lawrencecchen · Feb 20, 2026 · Feb 20, 2026 · chatgpt-codex-connector · Feb 20, 2026
@@ -151,16 +151,29 @@ jobs:
         run: |
           xcodebuild -scheme cmux -configuration Release -derivedDataPath build CODE_SIGNING_ALLOWED=NO build
 
-      - name: Inject Sparkle keys and nightly metadata
+      - name: Inject nightly identity and metadata
         run: |
           set -euo pipefail
-          APP_PLIST="build/Build/Products/Release/cmux.app/Contents/Info.plist"
+          APP_DIR="build/Build/Products/Release"
+          APP_PLIST="${APP_DIR}/cmux.app/Contents/Info.plist"
           SHORT_SHA="${{ needs.decide.outputs.short_sha }}"
 
+          # --- Separate app identity: "cmux NIGHTLY" with its own bundle ID ---
+          /usr/libexec/PlistBuddy -c "Set :CFBundleName cmux NIGHTLY" "$APP_PLIST"
+          /usr/libexec/PlistBuddy -c "Set :CFBundleDisplayName cmux NIGHTLY" "$APP_PLIST"
+          /usr/libexec/PlistBuddy -c "Set :CFBundleIdentifier com.cmuxterm.app.nightly" "$APP_PLIST"
+
+          # Rename the .app bundle to match the display name
+          mv "${APP_DIR}/cmux.app" "${APP_DIR}/cmux NIGHTLY.app"
+
+          # Update plist path after rename
+          APP_PLIST="${APP_DIR}/cmux NIGHTLY.app/Contents/Info.plist"
+
+          # --- Sparkle: point at the nightly appcast ---
           /usr/libexec/PlistBuddy -c "Delete :SUPublicEDKey" "$APP_PLIST" >/dev/null 2>&1 || true
           /usr/libexec/PlistBuddy -c "Delete :SUFeedURL" "$APP_PLIST" >/dev/null 2>&1 || true
           /usr/libexec/PlistBuddy -c "Add :SUPublicEDKey string ${SPARKLE_PUBLIC_KEY}" "$APP_PLIST"
-          /usr/libexec/PlistBuddy -c "Add :SUFeedURL string https://github.com/manaflow-ai/cmux/releases/latest/download/appcast.xml" "$APP_PLIST"
+          /usr/libexec/PlistBuddy -c "Add :SUFeedURL string https://github.com/manaflow-ai/cmux/releases/download/nightly/appcast.xml" "$APP_PLIST"
 
           # Marketing version: append -nightly.YYYYMMDD so users can identify the channel and date
           BASE_MARKETING=$(/usr/libexec/PlistBuddy -c "Print :CFBundleShortVersionString" "$APP_PLIST")
@@ -175,6 +188,8 @@ jobs:
           /usr/libexec/PlistBuddy -c "Delete :CMUXCommit" "$APP_PLIST" >/dev/null 2>&1 || true
           /usr/libexec/PlistBuddy -c "Add :CMUXCommit string ${SHORT_SHA}" "$APP_PLIST"
 
+          echo "Nightly app name: cmux NIGHTLY"
+          echo "Nightly bundle ID: com.cmuxterm.app.nightly"
           echo "Nightly marketing version: ${BASE_MARKETING}-nightly.${NIGHTLY_DATE}"
           echo "Nightly build number: ${NIGHTLY_BUILD}"
           echo "Commit SHA: ${SHORT_SHA}"
@@ -210,7 +225,7 @@ jobs:
             echo "Missing APPLE_SIGNING_IDENTITY secret" >&2
             exit 1
           fi
-          APP_PATH="build/Build/Products/Release/cmux.app"
+          APP_PATH="build/Build/Products/Release/cmux NIGHTLY.app"
           ENTITLEMENTS="cmux.entitlements"
           CLI_PATH="$APP_PATH/Contents/Resources/bin/cmux"
           if [ -f "$CLI_PATH" ]; then
@@ -230,9 +245,9 @@ jobs:
             echo "Missing notarization secrets (APPLE_ID, APPLE_APP_SPECIFIC_PASSWORD, APPLE_TEAM_ID)" >&2
             exit 1
           fi
-          APP_PATH="build/Build/Products/Release/cmux.app"
+          APP_PATH="build/Build/Products/Release/cmux NIGHTLY.app"
           ZIP_SUBMIT="cmux-nightly-notary.zip"
-          DMG_RELEASE="cmux-macos.dmg"
+          DMG_RELEASE="cmux-nightly-macos.dmg"
           ditto -c -k --sequesterRsrc --keepParent "$APP_PATH" "$ZIP_SUBMIT"
           APP_SUBMIT_JSON="$(xcrun notarytool submit "$ZIP_SUBMIT" --apple-id "$APPLE_ID" --team-id "$APPLE_TEAM_ID" --password "$APPLE_APP_SPECIFIC_PASSWORD" --wait --output-format json)"
           APP_SUBMIT_ID="$(python3 -c 'import json,sys; print(json.load(sys.stdin)["id"])' <<<"$APP_SUBMIT_JSON")"
@@ -250,7 +265,7 @@ jobs:
             --identity="$APPLE_SIGNING_IDENTITY" \
             "$APP_PATH" \
             ./
-          mv ./cmux*.dmg "$DMG_RELEASE"
+          mv ./"cmux NIGHTLY"*.dmg "$DMG_RELEASE" 2>/dev/null || mv ./cmux*.dmg "$DMG_RELEASE"
           DMG_SUBMIT_JSON="$(xcrun notarytool submit "$DMG_RELEASE" --apple-id "$APPLE_ID" --team-id "$APPLE_TEAM_ID" --password "$APPLE_APP_SPECIFIC_PASSWORD" --wait --output-format json)"
           DMG_SUBMIT_ID="$(python3 -c 'import json,sys; print(json.load(sys.stdin)["id"])' <<<"$DMG_SUBMIT_JSON")"
           DMG_STATUS="$(python3 -c 'import json,sys; print(json.load(sys.stdin)["status"])' <<<"$DMG_SUBMIT_JSON")"
@@ -270,7 +285,7 @@ jobs:
             echo "Missing SPARKLE_PRIVATE_KEY secret" >&2
             exit 1
           fi
-          ./scripts/sparkle_generate_appcast.sh cmux-macos.dmg nightly appcast.xml
+          ./scripts/sparkle_generate_appcast.sh cmux-nightly-macos.dmg nightly appcast.xml
 
       - name: Move nightly tag to built commit
         run: |
@@ -289,8 +304,12 @@ jobs:
           make_latest: false
           body: |
             Automated nightly build for `${{ needs.decide.outputs.short_sha }}`.
+
+            **cmux NIGHTLY** is a separate app (bundle ID `com.cmuxterm.app.nightly`) that can be installed alongside the stable release. It receives nightly updates automatically via its own Sparkle feed.
+
+            [Download cmux-nightly-macos.dmg](https://github.com/manaflow-ai/cmux/releases/download/nightly/cmux-nightly-macos.dmg)
           files: |
-            cmux-macos.dmg
+            cmux-nightly-macos.dmg
             appcast.xml
           overwrite_files: true
 

diff --git a/Sources/Update/UpdateController.swift b/Sources/Update/UpdateController.swift
@@ -31,7 +31,6 @@ class UpdateController {
             "SUEnableAutomaticChecks": false,
             "SUSendProfileInfo": false,
             "SUAutomaticallyUpdate": false,
-            UpdateChannelSettings.includeNightlyBuildsKey: UpdateChannelSettings.defaultIncludeNightlyBuilds,
         ])
 
         let hostBundle = Bundle.main

diff --git a/Sources/Update/UpdateDelegate.swift b/Sources/Update/UpdateDelegate.swift
@@ -1,26 +1,6 @@
 import Sparkle
 import Cocoa
 
-enum UpdateChannelSettings {
-    static let includeNightlyBuildsKey = "cmux.includeNightlyBuilds"
-    static let defaultIncludeNightlyBuilds = false
-
-    static let stableFeedURL = "https://github.com/manaflow-ai/cmux/releases/latest/download/appcast.xml"
-    static let nightlyFeedURL = "https://github.com/manaflow-ai/cmux/releases/download/nightly/appcast.xml"
-
-    static func resolvedFeedURLString(
-        infoFeedURL: String?,
-        defaults: UserDefaults = .standard
-    ) -> (url: String, isNightly: Bool, usedFallback: Bool) {
-        let stableURL = (infoFeedURL?.isEmpty == false) ? infoFeedURL! : stableFeedURL
-        let includeNightlyBuilds = defaults.bool(forKey: includeNightlyBuildsKey)
-        if includeNightlyBuilds {
-            return (url: nightlyFeedURL, isNightly: true, usedFallback: false)
-        }
-        return (url: stableURL, isNightly: false, usedFallback: stableURL == stableFeedURL)
-    }
-}
-
 extension UpdateDriver: SPUUpdaterDelegate {
     func feedURLString(for updater: SPUUpdater) -> String? {
 #if DEBUG
@@ -31,11 +11,15 @@ extension UpdateDriver: SPUUpdaterDelegate {
             return override
         }
 #endif
-        let infoURL = Bundle.main.object(forInfoDictionaryKey: "SUFeedURL") as? String
-        let resolved = UpdateChannelSettings.resolvedFeedURLString(infoFeedURL: infoURL)
-        UpdateLogStore.shared.append("update channel: \(resolved.isNightly ? "nightly" : "stable")")
-        recordFeedURLString(resolved.url, usedFallback: resolved.usedFallback)
-        return resolved.url
+        // The feed URL is baked into Info.plist at build time:
+        // - Stable releases use the stable appcast URL
+        // - cmux NIGHTLY has the nightly appcast URL injected by CI
+        let feedURL = Bundle.main.object(forInfoDictionaryKey: "SUFeedURL") as? String
+        let isNightly = feedURL?.contains("/nightly/") == true
+        UpdateLogStore.shared.append("update channel: \(isNightly ? "nightly" : "stable")")
+        let usedFallback = feedURL == nil || feedURL?.isEmpty == true
+        recordFeedURLString(feedURL ?? "https://github.com/manaflow-ai/cmux/releases/latest/download/appcast.xml", usedFallback: usedFallback)
+        return feedURL
     }
 
     /// Called when an update is scheduled to install silently,

diff --git a/Sources/cmuxApp.swift b/Sources/cmuxApp.swift
@@ -2239,7 +2239,6 @@ struct SettingsView: View {
     @AppStorage(BrowserSearchSettings.searchEngineKey) private var browserSearchEngine = BrowserSearchSettings.defaultSearchEngine.rawValue
     @AppStorage(BrowserSearchSettings.searchSuggestionsEnabledKey) private var browserSearchSuggestionsEnabled = BrowserSearchSettings.defaultSearchSuggestionsEnabled
     @AppStorage(NotificationBadgeSettings.dockBadgeEnabledKey) private var notificationDockBadgeEnabled = NotificationBadgeSettings.defaultDockBadgeEnabled
-    @AppStorage(UpdateChannelSettings.includeNightlyBuildsKey) private var includeNightlyBuilds = UpdateChannelSettings.defaultIncludeNightlyBuilds
     @AppStorage(WorkspacePlacementSettings.placementKey) private var newWorkspacePlacement = WorkspacePlacementSettings.defaultPlacement.rawValue
     @State private var shortcutResetToken = UUID()
     @State private var topBlurOpacity: Double = 0
@@ -2317,25 +2316,6 @@ struct SettingsView: View {
                         }
                     }
 
-                    SettingsSectionHeader(title: "Updates")
-                    SettingsCard {
-                        SettingsCardRow(
-                            "Receive Nightly Builds",
-                            subtitle: includeNightlyBuilds
-                                ? "Using nightly update channel. Builds may be less stable."
-                                : "Using stable update channel."
-                        ) {
-                            Toggle("", isOn: $includeNightlyBuilds)
-                                .labelsHidden()
-                                .controlSize(.small)
-                                .accessibilityIdentifier("SettingsIncludeNightlyBuildsToggle")
-                        }
-
-                        SettingsCardDivider()
-
-                        SettingsCardNote("Nightly builds are published from the latest main branch commit when available.")
-                    }
-
                     SettingsSectionHeader(title: "Automation")
                     SettingsCard {
                         SettingsCardRow(
@@ -2551,7 +2531,6 @@ struct SettingsView: View {
         browserSearchEngine = BrowserSearchSettings.defaultSearchEngine.rawValue
         browserSearchSuggestionsEnabled = BrowserSearchSettings.defaultSearchSuggestionsEnabled
         notificationDockBadgeEnabled = NotificationBadgeSettings.defaultDockBadgeEnabled
-        includeNightlyBuilds = UpdateChannelSettings.defaultIncludeNightlyBuilds
         newWorkspacePlacement = WorkspacePlacementSettings.defaultPlacement.rawValue
         KeyboardShortcutSettings.resetAll()
         shortcutResetToken = UUID()

diff --git a/cmuxTests/CmuxWebViewKeyEquivalentTests.swift b/cmuxTests/CmuxWebViewKeyEquivalentTests.swift
@@ -339,59 +339,6 @@ final class WorkspacePlacementSettingsTests: XCTestCase {
     }
 }
 
-final class UpdateChannelSettingsTests: XCTestCase {
-    func testDefaultNightlyPreferenceIsDisabled() {
-        XCTAssertFalse(UpdateChannelSettings.defaultIncludeNightlyBuilds)
-    }
-
-    func testResolvedFeedFallsBackToStableWhenInfoFeedMissing() {
-        let suiteName = "UpdateChannelSettingsTests.MissingInfo.\(UUID().uuidString)"
-        guard let defaults = UserDefaults(suiteName: suiteName) else {
-            XCTFail("Failed to create isolated UserDefaults suite")
-            return
-        }
-        defer { defaults.removePersistentDomain(forName: suiteName) }
-
-        let resolved = UpdateChannelSettings.resolvedFeedURLString(infoFeedURL: nil, defaults: defaults)
-        XCTAssertEqual(resolved.url, UpdateChannelSettings.stableFeedURL)
-        XCTAssertFalse(resolved.isNightly)
-        XCTAssertTrue(resolved.usedFallback)
-    }
-
-    func testResolvedFeedUsesInfoFeedForStableChannel() {
-        let suiteName = "UpdateChannelSettingsTests.InfoFeed.\(UUID().uuidString)"
-        guard let defaults = UserDefaults(suiteName: suiteName) else {
-            XCTFail("Failed to create isolated UserDefaults suite")
-            return
-        }
-        defer { defaults.removePersistentDomain(forName: suiteName) }
-
-        let infoFeed = "https://example.com/custom/appcast.xml"
-        let resolved = UpdateChannelSettings.resolvedFeedURLString(infoFeedURL: infoFeed, defaults: defaults)
-        XCTAssertEqual(resolved.url, infoFeed)
-        XCTAssertFalse(resolved.isNightly)
-        XCTAssertFalse(resolved.usedFallback)
-    }
-
-    func testResolvedFeedUsesNightlyWhenPreferenceEnabled() {
-        let suiteName = "UpdateChannelSettingsTests.Nightly.\(UUID().uuidString)"
-        guard let defaults = UserDefaults(suiteName: suiteName) else {
-            XCTFail("Failed to create isolated UserDefaults suite")
-            return
-        }
-        defer { defaults.removePersistentDomain(forName: suiteName) }
-
-        defaults.set(true, forKey: UpdateChannelSettings.includeNightlyBuildsKey)
-        let resolved = UpdateChannelSettings.resolvedFeedURLString(
-            infoFeedURL: "https://example.com/custom/appcast.xml",
-            defaults: defaults
-        )
-        XCTAssertEqual(resolved.url, UpdateChannelSettings.nightlyFeedURL)
-        XCTAssertTrue(resolved.isNightly)
-        XCTAssertFalse(resolved.usedFallback)
-    }
-}
-
 final class WorkspaceReorderTests: XCTestCase {
     @MainActor
     func testReorderWorkspaceMovesWorkspaceToRequestedIndex() {