docs: simplify CODEGRAPH validation commands

Ariver

2026-06-29 5816f189ed5fb0bb8bedef8200cee198164fcce2

 C1.source/Sources/Aligner/QuickSwitchSessionController.swift

@@ -15,9 +15,12 @@
    private let snapshotLoader: any QuickSwitchSnapshotLoading
    private let screenshotProvider: any ScreenshotProviderProtocol
    private let windowActivationService: any WindowActivationServiceProtocol
    private let spaceActivationService: any SpaceActivationServiceProtocol
    private let windowCloseService: any WindowCloseServiceProtocol
    private let systemCriticalWindowDetector: any SystemCriticalWindowDetecting
    private let disableScreenshotRefresh: Bool
    private var waterfallViewMode: QuickSwitchWaterfallViewMode
    private var theme: ThemePreference
    private var closeConfirmationRequired: Bool
    private let onCloseConfirmationDisabled: (() -> Void)?
    private let debugOverlayWidth: CGFloat?
@@ -30,7 +33,13 @@
        debugOverlayWidth: debugOverlayWidth
    )
    private var currentSnapshot: QuickSwitchSnapshot?
    private var sourceViewModel: QuickSwitchViewModel?
    private var currentViewModel: QuickSwitchViewModel?
    private var lockedSpaceFilterID: UInt64?
    private var selectionBeforeSpaceFilter: QuickSwitchSelection?
    private var lastSpaceFilterAction: String?
    private var pendingLockedSpaceUnlockSpaceID: UInt64?
    private var pendingLockedSpaceUnlockTask: Task<Void, Never>?
    private var lastSnapshotError: String?
    private var snapshotTask: Task<Void, Never>?
    private var screenshotTask: Task<Void, Never>?
@@ -48,6 +57,12 @@
    private var lastActivationWindowID: UInt32?
    private var lastActivationResult: WindowActivationResult?
    private var lastActivationError: String?
    private var lastActivationDurationMilliseconds: Double?
    private var lastSpaceActivationSpaceID: UInt64?
    private var lastSpaceActivationDidRequestFocus: Bool?
    private var lastSpaceActivationDisplayIdentifier: String?
    private var lastSpaceActivationPreviousCurrentSpaceID: UInt64?
    private var lastSpaceActivationError: String?
    private var lastCloseTargetKind: String?
    private var lastCloseAppGroupIndex: Int?
    private var lastCloseAppName: String?
@@ -56,6 +71,7 @@
    private var lastCloseError: String?
    private var pendingCloseVerification: PendingCloseVerification?
    private var suppressedCloseTargets: [SuppressedCloseTarget] = []
    private var suppressedActivationWindowIDs = Set<UInt32>()
    private var lastDismissReason: DismissReason?
    private var lastSystemCriticalAction: String?
    private var lastSystemCriticalMonitorSource: String?
@@ -73,6 +89,8 @@
    private var lifecycleResidualOverlayWindows = 0
    private var lifecycleResidualVisibleOverlayWindows = 0
    var onSnapshotUpdated: (() -> Void)?
    var onToggleWaterfallViewMode: (() -> Void)?
    var onToggleTheme: (() -> Void)?

    private struct PendingCloseVerification {
        let request: QuickSwitchCloseRequest
@@ -102,11 +120,14 @@
        windowActivationService: any WindowActivationServiceProtocol = CGWindowAXWindowService(
            spaceIDsByWindowIDProvider: { _ in [:] }
        ),
        spaceActivationService: any SpaceActivationServiceProtocol = PrivateSpaceActivationService(),
        windowCloseService: any WindowCloseServiceProtocol = CGWindowAXWindowService(
            spaceIDsByWindowIDProvider: { _ in [:] }
        ),
        systemCriticalWindowDetector: any SystemCriticalWindowDetecting = CGWindowSystemCriticalWindowDetector(),
        disableScreenshotRefresh: Bool = false,
        waterfallViewMode: QuickSwitchWaterfallViewMode = .verticalColumns,
        theme: ThemePreference = .light,
        closeConfirmationRequired: Bool = true,
        onCloseConfirmationDisabled: (() -> Void)? = nil,
        debugHoveredAppGroupIndex: Int? = nil,
@@ -118,9 +139,12 @@
        self.snapshotLoader = snapshotLoader
        self.screenshotProvider = screenshotProvider
        self.windowActivationService = windowActivationService
        self.spaceActivationService = spaceActivationService
        self.windowCloseService = windowCloseService
        self.systemCriticalWindowDetector = systemCriticalWindowDetector
        self.disableScreenshotRefresh = disableScreenshotRefresh
        self.waterfallViewMode = waterfallViewMode
        self.theme = theme
        self.closeConfirmationRequired = closeConfirmationRequired
        self.onCloseConfirmationDisabled = onCloseConfirmationDisabled
        self.debugOverlayWidth = debugOverlayWidth
@@ -151,6 +175,12 @@
        lastActivationWindowID = nil
        lastActivationResult = nil
        lastActivationError = nil
        lastActivationDurationMilliseconds = nil
        lastSpaceActivationSpaceID = nil
        lastSpaceActivationDidRequestFocus = nil
        lastSpaceActivationDisplayIdentifier = nil
        lastSpaceActivationPreviousCurrentSpaceID = nil
        lastSpaceActivationError = nil
        lastCloseTargetKind = nil
        lastCloseAppGroupIndex = nil
        lastCloseAppName = nil
@@ -159,6 +189,11 @@
        lastCloseError = nil
        pendingCloseVerification = nil
        suppressedCloseTargets = []
        suppressedActivationWindowIDs = []
        cancelPendingLockedSpaceUnlock()
        lockedSpaceFilterID = nil
        selectionBeforeSpaceFilter = nil
        lastSpaceFilterAction = nil
        lastDismissReason = nil
        lastSystemCriticalAction = nil
        lastSystemCriticalMonitorSource = nil
@@ -180,6 +215,19 @@
        view.onCommitSelection = { [weak self] selection, source in
            self?.commitSelection(selection, source: source)
        }
        view.onSpaceLaneClick = { [weak self] spaceID, clickCount in
            self?.handleSpaceLaneClick(spaceID, clickCount: clickCount)
        }
        view.onBackgroundClick = { [weak self] in
            self?.handleBackgroundClick() ?? false
        }
        view.onToggleWaterfallViewMode = { [weak self] in
            self?.onToggleWaterfallViewMode?()
        }
        view.onToggleTheme = { [weak self] in
            self?.onToggleTheme?()
        }
        view.setSuppressEventInput(!debugMouseSequence.isEmpty || !debugKeySequence.isEmpty)
        view.onRequestClose = { [weak self] request in
            self?.requestClose(request)
        }
@@ -189,6 +237,8 @@
            self.onCloseConfirmationDisabled?()
        }
        view.setCloseConfirmationRequired(closeConfirmationRequired)
        view.setWaterfallViewMode(waterfallViewMode)
        view.setTheme(theme)
        view.apply(viewModel: nil)
        view.beginPerformanceFirstFrameMeasurement()
        coordinator.openQuickSwitch()
@@ -218,6 +268,7 @@
        snapshotTask = nil
        screenshotTask?.cancel()
        screenshotTask = nil
        cancelPendingLockedSpaceUnlock()
        pendingCloseVerification = nil
        view.clearCloseFeedback()
        invalidateSystemCriticalMonitoring()
@@ -241,7 +292,58 @@

    func retriggerFromShortcut() {
        DevelopmentDiagnostics.log("quickSwitch.session.retriggerFromShortcut")
        show()
        guard isVisible else {
            show()
            return
        }

        guard currentViewModel != nil else {
            DevelopmentDiagnostics.log("quickSwitch.session.retriggerFromShortcut.noSnapshot", [
                "action": "fallbackShow"
            ])
            show()
            return
        }

        let didCycle = view.hoverNextAppGroupIndex()
        DevelopmentDiagnostics.log("quickSwitch.session.retriggerFromShortcut.hoverApp", [
            "didCycle": didCycle
        ])

        if !didCycle {
            show()
        }
    }

    func setWaterfallViewMode(_ mode: QuickSwitchWaterfallViewMode) {
        guard waterfallViewMode != mode else { return }

        waterfallViewMode = mode
        DevelopmentDiagnostics.log("quickSwitch.session.waterfallViewModeChanged", [
            "mode": mode.rawValue,
            "visible": isVisible,
            "hasViewModel": currentViewModel != nil
        ])

        view.setWaterfallViewMode(mode)
        if isVisible, let currentViewModel {
            view.applyProjected(viewModel: currentViewModel)
        }
        onSnapshotUpdated?()
    }

    func setTheme(_ theme: ThemePreference) {
        guard self.theme != theme else { return }

        self.theme = theme
        DevelopmentDiagnostics.log("quickSwitch.session.themeChanged", [
            "theme": theme.rawValue,
            "visible": isVisible,
            "hasViewModel": currentViewModel != nil
        ])

        view.setTheme(theme)
        onSnapshotUpdated?()
    }

    func reportDictionary() -> [String: Any] {
@@ -264,6 +366,9 @@
            "initialSelectionWindowID": currentViewModel?.initialSelection?.windowID ?? NSNull(),
            "appShelfNames": currentViewModel?.appShelf.map(\.app.name) ?? [],
            "spaceLabels": currentViewModel?.displays.flatMap { $0.spaces.map(\.label) } ?? [],
            "spaceFilterLockedSpaceID": lockedSpaceFilterID ?? NSNull(),
            "spaceFilterActive": lockedSpaceFilterID != nil,
            "lastSpaceFilterAction": lastSpaceFilterAction ?? NSNull(),
            "overlayOpenElapsedMilliseconds": overlayOpenElapsedMilliseconds ?? NSNull(),
            "snapshotStartElapsedMilliseconds": snapshotStartElapsedMilliseconds ?? NSNull(),
            "snapshotDurationMilliseconds": snapshotDurationMilliseconds ?? NSNull(),
@@ -275,6 +380,12 @@
            "lastActivationWindowID": lastActivationWindowID ?? NSNull(),
            "lastActivationResult": lastActivationResult.map(Self.activationResultString) ?? NSNull(),
            "lastActivationError": lastActivationError ?? NSNull(),
            "lastActivationDurationMilliseconds": lastActivationDurationMilliseconds ?? NSNull(),
            "lastSpaceActivationSpaceID": lastSpaceActivationSpaceID ?? NSNull(),
            "lastSpaceActivationDidRequestFocus": lastSpaceActivationDidRequestFocus ?? NSNull(),
            "lastSpaceActivationDisplayIdentifier": lastSpaceActivationDisplayIdentifier ?? NSNull(),
            "lastSpaceActivationPreviousCurrentSpaceID": lastSpaceActivationPreviousCurrentSpaceID ?? NSNull(),
            "lastSpaceActivationError": lastSpaceActivationError ?? NSNull(),
            "lastCloseTargetKind": lastCloseTargetKind ?? NSNull(),
            "lastCloseAppGroupIndex": lastCloseAppGroupIndex ?? NSNull(),
            "lastCloseAppName": lastCloseAppName ?? NSNull(),
@@ -282,6 +393,8 @@
            "lastCloseResult": lastCloseResult.map(Self.closeResultString) ?? NSNull(),
            "lastCloseError": lastCloseError ?? NSNull(),
            "suppressedCloseTargetCount": suppressedCloseTargets.count,
            "suppressedActivationWindowCount": suppressedActivationWindowIDs.count,
            "suppressedActivationWindowIDs": Array(suppressedActivationWindowIDs).sorted(),
            "lastDismissReason": lastDismissReason.map(Self.dismissReasonString) ?? NSNull(),
            "overlayLevel": Int(coordinator.currentLevel),
            "overlayMainMenuLevel": Int(CGWindowLevelForKey(.mainMenuWindow)),
@@ -375,6 +488,7 @@

    private func clearSnapshotState() {
        currentSnapshot = nil
        sourceViewModel = nil
        currentViewModel = nil
        lastSnapshotError = nil
    }
@@ -446,7 +560,11 @@
        onSnapshotUpdated?()
    }

    private func commitSelection(_ selection: QuickSwitchSelection, source: QuickSwitchCommitSource) {
    private func commitSelection(
        _ selection: QuickSwitchSelection,
        source: QuickSwitchCommitSource,
        in viewModel: QuickSwitchViewModel? = nil
    ) {
        DevelopmentDiagnostics.log("quickSwitch.activation.commit.start", [
            "source": source.rawValue,
            "appGroupIndex": selection.appGroupIndex,
@@ -457,9 +575,11 @@
        lastCommitSource = source
        lastActivationWindowID = selection.windowID
        lastActivationError = nil
        lastActivationDurationMilliseconds = nil

        guard let window = window(for: selection) else {
        guard let window = window(for: selection, in: viewModel ?? currentViewModel) else {
            lastActivationResult = .windowNotFound
            suppressActivationWindowID(selection.windowID, reason: "selectionMissing")
            DevelopmentDiagnostics.log("quickSwitch.activation.commit.windowNotFound", [
                "source": source.rawValue,
                "appGroupIndex": selection.appGroupIndex,
@@ -476,8 +596,10 @@
        ])
        hide(reason: .userClosed)

        let activationStartedAt = CACurrentMediaTime()
        do {
            lastActivationResult = try windowActivationService.activate(window: window)
            lastActivationDurationMilliseconds = (CACurrentMediaTime() - activationStartedAt) * 1_000
            DevelopmentDiagnostics.log("quickSwitch.activation.commit.result", [
                "source": source.rawValue,
                "windowID": window.id,
@@ -486,9 +608,11 @@
                "titleHash": DevelopmentDiagnostics.stableFingerprint(window.title),
                "titleLength": window.title.count,
                "titleIsEmpty": window.title.isEmpty,
                "result": lastActivationResult.map(Self.activationResultString)
                "result": lastActivationResult.map(Self.activationResultString),
                "durationMilliseconds": lastActivationDurationMilliseconds
            ])
        } catch {
            lastActivationDurationMilliseconds = (CACurrentMediaTime() - activationStartedAt) * 1_000
            let errorSummary = DevelopmentDiagnostics.errorSummaryString(error)
            lastActivationResult = .failed(errorSummary)
            lastActivationError = errorSummary
@@ -498,10 +622,15 @@
                "appName": window.app.name,
                "titleHash": DevelopmentDiagnostics.stableFingerprint(window.title),
                "titleLength": window.title.count,
                "titleIsEmpty": window.title.isEmpty
                "titleIsEmpty": window.title.isEmpty,
                "durationMilliseconds": lastActivationDurationMilliseconds
            ]
            DevelopmentDiagnostics.errorSummaryFields(error).forEach { fields[$0.key] = $0.value }
            DevelopmentDiagnostics.log("quickSwitch.activation.commit.error", fields)
        }

        if shouldSuppressAfterActivationResult(lastActivationResult) {
            suppressActivationWindowID(window.id, reason: lastActivationResult.map(Self.activationResultString) ?? "unknown")
        }

        if shouldCloseAfterActivation(lastActivationResult) {
@@ -513,6 +642,224 @@
                "result": lastActivationResult.map(Self.activationResultString)
            ])
        }
        onSnapshotUpdated?()
    }

    private func handleSpaceLaneClick(_ spaceID: UInt64, clickCount: Int) {
        if clickCount >= 2 {
            if pendingLockedSpaceUnlockSpaceID == spaceID || lockedSpaceFilterID == spaceID {
                cancelPendingLockedSpaceUnlock()
                activateLockedSpace(spaceID)
            } else {
                DevelopmentDiagnostics.log("quickSwitch.spaceFilter.doubleClick.ignored", [
                    "spaceID": spaceID,
                    "lockedSpaceID": lockedSpaceFilterID ?? NSNull(),
                    "pendingUnlockSpaceID": pendingLockedSpaceUnlockSpaceID ?? NSNull()
                ])
            }
            return
        }

        cancelPendingLockedSpaceUnlock()
        if lockedSpaceFilterID == spaceID {
            scheduleLockedSpaceUnlock(spaceID)
            return
        }

        applySpaceLaneSingleClick(spaceID)
    }

    private func applySpaceLaneSingleClick(_ spaceID: UInt64) {
        guard let sourceViewModel else {
            lastSpaceFilterAction = "blockedNoSourceViewModel"
            DevelopmentDiagnostics.log("quickSwitch.spaceFilter.click.blocked", [
                "spaceID": spaceID,
                "reason": "noSourceViewModel"
            ])
            onSnapshotUpdated?()
            return
        }

        if let fullscreenSelection = QuickSwitchSpaceFilterPolicy.singleFullscreenSelection(
            inSpaceID: spaceID,
            viewModel: sourceViewModel
        ) {
            lockedSpaceFilterID = nil
            selectionBeforeSpaceFilter = nil
            lastSpaceFilterAction = "activateSingleFullscreen"
            let visibleViewModel = projectedViewModel(from: sourceViewModel)
            currentViewModel = visibleViewModel
            view.applyProjected(viewModel: visibleViewModel)
            DevelopmentDiagnostics.log("quickSwitch.spaceFilter.singleFullscreenActivate", [
                "spaceID": spaceID,
                "windowID": fullscreenSelection.windowID
            ])
            commitSelection(fullscreenSelection, source: .mouse, in: sourceViewModel)
            return
        }

        let preferredSelection: QuickSwitchSelection?
        if lockedSpaceFilterID == spaceID {
            lockedSpaceFilterID = nil
            preferredSelection = selectionBeforeSpaceFilter
            selectionBeforeSpaceFilter = nil
            lastSpaceFilterAction = "unlock"
        } else {
            if lockedSpaceFilterID == nil {
                selectionBeforeSpaceFilter = view.effectiveSelectionForProjection()
                lastSpaceFilterAction = "lock"
            } else {
                lastSpaceFilterAction = "switch"
            }
            lockedSpaceFilterID = spaceID
            preferredSelection = nil
        }

        let visibleViewModel = projectedViewModel(
            from: sourceViewModel,
            preferredSelection: preferredSelection
        )
        currentViewModel = visibleViewModel
        view.applyProjected(viewModel: visibleViewModel)
        DevelopmentDiagnostics.log("quickSwitch.spaceFilter.apply", [
            "spaceID": spaceID,
            "lockedSpaceID": lockedSpaceFilterID,
            "action": lastSpaceFilterAction,
            "visibleAppCount": visibleViewModel.appShelf.count,
            "visibleWindowCount": visibleViewModel.windowCount
        ])

        if disableScreenshotRefresh {
            view.markScreenshotsNotRequested(for: visibleViewModel, reason: "disabledByLaunchOption")
            screenshotTask?.cancel()
            screenshotTask = nil
        } else {
            scheduleScreenshotRefresh(for: visibleViewModel, generation: sessionGeneration)
        }

        onSnapshotUpdated?()
    }

    @discardableResult
    private func handleBackgroundClick() -> Bool {
        guard lockedSpaceFilterID != nil else { return false }

        cancelPendingLockedSpaceUnlock()
        let unlocked = unlockSpaceFilter(action: "unlockBackground")
        DevelopmentDiagnostics.log("quickSwitch.spaceFilter.backgroundUnlock", [
            "unlocked": unlocked
        ])
        return unlocked
    }

    private func scheduleLockedSpaceUnlock(_ spaceID: UInt64) {
        pendingLockedSpaceUnlockSpaceID = spaceID
        let delay = max(0.12, NSEvent.doubleClickInterval + 0.03)
        DevelopmentDiagnostics.log("quickSwitch.spaceFilter.unlock.pending", [
            "spaceID": spaceID,
            "delay": delay
        ])

        pendingLockedSpaceUnlockTask = Task { @MainActor [weak self] in
            try? await Task.sleep(nanoseconds: UInt64(delay * 1_000_000_000))
            guard !Task.isCancelled,
                  let self,
                  self.pendingLockedSpaceUnlockSpaceID == spaceID
            else {
                return
            }

            self.pendingLockedSpaceUnlockSpaceID = nil
            self.pendingLockedSpaceUnlockTask = nil
            self.applySpaceLaneSingleClick(spaceID)
        }
    }

    private func cancelPendingLockedSpaceUnlock() {
        pendingLockedSpaceUnlockTask?.cancel()
        pendingLockedSpaceUnlockTask = nil
        pendingLockedSpaceUnlockSpaceID = nil
    }

    @discardableResult
    private func unlockSpaceFilter(action: String) -> Bool {
        guard let sourceViewModel, lockedSpaceFilterID != nil else {
            return false
        }

        lockedSpaceFilterID = nil
        let preferredSelection = selectionBeforeSpaceFilter
        selectionBeforeSpaceFilter = nil
        lastSpaceFilterAction = action

        let visibleViewModel = projectedViewModel(
            from: sourceViewModel,
            preferredSelection: preferredSelection
        )
        currentViewModel = visibleViewModel
        view.applyProjected(viewModel: visibleViewModel)

        if disableScreenshotRefresh {
            view.markScreenshotsNotRequested(for: visibleViewModel, reason: "disabledByLaunchOption")
            screenshotTask?.cancel()
            screenshotTask = nil
        } else {
            scheduleScreenshotRefresh(for: visibleViewModel, generation: sessionGeneration)
        }

        onSnapshotUpdated?()
        return true
    }

    private func activateLockedSpace(_ spaceID: UInt64) {
        guard lockedSpaceFilterID == spaceID else {
            DevelopmentDiagnostics.log("quickSwitch.spaceFilter.activateSpace.ignored", [
                "spaceID": spaceID,
                "lockedSpaceID": lockedSpaceFilterID ?? NSNull()
            ])
            return
        }

        guard let sourceViewModel else {
            lastSpaceFilterAction = "blockedNoSourceViewModel"
            DevelopmentDiagnostics.log("quickSwitch.spaceFilter.activateSpace.blocked", [
                "spaceID": spaceID,
                "reason": "noSourceViewModel"
            ])
            onSnapshotUpdated?()
            return
        }

        lockedSpaceFilterID = nil
        selectionBeforeSpaceFilter = nil
        lastSpaceFilterAction = "activateSpace"
        lastSpaceActivationSpaceID = spaceID
        lastSpaceActivationDidRequestFocus = nil
        lastSpaceActivationDisplayIdentifier = nil
        lastSpaceActivationPreviousCurrentSpaceID = nil
        lastSpaceActivationError = nil

        let visibleViewModel = projectedViewModel(from: sourceViewModel)
        currentViewModel = visibleViewModel
        view.applyProjected(viewModel: visibleViewModel)

        DevelopmentDiagnostics.log("quickSwitch.spaceFilter.activateSpace.start", [
            "spaceID": spaceID
        ])
        hide(reason: .userClosed)
        let outcome = spaceActivationService.activate(spaceID: spaceID)
        lastSpaceActivationSpaceID = outcome.targetSpaceID
        lastSpaceActivationDidRequestFocus = outcome.didRequestFocus
        lastSpaceActivationDisplayIdentifier = outcome.displayIdentifier
        lastSpaceActivationPreviousCurrentSpaceID = outcome.previousCurrentSpaceID
        lastSpaceActivationError = outcome.error
        DevelopmentDiagnostics.log("quickSwitch.spaceFilter.activateSpace.result", [
            "spaceID": outcome.targetSpaceID,
            "displayIdentifier": outcome.displayIdentifier ?? NSNull(),
            "previousCurrentSpaceID": outcome.previousCurrentSpaceID ?? NSNull(),
            "didRequestFocus": outcome.didRequestFocus,
            "error": outcome.error ?? NSNull()
        ])
        onSnapshotUpdated?()
    }

@@ -557,12 +904,12 @@
                "result": Self.closeResultString(result)
            ])
            if result == .requested {
                suppressCloseTarget(request)
                DevelopmentDiagnostics.log("quickSwitch.close.request.refreshAfterClose", [
                    "targetKind": request.kindDescription,
                    "appGroupIndex": request.appGroupIndex,
                    "appName": request.appName,
                    "windowID": request.windowID
                    "windowID": request.windowID,
                    "optimisticRemove": false
                ])
                pendingCloseVerification = PendingCloseVerification(
                    request: request,
@@ -618,10 +965,10 @@
            suppressedCloseTargets.append(target)
        }

        guard let currentViewModel else { return }
        let visibleViewModel = viewModel(currentViewModel, excluding: suppressedCloseTargets)
        guard let sourceViewModel else { return }
        let visibleViewModel = projectedViewModel(from: sourceViewModel, preferredSelection: view.effectiveSelectionForProjection())
        self.currentViewModel = visibleViewModel
        view.apply(viewModel: visibleViewModel)
        view.applyProjected(viewModel: visibleViewModel)
        DevelopmentDiagnostics.log("quickSwitch.close.optimisticRemove", [
            "targetKind": request.kindDescription,
            "appGroupIndex": request.appGroupIndex,
@@ -632,18 +979,37 @@
        ])
    }

    private func suppressActivationWindowID(_ windowID: UInt32, reason: String) {
        guard windowID != 0 else { return }
        suppressedActivationWindowIDs.insert(windowID)

        guard let sourceViewModel else { return }
        let visibleViewModel = projectedViewModel(from: sourceViewModel, preferredSelection: view.effectiveSelectionForProjection())
        self.currentViewModel = visibleViewModel
        view.applyProjected(viewModel: visibleViewModel)
        DevelopmentDiagnostics.log("quickSwitch.activation.suppressWindow", [
            "windowID": windowID,
            "reason": reason,
            "remainingWindowCount": visibleViewModel.windowCount,
            "suppressedActivationWindowCount": suppressedActivationWindowIDs.count
        ])
    }

    private func viewModel(
        _ viewModel: QuickSwitchViewModel,
        excluding suppressedTargets: [SuppressedCloseTarget]
        excluding suppressedTargets: [SuppressedCloseTarget],
        suppressedActivationWindowIDs: Set<UInt32> = []
    ) -> QuickSwitchViewModel {
        guard !suppressedTargets.isEmpty else { return viewModel }
        guard !suppressedTargets.isEmpty || !suppressedActivationWindowIDs.isEmpty else { return viewModel }

        var nextGlobalIndex = 0
        let columns = viewModel.waterfallColumns.compactMap { column -> QuickSwitchWaterfallColumnViewModel? in
            let windows = column.windows.filter { card in
                !suppressedTargets.contains { target in
                let isActivationSuppressed = suppressedActivationWindowIDs.contains(card.window.id)
                let isCloseSuppressed = suppressedTargets.contains { target in
                    suppressedTarget(target, matches: card)
                }
                return !isActivationSuppressed && !isCloseSuppressed
            }
            guard !windows.isEmpty else { return nil }

@@ -683,7 +1049,24 @@
            displays: viewModel.displays,
            appShelf: appShelf,
            waterfallColumns: columns,
            initialSelection: initialSelection(in: columns, fallback: viewModel.initialSelection)
            initialSelection: initialSelection(in: columns, fallback: viewModel.initialSelection),
            lockedSpaceID: viewModel.lockedSpaceID
        )
    }

    private func projectedViewModel(
        from sourceViewModel: QuickSwitchViewModel,
        preferredSelection: QuickSwitchSelection? = nil
    ) -> QuickSwitchViewModel {
        let closeProjectedViewModel = viewModel(
            sourceViewModel,
            excluding: suppressedCloseTargets,
            suppressedActivationWindowIDs: suppressedActivationWindowIDs
        )
        return QuickSwitchSpaceFilterPolicy.projectedViewModel(
            from: closeProjectedViewModel,
            lockedSpaceID: lockedSpaceFilterID,
            preferredSelection: preferredSelection
        )
    }

@@ -736,15 +1119,27 @@

    private func shouldCloseAfterActivation(_ result: WindowActivationResult?) -> Bool {
        switch result {
        case .activated, .restored, .appActivatedOnly:
        case .activated, .restored:
            return true
        case .windowNotFound, .unsupported, .activationFailed, .failed, nil:
        case .appActivatedOnly, .windowNotFound, .unsupported, .activationFailed, .failed, nil:
            return false
        }
    }

    private func window(for selection: QuickSwitchSelection) -> AlignerWindow? {
        currentViewModel?
    private func shouldSuppressAfterActivationResult(_ result: WindowActivationResult?) -> Bool {
        switch result {
        case .windowNotFound, .unsupported, .activationFailed, .failed:
            return true
        case .activated, .restored, .appActivatedOnly, nil:
            return false
        }
    }

    private func window(
        for selection: QuickSwitchSelection,
        in viewModel: QuickSwitchViewModel?
    ) -> AlignerWindow? {
        viewModel?
            .waterfallColumns
            .flatMap(\.windows)
            .first { card in
@@ -772,7 +1167,11 @@
        switch result {
        case .success(let success):
            currentSnapshot = success.snapshot
            let visibleViewModel = viewModel(success.viewModel, excluding: suppressedCloseTargets)
            sourceViewModel = success.viewModel
            let visibleViewModel = projectedViewModel(
                from: success.viewModel,
                preferredSelection: view.effectiveSelectionForProjection()
            )
            currentViewModel = visibleViewModel
            lastSnapshotError = nil
            snapshotStartElapsedMilliseconds = success.timing.startElapsedMilliseconds
@@ -808,6 +1207,7 @@
            }
        case .failure(let failure):
            currentSnapshot = nil
            sourceViewModel = nil
            currentViewModel = nil
            lastSnapshotError = failure.message
            snapshotStartElapsedMilliseconds = failure.timing.startElapsedMilliseconds
@@ -1169,6 +1569,9 @@
    let fixtureMultiDisplay: Bool
    let fixtureCandidateFiltering: Bool
    let fixtureActivation: Bool
    let fixtureSpaceFilter: Bool
    let fixtureSplitView: Bool
    let fixtureMultiPageIdentity: Bool
    let debugHoveredAppGroupIndex: Int?
    let debugOverlayWidth: CGFloat?
    let debugKeySequence: [String]
@@ -1177,9 +1580,11 @@
    let debugWindowActivation: Bool
    let debugWindowClose: Bool
    let disableScreenshotRefresh: Bool
    let waterfallViewMode: QuickSwitchWaterfallViewMode?
    let lifecycleCycles: Int?
    let lifecycleInterval: TimeInterval
    let lifecycleVisibleDuration: TimeInterval
    let simulateDockReopenAfter: TimeInterval?

    static func parse(arguments: [String]) -> Round1QuickSwitchLaunchOptions {
        Round1QuickSwitchLaunchOptions(
@@ -1195,6 +1600,9 @@
            fixtureMultiDisplay: arguments.contains("--round01-fixture-multi-display"),
            fixtureCandidateFiltering: arguments.contains("--round01-fixture-candidate-filtering"),
            fixtureActivation: arguments.contains("--round01-fixture-window-activation"),
            fixtureSpaceFilter: arguments.contains("--round01-fixture-space-filter"),
            fixtureSplitView: arguments.contains("--round01-fixture-split-view"),
            fixtureMultiPageIdentity: arguments.contains("--round01-fixture-multi-page-identity"),
            debugHoveredAppGroupIndex: intValue(for: "--round01-debug-hover-app-index", in: arguments),
            debugOverlayWidth: cgFloatValue(for: "--round01-debug-overlay-width", in: arguments),
            debugKeySequence: stringListValue(for: "--round01-debug-key-sequence", in: arguments),
@@ -1203,9 +1611,11 @@
            debugWindowActivation: arguments.contains("--round01-debug-window-activation"),
            debugWindowClose: arguments.contains("--round01-debug-window-close"),
            disableScreenshotRefresh: arguments.contains("--round01-disable-screenshot-refresh"),
            waterfallViewMode: waterfallViewModeValue(for: "--round01-waterfall-view-mode", in: arguments),
            lifecycleCycles: intValue(for: "--round01-quick-switch-lifecycle-cycles", in: arguments),
            lifecycleInterval: timeInterval(for: "--round01-quick-switch-lifecycle-interval", in: arguments) ?? 0.02,
            lifecycleVisibleDuration: timeInterval(for: "--round01-quick-switch-lifecycle-visible-duration", in: arguments) ?? 0.16
            lifecycleVisibleDuration: timeInterval(for: "--round01-quick-switch-lifecycle-visible-duration", in: arguments) ?? 0.16,
            simulateDockReopenAfter: timeInterval(for: "--round01-simulate-dock-reopen-after", in: arguments)
        )
    }

@@ -1227,6 +1637,22 @@
        return String(argument.dropFirst(prefix.count))
    }

    private static func waterfallViewModeValue(
        for key: String,
        in arguments: [String]
    ) -> QuickSwitchWaterfallViewMode? {
        guard let value = stringValue(for: key, in: arguments) else { return nil }

        switch value {
        case "vertical", "vertical-columns", "verticalColumns":
            return .verticalColumns
        case "horizontal", "horizontal-masonry", "horizontalMasonry":
            return .horizontalMasonry
        default:
            return nil
        }
    }

    private static func intValue(for key: String, in arguments: [String]) -> Int? {
        stringValue(for: key, in: arguments).flatMap(Int.init)
    }