid()}"
     marker.unlink(missing_ok=True)
 
@@ -64,7 +64,7 @@ def test_ctrl_enter_keybind(client: GhosttyTabs) -> tuple[bool, str]:
     time.sleep(0.3)
 
     # Make sure the app is focused for keystrokes
-    run_osascript('tell application "GhosttyTabs" to activate')
+    run_osascript('tell application "cmux" to activate')
     time.sleep(0.2)
 
     # Clear any running command
@@ -94,14 +94,14 @@ def test_ctrl_enter_keybind(client: GhosttyTabs) -> tuple[bool, str]:
 
 def run_tests() -> int:
     print("=" * 60)
-    print("GhosttyTabs Ctrl+Enter Keybind Test")
+    print("cmux Ctrl+Enter Keybind Test")
     print("=" * 60)
     print()
 
-    socket_path = GhosttyTabs.DEFAULT_SOCKET_PATH
+    socket_path = cmux.DEFAULT_SOCKET_PATH
     if not os.path.exists(socket_path):
         print(f"Error: Socket not found at {socket_path}")
-        print("Please make sure GhosttyTabs is running.")
+        print("Please make sure cmux is running.")
         return 1
 
     config_path = find_config_with_keybind()
@@ -109,19 +109,19 @@ def run_tests() -> int:
         print("Error: Required keybind not found in Ghostty config.")
         print("Add a line like:")
         print("  keybind = ctrl+enter=text:\\r")
-        print("Then restart GhosttyTabs and re-run this test.")
+        print("Then restart cmux and re-run this test.")
         return 1
 
     print(f"Using keybind from: {config_path}")
     print()
 
     try:
-        with GhosttyTabs() as client:
+        with cmux() as client:
             ok, message = test_ctrl_enter_keybind(client)
             status = "✅" if ok else "❌"
             print(f"{status} {message}")
             return 0 if ok else 1
-    except GhosttyTabsError as e:
+    except cmuxError as e:
         print(f"Error: {e}")
         return 1
     except subprocess.CalledProcessError as e:

tests/test_ctrl_interactive.py

@@ -1,9 +1,9 @@
 #!/usr/bin/env python3
 """
-Interactive test for Ctrl+C and Ctrl+D in GhosttyTabs terminal.
+Interactive test for Ctrl+C and Ctrl+D in cmux terminal.
 
 This script tests that control signals are properly handled.
-Run this script inside the GhosttyTabs terminal.
+Run this script inside the cmux terminal.
 
 Tests:
 1. Ctrl+C (SIGINT) - Should interrupt a running process
@@ -72,10 +72,10 @@ def test_ctrl_d():
 
 def main():
     print("=" * 50)
-    print("GhosttyTabs Control Signal Test")
+    print("cmux Control Signal Test")
     print("=" * 50)
     print("\nThis script tests if Ctrl+C and Ctrl+D work correctly.")
-    print("Run this inside the GhosttyTabs terminal to verify the fix.\n")
+    print("Run this inside the cmux terminal to verify the fix.\n")
 
     # Check if running in a terminal
     if not os.isatty(sys.stdin.fileno()):

tests/test_ctrl_signals.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 # Test script to verify Ctrl+C and Ctrl+D work correctly in the terminal
-# Run this script inside the GhosttyTabs terminal to test signal handling
+# Run this script inside the cmux terminal to test signal handling
 
 set -e
 

tests/test_ctrl_socket.py

@@ -1,12 +1,12 @@
 #!/usr/bin/env python3
 """
-Automated tests for Ctrl+C and Ctrl+D using the GhosttyTabs socket interface.
+Automated tests for Ctrl+C and Ctrl+D using the cmux socket interface.
 
 Usage:
     python3 test_ctrl_socket.py
 
 Requirements:
-    - GhosttyTabs must be running with the socket controller enabled
+    - cmux must be running with the socket controller enabled
 """
 
 import os
@@ -15,10 +15,10 @@ import time
 import tempfile
 from pathlib import Path
 
-# Add the directory containing ghosttytabs.py to the path
+# Add the directory containing cmux.py to the path
 sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
 
-from ghosttytabs import GhosttyTabs, GhosttyTabsError
+from cmux import cmux, cmuxError
 
 
 class TestResult:
@@ -36,7 +36,7 @@ class TestResult:
         self.message = msg
 
 
-def test_connection(client: GhosttyTabs) -> TestResult:
+def test_connection(client: cmux) -> TestResult:
     """Test that we can connect and ping the server"""
     result = TestResult("Connection")
     try:
@@ -49,7 +49,7 @@ def test_connection(client: GhosttyTabs) -> TestResult:
     return result
 
 
-def test_ctrl_c(client: GhosttyTabs) -> TestResult:
+def test_ctrl_c(client: cmux) -> TestResult:
     """
     Test Ctrl+C by:
     1. Starting sleep command
@@ -88,7 +88,7 @@ def test_ctrl_c(client: GhosttyTabs) -> TestResult:
     return result
 
 
-def test_ctrl_d(client: GhosttyTabs) -> TestResult:
+def test_ctrl_d(client: cmux) -> TestResult:
     """
     Test Ctrl+D by:
     1. Running cat command
@@ -127,7 +127,7 @@ def test_ctrl_d(client: GhosttyTabs) -> TestResult:
     return result
 
 
-def test_ctrl_c_python(client: GhosttyTabs) -> TestResult:
+def test_ctrl_c_python(client: cmux) -> TestResult:
     """
     Test Ctrl+C with Python process
     """
@@ -166,20 +166,20 @@ def test_ctrl_c_python(client: GhosttyTabs) -> TestResult:
 def run_tests():
     """Run all tests"""
     print("=" * 60)
-    print("GhosttyTabs Ctrl+C/D Automated Tests")
+    print("cmux Ctrl+C/D Automated Tests")
     print("=" * 60)
     print()
 
-    socket_path = GhosttyTabs.DEFAULT_SOCKET_PATH
+    socket_path = cmux.DEFAULT_SOCKET_PATH
     if not os.path.exists(socket_path):
         print(f"Error: Socket not found at {socket_path}")
-        print("Please make sure GhosttyTabs is running.")
+        print("Please make sure cmux is running.")
         return 1
 
     results = []
 
     try:
-        with GhosttyTabs() as client:
+        with cmux() as client:
             # Test connection
             print("Testing connection...")
             results.append(test_connection(client))
@@ -215,7 +215,7 @@ def run_tests():
             print(f"  {status} {results[-1].message}")
             print()
 
-    except GhosttyTabsError as e:
+    except cmuxError as e:
         print(f"Error: {e}")
         return 1