diff --git a/Sources/AppDelegate.swift b/Sources/AppDelegate.swift
index cd623863..f1769ec7 100644
--- a/Sources/AppDelegate.swift
+++ b/Sources/AppDelegate.swift
@@ -2705,6 +2705,11 @@ final class AppDelegate: NSObject, NSApplicationDelegate, UNUserNotificationCent
         isTerminatingApp = true
         _ = saveSessionSnapshot(includeScrollback: true, removeWhenEmpty: false)
 
+        // Tagged DEV builds are ephemeral, skip quit confirmation entirely.
+        if SocketControlSettings.isTaggedDevBuild() {
+            return .terminateNow
+        }
+
         // If the user already confirmed via the Cmd+Q shortcut warning dialog
         // (handleQuitShortcutWarning), skip the check to avoid a second alert.
         if isQuitWarningConfirmed {
@@ -9005,6 +9010,12 @@ final class AppDelegate: NSObject, NSApplicationDelegate, UNUserNotificationCent
     }
 
     private func handleQuitShortcutWarning() -> Bool {
+        // Tagged DEV builds are ephemeral, skip quit confirmation entirely.
+        if SocketControlSettings.isTaggedDevBuild() {
+            NSApp.terminate(nil)
+            return true
+        }
+
         if !QuitWarningSettings.isEnabled() {
             NSApp.terminate(nil)
             return true
diff --git a/Sources/SocketControlSettings.swift b/Sources/SocketControlSettings.swift
index 8d44e573..9524cf51 100644
--- a/Sources/SocketControlSettings.swift
+++ b/Sources/SocketControlSettings.swift
@@ -533,6 +533,12 @@ struct SocketControlSettings {
             || bundleIdentifier.hasPrefix("com.cmuxterm.app.debug.")
     }
 
+    /// Tagged DEV builds have bundle IDs like `com.cmuxterm.app.debug.<tag>`.
+    static func isTaggedDevBuild(bundleIdentifier: String? = Bundle.main.bundleIdentifier) -> Bool {
+        guard let bundleIdentifier else { return false }
+        return bundleIdentifier.hasPrefix("\(baseDebugBundleIdentifier).")
+    }
+
     static func taggedDebugSocketPath(
         bundleIdentifier: String?,
         environment: [String: String]