diff --git a/apps/macos/Sources/Clawdis/CanvasManager.swift b/apps/macos/Sources/Clawdis/CanvasManager.swift
index c5b60a0d2..3e35eeb25 100644
--- a/apps/macos/Sources/Clawdis/CanvasManager.swift
+++ b/apps/macos/Sources/Clawdis/CanvasManager.swift
@@ -1,11 +1,14 @@
 import AppKit
 import ClawdisIPC
 import Foundation
+import OSLog
 
 @MainActor
 final class CanvasManager {
     static let shared = CanvasManager()
 
+    private static let logger = Logger(subsystem: "com.steipete.clawdis", category: "CanvasManager")
+
     private var panelController: CanvasWindowController?
     private var panelSessionKey: String?
 
@@ -24,6 +27,8 @@ final class CanvasManager {
     }
 
     func showDetailed(sessionKey: String, target: String? = nil, placement: CanvasPlacement? = nil) throws -> CanvasShowResult {
+        Self.logger.debug(
+            "showDetailed start session=\(sessionKey, privacy: .public) target=\(target ?? "", privacy: .public) placement=\(placement != nil)")
         let anchorProvider = self.defaultAnchorProvider ?? Self.mouseAnchorProvider
         let session = sessionKey.trimmingCharacters(in: .whitespacesAndNewlines)
         let normalizedTarget = target?
@@ -31,6 +36,7 @@ final class CanvasManager {
             .nonEmpty
 
         if let controller = self.panelController, self.panelSessionKey == session {
+            Self.logger.debug("showDetailed reuse existing session=\(session, privacy: .public)")
             controller.onVisibilityChanged = { [weak self] visible in
                 self?.onPanelVisibilityChanged?(visible)
             }
@@ -54,15 +60,19 @@ final class CanvasManager {
                 url: nil)
         }
 
+        Self.logger.debug("showDetailed creating new session=\(session, privacy: .public)")
         self.panelController?.close()
         self.panelController = nil
         self.panelSessionKey = nil
 
+        Self.logger.debug("showDetailed ensure canvas root dir")
         try FileManager.default.createDirectory(at: Self.canvasRoot, withIntermediateDirectories: true)
+        Self.logger.debug("showDetailed init CanvasWindowController")
         let controller = try CanvasWindowController(
             sessionKey: session,
             root: Self.canvasRoot,
             presentation: .panel(anchorProvider: anchorProvider))
+        Self.logger.debug("showDetailed CanvasWindowController init done")
         controller.onVisibilityChanged = { [weak self] visible in
             self?.onPanelVisibilityChanged?(visible)
         }
@@ -72,7 +82,9 @@ final class CanvasManager {
 
         // New session: default to "/" so the user sees either the welcome page or `index.html`.
         let effectiveTarget = normalizedTarget ?? "/"
+        Self.logger.debug("showDetailed showCanvas effectiveTarget=\(effectiveTarget, privacy: .public)")
         controller.showCanvas(path: effectiveTarget)
+        Self.logger.debug("showDetailed showCanvas done")
 
         return self.makeShowResult(
             directory: controller.directoryPath,
diff --git a/apps/macos/Sources/Clawdis/CanvasWindow.swift b/apps/macos/Sources/Clawdis/CanvasWindow.swift
index de265d9f2..0d492ed28 100644
--- a/apps/macos/Sources/Clawdis/CanvasWindow.swift
+++ b/apps/macos/Sources/Clawdis/CanvasWindow.swift
@@ -50,18 +50,85 @@ final class CanvasWindowController: NSWindowController, WKNavigationDelegate, NS
         self.root = root
         self.presentation = presentation
 
+        canvasWindowLogger.debug("CanvasWindowController init start session=\(sessionKey, privacy: .public)")
         let safeSessionKey = CanvasWindowController.sanitizeSessionKey(sessionKey)
+        canvasWindowLogger.debug("CanvasWindowController init sanitized session=\(safeSessionKey, privacy: .public)")
         self.sessionDir = root.appendingPathComponent(safeSessionKey, isDirectory: true)
         try FileManager.default.createDirectory(at: self.sessionDir, withIntermediateDirectories: true)
+        canvasWindowLogger.debug("CanvasWindowController init session dir ready")
 
         self.schemeHandler = CanvasSchemeHandler(root: root)
+        canvasWindowLogger.debug("CanvasWindowController init scheme handler ready")
 
         let config = WKWebViewConfiguration()
         config.userContentController = WKUserContentController()
         config.preferences.isElementFullscreenEnabled = true
         config.preferences.setValue(true, forKey: "developerExtrasEnabled")
+        canvasWindowLogger.debug("CanvasWindowController init config ready")
         config.setURLSchemeHandler(self.schemeHandler, forURLScheme: CanvasScheme.scheme)
+        canvasWindowLogger.debug("CanvasWindowController init scheme handler installed")
 
+        // Bridge A2UI "a2uiaction" DOM events back into the native agent loop.
+        //
+        // Prefer WKScriptMessageHandler when WebKit exposes it, otherwise fall back to an unattended deep link
+        // (includes the app-generated key so it won't prompt).
+        canvasWindowLogger.debug("CanvasWindowController init building A2UI bridge script")
+        let deepLinkKey = DeepLinkHandler.currentCanvasKey()
+        let injectedSessionKey = sessionKey.trimmingCharacters(in: .whitespacesAndNewlines).nonEmpty ?? "main"
+        let bridgeScript = """
+        (() => {
+          try {
+            if (location.protocol !== '\(CanvasScheme.scheme):') return;
+            if (globalThis.__clawdisA2UIBridgeInstalled) return;
+            globalThis.__clawdisA2UIBridgeInstalled = true;
+
+            const deepLinkKey = \(Self.jsStringLiteral(deepLinkKey));
+            const sessionKey = \(Self.jsStringLiteral(injectedSessionKey));
+
+            globalThis.addEventListener('a2uiaction', (evt) => {
+              try {
+                const payload = evt?.detail ?? evt?.payload ?? null;
+                if (!payload || payload.eventType !== 'a2ui.action') return;
+
+                const action = payload.action ?? null;
+                const name = action?.name ?? '';
+                if (!name) return;
+
+                const context = Array.isArray(action?.context) ? action.context : [];
+                const userAction = {
+                  name,
+                  surfaceId: payload.surfaceId ?? 'main',
+                  sourceComponentId: payload.sourceComponentId ?? '',
+                  dataContextPath: payload.dataContextPath ?? '',
+                  timestamp: new Date().toISOString(),
+                  ...(context.length ? { context } : {}),
+                };
+
+                const handler = globalThis.webkit?.messageHandlers?.clawdisCanvasA2UIAction;
+                if (handler?.postMessage) {
+                  handler.postMessage({ userAction });
+                  return;
+                }
+
+                const message = 'A2UI action: ' + name + '\\n\\n```json\\n' + JSON.stringify(userAction, null, 2) + '\\n```';
+                const params = new URLSearchParams();
+                params.set('message', message);
+                params.set('sessionKey', sessionKey);
+                params.set('thinking', 'low');
+                params.set('deliver', 'false');
+                params.set('channel', 'last');
+                params.set('key', deepLinkKey);
+                location.href = 'clawdis://agent?' + params.toString();
+              } catch {}
+            }, true);
+          } catch {}
+        })();
+        """
+        config.userContentController.addUserScript(
+            WKUserScript(source: bridgeScript, injectionTime: .atDocumentStart, forMainFrameOnly: true))
+        canvasWindowLogger.debug("CanvasWindowController init A2UI bridge installed")
+
+        canvasWindowLogger.debug("CanvasWindowController init creating WKWebView")
         self.webView = WKWebView(frame: .zero, configuration: config)
         self.webView.setValue(false, forKey: "drawsBackground")
 
@@ -93,6 +160,7 @@ final class CanvasWindowController: NSWindowController, WKNavigationDelegate, NS
 
         self.container = HoverChromeContainerView(containing: self.webView)
         let window = Self.makeWindow(for: presentation, contentView: self.container)
+        canvasWindowLogger.debug("CanvasWindowController init makeWindow done")
         super.init(window: window)
 
         let handler = CanvasA2UIActionMessageHandler(sessionKey: sessionKey)
@@ -106,6 +174,7 @@ final class CanvasWindowController: NSWindowController, WKNavigationDelegate, NS
         }
 
         self.watcher.start()
+        canvasWindowLogger.debug("CanvasWindowController init done")
     }
 
     @available(*, unavailable)
@@ -409,6 +478,17 @@ final class CanvasWindowController: NSWindowController, WKNavigationDelegate, NS
         }
         let scheme = url.scheme?.lowercased()
 
+        // Deep links: allow local Canvas content to invoke the agent without bouncing through NSWorkspace.
+        if scheme == "clawdis" {
+            if self.webView.url?.scheme == CanvasScheme.scheme {
+                Task { await DeepLinkHandler.shared.handle(url: url) }
+            } else {
+                canvasWindowLogger.debug("ignoring deep link from non-canvas page \(url.absoluteString, privacy: .public)")
+            }
+            decisionHandler(.cancel)
+            return
+        }
+
         // Keep web content inside the panel when reasonable.
         // `about:blank` and friends are common internal navigations for WKWebView; never send them to NSWorkspace.
         if scheme == CanvasScheme.scheme
@@ -466,6 +546,11 @@ final class CanvasWindowController: NSWindowController, WKNavigationDelegate, NS
         return String(scalars)
     }
 
+    private static func jsStringLiteral(_ value: String) -> String {
+        let data = try? JSONEncoder().encode(value)
+        return data.flatMap { String(data: $0, encoding: .utf8) } ?? "\"\""
+    }
+
     private static func storedFrameDefaultsKey(sessionKey: String) -> String {
         "clawdis.canvas.frame.\(self.sanitizeSessionKey(sessionKey))"
     }
@@ -504,9 +589,6 @@ private final class CanvasA2UIActionMessageHandler: NSObject, WKScriptMessageHan
               webView.url?.scheme == CanvasScheme.scheme
         else { return }
 
-        let path = webView.url?.path ?? ""
-        guard path == "/" || path.isEmpty || path.hasPrefix("/__clawdis__/a2ui") else { return }
-
         let body: [String: Any] = {
             if let dict = message.body as? [String: Any] { return dict }
             if let dict = message.body as? [AnyHashable: Any] {
diff --git a/apps/macos/Sources/Clawdis/ControlRequestHandler.swift b/apps/macos/Sources/Clawdis/ControlRequestHandler.swift
index e7aba708d..e6e9e4140 100644
--- a/apps/macos/Sources/Clawdis/ControlRequestHandler.swift
+++ b/apps/macos/Sources/Clawdis/ControlRequestHandler.swift
@@ -113,9 +113,7 @@ enum ControlRequestHandler {
                 priority: request.priority)
             return ok ? Response(ok: true) : Response(ok: false, message: "notification not authorized")
         case .overlay:
-            await MainActor.run {
-                NotifyOverlayController.shared.present(title: request.title, body: request.body)
-            }
+            await NotifyOverlayController.shared.present(title: request.title, body: request.body)
             return Response(ok: true)
         case .auto:
             let ok = await notifier.send(
@@ -124,9 +122,7 @@ enum ControlRequestHandler {
                 sound: chosenSound,
                 priority: request.priority)
             if ok { return Response(ok: true) }
-            await MainActor.run {
-                NotifyOverlayController.shared.present(title: request.title, body: request.body)
-            }
+            await NotifyOverlayController.shared.present(title: request.title, body: request.body)
             return Response(ok: true, message: "notification not authorized; used overlay")
         }
     }
@@ -194,28 +190,36 @@ enum ControlRequestHandler {
         placement: CanvasPlacement?) async -> Response
     {
         guard self.canvasEnabled() else { return Response(ok: false, message: "Canvas disabled by user") }
+        let logger = Logger(subsystem: "com.steipete.clawdis", category: "CanvasControl")
+        logger.info("canvas show start session=\(session, privacy: .public) path=\(path ?? "", privacy: .public)")
         do {
-            let res = try await MainActor.run {
-                try CanvasManager.shared.showDetailed(sessionKey: session, target: path, placement: placement)
-            }
+            logger.info("canvas show awaiting CanvasManager")
+            let res = try await CanvasManager.shared.showDetailed(sessionKey: session, target: path, placement: placement)
+            logger.info("canvas show done dir=\(res.directory, privacy: .public) status=\(String(describing: res.status), privacy: .public)")
             let payload = try? JSONEncoder().encode(res)
             return Response(ok: true, message: res.directory, payload: payload)
         } catch {
+            logger.error("canvas show failed \(error.localizedDescription, privacy: .public)")
             return Response(ok: false, message: error.localizedDescription)
         }
     }
 
     private static func handleCanvasHide(session: String) async -> Response {
-        await MainActor.run { CanvasManager.shared.hide(sessionKey: session) }
+        await CanvasManager.shared.hide(sessionKey: session)
         return Response(ok: true)
     }
 
     private static func handleCanvasEval(session: String, javaScript: String) async -> Response {
         guard self.canvasEnabled() else { return Response(ok: false, message: "Canvas disabled by user") }
+        let logger = Logger(subsystem: "com.steipete.clawdis", category: "CanvasControl")
+        logger.info("canvas eval start session=\(session, privacy: .public) bytes=\(javaScript.utf8.count)")
         do {
+            logger.info("canvas eval awaiting CanvasManager.eval")
             let result = try await CanvasManager.shared.eval(sessionKey: session, javaScript: javaScript)
+            logger.info("canvas eval done bytes=\(result.utf8.count)")
             return Response(ok: true, payload: Data(result.utf8))
         } catch {
+            logger.error("canvas eval failed \(error.localizedDescription, privacy: .public)")
             return Response(ok: false, message: error.localizedDescription)
         }
     }
@@ -234,16 +238,12 @@ enum ControlRequestHandler {
         guard self.canvasEnabled() else { return Response(ok: false, message: "Canvas disabled by user") }
         do {
             // Ensure the Canvas is visible without forcing a navigation/reload.
-            _ = try await MainActor.run {
-                try CanvasManager.shared.show(sessionKey: session, path: nil)
-            }
+            _ = try await CanvasManager.shared.show(sessionKey: session, path: nil)
 
             // Wait for the in-page A2UI bridge. If it doesn't appear, force-load the bundled A2UI shell once.
             var ready = await Self.waitForCanvasA2UI(session: session, requireBuiltinPath: false, timeoutMs: 2_000)
             if !ready {
-                _ = try await MainActor.run {
-                    try CanvasManager.shared.show(sessionKey: session, path: "/__clawdis__/a2ui/")
-                }
+                _ = try await CanvasManager.shared.show(sessionKey: session, path: "/__clawdis__/a2ui/")
                 ready = await Self.waitForCanvasA2UI(session: session, requireBuiltinPath: true, timeoutMs: 5_000)
             }
 
diff --git a/apps/macos/Sources/Clawdis/CritterStatusLabel.swift b/apps/macos/Sources/Clawdis/CritterStatusLabel.swift
index feb70b24a..083f11fa2 100644
--- a/apps/macos/Sources/Clawdis/CritterStatusLabel.swift
+++ b/apps/macos/Sources/Clawdis/CritterStatusLabel.swift
@@ -20,7 +20,6 @@ struct CritterStatusLabel: View {
     @State private var nextLegWiggle = Date().addingTimeInterval(Double.random(in: 5.0...11.0))
     @State private var earWiggle: CGFloat = 0
     @State private var nextEarWiggle = Date().addingTimeInterval(Double.random(in: 7.0...14.0))
-    private let ticker = Timer.publish(every: 0.35, on: .main, in: .common).autoconnect()
 
     private var isWorkingNow: Bool {
         self.iconState.isWorking || self.isWorking
@@ -32,34 +31,18 @@ struct CritterStatusLabel: View {
                 .frame(width: 18, height: 18)
                 .rotationEffect(.degrees(self.wiggleAngle), anchor: .center)
                 .offset(x: self.wiggleOffset)
-                .onReceive(self.ticker) { now in
+                // Avoid Combine's TimerPublisher here: on macOS 26.2 we've seen crashes inside executor checks
+                // triggered by its callbacks. Drive periodic updates via a Swift-concurrency task instead.
+                .task(id: self.tickTaskID) {
                     guard self.animationsEnabled, !self.earBoostActive else {
-                        self.resetMotion()
+                        await MainActor.run { self.resetMotion() }
                         return
                     }
 
-                    if now >= self.nextBlink {
-                        self.blink()
-                        self.nextBlink = now.addingTimeInterval(Double.random(in: 3.5...8.5))
-                    }
-
-                    if now >= self.nextWiggle {
-                        self.wiggle()
-                        self.nextWiggle = now.addingTimeInterval(Double.random(in: 6.5...14))
-                    }
-
-                    if now >= self.nextLegWiggle {
-                        self.wiggleLegs()
-                        self.nextLegWiggle = now.addingTimeInterval(Double.random(in: 5.0...11.0))
-                    }
-
-                    if now >= self.nextEarWiggle {
-                        self.wiggleEars()
-                        self.nextEarWiggle = now.addingTimeInterval(Double.random(in: 7.0...14.0))
-                    }
-
-                    if self.isWorkingNow {
-                        self.scurry()
+                    while !Task.isCancelled {
+                        let now = Date()
+                        await MainActor.run { self.tick(now) }
+                        try? await Task.sleep(nanoseconds: 350_000_000)
                     }
                 }
                 .onChange(of: self.isPaused) { _, _ in self.resetMotion() }
@@ -96,6 +79,42 @@ struct CritterStatusLabel: View {
         .frame(width: 18, height: 18)
     }
 
+    private var tickTaskID: Int {
+        // Ensure SwiftUI restarts (and cancels) the task when these change.
+        (self.animationsEnabled ? 1 : 0) | (self.earBoostActive ? 2 : 0)
+    }
+
+    private func tick(_ now: Date) {
+        guard self.animationsEnabled, !self.earBoostActive else {
+            self.resetMotion()
+            return
+        }
+
+        if now >= self.nextBlink {
+            self.blink()
+            self.nextBlink = now.addingTimeInterval(Double.random(in: 3.5...8.5))
+        }
+
+        if now >= self.nextWiggle {
+            self.wiggle()
+            self.nextWiggle = now.addingTimeInterval(Double.random(in: 6.5...14))
+        }
+
+        if now >= self.nextLegWiggle {
+            self.wiggleLegs()
+            self.nextLegWiggle = now.addingTimeInterval(Double.random(in: 5.0...11.0))
+        }
+
+        if now >= self.nextEarWiggle {
+            self.wiggleEars()
+            self.nextEarWiggle = now.addingTimeInterval(Double.random(in: 7.0...14.0))
+        }
+
+        if self.isWorkingNow {
+            self.scurry()
+        }
+    }
+
     private var iconImage: Image {
         let badge: CritterIconRenderer.Badge? = if let prominence = self.iconState.badgeProminence, !self.isPaused {
             CritterIconRenderer.Badge(
@@ -128,7 +147,8 @@ struct CritterStatusLabel: View {
 
     private func blink() {
         withAnimation(.easeInOut(duration: 0.08)) { self.blinkAmount = 1 }
-        DispatchQueue.main.asyncAfter(deadline: .now() + 0.16) {
+        Task { @MainActor in
+            try? await Task.sleep(nanoseconds: 160_000_000)
             withAnimation(.easeOut(duration: 0.12)) { self.blinkAmount = 0 }
         }
     }
@@ -140,7 +160,8 @@ struct CritterStatusLabel: View {
             self.wiggleAngle = targetAngle
             self.wiggleOffset = targetOffset
         }
-        DispatchQueue.main.asyncAfter(deadline: .now() + 0.36) {
+        Task { @MainActor in
+            try? await Task.sleep(nanoseconds: 360_000_000)
             withAnimation(.interpolatingSpring(stiffness: 220, damping: 18)) {
                 self.wiggleAngle = 0
                 self.wiggleOffset = 0
@@ -153,7 +174,8 @@ struct CritterStatusLabel: View {
         withAnimation(.easeInOut(duration: 0.14)) {
             self.legWiggle = target
         }
-        DispatchQueue.main.asyncAfter(deadline: .now() + 0.22) {
+        Task { @MainActor in
+            try? await Task.sleep(nanoseconds: 220_000_000)
             withAnimation(.easeOut(duration: 0.18)) { self.legWiggle = 0 }
         }
     }
@@ -164,7 +186,8 @@ struct CritterStatusLabel: View {
             self.legWiggle = target
             self.wiggleOffset = CGFloat.random(in: -0.6...0.6)
         }
-        DispatchQueue.main.asyncAfter(deadline: .now() + 0.18) {
+        Task { @MainActor in
+            try? await Task.sleep(nanoseconds: 180_000_000)
             withAnimation(.easeOut(duration: 0.16)) {
                 self.legWiggle = 0.25
                 self.wiggleOffset = 0
@@ -177,8 +200,11 @@ struct CritterStatusLabel: View {
         withAnimation(.interpolatingSpring(stiffness: 260, damping: 19)) {
             self.earWiggle = target
         }
-        DispatchQueue.main.asyncAfter(deadline: .now() + 0.32) {
-            withAnimation(.interpolatingSpring(stiffness: 260, damping: 19)) { self.earWiggle = 0 }
+        Task { @MainActor in
+            try? await Task.sleep(nanoseconds: 320_000_000)
+            withAnimation(.interpolatingSpring(stiffness: 260, damping: 19)) {
+                self.earWiggle = 0
+            }
         }
     }
 
diff --git a/apps/macos/Sources/Clawdis/DeepLinks.swift b/apps/macos/Sources/Clawdis/DeepLinks.swift
index aab6dc949..1706d9adb 100644
--- a/apps/macos/Sources/Clawdis/DeepLinks.swift
+++ b/apps/macos/Sources/Clawdis/DeepLinks.swift
@@ -12,6 +12,11 @@ final class DeepLinkHandler {
 
     private var lastPromptAt: Date = .distantPast
 
+    // Ephemeral, in-memory key used for unattended deep links originating from the in-app Canvas.
+    // This avoids blocking Canvas init on UserDefaults and doesn't weaken the external deep-link prompt:
+    // outside callers can't know this randomly generated key.
+    private nonisolated static let canvasUnattendedKey: String = DeepLinkHandler.generateRandomKey()
+
     func handle(url: URL) async {
         guard let route = DeepLinkParser.parse(url) else {
             deepLinkLogger.debug("ignored url \(url.absoluteString, privacy: .public)")
@@ -35,7 +40,7 @@ final class DeepLinkHandler {
             return
         }
 
-        let allowUnattended = link.key == Self.expectedKey()
+        let allowUnattended = link.key == Self.canvasUnattendedKey || link.key == Self.expectedKey()
         if !allowUnattended {
             if Date().timeIntervalSince(self.lastPromptAt) < 1.0 {
                 deepLinkLogger.debug("throttling deep link prompt")
@@ -83,6 +88,10 @@ final class DeepLinkHandler {
         self.expectedKey()
     }
 
+    static func currentCanvasKey() -> String {
+        self.canvasUnattendedKey
+    }
+
     private static func expectedKey() -> String {
         let defaults = UserDefaults.standard
         if let key = defaults.string(forKey: deepLinkKeyKey), !key.isEmpty {
@@ -100,6 +109,17 @@ final class DeepLinkHandler {
         return key
     }
 
+    private nonisolated static func generateRandomKey() -> String {
+        var bytes = [UInt8](repeating: 0, count: 32)
+        _ = SecRandomCopyBytes(kSecRandomDefault, bytes.count, &bytes)
+        let data = Data(bytes)
+        return data
+            .base64EncodedString()
+            .replacingOccurrences(of: "+", with: "-")
+            .replacingOccurrences(of: "/", with: "_")
+            .replacingOccurrences(of: "=", with: "")
+    }
+
     // MARK: - UI
 
     private func confirm(title: String, message: String) -> Bool {
diff --git a/apps/macos/Sources/Clawdis/VoicePushToTalk.swift b/apps/macos/Sources/Clawdis/VoicePushToTalk.swift
index 8e1855169..8f5fbde16 100644
--- a/apps/macos/Sources/Clawdis/VoicePushToTalk.swift
+++ b/apps/macos/Sources/Clawdis/VoicePushToTalk.swift
@@ -1,11 +1,11 @@
 import AppKit
 import AVFoundation
+import Dispatch
 import OSLog
 import Speech
 
 /// Observes right Option and starts a push-to-talk capture while it is held.
-@MainActor
-final class VoicePushToTalkHotkey {
+final class VoicePushToTalkHotkey: @unchecked Sendable {
     static let shared = VoicePushToTalkHotkey()
 
     private var globalMonitor: Any?
@@ -13,29 +13,48 @@ final class VoicePushToTalkHotkey {
     private var optionDown = false // right option only
     private var active = false
 
+    private let beginAction: @Sendable () async -> Void
+    private let endAction: @Sendable () async -> Void
+
+    init(
+        beginAction: @escaping @Sendable () async -> Void = { await VoicePushToTalk.shared.begin() },
+        endAction: @escaping @Sendable () async -> Void = { await VoicePushToTalk.shared.end() }
+    ) {
+        self.beginAction = beginAction
+        self.endAction = endAction
+    }
+
     func setEnabled(_ enabled: Bool) {
-        if enabled {
-            self.startMonitoring()
-        } else {
-            self.stopMonitoring()
+        self.withMainThread { [weak self] in
+            guard let self else { return }
+            if enabled {
+                self.startMonitoring()
+            } else {
+                self.stopMonitoring()
+            }
         }
     }
 
     private func startMonitoring() {
+        assert(Thread.isMainThread)
         guard self.globalMonitor == nil, self.localMonitor == nil else { return }
         // Listen-only global monitor; we rely on Input Monitoring permission to receive events.
         self.globalMonitor = NSEvent.addGlobalMonitorForEvents(matching: .flagsChanged) { [weak self] event in
-            guard let self else { return }
-            self.updateModifierState(from: event)
+            let keyCode = event.keyCode
+            let flags = event.modifierFlags
+            self?.handleFlagsChanged(keyCode: keyCode, modifierFlags: flags)
         }
         // Also listen locally so we still catch events when the app is active/focused.
         self.localMonitor = NSEvent.addLocalMonitorForEvents(matching: .flagsChanged) { [weak self] event in
-            self?.updateModifierState(from: event)
+            let keyCode = event.keyCode
+            let flags = event.modifierFlags
+            self?.handleFlagsChanged(keyCode: keyCode, modifierFlags: flags)
             return event
         }
     }
 
     private func stopMonitoring() {
+        assert(Thread.isMainThread)
         if let globalMonitor {
             NSEvent.removeMonitor(globalMonitor)
             self.globalMonitor = nil
@@ -48,10 +67,25 @@ final class VoicePushToTalkHotkey {
         self.active = false
     }
 
-    private func updateModifierState(from event: NSEvent) {
+    private func handleFlagsChanged(keyCode: UInt16, modifierFlags: NSEvent.ModifierFlags) {
+        self.withMainThread { [weak self] in
+            self?.updateModifierState(keyCode: keyCode, modifierFlags: modifierFlags)
+        }
+    }
+
+    private func withMainThread(_ block: @escaping @Sendable () -> Void) {
+        if Thread.isMainThread {
+            block()
+        } else {
+            DispatchQueue.main.async(execute: block)
+        }
+    }
+
+    private func updateModifierState(keyCode: UInt16, modifierFlags: NSEvent.ModifierFlags) {
+        assert(Thread.isMainThread)
         // Right Option (keyCode 61) acts as a hold-to-talk modifier.
-        if event.keyCode == 61 {
-            self.optionDown = event.modifierFlags.contains(.option)
+        if keyCode == 61 {
+            self.optionDown = modifierFlags.contains(.option)
         }
 
         let chordActive = self.optionDown
@@ -60,17 +94,21 @@ final class VoicePushToTalkHotkey {
             Task {
                 Logger(subsystem: "com.steipete.clawdis", category: "voicewake.ptt")
                     .info("ptt hotkey down")
-                await VoicePushToTalk.shared.begin()
+                await self.beginAction()
             }
         } else if !chordActive, self.active {
             self.active = false
             Task {
                 Logger(subsystem: "com.steipete.clawdis", category: "voicewake.ptt")
                     .info("ptt hotkey up")
-                await VoicePushToTalk.shared.end()
+                await self.endAction()
             }
         }
     }
+
+    func _testUpdateModifierState(keyCode: UInt16, modifierFlags: NSEvent.ModifierFlags) {
+        self.updateModifierState(keyCode: keyCode, modifierFlags: modifierFlags)
+    }
 }
 
 /// Short-lived speech recognizer that records while the hotkey is held.
diff --git a/apps/macos/Tests/ClawdisIPCTests/VoicePushToTalkHotkeyTests.swift b/apps/macos/Tests/ClawdisIPCTests/VoicePushToTalkHotkeyTests.swift
new file mode 100644
index 000000000..1c4fd2ade
--- /dev/null
+++ b/apps/macos/Tests/ClawdisIPCTests/VoicePushToTalkHotkeyTests.swift
@@ -0,0 +1,37 @@
+import AppKit
+import Testing
+@testable import Clawdis
+
+@Suite(.serialized) struct VoicePushToTalkHotkeyTests {
+    actor Counter {
+        private(set) var began = 0
+        private(set) var ended = 0
+
+        func incBegin() { self.began += 1 }
+        func incEnd() { self.ended += 1 }
+        func snapshot() -> (began: Int, ended: Int) { (self.began, self.ended) }
+    }
+
+    @Test func beginEndFiresOncePerHold() async {
+        let counter = Counter()
+        let hotkey = VoicePushToTalkHotkey(
+            beginAction: { await counter.incBegin() },
+            endAction: { await counter.incEnd() })
+
+        await MainActor.run {
+            hotkey._testUpdateModifierState(keyCode: 61, modifierFlags: [.option])
+            hotkey._testUpdateModifierState(keyCode: 61, modifierFlags: [.option])
+            hotkey._testUpdateModifierState(keyCode: 61, modifierFlags: [])
+        }
+
+        for _ in 0..<50 {
+            let snap = await counter.snapshot()
+            if snap.began == 1, snap.ended == 1 { break }
+            try? await Task.sleep(nanoseconds: 10_000_000)
+        }
+
+        let snap = await counter.snapshot()
+        #expect(snap.began == 1)
+        #expect(snap.ended == 1)
+    }
+}
diff --git a/apps/macos/Tests/ClawdisIPCTests/VoiceWakeForwarderTests.swift b/apps/macos/Tests/ClawdisIPCTests/VoiceWakeForwarderTests.swift
index 1307888d5..b585adc40 100644
--- a/apps/macos/Tests/ClawdisIPCTests/VoiceWakeForwarderTests.swift
+++ b/apps/macos/Tests/ClawdisIPCTests/VoiceWakeForwarderTests.swift
@@ -17,6 +17,6 @@ import Testing
         #expect(opts.thinking == "low")
         #expect(opts.deliver == true)
         #expect(opts.to == nil)
-        #expect(opts.channel == "last")
+        #expect(opts.channel == .last)
     }
 }
diff --git a/docs/clawdis-mac.md b/docs/clawdis-mac.md
index 5cf6af67a..fa866a1c6 100644
--- a/docs/clawdis-mac.md
+++ b/docs/clawdis-mac.md
@@ -108,15 +108,15 @@ open 'clawdis://agent?message=Hello%20from%20deep%20link'
 Query parameters:
 - `message` (required): the agent prompt (URL-encoded).
 - `sessionKey` (optional): explicit session key to use.
-- `thinking` (optional): `off|minimal|low|medium|high` (or omit for default).
+- `thinking` (optional): thinking hint (e.g. `low`; omit for default).
 - `deliver` (optional): `true|false` (default: false).
 - `to` / `channel` (optional): forwarded to the Gateway `agent` method (only meaningful with `deliver=true`).
 - `timeoutSeconds` (optional): timeout hint forwarded to the Gateway.
 - `key` (optional): unattended mode key (see below).
 
 Safety/guardrails:
-- Disabled by default; enable in **Clawdis → Settings → Debug** (“Allow URL scheme (agent)”).
-- Without `key`, Clawdis prompts with a confirmation dialog before invoking the agent.
+- Always enabled.
+- Without a `key` query param, the app will prompt for confirmation before invoking the agent.
 - With `key=<value>`, Clawdis runs without prompting (intended for personal automations).
   - The current key is shown in Debug Settings and stored locally in UserDefaults.
 
diff --git a/docs/mac/canvas.md b/docs/mac/canvas.md
index 3ed901746..5e0d8827f 100644
--- a/docs/mac/canvas.md
+++ b/docs/mac/canvas.md
@@ -139,8 +139,9 @@ Implementation note (important):
 - In `WKWebView`, intercept `clawdis://…` navigations in `WKNavigationDelegate` and forward them to the app, e.g. by calling `DeepLinkHandler.shared.handle(url:)` and returning `.cancel` for the navigation.
 
 Safety:
-- `clawdis://agent` is disabled by default and must be enabled in **Clawdis → Settings → Debug** (“Allow URL scheme (agent)”).
+- Deep links (`clawdis://agent?...`) are always enabled.
 - Without a `key` query param, the app will prompt for confirmation before invoking the agent.
+- With a valid `key`, the run is unattended (no prompt). For Canvas-originated actions, the app injects an internal key automatically.
 
 ## Security / guardrails
 
diff --git a/docs/refactor/canvas-a2ui.md b/docs/refactor/canvas-a2ui.md
index 92149e687..c1fb0cafd 100644
--- a/docs/refactor/canvas-a2ui.md
+++ b/docs/refactor/canvas-a2ui.md
@@ -12,7 +12,16 @@
 
 ## Fixes (2025-12-17)
 - Close button: render a small vibrancy/material pill behind the “x” and reduce the button size for less visual weight.
-- Click reliability: `GatewayConnection` auto-starts the local gateway (and retries briefly) when a request fails in `.local` mode, so Canvas actions don’t silently fail if the gateway isn’t running yet.
+- Click reliability:
+  - Allow A2UI clicks from any local Canvas path (not just `/` or the built-in A2UI shell).
+  - Inject an A2UI → native bridge at document start that listens for `a2uiaction` and forwards it:
+    - Prefer `WKScriptMessageHandler` when available.
+    - Otherwise fall back to an unattended `clawdis://agent?...&key=...` deep link (no prompt).
+  - Intercept `clawdis://…` navigations inside the Canvas WKWebView and route them through `DeepLinkHandler` (no NSWorkspace bounce).
+  - `GatewayConnection` auto-starts the local gateway (and retries briefly) when a request fails in `.local` mode, so Canvas actions don’t silently fail if the gateway isn’t running yet.
+  - Fix a crash that made `clawdis-mac canvas show`/`eval` look “hung”:
+    - `VoicePushToTalkHotkey`’s NSEvent monitor could call `@MainActor` code off-main, triggering executor checks / EXC_BAD_ACCESS on macOS 26.2.
+    - Now it hops back to the main actor before mutating state.
 
 ## Follow-ups
 - Add a small “action sent / failed” debug overlay in the A2UI shell (dev-only) to make failures obvious.