diff --git a/change-logs/2026/06/09/feature-sidebar-attention-mode.md b/change-logs/2026/06/09/feature-sidebar-attention-mode.md
new file mode 100644
index 00000000..176f3025
--- /dev/null
+++ b/change-logs/2026/06/09/feature-sidebar-attention-mode.md
@@ -0,0 +1 @@
+Added an "attention" mode to the Active Tasks sidebar. The project/global scope toggle was replaced by three icon buttons — folder (this project), globe (all projects), and a new bell. Clicking the bell filters the list cross-project to only tasks in `user-questions` or `review-by-user` status, sorted oldest-first. The bell shows a pulsing count badge when tasks are waiting and the mode is not already active.
diff --git a/src/mainview/components/ActiveTasksSidebar.tsx b/src/mainview/components/ActiveTasksSidebar.tsx
index 2d67858d..50f92d5f 100644
--- a/src/mainview/components/ActiveTasksSidebar.tsx
+++ b/src/mainview/components/ActiveTasksSidebar.tsx
@@ -14,13 +14,16 @@ import AgentLauncherBadge from "./AgentLauncherBadge";
 import VariantDots from "./VariantDots";
 import { getTaskAgentMeta } from "../utils/taskAgentMeta";
 
-type SidebarScope = "project" | "global";
+type SidebarScope = "project" | "global" | "attention";
 const LS_SIDEBAR_SCOPE = "dev3-sidebar-scope";
 
+/** Statuses that require the user's attention — the "attention" scope shows only these. */
+const ATTENTION_STATUSES: TaskStatus[] = ["user-questions", "review-by-user"];
+
 function readScope(): SidebarScope {
 	try {
 		const v = localStorage.getItem(LS_SIDEBAR_SCOPE);
-		if (v === "global" || v === "project") return v;
+		if (v === "global" || v === "project" || v === "attention") return v;
 	} catch { /* ignore */ }
 	return "project";
 }
@@ -96,9 +99,9 @@ function ActiveTasksSidebar({
 		return () => window.removeEventListener("keydown", handleKeyDown);
 	}, [disableGlobalFindShortcut]);
 
-	// Fetch active tasks from all projects when in global scope.
+	// Fetch active tasks from all projects when in global or attention scope.
 	useEffect(() => {
-		if (scope !== "global") return;
+		if (scope !== "global" && scope !== "attention") return;
 		let cancelled = false;
 		setGlobalLoading(true);
 		(async () => {
@@ -125,7 +128,7 @@ function ActiveTasksSidebar({
 
 	// Keep global tasks live across all projects.
 	useEffect(() => {
-		if (scope !== "global") return;
+		if (scope !== "global" && scope !== "attention") return;
 		function onTaskUpdated(e: Event) {
 			const { task } = (e as CustomEvent).detail as { task: Task };
 			setGlobalTasks((prev) => {
@@ -151,9 +154,24 @@ function ActiveTasksSidebar({
 		return () => window.removeEventListener("rpc:taskUpdated", onTaskUpdated);
 	}, [scope]);
 
-	const sourceTasks = scope === "global" ? globalTasks : tasks;
+	const sourceTasks = (scope === "global" || scope === "attention") ? globalTasks : tasks;
+
+	// Count of attention tasks across all available data (global when loaded, else project).
+	const attentionCount = useMemo(() => {
+		const pool = globalTasks.length > 0 ? globalTasks : tasks;
+		return pool.filter((t) => ATTENTION_STATUSES.includes(t.status)).length;
+	}, [globalTasks, tasks]);
 
 	let activeTasks = sourceTasks.filter((task) => ACTIVE_STATUSES.includes(task.status));
+	if (scope === "attention") {
+		activeTasks = activeTasks.filter((task) => ATTENTION_STATUSES.includes(task.status));
+		// Sort oldest-first so the longest-waiting task is always at the top.
+		activeTasks = activeTasks.slice().sort((a, b) => {
+			const aTime = a.updatedAt ? new Date(a.updatedAt).getTime() : 0;
+			const bTime = b.updatedAt ? new Date(b.updatedAt).getTime() : 0;
+			return aTime - bTime;
+		});
+	}
 	if (searchQuery.trim()) {
 		activeTasks = activeTasks.filter((task) => matchesSearchQuery(task, searchQuery));
 	}
@@ -214,6 +232,7 @@ function ActiveTasksSidebar({
 				</span>
 				<div className="flex items-center gap-1.5 flex-shrink-0 h-5">
 					<div className="inline-flex items-center gap-px" aria-label={t("sidebar.scopeToggleTitle")}>
+						{/* Folder \u2014 this project only */}
 						<button
 							type="button"
 							onClick={() => setScope("project")}
@@ -231,26 +250,7 @@ function ActiveTasksSidebar({
 								{"\uF07C"}
 							</span>
 						</button>
-						<button
-							type="button"
-							role="switch"
-							aria-checked={scope === "global"}
-							onClick={() => setScope(scope === "global" ? "project" : "global")}
-							title={t("sidebar.scopeToggleTitle")}
-							className={`relative inline-flex items-center h-4 w-8 rounded-full transition-colors ${
-								scope === "global" ? "bg-accent" : "bg-fg/20"
-							}`}
-							data-testid="sidebar-scope-toggle"
-						>
-							<span
-								className={`absolute top-1/2 -translate-y-1/2 w-3 h-3 rounded-full bg-white shadow transform transition-transform ${
-									scope === "global" ? "translate-x-[1.125rem]" : "translate-x-0.5"
-								}`}
-							/>
-							<span className="sr-only">
-								{scope === "global" ? t("sidebar.scopeGlobal") : t("sidebar.scopeProject")}
-							</span>
-						</button>
+						{/* Globe \u2014 all projects */}
 						<button
 							type="button"
 							onClick={() => setScope("global")}
@@ -268,6 +268,33 @@ function ActiveTasksSidebar({
 								{"\uEB01"}
 							</span>
 						</button>
+						{/* Bell \u2014 attention mode: cross-project, filtered to tasks needing user input */}
+						<button
+							type="button"
+							onClick={() => setScope("attention")}
+							title={t("sidebar.scopeAttention")}
+							className={`relative inline-flex items-center justify-center h-5 w-5 leading-none transition-colors ${
+								scope === "attention"
+									? "text-amber-400"
+									: attentionCount > 0
+										? "text-amber-400/70 hover:text-amber-400"
+										: "text-fg-muted hover:text-fg-2"
+							}`}
+							data-testid="sidebar-scope-attention"
+						>
+							{/* Nerd Font: nf-fa-bell (U+F0A2) */}
+							<span
+								className={`text-sm leading-none ${scope !== "attention" && attentionCount > 0 ? "animate-pulse" : ""}`}
+								style={{ fontFamily: "'JetBrainsMono Nerd Font Mono'" }}
+							>
+								{"\uF0A2"}
+							</span>
+							{attentionCount > 0 && scope !== "attention" && (
+								<span className="absolute -top-1 -right-1 min-w-[0.875rem] h-3.5 flex items-center justify-center px-0.5 rounded-full bg-amber-500 text-[0.5rem] font-bold text-white leading-none pointer-events-none">
+									{attentionCount > 9 ? "9+" : attentionCount}
+								</span>
+							)}
+						</button>
 					</div>
 					<button
 						onClick={onSwitchToBoard}
@@ -342,13 +369,17 @@ function ActiveTasksSidebar({
 
 			{/* Task list */}
 			<div className="flex-1 overflow-y-auto overflow-x-hidden">
-				{scope === "global" && globalLoading && grouped.length === 0 ? (
+				{(scope === "global" || scope === "attention") && globalLoading && grouped.length === 0 ? (
 					<div className="px-3 py-6 text-center text-xs text-fg-muted">
 						{t("sidebar.globalLoading")}
 					</div>
 				) : grouped.length === 0 ? (
 					<div className="px-3 py-6 text-center text-xs text-fg-muted">
-						{searchQuery.trim() ? t("sidebar.noSearchResults") : t("sidebar.noActiveTasks")}
+						{searchQuery.trim()
+							? t("sidebar.noSearchResults")
+							: scope === "attention"
+								? t("sidebar.noAttentionTasks")
+								: t("sidebar.noActiveTasks")}
 					</div>
 				) : (
 					grouped.map(({ status, tasks: groupTasks }, groupIdx) => (
@@ -386,7 +417,7 @@ function ActiveTasksSidebar({
 									.filter(Boolean) as typeof projectLabels;
 								const groupMembers = task.groupId ? siblingMap.get(task.groupId) ?? [task] : [task];
 								const agentSummary = [agent?.name, configLabel].filter(Boolean).join(" · ");
-								const showProjectBadge = scope === "global" && task.projectId !== project.id;
+								const showProjectBadge = (scope === "global" || scope === "attention") && task.projectId !== project.id;
 								const projectBadgeName = taskProject?.name ?? t("sidebar.unknownProject");
 
 								return (
diff --git a/src/mainview/components/__tests__/ActiveTasksSidebar.test.tsx b/src/mainview/components/__tests__/ActiveTasksSidebar.test.tsx
index bcd0ace0..e4b3d6cc 100644
--- a/src/mainview/components/__tests__/ActiveTasksSidebar.test.tsx
+++ b/src/mainview/components/__tests__/ActiveTasksSidebar.test.tsx
@@ -153,7 +153,7 @@ describe("ActiveTasksSidebar", () => {
 		// Cross-project task is hidden in project scope.
 		expect(screen.queryByText("Cross-project task")).not.toBeInTheDocument();
 
-		await user.click(screen.getByTestId("sidebar-scope-toggle"));
+		await user.click(screen.getByTestId("sidebar-scope-global"));
 
 		await waitFor(() => {
 			expect(screen.getByText("Cross-project task")).toBeInTheDocument();
@@ -170,6 +170,141 @@ describe("ActiveTasksSidebar", () => {
 		});
 	});
 
+	it("attention scope shows only tasks needing user input, oldest-first, cross-project", async () => {
+		const user = userEvent.setup();
+		const { api } = await import("../../rpc");
+		const otherProject: Project = {
+			id: "p2",
+			name: "Other Project",
+			path: "/tmp/other",
+			setupScript: "",
+			devScript: "",
+			cleanupScript: "",
+			defaultBaseBranch: "main",
+			createdAt: "2025-01-01T00:00:00Z",
+		};
+		const olderReview = makeTask({
+			id: "rv-old", seq: 100, projectId: "p2",
+			title: "Older review", description: "Older review",
+			status: "review-by-user",
+			groupId: null as unknown as string, variantIndex: null,
+			updatedAt: "2025-01-01T00:00:00Z",
+		});
+		const newerReview = makeTask({
+			id: "rv-new", seq: 101, projectId: "p1",
+			title: "Newer review", description: "Newer review",
+			status: "review-by-user",
+			groupId: null as unknown as string, variantIndex: null,
+			updatedAt: "2025-06-01T00:00:00Z",
+		});
+		const question = makeTask({
+			id: "q1", seq: 102, projectId: "p1",
+			title: "Has a question", description: "Has a question",
+			status: "user-questions",
+			groupId: null as unknown as string, variantIndex: null,
+			updatedAt: "2025-03-01T00:00:00Z",
+		});
+		const working = makeTask({
+			id: "w1", seq: 103, projectId: "p1",
+			title: "Still working", description: "Still working",
+			status: "in-progress",
+			groupId: null as unknown as string, variantIndex: null,
+		});
+		(api.request.getAllProjectTasks as ReturnType<typeof vi.fn>).mockResolvedValue([
+			{ projectId: "p1", tasks: [newerReview, question, working] },
+			{ projectId: "p2", tasks: [olderReview] },
+		]);
+
+		render(
+			<I18nProvider>
+				<ActiveTasksSidebar
+					project={project}
+					tasks={[working]}
+					allProjects={[project, otherProject]}
+					activeTaskId="t1"
+					dispatch={vi.fn()}
+					navigate={vi.fn()}
+					agents={[claudeAgent]}
+					bellCounts={new Map()}
+					taskPorts={new Map()}
+					onSwitchToBoard={vi.fn()}
+				/>
+			</I18nProvider>,
+		);
+
+		await user.click(screen.getByTestId("sidebar-scope-attention"));
+
+		await waitFor(() => {
+			expect(screen.getByText("Older review")).toBeInTheDocument();
+		});
+		// in-progress task is excluded from attention scope
+		expect(screen.queryByText("Still working")).not.toBeInTheDocument();
+		// question task (other attention status) is included
+		expect(screen.getByText("Has a question")).toBeInTheDocument();
+		// oldest-first within the review-by-user group
+		const older = screen.getByText("Older review");
+		const newer = screen.getByText("Newer review");
+		expect(
+			older.compareDocumentPosition(newer) & Node.DOCUMENT_POSITION_FOLLOWING,
+		).toBeTruthy();
+		expect(localStorage.getItem("dev3-sidebar-scope")).toBe("attention");
+	});
+
+	it("shows a count badge on the bell when tasks await input and attention scope is inactive", () => {
+		render(
+			<I18nProvider>
+				<ActiveTasksSidebar
+					project={project}
+					tasks={[
+						makeTask({ id: "a1", status: "review-by-user" }),
+						makeTask({ id: "a2", status: "user-questions" }),
+						makeTask({ id: "a3", status: "in-progress" }),
+					]}
+					activeTaskId="a1"
+					dispatch={vi.fn()}
+					navigate={vi.fn()}
+					agents={[claudeAgent]}
+					bellCounts={new Map()}
+					taskPorts={new Map()}
+					onSwitchToBoard={vi.fn()}
+				/>
+			</I18nProvider>,
+		);
+
+		// Two attention-status tasks → badge reads "2".
+		expect(screen.getByTestId("sidebar-scope-attention")).toHaveTextContent("2");
+	});
+
+	it("shows the attention empty state when nothing needs the user's input", async () => {
+		const user = userEvent.setup();
+		const { api } = await import("../../rpc");
+		(api.request.getAllProjectTasks as ReturnType<typeof vi.fn>).mockResolvedValue([
+			{ projectId: "p1", tasks: [makeTask({ id: "w1", status: "in-progress" })] },
+		]);
+
+		render(
+			<I18nProvider>
+				<ActiveTasksSidebar
+					project={project}
+					tasks={[makeTask({ id: "w1", status: "in-progress" })]}
+					activeTaskId="w1"
+					dispatch={vi.fn()}
+					navigate={vi.fn()}
+					agents={[claudeAgent]}
+					bellCounts={new Map()}
+					taskPorts={new Map()}
+					onSwitchToBoard={vi.fn()}
+				/>
+			</I18nProvider>,
+		);
+
+		await user.click(screen.getByTestId("sidebar-scope-attention"));
+
+		await waitFor(() => {
+			expect(screen.getByText("Nothing needs your attention")).toBeInTheDocument();
+		});
+	});
+
 	it("shows overview inline only for the active task when overview is set", () => {
 		render(
 			<I18nProvider>
diff --git a/src/mainview/i18n/translations/en/common.ts b/src/mainview/i18n/translations/en/common.ts
index 7b1bc490..68550a85 100644
--- a/src/mainview/i18n/translations/en/common.ts
+++ b/src/mainview/i18n/translations/en/common.ts
@@ -55,6 +55,8 @@ const common = {
 	"sidebar.scopeToggleTitle": "Toggle task scope (this project / all projects)",
 	"sidebar.globalLoading": "Loading tasks from all projects…",
 	"sidebar.unknownProject": "Unknown project",
+	"sidebar.scopeAttention": "Needs your attention — tasks waiting for your input, across all projects",
+	"sidebar.noAttentionTasks": "Nothing needs your attention",
 
 	// Open in...
 	"openIn.menuTitle": "Open in...",
diff --git a/src/mainview/i18n/translations/en/tips.ts b/src/mainview/i18n/translations/en/tips.ts
index b0a9ddee..3b04d248 100644
--- a/src/mainview/i18n/translations/en/tips.ts
+++ b/src/mainview/i18n/translations/en/tips.ts
@@ -206,6 +206,8 @@ const tips = {
 	"tip.quitConfirm.body": "Quitting via Cmd+Q, the menu, or the dock shows a confirmation so your background tmux sessions don't vanish by surprise.",
 	"tip.sidebarHide.title": "Hide the Active Tasks panel",
 	"tip.sidebarHide.body": "Click the fullscreen icon in the sidebar header to collapse it and give the terminal the whole window.",
+	"tip.sidebarAttentionMode.title": "Bell = needs your eyes",
+	"tip.sidebarAttentionMode.body": "Click the bell icon in the sidebar to see every task waiting for your input across all projects, sorted oldest-first.",
 } as const;
 
 export default tips;
diff --git a/src/mainview/i18n/translations/es/common.ts b/src/mainview/i18n/translations/es/common.ts
index 56350e98..11da78ab 100644
--- a/src/mainview/i18n/translations/es/common.ts
+++ b/src/mainview/i18n/translations/es/common.ts
@@ -55,6 +55,8 @@ const common = {
 	"sidebar.scopeToggleTitle": "Alternar alcance (este proyecto / todos los proyectos)",
 	"sidebar.globalLoading": "Cargando tareas de todos los proyectos…",
 	"sidebar.unknownProject": "Proyecto desconocido",
+	"sidebar.scopeAttention": "Requiere tu atención — tareas esperando tu respuesta en todos los proyectos",
+	"sidebar.noAttentionTasks": "Nada requiere tu atención",
 
 	// Open in...
 	"openIn.menuTitle": "Abrir en...",
diff --git a/src/mainview/i18n/translations/es/tips.ts b/src/mainview/i18n/translations/es/tips.ts
index 18d6af41..3178f25f 100644
--- a/src/mainview/i18n/translations/es/tips.ts
+++ b/src/mainview/i18n/translations/es/tips.ts
@@ -206,6 +206,8 @@ const tips = {
 	"tip.quitConfirm.body": "Salir con Cmd+Q, el menú o el dock muestra una confirmación para que tus sesiones tmux en segundo plano no desaparezcan por sorpresa.",
 	"tip.sidebarHide.title": "Ocultar el panel de Tareas activas",
 	"tip.sidebarHide.body": "Pulsa el icono de pantalla completa en la cabecera del panel para plegarlo y dar al terminal toda la ventana.",
+	"tip.sidebarAttentionMode.title": "Campana = necesita tu atención",
+	"tip.sidebarAttentionMode.body": "Pulsa el icono de campana en el panel para ver todas las tareas esperando tu respuesta en todos los proyectos, ordenadas de más antigua a más reciente.",
 };
 
 export default tips;
diff --git a/src/mainview/i18n/translations/ru/common.ts b/src/mainview/i18n/translations/ru/common.ts
index 4ee01dd4..d1411758 100644
--- a/src/mainview/i18n/translations/ru/common.ts
+++ b/src/mainview/i18n/translations/ru/common.ts
@@ -55,6 +55,8 @@ const common = {
 	"sidebar.scopeToggleTitle": "Переключить область задач (этот проект / все проекты)",
 	"sidebar.globalLoading": "Загрузка задач изо всех проектов…",
 	"sidebar.unknownProject": "Неизвестный проект",
+	"sidebar.scopeAttention": "Требует внимания — задачи, ожидающие вашего ответа, по всем проектам",
+	"sidebar.noAttentionTasks": "Всё в порядке, ничего не ждёт вашего ответа",
 
 	// Open in...
 	"openIn.menuTitle": "Открыть в...",
diff --git a/src/mainview/i18n/translations/ru/tips.ts b/src/mainview/i18n/translations/ru/tips.ts
index dbbe4931..0f3109a3 100644
--- a/src/mainview/i18n/translations/ru/tips.ts
+++ b/src/mainview/i18n/translations/ru/tips.ts
@@ -206,6 +206,8 @@ const tips = {
 	"tip.quitConfirm.body": "Выход через Cmd+Q, меню или док показывает подтверждение, чтобы фоновые tmux-сессии не исчезли внезапно.",
 	"tip.sidebarHide.title": "Скрыть панель Active Tasks",
 	"tip.sidebarHide.body": "Нажмите иконку полноэкранного режима в шапке панели, чтобы свернуть её и отдать всё окно терминалу.",
+	"tip.sidebarAttentionMode.title": "Колокол = ждёт твоих глаз",
+	"tip.sidebarAttentionMode.body": "Кликни иконку колокола в панели, чтобы увидеть все задачи, ожидающие твоего ответа по всем проектам, начиная с самых старых.",
 };
 
 export default tips;
diff --git a/src/mainview/tips.ts b/src/mainview/tips.ts
index f420cb02..cb616cc9 100644
--- a/src/mainview/tips.ts
+++ b/src/mainview/tips.ts
@@ -654,6 +654,13 @@ const ALL_TIPS: Tip[] = [
 		bodyKey: "tip.sidebarHide.body",
 		icon: "\u{F0294}", // nf-md-fullscreen
 	},
+	// Batch 42: attention mode
+	{
+		id: "sidebar-attention-mode",
+		titleKey: "tip.sidebarAttentionMode.title",
+		bodyKey: "tip.sidebarAttentionMode.body",
+		icon: "\u{F0A2}", // nf-fa-bell
+	},
 ];
 
 const COOLDOWN_MS = 3 * 24 * 60 * 60 * 1000; // 3 days