diff --git a/canvas/src/components/AuditTrailPanel.tsx b/canvas/src/components/AuditTrailPanel.tsx
index e584686de..35b0eab38 100644
--- a/canvas/src/components/AuditTrailPanel.tsx
+++ b/canvas/src/components/AuditTrailPanel.tsx
@@ -172,6 +172,7 @@ export function AuditTrailPanel({ workspaceId }: Props) {
       {error && (
         <div
           role="alert"
+          aria-live="assertive"
           className="mx-4 mt-3 px-3 py-2 bg-red-950/30 border border-red-800/40 rounded text-xs text-bad shrink-0"
         >
           {error}
diff --git a/canvas/src/components/tabs/ActivityTab.tsx b/canvas/src/components/tabs/ActivityTab.tsx
index 092a58bc9..8197bd7fc 100644
--- a/canvas/src/components/tabs/ActivityTab.tsx
+++ b/canvas/src/components/tabs/ActivityTab.tsx
@@ -189,7 +189,11 @@ export function ActivityTab({ workspaceId }: Props) {
         )}
 
         {error && (
-          <div className="px-3 py-1.5 bg-red-900/30 border border-red-800 rounded text-xs text-bad">
+          <div
+            role="alert"
+            aria-live="assertive"
+            className="px-3 py-1.5 bg-red-900/30 border border-red-800 rounded text-xs text-bad"
+          >
             {error}
           </div>
         )}
diff --git a/canvas/src/components/tabs/ChatTab.tsx b/canvas/src/components/tabs/ChatTab.tsx
index d6a9b85ca..a1195a12b 100644
--- a/canvas/src/components/tabs/ChatTab.tsx
+++ b/canvas/src/components/tabs/ChatTab.tsx
@@ -594,7 +594,11 @@ function MyChatPanel({ workspaceId, data }: Props) {
 
       {/* Error banner */}
       {displayError && (
-        <div className="px-3 py-2 bg-red-900/20 border-t border-red-800/30">
+        <div
+          role="alert"
+          aria-live="assertive"
+          className="px-3 py-2 bg-red-900/20 border-t border-red-800/30"
+        >
           <div className="flex items-center justify-between">
             <span className="text-[10px] text-red-300">{displayError}</span>
             {!isOnline && (