diff --git a/apps/web/src/components/ChatView.tsx b/apps/web/src/components/ChatView.tsx
index b161342f231d..9242d934169f 100644
--- a/apps/web/src/components/ChatView.tsx
+++ b/apps/web/src/components/ChatView.tsx
@@ -4037,6 +4037,7 @@ export default function ChatView(props: ChatViewProps) {
       <RevertConfirmHost
         threadKey={routeThreadKey}
         checkpoints={serverProjection?.checkpoints}
+        worktreePath={activeThread?.worktreePath ?? null}
         onConfirm={onConfirmRevertStable}
       />
       {embedded ? null : <LinkPullRequestDialogHost />}
diff --git a/apps/web/src/components/chat/ChatOverlayHosts.tsx b/apps/web/src/components/chat/ChatOverlayHosts.tsx
index 6f96399f9731..55e58ca7e24b 100644
--- a/apps/web/src/components/chat/ChatOverlayHosts.tsx
+++ b/apps/web/src/components/chat/ChatOverlayHosts.tsx
@@ -196,11 +196,14 @@ export function openRevertConfirm(threadKey: string, pending: PendingRevert): vo
 export function RevertConfirmHost(props: {
   readonly threadKey: string;
   readonly checkpoints: OrchestrationV2ThreadProjection["checkpoints"] | undefined;
+  readonly worktreePath: string | null;
   readonly onConfirm: (turnCount: number, messageId: MessageId, restoreFiles: boolean) => void;
 }) {
   const pending = useThreadOverlay(revertConfirmAtom, props.threadKey);
+  // The server refuses file restore outside an isolated worktree.
   const canRestoreFiles =
     pending !== null &&
+    props.worktreePath !== null &&
     findRevertCheckpoint(props.checkpoints ?? [], pending.turnCount)?.status === "ready";
   const confirm = (restoreFiles: boolean) => {
     if (pending === null || (restoreFiles && !canRestoreFiles)) return;