evidence: PR #6368 native keyboard journey

Publish the sanitized exact-head receipt, MP4, AX snapshots, cleanup record, and causal native mutant needed for inspectable review.

Signed-off-by: Thomas Petersen <thomasp@squareup.com>

pr-6368-native-evidence/MANIFEST.sha256

@@ -0,0 +1,23 @@
+23d329e23dfb7fc3a1710af8f29ae44a79896ea6958a5c212ad7e9201aaa5d38  README.md
+ebb0a53f87a1e71708510937462b1e927c8ce6d9256c24ef299ccdabea776901  cleanup.txt
+a60139a0b5918cec82e63d49c9377091b98c466a3fa56ee4a5eb90da189900e7  environment.txt
+36690b6554077cfea3f30aace8b7bd9dbc738a26dd6f9267f758f73379436591  exact-adjacent.json
+1e590f5113181a330d7a02e019f039fc18e001c952cd1cf70864c5d75937b39b  exact-diagnostics.log
+12761900cf63596841eaf546778eeabea80573744e2fa2003221544e1ee07ac2  exact-focus-crop.png
+dc99f878a4802783d45b2ca2eeca3faeb71bce3420960d3c64228ea1778d04e4  exact-focused.json
+2c39cd7fff5a2c37f15fd451e780359ce1b9aeeda130d74cad0b3a11bd6c40bb  exact-journey.mp4
+9e3934e6e67a1aa09ddb100f2365f5869bd317369f64b6185852e11f456a171f  exact-receipt.json
+484533763f9650aa381aff7c51ddc8dd826eddb1df019690b51e084f6b2db072  exact-selected-crop.png
+1919e6d1ad9c769cd6c41fb4a225b53f01ad1e500e04ff76fc3e75d3d19bf802  exact-selected.json
+36690b6554077cfea3f30aace8b7bd9dbc738a26dd6f9267f758f73379436591  mutant-adjacent.json
+8bc29f598afe4a34d0902574b9863c8b4a2a2bf79a762a9721ecb47c7cbb0518  mutant-diagnostics.log
+fec3651b16e5abc0852d1ec04dcfb167a42887fbdfbfb713897818b529f1938d  mutant-focus-crop.png
+dc99f878a4802783d45b2ca2eeca3faeb71bce3420960d3c64228ea1778d04e4  mutant-focused.json
+3f0a5d2fc4182d7e966e4ee62a8aacece16180f6a10f5bb0d7606a96dff9de10  mutant-receipt.json
+8070b9f873a0f49ccea41765b2dbca30df52a4ece47e6e2b29635b09094ee534  mutant.patch
+e3784c2a95178b30fe8580d89d4c164b0a11a66fc3db3b09fc018af22219469f  native_journey.swift
+06d5865e68cb0085649934a4103df853e5fc305063d81f26485bf2acec0c7481  restored-adjacent.json
+005aeada458090833df23d95e86082cf321c0d0dfb28a31cfb5dc94cfbc8a013  restored-diagnostics.log
+dcd1a3efe372f5d5bb7ff412a4a59fa3b444c3d6ef850fa64660ec1b792f6794  restored-focused.json
+332105d66ccd3b5db46ca2fd54d25492abf71bb3b801603d95b396c4a5305b3d  restored-receipt.json
+ddbb9a48ae499c31e571fcafde2d37e1b795203e2303a61708c1c3c7cf89d848  restored-selected.json

pr-6368-native-evidence/README.md

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+# PR #6368 native keyboard evidence (sanitized public bundle)
+
+Exact head: `ffb765e49e2db60fdb167fe58440f3c6d5efa17b`.
+
+The native Tauri/WKWebView harness focused the adjacent row action, delivered macOS Tab (`key code 48`), asserted an entity-specific focused `AXCheckBox`, measured 732 bright focus-ring pixels, delivered Space (`key code 49`), and asserted checkbox value `1`, heading `1 task`, and `Clear selection`.
+
+`exact-journey.mp4` is the complete 30-second interaction timeline cropped to the checkbox region so no workspace content is published on this public OSS PR. `exact-focus-crop.png` and `exact-selected-crop.png` show the focused and selected pixels. Semantic snapshots preserve the entity-specific `Open task` / `Select` prefixes while redacting the fixture title.
+
+The feature-specific `mutant.patch` removes only `group-focus-within:opacity-100`. The same native harness then exited `1`: Tab still reached the named AX checkbox, but the visual measurement fell from 732 to 0 pixels. Restoring the class returned the harness to exit `0` and 732 pixels.
+
+Artifacts:
+- exact, mutant, and restored receipts plus AX snapshots
+- exact, mutant, and restored step diagnostics
+- native harness source and feature-specific mutant patch
+- sanitized MP4 and focus/selected/mutant crops
+- environment/isolation and cleanup records
+- SHA-256 manifest

pr-6368-native-evidence/cleanup.txt

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+Cleanup command: TERM process group 84227
+Native launcher completion: observed
+
+PASS app process group exited
+PASS Vite port 30355 released
+PASS no worktree agent sidecars remain
+
+Post-cleanup HEAD: ffb765e49e2db60fdb167fe58440f3c6d5efa17b
+Post-cleanup git status: clean
+Post-cleanup git diff --check: pass

pr-6368-native-evidence/environment.txt

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+PR: block/buzz#6368
+HEAD: ffb765e49e2db60fdb167fe58440f3c6d5efa17b
+Branch: projects-v6-pt2-selectable-workspaces
+Pre-run git status: clean
+Pre-run git diff --check: pass
+Application: Buzz Dev (projects-v6-pt2-selectable-workspaces)
+Application identifier: xyz.block.buzz.app.dev.projects-v6-pt2-selectable-workspaces
+Launch command: BUZZ_SHARE_IDENTITY=1 just production
+Vite port: 30355
+Binary SHA-256: 1600d8d63cfca8942e7d809879ccd3738b3fc04239839f87be27ee6fd4ec9f4f
+OS: macOS 26.6.1 (25G76)
+Architecture: arm64
+Display: 2560x1440 points, scale 2.0
+Isolation: worktree-specific app identifier and Vite port; mutant restored before cleanup.
+Publication note: full-screen artifacts remain local because this is a public OSS PR. Published crops, MP4, and semantic records redact workspace content without altering checkbox pixels or harness results.

pr-6368-native-evidence/exact-adjacent.json

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+{
+  "description": "",
+  "focused": true,
+  "position": [
+    317,
+    224
+  ],
+  "role": "AXButton",
+  "size": [
+    1921,
+    40
+  ],
+  "title": "Open task [redacted fixture title]",
+  "value": ""
+}

pr-6368-native-evidence/exact-diagnostics.log

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+[2026-08-20T11:58:25Z] application=Buzz Dev (projects-v6-pt2-selectable-workspaces) pid=84587 windowId=29941 mode=exact
+[2026-08-20T11:58:25Z] AXPress Projects
+[2026-08-20T11:58:26Z] AXPress Tasks
+[2026-08-20T11:58:26Z] AXPress List layout
+[2026-08-20T11:58:27Z] focused setup control Open task [redacted fixture title]
+[2026-08-20T11:58:28Z] posted macOS HID Tab
+[2026-08-20T11:58:30Z] focus-ring bright pixels=732
+[2026-08-20T11:58:30Z] posted macOS HID Space
+[2026-08-20T11:58:31Z] PASS native Tab → entity checkbox → visible focus ring → Space selection

pr-6368-native-evidence/exact-focused.json

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+{
+  "description": "Select [redacted fixture title]",
+  "focused": true,
+  "position": [
+    335,
+    238
+  ],
+  "role": "AXCheckBox",
+  "size": [
+    12,
+    12
+  ],
+  "title": "Select [redacted fixture title]",
+  "value": "0"
+}

pr-6368-native-evidence/exact-receipt.json

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+{
+  "adjacentControl": {
+    "description": "",
+    "focused": true,
+    "position": [
+      317,
+      224
+    ],
+    "role": "AXButton",
+    "size": [
+      1921,
+      40
+    ],
+    "title": "Open task [redacted fixture title]",
+    "value": ""
+  },
+  "applicationTitle": "Buzz Dev (projects-v6-pt2-selectable-workspaces)",
+  "clearSelectionFound": true,
+  "focusRingBrightPixels": 732,
+  "focusedCheckbox": {
+    "description": "Select [redacted fixture title]",
+    "focused": true,
+    "position": [
+      335,
+      238
+    ],
+    "role": "AXCheckBox",
+    "size": [
+      12,
+      12
+    ],
+    "title": "Select [redacted fixture title]",
+    "value": "0"
+  },
+  "mode": "exact",
+  "pid": 84587,
+  "selectedCheckbox": {
+    "description": "Select [redacted fixture title]",
+    "focused": true,
+    "position": [
+      335,
+      238
+    ],
+    "role": "AXCheckBox",
+    "size": [
+      12,
+      12
+    ],
+    "title": "Select [redacted fixture title]",
+    "value": "1"
+  },
+  "selectedHeadingFound": true,
+  "status": "passed",
+  "windowId": 29941
+}

pr-6368-native-evidence/exact-selected.json

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+{
+  "description": "Select [redacted fixture title]",
+  "focused": true,
+  "position": [
+    335,
+    238
+  ],
+  "role": "AXCheckBox",
+  "size": [
+    12,
+    12
+  ],
+  "title": "Select [redacted fixture title]",
+  "value": "1"
+}

pr-6368-native-evidence/mutant-adjacent.json

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+{
+  "description": "",
+  "focused": true,
+  "position": [
+    317,
+    224
+  ],
+  "role": "AXButton",
+  "size": [
+    1921,
+    40
+  ],
+  "title": "Open task [redacted fixture title]",
+  "value": ""
+}

pr-6368-native-evidence/mutant-diagnostics.log

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+[2026-08-20T12:09:37Z] application=Buzz Dev (projects-v6-pt2-selectable-workspaces) pid=84587 windowId=29941 mode=mutant
+[2026-08-20T12:09:37Z] AXPress Projects
+[2026-08-20T12:09:38Z] AXPress Tasks
+[2026-08-20T12:09:39Z] AXPress List layout
+[2026-08-20T12:09:40Z] focused setup control Open task [redacted fixture title]
+[2026-08-20T12:09:41Z] posted macOS HID Tab
+[2026-08-20T12:09:43Z] focus-ring bright pixels=0
+[2026-08-20T12:09:43Z] FAIL visible focus-ring assertion failed: expected >=100 bright pixels, got 0
+Exit status: 1

pr-6368-native-evidence/mutant-focused.json

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+{
+  "description": "Select [redacted fixture title]",
+  "focused": true,
+  "position": [
+    335,
+    238
+  ],
+  "role": "AXCheckBox",
+  "size": [
+    12,
+    12
+  ],
+  "title": "Select [redacted fixture title]",
+  "value": "0"
+}

pr-6368-native-evidence/mutant-receipt.json

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+{
+  "adjacentControl": {
+    "description": "",
+    "focused": true,
+    "position": [
+      317,
+      224
+    ],
+    "role": "AXButton",
+    "size": [
+      1921,
+      40
+    ],
+    "title": "Open task [redacted fixture title]",
+    "value": ""
+  },
+  "applicationTitle": "Buzz Dev (projects-v6-pt2-selectable-workspaces)",
+  "clearSelectionFound": false,
+  "failure": "visible focus-ring assertion failed: expected >=100 bright pixels, got 0",
+  "focusRingBrightPixels": 0,
+  "focusedCheckbox": {
+    "description": "Select [redacted fixture title]",
+    "focused": true,
+    "position": [
+      335,
+      238
+    ],
+    "role": "AXCheckBox",
+    "size": [
+      12,
+      12
+    ],
+    "title": "Select [redacted fixture title]",
+    "value": "0"
+  },
+  "mode": "mutant",
+  "pid": 84587,
+  "selectedHeadingFound": false,
+  "status": "failed",
+  "windowId": 29941
+}

pr-6368-native-evidence/mutant.patch

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+diff --git a/desktop/src/features/projects/ui/ProjectEntityListRow.tsx b/desktop/src/features/projects/ui/ProjectEntityListRow.tsx
+--- a/desktop/src/features/projects/ui/ProjectEntityListRow.tsx
++++ b/desktop/src/features/projects/ui/ProjectEntityListRow.tsx
+@@
+-              "absolute inset-0 flex items-center justify-center opacity-0 group-hover:opacity-100 group-focus-within:opacity-100",
++              "absolute inset-0 flex items-center justify-center opacity-0 group-hover:opacity-100",

pr-6368-native-evidence/native_journey.swift

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+import AppKit
+import ApplicationServices
+import CoreGraphics
+import Foundation
+import ImageIO
+import UniformTypeIdentifiers
+
+struct Snapshot: Codable {
+    let role: String
+    let title: String
+    let description: String
+    let value: String
+    let focused: Bool
+    let position: [Double]
+    let size: [Double]
+}
+
+struct Receipt: Codable {
+    let status: String
+    let mode: String
+    let pid: Int32
+    let applicationTitle: String
+    let windowId: Int
+    let adjacentControl: Snapshot
+    let focusedCheckbox: Snapshot
+    let focusRingBrightPixels: Int
+    let selectedCheckbox: Snapshot?
+    let selectedHeadingFound: Bool
+    let clearSelectionFound: Bool
+    let failure: String?
+}
+
+enum HarnessError: Error, CustomStringConvertible {
+    case message(String)
+
+    var description: String {
+        switch self {
+        case let .message(message):
+            return message
+        }
+    }
+}
+
+let arguments = CommandLine.arguments
+guard arguments.count == 4, let pid = Int32(arguments[1]) else {
+    fputs("usage: native_journey.swift <pid> <output-directory> <mode>\n", stderr)
+    exit(2)
+}
+
+let outputDirectory = URL(fileURLWithPath: arguments[2], isDirectory: true)
+let mode = arguments[3]
+let application = AXUIElementCreateApplication(pid)
+let encoder = JSONEncoder()
+encoder.outputFormatting = [.prettyPrinted, .sortedKeys, .withoutEscapingSlashes]
+
+func timestamp() -> String {
+    ISO8601DateFormatter().string(from: Date())
+}
+
+func diagnostic(_ message: String) {
+    print("[\(timestamp())] \(message)")
+    fflush(stdout)
+}
+
+func attribute(_ element: AXUIElement, _ name: String) -> AnyObject? {
+    var result: CFTypeRef?
+    guard AXUIElementCopyAttributeValue(element, name as CFString, &result) == .success else {
+        return nil
+    }
+    return result as AnyObject?
+}
+
+func stringAttribute(_ element: AXUIElement, _ name: String) -> String {
+    attribute(element, name) as? String ?? ""
+}
+
+func boolAttribute(_ element: AXUIElement, _ name: String) -> Bool {
+    attribute(element, name) as? Bool ?? false
+}
+
+func pointAttribute(_ element: AXUIElement, _ name: String) -> CGPoint {
+    guard let rawValue = attribute(element, name) else {
+        return .zero
+    }
+    let value = rawValue as! AXValue
+    var point = CGPoint.zero
+    AXValueGetValue(value, .cgPoint, &point)
+    return point
+}
+
+func sizeAttribute(_ element: AXUIElement, _ name: String) -> CGSize {
+    guard let rawValue = attribute(element, name) else {
+        return .zero
+    }
+    let value = rawValue as! AXValue
+    var size = CGSize.zero
+    AXValueGetValue(value, .cgSize, &size)
+    return size
+}
+
+func snapshot(_ element: AXUIElement) -> Snapshot {
+    let position = pointAttribute(element, kAXPositionAttribute)
+    let size = sizeAttribute(element, kAXSizeAttribute)
+    return Snapshot(
+        role: stringAttribute(element, kAXRoleAttribute),
+        title: stringAttribute(element, kAXTitleAttribute),
+        description: stringAttribute(element, kAXDescriptionAttribute),
+        value: String(describing: attribute(element, kAXValueAttribute) ?? "" as AnyObject),
+        focused: boolAttribute(element, kAXFocusedAttribute),
+        position: [position.x, position.y],
+        size: [size.width, size.height]
+    )
+}
+
+func children(_ element: AXUIElement) -> [AXUIElement] {
+    attribute(element, kAXChildrenAttribute) as? [AXUIElement] ?? []
+}
+
+func find(
+    _ element: AXUIElement,
+    role: String? = nil,
+    title: String? = nil,
+    titlePrefix: String? = nil,
+    focused: Bool? = nil
+) -> AXUIElement? {
+    let elementRole = stringAttribute(element, kAXRoleAttribute)
+    let elementTitle = stringAttribute(element, kAXTitleAttribute)
+    let matches =
+        (role == nil || elementRole == role) &&
+        (title == nil || elementTitle == title) &&
+        (titlePrefix == nil || elementTitle.hasPrefix(titlePrefix ?? "")) &&
+        (focused == nil || boolAttribute(element, kAXFocusedAttribute) == focused)
+    if matches {
+        return element
+    }
+    for child in children(element) {
+        if let match = find(
+            child,
+            role: role,
+            title: title,
+            titlePrefix: titlePrefix,
+            focused: focused
+        ) {
+            return match
+        }
+    }
+    return nil
+}
+
+func waitFor(
+    role: String? = nil,
+    title: String? = nil,
+    titlePrefix: String? = nil,
+    focused: Bool? = nil,
+    timeout: TimeInterval = 12
+) throws -> AXUIElement {
+    let deadline = Date().addingTimeInterval(timeout)
+    repeat {
+        if let match = find(
+            application,
+            role: role,
+            title: title,
+            titlePrefix: titlePrefix,
+            focused: focused
+        ) {
+            return match
+        }
+        Thread.sleep(forTimeInterval: 0.2)
+    } while Date() < deadline
+    throw HarnessError.message(
+        "timed out waiting for role=\(role ?? "*") title=\(title ?? titlePrefix ?? "*") focused=\(String(describing: focused))"
+    )
+}
+
+func press(_ element: AXUIElement, label: String) throws {
+    let result = AXUIElementPerformAction(element, kAXPressAction as CFString)
+    guard result == .success else {
+        throw HarnessError.message("AXPress failed for \(label): \(result.rawValue)")
+    }
+    diagnostic("AXPress \(label)")
+    Thread.sleep(forTimeInterval: 0.7)
+}
+
+func focus(_ element: AXUIElement, label: String) throws {
+    let result = AXUIElementSetAttributeValue(
+        element,
+        kAXFocusedAttribute as CFString,
+        kCFBooleanTrue
+    )
+    guard result == .success else {
+        throw HarnessError.message("AX focus failed for \(label): \(result.rawValue)")
+    }
+    diagnostic("focused setup control \(label)")
+    Thread.sleep(forTimeInterval: 0.8)
+}
+
+func key(_ virtualKey: CGKeyCode, label: String) throws {
+    let process = Process()
+    process.executableURL = URL(fileURLWithPath: "/usr/bin/osascript")
+    process.arguments = [
+        "-e", "tell application \"System Events\"",
+        "-e", "set frontmost of first application process whose unix id is \(pid) to true",
+        "-e", "key code \(virtualKey)",
+        "-e", "end tell",
+    ]
+    try process.run()
+    process.waitUntilExit()
+    guard process.terminationStatus == 0 else {
+        throw HarnessError.message(
+            "osascript could not deliver \(label): \(process.terminationStatus)"
+        )
+    }
+    diagnostic("posted macOS HID \(label)")
+    Thread.sleep(forTimeInterval: 1.2)
+}
+
+func writeJSON<T: Encodable>(_ value: T, to name: String) throws {
+    try encoder.encode(value).write(to: outputDirectory.appendingPathComponent(name))
+}
+
+func windowId() throws -> Int {
+    let windows =
+        CGWindowListCopyWindowInfo([.optionOnScreenOnly, .excludeDesktopElements], kCGNullWindowID)
+        as? [[String: Any]] ?? []
+    for window in windows where window[kCGWindowOwnerPID as String] as? Int32 == pid {
+        if let number = window[kCGWindowNumber as String] as? Int {
+            return number
+        }
+    }
+    throw HarnessError.message("no onscreen window found for pid \(pid)")
+}
+
+func captureScreen(to url: URL) throws -> CGImage {
+    let process = Process()
+    process.executableURL = URL(fileURLWithPath: "/usr/sbin/screencapture")
+    process.arguments = ["-x", "-D1", url.path]
+    try process.run()
+    process.waitUntilExit()
+    guard process.terminationStatus == 0 else {
+        throw HarnessError.message("screencapture failed with \(process.terminationStatus)")
+    }
+    guard
+        let source = CGImageSourceCreateWithURL(url as CFURL, nil),
+        let image = CGImageSourceCreateImageAtIndex(source, 0, nil)
+    else {
+        throw HarnessError.message("could not decode screenshot \(url.path)")
+    }
+    return image
+}
+
+func writePNG(_ image: CGImage, to url: URL) throws {
+    guard
+        let destination = CGImageDestinationCreateWithURL(
+            url as CFURL,
+            UTType.png.identifier as CFString,
+            1,
+            nil
+        )
+    else {
+        throw HarnessError.message("could not create PNG destination \(url.path)")
+    }
+    CGImageDestinationAddImage(destination, image, nil)
+    guard CGImageDestinationFinalize(destination) else {
+        throw HarnessError.message("could not write PNG \(url.path)")
+    }
+}
+
+func brightPixelCount(around element: AXUIElement, screenshot: CGImage) throws -> Int {
+    let position = pointAttribute(element, kAXPositionAttribute)
+    let size = sizeAttribute(element, kAXSizeAttribute)
+    let displayBounds = CGDisplayBounds(CGMainDisplayID())
+    let scale = Double(screenshot.width) / displayBounds.width
+    let padding = 6.0
+    let rect = CGRect(
+        x: (position.x - displayBounds.origin.x - padding) * scale,
+        y: (position.y - displayBounds.origin.y - padding) * scale,
+        width: (size.width + padding * 2) * scale,
+        height: (size.height + padding * 2) * scale
+    ).integral
+    guard let crop = screenshot.cropping(to: rect) else {
+        throw HarnessError.message("could not crop checkbox at \(rect)")
+    }
+    try writePNG(crop, to: outputDirectory.appendingPathComponent("\(mode)-focus-crop.png"))
+
+    let width = crop.width
+    let height = crop.height
+    var pixels = [UInt8](repeating: 0, count: width * height * 4)
+    guard
+        let context = CGContext(
+            data: &pixels,
+            width: width,
+            height: height,
+            bitsPerComponent: 8,
+            bytesPerRow: width * 4,
+            space: CGColorSpaceCreateDeviceRGB(),
+            bitmapInfo: CGImageAlphaInfo.premultipliedLast.rawValue
+        )
+    else {
+        throw HarnessError.message("could not create pixel-analysis context")
+    }
+    context.draw(crop, in: CGRect(x: 0, y: 0, width: width, height: height))
+    var count = 0
+    for index in stride(from: 0, to: pixels.count, by: 4) {
+        let red = Int(pixels[index])
+        let green = Int(pixels[index + 1])
+        let blue = Int(pixels[index + 2])
+        if max(red, green, blue) >= 150 {
+            count += 1
+        }
+    }
+    return count
+}
+
+func writeFailure(_ message: String, adjacent: Snapshot?, focused: Snapshot?, bright: Int?) {
+    let receipt = Receipt(
+        status: "failed",
+        mode: mode,
+        pid: pid,
+        applicationTitle: stringAttribute(application, kAXTitleAttribute),
+        windowId: (try? windowId()) ?? 0,
+        adjacentControl: adjacent ?? Snapshot(
+            role: "",
+            title: "",
+            description: "",
+            value: "",
+            focused: false,
+            position: [],
+            size: []
+        ),
+        focusedCheckbox: focused ?? Snapshot(
+            role: "",
+            title: "",
+            description: "",
+            value: "",
+            focused: false,
+            position: [],
+            size: []
+        ),
+        focusRingBrightPixels: bright ?? 0,
+        selectedCheckbox: nil,
+        selectedHeadingFound: false,
+        clearSelectionFound: false,
+        failure: message
+    )
+    try? writeJSON(receipt, to: "\(mode)-receipt.json")
+}
+
+var adjacentSnapshot: Snapshot?
+var focusedSnapshot: Snapshot?
+var measuredBrightPixels: Int?
+
+do {
+    try FileManager.default.createDirectory(
+        at: outputDirectory,
+        withIntermediateDirectories: true
+    )
+    let appTitle = stringAttribute(application, kAXTitleAttribute)
+    guard appTitle == "Buzz Dev (projects-v6-pt2-selectable-workspaces)" else {
+        throw HarnessError.message("unexpected application title: \(appTitle)")
+    }
+    let nativeWindowId = try windowId()
+    diagnostic("application=\(appTitle) pid=\(pid) windowId=\(nativeWindowId) mode=\(mode)")
+
+    let projects = try waitFor(role: kAXButtonRole as String, title: "Projects")
+    try press(projects, label: "Projects")
+    let tasks = try waitFor(role: kAXCheckBoxRole as String, title: "Tasks")
+    try press(tasks, label: "Tasks")
+    let listLayout = try waitFor(role: kAXCheckBoxRole as String, title: "List layout")
+    try press(listLayout, label: "List layout")
+
+    if let clearSelection = find(application, role: kAXButtonRole as String, title: "Clear selection") {
+        try press(clearSelection, label: "Clear selection")
+    }
+
+    let adjacent = try waitFor(role: kAXButtonRole as String, titlePrefix: "Open task ")
+    try focus(adjacent, label: stringAttribute(adjacent, kAXTitleAttribute))
+    adjacentSnapshot = snapshot(adjacent)
+    try writeJSON(adjacentSnapshot, to: "\(mode)-adjacent.json")
+
+    try key(48, label: "Tab")
+    let focused = try waitFor(role: kAXCheckBoxRole as String, focused: true)
+    focusedSnapshot = snapshot(focused)
+    try writeJSON(focusedSnapshot, to: "\(mode)-focused.json")
+    guard focusedSnapshot?.title.hasPrefix("Select ") == true else {
+        throw HarnessError.message("Tab did not reach an entity-specific checkbox")
+    }
+    guard focusedSnapshot?.value == "0" else {
+        throw HarnessError.message("focused checkbox did not start unchecked")
+    }
+
+    let focusedScreen = try captureScreen(
+        to: outputDirectory.appendingPathComponent("\(mode)-focused-screen.png")
+    )
+    let brightPixels = try brightPixelCount(around: focused, screenshot: focusedScreen)
+    measuredBrightPixels = brightPixels
+    diagnostic("focus-ring bright pixels=\(brightPixels)")
+    guard brightPixels >= 100 else {
+        throw HarnessError.message(
+            "visible focus-ring assertion failed: expected >=100 bright pixels, got \(brightPixels)"
+        )
+    }
+
+    try key(49, label: "Space")
+    let selectionDeadline = Date().addingTimeInterval(6)
+    var selected = snapshot(focused)
+    var selectedHeadingFound = false
+    var clearSelectionFound = false
+    repeat {
+        selected = snapshot(focused)
+        selectedHeadingFound =
+            find(application, role: kAXHeadingRole as String, title: "1 task") != nil
+        clearSelectionFound =
+            find(application, role: kAXButtonRole as String, title: "Clear selection") != nil
+        if selected.value == "1", selectedHeadingFound, clearSelectionFound {
+            break
+        }
+        Thread.sleep(forTimeInterval: 0.2)
+    } while Date() < selectionDeadline
+    try writeJSON(selected, to: "\(mode)-selected.json")
+    guard selected.value == "1", selectedHeadingFound, clearSelectionFound else {
+        throw HarnessError.message(
+            "Space did not produce selected checkbox, 1 task heading, and Clear selection"
+        )
+    }
+    _ = try captureScreen(
+        to: outputDirectory.appendingPathComponent("\(mode)-selected-screen.png")
+    )
+
+    let receipt = Receipt(
+        status: "passed",
+        mode: mode,
+        pid: pid,
+        applicationTitle: appTitle,
+        windowId: nativeWindowId,
+        adjacentControl: adjacentSnapshot ?? snapshot(adjacent),
+        focusedCheckbox: focusedSnapshot ?? snapshot(focused),
+        focusRingBrightPixels: brightPixels,
+        selectedCheckbox: selected,
+        selectedHeadingFound: selectedHeadingFound,
+        clearSelectionFound: clearSelectionFound,
+        failure: nil
+    )
+    try writeJSON(receipt, to: "\(mode)-receipt.json")
+    diagnostic("PASS native Tab → entity checkbox → visible focus ring → Space selection")
+} catch {
+    let message = String(describing: error)
+    diagnostic("FAIL \(message)")
+    writeFailure(
+        message,
+        adjacent: adjacentSnapshot,
+        focused: focusedSnapshot,
+        bright: measuredBrightPixels
+    )
+    exit(1)
+}

pr-6368-native-evidence/restored-adjacent.json

@@ -0,0 +1,15 @@
+{
+  "description": "",
+  "focused": true,
+  "position": [
+    317,
+    208
+  ],
+  "role": "AXButton",
+  "size": [
+    1921,
+    40
+  ],
+  "title": "Open task [redacted fixture title]",
+  "value": ""
+}

pr-6368-native-evidence/restored-diagnostics.log

@@ -0,0 +1,10 @@
+[2026-08-20T12:10:02Z] application=Buzz Dev (projects-v6-pt2-selectable-workspaces) pid=84587 windowId=29941 mode=restored
+[2026-08-20T12:10:02Z] AXPress Projects
+[2026-08-20T12:10:03Z] AXPress Tasks
+[2026-08-20T12:10:03Z] AXPress List layout
+[2026-08-20T12:10:04Z] focused setup control Open task [redacted fixture title]
+[2026-08-20T12:10:05Z] posted macOS HID Tab
+[2026-08-20T12:10:07Z] focus-ring bright pixels=732
+[2026-08-20T12:10:07Z] posted macOS HID Space
+[2026-08-20T12:10:08Z] PASS native Tab → entity checkbox → visible focus ring → Space selection
+Exit status: 0

pr-6368-native-evidence/restored-focused.json

@@ -0,0 +1,15 @@
+{
+  "description": "Select [redacted fixture title]",
+  "focused": true,
+  "position": [
+    335,
+    294
+  ],
+  "role": "AXCheckBox",
+  "size": [
+    12,
+    12
+  ],
+  "title": "Select [redacted fixture title]",
+  "value": "0"
+}

pr-6368-native-evidence/restored-receipt.json

@@ -0,0 +1,55 @@
+{
+  "adjacentControl": {
+    "description": "",
+    "focused": true,
+    "position": [
+      317,
+      208
+    ],
+    "role": "AXButton",
+    "size": [
+      1921,
+      40
+    ],
+    "title": "Open task [redacted fixture title]",
+    "value": ""
+  },
+  "applicationTitle": "Buzz Dev (projects-v6-pt2-selectable-workspaces)",
+  "clearSelectionFound": true,
+  "focusRingBrightPixels": 732,
+  "focusedCheckbox": {
+    "description": "Select [redacted fixture title]",
+    "focused": true,
+    "position": [
+      335,
+      294
+    ],
+    "role": "AXCheckBox",
+    "size": [
+      12,
+      12
+    ],
+    "title": "Select [redacted fixture title]",
+    "value": "0"
+  },
+  "mode": "restored",
+  "pid": 84587,
+  "selectedCheckbox": {
+    "description": "Select [redacted fixture title]",
+    "focused": false,
+    "position": [
+      335,
+      294
+    ],
+    "role": "AXCheckBox",
+    "size": [
+      12,
+      12
+    ],
+    "title": "Select [redacted fixture title]",
+    "value": "1"
+  },
+  "selectedHeadingFound": true,
+  "status": "passed",
+  "windowId": 29941
+}

pr-6368-native-evidence/restored-selected.json

@@ -0,0 +1,15 @@
+{
+  "description": "Select [redacted fixture title]",
+  "focused": false,
+  "position": [
+    335,
+    294
+  ],
+  "role": "AXCheckBox",
+  "size": [
+    12,
+    12
+  ],
+  "title": "Select [redacted fixture title]",
+  "value": "1"
+}