diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index df3a78ac..b57bad5c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -30,6 +30,9 @@ jobs:
       - name: Validate Release Workflow
         run: bash Scripts/test-release-workflow.sh
 
+      - name: Test Release Cleanliness Check
+        run: bash Scripts/test-check-host-release-clean.sh
+
       - name: Sync Derived Source
         run: bash Scripts/sync-derived-source.sh
 
diff --git a/LookInside/About/AboutWindowController.swift b/LookInside/About/AboutWindowController.swift
index ae3401bf..1b679791 100644
--- a/LookInside/About/AboutWindowController.swift
+++ b/LookInside/About/AboutWindowController.swift
@@ -9,7 +9,7 @@
 import AppKit
 
 final class AboutWindowController: WindowController {
-    @objc init() {
+    init() {
         let window = AppWindow(contentRect: NSRect(x: 0, y: 0, width: 480, height: 460),
                               styleMask: [.titled, .closable, .fullSizeContentView],
                               backing: .buffered, defer: true)
diff --git a/LookInside/AppDelegate.swift b/LookInside/AppDelegate.swift
index 3204d7f5..24f4184f 100644
--- a/LookInside/AppDelegate.swift
+++ b/LookInside/AppDelegate.swift
@@ -11,7 +11,6 @@ import FoundationToolbox
 
 @Loggable(subsystem: "com.lookinside.app")
 @main
-@objc(AppDelegate)
 @MainActor
 final class AppDelegate: NSObject, NSApplicationDelegate {
     private var appearanceObservation: NSKeyValueObservation?
diff --git a/LookInside/Base/BaseControl.swift b/LookInside/Base/BaseControl.swift
index c31962e3..40a0cfbd 100644
--- a/LookInside/Base/BaseControl.swift
+++ b/LookInside/Base/BaseControl.swift
@@ -9,11 +9,11 @@
 import AppKit
 
 class BaseControl: NSControl {
-    @objc var clickAction: Selector?
+    var clickAction: Selector?
 
-    @objc var adjustAlphaWhenClick = false
+    var adjustAlphaWhenClick = false
 
-    @objc var didChangeAppearance: ((BaseControl?, Bool) -> Void)? {
+    var didChangeAppearance: ((BaseControl?, Bool) -> Void)? {
         didSet {
             triggerDidChangeAppearanceBlock()
         }
@@ -47,13 +47,12 @@ class BaseControl: NSControl {
         }
     }
 
-    @objc(addTarget:clickAction:)
     func addTarget(_ target: AnyObject?, clickAction action: Selector?) {
         self.target = target
         clickAction = action
     }
 
-    @objc func triggerClickAction() {
+    func triggerClickAction() {
         if let clickAction, target != nil {
             sendAction(clickAction, to: target)
         }
@@ -74,7 +73,7 @@ class BaseControl: NSControl {
     }
 
     /// 如果子类返回 true，则 mouseEntered: 和 mouseExited: 会被调用。默认为 false
-    @objc func shouldTrackMouseEnteredAndExited() -> Bool {
+    func shouldTrackMouseEnteredAndExited() -> Bool {
         false
     }
 
diff --git a/LookInside/Base/BaseView.swift b/LookInside/Base/BaseView.swift
index 60df43fc..79822666 100644
--- a/LookInside/Base/BaseView.swift
+++ b/LookInside/Base/BaseView.swift
@@ -10,7 +10,7 @@ import AppKit
 
 private let effectiveAppearanceContext = UnsafeMutableRawPointer.allocate(byteCount: 1, alignment: 1)
 
-@objc enum ViewBorderPosition: Int {
+enum ViewBorderPosition: Int {
     case none
     case top
     case left
diff --git a/LookInside/Base/Category/AttributesGroup+LookinClient.swift b/LookInside/Base/Category/AttributesGroup+LookinClient.swift
index 470a4c46..52a78f1d 100644
--- a/LookInside/Base/Category/AttributesGroup+LookinClient.swift
+++ b/LookInside/Base/Category/AttributesGroup+LookinClient.swift
@@ -9,7 +9,6 @@ extension AttributesGroup {
     /// The group's card title. `isMacTarget` describes the inspected app,
     /// not the Host; it only changes the ViewLayer group, whose title names
     /// the view class (`NSView` vs `UIView`), and the layout guide group.
-    @objc(queryDisplayTitleForMacTarget:)
     func queryDisplayTitle(forMacTarget isMacTarget: Bool) -> String {
         if let userCustomTitle, !userCustomTitle.isEmpty {
             return userCustomTitle
diff --git a/LookInside/Base/Category/AutoLayoutConstraint+LookinClient.swift b/LookInside/Base/Category/AutoLayoutConstraint+LookinClient.swift
index 50ddec89..d7e9eca2 100644
--- a/LookInside/Base/Category/AutoLayoutConstraint+LookinClient.swift
+++ b/LookInside/Base/Category/AutoLayoutConstraint+LookinClient.swift
@@ -11,7 +11,6 @@ import AppKit
 import LookInsideHostCore
 
 extension AutoLayoutConstraint {
-    @objc(descriptionWithItemObject:type:detailed:)
     static func description(withItemObject object: InspectedObject?, type: LookinConstraintItemType, detailed: Bool) -> String {
         switch type {
         case .`nil`:
@@ -32,7 +31,6 @@ extension AutoLayoutConstraint {
         }
     }
 
-    @objc(descriptionWithAttributeInt:)
     static func description(withAttributeInt attribute: Int) -> String {
         if let name = ClientDisplayText.layoutAttributeName(attribute) {
             return name
@@ -41,7 +39,6 @@ extension AutoLayoutConstraint {
         return "unknownAttr(\(attribute))"
     }
 
-    @objc(symbolWithRelation:)
     static func symbol(with relation: NSLayoutConstraint.Relation) -> String {
         if let symbol = ClientDisplayText.layoutRelationSymbol(relation.rawValue) {
             return symbol
@@ -50,7 +47,6 @@ extension AutoLayoutConstraint {
         return "?"
     }
 
-    @objc(descriptionWithRelation:)
     static func description(with relation: NSLayoutConstraint.Relation) -> String {
         if let name = ClientDisplayText.layoutRelationName(relation.rawValue) {
             return name
diff --git a/LookInside/Base/Category/DisplayItem+LookinClient.swift b/LookInside/Base/Category/DisplayItem+LookinClient.swift
index 3174f965..d595fd3f 100644
--- a/LookInside/Base/Category/DisplayItem+LookinClient.swift
+++ b/LookInside/Base/Category/DisplayItem+LookinClient.swift
@@ -14,7 +14,7 @@ import LookInsideHostCore
 
 extension DisplayItem {
     /// The row text in the hierarchy, usually the class name without module.
-    @objc func title() -> String {
+    func title() -> String {
         let baseTitle: String?
         if let customInfo {
             baseTitle = customInfo.title
@@ -28,7 +28,7 @@ extension DisplayItem {
 
     /// The owning window or view controller, a special trace, or the ivar
     /// names that point at the object; nil when there is none.
-    @objc func subtitle() -> String? {
+    func subtitle() -> String? {
         if let customInfo {
             return customInfo.subtitle
         }
@@ -51,7 +51,7 @@ extension DisplayItem {
 
     /// The solo screenshot once children that draw something are shown on
     /// their own; the group screenshot otherwise.
-    @objc func appropriateScreenshot() -> NSImage? {
+    func appropriateScreenshot() -> NSImage? {
         // A node whose children are all pixelless (layout guides, cells, a
         // view's outer layer) has nothing to exclude, and a leaf view has no
         // solo screenshot at all — asking for one there blanks it out.
@@ -61,7 +61,6 @@ extension DisplayItem {
         return groupScreenshot
     }
 
-    @objc(bestObjectOidPreferView:)
     func bestObjectOidPreferView(_: Bool) -> UInt {
         switch resolvedNodeKind() {
         case .window, .windowScene:
@@ -99,7 +98,7 @@ extension DisplayItem {
     /// layer oid (backing-layer toggle ON); requests for this node must then
     /// route by the view oid. Read off the tree rather than the preference,
     /// so it stays false against servers that ignored the toggle.
-    @objc func ownsSeparateBackingLayerNode() -> Bool {
+    func ownsSeparateBackingLayerNode() -> Bool {
         guard let layerOid = layerObject?.oid, layerOid != 0,
               let viewOid = viewObject?.oid, viewOid != 0
         else { return false }
@@ -119,7 +118,6 @@ extension DisplayItem {
     }
 
     /// The preferred oid first, then every other oid this node carries.
-    @objc(availableObjectOidsPreferView:)
     func availableObjectOidsPreferView(_ preferView: Bool) -> [NSNumber] {
         var oids: [UInt] = []
         func add(_ oid: UInt?) {
@@ -135,24 +133,24 @@ extension DisplayItem {
     }
 
     /// Whether the title starts like a system class ("UI", "CA", "NS", "_").
-    @objc var representedForSystemClass: Bool {
+    var representedForSystemClass: Bool {
         let title = title()
         return title.hasPrefix("UI") || title.hasPrefix("CA") || title.hasPrefix("_") || title.hasPrefix("NS")
     }
 
-    @objc func isUserCustom() -> Bool {
+    func isUserCustom() -> Bool {
         customInfo != nil
     }
 
     /// Whether the preview can draw a box for this node.
-    @objc func hasPreviewBoxAbility() -> Bool {
+    func hasPreviewBoxAbility() -> Bool {
         guard let customInfo else { return true }
         return customInfo.hasValidFrame()
     }
 
     /// Whether an expanded node shows its group screenshot in the preview
     /// because its solo screenshot is (nearly) empty.
-    @objc func usesGroupScreenshotFallbackInPreview() -> Bool {
+    func usesGroupScreenshotFallbackInPreview() -> Bool {
         guard isExpandable, isExpanded else { return false }
         // A window root's solo screenshot is always nearly transparent (just
         // the frame) — its children draw the content. Falling back here
@@ -170,7 +168,7 @@ extension DisplayItem {
         )
     }
 
-    @objc func hasAncestorUsingGroupScreenshotFallbackInPreview() -> Bool {
+    func hasAncestorUsingGroupScreenshotFallbackInPreview() -> Bool {
         var found = false
         enumerateAncestors { item, stop in
             if item.usesGroupScreenshotFallbackInPreview() {
@@ -183,7 +181,6 @@ extension DisplayItem {
 
     /// Whether the node matches a non-empty hierarchy filter: its title,
     /// subtitle or one of its objects' addresses contains the text.
-    @objc(isMatchedWithSearchString:)
     func isMatched(withSearch string: String) -> Bool {
         if string.isEmpty {
             assertionFailure("an empty search string matches nothing")
@@ -207,7 +204,6 @@ extension DisplayItem {
     }
 
     /// Visits this item, then each ancestor up to the root, until stopped.
-    @objc(enumerateSelfAndAncestors:)
     func enumerateSelfAndAncestors(_ block: (DisplayItem, UnsafeMutablePointer<ObjCBool>) -> Void) {
         var item: DisplayItem? = self
         while let current = item {
@@ -220,13 +216,11 @@ extension DisplayItem {
         }
     }
 
-    @objc(enumerateAncestors:)
     func enumerateAncestors(_ block: (DisplayItem, UnsafeMutablePointer<ObjCBool>) -> Void) {
         self.`super`?.enumerateSelfAndAncestors(block)
     }
 
     /// Visits this item and then its whole subtree, depth first.
-    @objc(enumerateSelfAndChildren:)
     func enumerateSelfAndChildren(_ block: (DisplayItem) -> Void) {
         block(self)
         for subitem in subitems ?? [] {
@@ -234,14 +228,12 @@ extension DisplayItem {
         }
     }
 
-    @objc(itemIsKindOfClassWithName:)
     func itemIsKindOfClass(withName className: String) -> Bool {
         itemIsKindOfClasses(withNames: [className])
     }
 
     /// Whether any class in the displayed object's class chain, without its
     /// module prefix, is one of `classNames`.
-    @objc(itemIsKindOfClassesWithNames:)
     func itemIsKindOfClasses(withNames classNames: Set<String>) -> Bool {
         guard !classNames.isEmpty, let object = displayingObject() else { return false }
         let chain = object.classChainList ?? []
@@ -252,7 +244,7 @@ extension DisplayItem {
 
     // MARK: - SwiftUI
 
-    @objc func isSwiftUISupportRelated() -> Bool {
+    func isSwiftUISupportRelated() -> Bool {
         func looksLikeSwiftUISupport(_ object: InspectedObject?) -> Bool {
             guard let object else { return false }
             if ClientDisplayText.looksLikeSwiftUISupport(object.rawClassName()) {
@@ -270,7 +262,7 @@ extension DisplayItem {
 
     /// Addresses of the layers named by "… Backed By" rows in the
     /// "SwiftUI Layers" group.
-    @objc func swiftUIBackingLayerMemoryAddresses() -> [String] {
+    func swiftUIBackingLayerMemoryAddresses() -> [String] {
         var addresses: [String] = []
         for group in allAttributeGroups where group.userCustomTitle == "SwiftUI Layers" {
             for attribute in group.allAttributes {
@@ -287,7 +279,7 @@ extension DisplayItem {
 
     /// Display-list IDs from "… Display List ID" rows of "SwiftUI Layers"
     /// and "Identity IDs" rows of "SwiftUI Display List".
-    @objc func swiftUIBackingDisplayListIDs() -> [NSNumber] {
+    func swiftUIBackingDisplayListIDs() -> [NSNumber] {
         var displayListIDs: [UInt64] = []
         for group in allAttributeGroups {
             let isLayersGroup = group.userCustomTitle == "SwiftUI Layers"
@@ -308,7 +300,7 @@ extension DisplayItem {
     }
 
     /// The first "Display List ID" of the "SwiftUI" group, for layer nodes.
-    @objc func swiftUILayerDisplayListID() -> NSNumber? {
+    func swiftUILayerDisplayListID() -> NSNumber? {
         guard layerObject != nil else { return nil }
         for group in allAttributeGroups where group.userCustomTitle == "SwiftUI" {
             for attribute in group.allAttributes {
@@ -322,7 +314,7 @@ extension DisplayItem {
     }
 
     /// "Source" and "Full Source" values of the "SwiftUI" group.
-    @objc func swiftUILayerSourceTypeNames() -> [String] {
+    func swiftUILayerSourceTypeNames() -> [String] {
         var sourceNames: [String] = []
         for group in allAttributeGroups where group.userCustomTitle == "SwiftUI" {
             for attribute in group.allAttributes {
@@ -337,7 +329,7 @@ extension DisplayItem {
 
     /// The custom node's title, then "Type" and "Full Type" values of the
     /// "SwiftUI Type" group.
-    @objc func swiftUITypeNames() -> [String] {
+    func swiftUITypeNames() -> [String] {
         var typeNames: [String] = []
         if let customTitle = customInfo?.title {
             typeNames.append(customTitle)
@@ -353,12 +345,10 @@ extension DisplayItem {
         return typeNames
     }
 
-    @objc(lk_validSwiftUIDisplayListIDsInString:)
     static func validSwiftUIDisplayListIDs(in string: String) -> [NSNumber] {
         ClientDisplayText.swiftUIDisplayListIDs(in: string).map { NSNumber(value: $0) }
     }
 
-    @objc(lk_memoryAddressInObjectDescription:)
     static func memoryAddress(inObjectDescription description: String) -> String? {
         ClientDisplayText.memoryAddress(inObjectDescription: description)
     }
diff --git a/LookInside/Base/Category/InspectedObject+LookinClient.swift b/LookInside/Base/Category/InspectedObject+LookinClient.swift
index edce78b3..960776be 100644
--- a/LookInside/Base/Category/InspectedObject+LookinClient.swift
+++ b/LookInside/Base/Category/InspectedObject+LookinClient.swift
@@ -8,13 +8,13 @@ import LookInsideHostCore
 
 extension InspectedObject {
     /// The demangled class name, module prefix included.
-    @objc func completedDemangledClassName() -> String {
+    func completedDemangledClassName() -> String {
         SwiftDemangler.completedParse(input: rawClassName() ?? "")
     }
 
     /// The demangled class name without its module prefix; generic
     /// arguments keep theirs.
-    @objc func simpleDemangledClassName() -> String {
+    func simpleDemangledClassName() -> String {
         ClientDisplayText.removingModulePrefix(SwiftDemangler.simpleParse(input: rawClassName() ?? ""))
     }
 }
diff --git a/LookInside/Base/Category/NSAppearance+LookinClient.swift b/LookInside/Base/Category/NSAppearance+LookinClient.swift
index 3fb1cf64..fb1aef1e 100644
--- a/LookInside/Base/Category/NSAppearance+LookinClient.swift
+++ b/LookInside/Base/Category/NSAppearance+LookinClient.swift
@@ -8,7 +8,7 @@ import AppKit
 extension NSAppearance {
     /// Whether this is one of the dark appearances, including the vibrant
     /// and high-contrast variants.
-    @objc var isDarkMode: Bool {
+    var isDarkMode: Bool {
         [.darkAqua, .vibrantDark, .accessibilityHighContrastDarkAqua, .accessibilityHighContrastVibrantDark].contains(name)
     }
 }
diff --git a/LookInside/Base/Category/NSArray+LookinClient.swift b/LookInside/Base/Category/NSArray+LookinClient.swift
index 6d3ff62b..da029c8c 100644
--- a/LookInside/Base/Category/NSArray+LookinClient.swift
+++ b/LookInside/Base/Category/NSArray+LookinClient.swift
@@ -7,7 +7,7 @@ import AppKit
 
 extension NSArray {
     /// The views that are not hidden. Every element must be an NSView.
-    @objc func visibleViews() -> [Any] {
+    func visibleViews() -> [Any] {
         filter { object in
             guard let view = object as? NSView else {
                 assertionFailure("visibleViews expects views only")
diff --git a/LookInside/Base/Category/NSButton+LookinClient.swift b/LookInside/Base/Category/NSButton+LookinClient.swift
index c0f03bf2..9c1ae81c 100644
--- a/LookInside/Base/Category/NSButton+LookinClient.swift
+++ b/LookInside/Base/Category/NSButton+LookinClient.swift
@@ -7,7 +7,6 @@ import AppKit
 
 extension NSButton {
     /// A rounded push button, already sized 84×40.
-    @objc(lk_normalButtonWithTitle:target:action:)
     static func normalButton(withTitle title: String, target: AnyObject?, action: Selector?) -> NSButton {
         let button = NSButton()
         button.bezelStyle = .rounded
@@ -20,7 +19,6 @@ extension NSButton {
     }
 
     /// A borderless image-only button; size it yourself.
-    @objc(lk_buttonWithImage:target:action:)
     static func borderlessImageButton(with image: NSImage?, target: AnyObject?, action: Selector?) -> NSButton {
         let button = NSButton()
         button.image = image
diff --git a/LookInside/Base/Category/NSColor+LookinClient.swift b/LookInside/Base/Category/NSColor+LookinClient.swift
index 3a09e779..8f45f38b 100644
--- a/LookInside/Base/Category/NSColor+LookinClient.swift
+++ b/LookInside/Base/Category/NSColor+LookinClient.swift
@@ -15,13 +15,13 @@ extension NSColor {
     }
 
     /// "(15, 17, 19)" when opaque, "(15, 17, 19, 0.50)" otherwise.
-    @objc func rgbaString() -> String {
+    func rgbaString() -> String {
         let rgba = sRGBComponentValues
         return ClientDisplayText.rgbaString(red: rgba.red, green: rgba.green, blue: rgba.blue, alpha: rgba.alpha)
     }
 
     /// "#0f1113" when opaque, "#0f111380" otherwise.
-    @objc func hexString() -> String {
+    func hexString() -> String {
         let rgba = sRGBComponentValues
         return ClientDisplayText.hexString(red: rgba.red, green: rgba.green, blue: rgba.blue, alpha: rgba.alpha)
     }
diff --git a/LookInside/Base/Category/NSControl+LookinClient.swift b/LookInside/Base/Category/NSControl+LookinClient.swift
index c5e1eadd..8b51ff11 100644
--- a/LookInside/Base/Category/NSControl+LookinClient.swift
+++ b/LookInside/Base/Category/NSControl+LookinClient.swift
@@ -8,20 +8,19 @@ import AppKit
 extension NSControl {
     private static let unlimitedSize = NSSize(width: CGFloat.greatestFiniteMagnitude, height: .greatestFiniteMagnitude)
 
-    @objc(heightForWidth:)
     func height(forWidth width: CGFloat) -> CGFloat {
         sizeThatFits(NSSize(width: width, height: .greatestFiniteMagnitude)).height
     }
 
-    @objc func bestHeight() -> CGFloat {
+    func bestHeight() -> CGFloat {
         sizeThatFits(Self.unlimitedSize).height
     }
 
-    @objc func bestWidth() -> CGFloat {
+    func bestWidth() -> CGFloat {
         sizeThatFits(Self.unlimitedSize).width
     }
 
-    @objc func bestSize() -> NSSize {
+    func bestSize() -> NSSize {
         sizeThatFits(Self.unlimitedSize)
     }
 }
diff --git a/LookInside/Base/Category/NSString+LookinClient.swift b/LookInside/Base/Category/NSString+LookinClient.swift
index 0917812b..e055a049 100644
--- a/LookInside/Base/Category/NSString+LookinClient.swift
+++ b/LookInside/Base/Category/NSString+LookinClient.swift
@@ -8,24 +8,21 @@ import LookInsideHostCore
 
 extension NSString {
     /// The string with its first UTF-16 unit uppercased; nil when empty.
-    @objc func capitalizingFirstLetter() -> String? {
+    func capitalizingFirstLetter() -> String? {
         guard length > 0 else { return nil }
         return (substring(to: 1) as NSString).uppercased + substring(from: 1)
     }
 
-    @objc(scoreAgainst:)
     func score(against otherString: String) -> CGFloat {
         score(against: otherString, fuzziness: nil)
     }
 
-    @objc(scoreAgainst:fuzziness:)
     func score(against otherString: String, fuzziness: NSNumber?) -> CGFloat {
         score(against: otherString, fuzziness: fuzziness, options: StringScore.Options.none.rawValue)
     }
 
     /// Fuzzy match score of `otherString` (an abbreviation) against this
     /// string; `options` takes the NSStringScoreOption bits.
-    @objc(scoreAgainst:fuzziness:options:)
     func score(against otherString: String, fuzziness: NSNumber?, options: UInt) -> CGFloat {
         StringScore.score(self as String, against: otherString, fuzziness: fuzziness?.doubleValue, options: StringScore.Options(rawValue: options))
     }
diff --git a/LookInside/Base/Category/NSView+LookinClient.swift b/LookInside/Base/Category/NSView+LookinClient.swift
index 2e0c633e..c5124912 100644
--- a/LookInside/Base/Category/NSView+LookinClient.swift
+++ b/LookInside/Base/Category/NSView+LookinClient.swift
@@ -15,7 +15,7 @@ extension NSView {
 
     /// An asset catalog colour name painted onto the layer's background; nil
     /// clears it.
-    @objc var backgroundColorName: String? {
+    var backgroundColorName: String? {
         get {
             objc_getAssociatedObject(self, &backgroundColorNameKey) as? String
         }
@@ -30,7 +30,6 @@ extension NSView {
     }
 
     /// Adds `view` below every existing subview.
-    @objc(lk_insertSubviewAtBottom:)
     func insertSubviewAtBottom(_ view: NSView) {
         if let first = subviews.first {
             addSubview(view, positioned: .below, relativeTo: first)
@@ -39,7 +38,7 @@ extension NSView {
         }
     }
 
-    @objc func showDebugBorder() {
+    func showDebugBorder() {
         layer?.borderWidth = 1
         layer?.borderColor = NSColor.white.cgColor
     }
diff --git a/LookInside/Base/ColorIndicatorLayer.swift b/LookInside/Base/ColorIndicatorLayer.swift
index 736198f0..ef614d99 100644
--- a/LookInside/Base/ColorIndicatorLayer.swift
+++ b/LookInside/Base/ColorIndicatorLayer.swift
@@ -12,7 +12,7 @@ class ColorIndicatorLayer: CALayer {
     private var imageLayer: CALayer?
 
     /// Defaults to black.
-    @objc var color: NSColor? = .rgb255(0, 0, 0) {
+    var color: NSColor? = .rgb255(0, 0, 0) {
         didSet { updateForColor() }
     }
 
@@ -82,7 +82,6 @@ class ColorIndicatorLayer: CALayer {
     private static let renderingLayer = ColorIndicatorLayer()
 
     /// The swatch drawn into an image of `shapeSize` plus `insets`.
-    @objc(imageWithColor:shapeSize:insets:)
     static func image(with color: NSColor?, shapeSize: NSSize, insets: NSEdgeInsets) -> NSImage {
         let layer = renderingLayer
         let image = NSImage(size: NSSize(width: shapeSize.width + insets.left + insets.right, height: shapeSize.height + insets.top + insets.bottom))
diff --git a/LookInside/Base/ConnectionTipsBinding.swift b/LookInside/Base/ConnectionTipsBinding.swift
index 50f10703..79ba32cd 100644
--- a/LookInside/Base/ConnectionTipsBinding.swift
+++ b/LookInside/Base/ConnectionTipsBinding.swift
@@ -17,7 +17,6 @@ final class ConnectionTipsBinding: NSObject {
     /// Starts observing right away and applies the current state. Holds the
     /// tips view and view controller weakly; observation stops when the
     /// binding is released.
-    @objc(initWithDocument:tipsView:viewController:)
     init(document: LiveDocument, tipsView: RedTipsView, viewController: NSViewController) {
         super.init()
         observations = [
diff --git a/LookInside/Base/DeviceIconProvider.swift b/LookInside/Base/DeviceIconProvider.swift
index 658572cc..14df1661 100644
--- a/LookInside/Base/DeviceIconProvider.swift
+++ b/LookInside/Base/DeviceIconProvider.swift
@@ -16,14 +16,14 @@ import UIFoundationToolbox
 final class DeviceIconProvider: NSObject {
     /// Height of the device icon in the window toolbar, matching the legacy
     /// `icon_*_small` assets (32 pixels at 2x).
-    @objc static let toolbarPointSize: CGFloat = 16
+    static let toolbarPointSize: CGFloat = 16
 
     /// Height of the device icon in a tips view, whose image view has a fixed 18×18 frame.
-    @objc static let tipsPointSize: CGFloat = 18
+    static let tipsPointSize: CGFloat = 18
 
     /// Height of the device icon on a launch app card, matching the legacy `icon_*_big`
     /// assets (72 pixels at 2x).
-    @objc static let launchPointSize: CGFloat = 36
+    static let launchPointSize: CGFloat = 36
 
     /// The fraction of its square canvas that CoreTypes device artwork actually fills;
     /// the rest is transparent padding. Measured from the shipped icns at several sizes.
@@ -35,7 +35,6 @@ final class DeviceIconProvider: NSObject {
     /// - Parameters:
     ///   - appInfo: The inspected app's info, as reported by LookinServer.
     ///   - pointSize: The height the icon is laid out at, in points.
-    @objc(deviceIconForAppInfo:pointSize:)
     static func deviceIcon(forAppInfo appInfo: InspectedAppInfo?, pointSize: CGFloat) -> NSImage? {
         guard let appInfo,
               let modelIdentifier = appInfo.deviceModelIdentifier,
diff --git a/LookInside/Base/FrameLayout.swift b/LookInside/Base/FrameLayout.swift
index 9540c2b9..3f9fa00f 100644
--- a/LookInside/Base/FrameLayout.swift
+++ b/LookInside/Base/FrameLayout.swift
@@ -90,20 +90,17 @@ final class FrameLayout: NSObject {
     }
 
     /// ObjC entry point: `[LKFrameLayout of:view]`.
-    @objc(of:)
     static func of(_ object: AnyObject?) -> FrameLayout {
         FrameLayout([object])
     }
 
     /// ObjC entry point for several views or layers at once.
-    @objc(ofAll:)
     static func ofAll(_ objects: [AnyObject]) -> FrameLayout {
         FrameLayout(objects)
     }
 
     /// Rounds up to the main screen's pixel grid. `CGFLOAT_MIN` and
     /// `CGFLOAT_MAX` pass through because callers use them as markers.
-    @objc
     static func snapToPixel(_ value: CGFloat) -> CGFloat {
         if value == .leastNormalMagnitude || value == .greatestFiniteMagnitude {
             return value
@@ -128,7 +125,7 @@ final class FrameLayout: NSObject {
 
     /// Sizes an BaseView or NSControl to `sizeThatFits:` of an unlimited
     /// size; other views and layers are left alone.
-    @objc @discardableResult
+    @discardableResult
     func sizeToFit() -> FrameLayout {
         each { target in
             guard case let .view(view) = target else { return }
@@ -155,7 +152,7 @@ final class FrameLayout: NSObject {
 
     /// Sets an BaseView's or NSControl's height to what it needs at its
     /// current width.
-    @objc @discardableResult
+    @discardableResult
     func heightToFit() -> FrameLayout {
         each { target in
             guard case let .view(view) = target else { return }
@@ -174,27 +171,27 @@ final class FrameLayout: NSObject {
         return self
     }
 
-    @objc(width:) @discardableResult
+    @discardableResult
     func width(_ value: CGFloat) -> FrameLayout {
         let value = Self.checked(value)
         each { $0.frame.size.width = Self.snapToPixel(value) }
         return self
     }
 
-    @objc(height:) @discardableResult
+    @discardableResult
     func height(_ value: CGFloat) -> FrameLayout {
         let value = Self.checked(value)
         each { $0.frame.size.height = Self.snapToPixel(value) }
         return self
     }
 
-    @objc(size:) @discardableResult
+    @discardableResult
     func size(_ value: NSSize) -> FrameLayout {
         width(value.width).height(value.height)
     }
 
     /// Grows the width to `value` when it is narrower; never snaps.
-    @objc(minWidth:) @discardableResult
+    @discardableResult
     func minWidth(_ value: CGFloat) -> FrameLayout {
         if value.isNaN {
             assertionFailure("NaN passed to minWidth")
@@ -210,26 +207,26 @@ final class FrameLayout: NSObject {
 
     // MARK: - Position
 
-    @objc(x:) @discardableResult
+    @discardableResult
     func x(_ value: CGFloat) -> FrameLayout {
         let value = Self.checked(value)
         each { $0.frame.origin.x = Self.snapToPixel(value) }
         return self
     }
 
-    @objc(y:) @discardableResult
+    @discardableResult
     func y(_ value: CGFloat) -> FrameLayout {
         let value = Self.checked(value)
         each { $0.frame.origin.y = Self.snapToPixel(value) }
         return self
     }
 
-    @objc(offsetX:) @discardableResult
+    @discardableResult
     func offsetX(_ value: CGFloat) -> FrameLayout {
         offset(x: value, y: 0)
     }
 
-    @objc(offsetY:) @discardableResult
+    @discardableResult
     func offsetY(_ value: CGFloat) -> FrameLayout {
         offset(x: 0, y: value)
     }
@@ -246,28 +243,28 @@ final class FrameLayout: NSObject {
         return self
     }
 
-    @objc(midX:) @discardableResult
+    @discardableResult
     func midX(_ value: CGFloat) -> FrameLayout {
         let value = Self.checked(value)
         each { FrameLayout(targets: [$0]).x(value - $0.bounds.width / 2) }
         return self
     }
 
-    @objc(maxX:) @discardableResult
+    @discardableResult
     func maxX(_ value: CGFloat) -> FrameLayout {
         let value = Self.checked(value)
         each { FrameLayout(targets: [$0]).x(value - $0.bounds.width) }
         return self
     }
 
-    @objc(midY:) @discardableResult
+    @discardableResult
     func midY(_ value: CGFloat) -> FrameLayout {
         let value = Self.checked(value)
         each { FrameLayout(targets: [$0]).y(value - $0.bounds.height / 2) }
         return self
     }
 
-    @objc(maxY:) @discardableResult
+    @discardableResult
     func maxY(_ value: CGFloat) -> FrameLayout {
         let value = Self.checked(value)
         each { FrameLayout(targets: [$0]).y(value - $0.bounds.height) }
@@ -275,7 +272,7 @@ final class FrameLayout: NSObject {
     }
 
     /// Puts the right edge `value` points from the parent's right edge.
-    @objc(right:) @discardableResult
+    @discardableResult
     func right(_ value: CGFloat) -> FrameLayout {
         let value = Self.checked(value)
         each { target in
@@ -290,7 +287,7 @@ final class FrameLayout: NSObject {
 
     /// Puts the bottom edge `value` points from the parent's bottom edge,
     /// in the parent's own (possibly unflipped) coordinates.
-    @objc(bottom:) @discardableResult
+    @discardableResult
     func bottom(_ value: CGFloat) -> FrameLayout {
         let value = Self.checked(value)
         each { target in
@@ -307,7 +304,7 @@ final class FrameLayout: NSObject {
         return self
     }
 
-    @objc @discardableResult
+    @discardableResult
     func horAlign() -> FrameLayout {
         each { target in
             guard let parentBounds = target.parentBounds else {
@@ -319,7 +316,7 @@ final class FrameLayout: NSObject {
         return self
     }
 
-    @objc @discardableResult
+    @discardableResult
     func verAlign() -> FrameLayout {
         each { target in
             guard let parentBounds = target.parentBounds else {
@@ -333,12 +330,12 @@ final class FrameLayout: NSObject {
 
     // MARK: - Filling the parent
 
-    @objc @discardableResult
+    @discardableResult
     func fullWidth() -> FrameLayout {
         x(0).toRight(0)
     }
 
-    @objc @discardableResult
+    @discardableResult
     func fullHeight() -> FrameLayout {
         each { target in
             guard let parentBounds = target.parentBounds else {
@@ -350,14 +347,14 @@ final class FrameLayout: NSObject {
         return self
     }
 
-    @objc @discardableResult
+    @discardableResult
     func fullFrame() -> FrameLayout {
         fullWidth().fullHeight()
     }
 
     /// Stretches the width so the right edge sits `value` points from the
     /// parent's right edge; never negative.
-    @objc(toRight:) @discardableResult
+    @discardableResult
     func toRight(_ value: CGFloat) -> FrameLayout {
         let value = Self.checked(value)
         each { target in
@@ -371,7 +368,7 @@ final class FrameLayout: NSObject {
 
     /// Stretches the width so the right edge sits at `value`, never past the
     /// left edge.
-    @objc(toMaxX:) @discardableResult
+    @discardableResult
     func toMaxX(_ value: CGFloat) -> FrameLayout {
         let value = Self.checked(value)
         each { target in
@@ -385,7 +382,7 @@ final class FrameLayout: NSObject {
 
     /// Stretches the height so the bottom edge sits at `value`, never above
     /// the top edge.
-    @objc(toMaxY:) @discardableResult
+    @discardableResult
     func toMaxY(_ value: CGFloat) -> FrameLayout {
         let value = Self.checked(value)
         each { target in
@@ -398,7 +395,7 @@ final class FrameLayout: NSObject {
     }
 
     /// Moves the top edge to `value` keeping the bottom edge in place.
-    @objc(toY:) @discardableResult
+    @discardableResult
     func toY(_ value: CGFloat) -> FrameLayout {
         let value = Self.checked(value)
         each { target in
@@ -413,7 +410,7 @@ final class FrameLayout: NSObject {
 
     /// Stretches the height so the bottom edge sits `value` points from the
     /// parent's bottom edge.
-    @objc(toBottom:) @discardableResult
+    @discardableResult
     func toBottom(_ value: CGFloat) -> FrameLayout {
         let value = Self.checked(value)
         each { target in
@@ -434,7 +431,7 @@ final class FrameLayout: NSObject {
 
     /// Keeps only the visible views and layers: not hidden, attached, and at
     /// least 1% opaque.
-    @objc @discardableResult
+    @discardableResult
     func visibles() -> FrameLayout {
         targets = targets.filter(\.isVisible)
         return self
@@ -443,7 +440,7 @@ final class FrameLayout: NSObject {
     /// Centres the group's union horizontally in the shared parent, moving
     /// every member by the same amount. Does nothing when the members do
     /// not share a parent.
-    @objc @discardableResult
+    @discardableResult
     func groupHorAlign() -> FrameLayout {
         guard let first = targets.first, let parent = first.parent else {
             if !targets.isEmpty {
diff --git a/LookInside/Base/ImageTextView.swift b/LookInside/Base/ImageTextView.swift
index ccc34ce3..68ae4c95 100644
--- a/LookInside/Base/ImageTextView.swift
+++ b/LookInside/Base/ImageTextView.swift
@@ -7,8 +7,8 @@ import AppKit
 
 /// An image followed by a one-line label, centred vertically.
 class ImageTextView: BaseView {
-    @objc let imageView = NSImageView()
-    @objc let label = TextLabel()
+    let imageView = NSImageView()
+    let label = TextLabel()
 
     var imageMargins = HorizontalMargins(left: 0, right: 0)
 
diff --git a/LookInside/Base/Message/MessageAttribute.swift b/LookInside/Base/Message/MessageAttribute.swift
index dfb33383..27b31b2a 100644
--- a/LookInside/Base/Message/MessageAttribute.swift
+++ b/LookInside/Base/Message/MessageAttribute.swift
@@ -77,7 +77,6 @@ class MessageAttribute: NSObject {
         currentValue = value
     }
 
-    @objc(attributeWithValue:)
     class func attribute(withValue value: Any?) -> MessageAttribute {
         MessageAttribute(value: value)
     }
@@ -137,7 +136,6 @@ final class DoubleMessageAttribute: MessageAttribute {
         self.init(value: NSNumber(value: value))
     }
 
-    @objc(attributeWithDouble:)
     class func attribute(withDouble value: Double) -> DoubleMessageAttribute {
         DoubleMessageAttribute(double: value)
     }
@@ -156,7 +154,6 @@ final class IntegerMessageAttribute: MessageAttribute {
         self.init(value: NSNumber(value: value))
     }
 
-    @objc(attributeWithInteger:)
     class func attribute(withInteger value: Int) -> IntegerMessageAttribute {
         IntegerMessageAttribute(integer: value)
     }
@@ -175,7 +172,6 @@ final class BoolMessageAttribute: MessageAttribute {
         self.init(value: NSNumber(value: value))
     }
 
-    @objc(attributeWithBOOL:)
     class func attribute(withBOOL value: Bool) -> BoolMessageAttribute {
         BoolMessageAttribute(bool: value)
     }
diff --git a/LookInside/Base/NumberInputView.swift b/LookInside/Base/NumberInputView.swift
index 113c1faf..5e493129 100644
--- a/LookInside/Base/NumberInputView.swift
+++ b/LookInside/Base/NumberInputView.swift
@@ -11,7 +11,7 @@ extension NumberInputView {
     static let verticalHeight: CGFloat = 38
 }
 
-@objc enum NumberInputViewStyle: UInt {
+enum NumberInputViewStyle: UInt {
     /// The title sits inside the field, on its right.
     case horizontal
     /// The title sits under the field.
@@ -20,14 +20,14 @@ extension NumberInputView {
 
 /// A Dashboard number field with a short title.
 class NumberInputView: BaseView {
-    @objc let textFieldView = TextFieldView()
+    let textFieldView = TextFieldView()
     private let titleLabel = TextLabel()
 
-    @objc var viewStyle: NumberInputViewStyle = .horizontal {
+    var viewStyle: NumberInputViewStyle = .horizontal {
         didSet { applyViewStyle() }
     }
 
-    @objc var title: String? {
+    var title: String? {
         didSet {
             titleLabel.stringValue = title ?? ""
             // The title can be truncated or abbreviated to a single letter,
@@ -116,7 +116,6 @@ class NumberInputView: BaseView {
 
     /// The value `string` parses to for `attrType` (an integer or a floating
     /// point type), or nil when it does not parse.
-    @objc(parsedValueWithString:attrType:)
     static func parsedValue(with string: String, attrType: LookinAttrType) -> Any? {
         switch attrType {
         case .int, .long, .longLong:
diff --git a/LookInside/Base/OutlineRowView.swift b/LookInside/Base/OutlineRowView.swift
index 0f6c2720..b2d89910 100644
--- a/LookInside/Base/OutlineRowView.swift
+++ b/LookInside/Base/OutlineRowView.swift
@@ -11,7 +11,7 @@ import AppKit
 private let indentUnitWidth: CGFloat = 14
 private let disclosureWidth: CGFloat = 16
 
-@objc enum OutlineRowViewStatus: UInt {
+enum OutlineRowViewStatus: UInt {
     case notExpandable
     case expanded
     case collapsed
diff --git a/LookInside/Base/PerformanceReporter.swift b/LookInside/Base/PerformanceReporter.swift
index bf2718ec..6de65006 100644
--- a/LookInside/Base/PerformanceReporter.swift
+++ b/LookInside/Base/PerformanceReporter.swift
@@ -10,20 +10,20 @@ import QuartzCore
 final class PerformanceReporter: NSObject {
     private static let shared = PerformanceReporter()
 
-    @objc static func sharedInstance() -> PerformanceReporter {
+    static func sharedInstance() -> PerformanceReporter {
         shared
     }
 
     private var reloadStartTime: CFTimeInterval = 0
     private var hierarchyFetchedTime: CFTimeInterval = 0
 
-    @objc func willStartReload() {
+    func willStartReload() {
         reloadStartTime = CACurrentMediaTime()
     }
 
-    @objc func didFetchHierarchy() {
+    func didFetchHierarchy() {
         hierarchyFetchedTime = CACurrentMediaTime()
     }
 
-    @objc func didComplete() {}
+    func didComplete() {}
 }
diff --git a/LookInside/Base/PopPanel.swift b/LookInside/Base/PopPanel.swift
index 56698609..6541c509 100644
--- a/LookInside/Base/PopPanel.swift
+++ b/LookInside/Base/PopPanel.swift
@@ -7,7 +7,6 @@ import AppKit
 
 /// A borderless rounded panel for small editors that pop up over a window.
 class PopPanel: NSPanel {
-    @objc(initWithSize:)
     init(size: NSSize) {
         // Without NSWindowStyleMaskNonactivatingPanel, clicking another app
         // while the panel is shown hides every LookInside window.
diff --git a/LookInside/Base/ProgressIndicatorView.swift b/LookInside/Base/ProgressIndicatorView.swift
index 4af63c3d..67301a0c 100644
--- a/LookInside/Base/ProgressIndicatorView.swift
+++ b/LookInside/Base/ProgressIndicatorView.swift
@@ -51,17 +51,15 @@ class ProgressIndicatorView: BaseView {
         return super.animation(forKey: key)
     }
 
-    @objc func resetToZero() {
+    func resetToZero() {
         progress = 0
     }
 
     /// Animates over 0.5 seconds.
-    @objc(animateToProgress:)
     func animate(toProgress progress: CGFloat) {
         animate(toProgress: progress, duration: 0.5)
     }
 
-    @objc(animateToProgress:duration:)
     func animate(toProgress progress: CGFloat, duration: TimeInterval) {
         NSAnimationContext.runAnimationGroup { context in
             context.duration = duration
@@ -71,7 +69,6 @@ class ProgressIndicatorView: BaseView {
 
     /// Fills the bar, calls `completion`, then empties the bar 0.2 seconds
     /// later.
-    @objc(finishWithCompletion:)
     func finish(completion: (() -> Void)?) {
         NSAnimationContext.runAnimationGroup { context in
             context.duration = 0.1
diff --git a/LookInside/Base/SplitView.swift b/LookInside/Base/SplitView.swift
index ef02ea66..ae3f9195 100644
--- a/LookInside/Base/SplitView.swift
+++ b/LookInside/Base/SplitView.swift
@@ -8,7 +8,7 @@ import AppKit
 /// A split view without visible dividers that reports its first layout.
 class SplitView: NSSplitView {
     /// Called once, after the first `layout`.
-    @objc var didFinishFirstLayout: ((SplitView) -> Void)?
+    var didFinishFirstLayout: ((SplitView) -> Void)?
 
     private var hasLaidOut = false
 
diff --git a/LookInside/Base/SwiftDemangler.swift b/LookInside/Base/SwiftDemangler.swift
index 5b7bc5d8..e6fbd076 100644
--- a/LookInside/Base/SwiftDemangler.swift
+++ b/LookInside/Base/SwiftDemangler.swift
@@ -18,7 +18,7 @@ public class SwiftDemangler: NSObject {
     }
 
     /// 这里返回的结果会尽可能地短，去除了很多信息
-    @objc public static func simpleParse(input: String) -> String {
+    public static func simpleParse(input: String) -> String {
         if let cachedResult = simpleCache[input] {
             return cachedResult
         }
@@ -28,7 +28,7 @@ public class SwiftDemangler: NSObject {
     }
 
     /// 这里返回的结果会尽可能地长、包含了 module name 等各种信息
-    @objc public static func completedParse(input: String) -> String {
+    public static func completedParse(input: String) -> String {
         if let cachedResult = completedCache[input] {
             return cachedResult
         }
diff --git a/LookInside/Base/TableView.swift b/LookInside/Base/TableView.swift
index 1925c66f..a1a84295 100644
--- a/LookInside/Base/TableView.swift
+++ b/LookInside/Base/TableView.swift
@@ -36,10 +36,10 @@ protocol TableViewDelegate: NSTableViewDelegate {
 protocol TableViewDataSource: NSTableViewDataSource {}
 
 class TableView: NSScrollView {
-    @objc let tableView: NSTableView
+    let tableView: NSTableView
 
     /// Defaults to true.
-    @objc var canScrollHorizontally: Bool = true {
+    var canScrollHorizontally: Bool = true {
         didSet {
             hasHorizontalScroller = canScrollHorizontally
             if !canScrollHorizontally {
@@ -48,13 +48,13 @@ class TableView: NSScrollView {
         }
     }
 
-    @objc weak var delegate: TableViewDelegate?
-    @objc weak var dataSource: TableViewDataSource?
+    weak var delegate: TableViewDelegate?
+    weak var dataSource: TableViewDataSource?
 
     /// Defaults to true.
-    @objc var adjustsSelectionAutomatically: Bool = true
+    var adjustsSelectionAutomatically: Bool = true
     /// Defaults to true.
-    @objc var adjustsHoverAutomatically: Bool = true
+    var adjustsHoverAutomatically: Bool = true
 
     private var horizontalScrollWidthManager: TableViewHorizontalScrollWidthManager?
 
@@ -71,7 +71,7 @@ class TableView: NSScrollView {
     /// -1 when no row is selected.
     private var selectedRow: Int = -1
 
-    @objc override init(frame frameRect: NSRect) {
+    override init(frame frameRect: NSRect) {
         let tableView = KeyForwardingTableView()
         self.tableView = tableView
         super.init(frame: frameRect)
@@ -121,7 +121,7 @@ class TableView: NSScrollView {
         }
     }
 
-    @objc func reloadData() {
+    func reloadData() {
         setSelectedRow(-1)
 
         horizontalScrollWidthManager = nil
@@ -137,7 +137,7 @@ class TableView: NSScrollView {
     }
 
     /// Reloads but keeps the scroll position; `reloadData()` resets it.
-    @objc func reloadDataWithOffset() {
+    func reloadDataWithOffset() {
         let offset = documentVisibleRect.origin
         reloadData()
         needsLayout = true
@@ -145,7 +145,6 @@ class TableView: NSScrollView {
         documentView?.scroll(offset)
     }
 
-    @objc(scrollRowToVisible:)
     func scrollRowToVisible(_ row: Int) {
         tableView.scrollRowToVisible(row)
     }
diff --git a/LookInside/Base/TableViewHorizontalScrollWidthManager.swift b/LookInside/Base/TableViewHorizontalScrollWidthManager.swift
index fa6ddcb4..36e37415 100644
--- a/LookInside/Base/TableViewHorizontalScrollWidthManager.swift
+++ b/LookInside/Base/TableViewHorizontalScrollWidthManager.swift
@@ -9,11 +9,10 @@
 import Foundation
 
 class TableViewHorizontalScrollWidthManager: NSObject {
-    @objc var maxRowWidth: CGFloat = 0
+    var maxRowWidth: CGFloat = 0
 
-    @objc var didReachNewMaxWidth: (() -> Void)?
+    var didReachNewMaxWidth: (() -> Void)?
 
-    @objc(rowDidLayoutWithWidth:)
     func rowDidLayout(withWidth width: CGFloat) {
         guard width > maxRowWidth else {
             return
diff --git a/LookInside/Base/TextControl.swift b/LookInside/Base/TextControl.swift
index 76bd8422..29300074 100644
--- a/LookInside/Base/TextControl.swift
+++ b/LookInside/Base/TextControl.swift
@@ -9,15 +9,15 @@
 import AppKit
 
 class TextControl: BaseControl {
-    @objc let label = TextLabel()
+    let label = TextLabel()
 
-    @objc var insets = NSEdgeInsets() {
+    var insets = NSEdgeInsets() {
         didSet {
             needsLayout = true
         }
     }
 
-    @objc var rightImage: NSImage? {
+    var rightImage: NSImage? {
         didSet {
             if let rightImage {
                 if rightImageView == nil {
@@ -33,13 +33,13 @@ class TextControl: BaseControl {
         }
     }
 
-    @objc var spaceBetweenLabelAndImage: CGFloat = 0 {
+    var spaceBetweenLabelAndImage: CGFloat = 0 {
         didSet {
             needsLayout = true
         }
     }
 
-    @objc var rightImageOffsetY: CGFloat = 0 {
+    var rightImageOffsetY: CGFloat = 0 {
         didSet {
             needsLayout = true
         }
diff --git a/LookInside/Base/TextFieldView.swift b/LookInside/Base/TextFieldView.swift
index e41599a8..a819d008 100644
--- a/LookInside/Base/TextFieldView.swift
+++ b/LookInside/Base/TextFieldView.swift
@@ -8,29 +8,29 @@ import AppKit
 /// A text field with insets, an optional leading image and an optional
 /// trailing button that clears a search.
 class TextFieldView: BaseView {
-    @objc let textField = NSTextField()
+    let textField = NSTextField()
 
-    @objc var insets = NSEdgeInsetsZero {
+    var insets = NSEdgeInsetsZero {
         didSet { needsLayout = true }
     }
 
-    @objc var textColors: TwoColors? {
+    var textColors: TwoColors? {
         didSet { updateColors() }
     }
 
-    @objc var image: NSImage? {
+    var image: NSImage? {
         didSet { updateImageView() }
     }
 
     /// Set by `initCloseButton()`.
-    @objc private(set) var closeButton: NSButton?
+    private(set) var closeButton: NSButton?
 
     private var imageView: NSImageView?
     private var textDidChangeObserver: NSObjectProtocol?
     private var stringValueObservation: NSKeyValueObservation?
 
     /// A read-only, borderless label.
-    @objc(labelView) static func label() -> TextFieldView {
+    static func label() -> TextFieldView {
         let view = TextFieldView()
         view.textField.wantsLayer = true
         view.textField.backgroundColor = .clear
@@ -117,7 +117,7 @@ class TextFieldView: BaseView {
 
     /// Adds the trailing "cancel search" button, shown while the field has
     /// text.
-    @objc func initCloseButton() {
+    func initCloseButton() {
         guard closeButton == nil else { return }
         let closeButton = NSButton()
         closeButton.title = NSLocalizedString("CancelSearch", comment: "")
diff --git a/LookInside/Base/TextLabel.swift b/LookInside/Base/TextLabel.swift
index e8f62c68..959d4a22 100644
--- a/LookInside/Base/TextLabel.swift
+++ b/LookInside/Base/TextLabel.swift
@@ -10,14 +10,14 @@ import AppKit
 
 class TextLabel: NSTextField {
     /// 默认为 nil
-    @objc var textColors: TwoColors? {
+    var textColors: TwoColors? {
         didSet {
             updateColors()
         }
     }
 
     /// 默认为 nil
-    @objc var backgroundColors: TwoColors? {
+    var backgroundColors: TwoColors? {
         didSet {
             updateColors()
         }
diff --git a/LookInside/Base/TextsMenuView.swift b/LookInside/Base/TextsMenuView.swift
index f15dc3bc..f38d2fbf 100644
--- a/LookInside/Base/TextsMenuView.swift
+++ b/LookInside/Base/TextsMenuView.swift
@@ -5,7 +5,7 @@
 
 import AppKit
 
-@objc enum TextsMenuViewType: Int {
+enum TextsMenuViewType: Int {
     /// Left column left-aligned, right column right-aligned.
     case justified
     /// Both columns meet in the middle.
@@ -16,22 +16,22 @@ import AppKit
 /// value.
 class TextsMenuView: BaseView {
     /// Defaults to {0, 3, 0, 5}.
-    @objc var insets = NSEdgeInsets(top: 0, left: 3, bottom: 0, right: 5)
+    var insets = NSEdgeInsets(top: 0, left: 3, bottom: 0, right: 5)
 
-    @objc var type: TextsMenuViewType = .justified {
+    var type: TextsMenuViewType = .justified {
         didSet { updateAlignments() }
     }
 
-    @objc var texts: [StringTwoTuple] = [] {
+    var texts: [StringTwoTuple] = [] {
         didSet { reloadLabels() }
     }
 
-    @objc var font: NSFont?
+    var font: NSFont?
 
     /// Defaults to 2.
-    @objc var verSpace: CGFloat = 2
+    var verSpace: CGFloat = 2
     /// Defaults to 10.
-    @objc var horSpace: CGFloat = 10
+    var horSpace: CGFloat = 10
 
     private var leftLabels: [TextLabel] = []
     private var rightLabels: [TextLabel] = []
@@ -163,7 +163,6 @@ class TextsMenuView: BaseView {
 
     /// Puts `button` after the value on row `idx`; the caller handles its
     /// action.
-    @objc(addButton:atIndex:)
     func add(_ button: NSButton, at idx: UInt) {
         let idx = Int(idx)
         guard buttons[idx] == nil else {
diff --git a/LookInside/Base/TipsView.swift b/LookInside/Base/TipsView.swift
index b2cd5bb7..7801e4f7 100644
--- a/LookInside/Base/TipsView.swift
+++ b/LookInside/Base/TipsView.swift
@@ -8,34 +8,34 @@ import AppKit
 /// A pill-shaped notice: optional image, a title, and an optional button
 /// after a separator.
 class TipsView: BaseView {
-    @objc weak var bindingObject: AnyObject?
+    weak var bindingObject: AnyObject?
 
-    @objc var title: String? {
+    var title: String? {
         didSet { titleLabel.stringValue = title ?? "" }
     }
 
     /// Set `buttonText` or `buttonImage` rather than editing the button.
-    @objc let button = NSButton()
+    let button = NSButton()
 
     /// Only one of `buttonText` and `buttonImage` takes effect; set one.
-    @objc var buttonText: String? {
+    var buttonText: String? {
         didSet { updateButton() }
     }
 
-    @objc var buttonImage: NSImage? {
+    var buttonImage: NSImage? {
         didSet { updateButton() }
     }
 
-    @objc var image: NSImage? {
+    var image: NSImage? {
         didSet {
             imageView.image = image
             imageView.isHidden = image == nil
         }
     }
 
-    @objc weak var target: AnyObject?
-    @objc var clickAction: Selector?
-    @objc var didClick: ((TipsView) -> Void)?
+    weak var target: AnyObject?
+    var clickAction: Selector?
+    var didClick: ((TipsView) -> Void)?
 
     let titleLabel = TextLabel()
     private let imageView = NSImageView()
@@ -134,7 +134,6 @@ class TipsView: BaseView {
         updateButton()
     }
 
-    @objc(setImageByDeviceType:)
     func setImage(byDeviceType type: LookinAppInfoDevice) {
         switch type {
         case .mac, .macCatalyst:
@@ -154,7 +153,6 @@ class TipsView: BaseView {
 
     /// Prefers the icon of the hardware model the app runs on, falling back
     /// to the device family's icon when the Server reports no model.
-    @objc(setImageByAppInfo:)
     func setImage(byAppInfo appInfo: InspectedAppInfo?) {
         if let deviceIcon = DeviceIconProvider.deviceIcon(forAppInfo: appInfo, pointSize: DeviceIconProvider.tipsPointSize) {
             image = deviceIcon
@@ -167,7 +165,6 @@ class TipsView: BaseView {
         setImage(byDeviceType: appInfo?.deviceType ?? .simulator)
     }
 
-    @objc(setInternalInsetsRight:)
     func setInternalInsetsRight(_ value: CGFloat) {
         insetRightWithButton = value
         insetRightWithoutButton = value
@@ -211,7 +208,7 @@ class TipsView: BaseView {
 class YellowTipsView: TipsView {
     private var isAnimating = false
 
-    @objc func startAnimation() {
+    func startAnimation() {
         guard !isAnimating else { return }
         let animation = CABasicAnimation(keyPath: "backgroundColor")
         if effectiveAppearance.isDarkMode {
@@ -229,7 +226,7 @@ class YellowTipsView: TipsView {
         isAnimating = true
     }
 
-    @objc func endAnimation() {
+    func endAnimation() {
         layer?.removeAllAnimations()
         isAnimating = false
     }
@@ -248,7 +245,7 @@ class YellowTipsView: TipsView {
 
 /// A red notice that pulses, used for connection loss.
 class RedTipsView: TipsView {
-    @objc func startAnimation() {
+    func startAnimation() {
         let animation = CABasicAnimation(keyPath: "backgroundColor")
         animation.fromValue = NSColor.rgb255(208, 2, 27, 0.9).cgColor
         animation.toValue = NSColor.rgb255(208, 2, 27, 0.7).cgColor
@@ -259,7 +256,7 @@ class RedTipsView: TipsView {
         layer?.add(animation, forKey: nil)
     }
 
-    @objc func endAnimation() {
+    func endAnimation() {
         layer?.removeAllAnimations()
     }
 
diff --git a/LookInside/Base/TwoColors.swift b/LookInside/Base/TwoColors.swift
index a74af635..dcb580cc 100644
--- a/LookInside/Base/TwoColors.swift
+++ b/LookInside/Base/TwoColors.swift
@@ -7,10 +7,9 @@ import AppKit
 
 /// A colour pair resolved against the app's current appearance.
 final class TwoColors: NSObject {
-    @objc var colorInLightMode: NSColor?
-    @objc var colorInDarkMode: NSColor?
+    var colorInLightMode: NSColor?
+    var colorInDarkMode: NSColor?
 
-    @objc(colorsWithColorInLightMode:colorInDarkMode:)
     static func colors(inLightMode colorInLightMode: NSColor?, inDarkMode colorInDarkMode: NSColor?) -> TwoColors {
         let colors = TwoColors()
         colors.colorInLightMode = colorInLightMode
@@ -28,7 +27,7 @@ final class TwoColors: NSObject {
 
     /// The dark colour while the app's effective appearance is dark, the
     /// light one otherwise.
-    @objc var color: NSColor? {
+    var color: NSColor? {
         let isDarkMode = NSApp?.effectiveAppearance.isDarkMode ?? false
         return isDarkMode ? colorInDarkMode : colorInLightMode
     }
diff --git a/LookInside/Connection/AppsManager.swift b/LookInside/Connection/AppsManager.swift
index 9d822937..9e2e1843 100644
--- a/LookInside/Connection/AppsManager.swift
+++ b/LookInside/Connection/AppsManager.swift
@@ -16,7 +16,6 @@ import FoundationToolbox
 @Loggable(subsystem: "com.lookinside.app")
 @MainActor
 final class AppsManager: NSObject {
-    @objc(sharedInstance)
     static let shared = AppsManager()
 
     override private init() {
diff --git a/LookInside/Connection/ConnectionManager.swift b/LookInside/Connection/ConnectionManager.swift
index 3e4fecd3..4dfca6ee 100644
--- a/LookInside/Connection/ConnectionManager.swift
+++ b/LookInside/Connection/ConnectionManager.swift
@@ -70,7 +70,6 @@ private final class ConnectionPort {
 @Loggable(.internal, subsystem: "com.lookinside.app")
 @MainActor
 final class ConnectionManager: NSObject {
-    @objc(sharedInstance)
     static let shared = ConnectionManager()
 
     private let simulatorPorts: [ConnectionPort]
diff --git a/LookInside/Connection/InspectableApp.swift b/LookInside/Connection/InspectableApp.swift
index 175fd7b0..b3db658d 100644
--- a/LookInside/Connection/InspectableApp.swift
+++ b/LookInside/Connection/InspectableApp.swift
@@ -22,11 +22,11 @@ enum AppResponseEvent {
 final class InspectableApp: NSObject {
     /// Set when the app's Server is too old or too new for this Host, or
     /// answered the app info request with another error.
-    @objc dynamic var serverVersionError: NSError?
+    var serverVersionError: NSError?
 
-    @objc dynamic var appInfo: InspectedAppInfo?
+    var appInfo: InspectedAppInfo?
 
-    @objc dynamic weak var channel: ServerChannel?
+    weak var channel: ServerChannel?
 
     // MARK: - Requests
 
@@ -215,7 +215,6 @@ extension InspectableApp {
 
     /// Stops the running hierarchy details request: it completes, and the
     /// Server is told to stop sending.
-    @objc
     @MainActor
     func cancelHierarchyDetailFetching() {
         cancelRequest(type: UInt32(LookinRequestTypeHierarchyDetails))
diff --git a/LookInside/Connection/LiveDocument.swift b/LookInside/Connection/LiveDocument.swift
index 00333da1..4196d41c 100644
--- a/LookInside/Connection/LiveDocument.swift
+++ b/LookInside/Connection/LiveDocument.swift
@@ -54,7 +54,6 @@ final class LiveDocument: NSDocument {
     }
 
     /// The live document whose window is `window`, or nil.
-    @objc(documentInWindow:)
     static func document(in window: NSWindow?) -> LiveDocument? {
         guard let window else { return nil }
         return NSDocumentController.shared.document(for: window) as? LiveDocument
@@ -66,12 +65,12 @@ final class LiveDocument: NSDocument {
     }
 
     /// Nil before `makeWindowControllers()` ran.
-    @objc var hierarchyDataSource: StaticHierarchyDataSource? {
+    var hierarchyDataSource: StaticHierarchyDataSource? {
         staticWindowController?.hierarchyDataSource
     }
 
     /// Nil before `makeWindowControllers()` ran.
-    @objc var asyncUpdateManager: StaticAsyncUpdateManager? {
+    var asyncUpdateManager: StaticAsyncUpdateManager? {
         staticWindowController?.asyncUpdateManager
     }
 
diff --git a/LookInside/Connection/LiveDocumentController.swift b/LookInside/Connection/LiveDocumentController.swift
index 312f569e..bb47b92b 100644
--- a/LookInside/Connection/LiveDocumentController.swift
+++ b/LookInside/Connection/LiveDocumentController.swift
@@ -13,7 +13,6 @@ import AppKit
 
 @MainActor
 final class LiveDocumentController: NSObject {
-    @objc(sharedInstance)
     static let shared = LiveDocumentController()
 
     override private init() {
@@ -39,24 +38,7 @@ final class LiveDocumentController: NSObject {
         return (document, false)
     }
 
-    /// Objective-C form of `openLiveDocument(for:)`. `completion` runs on
-    /// the main thread before this returns; with a nil app it gets
-    /// `LookinErr_Inner` and no document.
-    @objc(openLiveDocumentForInspectableApp:completion:)
-    func openLiveDocument(
-        for app: InspectableApp?,
-        completion: ((LiveDocument?, Bool, NSError?) -> Void)?
-    ) {
-        guard let app else {
-            completion?(nil, false, ConnectionError.inner)
-            return
-        }
-        let (document, alreadyOpen) = openLiveDocument(for: app)
-        completion?(document, alreadyOpen, nil)
-    }
-
     /// The live document whose app uses `channel`, or nil.
-    @objc(liveDocumentForChannel:)
     func liveDocument(for channel: ServerChannel?) -> LiveDocument? {
         guard let channel else { return nil }
         return NSDocumentController.shared.documents
diff --git a/LookInside/Console/ConsoleViewController.swift b/LookInside/Console/ConsoleViewController.swift
index 55983a7b..2f3d0e63 100644
--- a/LookInside/Console/ConsoleViewController.swift
+++ b/LookInside/Console/ConsoleViewController.swift
@@ -20,18 +20,17 @@ final class ConsoleViewController: BaseViewController, TableViewDelegate, TableV
     private lazy var measuringReturnRowView = ConsoleReturnRowView()
     private var previousWidth: CGFloat = 0
 
-    @objc weak var liveDocument: LiveDocument? {
+    weak var liveDocument: LiveDocument? {
         didSet { dataSource.liveDocument = liveDocument }
     }
 
     /// Whether the Console is on screen; while it is, the highlighted
     /// hierarchy item can become the call target.
-    @objc var isControllerShowing: Bool {
+    var isControllerShowing: Bool {
         get { dataSource.isShowingConsole }
         set { dataSource.isShowingConsole = newValue }
     }
 
-    @objc(initWithHierarchyDataSource:)
     init(hierarchyDataSource: HierarchyDataSource) {
         dataSource = ConsoleDataSource(hierarchyDataSource: hierarchyDataSource)
         inputRowView = ConsoleInputRowView(dataSource: dataSource)
@@ -120,7 +119,6 @@ final class ConsoleViewController: BaseViewController, TableViewDelegate, TableV
     }
 
     /// Calls `text` on `obj` and adds the call to the transcript; errors are only logged.
-    @objc(submitWithObj:text:)
     func submit(with obj: InspectedObject?, text: String) {
         Task {
             do {
diff --git a/LookInside/DanceScript/DanceScriptManager.swift b/LookInside/DanceScript/DanceScriptManager.swift
index c4aaa2c3..86e3fe9d 100644
--- a/LookInside/DanceScript/DanceScriptManager.swift
+++ b/LookInside/DanceScript/DanceScriptManager.swift
@@ -13,11 +13,10 @@ import AppKit
 import FoundationToolbox
 
 @Loggable(subsystem: "com.lookinside.app")
-@objc(DanceScriptManager)
 final class DanceScriptManager: NSObject {
     private static let sharedManager = DanceScriptManager()
 
-    @objc class func shared() -> DanceScriptManager {
+    class func shared() -> DanceScriptManager {
         sharedManager
     }
 
@@ -49,7 +48,6 @@ final class DanceScriptManager: NSObject {
     }
 
     @MainActor
-    @objc(handleText:)
     func handleText(_ json: String?) {
         guard let json else {
             PeripheralAlerts.show(ConnectionError.inner, in: PeripheralAlerts.keyWindow)
diff --git a/LookInside/Dashboard/AttributeView/DashboardAttributeNumberInputView.swift b/LookInside/Dashboard/AttributeView/DashboardAttributeNumberInputView.swift
index 1fd85015..616df946 100644
--- a/LookInside/Dashboard/AttributeView/DashboardAttributeNumberInputView.swift
+++ b/LookInside/Dashboard/AttributeView/DashboardAttributeNumberInputView.swift
@@ -12,7 +12,7 @@ import FoundationToolbox
 /// A single number: opacity, corner radius, font size and the like.
 @Loggable(subsystem: "com.lookinside.app")
 final class DashboardAttributeNumberInputView: DashboardAttributeView, NSTextFieldDelegate {
-    @objc let inputView = NumberInputView()
+    let inputView = NumberInputView()
 
     /// Laid out horizontally (title inside the field) with three decimals;
     /// everything else is vertical (title below) with two.
diff --git a/LookInside/Dashboard/AttributeView/DashboardAttributeView.swift b/LookInside/Dashboard/AttributeView/DashboardAttributeView.swift
index 1eedfdfa..9d31a0aa 100644
--- a/LookInside/Dashboard/AttributeView/DashboardAttributeView.swift
+++ b/LookInside/Dashboard/AttributeView/DashboardAttributeView.swift
@@ -15,11 +15,11 @@ import FoundationToolbox
 @Loggable(subsystem: "com.lookinside.app")
 class DashboardAttributeView: BaseView {
     /// Setting the attribute renders it.
-    @objc var attribute: InspectedAttribute? {
+    var attribute: InspectedAttribute? {
         didSet { renderWithAttribute() }
     }
 
-    @objc weak var dashboardViewController: DashboardViewController? {
+    weak var dashboardViewController: DashboardViewController? {
         didSet { dashboardViewControllerDidChange() }
     }
 
@@ -35,7 +35,7 @@ class DashboardAttributeView: BaseView {
     /// Whether the user can change the value: a user-custom attribute with
     /// a setter, or a known attribute with a setter on a live (not read
     /// from file) dashboard.
-    @objc func canEdit() -> Bool {
+    func canEdit() -> Bool {
         guard let attribute else { return false }
         if attribute.isUserCustom() {
             return !(attribute.customSetterID ?? "").isEmpty
@@ -45,11 +45,11 @@ class DashboardAttributeView: BaseView {
     }
 
     /// Reads `attribute` and renders it.
-    @objc func renderWithAttribute() {}
+    func renderWithAttribute() {}
 
     /// How many of this view fit in a row: 1 takes the whole row, 0 sizes
     /// the view to its content.
-    @objc func numberOfColumnsOccupied() -> Int {
+    func numberOfColumnsOccupied() -> Int {
         1
     }
 
@@ -92,10 +92,9 @@ class DashboardAttributeView: BaseView {
 /// fields ignore that second end-of-editing so the value is not submitted
 /// twice.
 final class DashboardTextControlEditingFlag: NSObject {
-    @objc(sharedInstance)
     static let shared = DashboardTextControlEditingFlag()
 
-    @objc var shouldIgnoreTextEditingChangeEvent = false
+    var shouldIgnoreTextEditingChangeEvent = false
 
     override private init() {
         super.init()
diff --git a/LookInside/Dashboard/AttributeView/JSON/JSONAttributeViews.swift b/LookInside/Dashboard/AttributeView/JSON/JSONAttributeViews.swift
index 71efe329..e3c07e42 100644
--- a/LookInside/Dashboard/AttributeView/JSON/JSONAttributeViews.swift
+++ b/LookInside/Dashboard/AttributeView/JSON/JSONAttributeViews.swift
@@ -226,7 +226,6 @@ final class JSONAttributeViewController: BaseViewController, TableViewDelegate,
         tableView.dashboardLayout.fullFrame().toY(28)
     }
 
-    @objc(renderWithJSON:)
     func render(json: String?) {
         tree.render(json: json)
         tableView.reloadData()
@@ -273,7 +272,7 @@ final class JSONAttributeViewController: BaseViewController, TableViewDelegate,
 
 /// The window of `JSONAttributeViewController`.
 final class JSONAttributeWindowController: WindowController {
-    @objc convenience init() {
+    convenience init() {
         let window = AppWindow(
             contentRect: NSRect(x: 0, y: 0, width: 600, height: 320),
             styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
diff --git a/LookInside/Dashboard/DashboardViewController.swift b/LookInside/Dashboard/DashboardViewController.swift
index d245d374..96c37e1c 100644
--- a/LookInside/Dashboard/DashboardViewController.swift
+++ b/LookInside/Dashboard/DashboardViewController.swift
@@ -15,8 +15,8 @@ import FoundationToolbox
 /// document read from a file is read-only.
 @Loggable(subsystem: "com.lookinside.app")
 final class DashboardViewController: BaseViewController, DashboardCardViewDelegate, DashboardHeaderViewDelegate, DashboardSearchPropertyViewDelegate, DashboardSearchMethodsViewDelegate {
-    /// Read by key by the DEBUG UI snapshots.
-    @objc let scrollView = NSScrollView()
+    /// Read by the DEBUG UI snapshots.
+    let scrollView = NSScrollView()
     private let documentView = BaseView()
     private let cardContainerView = BaseView()
     private let searchContainerView = BaseView()
@@ -39,20 +39,19 @@ final class DashboardViewController: BaseViewController, DashboardCardViewDelega
 
     /// Whether this dashboard shows a live document (rather than one read
     /// from a file).
-    @objc let isStaticMode: Bool
+    let isStaticMode: Bool
 
     /// The update manager of the owning inspector, which patches the
     /// preview after modifications that need it.
-    @objc weak var asyncUpdateManager: StaticAsyncUpdateManager?
+    weak var asyncUpdateManager: StaticAsyncUpdateManager?
 
     /// The live document that owns this dashboard; its inspectable app
     /// receives attribute modifications and method invocations. Nil on a
     /// document read from a file.
-    @objc weak var liveDocument: LiveDocument? {
+    weak var liveDocument: LiveDocument? {
         didSet { methodsDataSource?.liveDocument = liveDocument }
     }
 
-    @objc(initWithStaticDataSource:)
     init(staticDataSource dataSource: StaticHierarchyDataSource) {
         staticDataSource = dataSource
         readDataSource = nil
@@ -61,7 +60,6 @@ final class DashboardViewController: BaseViewController, DashboardCardViewDelega
         didInitialize()
     }
 
-    @objc(initWithReadDataSource:)
     init(readDataSource dataSource: ReadHierarchyDataSource) {
         staticDataSource = nil
         readDataSource = dataSource
@@ -229,11 +227,11 @@ final class DashboardViewController: BaseViewController, DashboardCardViewDelega
         view.needsLayout = true
     }
 
-    @objc func reloadCurrentDisplayItem() {
+    func reloadCurrentDisplayItem() {
         reload(groupList: groupList(for: currentDataSource()?.selectedItem))
     }
 
-    @objc func currentDataSource() -> HierarchyDataSource? {
+    func currentDataSource() -> HierarchyDataSource? {
         if let staticDataSource {
             return staticDataSource
         }
@@ -317,7 +315,7 @@ final class DashboardViewController: BaseViewController, DashboardCardViewDelega
         DashboardTextControlEditingFlag.shared.shouldIgnoreTextEditingChangeEvent = false
 
         if DashboardBlueprint.needPatchAfterModification(withAttrID: attribute.identifier), let modifyingItem {
-            _ = asyncUpdateManager?.perform(Selector(("updateAfterModifyingDisplayItem:")), with: modifyingItem)
+            asyncUpdateManager?.updateAfterModifyingDisplayItem(modifyingItem)
         }
     }
 
diff --git a/LookInside/Dashboard/EnumListRegistry.swift b/LookInside/Dashboard/EnumListRegistry.swift
index 78e138e1..8c89219d 100644
--- a/LookInside/Dashboard/EnumListRegistry.swift
+++ b/LookInside/Dashboard/EnumListRegistry.swift
@@ -15,9 +15,9 @@ import Foundation
 /// One case of an enum: its name, raw value, and the first OS major
 /// version that has it (0 for every version).
 final class EnumListRegistryKeyValueItem: NSObject {
-    @objc let desc: String
-    @objc let value: Int
-    @objc let availableOSVersion: Int
+    let desc: String
+    let value: Int
+    let availableOSVersion: Int
 
     init(desc: String, value: Int, availableOSVersion: Int) {
         self.desc = desc
@@ -27,7 +27,6 @@ final class EnumListRegistryKeyValueItem: NSObject {
 }
 
 final class EnumListRegistry: NSObject {
-    @objc(sharedInstance)
     static let shared = EnumListRegistry()
 
     private let data: [String: [EnumListRegistryKeyValueItem]]
@@ -38,14 +37,12 @@ final class EnumListRegistry: NSObject {
     }
 
     /// The cases of `enumName` in menu order, or nil for an unknown list.
-    @objc(itemsForEnumName:)
     func items(forEnumName enumName: String?) -> [EnumListRegistryKeyValueItem]? {
         guard let enumName else { return nil }
         return data[enumName]
     }
 
     /// The name of the first case of `enumName` whose value is `value`.
-    @objc(descForEnumName:value:)
     func desc(forEnumName enumName: String?, value: Int) -> String? {
         guard let items = items(forEnumName: enumName) else {
             assertionFailure("unknown enum list \(enumName ?? "nil")")
diff --git a/LookInside/DebugE2E/DebugE2EDumpWriter.swift b/LookInside/DebugE2E/DebugE2EDumpWriter.swift
index 2178a70a..26ea71b2 100644
--- a/LookInside/DebugE2E/DebugE2EDumpWriter.swift
+++ b/LookInside/DebugE2E/DebugE2EDumpWriter.swift
@@ -14,7 +14,6 @@
     /// node's `host` record names their pixel sizes; the pixels themselves are
     /// covered by lookin-probe.
     final class DebugE2EDumpWriter: NSObject {
-        @objc(writeSnapshotForDataSource:app:platform:toDirectory:error:)
         static func writeSnapshot(
             for dataSource: StaticHierarchyDataSource,
             app: InspectableApp,
@@ -130,7 +129,6 @@
         /// `AppsManager.scanApps(needImages: true, localInfos: nil)`:
         /// nil when no channel is connected. `completion` runs on the main
         /// thread, after this method returns.
-        @objc(fetchAppsWithCompletion:)
         @MainActor
         static func fetchApps(completion: @escaping ([InspectableApp]?) -> Void) {
             Task { @MainActor in
@@ -141,7 +139,6 @@
 
         /// `app`'s hierarchy, or the error the request failed with.
         /// `completion` runs on the main thread, after this method returns.
-        @objc(fetchHierarchyForApp:completion:)
         @MainActor
         static func fetchHierarchy(for app: InspectableApp, completion: @escaping (HierarchyInfo?, Error?) -> Void) {
             Task { @MainActor in
@@ -155,7 +152,6 @@
 
         /// Whether the 220/221 license handshake succeeded on `app`'s channel,
         /// as the Host's connection layer records it.
-        @objc(isChannelLicensedForApp:)
         static func isChannelLicensed(for app: InspectableApp) -> Bool {
             MainActor.assumeIsolated {
                 app.channel?.connectionState.licenseHandshake.isVerified ?? false
diff --git a/LookInside/DebugE2E/DebugUISnapshots.swift b/LookInside/DebugE2E/DebugUISnapshots.swift
index bf206868..d9fd0698 100644
--- a/LookInside/DebugE2E/DebugUISnapshots.swift
+++ b/LookInside/DebugE2E/DebugUISnapshots.swift
@@ -72,7 +72,7 @@
             self.directory = directory
         }
 
-        @objc static var isEnabled: Bool {
+        static var isEnabled: Bool {
             !(ProcessInfo.processInfo.environment[directoryVariable] ?? "").isEmpty
         }
 
@@ -92,7 +92,7 @@
 
         /// Step 1: captures the launch window before any app is inspectable,
         /// then writes the marker. Called once the app finished launching.
-        @objc static func captureLaunchScene() {
+        static func captureLaunchScene() {
             guard let snapshots = instance() else { return }
             Task { @MainActor in
                 do {
@@ -109,7 +109,6 @@
 
         /// Steps 2 and 3: runs every scene against the loaded live document,
         /// then calls `completion` with the exit status.
-        @objc(runScenesForDocument:completion:)
         static func runScenes(for document: LiveDocument, completion: @escaping (Int32) -> Void) {
             guard let snapshots = instance() else {
                 completion(0)
@@ -314,18 +313,15 @@
         /// Types into the hierarchy's filter field as the user would; nil
         /// ends the filter through its close button path.
         private func filterHierarchy(_ viewController: StaticViewController, text: String?) async throws {
-            guard let hierarchyView = viewController.currentHierarchyView(),
-                  let field = hierarchyView.value(forKey: "searchTextFieldView") as? TextFieldView
-            else { throw SnapshotError("the hierarchy view has no filter field") }
-            field.textField.stringValue = text ?? ""
+            guard let hierarchyView = viewController.currentHierarchyView()
+            else { throw SnapshotError("the inspector has no hierarchy view") }
+            hierarchyView.searchTextFieldView.textField.stringValue = text ?? ""
             hierarchyView.delegate?.hierarchyView(hierarchyView, didInputSearch: text)
         }
 
         private func dashboardContentView(of viewController: StaticViewController) throws -> NSView {
-            guard let dashboard = viewController.value(forKey: "dashboardController") as? NSViewController,
-                  let scrollView = dashboard.value(forKey: "scrollView") as? NSScrollView,
-                  let content = scrollView.documentView
-            else { throw SnapshotError("the dashboard has no scroll view") }
+            guard let content = viewController.dashboardController.scrollView.documentView
+            else { throw SnapshotError("the dashboard's scroll view has no document view") }
             return content
         }
 
diff --git a/LookInside/DebugE2E/DebugWindowImage.swift b/LookInside/DebugE2E/DebugWindowImage.swift
index 0429bb74..49cc69e2 100644
--- a/LookInside/DebugE2E/DebugWindowImage.swift
+++ b/LookInside/DebugE2E/DebugWindowImage.swift
@@ -13,7 +13,6 @@
     /// toolbar).
     final class DebugWindowImage: NSObject {
         /// PNG of `window`'s frame view: title bar and toolbar included.
-        @objc(pngDataOfWindow:)
         static func pngData(of window: NSWindow?) -> Data? {
             guard let window, let frameView = window.contentView?.superview ?? window.contentView else {
                 return nil
diff --git a/LookInside/Export/ExportAccessoryView.swift b/LookInside/Export/ExportAccessoryView.swift
index 08424671..00d9697a 100644
--- a/LookInside/Export/ExportAccessoryView.swift
+++ b/LookInside/Export/ExportAccessoryView.swift
@@ -16,7 +16,7 @@ final class ExportAccessoryView: BaseView {
     private static let sizeLabelTop: CGFloat = 5
 
     /// The exported size in bytes, shown in megabytes.
-    @objc var dataSize: UInt = 0 {
+    var dataSize: UInt = 0 {
         didSet {
             sizeLabel.stringValue = String(format: NSLocalizedString("File Size: %.2f M", comment: ""),
                                            ExportNaming.megabytes(dataSize))
diff --git a/LookInside/Export/ExportManager.swift b/LookInside/Export/ExportManager.swift
index cba4cd69..9ac13a10 100644
--- a/LookInside/Export/ExportManager.swift
+++ b/LookInside/Export/ExportManager.swift
@@ -14,14 +14,13 @@ import UniformTypeIdentifiers
 final class ExportManager: NSObject {
     private static let shared = ExportManager()
 
-    @objc class func sharedInstance() -> ExportManager {
+    class func sharedInstance() -> ExportManager {
         shared
     }
 
     /// The archive data of `info`, with every screenshot scaled by
     /// `compression` (clamped to 0.01...1). When `fileName` is given it
     /// receives the suggested file name.
-    @objc(dataFromHierarchyInfo:imageCompression:fileName:)
     func data(from info: HierarchyInfo,
               imageCompression compression: CGFloat,
               fileName: AutoreleasingUnsafeMutablePointer<NSString?>?) -> Data?
@@ -86,7 +85,6 @@ final class ExportManager: NSObject {
 
     /// Asks where to save `displayItem`'s group screenshot and writes it as TIFF.
     @MainActor
-    @objc(exportScreenshotWithDisplayItem:)
     class func exportScreenshot(with displayItem: DisplayItem) {
         guard let image = displayItem.groupScreenshot,
               let imageData = image.tiffRepresentation(using: .lzw, factor: 1)
diff --git a/LookInside/GestureDebug/GestureDebugWindowController.swift b/LookInside/GestureDebug/GestureDebugWindowController.swift
index faa3160d..a877603d 100644
--- a/LookInside/GestureDebug/GestureDebugWindowController.swift
+++ b/LookInside/GestureDebug/GestureDebugWindowController.swift
@@ -8,7 +8,6 @@ final class GestureDebugWindowController: NSWindowController, NSWindowDelegate {
     private var appObservation: NSKeyValueObservation?
     private weak var inspectionOwner: StaticWindowController?
 
-    @objc(initWithOwner:)
     init(owner: StaticWindowController) {
         let window = NSWindow(
             contentRect: NSRect(x: 0, y: 0, width: 1180, height: 740),
diff --git a/LookInside/Hierarchy/HierarchyDataSource+KeyDown.swift b/LookInside/Hierarchy/HierarchyDataSource+KeyDown.swift
index 1c7f94de..72cdb4b2 100644
--- a/LookInside/Hierarchy/HierarchyDataSource+KeyDown.swift
+++ b/LookInside/Hierarchy/HierarchyDataSource+KeyDown.swift
@@ -12,7 +12,6 @@ import LookInsideHostCore
 extension HierarchyDataSource {
     /// Arrow keys move the selection and expand or collapse rows. Returns
     /// whether the key was handled.
-    @objc(keyDown:)
     func keyDown(_ event: NSEvent) -> Bool {
         let rows = displayingFlatItems ?? []
         let selectedRow = selectedItem.flatMap { selected in rows.firstIndex { $0 === selected } }
diff --git a/LookInside/Hierarchy/HierarchyDataSource.swift b/LookInside/Hierarchy/HierarchyDataSource.swift
index c61bc87c..cfa28fc2 100644
--- a/LookInside/Hierarchy/HierarchyDataSource.swift
+++ b/LookInside/Hierarchy/HierarchyDataSource.swift
@@ -118,7 +118,7 @@ class HierarchyDataSource: NSObject {
     final let didReloadFlatItemsWithSearchOrFocus = SyncSignal<Void>()
 
     /// Every display item of the tree, visible or not.
-    @objc var rawFlatItems: [DisplayItem]? {
+    var rawFlatItems: [DisplayItem]? {
         get { storedRawFlatItems }
         set {
             storedRawFlatItems = newValue
@@ -128,7 +128,7 @@ class HierarchyDataSource: NSObject {
 
     /// All items in normal state; the shown subset while searching or
     /// focusing.
-    @objc dynamic var flatItems: [DisplayItem]?
+    var flatItems: [DisplayItem]?
 
     /// The rows: the items of `flatItems` that no collapsed ancestor hides.
     /// KVO-observable.
@@ -148,17 +148,17 @@ class HierarchyDataSource: NSObject {
         }
     }
 
-    @objc var selectColorMenu: NSMenu? {
+    var selectColorMenu: NSMenu? {
         storedSelectColorMenu
     }
 
     /// The tag of the color menu's "Other…" item.
-    @objc var customColorMenuItemTag: Int {
+    var customColorMenuItemTag: Int {
         10
     }
 
     /// The tag of the color menu's "switch color format" item.
-    @objc var toggleColorFormatMenuItemTag: Int {
+    var toggleColorFormatMenuItemTag: Int {
         11
     }
 
@@ -169,9 +169,9 @@ class HierarchyDataSource: NSObject {
 
     /// While the dashboard is being searched, the preview must not change the
     /// selection when a layer is clicked.
-    @objc var shouldAvoidChangingPreviewSelectionDueToDashboardSearch: Bool = false
+    var shouldAvoidChangingPreviewSelectionDueToDashboardSearch: Bool = false
 
-    @objc var serverSideIsSwiftProject: Bool {
+    var serverSideIsSwiftProject: Bool {
         storedServerSideIsSwiftProject
     }
 
@@ -222,7 +222,6 @@ class HierarchyDataSource: NSObject {
 
     // MARK: - Reload
 
-    @objc(reloadWithHierarchyInfo:keepState:)
     func reload(with info: HierarchyInfo?, keepState: Bool) {
         // Path identifiers of the old items resolve their root index against
         // the old root items, so take them before replacing the info.
@@ -338,11 +337,10 @@ class HierarchyDataSource: NSObject {
 
     // MARK: - Rows
 
-    @objc func numberOfRows() -> Int {
+    func numberOfRows() -> Int {
         displayingFlatItems?.count ?? 0
     }
 
-    @objc(itemAtRow:)
     func item(atRow index: Int) -> DisplayItem? {
         guard let rows = displayingFlatItems, rows.indices.contains(index) else {
             return nil
@@ -350,17 +348,15 @@ class HierarchyDataSource: NSObject {
         return rows[index]
     }
 
-    @objc(rowForItem:)
     func row(for item: DisplayItem?) -> Int {
         displayingFlatItems?.firstIndex { $0 === item } ?? NSNotFound
     }
 
-    @objc(displayItemWithOid:)
     func displayItem(withOid oid: UInt) -> DisplayItem? {
         oidToDisplayItem[oid]
     }
 
-    @objc func buildDisplayingFlatItems() {
+    func buildDisplayingFlatItems() {
         let showSystemLayoutGuides = PreferenceManager.shared.showSystemLayoutGuides.currentBOOLValue
         let rows = (flatItems ?? []).filter { item in
             guard item.displayingInHierarchy else {
@@ -420,7 +416,6 @@ class HierarchyDataSource: NSObject {
         item?.notifyHoverChangeToDelegates()
     }
 
-    @objc(selectAndRevealItem:)
     func selectAndRevealItem(_ item: DisplayItem?) {
         guard let item else {
             return
@@ -456,7 +451,6 @@ class HierarchyDataSource: NSObject {
     ///   - referenceDict: expansion by path identifier; an item with an
     ///     entry keeps it instead of the preset.
     ///   - selectedItem: receives the item the preset suggests selecting.
-    @objc(adjustExpansionByIndex:referenceDict:selectedItem:)
     func adjustExpansion(
         by index: Int,
         referenceDict: [String: NSNumber]?,
@@ -662,7 +656,6 @@ class HierarchyDataSource: NSObject {
         }
     }
 
-    @objc(collapseItem:)
     func collapse(_ item: DisplayItem?) {
         guard let item, item.isExpandable, item.isExpanded else {
             return
@@ -672,7 +665,6 @@ class HierarchyDataSource: NSObject {
         persistExpansionStateToPreferences()
     }
 
-    @objc(expandItem:)
     func expand(_ item: DisplayItem?) {
         guard let item, item.isExpandable, !item.isExpanded else {
             return
@@ -682,7 +674,6 @@ class HierarchyDataSource: NSObject {
         persistExpansionStateToPreferences()
     }
 
-    @objc(expandToShowItem:)
     func expand(toShow item: DisplayItem?) {
         var didChange = false
         item?.enumerateAncestors { ancestor, _ in
@@ -698,7 +689,6 @@ class HierarchyDataSource: NSObject {
         }
     }
 
-    @objc(expandItemsRootedByItem:)
     func expandItemsRooted(by item: DisplayItem?) {
         let includePreferredCollapsed = item?.preferToBeCollapsed ?? false
         item?.enumerateSelfAndChildren { node in
@@ -713,7 +703,6 @@ class HierarchyDataSource: NSObject {
         persistExpansionStateToPreferences()
     }
 
-    @objc(collapseAllChildrenOfItem:)
     func collapseAllChildren(of item: DisplayItem?) {
         item?.enumerateSelfAndChildren { node in
             guard node !== item, node.isExpandable, node.isExpanded else {
@@ -730,7 +719,6 @@ class HierarchyDataSource: NSObject {
     /// "<rootIndex>/<class>:<siblingIndex>/..." from the root to `item`; nil
     /// when a node of the chain has no class (UserCustom-only nodes), when
     /// a sibling index cannot be resolved, or when `rootItems` is empty.
-    @objc(pathIdentifierForItem:inRootItems:)
     class func pathIdentifier(for item: DisplayItem?, inRootItems rootItems: [DisplayItem]?) -> String? {
         guard let item else {
             return nil
@@ -749,7 +737,7 @@ class HierarchyDataSource: NSObject {
     /// the target app's bundle identifier, so a cold reload restores the
     /// user's collapses too. Does nothing when remembering is off or there is
     /// no bundle identifier.
-    @objc func persistExpansionStateToPreferences() {
+    func persistExpansionStateToPreferences() {
         let preferences = preferenceManager()
         guard preferences.rememberExpansionState else {
             return
@@ -778,7 +766,6 @@ class HierarchyDataSource: NSObject {
 
     /// Call while the user types a non-empty search string; replaces
     /// `flatItems` and `displayingFlatItems`.
-    @objc(searchWithString:)
     func search(with string: String?) {
         guard let string, !string.isEmpty else {
             assertionFailure("searching for an empty string")
@@ -815,7 +802,7 @@ class HierarchyDataSource: NSObject {
 
     /// Call when the search field is closed; restores the expansion from
     /// before the search and keeps the selection visible.
-    @objc func endSearch() {
+    func endSearch() {
         guard state != .normal else {
             return
         }
@@ -838,7 +825,6 @@ class HierarchyDataSource: NSObject {
     }
 
     /// Entered from the normal or the search state.
-    @objc(focusDisplayItem:)
     func focus(_ item: DisplayItem?) {
         guard let item else {
             assertionFailure("focusing nil")
@@ -862,7 +848,7 @@ class HierarchyDataSource: NSObject {
         buildDisplayingFlatItems()
     }
 
-    @objc func endFocus() {
+    func endFocus() {
         guard state != .normal else {
             return
         }
@@ -886,7 +872,6 @@ class HierarchyDataSource: NSObject {
     // MARK: - SwiftUI jumps
 
     /// SwiftUI node -> its matched CALayer nodes; empty when there is none.
-    @objc(swiftUIBackingLayerItemsForItem:)
     func swiftUIBackingLayerItems(for item: DisplayItem?) -> [DisplayItem]? {
         guard let item else {
             return []
@@ -907,7 +892,6 @@ class HierarchyDataSource: NSObject {
     }
 
     /// CALayer node -> its SwiftUI node, or nil.
-    @objc(swiftUISourceItemForLayerItem:)
     func swiftUISourceItem(forLayerItem item: DisplayItem?) -> DisplayItem? {
         guard let item, let displayListID = item.swiftUILayerDisplayListID() else {
             return nil
@@ -917,7 +901,6 @@ class HierarchyDataSource: NSObject {
 
     /// Dashboard row -> its SwiftUI / CALayer jump target, or nil when the
     /// row has none.
-    @objc(swiftUIJumpTargetForAttribute:)
     func swiftUIJumpTarget(for attribute: InspectedAttribute?) -> DisplayItem? {
         guard let attribute, let sourceItem = attribute.targetDisplayItem, let value = attribute.value as? String else {
             return nil
@@ -1011,7 +994,6 @@ class HierarchyDataSource: NSObject {
     // MARK: - Colors
 
     /// The hierarchy's alias names of `color`, or nil.
-    @objc(aliasForColor:)
     func alias(for color: NSColor?) -> [String]? {
         guard let color else {
             return nil
@@ -1125,13 +1107,13 @@ class HierarchyDataSource: NSObject {
     // MARK: - Others
 
     /// Subclasses return their preference manager.
-    @objc func preferenceManager() -> PreferenceManager {
+    func preferenceManager() -> PreferenceManager {
         assertionFailure("should implement by subclass")
         return PreferenceManager.shared
     }
 
     /// YES in read-only mode, such as an opened file.
-    @objc func isReadOnly() -> Bool {
+    func isReadOnly() -> Bool {
         true
     }
 
diff --git a/LookInside/Hierarchy/HierarchyView.swift b/LookInside/Hierarchy/HierarchyView.swift
index d11c13e5..b9e89216 100644
--- a/LookInside/Hierarchy/HierarchyView.swift
+++ b/LookInside/Hierarchy/HierarchyView.swift
@@ -64,9 +64,8 @@ protocol HierarchyViewDelegate: AnyObject {
 
 class HierarchyView: BaseView {
     let tableView: TableView
-    /// The filter field under the rows. The DEBUG UI snapshots type into it
-    /// and read it by key.
-    @objc let searchTextFieldView: TextFieldView
+    /// The filter field under the rows. The DEBUG UI snapshots type into it.
+    let searchTextFieldView: TextFieldView
     var dataSource: HierarchyDataSource
     /// Phase A 引入:由 owner(StaticHierarchyController / StaticViewController 链路)注入的 per-instance update manager(weak)。
     /// 若 nil 则 fallback 到 +sharedInstance,以保留 read-only / archive workspace 的 legacy 行为。
@@ -143,7 +142,6 @@ class HierarchyView: BaseView {
             : NSColor(red: 0, green: 0, blue: 0, alpha: 0.3).cgColor
     }
 
-    @objc(scrollToMakeItemVisible:)
     func scroll(toMakeItemVisible item: DisplayItem?) {
         guard let item, let row = displayItems.firstIndex(where: { $0 === item }) else {
             return
diff --git a/LookInside/Injection/Device/DeviceInjectionFlow.swift b/LookInside/Injection/Device/DeviceInjectionFlow.swift
index e2c4727e..e2a14b21 100644
--- a/LookInside/Injection/Device/DeviceInjectionFlow.swift
+++ b/LookInside/Injection/Device/DeviceInjectionFlow.swift
@@ -20,7 +20,7 @@ import RunningApplicationKit
 /// are still bugs and still need fixing; this just stops them being hit every
 /// single time.
 final class DeviceInjectionFlow: NSObject {
-    @objc(sharedInstance) static let shared = DeviceInjectionFlow()
+    static let shared = DeviceInjectionFlow()
 
     private var picker: InjectionTargetPicker?
     private var startGate = InjectionStartGate()
@@ -38,7 +38,7 @@ final class DeviceInjectionFlow: NSObject {
         }
     }
 
-    @objc func startFromWindow(_ window: NSWindow?) {
+    func startFromWindow(_ window: NSWindow?) {
         let decision = startGate.begin {
             SwiftUISupportGatekeeper.sharedInstance().canUseProtectedFeatureWithoutPrompt()
         }
diff --git a/LookInside/Injection/InjectionFlow.swift b/LookInside/Injection/InjectionFlow.swift
index b2449b17..63d29739 100644
--- a/LookInside/Injection/InjectionFlow.swift
+++ b/LookInside/Injection/InjectionFlow.swift
@@ -15,12 +15,12 @@ import Foundation
 ///    `LaunchViewController` 1.5s refresh tick then discovers the newly
 ///    inspectable app automatically.
 final class InjectionFlow: NSObject {
-    @objc(sharedInstance) static let shared = InjectionFlow()
+    static let shared = InjectionFlow()
 
     private var picker: InjectionTargetPicker?
     private var startGate = InjectionStartGate()
 
-    @objc func startFromWindow(_ window: NSWindow?) {
+    func startFromWindow(_ window: NSWindow?) {
         let decision = startGate.begin {
             SwiftUISupportGatekeeper.sharedInstance().canUseProtectedFeatureWithoutPrompt()
         }
diff --git a/LookInside/Launch/LaunchAppView.swift b/LookInside/Launch/LaunchAppView.swift
index 64fa517a..62b02252 100644
--- a/LookInside/Launch/LaunchAppView.swift
+++ b/LookInside/Launch/LaunchAppView.swift
@@ -54,11 +54,11 @@ final class LaunchAppView: BaseControl {
     }
 
     /// The smaller metrics the apps popover uses. Defaults to false.
-    @objc var compactLayout = false {
+    var compactLayout = false {
         didSet { applyLayoutMetrics() }
     }
 
-    @objc var app: InspectableApp? {
+    var app: InspectableApp? {
         didSet { appDidChange() }
     }
 
diff --git a/LookInside/Launch/LaunchViewController.swift b/LookInside/Launch/LaunchViewController.swift
index 598e569e..e8e5200a 100644
--- a/LookInside/Launch/LaunchViewController.swift
+++ b/LookInside/Launch/LaunchViewController.swift
@@ -38,12 +38,6 @@ final class LaunchViewController: BaseViewController {
     /// images again.
     private var appInfos: [InspectedAppInfo]?
 
-    @objc(initWithWindow:)
-    convenience init(window: NSWindow?) {
-        self.init(window: window, autoEnterOnInitialReload: false)
-    }
-
-    @objc(initWithWindow:autoEnterOnInitialReload:)
     init(window: NSWindow?, autoEnterOnInitialReload: Bool) {
         self.window = window
         self.autoEnterOnInitialReload = autoEnterOnInitialReload
diff --git a/LookInside/Launch/LaunchWindowController.swift b/LookInside/Launch/LaunchWindowController.swift
index 913fc95b..fd77195d 100644
--- a/LookInside/Launch/LaunchWindowController.swift
+++ b/LookInside/Launch/LaunchWindowController.swift
@@ -10,11 +10,10 @@ import AppKit
 
 /// The small launch window that lists the inspectable apps.
 final class LaunchWindowController: WindowController {
-    @objc let launchViewController: LaunchViewController
+    let launchViewController: LaunchViewController
 
     /// - Parameter autoEnterOnInitialReload: whether the first scan opens
     ///   the only app it finds by itself.
-    @objc(initWithAutoEnterOnInitialReload:)
     init(autoEnterOnInitialReload: Bool) {
         let window = AppWindow(
             contentRect: NSRect(x: 0, y: 0, width: 252, height: 400),
@@ -33,10 +32,6 @@ final class LaunchWindowController: WindowController {
         contentViewController = launchViewController
     }
 
-    @objc convenience init() {
-        self.init(autoEnterOnInitialReload: false)
-    }
-
     @available(*, unavailable)
     required init?(coder _: NSCoder) {
         fatalError("init(coder:) is not supported")
diff --git a/LookInside/MCPBridge/MCPBridgeServer.swift b/LookInside/MCPBridge/MCPBridgeServer.swift
index 2a1dd06d..dece2a33 100644
--- a/LookInside/MCPBridge/MCPBridgeServer.swift
+++ b/LookInside/MCPBridge/MCPBridgeServer.swift
@@ -25,7 +25,7 @@ import FoundationToolbox
 final class MCPBridgeServer: NSObject {
     // MARK: - Singleton
 
-    @objc static let sharedInstance = MCPBridgeServer()
+    static let sharedInstance = MCPBridgeServer()
 
     // MARK: - Configuration
 
@@ -108,7 +108,7 @@ final class MCPBridgeServer: NSObject {
 
     // MARK: - Lifecycle
 
-    @objc func start() {
+    func start() {
         stateQueue.async { [weak self] in
             guard let self else { return }
             guard self.isRunning == false else { return }
@@ -124,7 +124,7 @@ final class MCPBridgeServer: NSObject {
         }
     }
 
-    @objc func stop() {
+    func stop() {
         stateQueue.async { [weak self] in
             guard let self else { return }
             guard self.isRunning else { return }
diff --git a/LookInside/Manager/NavigationManager.swift b/LookInside/Manager/NavigationManager.swift
index 4a02e253..de80d9f8 100644
--- a/LookInside/Manager/NavigationManager.swift
+++ b/LookInside/Manager/NavigationManager.swift
@@ -20,7 +20,7 @@ final class NavigationManager: NSObject, NSWindowDelegate {
         super.init()
     }
 
-    @objc private(set) var launchWindowController: LaunchWindowController?
+    private(set) var launchWindowController: LaunchWindowController?
 
     /// Kept for the app's lifetime rather than dropped on close, so the
     /// window opens again on the page the user left it on.
@@ -41,29 +41,28 @@ final class NavigationManager: NSObject, NSWindowDelegate {
     private var jsonWindowController: JSONAttributeWindowController?
 
     /// Set by the hierarchy view from its top inset.
-    @objc var windowTitleBarHeight: CGFloat = 0
+    var windowTitleBarHeight: CGFloat = 0
 
-    @objc func showLaunch() {
+    func showLaunch() {
         showLaunch(allowingAutoEnter: false)
     }
 
-    @objc(showLaunchAllowingAutoEnter:)
     func showLaunch(allowingAutoEnter allowAutoEnter: Bool) {
         let controller = LaunchWindowController(autoEnterOnInitialReload: allowAutoEnter)
         launchWindowController = controller
         controller.showWindow(self)
     }
 
-    @objc func closeLaunch() {
+    func closeLaunch() {
         launchWindowController?.close()
         launchWindowController = nil
     }
 
-    @objc func showSettings() {
+    func showSettings() {
         settingsWindowController.showWindow(self)
     }
 
-    @objc func showAbout() {
+    func showAbout() {
         let controller = aboutWindowController ?? {
             let controller = AboutWindowController()
             controller.window?.delegate = self
@@ -73,7 +72,6 @@ final class NavigationManager: NSObject, NSWindowDelegate {
         controller.showWindow(self)
     }
 
-    @objc(showJsonWindow:)
     func showJSONWindow(_ json: String?) {
         let controller = jsonWindowController ?? {
             let controller = JSONAttributeWindowController()
@@ -86,7 +84,7 @@ final class NavigationManager: NSObject, NSWindowDelegate {
     }
 
     /// The window controller of the key window, when it is one of ours.
-    @objc func currentKeyWindowController() -> WindowController? {
+    func currentKeyWindowController() -> WindowController? {
         NSApplication.shared.keyWindow?.windowController as? WindowController
     }
 
@@ -94,7 +92,6 @@ final class NavigationManager: NSObject, NSWindowDelegate {
     /// get Recent Documents, Open Recent, proxy icon dragging and the reuse
     /// of an already open file. Opening is asynchronous; an error is
     /// presented with `NSApp.presentError`, so this never throws.
-    @objc(showReaderWithFilePath:error:)
     func showReader(withFilePath filePath: String) throws {
         let fileURL = URL(fileURLWithPath: filePath)
         NSDocumentController.shared.openDocument(withContentsOf: fileURL, display: true) { document, _, openError in
@@ -107,7 +104,6 @@ final class NavigationManager: NSObject, NSWindowDelegate {
     /// Wraps an in-memory hierarchy in an untitled `ArchiveDocument`,
     /// so it gets the same document life cycle (Save As, Versions, Recent on
     /// save) as a file-backed archive, and shows its window.
-    @objc(showReaderWithHierarchyFile:title:)
     func showReader(with file: HierarchyFile?, title: String?) {
         let document = ArchiveDocument()
         document.hierarchyFile = file
diff --git a/LookInside/Manager/PreferenceManager.swift b/LookInside/Manager/PreferenceManager.swift
index 78c524ae..5f6e1020 100644
--- a/LookInside/Manager/PreferenceManager.swift
+++ b/LookInside/Manager/PreferenceManager.swift
@@ -43,16 +43,7 @@ let NotificationName_DidChangeSectionShowing = "NotificationName_DidChangeSectio
     case focus
 }
 
-@objc enum PreferredCallStackType: Int {
-    /// Formatted and shortened.
-    case `default`
-    /// Formatted, complete.
-    case formattedCompletely
-    /// The raw call stack.
-    case raw
-}
-
-@objc enum MeasureState: Int {
+enum MeasureState: Int {
     /// Not measuring.
     case no
     /// Measuring until the key is released.
@@ -99,7 +90,7 @@ final class PreferenceManager: NSObject {
     }
 
     /// 默认为 NO
-    @objc var shouldStoreToLocal = false
+    var shouldStoreToLocal = false
 
     @objc dynamic var appearanceType: PreferredAppearanceType {
         didSet {
@@ -115,7 +106,7 @@ final class PreferenceManager: NSObject {
     }
 
     /// 有效值为 0 ～ 4
-    @objc dynamic var expansionIndex: Int {
+    var expansionIndex: Int {
         didSet {
             guard oldValue != expansionIndex else { return }
             store(expansionIndex, forKey: Key.expansionIndex)
@@ -124,21 +115,21 @@ final class PreferenceManager: NSObject {
 
     /// Not stored: the subscription in the Objective-C version targeted
     /// `showHiddenItems` before it existed, so changes were never written.
-    @objc let showOutline: BoolMessageAttribute
+    let showOutline: BoolMessageAttribute
 
-    @objc let showHiddenItems: BoolMessageAttribute
+    let showHiddenItems: BoolMessageAttribute
 
     /// 是否在层级树里显示系统自动创建的 LayoutGuide（safe area、layout margins 等）。
     /// 默认显示；关闭只是宿主端过滤，数据仍在。用户自建 guide 不受此开关影响。
-    @objc let showSystemLayoutGuides: BoolMessageAttribute
+    let showSystemLayoutGuides: BoolMessageAttribute
 
     /// 是否显示 view 的 backing layer 子树（backing-layer-toggle 提案）。
     /// 默认关闭。开启后像 Xcode 的 Show Layers：每个 view 节点下展开完整 layer 子树，
     /// 内容显示在真正渲染它的 layer 上，view 节点变为线框。切换时重新拉取层级。
-    @objc let showBackingLayers: BoolMessageAttribute
+    let showBackingLayers: BoolMessageAttribute
 
     /// 范围是 0 ～ 1
-    @objc let zInterspace: DoubleMessageAttribute
+    let zInterspace: DoubleMessageAttribute
 
     @objc dynamic var rgbaFormat: Bool {
         didSet {
@@ -173,7 +164,7 @@ final class PreferenceManager: NSObject {
     }
 
     /// 被折叠的 AttrGroup
-    @objc dynamic var collapsedAttrGroups: [String] {
+    var collapsedAttrGroups: [String] {
         didSet {
             store(collapsedAttrGroups, forKey: Key.collapsedGroups)
         }
@@ -212,19 +203,19 @@ final class PreferenceManager: NSObject {
         }
     }
 
-    @objc let freeRotation: BoolMessageAttribute
+    let freeRotation: BoolMessageAttribute
 
-    @objc let fastMode: BoolMessageAttribute
+    let fastMode: BoolMessageAttribute
 
     /// 上次接收到 iOS app 里传过来的 color config 和 collapsedClasses 信息的时间，用来统计
     /// Always stored, even when `shouldStoreToLocal` is off.
-    @objc dynamic var receivingConfigTime_Color: TimeInterval {
+    var receivingConfigTime_Color: TimeInterval {
         didSet {
             defaults.set(receivingConfigTime_Color, forKey: Key.receivingConfigTimeColor)
         }
     }
 
-    @objc dynamic var receivingConfigTime_Class: TimeInterval {
+    var receivingConfigTime_Class: TimeInterval {
         didSet {
             defaults.set(receivingConfigTime_Class, forKey: Key.receivingConfigTimeClass)
         }
@@ -234,30 +225,16 @@ final class PreferenceManager: NSObject {
 
     // MARK: - Not stored
 
-    private var storedCallStackType: PreferredCallStackType = .default
-
-    @objc dynamic var callStackType: PreferredCallStackType {
-        get { storedCallStackType }
-        set {
-            if newValue.rawValue < 0 || newValue.rawValue > 2 {
-                assertionFailure("callStackType out of range: \(newValue.rawValue)")
-                storedCallStackType = .default
-            } else {
-                storedCallStackType = newValue
-            }
-        }
-    }
-
     /// 参数是 PreviewDimension
-    @objc let previewDimension: IntegerMessageAttribute
+    let previewDimension: IntegerMessageAttribute
 
-    @objc let previewScale: DoubleMessageAttribute
+    let previewScale: DoubleMessageAttribute
 
     /// 参数是 MeasureState
-    @objc let measureState: IntegerMessageAttribute
+    let measureState: IntegerMessageAttribute
 
     /// 是否用户正在按住 cmd 键而处于快速选择模式
-    @objc let isQuickSelecting: BoolMessageAttribute
+    let isQuickSelecting: BoolMessageAttribute
 
     // MARK: - Init
 
@@ -376,7 +353,6 @@ final class PreferenceManager: NSObject {
     /// 读取某 bundle id 下记录的展开/折叠状态。key 为结构路径，value 为 @(YES) 表示展开、@(NO) 表示折叠。
     /// 未命中返回空字典。为兼容早期仅记录 expanded paths 的存档（NSArray<NSString *>），
     /// 读到旧格式时会自动转换为 dict 形式（全部视为 @(YES)）。
-    @objc(expansionStateForBundleIdentifier:)
     func expansionState(forBundleIdentifier bundleIdentifier: String?) -> [String: NSNumber] {
         guard let bundleIdentifier, !bundleIdentifier.isEmpty else {
             return [:]
@@ -388,7 +364,6 @@ final class PreferenceManager: NSObject {
     /// 写入某 bundle id 下记录的展开/折叠状态，并将该 bundle id 提升到 LRU 队首。
     /// 当 LRU 超过容量上限时，最旧的 bundle id 会被静默移除（其对应的展开状态键也会被清理）。
     /// 若 rememberExpansionState 为 NO 或 bundleIdentifier 为空，则不做任何操作。
-    @objc(setExpansionState:forBundleIdentifier:)
     func setExpansionState(_ expansionState: [String: NSNumber]?, forBundleIdentifier bundleIdentifier: String?) {
         guard let bundleIdentifier, !bundleIdentifier.isEmpty, rememberExpansionState, shouldStoreToLocal else {
             return
@@ -404,7 +379,6 @@ final class PreferenceManager: NSObject {
 
     /// 将一个已记录的 bundle id 提升到 LRU 队首。若该 bundle id 未被记录则不做任何操作。
     /// 当 rememberExpansionState 为 NO 或 bundleIdentifier 为空时同样不做任何操作。
-    @objc(bumpExpansionStateBundleIdentifierToMostRecent:)
     func bumpExpansionStateBundleIdentifierToMostRecent(_ bundleIdentifier: String?) {
         guard let bundleIdentifier, !bundleIdentifier.isEmpty, rememberExpansionState, shouldStoreToLocal else {
             return
@@ -446,7 +420,7 @@ final class PreferenceManager: NSObject {
     // MARK: - Dashboard sections
 
     /// 返回某个 section 是否应该被显示在主界面上
-    @objc func isSectionShowing(_ secID: String) -> Bool {
+    func isSectionShowing(_ secID: String) -> Bool {
         if let stored = storedSectionShowConfig[secID] {
             return stored
         }
@@ -454,12 +428,12 @@ final class PreferenceManager: NSObject {
     }
 
     /// 把某个 section 显示在主界面上
-    @objc func showSection(_ secID: String) {
+    func showSection(_ secID: String) {
         setSection(secID, showing: true)
     }
 
     /// 把某个 section 从主界面上移除
-    @objc func hideSection(_ secID: String) {
+    func hideSection(_ secID: String) {
         setSection(secID, showing: false)
     }
 
@@ -474,7 +448,7 @@ final class PreferenceManager: NSObject {
         defaults.set(storedSectionShowConfig, forKey: Key.sectionsShow)
     }
 
-    @objc func reset() {}
+    func reset() {}
 
     /// 返回默认情况下，哪些 section 应该被显示在主界面上
     private static let sectionsShowingByDefault: Set<String> = Set(([
diff --git a/LookInside/Measure/MeasureController.swift b/LookInside/Measure/MeasureController.swift
index e22e928b..7d3cb64d 100644
--- a/LookInside/Measure/MeasureController.swift
+++ b/LookInside/Measure/MeasureController.swift
@@ -23,7 +23,6 @@ final class MeasureController: BaseViewController {
     private var lockSwitchButton: NSButton?
     private var itemObservations: [NSKeyValueObservation] = []
 
-    @objc(initWithDataSource:)
     init(dataSource: HierarchyDataSource) {
         self.dataSource = dataSource
         super.init(containerView: nil)
diff --git a/LookInside/Other/VersionComparer.swift b/LookInside/Other/VersionComparer.swift
index db83fd97..6811ae98 100644
--- a/LookInside/Other/VersionComparer.swift
+++ b/LookInside/Other/VersionComparer.swift
@@ -10,15 +10,8 @@ import Foundation
 import LookInsideHostCore
 
 final class VersionComparer: NSObject {
-    /// latest 指网上最高的 LookinServer 版本号，user 指用户真实的版本号。如果用户版本号低于最高版本号，则该方法返回 NO，此时应该提示用户升级。
-    @objc(compareWithNewest:user:)
-    static func compare(newest latest: String?, user: String?) -> Bool {
-        compare(expectedVersion: latest, realVersion: user)
-    }
-
     /// 如果 realVersion 等于或高于 expectedVersion，则该方法返回 YES（换句话说：用户的实际版本号满足我们的需要）
     /// A nil version reads as unparseable.
-    @objc(compareWithExpectedVersion:realVersion:)
     static func compare(expectedVersion: String?, realVersion: String?) -> Bool {
         let expected = expectedVersion ?? ""
         let real = realVersion ?? ""
diff --git a/LookInside/PrivateDiscriminator/PrivateDiscriminatorStore.swift b/LookInside/PrivateDiscriminator/PrivateDiscriminatorStore.swift
index cc6ca15d..a70ccfcb 100644
--- a/LookInside/PrivateDiscriminator/PrivateDiscriminatorStore.swift
+++ b/LookInside/PrivateDiscriminator/PrivateDiscriminatorStore.swift
@@ -64,7 +64,7 @@ struct PrivateDiscriminatorInvalidDiagnostic: Identifiable, Hashable {
 /// observes the state below through Observation.
 @Observable
 final class PrivateDiscriminatorStore: NSObject {
-    @objc(shared) static let shared = PrivateDiscriminatorStore()
+    static let shared = PrivateDiscriminatorStore()
 
     private(set) var featureEnabled = false
     private(set) var autosaveEnabled = false
@@ -74,10 +74,6 @@ final class PrivateDiscriminatorStore: NSObject {
     private(set) var isUpdatingDefaultLibrary = false
     private(set) var lastDefaultLibraryUpdateMessage: String?
 
-    @objc var isFeatureEnabled: Bool {
-        featureEnabled
-    }
-
     let storageDirectoryURL: URL
     let importedDirectoryURL: URL
     let autosavedDirectoryURL: URL
@@ -247,7 +243,6 @@ final class PrivateDiscriminatorStore: NSObject {
         }
     }
 
-    @objc(displayTitleForDisplayItem:fallback:)
     func displayTitle(for _: DisplayItem, fallback: String?) -> String? {
         guard featureEnabled, let fallback, !fallback.isEmpty else {
             return fallback
@@ -256,7 +251,6 @@ final class PrivateDiscriminatorStore: NSObject {
         return cleaned.isEmpty ? fallback : cleaned
     }
 
-    @objc(isPrivateDisplayItem:)
     func isPrivateDisplayItem(_ item: DisplayItem) -> Bool {
         guard featureEnabled else {
             return false
@@ -264,7 +258,6 @@ final class PrivateDiscriminatorStore: NSObject {
         return parsedPrivateDiscriminator(for: item) != nil
     }
 
-    @objc(appendingPrivateDiscriminatorGroupToGroups:forDisplayItem:)
     func appendingPrivateDiscriminatorGroup(to groups: [AttributesGroup], for item: DisplayItem) -> [AttributesGroup] {
         guard featureEnabled, let descriptor = dashboardDescriptor(for: item) else {
             return groups
@@ -280,7 +273,6 @@ final class PrivateDiscriminatorStore: NSObject {
         return result
     }
 
-    @objc(submitPrivateDiscriminatorForDisplayItem:module:filename:error:)
     func submitPrivateDiscriminator(for item: DisplayItem, module: String, filename: String, error: NSErrorPointer) -> Bool {
         do {
             guard let parsed = parsedPrivateDiscriminator(for: item) else {
@@ -306,7 +298,6 @@ final class PrivateDiscriminatorStore: NSObject {
         }
     }
 
-    @objc(importPrivateDiscriminatorFromCodebaseForDisplayItem:window:error:)
     func importPrivateDiscriminatorFromCodebase(for item: DisplayItem, window: NSWindow?, error: NSErrorPointer) -> Bool {
         do {
             guard let parsed = parsedPrivateDiscriminator(for: item) else {
@@ -340,7 +331,6 @@ final class PrivateDiscriminatorStore: NSObject {
         }
     }
 
-    @objc(beginSwiftPDGuessForDisplayItem:window:)
     func beginSwiftPDGuess(for item: DisplayItem, window: NSWindow?) {
         guard let parsed = parsedPrivateDiscriminator(for: item) else {
             return
@@ -407,7 +397,6 @@ final class PrivateDiscriminatorStore: NSObject {
         }
     }
 
-    @objc(cancelSwiftPDGuessForDisplayItem:)
     func cancelSwiftPDGuess(for item: DisplayItem) {
         guard let parsed = parsedPrivateDiscriminator(for: item),
               let task = activeGuessTasksByID[parsed.id]
@@ -743,7 +732,6 @@ final class PrivateDiscriminatorStore: NSObject {
             isMatched: false,
             isVerified: false,
             warning: nil,
-            className: parsed.className,
             guessState: dashboardGuessState(for: parsed.id, isMatched: false)
         )
     }
@@ -763,7 +751,6 @@ final class PrivateDiscriminatorStore: NSObject {
             isMatched: true,
             isVerified: verification.isMatch,
             warning: verification.isMatch ? nil : Self.message(for: verification),
-            className: parsed.className,
             guessState: dashboardGuessState(for: parsed.id, isMatched: true)
         )
     }
@@ -1344,7 +1331,6 @@ private struct DashboardDescriptor {
     let isMatched: Bool
     let isVerified: Bool
     let warning: String?
-    let className: String?
     let guessState: GuessState?
 }
 
@@ -1389,24 +1375,22 @@ private enum GuessState {
 }
 
 final class PrivateDiscriminatorDashboardPayload: NSObject {
-    @objc let discriminatorID: String
-    @objc let module: String
-    @objc let filename: String
-    @objc let source: String
-    @objc let displayClassName: String
-    @objc let isMatched: Bool
-    @objc let isVerified: Bool
-    @objc let warningText: String?
-    @objc let guessStatusText: String?
-    @objc let isGuessRunning: Bool
-    @objc let isGuessFailed: Bool
+    let discriminatorID: String
+    let module: String
+    let filename: String
+    let source: String
+    let isMatched: Bool
+    let isVerified: Bool
+    let warningText: String?
+    let guessStatusText: String?
+    let isGuessRunning: Bool
+    let isGuessFailed: Bool
 
     fileprivate init(descriptor: DashboardDescriptor) {
         discriminatorID = descriptor.id
         module = descriptor.module
         filename = descriptor.filename
         source = descriptor.source?.localizedDisplayName ?? ""
-        displayClassName = descriptor.className ?? ""
         isMatched = descriptor.isMatched
         isVerified = descriptor.isVerified
         warningText = descriptor.warning
diff --git a/LookInside/Read/ArchiveDocument.swift b/LookInside/Read/ArchiveDocument.swift
index 51540405..69033330 100644
--- a/LookInside/Read/ArchiveDocument.swift
+++ b/LookInside/Read/ArchiveDocument.swift
@@ -42,14 +42,13 @@ class ArchiveDocument: NSDocument {
     /// show-backing-layers setting. A `.lookin` archive cannot: its tree is what
     /// the server sent. An imported Xcode capture can, from the decoded capture
     /// it keeps after import.
-    @objc func canRebuildHierarchyFile() -> Bool {
+    func canRebuildHierarchyFile() -> Bool {
         false
     }
 
     /// Rebuilds `hierarchyFile` for the setting and assigns the new file when it
     /// is ready; the window observes the property and rebuilds its reader. A
     /// no-op unless canRebuildHierarchyFile.
-    @objc(rebuildHierarchyFileShowingBackingLayers:)
     func rebuildHierarchyFile(showingBackingLayers _: Bool) {
         // An archive holds the tree the server sent; there is nothing to rebuild from.
     }
diff --git a/LookInside/Read/ReadHierarchyDataSource.swift b/LookInside/Read/ReadHierarchyDataSource.swift
index 40c6ce18..e9389952 100644
--- a/LookInside/Read/ReadHierarchyDataSource.swift
+++ b/LookInside/Read/ReadHierarchyDataSource.swift
@@ -14,7 +14,6 @@ import AppKit
 final class ReadHierarchyDataSource: HierarchyDataSource {
     private let readPreferenceManager: PreferenceManager
 
-    @objc(initWithFile:preferenceManager:)
     init(file: HierarchyFile, preferenceManager manager: PreferenceManager) {
         readPreferenceManager = manager
         super.init()
diff --git a/LookInside/Read/ReadViewController.swift b/LookInside/Read/ReadViewController.swift
index b95b0c07..85bae1f2 100644
--- a/LookInside/Read/ReadViewController.swift
+++ b/LookInside/Read/ReadViewController.swift
@@ -12,7 +12,7 @@ import AppKit
 /// preview, the dashboard or the measure panel on the right; and a tip
 /// while the tree is in focus mode.
 final class ReadViewController: BaseViewController, NSSplitViewDelegate {
-    @objc let hierarchyDataSource: ReadHierarchyDataSource
+    let hierarchyDataSource: ReadHierarchyDataSource
 
     private let splitView = SplitView()
     private let hierarchyController: ReadHierarchyController
@@ -23,7 +23,6 @@ final class ReadViewController: BaseViewController, NSSplitViewDelegate {
     private let focusTipView = YellowTipsView()
     private var stateObservation: NSKeyValueObservation?
 
-    @objc(initWithFile:preferenceManager:)
     init(file: HierarchyFile, preferenceManager manager: PreferenceManager) {
         let dataSource = ReadHierarchyDataSource(file: file, preferenceManager: manager)
         hierarchyDataSource = dataSource
@@ -96,7 +95,7 @@ final class ReadViewController: BaseViewController, NSSplitViewDelegate {
     }
 
     /// The reader's hierarchy list.
-    @objc func currentHierarchyView() -> HierarchyView? {
+    func currentHierarchyView() -> HierarchyView? {
         hierarchyController.hierarchyView
     }
 
diff --git a/LookInside/Read/ReadWindowController.swift b/LookInside/Read/ReadWindowController.swift
index 0faf461a..0d7a210a 100644
--- a/LookInside/Read/ReadWindowController.swift
+++ b/LookInside/Read/ReadWindowController.swift
@@ -18,7 +18,7 @@ final class ReadWindowController: WindowController, NSToolbarDelegate {
     /// This window's own preference set: the reader's view settings, including
     /// the show-backing-layers toggle, are per document window. A document that
     /// can rebuild its tree reads the toggle from here.
-    @objc let preferenceManager = PreferenceManager()
+    let preferenceManager = PreferenceManager()
 
     private var viewController: ReadViewController?
     private var toolbarItemsMap: [String: NSToolbarItem] = [:]
@@ -26,7 +26,6 @@ final class ReadWindowController: WindowController, NSToolbarDelegate {
     private var selectedItemObservation: NSKeyValueObservation?
     private weak var shownFile: HierarchyFile?
 
-    @objc(initWithDocument:)
     init(document: ArchiveDocument) {
         let screenSize = NSScreen.main?.frame.size ?? .zero
         let window = AppWindow(
diff --git a/LookInside/Static/MessageManager.swift b/LookInside/Static/MessageManager.swift
index 2933a329..98dc34ae 100644
--- a/LookInside/Static/MessageManager.swift
+++ b/LookInside/Static/MessageManager.swift
@@ -17,7 +17,7 @@ final class MessageManager: NSObject {
 
     private static let shared = MessageManager()
 
-    @objc class func sharedInstance() -> MessageManager {
+    class func sharedInstance() -> MessageManager {
         shared
     }
 
@@ -27,12 +27,10 @@ final class MessageManager: NSObject {
         super.init()
     }
 
-    @objc(addMessage:)
     func addMessage(_ message: String) {
         messages.insert(message)
     }
 
-    @objc(removeMessage:)
     func removeMessage(_ message: String) {
         messages.remove(message)
         if message == jobsMessageIdentifier {
@@ -41,14 +39,14 @@ final class MessageManager: NSObject {
     }
 
     /// The current messages, shortest first.
-    @objc func queryMessages() -> [String] {
+    func queryMessages() -> [String] {
         // A stable sort over an unordered set: ties keep whatever order the
         // set yields, as NSSet's -allObjects did.
         Array(messages).sorted { $0.utf16.count < $1.utf16.count }
     }
 
     #if DEBUG
-        @objc func reset() {
+        func reset() {
             UserDefaults.standard.removeObject(forKey: Self.hasReadJobsDefaultsKey)
         }
     #endif
diff --git a/LookInside/Static/Preview/DisplayItemNode.swift b/LookInside/Static/Preview/DisplayItemNode.swift
index 0cd7fa40..cec36f6b 100644
--- a/LookInside/Static/Preview/DisplayItemNode.swift
+++ b/LookInside/Static/Preview/DisplayItemNode.swift
@@ -267,7 +267,7 @@ final class DisplayItemNode: SCNNode, DisplayItemDelegate {
         let isSelected = dataSource?.selectedItem === displayItem
         let isHovered = dataSource?.hoveredItem === displayItem
 
-        let screenshot = displayItem?.optionalAppropriateScreenshot
+        let screenshot = displayItem?.appropriateScreenshot()
         if let rep = screenshot?.representations.first {
             assert(CGFloat(Swift.max(rep.pixelsWide, rep.pixelsHigh)) <= CGFloat(LookinNodeImageMaxLengthInPx), "image is too large")
         }
@@ -377,7 +377,7 @@ final class DisplayItemNode: SCNNode, DisplayItemDelegate {
             maskPlane.width = contentPlane.width
             maskPlane.height = contentPlane.height
             if !regionNode.isHidden {
-                let region = region(of: self.displayItem?.optionalAppropriateScreenshot) ?? .zero
+                let region = region(of: self.displayItem?.appropriateScreenshot()) ?? .zero
                 layoutRegionNode(region: region, frameToRoot: frameToRoot)
             }
 
@@ -406,12 +406,3 @@ final class DisplayItemNode: SCNNode, DisplayItemDelegate {
         }
     }
 }
-
-extension DisplayItem {
-    /// `-appropriateScreenshot`, which returns nil for an item without a
-    /// screenshot although its header (inside NS_ASSUME_NONNULL) says it
-    /// never does; read through the runtime so Swift sees the nil.
-    var optionalAppropriateScreenshot: NSImage? {
-        value(forKey: "appropriateScreenshot") as? NSImage
-    }
-}
diff --git a/LookInside/Static/Preview/PreviewController.swift b/LookInside/Static/Preview/PreviewController.swift
index 87f18dcf..3023a34f 100644
--- a/LookInside/Static/Preview/PreviewController.swift
+++ b/LookInside/Static/Preview/PreviewController.swift
@@ -11,10 +11,10 @@ import AppKit
 /// Hosts the 3D preview and turns mouse, trackpad and keyboard input into
 /// rotation, translation, zoom, selection and the context menu.
 final class PreviewController: BaseViewController, NSGestureRecognizerDelegate, NSMenuDelegate, PreviewStageViewDelegate {
-    @objc weak var staticViewController: StaticViewController?
+    weak var staticViewController: StaticViewController?
 
     /// Set by the owner in a live window; nil when reading a `.lookin` file.
-    @objc weak var asyncUpdateManager: StaticAsyncUpdateManager?
+    weak var asyncUpdateManager: StaticAsyncUpdateManager?
 
     private let dataSource: HierarchyDataSource?
     private let previewView: PreviewView
@@ -73,7 +73,6 @@ final class PreviewController: BaseViewController, NSGestureRecognizerDelegate,
         }
     }
 
-    @objc(initWithDataSource:)
     init(dataSource: HierarchyDataSource?) {
         self.dataSource = dataSource
         previewView = PreviewView(dataSource: dataSource)
diff --git a/LookInside/Static/StaticAsyncUpdateManager.swift b/LookInside/Static/StaticAsyncUpdateManager.swift
index 85a466bd..a5df2b17 100644
--- a/LookInside/Static/StaticAsyncUpdateManager.swift
+++ b/LookInside/Static/StaticAsyncUpdateManager.swift
@@ -32,11 +32,11 @@ enum ModifyingUpdateEvent {
 final class StaticAsyncUpdateManager: NSObject {
     /// Set by the owner (window controller / live document), which holds it
     /// strongly.
-    @objc weak var hierarchyDataSource: StaticHierarchyDataSource?
+    weak var hierarchyDataSource: StaticHierarchyDataSource?
 
     /// The app every request goes to. The owner refreshes it when a new
     /// hierarchy arrives or the document reconnects.
-    @objc weak var inspectableApp: InspectableApp?
+    weak var inspectableApp: InspectableApp?
 
     weak var delegate: StaticAsyncUpdateManagerDelegate?
 
@@ -50,7 +50,6 @@ final class StaticAsyncUpdateManager: NSObject {
 
     private let dataSourceSignals = SyncSubscriptionBag()
 
-    @objc(initWithHierarchyDataSource:inspectableApp:)
     init(hierarchyDataSource: StaticHierarchyDataSource?, inspectableApp: InspectableApp?) {
         self.hierarchyDataSource = hierarchyDataSource
         self.inspectableApp = inspectableApp
@@ -60,7 +59,7 @@ final class StaticAsyncUpdateManager: NSObject {
         }
     }
 
-    @objc override convenience init() {
+    override convenience init() {
         self.init(hierarchyDataSource: nil, inspectableApp: nil)
     }
 
@@ -71,7 +70,7 @@ final class StaticAsyncUpdateManager: NSObject {
     // MARK: - Public
 
     /// With fast mode off: after a reload, fetches the details of every item.
-    @objc func updateAll() {
+    func updateAll() {
         assert(!PreferenceManager.shared.fastMode.currentBOOLValue)
         guard inspectableApp != nil, let dataSource, !(dataSource.flatItems ?? []).isEmpty else {
             return
@@ -84,7 +83,7 @@ final class StaticAsyncUpdateManager: NSObject {
 
     /// With fast mode on: fetches the details of the visible items that do
     /// not have them yet. Call it whenever the displayed items change.
-    @objc func updateForDisplayingItems() {
+    func updateForDisplayingItems() {
         assert(PreferenceManager.shared.fastMode.currentBOOLValue)
         guard inspectableApp != nil else { return }
         let items = dataSource?.displayingFlatItems ?? []
@@ -95,7 +94,7 @@ final class StaticAsyncUpdateManager: NSObject {
     }
 
     /// Stops the running fetch.
-    @objc func endUpdating() {
+    func endUpdating() {
         guard ongoingRequest != nil else { return }
         #log(.default, "AsyncUpdate - endUpdating")
         // Completes the running details request synchronously, which runs
@@ -104,14 +103,13 @@ final class StaticAsyncUpdateManager: NSObject {
     }
 
     /// A method rather than a property: Swift callers use `isUpdating()`.
-    @objc func isUpdating() -> Bool {
+    func isUpdating() -> Bool {
         ongoingRequest != nil
     }
 
     /// Fetches the screenshots of `displayItem` (solo and group) and the
     /// group screenshots of its ancestors after an attribute was modified.
     /// Progress goes to `modifyingUpdates`.
-    @objc(updateAfterModifyingDisplayItem:)
     func updateAfterModifyingDisplayItem(_ displayItem: DisplayItem?) {
         guard let app = inspectableApp else { return }
         guard let displayItem else {
@@ -159,7 +157,6 @@ final class StaticAsyncUpdateManager: NSObject {
     }
 
     /// Fetches one item's screenshots and attributes again, not its sub items.
-    @objc(reloadSingleDisplayItem:)
     func reloadSingleDisplayItem(_ item: DisplayItem?) {
         let tasks = makeReloadSingleItemTasks(item)
         guard !tasks.isEmpty else { return }
@@ -167,7 +164,6 @@ final class StaticAsyncUpdateManager: NSObject {
     }
 
     /// Fetches an item and its sub items again, then their details.
-    @objc(reloadDisplayItemAndChildren:)
     func reloadDisplayItemAndChildren(_ rootItem: DisplayItem?) {
         // First the root item's basis, attributes and sub items.
         let tasks = makeReloadItemAndChildrenTasks(rootItem)
@@ -198,7 +194,7 @@ final class StaticAsyncUpdateManager: NSObject {
                 return nil
             }
             if item.doNotFetchScreenshotReason == .fetchScreenshotPermitted {
-                // Mirrors -appropriateScreenshot: a node showing its group
+                // Mirrors appropriateScreenshot(): a node showing its group
                 // screenshot must not have the solo one fetched first, or the
                 // preview waits on an image it will never display.
                 if item.isExpandable, item.isExpanded, item.hasPixelBearingSubitems() {
@@ -232,7 +228,7 @@ final class StaticAsyncUpdateManager: NSObject {
             if item.isUserCustom() {
                 return nil
             }
-            if item.optionalAppropriateScreenshot != nil {
+            if item.appropriateScreenshot() != nil {
                 // Has its image, and so its attributes too.
                 return nil
             }
diff --git a/LookInside/Static/StaticConstants.swift b/LookInside/Static/StaticConstants.swift
index ebbb793a..b43d6c57 100644
--- a/LookInside/Static/StaticConstants.swift
+++ b/LookInside/Static/StaticConstants.swift
@@ -23,7 +23,7 @@ let previewMaxScale: CGFloat = 1
 let previewMinZInterspace: CGFloat = 0
 let previewMaxZInterspace: CGFloat = 1
 
-@objc enum PreviewDimension: UInt {
+enum PreviewDimension: UInt {
     case dimension2D
     case dimension3D
 }
diff --git a/LookInside/Static/StaticHierarchyDataSource.swift b/LookInside/Static/StaticHierarchyDataSource.swift
index 440f8cf6..0154c300 100644
--- a/LookInside/Static/StaticHierarchyDataSource.swift
+++ b/LookInside/Static/StaticHierarchyDataSource.swift
@@ -11,12 +11,12 @@ import AppKit
 /// The data source of a live document: applies the details the update
 /// tasks deliver and starts those tasks.
 class StaticHierarchyDataSource: HierarchyDataSource {
-    @objc var appInfo: InspectedAppInfo? {
+    var appInfo: InspectedAppInfo? {
         storedAppInfo
     }
 
     /// The update manager of the owning window controller.
-    @objc weak var asyncUpdateManager: StaticAsyncUpdateManager?
+    weak var asyncUpdateManager: StaticAsyncUpdateManager?
 
     /// Sends each item whose frame changed. Also reaches `events()` as
     /// `.itemDidChangeFrame`.
@@ -40,7 +40,6 @@ class StaticHierarchyDataSource: HierarchyDataSource {
 
     // MARK: - Reload
 
-    @objc(reloadWithHierarchyInfo:keepState:)
     override func reload(with info: HierarchyInfo?, keepState: Bool) {
         super.reload(with: info, keepState: keepState)
 
@@ -75,7 +74,6 @@ class StaticHierarchyDataSource: HierarchyDataSource {
         }
     }
 
-    @objc(modifyWithDisplayItemDetail:)
     func modify(with detail: DisplayItemDetail?) {
         guard let detail else {
             return
diff --git a/LookInside/Static/StaticViewController.swift b/LookInside/Static/StaticViewController.swift
index a01c37c4..c3b63ba4 100644
--- a/LookInside/Static/StaticViewController.swift
+++ b/LookInside/Static/StaticViewController.swift
@@ -16,14 +16,14 @@ final class StaticViewController: BaseViewController, NSSplitViewDelegate {
     private static let ignoreFastModeTipsDefaultsKey = "IgnoreFastModeTips"
 
     /// The per-document data source, owned by StaticWindowController.
-    @objc private(set) weak var hierarchyDataSource: StaticHierarchyDataSource?
+    private(set) weak var hierarchyDataSource: StaticHierarchyDataSource?
 
     /// The per-document update manager, owned by StaticWindowController.
-    @objc private(set) weak var asyncUpdateManager: StaticAsyncUpdateManager?
+    private(set) weak var asyncUpdateManager: StaticAsyncUpdateManager?
 
-    @objc let viewsPreviewController: PreviewController
+    let viewsPreviewController: PreviewController
 
-    @objc let progressView = ProgressIndicatorView()
+    let progressView = ProgressIndicatorView()
 
     /// Shows or hides the console under the preview. Observable with KVO.
     @objc dynamic var showConsole = false {
@@ -43,8 +43,8 @@ final class StaticViewController: BaseViewController, NSSplitViewDelegate {
     private let fastModeTipView = TipsView()
     private let serverUpgradeTipView = TipsView()
 
-    /// Read with KVC by the DEBUG UI snapshots.
-    @objc let dashboardController: DashboardViewController
+    /// Read by the DEBUG UI snapshots.
+    let dashboardController: DashboardViewController
     private let hierarchyController: StaticHierarchyController
     private var consoleController: ConsoleViewController?
     private let measureController: MeasureController
@@ -58,7 +58,6 @@ final class StaticViewController: BaseViewController, NSSplitViewDelegate {
     /// children that read the data source and the update manager, so they
     /// are stored first, and the child controllers are created here, in the
     /// order buildContent() used to create them.
-    @objc(initWithHierarchyDataSource:asyncUpdateManager:)
     init(hierarchyDataSource: StaticHierarchyDataSource, asyncUpdateManager: StaticAsyncUpdateManager) {
         self.hierarchyDataSource = hierarchyDataSource
         self.asyncUpdateManager = asyncUpdateManager
@@ -409,7 +408,7 @@ final class StaticViewController: BaseViewController, NSSplitViewDelegate {
     }
 
     /// The hierarchy view of the tree on the left.
-    @objc func currentHierarchyView() -> HierarchyView? {
+    func currentHierarchyView() -> HierarchyView? {
         hierarchyController.hierarchyView
     }
 
@@ -560,7 +559,7 @@ final class StaticViewController: BaseViewController, NSSplitViewDelegate {
         let item = dataSource?.selectedItem
 
         let showsTooLargeTip = item != nil
-            && item?.optionalAppropriateScreenshot == nil
+            && item?.appropriateScreenshot() == nil
             && item?.doNotFetchScreenshotReason == .doNotFetchScreenshotForTooLarge
         if tooLargeToSyncScreenshotTipsView.isHidden != !showsTooLargeTip {
             tooLargeToSyncScreenshotTipsView.isHidden = !showsTooLargeTip
diff --git a/LookInside/Static/StaticWindowController.swift b/LookInside/Static/StaticWindowController.swift
index 368c7722..706be4d7 100644
--- a/LookInside/Static/StaticWindowController.swift
+++ b/LookInside/Static/StaticWindowController.swift
@@ -64,13 +64,13 @@ final class StaticWindowController: WindowController, NSToolbarDelegate, @precon
         case noResponse
     }
 
-    @objc let viewController: StaticViewController
+    let viewController: StaticViewController
 
     /// Per-window hierarchy data source.
-    @objc let hierarchyDataSource: StaticHierarchyDataSource
+    let hierarchyDataSource: StaticHierarchyDataSource
 
     /// Per-window async update manager.
-    @objc let asyncUpdateManager: StaticAsyncUpdateManager
+    let asyncUpdateManager: StaticAsyncUpdateManager
 
     /// Injected by the owning LiveDocument, which also swaps it when
     /// the app reconnects; every request uses it.
@@ -109,7 +109,6 @@ final class StaticWindowController: WindowController, NSToolbarDelegate, @precon
 
     /// Used by LiveDocument: the window, data source and update
     /// manager, all bound to `app`.
-    @objc(initWithInspectableApp:)
     init(inspectableApp app: InspectableApp?) {
         let screenSize = NSScreen.main?.frame.size ?? .zero
         let window = AppWindow(
@@ -265,7 +264,6 @@ final class StaticWindowController: WindowController, NSToolbarDelegate, @precon
         }
     }
 
-    @objc(popupAllInspectableAppsWithSource:)
     func popupAllInspectableApps(with source: MenuPopoverAppsListControllerEventSource) {
         let appItemView = toolbarItemsMap[NSToolbarItem.Identifier(toolbarIdentifierApp)]?.view
 
diff --git a/LookInside/SwiftUISupport/SwiftUIHierarchyDisplayMode.swift b/LookInside/SwiftUISupport/SwiftUIHierarchyDisplayMode.swift
index 3c17d54c..7bc98bca 100644
--- a/LookInside/SwiftUISupport/SwiftUIHierarchyDisplayMode.swift
+++ b/LookInside/SwiftUISupport/SwiftUIHierarchyDisplayMode.swift
@@ -5,7 +5,7 @@
 
 import AppKit
 
-@objc enum SwiftUIHierarchyDisplayMode: Int {
+enum SwiftUIHierarchyDisplayMode: Int {
     case verbose = 0
     case compact = 1
 }
diff --git a/LookInside/SwiftUISupport/SwiftUISupportGatekeeper.swift b/LookInside/SwiftUISupport/SwiftUISupportGatekeeper.swift
index 58c6d978..51e514f3 100644
--- a/LookInside/SwiftUISupport/SwiftUISupportGatekeeper.swift
+++ b/LookInside/SwiftUISupport/SwiftUISupportGatekeeper.swift
@@ -4,7 +4,7 @@ import LookInsideActivation
 import LookInsideActivationUI
 import FoundationToolbox
 
-@objc public enum SwiftUISupportActivationState: Int, CustomDebugStringConvertible {
+public enum SwiftUISupportActivationState: Int, CustomDebugStringConvertible {
     case unknown
     case notActivated
     case activated
@@ -179,7 +179,7 @@ public final class SwiftUISupportGatekeeper: NSObject {
         }
     }
 
-    @objc public class func sharedInstance() -> SwiftUISupportGatekeeper {
+    public class func sharedInstance() -> SwiftUISupportGatekeeper {
         shared
     }
 
@@ -207,7 +207,6 @@ public final class SwiftUISupportGatekeeper: NSObject {
 
     /// Stops the periodic re-evaluation when LookInside quits. The activation
     /// state on disk is left as it is.
-    @objc(shutdownRuntime)
     public func shutdownRuntime() {
         runtime.stopMonitoring()
     }
@@ -242,7 +241,6 @@ public final class SwiftUISupportGatekeeper: NSObject {
 
     /// Callers include reloads and connection flows, so the alert for a
     /// warning or a block is a sheet on `window` and never a modal loop.
-    @objc(allowProtectedFeatureAccessForWindow:)
     public func allowProtectedFeatureAccess(for window: NSWindow?) -> Bool {
         let decision = accessDecisionForSynchronousCaller()
         switch decision.decision {
@@ -262,7 +260,6 @@ public final class SwiftUISupportGatekeeper: NSObject {
         }
     }
 
-    @objc(canUseProtectedFeatureWithoutPrompt)
     public func canUseProtectedFeatureWithoutPrompt() -> Bool {
         accessDecisionForSynchronousCaller().grantsAccess
     }
@@ -314,20 +311,17 @@ public final class SwiftUISupportGatekeeper: NSObject {
     /// wait ends. Every handshake attempt, including a retry with a fresh
     /// challenge, asks first. A request on a channel without a handshake
     /// still runs; the Server then withholds the Pro features.
-    @objc(shouldStartLicenseHandshakeOnChannel:)
     public func shouldStartLicenseHandshake(onChannel channelID: String) -> Bool {
         runtime.allowsLicenseHandshake(onChannel: channelID)
     }
 
     /// Records that the Server on `channelID` rejected the 221 or sent a
     /// malformed 220, so the handshake is not repeated on that channel.
-    @objc(noteLicenseHandshakeFailedOnChannel:)
     public func noteLicenseHandshakeFailed(onChannel channelID: String) {
         runtime.noteLicenseHandshakeFailed(onChannel: channelID)
     }
 
     /// Forgets `channelID` after it disconnected.
-    @objc(licenseHandshakeChannelDidEnd:)
     public func licenseHandshakeChannelDidEnd(_ channelID: String) {
         runtime.noteLicenseHandshakeChannelEnded(channelID)
     }
@@ -341,7 +335,6 @@ public final class SwiftUISupportGatekeeper: NSObject {
     /// the key back or signing fails.
     ///
     /// Blocks until the signature is ready; call it off the main thread.
-    @objc(signChallengeWithNonce:serverInstanceID:signature:intermediateCertDER:udid:error:)
     public func signChallenge(
         nonce: Data,
         serverInstanceID: String,
@@ -365,7 +358,6 @@ public final class SwiftUISupportGatekeeper: NSObject {
     /// on that channel. `keyUseDuration`, when given, receives how long the
     /// key took in its turn (the keychain's time, including a prompt),
     /// without the time this call waited behind other uses of the key.
-    @objc(signChallengeWithNonce:serverInstanceID:channelID:signature:intermediateCertDER:udid:keyUseDuration:error:)
     public func signChallenge(
         nonce: Data,
         serverInstanceID: String,
@@ -397,14 +389,12 @@ public final class SwiftUISupportGatekeeper: NSObject {
 
     // MARK: - Windows
 
-    @objc(showActivationWindow)
     public func showActivationWindow() {
         onMain { coordinator in
             Task { await coordinator.showActivationWindow() }
         }
     }
 
-    @objc(showLicenseWindow)
     public func showLicenseWindow() {
         onMain { coordinator in
             Task { await coordinator.showLicenseWindow() }
@@ -413,7 +403,6 @@ public final class SwiftUISupportGatekeeper: NSObject {
 
     /// Fetches the license status from the activation service, shows it in
     /// the license window and reports the result in an alert.
-    @objc(refreshLicenseStatus)
     public func refreshLicenseStatus() {
         let shouldStart: Bool = stateLock.withLock {
             guard !licenseStatusRefreshInFlight else { return false }
@@ -458,13 +447,11 @@ public final class SwiftUISupportGatekeeper: NSObject {
 
     // MARK: - SwiftUI detection prompt
 
-    @objc(promptForDetectedSwiftUISupportIfNeededForWindow:)
     public func promptForDetectedSwiftUISupportIfNeeded(window: NSWindow?) {
         noteDetectedSwiftUISupport()
         promptForPendingDetectedSwiftUISupportIfNeeded(window: window)
     }
 
-    @objc(noteDetectedSwiftUISupport)
     public func noteDetectedSwiftUISupport() {
         guard activationState != .activated else { return }
 
@@ -474,7 +461,6 @@ public final class SwiftUISupportGatekeeper: NSObject {
         }
     }
 
-    @objc(promptForPendingDetectedSwiftUISupportIfNeededForWindow:)
     public func promptForPendingDetectedSwiftUISupportIfNeeded(window: NSWindow?) {
         guard activationState != .activated else { return }
 
@@ -613,7 +599,6 @@ private final class SwiftUISupportDecisionBox: @unchecked Sendable {
         /// DEBUG end-to-end hook (DebugE2EDump.swift): creates the license key
         /// in the test file keychain and returns a certificate request for
         /// it. See `ActivationRuntime.debugMakeTestKeyCertificateSigningRequestPEM`.
-        @objc(debugMakeTestKeyCertificateSigningRequestPEMWithCommonName:error:)
         func debugMakeTestKeyCertificateSigningRequestPEM(commonName: String) throws -> String {
             try runtime.debugMakeTestKeyCertificateSigningRequestPEM(commonName: commonName)
         }
@@ -622,7 +607,6 @@ private final class SwiftUISupportDecisionBox: @unchecked Sendable {
         /// other apps there, so its window never becomes key. The dump calls
         /// this once a Host window is visible, the condition this gatekeeper
         /// itself accepts when it is created after the first window.
-        @objc(debugNoteFirstWindowShown)
         func debugNoteFirstWindowShown() {
             runtime.noteFirstWindowShown()
         }
diff --git a/LookInside/Toolbar/MenuPopoverAppsListController.swift b/LookInside/Toolbar/MenuPopoverAppsListController.swift
index 7e3d5e8c..6b03c893 100644
--- a/LookInside/Toolbar/MenuPopoverAppsListController.swift
+++ b/LookInside/Toolbar/MenuPopoverAppsListController.swift
@@ -20,9 +20,8 @@ final class MenuPopoverAppsListController: BaseViewController {
     private var titleLabel: TextLabel?
     private var subtitleLabel: TextLabel?
 
-    @objc var didSelectApp: ((InspectableApp) -> Void)?
+    var didSelectApp: ((InspectableApp) -> Void)?
 
-    @objc(initWithApps:source:)
     init(apps: [InspectableApp]?, source: MenuPopoverAppsListControllerEventSource) {
         // The apps scan sends nil when no port is connected.
         let apps = apps ?? []
@@ -93,7 +92,7 @@ final class MenuPopoverAppsListController: BaseViewController {
         didSelectApp?(app)
     }
 
-    @objc func bestSize() -> NSSize {
+    func bestSize() -> NSSize {
         guard !appViews.isEmpty else {
             return NSSize(width: 245, height: 80)
         }
diff --git a/LookInside/Toolbar/MenuPopoverSettingController.swift b/LookInside/Toolbar/MenuPopoverSettingController.swift
index 632203eb..832aaba4 100644
--- a/LookInside/Toolbar/MenuPopoverSettingController.swift
+++ b/LookInside/Toolbar/MenuPopoverSettingController.swift
@@ -24,7 +24,6 @@ final class MenuPopoverSettingController: BaseViewController {
 
     /// `isMacTarget` describes the app being inspected, not the host. It decides whether the
     /// copy talks about `NSView` or `UIView`.
-    @objc(initWithPreferenceManager:isMacTarget:)
     init(preferenceManager manager: PreferenceManager, isMacTarget: Bool) {
         self.manager = manager
         super.init(containerView: nil)
diff --git a/LookInside/Toolbar/ToolbarRules.swift b/LookInside/Toolbar/ToolbarRules.swift
index a7f344ac..a41b23e0 100644
--- a/LookInside/Toolbar/ToolbarRules.swift
+++ b/LookInside/Toolbar/ToolbarRules.swift
@@ -27,7 +27,7 @@ let toolbarIdentifierSwiftUIMode = "20"
 let toolbarIdentifierGestureDebug = "21"
 
 /// What opened the apps popover.
-@objc enum MenuPopoverAppsListControllerEventSource: Int {
+enum MenuPopoverAppsListControllerEventSource: Int {
     case reloadButton
     case noConnectionTips
     case appButton
diff --git a/LookInside/Toolbar/WindowToolbarAppButton.swift b/LookInside/Toolbar/WindowToolbarAppButton.swift
index 82184782..58b480a8 100644
--- a/LookInside/Toolbar/WindowToolbarAppButton.swift
+++ b/LookInside/Toolbar/WindowToolbarAppButton.swift
@@ -55,7 +55,7 @@ final class WindowToolbarAppButton: NSButton {
         TwoColors(colorInLightMode: NSColor(red: 65 / 255.0, green: 65 / 255.0, blue: 65 / 255.0, alpha: 1), colorInDarkMode: .labelColor)
     }
 
-    @objc var appInfo: InspectedAppInfo? {
+    var appInfo: InspectedAppInfo? {
         didSet { appInfoDidChange() }
     }
 
diff --git a/LookInside/Toolbar/WindowToolbarHelper.swift b/LookInside/Toolbar/WindowToolbarHelper.swift
index 6e347975..783b10c5 100644
--- a/LookInside/Toolbar/WindowToolbarHelper.swift
+++ b/LookInside/Toolbar/WindowToolbarHelper.swift
@@ -15,7 +15,6 @@ import AppKit
 /// others itself: Reload, App, Setting, Console, Add, Remove and Message.
 @MainActor
 final class WindowToolbarHelper: NSObject {
-    @objc(sharedInstance)
     static let shared = WindowToolbarHelper()
 
     override private init() {
@@ -24,7 +23,6 @@ final class WindowToolbarHelper: NSObject {
 
     /// The item for `identifier`. Use `makeAppInReadModeItem(with:)` for the
     /// reader's app item.
-    @objc(makeToolBarItemWithIdentifier:preferenceManager:)
     func makeToolBarItem(identifier: String, preferenceManager manager: PreferenceManager) -> NSToolbarItem? {
         assert(identifier != toolbarIdentifierAppInReadMode, "Use makeAppInReadModeItemWithAppInfo:")
 
@@ -138,7 +136,6 @@ final class WindowToolbarHelper: NSObject {
     }
 
     /// The reader's app item, showing `appInfo`.
-    @objc(makeAppInReadModeItemWithAppInfo:)
     func makeAppInReadModeItem(with appInfo: InspectedAppInfo?) -> NSToolbarItem {
         let button = WindowToolbarAppButton()
         button.bezelStyle = .texturedRounded
diff --git a/Scripts/check-host-release-clean.sh b/Scripts/check-host-release-clean.sh
index 5f0f0a28..1b8f9255 100755
--- a/Scripts/check-host-release-clean.sh
+++ b/Scripts/check-host-release-clean.sh
@@ -11,17 +11,17 @@
 # which reads LOOKINSIDE_ACTIVATION_API_BASE_URL (a different activation
 # service) and LOOKINSIDE_ACTIVATION_TEST_ROOT_ID /
 # LOOKINSIDE_ACTIVATION_TEST_ROOT_PUBLIC_KEY_PEM (an extra trusted root) from
-# the environment, and the end-to-end dump (DebugE2E/: LKDebugE2EDump,
-# LookinSnapshotNormalizer) reads LOOKINSIDE_DEBUG_E2E_*, and the UI
-# snapshots (DebugE2E/: LKDebugUISnapshots, LKDebugWindowImage) read
+# the environment, and the end-to-end dump (DebugE2E/: DebugE2EDump,
+# SnapshotNormalizer) reads LOOKINSIDE_DEBUG_E2E_*, and the UI
+# snapshots (DebugE2E/: DebugUISnapshots, DebugWindowImage) read
 # LOOKINSIDE_DEBUG_UI_SNAPSHOT_*. A Release build
 # compiles them out; this check proves it on the shipped bundle.
 #
 # A path fails when any of the following holds:
 #   - a file in it contains ActivationDebugOverrides, any
 #     LOOKINSIDE_ACTIVATION_*, LOOKINSIDE_DEBUG_E2E_* or
-#     LOOKINSIDE_DEBUG_UI_SNAPSHOT_* string, the LKDebugE2EDump,
-#     LKDebugUISnapshots, LKDebugWindowImage or LookinSnapshotNormalizer
+#     LOOKINSIDE_DEBUG_UI_SNAPSHOT_* string, the DebugE2EDump,
+#     DebugUISnapshots, DebugWindowImage or SnapshotNormalizer Swift type
 #     name, or a LookinServer
 #     license test-hook
 #     marker (test_setOverrideRootCertificateDER, sLKSTestOverrideRoot,
@@ -34,7 +34,7 @@
 #   - release mode only: it holds no app bundle, or an outermost app bundle's
 #     Contents/Info.plist has an empty or missing SUPublicEDKey or SUFeedURL.
 #     Only the release workflows inject SPARKLE_PUBLIC_ED_KEY; a build without
-#     it silently skips the updater (LKAppMenuManager), so a release must
+#     it silently skips the updater (AppMenuManager), so a release must
 #     never ship one.
 # Release mode (--release-strict) is the default. --local-build skips only
 # the Sparkle check, for local Release builds that have no updater key.
@@ -84,8 +84,11 @@ mkdir -p "$SCRATCH_PARENT" || exit 2
 WORK_DIR="$(mktemp -d "$SCRATCH_PARENT/check-host-release-clean.XXXXXX")" || exit 2
 trap 'rm -rf "$WORK_DIR"' EXIT
 
-MARKERS_RE='ActivationDebugOverrides|LOOKINSIDE_ACTIVATION_[A-Z0-9_]+|LOOKINSIDE_DEBUG_E2E_[A-Z0-9_]+|LOOKINSIDE_DEBUG_UI_SNAPSHOT_[A-Z0-9_]+|LKDebugE2EDump|LKDebugUISnapshots|LKDebugWindowImage|LookinSnapshotNormalizer|test_setOverrideRootCertificateDER|sLKSTestOverrideRoot|LOOKINSIDE_ENABLE_LICENSE_TEST_HOOKS'
-SYMBOL_RE='ActivationDebugOverrides|LKDebugE2EDump|LKDebugUISnapshots|LKDebugWindowImage|LookinSnapshotNormalizer'
+# The DebugE2E types have no Objective-C names, so they are matched by their
+# Swift type names. Scripts/test-check-host-release-clean.sh fails when a type
+# there is renamed and these lists are not.
+MARKERS_RE='ActivationDebugOverrides|LOOKINSIDE_ACTIVATION_[A-Z0-9_]+|LOOKINSIDE_DEBUG_E2E_[A-Z0-9_]+|LOOKINSIDE_DEBUG_UI_SNAPSHOT_[A-Z0-9_]+|DebugE2EDump|DebugUISnapshots|DebugWindowImage|SnapshotNormalizer|test_setOverrideRootCertificateDER|sLKSTestOverrideRoot|LOOKINSIDE_ENABLE_LICENSE_TEST_HOOKS'
+SYMBOL_RE='ActivationDebugOverrides|DebugE2EDump|DebugUISnapshots|DebugWindowImage|SnapshotNormalizer'
 
 findings=0
 usage_errors=0
diff --git a/Scripts/test-check-host-release-clean.sh b/Scripts/test-check-host-release-clean.sh
new file mode 100755
index 00000000..38c28db8
--- /dev/null
+++ b/Scripts/test-check-host-release-clean.sh
@@ -0,0 +1,119 @@
+#!/bin/bash
+# Tests check-host-release-clean.sh with throwaway app bundles built for this
+# run only.
+#
+# The DEBUG-only end-to-end dump and UI snapshots in LookInside/DebugE2E/ are
+# Swift types without Objective-C names, so the check recognises them by their
+# Swift type names. For every file there, a bundle whose binary declares that
+# file's file-scope types must fail the check, with its symbol table and
+# without it. Renaming one of those types without updating the check fails
+# this test. A bundle declaring ordinary host types must pass.
+
+set -euo pipefail
+
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+check="$script_dir/check-host-release-clean.sh"
+debug_sources="$script_dir/../LookInside/DebugE2E"
+
+work_dir="$(mktemp -d "${TMPDIR:-/tmp}/check-host-release-clean-test.XXXXXX")"
+trap 'rm -rf "$work_dir"' EXIT
+
+failures=0
+
+# The file-scope types a DebugE2E file declares. Its code sits inside
+# `#if DEBUG`, one level in, so nested types are indented further.
+file_scope_types() {
+	sed -n -E 's/^( {4})?((public|internal|fileprivate|private) )?(final )?(class|enum|struct|actor) ([A-Za-z_][A-Za-z0-9_]*).*/\6/p' "$1" |
+		grep -v -x -E 'func|var|let|override|static|final|public|internal|fileprivate|private' || true
+}
+
+# Builds <bundle>/LookInside.app around a binary of module LookInside, the
+# host's module name, that declares the given types and uses them.
+make_bundle() {
+	local bundle="$1"
+	shift
+	local source="$work_dir/$bundle.swift"
+	local executable="$work_dir/$bundle/LookInside.app/Contents/MacOS/LookInside"
+	mkdir -p "$(dirname "$executable")"
+	{
+		local type_name
+		for type_name in "$@"; do
+			echo "final class $type_name {}"
+		done
+		echo "print([$(printf '%s.self, ' "$@")] as [AnyObject.Type])"
+	} >"$source"
+	swiftc -module-name LookInside -module-cache-path "$work_dir/ModuleCache" "$source" -o "$executable"
+}
+
+# Copies a bundle and strips its binary's symbol table, as a Release build does.
+make_stripped_copy() {
+	local bundle="$1" copy="$2"
+	cp -R "$work_dir/$bundle" "$work_dir/$copy"
+	strip "$work_dir/$copy/LookInside.app/Contents/MacOS/LookInside" 2>/dev/null
+}
+
+run_check() {
+	local status=0
+	bash "$check" --local-build "$work_dir/$1" >"$work_dir/output" 2>&1 || status=$?
+	return "$status"
+}
+
+expect_rejected() {
+	local label="$1" bundle="$2"
+	local status=0
+	run_check "$bundle" || status=$?
+	if [ "$status" -ne 1 ]; then
+		echo "FAIL ($label): expected exit status 1 for DEBUG-only types, got $status" >&2
+		cat "$work_dir/output" >&2
+		failures=$((failures + 1))
+		return
+	fi
+	echo "ok - $label"
+}
+
+expect_clean() {
+	local label="$1" bundle="$2"
+	local status=0
+	run_check "$bundle" || status=$?
+	if [ "$status" -ne 0 ]; then
+		echo "FAIL ($label): expected exit status 0, got $status" >&2
+		cat "$work_dir/output" >&2
+		failures=$((failures + 1))
+		return
+	fi
+	echo "ok - $label"
+}
+
+checked_files=0
+for source_file in "$debug_sources"/*.swift; do
+	file_name="$(basename "$source_file" .swift)"
+	types=()
+	while IFS= read -r type_name; do
+		types+=("$type_name")
+	done < <(file_scope_types "$source_file")
+	if [ "${#types[@]}" -eq 0 ]; then
+		echo "skip - $file_name.swift declares no file-scope type"
+		continue
+	fi
+	make_bundle "$file_name" "${types[@]}"
+	expect_rejected "$file_name.swift (${types[*]})" "$file_name"
+	make_stripped_copy "$file_name" "$file_name-stripped"
+	expect_rejected "$file_name.swift, stripped (${types[*]})" "$file_name-stripped"
+	checked_files=$((checked_files + 1))
+done
+
+if [ "$checked_files" -eq 0 ]; then
+	echo "FAIL: found no DebugE2E file to build a bundle from in $debug_sources" >&2
+	failures=$((failures + 1))
+fi
+
+make_bundle "Ordinary" AppDelegate HierarchyDataSource StaticWindowController
+expect_clean "ordinary host types" "Ordinary"
+make_stripped_copy "Ordinary" "Ordinary-stripped"
+expect_clean "ordinary host types, stripped" "Ordinary-stripped"
+
+if [ "$failures" -gt 0 ]; then
+	echo "$failures check-host-release-clean test(s) failed" >&2
+	exit 1
+fi
+echo "check-host-release-clean tests passed"
diff --git a/Scripts/test-mcp-bridge.sh b/Scripts/test-mcp-bridge.sh
index 5f290bd7..87acb400 100755
--- a/Scripts/test-mcp-bridge.sh
+++ b/Scripts/test-mcp-bridge.sh
@@ -28,7 +28,7 @@ swiftc -parse-as-library "$SEARCH_QUERY" "$SEARCH_QUERY_TEST" -o "$TMPDIR/search
 "$TMPDIR/search-query-test"
 
 # The identifier list needs MCPBridgeFrame.swift alongside it for
-# LKMCPBridgeJSONValue; that file is Foundation-only, so it compiles here.
+# MCPBridgeJSONValue; that file is Foundation-only, so it compiles here.
 FRAME="$ROOT/LookInside/MCPBridge/MCPBridgeFrame.swift"
 OBJECT_IDENTIFIER_LIST="$ROOT/LookInside/MCPBridge/MCPBridgeObjectIdentifierList.swift"
 OBJECT_IDENTIFIER_LIST_TEST="$ROOT/Tests/MCPBridge/MCPBridgeObjectIdentifierListTests.swift"