Fix Finder split view tab activation regression

Ariver

2026-06-13 a2293c5609ee7b5b7bbfce3b4c0dc7ae365e31ff

 C1.source/Sources/Aligner/Infrastructure/Windows/CGWindowAXWindowService.swift

@@ -14,6 +14,17 @@
    private let privateSpaceActivationBridge: PrivateSpaceActivationBridge?
    private var restorableAXWindowsByID: [UInt32: RestorableAXWindow] = [:]

    private struct FinderTabControl {
        let button: AXUIElement
        let tabGroup: AXUIElement?
    }

    private struct KeyboardShortcut {
        let name: String
        let keyCode: CGKeyCode
        let flags: CGEventFlags
    }

    init(
        spaceIDsByWindowIDProvider: @escaping ([UInt32]) -> [UInt32: [UInt64]],
        appCategorizer: any AppCategorizer = BundleIDAppCategorizer(),
@@ -162,16 +173,13 @@
        let privateActivationOutcome = activateViaPrivateWindowServerAPI(window)
        let didPrivatelyActivate = privateActivationOutcome?.succeeded == true

        let axWindow = AXWindowMetadataReader
            .metadata(appCategorizer: appCategorizer)
            .first { metadata in
                if let windowID = metadata.windowID {
                    return windowID == window.id
                }

                return metadata.processIdentifier == window.app.processIdentifier
                    && metadata.title == window.title
            }
        let currentAXMetadata = AXWindowMetadataReader.metadata(appCategorizer: appCategorizer)
        let axWindow = axWindow(
            for: window,
            in: currentAXMetadata,
            operation: "windowActivation",
            matchAttempt: "initial"
        )

        DevelopmentDiagnostics.log("windowActivation.activate.axLookup", [
            "windowID": window.id,
@@ -192,6 +200,20 @@
            "spaceFocusError": spaceFocusOutcome?.error
        ])
        guard let axWindow else {
            if let finderTabActivated = activateFinderTabPageIfNeeded(
                window: window,
                axMetadata: currentAXMetadata,
                operation: "windowActivation",
                reason: "axMissing"
            ) {
                DevelopmentDiagnostics.log("windowActivation.activate.finderTabResult", [
                    "windowID": window.id,
                    "pid": window.app.processIdentifier,
                    "activated": finderTabActivated
                ])
                return finderTabActivated ? .activated : .activationFailed
            }

            let activated = activateApplication(for: window)
            DevelopmentDiagnostics.log("windowActivation.activate.axMissing", [
                "windowID": window.id,
@@ -273,6 +295,15 @@
        var matchedAXWindow = axWindow(for: window, in: axMetadata)
        var finalAXMetadata = axMetadata

        let shouldPreferFocusedPageClose = matchedAXWindow?.windowID != window.id
        if shouldPreferFocusedPageClose,
           let focusedPageCloseResult = closeFocusedPageViaCommandW(
            window: window,
            reason: matchedAXWindow == nil ? "axMissing" : "nonDirectAXMatch"
           ) {
            return focusedPageCloseResult
        }

        if matchedAXWindow == nil {
            Thread.sleep(forTimeInterval: 0.12)
            finalAXMetadata = AXWindowMetadataReader.metadata(appCategorizer: appCategorizer)
@@ -289,6 +320,14 @@
                "matchingSizeCandidateCount": matchingAXSizeCandidateCount(for: window, in: finalAXMetadata)
            ])
            return .windowNotFound
        }

        if matchedAXWindow.windowID != window.id,
           let focusedPageCloseResult = closeFocusedPageViaCommandW(
            window: window,
            reason: "retryNonDirectAXMatch"
           ) {
            return focusedPageCloseResult
        }

        guard let closeButton = closeButton(for: matchedAXWindow) else {
@@ -364,13 +403,98 @@
        }
    }

    private func closeFocusedPageViaCommandW(
        window: AlignerWindow,
        reason: String
    ) -> WindowCloseResult? {
        guard window.identifierSource == .cgWindow,
              let processIdentifier = window.app.processIdentifier
        else {
            DevelopmentDiagnostics.log("windowClose.commandW.skipped", [
                "windowID": window.id,
                "reason": reason,
                "identifierSource": String(describing: window.identifierSource),
                "hasPID": window.app.processIdentifier != nil
            ])
            return nil
        }

        if let finderTabActivated = activateFinderTabPageIfNeeded(
            window: window,
            axMetadata: AXWindowMetadataReader.metadata(appCategorizer: appCategorizer),
            operation: "windowClose",
            reason: reason
        ) {
            guard finderTabActivated else {
                DevelopmentDiagnostics.log("windowClose.commandW.finderTabActivationFailed", [
                    "windowID": window.id,
                    "pid": processIdentifier,
                    "reason": reason
                ])
                return .failed("finderTabActivationFailed")
            }
        } else {
            guard let activationOutcome = activateViaPrivateWindowServerAPI(window),
                  activationOutcome.succeeded
            else {
                DevelopmentDiagnostics.log("windowClose.commandW.activationFailed", [
                    "windowID": window.id,
                    "pid": processIdentifier,
                    "reason": reason
                ])
                return nil
            }
        }

        Thread.sleep(forTimeInterval: 0.08)
        guard postCommandW(to: processIdentifier) else {
            DevelopmentDiagnostics.log("windowClose.commandW.postFailed", [
                "windowID": window.id,
                "pid": processIdentifier,
                "reason": reason
            ])
            return .failed("commandWPostFailed")
        }

        DevelopmentDiagnostics.log("windowClose.commandW.requested", [
            "windowID": window.id,
            "pid": processIdentifier,
            "reason": reason
        ])
        return .requested
    }

    private func postCommandW(to processIdentifier: Int32) -> Bool {
        let source = CGEventSource(stateID: .combinedSessionState)
        guard let keyDown = CGEvent(
            keyboardEventSource: source,
            virtualKey: Self.commandWVirtualKeyCode,
            keyDown: true
        ),
              let keyUp = CGEvent(
                keyboardEventSource: source,
                virtualKey: Self.commandWVirtualKeyCode,
                keyDown: false
              )
        else {
            return false
        }

        keyDown.flags = .maskCommand
        keyUp.flags = .maskCommand
        keyDown.postToPid(processIdentifier)
        keyUp.postToPid(processIdentifier)
        return true
    }

    private func axWindow(
        for window: AlignerWindow,
        in axMetadata: [AXWindowMetadata],
        operation: String = "windowClose",
        matchAttempt: String = "initial"
    ) -> AXWindowMetadata? {
        if let directMatch = axMetadata.first(where: { $0.windowID == window.id }) {
            DevelopmentDiagnostics.log("windowClose.axMatch.directWindowID", [
            DevelopmentDiagnostics.log("\(operation).axMatch.directWindowID", [
                "windowID": window.id,
                "pid": window.app.processIdentifier,
                "attempt": matchAttempt
@@ -382,12 +506,35 @@
            return nil
        }

        if let geometryFingerprint = axWindowGeometryFingerprint(for: window) {
            let geometryMatches = axMetadata.filter { metadata in
                AXWindowGeometryFingerprint(metadata) == geometryFingerprint
            }
            if geometryMatches.count == 1 {
                DevelopmentDiagnostics.log("\(operation).axMatch.geometryFingerprint", [
                    "windowID": window.id,
                    "pid": processIdentifier,
                    "attempt": matchAttempt
                ])
                return geometryMatches[0]
            }

            if geometryMatches.count > 1 {
                DevelopmentDiagnostics.log("\(operation).axMatch.geometryFingerprintAmbiguous", [
                    "windowID": window.id,
                    "pid": processIdentifier,
                    "candidateCount": geometryMatches.count,
                    "attempt": matchAttempt
                ])
            }
        }

        if let cgFingerprint = cgWindowFingerprint(for: window) {
            let fingerprintMatches = axMetadata.filter { metadata in
                AXWindowFingerprint(metadata) == cgFingerprint
            }
            if fingerprintMatches.count == 1 {
                DevelopmentDiagnostics.log("windowClose.axMatch.fingerprint", [
                DevelopmentDiagnostics.log("\(operation).axMatch.fingerprint", [
                    "windowID": window.id,
                    "pid": processIdentifier,
                    "attempt": matchAttempt
@@ -396,10 +543,11 @@
            }

            if fingerprintMatches.count > 1 {
                DevelopmentDiagnostics.log("windowClose.axMatch.fingerprintAmbiguous", [
                DevelopmentDiagnostics.log("\(operation).axMatch.fingerprintAmbiguous", [
                    "windowID": window.id,
                    "pid": processIdentifier,
                    "candidateCount": fingerprintMatches.count
                    "candidateCount": fingerprintMatches.count,
                    "attempt": matchAttempt
                ])
            }
        }
@@ -409,8 +557,8 @@
            metadata.processIdentifier == processIdentifier
                && normalizedWindowTitle(metadata.title ?? "") == normalizedTitle
        }
        if titleMatches.count == 1 {
            DevelopmentDiagnostics.log("windowClose.axMatch.normalizedTitle", [
        if !normalizedTitle.isEmpty, titleMatches.count == 1 {
            DevelopmentDiagnostics.log("\(operation).axMatch.normalizedTitle", [
                "windowID": window.id,
                "pid": processIdentifier,
                "attempt": matchAttempt
@@ -424,7 +572,7 @@
            processIdentifier: processIdentifier,
            in: axMetadata
           ) {
            DevelopmentDiagnostics.log("windowClose.axMatch.finderFallback", [
            DevelopmentDiagnostics.log("\(operation).axMatch.finderFallback", [
                "windowID": window.id,
                "pid": processIdentifier,
                "attempt": matchAttempt
@@ -433,10 +581,11 @@
        }

        if titleMatches.count > 1 {
            DevelopmentDiagnostics.log("windowClose.axMatch.titleAmbiguous", [
            DevelopmentDiagnostics.log("\(operation).axMatch.titleAmbiguous", [
                "windowID": window.id,
                "pid": processIdentifier,
                "candidateCount": titleMatches.count
                "candidateCount": titleMatches.count,
                "attempt": matchAttempt
            ])
        }

@@ -459,6 +608,688 @@
        return finderCandidates.count == 1 ? finderCandidates[0] : nil
    }

    private func activateFinderTabPageIfNeeded(
        window: AlignerWindow,
        axMetadata: [AXWindowMetadata],
        operation: String,
        reason: String
    ) -> Bool? {
        guard isFinderCGOnlyPageCandidate(window),
              let processIdentifier = window.app.processIdentifier
        else {
            return nil
        }

        guard let host = finderTabHostAXWindow(for: window, in: axMetadata) else {
            let normalizedTargetTitle = normalizedWindowTitle(window.title)
            let applicationActivated = activateApplication(processIdentifier: processIdentifier)
            let selectedViaWindowMenu = !normalizedTargetTitle.isEmpty
                && selectFinderWindowMenuItem(
                    processIdentifier: processIdentifier,
                    window: window,
                    normalizedTargetTitle: normalizedTargetTitle
                )
            DevelopmentDiagnostics.log("\(operation).finderTab.hostlessWindowMenuResult", [
                "windowID": window.id,
                "pid": processIdentifier,
                "reason": reason,
                "applicationActivated": applicationActivated,
                "selectedViaWindowMenu": selectedViaWindowMenu,
                "spaceIDs": window.spaceIDs,
                "targetTitleHash": DevelopmentDiagnostics.stableFingerprint(window.title),
                "targetTitleLength": window.title.count
            ])
            if selectedViaWindowMenu {
                return true
            }

            DevelopmentDiagnostics.log("\(operation).finderTab.hostMissing", [
                "windowID": window.id,
                "pid": processIdentifier,
                "reason": reason,
                "spaceIDs": window.spaceIDs
            ])
            return false
        }

        let hostPrivateActivationSucceeded: Bool
        if let hostWindowID = host.windowID,
           let privateActivationBridge {
            hostPrivateActivationSucceeded = privateActivationBridge.activate(
                processIdentifier: processIdentifier,
                windowID: hostWindowID
            ).succeeded
        } else {
            hostPrivateActivationSucceeded = false
        }

        let applicationActivated = activateApplication(processIdentifier: processIdentifier)
        let focusBeforeResult = focusWindowResult(host.element, processIdentifier: processIdentifier)
        let raiseBeforeResult = raiseWindowResult(host.element)
        let selectedTab = selectFinderTab(window, in: host)
        Thread.sleep(forTimeInterval: 0.05)
        let focusAfterResult: AXActionResult?
        let raiseAfterResult: AXActionResult?
        if selectedTab {
            // For Finder tab/page cards, re-focusing the original host AX window after
            // selecting the tab can switch Finder back to the host's previous tab.
            focusAfterResult = nil
            raiseAfterResult = nil
        } else {
            focusAfterResult = focusWindowResult(host.element, processIdentifier: processIdentifier)
            raiseAfterResult = raiseWindowResult(host.element)
        }

        let didFocusOrRaise = focusBeforeResult.success
            || raiseBeforeResult.success
            || (focusAfterResult?.success ?? false)
            || (raiseAfterResult?.success ?? false)
        let activated = selectedTab
            && (hostPrivateActivationSucceeded || applicationActivated || didFocusOrRaise)

        DevelopmentDiagnostics.log("\(operation).finderTab.result", [
            "windowID": window.id,
            "pid": processIdentifier,
            "reason": reason,
            "hostWindowID": host.windowID,
            "hostTitleHash": DevelopmentDiagnostics.stableFingerprint(host.title),
            "hostTitleLength": host.title?.count,
            "hostPrivateActivated": hostPrivateActivationSucceeded,
            "applicationActivated": applicationActivated,
            "selectedTab": selectedTab,
            "focusBeforeAXError": String(describing: focusBeforeResult.error),
            "raiseBeforeAXError": String(describing: raiseBeforeResult.error),
            "focusAfterAXError": focusAfterResult.map { String(describing: $0.error) } ?? "skippedAfterTabSelection",
            "raiseAfterAXError": raiseAfterResult.map { String(describing: $0.error) } ?? "skippedAfterTabSelection",
            "activated": activated
        ])

        return activated
    }

    private func isFinderCGOnlyPageCandidate(_ window: AlignerWindow) -> Bool {
        window.identifierSource == .cgWindow
            && window.app.bundleIdentifier == "com.apple.finder"
            && !window.title.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
    }

    private func finderTabHostAXWindow(
        for window: AlignerWindow,
        in axMetadata: [AXWindowMetadata]
    ) -> AXWindowMetadata? {
        guard let processIdentifier = window.app.processIdentifier else { return nil }
        let candidates = axMetadata.filter { metadata in
            metadata.processIdentifier == processIdentifier
                && metadata.subrole == .standard
                && metadata.frame?.isEmpty == false
        }
        guard !candidates.isEmpty else { return nil }

        let targetSpaceIDs = Set(window.spaceIDs)
        let candidateIDs = candidates.compactMap(\.windowID)
        let candidateSpacesByID = targetSpaceIDs.isEmpty ? [:] : spaceIDsByWindowIDProvider(candidateIDs)
        let spaceCompatibleCandidates = targetSpaceIDs.isEmpty
            ? candidates
            : candidates.filter { metadata in
                guard let windowID = metadata.windowID else { return false }
                return !Set(candidateSpacesByID[windowID] ?? []).isDisjoint(with: targetSpaceIDs)
            }
        let spaceScopedCandidates = spaceCompatibleCandidates.isEmpty ? candidates : spaceCompatibleCandidates
        let selectableHostCandidates = spaceScopedCandidates.filter { metadata in
            finderHostCanRepresentTarget(window, in: metadata)
        }

        let hostCandidates = selectableHostCandidates.isEmpty
            ? spaceScopedCandidates
            : selectableHostCandidates

        let targetFrame = matchingFrame(for: window)
        let scoredHosts = hostCandidates.compactMap { metadata -> (metadata: AXWindowMetadata, score: CGFloat)? in
            guard let score = frameOverlapScore(targetFrame, metadata.frame),
                  score >= 0.85
            else {
                return nil
            }

            return (metadata, score)
        }
        .sorted { lhs, rhs in
            if lhs.score != rhs.score {
                return lhs.score > rhs.score
            }
            return (lhs.metadata.windowID ?? UInt32.max) < (rhs.metadata.windowID ?? UInt32.max)
        }

        if let best = scoredHosts.first {
            if scoredHosts.count == 1 {
                if selectableHostCandidates.isEmpty {
                    DevelopmentDiagnostics.log("windowActivation.finderTab.frameInferredHost", [
                        "windowID": window.id,
                        "hostWindowID": best.metadata.windowID,
                        "score": Double(best.score),
                        "spaceIDCount": targetSpaceIDs.count,
                        "candidateCount": hostCandidates.count,
                        "targetTitleHash": DevelopmentDiagnostics.stableFingerprint(window.title),
                        "targetTitleLength": window.title.count
                    ])
                }
                return best.metadata
            }

            let secondBest = scoredHosts[1]
            if best.score - secondBest.score >= 0.05 {
                if selectableHostCandidates.isEmpty {
                    DevelopmentDiagnostics.log("windowActivation.finderTab.frameInferredHost", [
                        "windowID": window.id,
                        "hostWindowID": best.metadata.windowID,
                        "score": Double(best.score),
                        "secondBestScore": Double(secondBest.score),
                        "spaceIDCount": targetSpaceIDs.count,
                        "candidateCount": hostCandidates.count,
                        "targetTitleHash": DevelopmentDiagnostics.stableFingerprint(window.title),
                        "targetTitleLength": window.title.count
                    ])
                }
                return best.metadata
            }
        }

        if hostCandidates.count == 1 {
            if selectableHostCandidates.isEmpty {
                DevelopmentDiagnostics.log("windowActivation.finderTab.singleFrameHostFallback", [
                    "windowID": window.id,
                    "hostWindowID": hostCandidates[0].windowID,
                    "spaceIDCount": targetSpaceIDs.count,
                    "targetTitleHash": DevelopmentDiagnostics.stableFingerprint(window.title),
                    "targetTitleLength": window.title.count
                ])
            }
            return hostCandidates[0]
        }

        DevelopmentDiagnostics.log("windowActivation.finderTab.hostAmbiguous", [
            "windowID": window.id,
            "candidateCount": hostCandidates.count,
            "spaceIDCount": targetSpaceIDs.count,
            "hasTargetFrame": targetFrame != nil,
            "targetTitleHash": DevelopmentDiagnostics.stableFingerprint(window.title),
            "targetTitleLength": window.title.count
        ])
        return nil
    }

    private func finderHostCanRepresentTarget(
        _ window: AlignerWindow,
        in host: AXWindowMetadata
    ) -> Bool {
        let normalizedTargetTitle = normalizedWindowTitle(window.title)
        guard !normalizedTargetTitle.isEmpty else { return false }

        if normalizedWindowTitle(host.title ?? "") == normalizedTargetTitle {
            return true
        }

        return finderTabControl(matchingNormalizedTitle: normalizedTargetTitle, in: host.element) != nil
    }

    private func selectFinderTab(
        _ window: AlignerWindow,
        in host: AXWindowMetadata
    ) -> Bool {
        let normalizedTargetTitle = normalizedWindowTitle(window.title)
        guard !normalizedTargetTitle.isEmpty else { return false }

        if normalizedWindowTitle(host.title ?? "") == normalizedTargetTitle {
            return true
        }

        guard let tabControl = finderTabControl(
            matchingNormalizedTitle: normalizedTargetTitle,
            in: host.element
        ) else {
            DevelopmentDiagnostics.log("windowActivation.finderTab.tabButtonMissing", [
                "windowID": window.id,
                "hostWindowID": host.windowID,
                "targetTitleHash": DevelopmentDiagnostics.stableFingerprint(window.title),
                "targetTitleLength": window.title.count
            ])
            if let processIdentifier = window.app.processIdentifier,
               selectFinderWindowMenuItem(
                processIdentifier: processIdentifier,
                window: window,
                normalizedTargetTitle: normalizedTargetTitle
               ) {
                return true
            }
            if let processIdentifier = window.app.processIdentifier,
               selectFinderTabByCyclingTabs(
                processIdentifier: processIdentifier,
                host: host,
                window: window,
                normalizedTargetTitle: normalizedTargetTitle
               ) {
                return true
            }
            return false
        }

        let tabButton = tabControl.button
        let tabButtonRole = axStringAttribute(kAXRoleAttribute as String, for: tabButton)
        let tabButtonSubrole = axStringAttribute(kAXSubroleAttribute as String, for: tabButton)
        let pressResult = AXUIElementPerformAction(tabButton, kAXPressAction as CFString)
        DevelopmentDiagnostics.log("windowActivation.finderTab.pressTab", [
            "windowID": window.id,
            "hostWindowID": host.windowID,
            "tabButtonRole": tabButtonRole,
            "tabButtonSubrole": tabButtonSubrole,
            "axError": String(describing: pressResult)
        ])
        if pressResult == .success,
           finderHostTitleMatchesTarget(host, normalizedTargetTitle: normalizedTargetTitle) {
            return true
        }

        if let tabGroup = tabControl.tabGroup {
            let selectedChildrenResult = AXUIElementSetAttributeValue(
                tabGroup,
                kAXSelectedChildrenAttribute as CFString,
                [tabButton] as CFArray
            )
            DevelopmentDiagnostics.log("windowActivation.finderTab.setSelectedChildren", [
                "windowID": window.id,
                "hostWindowID": host.windowID,
                "axError": String(describing: selectedChildrenResult)
            ])
            if selectedChildrenResult == .success,
               finderHostTitleMatchesTarget(host, normalizedTargetTitle: normalizedTargetTitle) {
                return true
            }
        }

        let valueResult = AXUIElementSetAttributeValue(
            tabButton,
            kAXValueAttribute as CFString,
            kCFBooleanTrue
        )
        DevelopmentDiagnostics.log("windowActivation.finderTab.setValue", [
            "windowID": window.id,
            "hostWindowID": host.windowID,
            "axError": String(describing: valueResult)
        ])
        if valueResult == .success,
           finderHostTitleMatchesTarget(host, normalizedTargetTitle: normalizedTargetTitle) {
            return true
        }

        if let processIdentifier = window.app.processIdentifier,
           selectFinderWindowMenuItem(
            processIdentifier: processIdentifier,
            window: window,
            normalizedTargetTitle: normalizedTargetTitle
           ) {
            return true
        }

        if let processIdentifier = window.app.processIdentifier,
           selectFinderTabByCyclingTabs(
            processIdentifier: processIdentifier,
            host: host,
            window: window,
            normalizedTargetTitle: normalizedTargetTitle
           ) {
            return true
        }

        let currentHostTitle = axStringAttribute(kAXTitleAttribute as String, for: host.element) ?? ""
        DevelopmentDiagnostics.log("windowActivation.finderTab.selectionVerificationFailed", [
            "windowID": window.id,
            "hostWindowID": host.windowID,
            "targetTitleHash": DevelopmentDiagnostics.stableFingerprint(window.title),
            "targetTitleLength": window.title.count,
            "currentHostTitleHash": DevelopmentDiagnostics.stableFingerprint(currentHostTitle),
            "currentHostTitleLength": currentHostTitle.count
        ])
        return false
    }

    private func finderTabButton(
        matchingNormalizedTitle targetTitle: String,
        in root: AXUIElement
    ) -> AXUIElement? {
        finderTabControl(matchingNormalizedTitle: targetTitle, in: root)?.button
    }

    private func finderTabControl(
        matchingNormalizedTitle targetTitle: String,
        in root: AXUIElement
    ) -> FinderTabControl? {
        var visitedCount = 0

        func search(_ element: AXUIElement, depth: Int, tabGroup: AXUIElement?) -> FinderTabControl? {
            visitedCount += 1
            guard visitedCount <= 240, depth <= 9 else { return nil }

            let role = axStringAttribute(kAXRoleAttribute as String, for: element)
            let subrole = axStringAttribute(kAXSubroleAttribute as String, for: element)
            let title = axStringAttribute(kAXTitleAttribute as String, for: element)
                ?? axStringAttribute(kAXDescriptionAttribute as String, for: element)
                ?? axStringAttribute(kAXValueAttribute as String, for: element)
            let isTabGroup = role == "AXTabGroup"
            let currentTabGroup = isTabGroup ? element : tabGroup
            let isTabControl = subrole == "AXTabButton"
                || (currentTabGroup != nil && (role == kAXRadioButtonRole as String || role == kAXButtonRole as String))

            if normalizedWindowTitle(title ?? "") == targetTitle,
               isTabControl {
                return FinderTabControl(button: element, tabGroup: currentTabGroup)
            }

            guard isTabGroup || currentTabGroup != nil || depth < 7 else { return nil }
            for child in axChildren(of: element) {
                if let match = search(child, depth: depth + 1, tabGroup: currentTabGroup) {
                    return match
                }
            }

            return nil
        }

        return search(root, depth: 0, tabGroup: nil)
    }

    private func finderHostTitleMatchesTarget(
        _ host: AXWindowMetadata,
        normalizedTargetTitle: String,
        attempts: Int = 10,
        delay: TimeInterval = 0.04
    ) -> Bool {
        for _ in 0..<attempts {
            Thread.sleep(forTimeInterval: delay)
            let selectedTitle = normalizedWindowTitle(
                axStringAttribute(kAXTitleAttribute as String, for: host.element) ?? ""
            )
            if selectedTitle == normalizedTargetTitle {
                return true
            }
        }

        return false
    }

    private func selectFinderWindowMenuItem(
        processIdentifier: Int32,
        window: AlignerWindow,
        normalizedTargetTitle: String
    ) -> Bool {
        let appElement = AXUIElementCreateApplication(processIdentifier)
        guard let menuBar = axElementAttribute(kAXMenuBarAttribute as String, for: appElement) else {
            DevelopmentDiagnostics.log("windowActivation.finderTab.windowMenuMissing", [
                "windowID": window.id,
                "pid": processIdentifier
            ])
            return false
        }

        for menuBarItem in axChildren(of: menuBar) where isWindowMenuBarItem(menuBarItem) {
            let openResult = AXUIElementPerformAction(menuBarItem, kAXPressAction as CFString)
            Thread.sleep(forTimeInterval: 0.08)
            guard openResult == .success,
                  let menuItem = finderWindowMenuItem(
                    matchingNormalizedTitle: normalizedTargetTitle,
                    in: menuBarItem
                  )
            else {
                continue
            }

            let pressResult = AXUIElementPerformAction(menuItem, kAXPressAction as CFString)
            DevelopmentDiagnostics.log("windowActivation.finderTab.windowMenuPress", [
                "windowID": window.id,
                "pid": processIdentifier,
                "axError": String(describing: pressResult)
            ])
            guard pressResult == .success else { return false }

            if finderFocusedWindowTitleMatches(
                processIdentifier: processIdentifier,
                window: window,
                normalizedTargetTitle: normalizedTargetTitle,
                initialDelay: 0.18,
                attempts: 18,
                delay: 0.06,
                requiredConsecutiveMatches: 3
            ) {
                DevelopmentDiagnostics.log("windowActivation.finderTab.windowMenuSucceeded", [
                    "windowID": window.id,
                    "pid": processIdentifier
                ])
                return true
            }

            DevelopmentDiagnostics.log("windowActivation.finderTab.windowMenuVerificationFailed", [
                "windowID": window.id,
                "pid": processIdentifier
            ])
        }

        DevelopmentDiagnostics.log("windowActivation.finderTab.windowMenuItemMissing", [
            "windowID": window.id,
            "pid": processIdentifier,
            "targetTitleHash": DevelopmentDiagnostics.stableFingerprint(window.title),
            "targetTitleLength": window.title.count
        ])
        return false
    }

    private func isWindowMenuBarItem(_ element: AXUIElement) -> Bool {
        let title = normalizedWindowTitle(axStringAttribute(kAXTitleAttribute as String, for: element) ?? "")
        return title == "window" || title == "窗口"
    }

    private func finderWindowMenuItem(
        matchingNormalizedTitle targetTitle: String,
        in root: AXUIElement
    ) -> AXUIElement? {
        var visitedCount = 0

        func search(_ element: AXUIElement, depth: Int) -> AXUIElement? {
            visitedCount += 1
            guard visitedCount <= 500, depth <= 8 else { return nil }

            let role = axStringAttribute(kAXRoleAttribute as String, for: element)
            let title = axStringAttribute(kAXTitleAttribute as String, for: element)
                ?? axStringAttribute(kAXDescriptionAttribute as String, for: element)
            if role == kAXMenuItemRole as String,
               normalizedWindowTitle(title ?? "") == targetTitle {
                return element
            }

            for child in axChildren(of: element) {
                if let match = search(child, depth: depth + 1) {
                    return match
                }
            }

            return nil
        }

        return search(root, depth: 0)
    }

    private func finderFocusedWindowTitleMatches(
        processIdentifier: Int32,
        window: AlignerWindow,
        normalizedTargetTitle: String,
        initialDelay: TimeInterval,
        attempts: Int,
        delay: TimeInterval,
        requiredConsecutiveMatches: Int
    ) -> Bool {
        let appElement = AXUIElementCreateApplication(processIdentifier)
        var consecutiveMatches = 0
        var lastTitle: String?

        Thread.sleep(forTimeInterval: initialDelay)
        for _ in 0..<attempts {
            let focusedWindow = axElementAttribute(kAXFocusedWindowAttribute as String, for: appElement)
                ?? axElementAttribute(kAXMainWindowAttribute as String, for: appElement)
            let title = focusedWindow.flatMap {
                axStringAttribute(kAXTitleAttribute as String, for: $0)
            }
            lastTitle = title
            if normalizedWindowTitle(title ?? "") == normalizedTargetTitle {
                consecutiveMatches += 1
            } else {
                consecutiveMatches = 0
            }

            if consecutiveMatches >= requiredConsecutiveMatches {
                return true
            }
            Thread.sleep(forTimeInterval: delay)
        }

        DevelopmentDiagnostics.log("windowActivation.finderTab.focusedTitleMismatch", [
            "windowID": window.id,
            "pid": processIdentifier,
            "targetTitleHash": DevelopmentDiagnostics.stableFingerprint(window.title),
            "targetTitleLength": window.title.count,
            "lastTitleHash": DevelopmentDiagnostics.stableFingerprint(lastTitle),
            "lastTitleLength": lastTitle?.count
        ])
        return false
    }

    private func selectFinderTabByCyclingTabs(
        processIdentifier: Int32,
        host: AXWindowMetadata,
        window: AlignerWindow,
        normalizedTargetTitle: String
    ) -> Bool {
        let maximumAttempts = 24
        for attempt in 1...maximumAttempts {
            for shortcut in Self.finderNextTabShortcuts {
                guard postKeyboardShortcut(to: processIdentifier, shortcut: shortcut) else {
                    DevelopmentDiagnostics.log("windowActivation.finderTab.cyclePostFailed", [
                        "windowID": window.id,
                        "hostWindowID": host.windowID,
                        "attempt": attempt,
                        "shortcut": shortcut.name
                    ])
                    return false
                }

                if finderHostTitleMatchesTarget(
                    host,
                    normalizedTargetTitle: normalizedTargetTitle,
                    attempts: 4,
                    delay: 0.035
                ) {
                    DevelopmentDiagnostics.log("windowActivation.finderTab.cycleSucceeded", [
                        "windowID": window.id,
                        "hostWindowID": host.windowID,
                        "attempt": attempt,
                        "shortcut": shortcut.name
                    ])
                    return true
                }
            }
        }

        DevelopmentDiagnostics.log("windowActivation.finderTab.cycleFailed", [
            "windowID": window.id,
            "hostWindowID": host.windowID,
            "attemptCount": maximumAttempts
        ])
        return false
    }

    private func postKeyboardShortcut(
        to processIdentifier: Int32,
        shortcut: KeyboardShortcut
    ) -> Bool {
        let source = CGEventSource(stateID: .combinedSessionState)
        guard let keyDown = CGEvent(
            keyboardEventSource: source,
            virtualKey: shortcut.keyCode,
            keyDown: true
        ),
              let keyUp = CGEvent(
                keyboardEventSource: source,
                virtualKey: shortcut.keyCode,
                keyDown: false
              )
        else {
            return false
        }

        keyDown.flags = shortcut.flags
        keyUp.flags = shortcut.flags
        keyDown.postToPid(processIdentifier)
        keyUp.postToPid(processIdentifier)
        return true
    }

    private func axChildren(of element: AXUIElement) -> [AXUIElement] {
        var value: CFTypeRef?
        guard AXUIElementCopyAttributeValue(element, kAXChildrenAttribute as CFString, &value) == .success,
              let children = value as? [AXUIElement]
        else {
            return []
        }

        return children
    }

    private func axStringAttribute(_ attribute: String, for element: AXUIElement) -> String? {
        var value: CFTypeRef?
        guard AXUIElementCopyAttributeValue(element, attribute as CFString, &value) == .success,
              let value
        else {
            return nil
        }

        return value as? String
    }

    private func axElementAttribute(_ attribute: String, for element: AXUIElement) -> AXUIElement? {
        var value: CFTypeRef?
        guard AXUIElementCopyAttributeValue(element, attribute as CFString, &value) == .success,
              let value,
              CFGetTypeID(value) == AXUIElementGetTypeID()
        else {
            return nil
        }

        return (value as! AXUIElement)
    }

    private func frameOverlapScore(_ lhs: CGRect?, _ rhs: CGRect?) -> CGFloat? {
        guard let lhs,
              let rhs,
              !lhs.isEmpty,
              !rhs.isEmpty
        else {
            return nil
        }

        let intersection = lhs.intersection(rhs)
        guard !intersection.isNull,
              !intersection.isEmpty
        else {
            return nil
        }

        let denominator = min(lhs.width * lhs.height, rhs.width * rhs.height)
        guard denominator > 0 else { return nil }
        let overlap = (intersection.width * intersection.height) / denominator
        let widthSimilarity = min(lhs.width, rhs.width) / max(lhs.width, rhs.width)
        let heightSimilarity = min(lhs.height, rhs.height) / max(lhs.height, rhs.height)
        let sizeSimilarity = min(widthSimilarity, heightSimilarity)
        guard sizeSimilarity >= 0.80 else { return nil }
        return min(overlap, sizeSimilarity)
    }

    private func cgWindowFingerprint(for window: AlignerWindow) -> AXWindowFingerprint? {
        guard let rawWindows = CGWindowListCopyWindowInfo(
            [.optionIncludingWindow],
@@ -475,6 +1306,37 @@
            title: normalizedWindowTitle(title(rawWindow: rawWindow, axWindow: nil)),
            size: bounds(rawWindow[kCGWindowBounds as String]).size
        )
    }

    private func axWindowGeometryFingerprint(for window: AlignerWindow) -> AXWindowGeometryFingerprint? {
        guard let processIdentifier = window.app.processIdentifier else { return nil }
        let frame = matchingFrame(for: window)
        return AXWindowGeometryFingerprint(
            processIdentifier: processIdentifier,
            title: normalizedWindowTitle(window.title),
            frame: frame
        )
    }

    private func cgWindowFrame(for window: AlignerWindow) -> CGRect? {
        guard let rawWindows = CGWindowListCopyWindowInfo(
            [.optionIncludingWindow],
            CGWindowID(window.id)
        ) as? [[String: Any]],
              let rawWindow = rawWindows.first
        else {
            return nil
        }

        return bounds(rawWindow[kCGWindowBounds as String])
    }

    private func matchingFrame(for window: AlignerWindow) -> CGRect? {
        if isFinderCGOnlyPageCandidate(window) {
            return window.frame ?? cgWindowFrame(for: window)
        }

        return cgWindowFrame(for: window) ?? window.frame
    }

    private func matchingAXTitleCandidateCount(
@@ -765,7 +1627,31 @@
        }

        restorableAXWindowsByID = nextRestorableAXWindowsByID
        return cgRecords + axOnlyRecords
        let records = cgRecords + axOnlyRecords
        let attributedRecords = FinderTabSpaceAttributionPolicy.attributedRecords(records)
        DevelopmentDiagnostics.log("windowEnumeration.finderTabSpaceAttribution", [
            "finderNoSpaceCandidateCount": records.filter { record in
                record.app.bundleIdentifier == "com.apple.finder"
                    && record.identifierSource == .cgWindow
                    && record.spaceIDs.isEmpty
                    && !record.title.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
                    && record.frame?.isEmpty == false
            }.count,
            "finderFullscreenHostCount": records.filter { record in
                record.app.bundleIdentifier == "com.apple.finder"
                    && record.isFullscreen
                    && !record.spaceIDs.isEmpty
                    && record.subrole == .standard
                    && record.frame?.isEmpty == false
            }.count,
            "attributedCount": zip(records, attributedRecords).filter { before, after in
                before.spaceIDs.isEmpty && !after.spaceIDs.isEmpty
            }.count,
            "attributedWindowIDs": zip(records, attributedRecords).compactMap { before, after in
                before.spaceIDs.isEmpty && !after.spaceIDs.isEmpty ? after.id : nil
            }
        ])
        return attributedRecords
    }

    private func app(
@@ -984,6 +1870,13 @@
        }
    }

    private static let commandWVirtualKeyCode: CGKeyCode = 13
    private static let rightBracketVirtualKeyCode: CGKeyCode = 30
    private static let tabVirtualKeyCode: CGKeyCode = 48
    private static let finderNextTabShortcuts: [KeyboardShortcut] = [
        KeyboardShortcut(name: "controlTab", keyCode: tabVirtualKeyCode, flags: .maskControl),
        KeyboardShortcut(name: "commandShiftRightBracket", keyCode: rightBracketVirtualKeyCode, flags: [.maskCommand, .maskShift])
    ]
}

private struct AXWindowMetadata {
@@ -1053,6 +1946,34 @@
    }
}

private struct AXWindowGeometryFingerprint: Hashable {
    let processIdentifier: Int32
    let title: String
    let x: Int
    let y: Int
    let width: Int
    let height: Int

    init?(processIdentifier: Int32, title: String, frame: CGRect?) {
        guard let frame else { return nil }

        self.processIdentifier = processIdentifier
        self.title = title
        self.x = Int(frame.origin.x.rounded())
        self.y = Int(frame.origin.y.rounded())
        self.width = Int(frame.size.width.rounded())
        self.height = Int(frame.size.height.rounded())
    }

    init?(_ metadata: AXWindowMetadata) {
        self.init(
            processIdentifier: metadata.processIdentifier,
            title: normalizedWindowTitle(metadata.title ?? ""),
            frame: metadata.frame
        )
    }
}

private struct RestorableAXWindow {
    let processIdentifier: Int32
    let element: AXUIElement