From 7ad1599b70f2007d4bec4642f0f008196deb434f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Carlos=20Flor=C3=AAncio?= <carlosmflorencio@gmail.com>
Date: Fri, 31 Jul 2026 14:23:16 +0100
Subject: [PATCH] feat(web): show WebSocket connectivity warnings (#2083)

---
 .../app-sidebar/app-sidebar-footer.test.tsx   |  35 ++-
 .../app-sidebar/app-sidebar-footer.tsx        | 103 +++++++--
 .../app-status-bar/app-status-bar.test.tsx    |  22 +-
 .../app-status-bar/app-status-drawer.test.tsx |  42 ++++
 .../app-status-bar/app-status-drawer.tsx      |   4 +-
 .../app-status-bar/app-status-items.tsx       |   8 +-
 .../app-status-surface-provider.test.tsx      | 100 ++++++++-
 .../app-status-surface-provider.tsx           |  55 ++++-
 .../connection-status-item.test.tsx           |  19 +-
 .../app-status-bar/connection-status-item.tsx |  45 +++-
 .../kanban/kanban-header-mobile.test.tsx      |  19 ++
 .../kanban/kanban-header-mobile.tsx           |  24 ++-
 .../components/kanban/mobile-menu-sheet.tsx   |  18 +-
 .../settings/settings-layout-client.tsx       |  39 +++-
 .../mobile/session-mobile-bottom-nav.test.tsx |  17 ++
 .../task/mobile/session-mobile-bottom-nav.tsx |  84 ++++++--
 .../task/mobile/session-mobile-layout.tsx     |  23 +-
 .../e2e/tests/layout/app-status-bar.spec.ts   |  17 ++
 .../mobile-ws-connectivity-warning.spec.ts    |  83 ++++++++
 .../layout/ws-connectivity-warning.spec.ts    |  96 +++++++++
 apps/web/lib/state/slices/ui/types.ts         |   4 +-
 apps/web/lib/state/slices/ui/ui-slice.ts      |   6 +-
 apps/web/lib/state/store.test.ts              |   6 +
 apps/web/lib/state/store.ts                   |   3 +
 apps/web/lib/types/connection.ts              |   2 +
 .../lib/ws/connection-issue-monitor.test.ts   |  70 ++++++
 apps/web/lib/ws/connection-issue-monitor.ts   |  55 +++++
 apps/web/lib/ws/use-websocket.test.tsx        |  71 +++++++
 apps/web/lib/ws/use-websocket.tsx             |   6 +
 docs/plans/ws-connectivity-warning/plan.md    | 199 ++++++++++++++++++
 .../task-01-connection-issue-timing.md        |  75 +++++++
 .../task-02-desktop-warning-surfaces.md       |  62 ++++++
 .../task-03-mobile-warning-surfaces.md        |  73 +++++++
 .../task-04-connectivity-warning-e2e.md       |  63 ++++++
 .../task-05-public-documentation.md           |  65 ++++++
 docs/public/configuration.md                  |  10 +-
 docs/public/operations.md                     |   6 +-
 docs/specs/INDEX.md                           |   3 +-
 docs/specs/feature-toggles/spec.md            |   5 +-
 docs/specs/office/live-updates.md             |   2 +-
 docs/specs/ui/app-status-bar.md               |  11 +-
 docs/specs/ui/ws-connectivity-warning.md      | 117 ++++++++++
 42 files changed, 1682 insertions(+), 85 deletions(-)
 create mode 100644 apps/web/e2e/tests/layout/mobile-ws-connectivity-warning.spec.ts
 create mode 100644 apps/web/e2e/tests/layout/ws-connectivity-warning.spec.ts
 create mode 100644 apps/web/lib/ws/connection-issue-monitor.test.ts
 create mode 100644 apps/web/lib/ws/connection-issue-monitor.ts
 create mode 100644 apps/web/lib/ws/use-websocket.test.tsx
 create mode 100644 docs/plans/ws-connectivity-warning/plan.md
 create mode 100644 docs/plans/ws-connectivity-warning/task-01-connection-issue-timing.md
 create mode 100644 docs/plans/ws-connectivity-warning/task-02-desktop-warning-surfaces.md
 create mode 100644 docs/plans/ws-connectivity-warning/task-03-mobile-warning-surfaces.md
 create mode 100644 docs/plans/ws-connectivity-warning/task-04-connectivity-warning-e2e.md
 create mode 100644 docs/plans/ws-connectivity-warning/task-05-public-documentation.md
 create mode 100644 docs/specs/ui/ws-connectivity-warning.md

diff --git a/apps/web/components/app-sidebar/app-sidebar-footer.test.tsx b/apps/web/components/app-sidebar/app-sidebar-footer.test.tsx
index 21e3f5749f..ebb232079b 100644
--- a/apps/web/components/app-sidebar/app-sidebar-footer.test.tsx
+++ b/apps/web/components/app-sidebar/app-sidebar-footer.test.tsx
@@ -22,9 +22,11 @@ const state = {
     mode: "disabled" as string,
     user: null as { display_name: string; email: string } | null,
   },
+  connection: { issueSeverity: "none" as "none" | "unstable" | "lost" },
 };
 
 let officeEnabled = false;
+let appStatusBarEnabled = true;
 const DEFAULT_PATHNAME = "/tasks/session-1";
 let pathname = DEFAULT_PATHNAME;
 
@@ -38,7 +40,7 @@ vi.mock("@/components/state-provider", () => ({
 }));
 
 vi.mock("@/hooks/domains/features/use-feature", () => ({
-  useFeature: () => officeEnabled,
+  useFeature: (name: string) => (name === "office" ? officeEnabled : appStatusBarEnabled),
 }));
 
 vi.mock("@/hooks/use-release-notes", () => ({
@@ -114,6 +116,8 @@ describe("AppSidebarFooter", () => {
     ];
     state.appSidebar.settingsMode = false;
     state.auth = { mode: "disabled", user: null };
+    state.connection.issueSeverity = "none";
+    appStatusBarEnabled = true;
     window.localStorage.clear();
     document.cookie = "office-active-workspace=; path=/; max-age=0";
     mocks.routerPush.mockClear();
@@ -232,6 +236,35 @@ describe("AppSidebarFooter", () => {
   });
 });
 
+describe("AppSidebarFooter connection fallback", () => {
+  beforeEach(() => {
+    appStatusBarEnabled = true;
+    state.connection.issueSeverity = "none";
+  });
+
+  afterEach(cleanup);
+
+  it("shows the connection fallback immediately after the theme control during an outage", () => {
+    appStatusBarEnabled = false;
+    state.connection.issueSeverity = "unstable";
+
+    renderFooter();
+
+    const warning = screen.getByTestId("sidebar-connection-warning");
+    expect(warning.getAttribute("aria-label")).toBe("Connection unstable. Reconnecting to Kandev.");
+    expect(warning.getAttribute("data-connection-severity")).toBe("unstable");
+    expect(screen.getByRole("button", { name: "Theme" }).nextElementSibling).toBe(warning);
+  });
+
+  it("does not duplicate the warning fallback when the app status bar is enabled", () => {
+    state.connection.issueSeverity = "lost";
+
+    renderFooter();
+
+    expect(screen.queryByTestId("sidebar-connection-warning")).toBeNull();
+  });
+});
+
 describe("AppSidebarFooter current-user chip", () => {
   beforeEach(() => {
     officeEnabled = false;
diff --git a/apps/web/components/app-sidebar/app-sidebar-footer.tsx b/apps/web/components/app-sidebar/app-sidebar-footer.tsx
index 274685fc8e..7d6c050b14 100644
--- a/apps/web/components/app-sidebar/app-sidebar-footer.tsx
+++ b/apps/web/components/app-sidebar/app-sidebar-footer.tsx
@@ -9,6 +9,7 @@ import {
   IconSettings,
   IconSparkles,
   IconStethoscope,
+  IconWifiOff,
 } from "@tabler/icons-react";
 import type { Icon as TablerIcon } from "@tabler/icons-react";
 import { Button } from "@kandev/ui/button";
@@ -31,6 +32,8 @@ import {
   workspaceHomeHref,
 } from "./app-sidebar-workspace-navigation";
 import { isSettingsRoute } from "./app-sidebar-route";
+import { connectionIssueDetails } from "../app-status-bar/connection-status-item";
+import type { ConnectionIssueSeverity } from "@/lib/types/connection";
 
 type AppSidebarFooterProps = {
   collapsed: boolean;
@@ -98,6 +101,87 @@ function FooterIconButton({
   );
 }
 
+function SidebarConnectionWarning({
+  collapsed,
+  severity,
+}: {
+  collapsed: boolean;
+  severity: Exclude<ConnectionIssueSeverity, "none">;
+}) {
+  const details = connectionIssueDetails(severity);
+
+  return (
+    <Tooltip>
+      <TooltipTrigger asChild>
+        <span
+          className="relative flex h-9 w-9 shrink-0 items-center justify-center rounded-md text-muted-foreground outline-none focus-visible:ring-2 focus-visible:ring-ring"
+          role="status"
+          aria-label={details.description}
+          tabIndex={0}
+          data-testid="sidebar-connection-warning"
+          data-connection-severity={severity}
+        >
+          <IconWifiOff className="size-4" aria-hidden="true" />
+          <span
+            className={cn(
+              "absolute right-1 top-1 size-2 rounded-full ring-2 ring-background",
+              details.dotClass,
+            )}
+            aria-hidden="true"
+          />
+          <span className="sr-only">{details.label}</span>
+        </span>
+      </TooltipTrigger>
+      <TooltipContent side={collapsed ? "right" : "top"}>{details.description}</TooltipContent>
+    </Tooltip>
+  );
+}
+
+function SidebarConnectionFallback({
+  collapsed,
+  appStatusBarEnabled,
+}: {
+  collapsed: boolean;
+  appStatusBarEnabled: boolean;
+}) {
+  const severity = useAppStore((state) => state.connection.issueSeverity);
+  if (appStatusBarEnabled || severity === "none") return null;
+  return <SidebarConnectionWarning collapsed={collapsed} severity={severity} />;
+}
+
+function SidebarFooterDialogs({
+  improveOpen,
+  onImproveOpenChange,
+  workspaceId,
+  onTaskCreated,
+  releaseNotes,
+}: {
+  improveOpen: boolean;
+  onImproveOpenChange: (open: boolean) => void;
+  workspaceId: string | null;
+  onTaskCreated: (task: { id: string }) => void;
+  releaseNotes: ReturnType<typeof useReleaseNotes>;
+}) {
+  return (
+    <>
+      <ImproveKandevDialog
+        open={improveOpen}
+        onOpenChange={onImproveOpenChange}
+        workspaceId={workspaceId}
+        onSuccess={onTaskCreated}
+      />
+      {releaseNotes.hasNotes && (
+        <ReleaseNotesDialog
+          open={releaseNotes.dialogOpen}
+          onOpenChange={releaseNotes.closeDialog}
+          entries={releaseNotes.unseenEntries}
+          latestVersion={releaseNotes.latestVersion}
+        />
+      )}
+    </>
+  );
+}
+
 export function AppSidebarFooter({ collapsed, onToggleSettingsMode }: AppSidebarFooterProps) {
   const router = useRouter();
   const pathname = usePathname();
@@ -121,6 +205,7 @@ export function AppSidebarFooter({ collapsed, onToggleSettingsMode }: AppSidebar
     onToggleSettingsMode();
   };
   const officeEnabled = useFeature("office");
+  const appStatusBarEnabled = useFeature("appStatusBar");
   const releaseNotes = useReleaseNotes();
   const [improveOpen, setImproveOpen] = useState(false);
   const authMode = useAppStore((s) => s.auth.mode);
@@ -184,23 +269,17 @@ export function AppSidebarFooter({ collapsed, onToggleSettingsMode }: AppSidebar
         />
       )}
       <ThemeToggle />
+      <SidebarConnectionFallback collapsed={collapsed} appStatusBarEnabled={appStatusBarEnabled} />
       {showCurrentUser && (
         <CurrentUserChip collapsed={collapsed} className={cn(!collapsed && "ml-auto")} />
       )}
-      <ImproveKandevDialog
-        open={improveOpen}
-        onOpenChange={setImproveOpen}
+      <SidebarFooterDialogs
+        improveOpen={improveOpen}
+        onImproveOpenChange={setImproveOpen}
         workspaceId={workspaceId ?? null}
-        onSuccess={(task) => router.push(linkToTask(task.id))}
+        onTaskCreated={(task) => router.push(linkToTask(task.id))}
+        releaseNotes={releaseNotes}
       />
-      {releaseNotes.hasNotes && (
-        <ReleaseNotesDialog
-          open={releaseNotes.dialogOpen}
-          onOpenChange={releaseNotes.closeDialog}
-          entries={releaseNotes.unseenEntries}
-          latestVersion={releaseNotes.latestVersion}
-        />
-      )}
     </div>
   );
 }
diff --git a/apps/web/components/app-status-bar/app-status-bar.test.tsx b/apps/web/components/app-status-bar/app-status-bar.test.tsx
index 8da36ac2a9..674d2eca2a 100644
--- a/apps/web/components/app-status-bar/app-status-bar.test.tsx
+++ b/apps/web/components/app-status-bar/app-status-bar.test.tsx
@@ -3,6 +3,7 @@ import { TooltipProvider } from "@kandev/ui/tooltip";
 import { toast } from "sonner";
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import { StateProvider } from "@/components/state-provider";
+import type { AppState } from "@/lib/state/store";
 import { ApiError } from "@/lib/api/client";
 import { updateUserSettings } from "@/lib/api/domains/settings-api";
 import { pluginRegistry } from "@/lib/plugins/registry";
@@ -104,6 +105,23 @@ describe("AppStatusBar rendering", () => {
     expect(document.querySelector(`[data-status-item-id="${APP_STATUS_METRICS_ID}"]`)).toBeNull();
   });
 
+  it("keeps the saved connection item identity while collapsing its healthy content", () => {
+    renderBar();
+
+    expect(statusItem(APP_STATUS_CONNECTION_ID)).toBeTruthy();
+    expect(screen.queryByTestId("app-status-connection")).toBeNull();
+  });
+
+  it("shows the active connection warning in the bottom status bar", () => {
+    renderBar({
+      connection: { status: "reconnecting", error: null, issueSeverity: "lost" },
+    });
+
+    expect(screen.getByTestId("app-status-connection").getAttribute("aria-label")).toBe(
+      "Connection lost for at least 10 seconds. Live updates may be stale.",
+    );
+  });
+
   it("collapses a plugin item when its contribution renders nothing", () => {
     pluginRegistry.forPlugin(RIGHT_PLUGIN_ID).registerComponent("app-status-bar-right", () => null);
 
@@ -263,9 +281,9 @@ describe("AppStatusBar persistence and recovery", () => {
   });
 });
 
-function renderBar() {
+function renderBar(initialState?: Partial<AppState>) {
   return render(
-    <StateProvider>
+    <StateProvider initialState={initialState}>
       <TooltipProvider>
         <AppStatusBar
           pathname="/"
diff --git a/apps/web/components/app-status-bar/app-status-drawer.test.tsx b/apps/web/components/app-status-bar/app-status-drawer.test.tsx
index ce1e0f48dc..b041256421 100644
--- a/apps/web/components/app-status-bar/app-status-drawer.test.tsx
+++ b/apps/web/components/app-status-bar/app-status-drawer.test.tsx
@@ -26,6 +26,39 @@ vi.mock("@/hooks/use-responsive-breakpoint", () => ({
 const LEFT_PLUGIN_ID = "drawer-left";
 const RIGHT_PLUGIN_ID = "drawer-right";
 
+function renderConnectionOnlyDrawer() {
+  pluginRegistry
+    .forPlugin(LEFT_PLUGIN_ID)
+    .registerComponent("app-status-bar-left", () => <span>Left plugin</span>);
+  pluginRegistry
+    .forPlugin(RIGHT_PLUGIN_ID)
+    .registerComponent("app-status-bar-right", () => <span>Right plugin</span>);
+
+  render(
+    <StateProvider
+      initialState={{
+        userSettings: {
+          ...defaultSettingsState.userSettings,
+          systemMetricsDisplay: { showInTopbar: true, simplified: false },
+        },
+        connection: { status: "reconnecting", error: null, issueSeverity: "unstable" },
+      }}
+    >
+      <TooltipProvider>
+        <AppStatusDrawer
+          pathname="/"
+          activeWorkspaceId={null}
+          activeTaskId={null}
+          activeSessionId={null}
+          open
+          onOpenChange={() => {}}
+          connectionOnly
+        />
+      </TooltipProvider>
+    </StateProvider>,
+  );
+}
+
 describe("AppStatusDrawer", () => {
   afterEach(() => {
     cleanup();
@@ -114,4 +147,13 @@ describe("AppStatusDrawer", () => {
     );
     expect(row?.className).toContain("empty:hidden");
   });
+
+  it("renders only connection state in connection-only mode", () => {
+    renderConnectionOnlyDrawer();
+
+    const rows = screen
+      .getByTestId("app-status-drawer")
+      .querySelectorAll<HTMLElement>("[data-status-item-id]");
+    expect(Array.from(rows, (row) => row.dataset.statusItemId)).toEqual([APP_STATUS_CONNECTION_ID]);
+  });
 });
diff --git a/apps/web/components/app-status-bar/app-status-drawer.tsx b/apps/web/components/app-status-bar/app-status-drawer.tsx
index cdd89e9e34..8464286a2b 100644
--- a/apps/web/components/app-status-bar/app-status-drawer.tsx
+++ b/apps/web/components/app-status-bar/app-status-drawer.tsx
@@ -14,6 +14,7 @@ type AppStatusDrawerProps = {
   activeSessionId: string | null;
   open: boolean;
   onOpenChange: (open: boolean) => void;
+  connectionOnly?: boolean;
 };
 
 export function AppStatusDrawer({
@@ -23,12 +24,13 @@ export function AppStatusDrawer({
   activeSessionId,
   open,
   onOpenChange,
+  connectionOnly = false,
 }: AppStatusDrawerProps) {
   const context = useMemo(
     () => ({ pathname, activeWorkspaceId, activeTaskId, activeSessionId }),
     [pathname, activeWorkspaceId, activeTaskId, activeSessionId],
   );
-  const activeItems = useAppStatusItems(context);
+  const activeItems = useAppStatusItems(context, { connectionOnly });
   const { projected } = useAppStatusBarOrder(activeItems);
   const orderedItems = [...projected.left, ...projected.right];
   let drawerHeight = "h-[min(32rem,calc(100dvh-16px-env(safe-area-inset-bottom,0px)))]";
diff --git a/apps/web/components/app-status-bar/app-status-items.tsx b/apps/web/components/app-status-bar/app-status-items.tsx
index 327b082d0e..ecb2a66604 100644
--- a/apps/web/components/app-status-bar/app-status-items.tsx
+++ b/apps/web/components/app-status-bar/app-status-items.tsx
@@ -28,7 +28,10 @@ type AppStatusContext = Pick<
   "pathname" | "activeWorkspaceId" | "activeTaskId" | "activeSessionId"
 >;
 
-export function useAppStatusItems(context: AppStatusContext): AppStatusItem[] {
+export function useAppStatusItems(
+  context: AppStatusContext,
+  { connectionOnly = false }: { connectionOnly?: boolean } = {},
+): AppStatusItem[] {
   const registry = usePluginRegistry();
   const registryVersion = registry.getVersion();
   const metricsEnabled = useAppStore(
@@ -38,13 +41,14 @@ export function useAppStatusItems(context: AppStatusContext): AppStatusItem[] {
   return useMemo(() => {
     const left = registry.getSlotRegistrations("app-status-bar-left");
     const right = registry.getSlotRegistrations("app-status-bar-right");
+    if (connectionOnly) return [connectionItem()];
     return [
       connectionItem(),
       ...left.map((registration) => pluginItem(registration, "left", context)),
       ...(metricsEnabled ? [metricsItem()] : []),
       ...right.map((registration) => pluginItem(registration, "right", context)),
     ];
-  }, [context, metricsEnabled, registry, registryVersion]);
+  }, [connectionOnly, context, metricsEnabled, registry, registryVersion]);
 }
 
 function connectionItem(): AppStatusItem {
diff --git a/apps/web/components/app-status-bar/app-status-surface-provider.test.tsx b/apps/web/components/app-status-bar/app-status-surface-provider.test.tsx
index 39d6d60299..9af3583a67 100644
--- a/apps/web/components/app-status-bar/app-status-surface-provider.test.tsx
+++ b/apps/web/components/app-status-bar/app-status-surface-provider.test.tsx
@@ -1,6 +1,7 @@
 import { cleanup, fireEvent, render, screen } from "@testing-library/react";
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
-import { StateProvider } from "@/components/state-provider";
+import { StateProvider, useAppStoreApi } from "@/components/state-provider";
+import type { AppState } from "@/lib/state/store";
 import { AppStatusDrawerTrigger, AppStatusSurfaceProvider } from "./app-status-surface-provider";
 
 const responsiveState = vi.hoisted(() => ({
@@ -9,6 +10,7 @@ const responsiveState = vi.hoisted(() => ({
 const featureState = vi.hoisted(() => ({ appStatusBar: true }));
 const STATUS_BAR_TEST_ID = "app-status-bar";
 const STATUS_DRAWER_TEST_ID = "app-status-drawer";
+const STATUS_DRAWER_TRIGGER_TEST_ID = "app-status-drawer-trigger";
 
 vi.mock("@/hooks/use-responsive-breakpoint", () => ({
   useResponsiveBreakpoint: () => ({
@@ -32,21 +34,43 @@ vi.mock("./app-status-bar", () => ({
 }));
 
 vi.mock("./app-status-drawer", () => ({
-  AppStatusDrawer: ({ open }: { open: boolean }) => (
-    <div data-testid={STATUS_DRAWER_TEST_ID}>{String(open)}</div>
+  AppStatusDrawer: ({ open, connectionOnly }: { open: boolean; connectionOnly?: boolean }) => (
+    <div data-testid={STATUS_DRAWER_TEST_ID} data-connection-only={connectionOnly}>
+      {String(open)}
+    </div>
   ),
 }));
 
-function renderSurface() {
+function renderSurface(initialState?: Partial<AppState>, children = <AppStatusDrawerTrigger />) {
   return render(
-    <StateProvider>
-      <AppStatusSurfaceProvider>
-        <AppStatusDrawerTrigger />
-      </AppStatusSurfaceProvider>
+    <StateProvider initialState={initialState}>
+      <AppStatusSurfaceProvider>{children}</AppStatusSurfaceProvider>
     </StateProvider>,
   );
 }
 
+function ConnectionIssueControls() {
+  const store = useAppStoreApi();
+  return (
+    <>
+      <button
+        data-testid="recover-connection"
+        onClick={() => {
+          store.getState().setConnectionStatus("connected");
+          store.getState().setConnectionIssueSeverity("none");
+        }}
+      />
+      <button
+        data-testid="restore-connection-issue"
+        onClick={() => {
+          store.getState().setConnectionStatus("reconnecting");
+          store.getState().setConnectionIssueSeverity("unstable");
+        }}
+      />
+    </>
+  );
+}
+
 describe("AppStatusSurfaceProvider", () => {
   beforeEach(() => {
     responsiveState.breakpoint = "desktop";
@@ -80,7 +104,25 @@ describe("AppStatusSurfaceProvider", () => {
 
     expect(screen.queryByTestId(STATUS_BAR_TEST_ID)).toBeNull();
     expect(screen.queryByTestId(STATUS_DRAWER_TEST_ID)).toBeNull();
-    expect(screen.queryByTestId("app-status-drawer-trigger")).toBeNull();
+    expect(screen.queryByTestId(STATUS_DRAWER_TRIGGER_TEST_ID)).toBeNull();
+  });
+
+  it("exposes a connection-only Status drawer for an active phone warning when disabled", () => {
+    responsiveState.breakpoint = "mobile";
+    featureState.appStatusBar = false;
+    renderSurface({
+      connection: { status: "reconnecting", error: null, issueSeverity: "unstable" },
+    });
+
+    expect(screen.getByTestId(STATUS_DRAWER_TEST_ID).getAttribute("data-connection-only")).toBe(
+      "true",
+    );
+    expect(screen.getByTestId(STATUS_DRAWER_TRIGGER_TEST_ID).getAttribute("aria-label")).toBe(
+      "Connection unstable. Reconnecting to Kandev.",
+    );
+
+    fireEvent.click(screen.getByTestId(STATUS_DRAWER_TRIGGER_TEST_ID));
+    expect(screen.getByTestId(STATUS_DRAWER_TEST_ID).textContent).toBe("true");
   });
 
   it("does not expose a drawer trigger at the tablet breakpoint", () => {
@@ -89,6 +131,44 @@ describe("AppStatusSurfaceProvider", () => {
 
     expect(screen.getByTestId(STATUS_BAR_TEST_ID)).toBeTruthy();
     expect(screen.queryByTestId(STATUS_DRAWER_TEST_ID)).toBeNull();
-    expect(screen.queryByTestId("app-status-drawer-trigger")).toBeNull();
+    expect(screen.queryByTestId(STATUS_DRAWER_TRIGGER_TEST_ID)).toBeNull();
+  });
+
+  it("keeps an active connection warning reachable at the tablet breakpoint", () => {
+    responsiveState.breakpoint = "tablet";
+    featureState.appStatusBar = false;
+    renderSurface({
+      connection: { status: "reconnecting", error: null, issueSeverity: "unstable" },
+    });
+
+    expect(screen.getByTestId(STATUS_DRAWER_TEST_ID).getAttribute("data-connection-only")).toBe(
+      "true",
+    );
+    const trigger = screen.getByTestId(STATUS_DRAWER_TRIGGER_TEST_ID);
+    expect(trigger.className).toContain("lg:hidden");
+    expect(trigger.className).not.toContain("md:hidden");
+  });
+
+  it("closes a connection-only drawer when the warning recovers", () => {
+    responsiveState.breakpoint = "mobile";
+    featureState.appStatusBar = false;
+    renderSurface(
+      { connection: { status: "reconnecting", error: null, issueSeverity: "unstable" } },
+      <>
+        <AppStatusDrawerTrigger />
+        <ConnectionIssueControls />
+      </>,
+    );
+
+    fireEvent.click(screen.getByTestId(STATUS_DRAWER_TRIGGER_TEST_ID));
+    expect(screen.getByTestId(STATUS_DRAWER_TEST_ID).textContent).toBe("true");
+
+    fireEvent.click(screen.getByTestId("recover-connection"));
+
+    expect(screen.queryByTestId(STATUS_DRAWER_TEST_ID)).toBeNull();
+
+    fireEvent.click(screen.getByTestId("restore-connection-issue"));
+
+    expect(screen.getByTestId(STATUS_DRAWER_TEST_ID).textContent).toBe("false");
   });
 });
diff --git a/apps/web/components/app-status-bar/app-status-surface-provider.tsx b/apps/web/components/app-status-bar/app-status-surface-provider.tsx
index ef19db9a56..c6c783d6c6 100644
--- a/apps/web/components/app-status-bar/app-status-surface-provider.tsx
+++ b/apps/web/components/app-status-bar/app-status-surface-provider.tsx
@@ -3,6 +3,7 @@
 import {
   createContext,
   useContext,
+  useEffect,
   useMemo,
   useState,
   type ComponentProps,
@@ -17,9 +18,13 @@ import { useResponsiveBreakpoint } from "@/hooks/use-responsive-breakpoint";
 import { usePathname } from "@/lib/routing/client-router";
 import { AppStatusBar } from "./app-status-bar";
 import { AppStatusDrawer } from "./app-status-drawer";
+import { connectionIssueDetails } from "./connection-status-item";
+import type { ConnectionIssueSeverity } from "@/lib/types/connection";
 
 type AppStatusDrawerContextValue = {
   enabled: boolean;
+  issueSeverity: ConnectionIssueSeverity;
+  connectionOnly: boolean;
   drawerOpen: boolean;
   openStatusDrawer: () => void;
   setStatusDrawerOpen: (open: boolean) => void;
@@ -28,6 +33,8 @@ type AppStatusDrawerContextValue = {
 const AppStatusDrawerContext = createContext<AppStatusDrawerContextValue | null>(null);
 const unavailableDrawer: AppStatusDrawerContextValue = {
   enabled: false,
+  issueSeverity: "none",
+  connectionOnly: false,
   drawerOpen: false,
   openStatusDrawer: () => {},
   setStatusDrawerOpen: () => {},
@@ -50,41 +57,74 @@ export function AppStatusDrawerTrigger({
 }: AppStatusDrawerTriggerProps) {
   const drawer = useContext(AppStatusDrawerContext);
   if (!drawer?.enabled) return null;
+  const issueDetails =
+    drawer.issueSeverity === "none" ? null : connectionIssueDetails(drawer.issueSeverity);
+  const issueActive = issueDetails !== null;
+  const accessibleLabel = issueDetails?.description ?? label;
   return (
     <Button
       {...buttonProps}
       type="button"
       variant={buttonProps.variant ?? "ghost"}
       size={buttonProps.size ?? "icon"}
-      className={cn("h-11 w-11 cursor-pointer sm:hidden", className)}
-      aria-label={label}
+      className={cn(
+        "relative h-11 w-11 cursor-pointer",
+        drawerTriggerVisibilityClass(drawer.connectionOnly),
+        issueActive && (drawer.issueSeverity === "lost" ? "text-destructive" : "text-amber-500"),
+        className,
+      )}
+      aria-label={accessibleLabel}
       onClick={drawer.openStatusDrawer}
       data-testid="app-status-drawer-trigger"
+      data-connection-severity={issueActive ? drawer.issueSeverity : undefined}
     >
       {children ?? <IconActivity className="h-4 w-4" />}
+      {issueActive && (
+        <span
+          className={cn(
+            "absolute right-2 top-2 size-2 rounded-full ring-2 ring-background",
+            drawer.issueSeverity === "lost" ? "bg-destructive" : "bg-amber-500",
+          )}
+          aria-hidden="true"
+        />
+      )}
     </Button>
   );
 }
 
+function drawerTriggerVisibilityClass(connectionOnly: boolean) {
+  return connectionOnly ? "lg:hidden" : "sm:hidden";
+}
+
 export function AppStatusSurfaceProvider({ children }: { children: ReactNode }) {
   const [drawerOpen, setStatusDrawerOpen] = useState(false);
   const pathname = usePathname();
   const activeWorkspaceId = useAppStore((state) => state.workspaces.activeId);
   const activeTaskId = useAppStore((state) => state.tasks.activeTaskId);
   const activeSessionId = useAppStore((state) => state.tasks.activeSessionId);
+  const issueSeverity = useAppStore((state) => state.connection.issueSeverity);
   const appStatusBarEnabled = useFeature("appStatusBar");
-  const { isMobile, isFullDesktop } = useResponsiveBreakpoint();
-  const drawerEnabled = appStatusBarEnabled && isMobile;
+  const { isMobile, isTablet, isFullDesktop } = useResponsiveBreakpoint();
+  const connectionOnly = !appStatusBarEnabled && issueSeverity !== "none";
+  const useDrawerSurface = isMobile || (isTablet && connectionOnly);
+  const drawerEnabled = useDrawerSurface && (appStatusBarEnabled || connectionOnly);
+
+  useEffect(() => {
+    if (!drawerEnabled) setStatusDrawerOpen(false);
+  }, [drawerEnabled]);
+
   const drawer = useMemo<AppStatusDrawerContextValue>(
     () => ({
       enabled: drawerEnabled,
+      issueSeverity,
+      connectionOnly,
       drawerOpen,
       openStatusDrawer: () => {
         if (drawerEnabled) setStatusDrawerOpen(true);
       },
       setStatusDrawerOpen,
     }),
-    [drawerEnabled, drawerOpen],
+    [connectionOnly, drawerEnabled, drawerOpen, issueSeverity],
   );
   const surfaceProps = {
     pathname,
@@ -97,12 +137,13 @@ export function AppStatusSurfaceProvider({ children }: { children: ReactNode })
     <AppStatusDrawerContext.Provider value={drawer}>
       <div className="flex h-dvh min-h-0 w-full flex-col overflow-hidden">
         {children}
-        {appStatusBarEnabled &&
-          (isMobile ? (
+        {(useDrawerSurface ? drawerEnabled : appStatusBarEnabled) &&
+          (useDrawerSurface ? (
             <AppStatusDrawer
               {...surfaceProps}
               open={drawerOpen}
               onOpenChange={setStatusDrawerOpen}
+              connectionOnly={connectionOnly}
             />
           ) : (
             <AppStatusBar {...surfaceProps} density={isFullDesktop ? "full" : "compact"} />
diff --git a/apps/web/components/app-status-bar/connection-status-item.test.tsx b/apps/web/components/app-status-bar/connection-status-item.test.tsx
index a18da47734..af1e61a60d 100644
--- a/apps/web/components/app-status-bar/connection-status-item.test.tsx
+++ b/apps/web/components/app-status-bar/connection-status-item.test.tsx
@@ -1,5 +1,5 @@
 import { describe, expect, it } from "vitest";
-import { connectionStatusDetails } from "./connection-status-item";
+import { connectionIssueDetails, connectionStatusDetails } from "./connection-status-item";
 
 describe("connectionStatusDetails", () => {
   it.each([
@@ -23,4 +23,21 @@ describe("connectionStatusDetails", () => {
       animate: false,
     });
   });
+
+  it.each([
+    [
+      "unstable",
+      "Connection unstable",
+      "Connection unstable. Reconnecting to Kandev.",
+      "bg-amber-500",
+    ],
+    [
+      "lost",
+      "Connection lost",
+      "Connection lost for at least 10 seconds. Live updates may be stale.",
+      "bg-destructive",
+    ],
+  ] as const)("maps %s to a problem-only warning", (severity, label, description, dotClass) => {
+    expect(connectionIssueDetails(severity)).toMatchObject({ label, description, dotClass });
+  });
 });
diff --git a/apps/web/components/app-status-bar/connection-status-item.tsx b/apps/web/components/app-status-bar/connection-status-item.tsx
index dfa56ee257..67803db247 100644
--- a/apps/web/components/app-status-bar/connection-status-item.tsx
+++ b/apps/web/components/app-status-bar/connection-status-item.tsx
@@ -3,7 +3,7 @@
 import { Tooltip, TooltipContent, TooltipTrigger } from "@kandev/ui/tooltip";
 import { cn } from "@kandev/ui/lib/utils";
 import { useAppStore } from "@/components/state-provider";
-import type { ConnectionStatus } from "@/lib/types/connection";
+import type { ConnectionIssueSeverity, ConnectionStatus } from "@/lib/types/connection";
 
 export type ConnectionStatusDetails = {
   label: string;
@@ -12,6 +12,13 @@ export type ConnectionStatusDetails = {
   animate: boolean;
 };
 
+export type ConnectionIssueDetails = {
+  label: string;
+  description: string;
+  dotClass: string;
+  animate: boolean;
+};
+
 export function connectionStatusDetails(
   status: ConnectionStatus,
   error: string | null,
@@ -55,25 +62,53 @@ export function connectionStatusDetails(
   }
 }
 
+export function connectionIssueDetails(
+  severity: Exclude<ConnectionIssueSeverity, "none">,
+): ConnectionIssueDetails {
+  switch (severity) {
+    case "unstable":
+      return {
+        label: "Connection unstable",
+        description: "Connection unstable. Reconnecting to Kandev.",
+        dotClass: "bg-amber-500",
+        animate: false,
+      };
+    case "lost":
+      return {
+        label: "Connection lost",
+        description: "Connection lost for at least 10 seconds. Live updates may be stale.",
+        dotClass: "bg-destructive",
+        animate: false,
+      };
+  }
+}
+
 export function ConnectionStatusItem({ presentation }: { presentation: "bar" | "mobile-drawer" }) {
   const status = useAppStore((state) => state.connection.status);
   const error = useAppStore((state) => state.connection.error);
-  const details = connectionStatusDetails(status, error);
+  const severity = useAppStore((state) => state.connection.issueSeverity);
+  if (severity === "none" && presentation === "bar") return null;
+  const issueActive = severity !== "none";
+  const details = issueActive
+    ? connectionIssueDetails(severity)
+    : connectionStatusDetails(status, error);
 
   return (
     <Tooltip>
       <TooltipTrigger asChild>
         <span
           className={cn(
-            "inline-flex h-full items-center leading-none",
-            presentation === "bar" ? "w-5 justify-center" : "min-h-11 gap-3 px-1 text-sm",
+            "inline-flex items-center leading-none",
+            presentation === "bar" ? "h-full w-5 justify-center" : "min-h-11 gap-3 px-1 text-sm",
           )}
           role="status"
           aria-label={details.description}
+          tabIndex={presentation === "bar" ? 0 : undefined}
           data-testid="app-status-connection"
+          data-connection-severity={issueActive ? severity : undefined}
         >
           <span
-            className={`size-1.5 shrink-0 rounded-full ${details.dotClass} ${details.animate ? "animate-pulse" : ""}`}
+            className={`size-1.5 shrink-0 rounded-full ${details.dotClass} ${issueActive || details.animate ? "animate-pulse" : ""}`}
             aria-hidden="true"
           />
           {presentation === "bar" ? (
diff --git a/apps/web/components/kanban/kanban-header-mobile.test.tsx b/apps/web/components/kanban/kanban-header-mobile.test.tsx
index 937a6a5916..c020480fbd 100644
--- a/apps/web/components/kanban/kanban-header-mobile.test.tsx
+++ b/apps/web/components/kanban/kanban-header-mobile.test.tsx
@@ -30,17 +30,25 @@ vi.mock("./mobile-menu-sheet", () => ({
 }));
 
 const quickChatMocks = vi.hoisted(() => ({ openQuickChat: vi.fn() }));
+const statusDrawerState = vi.hoisted(() => ({
+  issueSeverity: "none" as "none" | "unstable" | "lost",
+}));
 
 vi.mock("@/hooks/use-quick-chat-launcher", () => ({
   useQuickChatLauncher: () => quickChatMocks.openQuickChat,
 }));
 
+vi.mock("@/components/app-status-bar/app-status-surface-provider", () => ({
+  useAppStatusDrawer: () => statusDrawerState,
+}));
+
 const LEFT_ACTIONS_TEST_ID = "topbar-left-actions";
 const QUICK_CHAT_TEST_ID = "mobile-quick-chat-button";
 
 afterEach(() => {
   cleanup();
   quickChatMocks.openQuickChat.mockClear();
+  statusDrawerState.issueSeverity = "none";
 });
 
 function renderHeader(title: string, workspaceId?: string, onSearchChange?: () => void) {
@@ -97,4 +105,15 @@ describe("KanbanHeaderMobile", () => {
     const search = screen.getByTestId("mobile-search-toggle");
     expect(quickChat.nextElementSibling).toBe(search);
   });
+
+  it("describes a connectivity warning on the persistent Home menu trigger", () => {
+    statusDrawerState.issueSeverity = "lost";
+    renderHeader("Home");
+
+    expect(
+      screen.getByRole("button", {
+        name: "Connection lost for at least 10 seconds. Live updates may be stale. Open menu",
+      }),
+    ).toBeTruthy();
+  });
 });
diff --git a/apps/web/components/kanban/kanban-header-mobile.tsx b/apps/web/components/kanban/kanban-header-mobile.tsx
index 5844f1e35f..f31de577f4 100644
--- a/apps/web/components/kanban/kanban-header-mobile.tsx
+++ b/apps/web/components/kanban/kanban-header-mobile.tsx
@@ -9,8 +9,11 @@ import { MainTopBarPluginActions } from "./main-top-bar-plugin-actions";
 import { MobileMenuSheet } from "./mobile-menu-sheet";
 import type { TasksListDisplayOptions } from "./mobile-menu-task-list-options";
 import { useAppStore } from "@/components/state-provider";
+import { useAppStatusDrawer } from "@/components/app-status-bar/app-status-surface-provider";
+import { connectionIssueDetails } from "@/components/app-status-bar/connection-status-item";
 import { useQuickChatLauncher } from "@/hooks/use-quick-chat-launcher";
 import { workspaceHomeHref } from "@/components/app-sidebar/app-sidebar-workspace-navigation";
+import { cn } from "@/lib/utils";
 
 type KanbanHeaderMobileProps = {
   workspaceId?: string;
@@ -57,6 +60,9 @@ function MobileHeaderActions({
   toggleSearch: () => void;
   setMenuOpen: (open: boolean) => void;
 }) {
+  const { issueSeverity } = useAppStatusDrawer();
+  const issueDetails = issueSeverity === "none" ? null : connectionIssueDetails(issueSeverity);
+
   return (
     <>
       <MainTopBarPluginActions
@@ -94,10 +100,24 @@ function MobileHeaderActions({
         variant="outline"
         size="icon-lg"
         onClick={() => setMenuOpen(true)}
-        className="cursor-pointer"
+        className={cn(
+          "relative cursor-pointer",
+          issueSeverity === "lost" && "text-destructive",
+          issueSeverity === "unstable" && "text-amber-500",
+        )}
+        aria-label={issueDetails ? `${issueDetails.description} Open menu` : "Open menu"}
+        data-connection-severity={issueSeverity === "none" ? undefined : issueSeverity}
       >
         <IconMenu2 className="h-4 w-4" />
-        <span className="sr-only">Open menu</span>
+        {issueDetails && (
+          <span
+            className={cn(
+              "absolute right-1.5 top-1.5 size-2 rounded-full ring-2 ring-background",
+              issueDetails.dotClass,
+            )}
+            aria-hidden="true"
+          />
+        )}
       </Button>
     </>
   );
diff --git a/apps/web/components/kanban/mobile-menu-sheet.tsx b/apps/web/components/kanban/mobile-menu-sheet.tsx
index f3286608a6..80ed61559b 100644
--- a/apps/web/components/kanban/mobile-menu-sheet.tsx
+++ b/apps/web/components/kanban/mobile-menu-sheet.tsx
@@ -31,6 +31,7 @@ import type { Repository, Task } from "@/lib/types/http";
 import type { WorkflowsState } from "@/lib/state/slices";
 import { useResponsiveBreakpoint } from "@/hooks/use-responsive-breakpoint";
 import { useAppStatusDrawer } from "@/components/app-status-bar/app-status-surface-provider";
+import { connectionIssueDetails } from "@/components/app-status-bar/connection-status-item";
 import { ImproveKandevDialog } from "@/components/improve-kandev-dialog";
 type MobileMenuSheetProps = {
   open: boolean;
@@ -289,7 +290,8 @@ function MobileUtilityActions({
   onOpenImproveKandev: () => void;
   onOpenChange: (open: boolean) => void;
 }) {
-  const { enabled: statusDrawerEnabled, openStatusDrawer } = useAppStatusDrawer();
+  const { enabled: statusDrawerEnabled, issueSeverity, openStatusDrawer } = useAppStatusDrawer();
+  const issueDetails = issueSeverity === "none" ? null : connectionIssueDetails(issueSeverity);
   const closeSheet = () => onOpenChange(false);
   const openHealth = () => {
     closeSheet();
@@ -307,12 +309,24 @@ function MobileUtilityActions({
         <Button
           type="button"
           variant="outline"
-          className="h-11 w-full cursor-pointer justify-start gap-3 px-3 text-sm"
+          className={cn(
+            "relative h-11 w-full cursor-pointer justify-start gap-3 px-3 text-sm",
+            issueSeverity === "lost" && "border-destructive/40 text-destructive",
+            issueSeverity === "unstable" && "border-amber-500/40 text-amber-500",
+          )}
           onClick={openStatus}
           data-testid="mobile-home-status-button"
+          aria-label={issueDetails?.description}
+          data-connection-severity={issueSeverity === "none" ? undefined : issueSeverity}
         >
           <IconActivity className={mobileControlIconClass} />
           Status
+          {issueDetails && (
+            <span
+              className={cn("ml-auto size-2 rounded-full", issueDetails.dotClass)}
+              aria-hidden="true"
+            />
+          )}
         </Button>
       )}
       <Button
diff --git a/apps/web/components/settings/settings-layout-client.tsx b/apps/web/components/settings/settings-layout-client.tsx
index 1c70021b0a..4bc34799a3 100644
--- a/apps/web/components/settings/settings-layout-client.tsx
+++ b/apps/web/components/settings/settings-layout-client.tsx
@@ -15,6 +15,8 @@ import { IntegrationCopyConfigMenu } from "@/components/integrations/integration
 import { integrationFromPathname } from "@/components/integrations/integration-copy-config";
 import { safeDecodePathSegment } from "@/lib/routing/path";
 import { SettingsSaveProvider } from "@/components/settings/settings-save-provider";
+import { connectionIssueDetails } from "@/components/app-status-bar/connection-status-item";
+import { cn } from "@/lib/utils";
 
 // Brand/initialism overrides so the derived label matches how the rest of the
 // app spells these (e.g. "github" → "GitHub", not "Github"). Anything not
@@ -143,7 +145,8 @@ function IntegrationCopyConfigAction() {
 
 function SettingsMobileMenu({ pathname }: { pathname: string }) {
   const [open, setOpen] = useState(false);
-  const { enabled: statusDrawerEnabled, openStatusDrawer } = useAppStatusDrawer();
+  const { enabled: statusDrawerEnabled, issueSeverity, openStatusDrawer } = useAppStatusDrawer();
+  const issueDetails = issueSeverity === "none" ? null : connectionIssueDetails(issueSeverity);
 
   const closeOnLinkClick = (event: MouseEvent<HTMLDivElement>) => {
     if (event.target instanceof Element && event.target.closest("a[href]")) {
@@ -162,11 +165,27 @@ function SettingsMobileMenu({ pathname }: { pathname: string }) {
           type="button"
           variant="ghost"
           size="icon"
-          className="h-11 w-11 cursor-pointer md:hidden"
-          aria-label="Open settings menu"
+          className={cn(
+            "relative h-11 w-11 cursor-pointer md:hidden",
+            issueSeverity === "lost" && "text-destructive",
+            issueSeverity === "unstable" && "text-amber-500",
+          )}
+          aria-label={
+            issueDetails ? `${issueDetails.description} Open settings menu` : "Open settings menu"
+          }
           data-testid="settings-mobile-menu-button"
+          data-connection-severity={issueSeverity === "none" ? undefined : issueSeverity}
         >
           <IconMenu2 className="h-4 w-4" />
+          {issueDetails && (
+            <span
+              className={cn(
+                "absolute right-2 top-2 size-2 rounded-full ring-2 ring-background",
+                issueDetails.dotClass,
+              )}
+              aria-hidden="true"
+            />
+          )}
         </Button>
       </SheetTrigger>
       <SheetContent
@@ -182,12 +201,24 @@ function SettingsMobileMenu({ pathname }: { pathname: string }) {
             <Button
               type="button"
               variant="ghost"
-              className="h-11 cursor-pointer justify-start gap-2.5 px-2.5"
+              className={cn(
+                "relative h-11 cursor-pointer justify-start gap-2.5 px-2.5",
+                issueSeverity === "lost" && "text-destructive",
+                issueSeverity === "unstable" && "text-amber-500",
+              )}
               onClick={openStatus}
               data-testid="settings-mobile-status-button"
+              aria-label={issueDetails?.description}
+              data-connection-severity={issueSeverity === "none" ? undefined : issueSeverity}
             >
               <IconActivity className="h-4 w-4 shrink-0" />
               <span>Status</span>
+              {issueDetails && (
+                <span
+                  className={cn("ml-auto size-2 rounded-full", issueDetails.dotClass)}
+                  aria-hidden="true"
+                />
+              )}
             </Button>
           )}
           <Link
diff --git a/apps/web/components/task/mobile/session-mobile-bottom-nav.test.tsx b/apps/web/components/task/mobile/session-mobile-bottom-nav.test.tsx
index d334a85862..f5f27e9f20 100644
--- a/apps/web/components/task/mobile/session-mobile-bottom-nav.test.tsx
+++ b/apps/web/components/task/mobile/session-mobile-bottom-nav.test.tsx
@@ -54,6 +54,23 @@ describe("SessionMobileBottomNav", () => {
     expect(onPanelChange).not.toHaveBeenCalled();
   });
 
+  it("describes an active connectivity warning on the Status action", () => {
+    render(
+      <SessionMobileBottomNav
+        activePanel="chat"
+        onPanelChange={vi.fn()}
+        showStatus
+        onOpenStatus={vi.fn()}
+        connectionIssueSeverity="lost"
+      />,
+    );
+
+    const status = screen.getByRole("button", {
+      name: "Connection lost for at least 10 seconds. Live updates may be stale.",
+    });
+    expect(status.getAttribute("data-connection-severity")).toBe("lost");
+  });
+
   it("does not reserve navigation space when Status is disabled", () => {
     render(
       <SessionMobileBottomNav
diff --git a/apps/web/components/task/mobile/session-mobile-bottom-nav.tsx b/apps/web/components/task/mobile/session-mobile-bottom-nav.tsx
index 0109e72b84..458a72cdb2 100644
--- a/apps/web/components/task/mobile/session-mobile-bottom-nav.tsx
+++ b/apps/web/components/task/mobile/session-mobile-bottom-nav.tsx
@@ -13,6 +13,8 @@ import {
 import { cn } from "@/lib/utils";
 import { Badge } from "@kandev/ui/badge";
 import type { MobileSessionPanel } from "@/lib/state/slices/ui/types";
+import type { ConnectionIssueSeverity } from "@/lib/types/connection";
+import { connectionIssueDetails } from "@/components/app-status-bar/connection-status-item";
 
 type SessionMobileBottomNavProps = {
   activePanel: MobileSessionPanel;
@@ -22,12 +24,14 @@ type SessionMobileBottomNavProps = {
   hasReview?: boolean;
   showStatus: boolean;
   onOpenStatus: () => void;
+  connectionIssueSeverity?: ConnectionIssueSeverity;
 };
 
 type NavItem = {
   label: string;
   icon: React.ReactNode;
   badge?: React.ReactNode;
+  connectionIssueSeverity?: Exclude<ConnectionIssueSeverity, "none">;
 } & ({ panel: MobileSessionPanel; onClick?: never } | { panel?: never; onClick: () => void });
 
 export function SessionMobileBottomNav({
@@ -38,6 +42,7 @@ export function SessionMobileBottomNav({
   hasReview = false,
   showStatus,
   onOpenStatus,
+  connectionIssueSeverity = "none",
 }: SessionMobileBottomNavProps) {
   const items: NavItem[] = useMemo(
     () => [
@@ -93,11 +98,12 @@ export function SessionMobileBottomNav({
               label: "Status",
               icon: <IconActivity className="h-5 w-5" />,
               onClick: onOpenStatus,
+              ...(connectionIssueSeverity !== "none" && { connectionIssueSeverity }),
             },
           ]
         : []),
     ],
-    [planBadge, changesBadge, hasReview, showStatus, onOpenStatus],
+    [planBadge, changesBadge, hasReview, showStatus, onOpenStatus, connectionIssueSeverity],
   );
 
   return (
@@ -106,24 +112,68 @@ export function SessionMobileBottomNav({
       style={{ paddingBottom: "env(safe-area-inset-bottom, 0px)" }}
     >
       {items.map((item) => (
-        <button
+        <MobileNavButton
           key={item.label}
-          type="button"
-          onClick={item.onClick ?? (() => onPanelChange(item.panel))}
-          className={cn(
-            "flex min-h-11 flex-col items-center justify-center py-2 px-3 gap-0.5 min-w-0 flex-1 transition-colors",
-            activePanel === item.panel
-              ? "text-primary"
-              : "text-muted-foreground hover:text-foreground",
-          )}
-        >
-          <span className="relative">
-            {item.icon}
-            {item.badge}
-          </span>
-          <span className="text-[10px] font-medium truncate">{item.label}</span>
-        </button>
+          item={item}
+          activePanel={activePanel}
+          onPanelChange={onPanelChange}
+        />
       ))}
     </nav>
   );
 }
+
+function MobileNavButton({
+  item,
+  activePanel,
+  onPanelChange,
+}: {
+  item: NavItem;
+  activePanel: MobileSessionPanel;
+  onPanelChange: (panel: MobileSessionPanel) => void;
+}) {
+  const issueDetails = item.connectionIssueSeverity
+    ? connectionIssueDetails(item.connectionIssueSeverity)
+    : null;
+
+  return (
+    <button
+      type="button"
+      onClick={item.onClick ?? (() => onPanelChange(item.panel))}
+      className={cn(
+        "flex min-h-11 min-w-0 flex-1 flex-col items-center justify-center gap-0.5 px-3 py-2 transition-colors",
+        mobileNavColorClass(item, activePanel, issueDetails !== null),
+      )}
+      aria-label={issueDetails?.description}
+      data-connection-severity={item.connectionIssueSeverity}
+    >
+      <span className="relative">
+        {item.icon}
+        {item.badge}
+        {issueDetails && (
+          <span
+            className={cn(
+              "absolute -right-1 -top-1 size-2 rounded-full ring-2 ring-background",
+              issueDetails.dotClass,
+            )}
+            aria-hidden="true"
+          />
+        )}
+      </span>
+      <span className="text-[10px] font-medium truncate">{item.label}</span>
+    </button>
+  );
+}
+
+function mobileNavColorClass(
+  item: NavItem,
+  activePanel: MobileSessionPanel,
+  hasConnectionIssue: boolean,
+) {
+  if (hasConnectionIssue) {
+    return item.connectionIssueSeverity === "lost" ? "text-destructive" : "text-amber-500";
+  }
+  return activePanel === item.panel
+    ? "text-primary"
+    : "text-muted-foreground hover:text-foreground";
+}
diff --git a/apps/web/components/task/mobile/session-mobile-layout.tsx b/apps/web/components/task/mobile/session-mobile-layout.tsx
index 30f76fa629..ba6e10a291 100644
--- a/apps/web/components/task/mobile/session-mobile-layout.tsx
+++ b/apps/web/components/task/mobile/session-mobile-layout.tsx
@@ -429,6 +429,7 @@ type SessionMobileFooterProps = {
   hasReview: boolean;
   showStatus: boolean;
   onOpenStatus: () => void;
+  connectionIssueSeverity: import("@/lib/types/connection").ConnectionIssueSeverity;
 };
 
 function SessionMobileFooter({
@@ -440,6 +441,7 @@ function SessionMobileFooter({
   hasReview,
   showStatus,
   onOpenStatus,
+  connectionIssueSeverity,
 }: SessionMobileFooterProps) {
   return (
     <>
@@ -456,15 +458,29 @@ function SessionMobileFooter({
         hasReview={hasReview}
         showStatus={showStatus}
         onOpenStatus={onOpenStatus}
+        connectionIssueSeverity={connectionIssueSeverity}
       />
     </>
   );
 }
 
+function StatusAwareSessionMobileFooter(
+  props: Omit<SessionMobileFooterProps, "showStatus" | "onOpenStatus" | "connectionIssueSeverity">,
+) {
+  const { enabled, issueSeverity, openStatusDrawer } = useAppStatusDrawer();
+  return (
+    <SessionMobileFooter
+      {...props}
+      showStatus={enabled}
+      onOpenStatus={openStatusDrawer}
+      connectionIssueSeverity={issueSeverity}
+    />
+  );
+}
+
 export const SessionMobileLayout = memo(function SessionMobileLayout(
   props: SessionMobileLayoutProps,
 ) {
-  const { enabled: statusDrawerEnabled, openStatusDrawer } = useAppStatusDrawer();
   const {
     activeTaskId,
     effectiveSessionId,
@@ -514,7 +530,6 @@ export const SessionMobileLayout = memo(function SessionMobileLayout(
         showApproveButton={showApproveButton}
         onApprove={handleApprove}
       />
-
       <MobilePanelArea
         currentMobilePanel={effectiveMobilePanel}
         activeTaskId={activeTaskId}
@@ -537,15 +552,13 @@ export const SessionMobileLayout = memo(function SessionMobileLayout(
         onSelectReviewPR={mobilePR.selectPR}
       />
 
-      <SessionMobileFooter
+      <StatusAwareSessionMobileFooter
         sessionId={effectiveSessionId ?? null}
         activePanel={effectiveMobilePanel}
         onPanelChange={handleMobilePanelChange}
         planBadge={hasUnseenPlanUpdate}
         changesBadge={totalChangesCount}
         hasReview={reviewSource !== null}
-        showStatus={statusDrawerEnabled}
-        onOpenStatus={openStatusDrawer}
       />
 
       {/* Task Switcher Sheet */}
diff --git a/apps/web/e2e/tests/layout/app-status-bar.spec.ts b/apps/web/e2e/tests/layout/app-status-bar.spec.ts
index 6f4dd261fd..2627c204d6 100644
--- a/apps/web/e2e/tests/layout/app-status-bar.spec.ts
+++ b/apps/web/e2e/tests/layout/app-status-bar.spec.ts
@@ -1,8 +1,10 @@
 import { expect, test } from "../../fixtures/test-base";
+import type { Page } from "@playwright/test";
 
 test.describe("App status bar", () => {
   test("uses one 24px in-flow footer across sidebar and route content", async ({ testPage }) => {
     await testPage.goto("/");
+    await setConnectionIssueSeverity(testPage, "unstable");
 
     const bar = testPage.getByTestId("app-status-bar");
     await expect(bar).toBeVisible();
@@ -40,6 +42,7 @@ test.describe("App status bar", () => {
 
   test("persists a modifier-mouse move across the spacer", async ({ testPage }) => {
     await testPage.goto("/");
+    await setConnectionIssueSeverity(testPage, "unstable");
     const bar = testPage.getByTestId("app-status-bar");
     const connection = bar.locator('[data-status-item-id="builtin:connection"]');
     const [sourceBox, barBox] = await Promise.all([connection.boundingBox(), bar.boundingBox()]);
@@ -69,3 +72,17 @@ test.describe("App status bar", () => {
     ).toHaveAttribute("data-status-side", "right");
   });
 });
+
+async function setConnectionIssueSeverity(page: Page, severity: "none" | "unstable" | "lost") {
+  await page.evaluate((nextSeverity) => {
+    const store = (
+      window as Window & {
+        __KANDEV_E2E_STORE__?: {
+          getState: () => { setConnectionIssueSeverity: (severity: typeof nextSeverity) => void };
+        };
+      }
+    ).__KANDEV_E2E_STORE__;
+    if (!store) throw new Error("E2E store bridge missing");
+    store.getState().setConnectionIssueSeverity(nextSeverity);
+  }, severity);
+}
diff --git a/apps/web/e2e/tests/layout/mobile-ws-connectivity-warning.spec.ts b/apps/web/e2e/tests/layout/mobile-ws-connectivity-warning.spec.ts
new file mode 100644
index 0000000000..aa33ad0da9
--- /dev/null
+++ b/apps/web/e2e/tests/layout/mobile-ws-connectivity-warning.spec.ts
@@ -0,0 +1,83 @@
+import type { Page } from "@playwright/test";
+import { expect, test } from "../../fixtures/test-base";
+
+test.describe("Mobile WebSocket connectivity warning", () => {
+  test("opens a touch-sized connection-only Status drawer while the feature is disabled", async ({
+    testPage,
+    prCapture,
+  }) => {
+    await testPage.goto("/stats");
+    await setAppStatusBarEnabled(testPage, false);
+    await setConnectionIssueSeverity(testPage, "lost");
+
+    await expect(testPage.getByTestId("app-status-bar")).toHaveCount(0);
+    const trigger = testPage.getByTestId("app-status-drawer-trigger");
+    await expect(trigger).toHaveAttribute(
+      "aria-label",
+      "Connection lost for at least 10 seconds. Live updates may be stale.",
+    );
+    await expect(trigger).toHaveAttribute("data-connection-severity", "lost");
+    expect((await trigger.boundingBox())?.height).toBeGreaterThanOrEqual(44);
+
+    await trigger.click();
+    const drawer = testPage.getByTestId("app-status-drawer");
+    await expect(drawer).toBeVisible();
+    await expect(drawer.locator("[data-status-item-id]")).toHaveCount(1);
+    await expect(drawer.getByTestId("app-status-connection")).toHaveAttribute(
+      "aria-label",
+      "Connection lost for at least 10 seconds. Live updates may be stale.",
+    );
+    await prCapture.screenshot("mobile-warning-drawer", {
+      caption: "Mobile connection-only WebSocket warning drawer",
+    });
+    expect(await testPage.evaluate(() => document.documentElement.scrollWidth)).toBe(
+      await testPage.evaluate(() => document.documentElement.clientWidth),
+    );
+
+    await testPage.keyboard.press("Escape");
+    await expect(drawer).toBeHidden();
+    await expect(trigger).toBeFocused();
+
+    await setConnectionIssueSeverity(testPage, "none");
+    await expect(trigger).toHaveCount(0);
+  });
+
+  test("keeps the connection-only trigger visible on a coarse-pointer tablet", async ({
+    testPage,
+  }) => {
+    await testPage.setViewportSize({ width: 900, height: 900 });
+    await testPage.goto("/stats");
+    await setAppStatusBarEnabled(testPage, false);
+    await setConnectionIssueSeverity(testPage, "unstable");
+
+    const trigger = testPage.getByTestId("app-status-drawer-trigger");
+    await expect(trigger).toBeVisible();
+    await trigger.tap();
+    await expect(testPage.getByTestId("app-status-drawer")).toBeVisible();
+  });
+});
+
+type E2EStore = {
+  getState: () => {
+    features: Record<string, boolean>;
+    setFeatures: (features: Record<string, boolean>) => void;
+    setConnectionIssueSeverity: (severity: "none" | "unstable" | "lost") => void;
+  };
+};
+
+async function setConnectionIssueSeverity(page: Page, severity: "none" | "unstable" | "lost") {
+  await page.evaluate((nextSeverity) => {
+    const store = (window as Window & { __KANDEV_E2E_STORE__?: E2EStore }).__KANDEV_E2E_STORE__;
+    if (!store) throw new Error("E2E store bridge missing");
+    store.getState().setConnectionIssueSeverity(nextSeverity);
+  }, severity);
+}
+
+async function setAppStatusBarEnabled(page: Page, enabled: boolean) {
+  await page.evaluate((nextEnabled) => {
+    const store = (window as Window & { __KANDEV_E2E_STORE__?: E2EStore }).__KANDEV_E2E_STORE__;
+    if (!store) throw new Error("E2E store bridge missing");
+    const state = store.getState();
+    state.setFeatures({ ...state.features, appStatusBar: nextEnabled });
+  }, enabled);
+}
diff --git a/apps/web/e2e/tests/layout/ws-connectivity-warning.spec.ts b/apps/web/e2e/tests/layout/ws-connectivity-warning.spec.ts
new file mode 100644
index 0000000000..78139152f6
--- /dev/null
+++ b/apps/web/e2e/tests/layout/ws-connectivity-warning.spec.ts
@@ -0,0 +1,96 @@
+import type { Page } from "@playwright/test";
+import { expect, test } from "../../fixtures/test-base";
+
+test.describe("WebSocket connectivity warning", () => {
+  test("shows one bottom-bar warning while the app status bar is enabled", async ({
+    testPage,
+    prCapture,
+  }) => {
+    await testPage.goto("/");
+    await setConnectionIssueSeverity(testPage, "unstable");
+
+    const warning = testPage.getByTestId("app-status-connection");
+    await expect(warning).toHaveAttribute(
+      "aria-label",
+      "Connection unstable. Reconnecting to Kandev.",
+    );
+    await expect(warning).toHaveAttribute("data-connection-severity", "unstable");
+    await expect(testPage.getByTestId("sidebar-connection-warning")).toHaveCount(0);
+    await prCapture.screenshot("desktop-warning", {
+      caption: "Desktop yellow WebSocket connectivity warning",
+    });
+
+    await setConnectionIssueSeverity(testPage, "lost");
+    await expect(warning).toHaveAttribute(
+      "aria-label",
+      "Connection lost for at least 10 seconds. Live updates may be stale.",
+    );
+
+    await setConnectionIssueSeverity(testPage, "none");
+    await expect(warning).toHaveCount(0);
+  });
+
+  test("uses the sidebar fallback when the app status bar is disabled", async ({ testPage }) => {
+    await testPage.goto("/");
+    await setAppStatusBarEnabled(testPage, false);
+    await setConnectionIssueSeverity(testPage, "unstable");
+
+    await expect(testPage.getByTestId("app-status-bar")).toHaveCount(0);
+    const warning = testPage.getByTestId("sidebar-connection-warning");
+    await expect(warning).toHaveAttribute(
+      "aria-label",
+      "Connection unstable. Reconnecting to Kandev.",
+    );
+    await expect(warning).toHaveAttribute("data-connection-severity", "unstable");
+    await warning.focus();
+    await expect(testPage.getByRole("tooltip")).toContainText("Connection unstable");
+
+    await setConnectionIssueSeverity(testPage, "none");
+    await expect(warning).toHaveCount(0);
+  });
+
+  test("keeps a connection-only warning reachable on tablet widths", async ({ testPage }) => {
+    await testPage.setViewportSize({ width: 700, height: 900 });
+    await testPage.goto("/stats");
+    await setAppStatusBarEnabled(testPage, false);
+    await setConnectionIssueSeverity(testPage, "unstable");
+
+    await expect(testPage.getByTestId("app-status-bar")).toHaveCount(0);
+    const trigger = testPage.getByTestId("app-status-drawer-trigger");
+    await expect(trigger).toBeVisible();
+    await expect(trigger).toHaveAttribute(
+      "aria-label",
+      "Connection unstable. Reconnecting to Kandev.",
+    );
+
+    await trigger.click();
+    const drawer = testPage.getByTestId("app-status-drawer");
+    await expect(drawer).toBeVisible();
+    await expect(drawer.locator("[data-status-item-id]")).toHaveCount(1);
+  });
+});
+
+type E2EStore = {
+  getState: () => {
+    features: Record<string, boolean>;
+    setFeatures: (features: Record<string, boolean>) => void;
+    setConnectionIssueSeverity: (severity: "none" | "unstable" | "lost") => void;
+  };
+};
+
+async function setConnectionIssueSeverity(page: Page, severity: "none" | "unstable" | "lost") {
+  await page.evaluate((nextSeverity) => {
+    const store = (window as Window & { __KANDEV_E2E_STORE__?: E2EStore }).__KANDEV_E2E_STORE__;
+    if (!store) throw new Error("E2E store bridge missing");
+    store.getState().setConnectionIssueSeverity(nextSeverity);
+  }, severity);
+}
+
+async function setAppStatusBarEnabled(page: Page, enabled: boolean) {
+  await page.evaluate((nextEnabled) => {
+    const store = (window as Window & { __KANDEV_E2E_STORE__?: E2EStore }).__KANDEV_E2E_STORE__;
+    if (!store) throw new Error("E2E store bridge missing");
+    const state = store.getState();
+    state.setFeatures({ ...state.features, appStatusBar: nextEnabled });
+  }, enabled);
+}
diff --git a/apps/web/lib/state/slices/ui/types.ts b/apps/web/lib/state/slices/ui/types.ts
index 20249630c6..57b3b49108 100644
--- a/apps/web/lib/state/slices/ui/types.ts
+++ b/apps/web/lib/state/slices/ui/types.ts
@@ -1,4 +1,4 @@
-import type { ConnectionStatus } from "@/lib/types/connection";
+import type { ConnectionIssueSeverity, ConnectionStatus } from "@/lib/types/connection";
 import type { HealthCheckSummary, HealthIssue, SystemHealthResponse } from "@/lib/types/health";
 import type { StateSnapshot } from "react-virtuoso";
 import type {
@@ -34,6 +34,7 @@ export type DiffState = {
 export type ConnectionState = {
   status: ConnectionStatus;
   error: string | null;
+  issueSeverity: ConnectionIssueSeverity;
 };
 
 export type MobileKanbanState = {
@@ -213,6 +214,7 @@ export type UISliceActions = {
   setPreviewUrlDraft: (sessionId: string, url: string) => void;
   setRightPanelActiveTab: (sessionId: string, tab: string) => void;
   setConnectionStatus: (status: ConnectionState["status"], error?: string | null) => void;
+  setConnectionIssueSeverity: (severity: ConnectionIssueSeverity) => void;
   setMobileKanbanColumnIndex: (index: number) => void;
   setMobileKanbanMenuOpen: (open: boolean) => void;
   setMobileKanbanSearchOpen: (open: boolean) => void;
diff --git a/apps/web/lib/state/slices/ui/ui-slice.ts b/apps/web/lib/state/slices/ui/ui-slice.ts
index 0b33ee67ac..ecbe347d77 100644
--- a/apps/web/lib/state/slices/ui/ui-slice.ts
+++ b/apps/web/lib/state/slices/ui/ui-slice.ts
@@ -80,7 +80,7 @@ export const defaultUIState: UISliceState = {
   },
   rightPanel: { activeTabBySessionId: {} },
   diffs: { files: [] },
-  connection: { status: "disconnected", error: null },
+  connection: { status: "disconnected", error: null, issueSeverity: "none" },
   mobileKanban: { activeColumnIndex: 0, isMenuOpen: false, isSearchOpen: false },
   mobileSession: {
     activePanelBySessionId: {},
@@ -456,6 +456,10 @@ export const createUISlice: StateCreator<UISlice, [["zustand/immer", never]], []
       draft.connection.status = status;
       draft.connection.error = error ?? null;
     }),
+  setConnectionIssueSeverity: (severity) =>
+    set((draft) => {
+      draft.connection.issueSeverity = severity;
+    }),
   setPlanMode: (sessionId, enabled) =>
     set((draft) => {
       draft.chatInput.planModeBySessionId[sessionId] = enabled;
diff --git a/apps/web/lib/state/store.test.ts b/apps/web/lib/state/store.test.ts
index 787bc500a7..6cb597f313 100644
--- a/apps/web/lib/state/store.test.ts
+++ b/apps/web/lib/state/store.test.ts
@@ -59,4 +59,10 @@ describe("createAppStore", () => {
       "task-2": "acme/widget/2",
     });
   });
+
+  it("starts with no connection issue severity", () => {
+    const store = createAppStore();
+
+    expect((store.getState().connection as { issueSeverity?: string }).issueSeverity).toBe("none");
+  });
 });
diff --git a/apps/web/lib/state/store.ts b/apps/web/lib/state/store.ts
index 2c9daaae70..edcfaeca89 100644
--- a/apps/web/lib/state/store.ts
+++ b/apps/web/lib/state/store.ts
@@ -317,6 +317,9 @@ export type AppState = KanbanSlice & {
   setPreviewUrlDraft: (sessionId: string, url: string) => void;
   setRightPanelActiveTab: (sessionId: string, tab: string) => void;
   setConnectionStatus: (status: ConnectionState["status"], error?: string | null) => void;
+  setConnectionIssueSeverity: (
+    severity: import("@/lib/types/connection").ConnectionIssueSeverity,
+  ) => void;
   setMobileKanbanColumnIndex: (index: number) => void;
   setMobileKanbanMenuOpen: (open: boolean) => void;
   setMobileKanbanSearchOpen: (open: boolean) => void;
diff --git a/apps/web/lib/types/connection.ts b/apps/web/lib/types/connection.ts
index 8617bfb3d4..e0fe2659b3 100644
--- a/apps/web/lib/types/connection.ts
+++ b/apps/web/lib/types/connection.ts
@@ -13,3 +13,5 @@ export type ConnectionStatus =
   | "connected"
   | "error"
   | "reconnecting";
+
+export type ConnectionIssueSeverity = "none" | "unstable" | "lost";
diff --git a/apps/web/lib/ws/connection-issue-monitor.test.ts b/apps/web/lib/ws/connection-issue-monitor.test.ts
new file mode 100644
index 0000000000..bb6fedb14a
--- /dev/null
+++ b/apps/web/lib/ws/connection-issue-monitor.test.ts
@@ -0,0 +1,70 @@
+import { afterEach, describe, expect, it, vi } from "vitest";
+import { ConnectionIssueMonitor } from "./connection-issue-monitor";
+
+describe("ConnectionIssueMonitor", () => {
+  afterEach(() => vi.useRealTimers());
+
+  it("waits three seconds before reporting an unstable connection", () => {
+    vi.useFakeTimers();
+    const onChange = vi.fn();
+    const monitor = new ConnectionIssueMonitor(onChange);
+
+    monitor.onStatusChange("connecting");
+    vi.advanceTimersByTime(2_999);
+
+    expect(onChange).not.toHaveBeenCalled();
+
+    vi.advanceTimersByTime(1);
+
+    expect(onChange).toHaveBeenCalledWith("unstable");
+  });
+
+  it("keeps one outage clock across reconnect lifecycle transitions", () => {
+    vi.useFakeTimers();
+    const onChange = vi.fn();
+    const monitor = new ConnectionIssueMonitor(onChange);
+
+    monitor.onStatusChange("reconnecting");
+    vi.advanceTimersByTime(3_000);
+    monitor.onStatusChange("connecting");
+    monitor.onStatusChange("error");
+    vi.advanceTimersByTime(7_000);
+
+    expect(onChange).toHaveBeenNthCalledWith(1, "unstable");
+    expect(onChange).toHaveBeenNthCalledWith(2, "lost");
+  });
+
+  it("clears immediately on connection and starts a later outage fresh", () => {
+    vi.useFakeTimers();
+    const onChange = vi.fn();
+    const monitor = new ConnectionIssueMonitor(onChange);
+
+    monitor.onStatusChange("disconnected");
+    vi.advanceTimersByTime(3_000);
+    monitor.onStatusChange("connected");
+    monitor.onStatusChange("reconnecting");
+    vi.advanceTimersByTime(2_999);
+
+    expect(onChange).toHaveBeenNthCalledWith(1, "unstable");
+    expect(onChange).toHaveBeenNthCalledWith(2, "none");
+    expect(onChange).toHaveBeenCalledTimes(2);
+
+    vi.advanceTimersByTime(1);
+
+    expect(onChange).toHaveBeenNthCalledWith(3, "unstable");
+    expect(onChange).toHaveBeenCalledTimes(3);
+  });
+
+  it("clears scheduled timers and ignores later status changes after disposal", () => {
+    vi.useFakeTimers();
+    const onChange = vi.fn();
+    const monitor = new ConnectionIssueMonitor(onChange);
+
+    monitor.onStatusChange("reconnecting");
+    monitor.dispose();
+    monitor.onStatusChange("reconnecting");
+    vi.advanceTimersByTime(10_000);
+
+    expect(onChange).not.toHaveBeenCalled();
+  });
+});
diff --git a/apps/web/lib/ws/connection-issue-monitor.ts b/apps/web/lib/ws/connection-issue-monitor.ts
new file mode 100644
index 0000000000..b781d6ec9b
--- /dev/null
+++ b/apps/web/lib/ws/connection-issue-monitor.ts
@@ -0,0 +1,55 @@
+import type { ConnectionIssueSeverity, ConnectionStatus } from "@/lib/types/connection";
+
+const UNSTABLE_DELAY_MS = 3_000;
+const LOST_DELAY_MS = 10_000;
+
+export class ConnectionIssueMonitor {
+  private disposed = false;
+  private offline = false;
+  private severity: ConnectionIssueSeverity = "none";
+  private unstableTimer: ReturnType<typeof setTimeout> | null = null;
+  private lostTimer: ReturnType<typeof setTimeout> | null = null;
+
+  constructor(private onSeverityChange: (severity: ConnectionIssueSeverity) => void) {}
+
+  onStatusChange(status: ConnectionStatus) {
+    if (this.disposed) {
+      return;
+    }
+
+    if (status === "connected") {
+      this.reset();
+      return;
+    }
+    if (this.offline) return;
+
+    this.offline = true;
+    this.unstableTimer = setTimeout(() => this.reportSeverity("unstable"), UNSTABLE_DELAY_MS);
+    this.lostTimer = setTimeout(() => this.reportSeverity("lost"), LOST_DELAY_MS);
+  }
+
+  dispose() {
+    if (this.disposed) return;
+    this.reset();
+    this.disposed = true;
+  }
+
+  private reset() {
+    this.offline = false;
+    this.clearTimers();
+    if (this.severity !== "none") this.reportSeverity("none");
+  }
+
+  private reportSeverity(severity: ConnectionIssueSeverity) {
+    if (this.disposed) return;
+    this.severity = severity;
+    this.onSeverityChange(severity);
+  }
+
+  private clearTimers() {
+    if (this.unstableTimer) clearTimeout(this.unstableTimer);
+    if (this.lostTimer) clearTimeout(this.lostTimer);
+    this.unstableTimer = null;
+    this.lostTimer = null;
+  }
+}
diff --git a/apps/web/lib/ws/use-websocket.test.tsx b/apps/web/lib/ws/use-websocket.test.tsx
new file mode 100644
index 0000000000..9d8bef902e
--- /dev/null
+++ b/apps/web/lib/ws/use-websocket.test.tsx
@@ -0,0 +1,71 @@
+import { act, renderHook } from "@testing-library/react";
+import { afterEach, describe, expect, it, vi } from "vitest";
+import type { ConnectionStatus } from "@/lib/types/connection";
+import { createAppStore } from "@/lib/state/store";
+import { useWebSocket } from "./use-websocket";
+
+const mocks = vi.hoisted(() => ({
+  onStatusChange: null as ((status: ConnectionStatus) => void) | null,
+}));
+
+vi.mock("@/lib/ws/client", () => ({
+  WebSocketClient: class {
+    constructor(_url: string, onStatusChange: (status: ConnectionStatus) => void) {
+      mocks.onStatusChange = onStatusChange;
+    }
+
+    connect = vi.fn();
+    disconnect = vi.fn();
+    subscribeUser = vi.fn();
+    on = vi.fn(() => vi.fn());
+  },
+}));
+
+vi.mock("@/lib/ws/router", () => ({ registerWsHandlers: vi.fn(() => ({})) }));
+vi.mock("@/lib/ws/connection", () => ({ setWebSocketClient: vi.fn() }));
+vi.mock("@/lib/debug/log", () => ({ createDebugLogger: () => vi.fn() }));
+
+describe("useWebSocket", () => {
+  afterEach(() => {
+    mocks.onStatusChange = null;
+    vi.useRealTimers();
+  });
+
+  it("reflects a sustained WebSocket outage in the UI store and clears on reconnect", () => {
+    vi.useFakeTimers();
+    const store = createAppStore();
+    const { unmount } = renderHook(() => useWebSocket(store, "ws://kandev.test/ws"));
+
+    act(() => {
+      mocks.onStatusChange?.("reconnecting");
+      vi.advanceTimersByTime(3_000);
+    });
+
+    expect(store.getState().connection.issueSeverity).toBe("unstable");
+
+    act(() => mocks.onStatusChange?.("connected"));
+
+    expect(store.getState().connection.issueSeverity).toBe("none");
+    unmount();
+  });
+
+  it("clears an active outage when replacing the WebSocket URL", () => {
+    vi.useFakeTimers();
+    const store = createAppStore();
+    const { rerender, unmount } = renderHook(
+      ({ url }: { url: string }) => useWebSocket(store, url),
+      { initialProps: { url: "ws://kandev.test/first" } },
+    );
+
+    act(() => {
+      mocks.onStatusChange?.("reconnecting");
+      vi.advanceTimersByTime(3_000);
+    });
+    expect(store.getState().connection.issueSeverity).toBe("unstable");
+
+    rerender({ url: "ws://kandev.test/replacement" });
+
+    expect(store.getState().connection.issueSeverity).toBe("none");
+    unmount();
+  });
+});
diff --git a/apps/web/lib/ws/use-websocket.tsx b/apps/web/lib/ws/use-websocket.tsx
index 789803a382..aca54ce79c 100644
--- a/apps/web/lib/ws/use-websocket.tsx
+++ b/apps/web/lib/ws/use-websocket.tsx
@@ -7,6 +7,7 @@ import { registerWsHandlers } from "@/lib/ws/router";
 import type { AppState } from "@/lib/state/store";
 import { setWebSocketClient } from "@/lib/ws/connection";
 import { createDebugLogger } from "@/lib/debug/log";
+import { ConnectionIssueMonitor } from "@/lib/ws/connection-issue-monitor";
 
 const debug = createDebugLogger("ws:connection");
 
@@ -15,9 +16,13 @@ export function useWebSocket(store: StoreApi<AppState>, url: string) {
 
   useEffect(() => {
     debug("WS hook mounting", { url });
+    const connectionIssueMonitor = new ConnectionIssueMonitor((severity) => {
+      store.getState().setConnectionIssueSeverity(severity);
+    });
     const client = new WebSocketClient(
       url,
       (status) => {
+        connectionIssueMonitor.onStatusChange(status);
         const setConnectionStatus = store.getState().setConnectionStatus;
         debug("status transition", { status, timestamp: new Date().toISOString() });
         // WS client and ConnectionState share one ConnectionStatus vocabulary,
@@ -47,6 +52,7 @@ export function useWebSocket(store: StoreApi<AppState>, url: string) {
 
     return () => {
       unsubscribers.forEach((unsubscribe) => unsubscribe());
+      connectionIssueMonitor.dispose();
       client.disconnect();
       setWebSocketClient(null);
     };
diff --git a/docs/plans/ws-connectivity-warning/plan.md b/docs/plans/ws-connectivity-warning/plan.md
new file mode 100644
index 0000000000..96d1251885
--- /dev/null
+++ b/docs/plans/ws-connectivity-warning/plan.md
@@ -0,0 +1,199 @@
+---
+spec: docs/specs/ui/ws-connectivity-warning.md
+created: 2026-07-30
+status: complete
+---
+
+# Implementation Plan: WebSocket Connectivity Warning
+
+## Overview
+
+Derive one time-based issue severity beside the existing WebSocket lifecycle, then project it into
+the existing App status bar, the desktop/sidebar fallback, and native phone Status paths. The
+timing owner lands first so every surface shares the same continuous outage clock. Desktop and
+mobile presentation tasks follow, then focused production-build E2E and public documentation.
+
+No backend, schema, HTTP, or WebSocket protocol change is required.
+
+---
+
+## Backend
+
+None. The feature consumes the existing frontend `ConnectionStatus` transitions and leaves the
+backend gateway, retry policy, and subscription protocol unchanged.
+
+---
+
+## Frontend
+
+### Canonical issue timing
+
+- Add `ConnectionIssueSeverity = "none" | "unstable" | "lost"` in
+  `apps/web/lib/types/connection.ts`.
+- Extend the transient `ConnectionState` in
+  `apps/web/lib/state/slices/ui/types.ts`,
+  `apps/web/lib/state/slices/ui/ui-slice.ts`, and `apps/web/lib/state/store.ts` with the current
+  issue severity and an action that updates it. The default is `none`; hydration remains
+  non-persistent.
+- Add a small timer owner in `apps/web/lib/ws/connection-issue-monitor.ts`. It treats every
+  non-`connected` status as one continuous interval, emits `unstable` at 3,000 ms and `lost` at
+  10,000 ms, clears immediately on `connected`, and cancels both timers on disposal.
+- Wire that owner into the single `apps/web/lib/ws/use-websocket.tsx` lifecycle. Raw connection
+  status/error updates, retry options, and subscription behavior remain unchanged.
+
+### Desktop and tablet presentation
+
+- Refine `apps/web/components/app-status-bar/connection-status-item.tsx` so the bar presentation
+  returns no content for `none`, renders the exact yellow/red copy for an active issue, and keeps
+  complete healthy/raw connection detail in the manually opened phone drawer.
+- Reuse the same semantic detail mapping in a focusable sidebar warning indicator rather than
+  duplicating color/copy decisions.
+- Update `apps/web/components/app-sidebar/app-sidebar-footer.tsx` to render that indicator
+  immediately after `ThemeToggle` only when `features.appStatusBar` is off and issue severity is
+  active. The sidebar remains the persistent tablet/desktop fallback in both expanded and collapsed
+  layouts.
+- Preserve `builtin:connection` ordering. Its desktop wrapper remains present in the saved order but
+  collapses through the existing `empty:hidden` behavior while no warning content renders.
+
+### Phone presentation
+
+- Extend `AppStatusDrawerContextValue` in
+  `apps/web/components/app-status-bar/app-status-surface-provider.tsx` with issue severity and
+  whether the drawer is an issue-only fallback.
+- On phone, enable Status access when either `features.appStatusBar` is on or an issue is active.
+  When only the issue activates it, mount `apps/web/components/app-status-bar/app-status-drawer.tsx`
+  in connection-only mode; do not mount metrics or plugin contributions.
+- Apply shared yellow/red styling and accessible warning text to
+  `AppStatusDrawerTrigger`. Existing Page and Office top-bar triggers inherit it without route-local
+  state logic.
+- Propagate the same severity to custom native paths:
+  `apps/web/components/kanban/kanban-header-mobile.tsx`,
+  `apps/web/components/kanban/mobile-menu-sheet.tsx`,
+  `apps/web/components/settings/settings-layout-client.tsx`,
+  `apps/web/components/task/mobile/session-mobile-layout.tsx`, and
+  `apps/web/components/task/mobile/session-mobile-bottom-nav.tsx`.
+- Home/Settings menu triggers show the warning before their nested Status row is opened. Task
+  bottom navigation and direct Page/Office top-bar Status controls show it directly.
+
+### Mobile design contract
+
+- **Desktop outcome / phone entry:** desktop uses the enabled bottom status item or sidebar-footer
+  fallback; phone uses the route's existing top-bar, bottom-nav, or menu Status path.
+- **Nearest exemplar:** the shipped `AppStatusDrawer` supplies the inset bottom drawer, fixed
+  summary, safe-area clearance, 44 px rows, single internal scroll owner, dismissal, and focus
+  return.
+- **Hierarchy:** persistent chrome communicates severity; opening Status reveals the exact
+  connection explanation. No healthy-state phone chrome is added when the general status feature is
+  off.
+- **Presentation:** an inset drawer fits one short, temporary diagnostic better than a new route or
+  full-height surface.
+- **Shared logic:** the Zustand issue severity and detail mapper are common; phone code only selects
+  and styles touch presentation.
+- **Geometry:** existing `h-dvh` shell, drawer `100dvh` bounds, safe-area padding, and 44 px native
+  controls remain authoritative. No additional document scroll owner is introduced.
+
+---
+
+## Tests
+
+- **Continuous interval thresholds and reset**
+  - **File:** `apps/web/lib/ws/connection-issue-monitor.test.ts`
+  - **How:** Vitest fake timers prove no signal before 3 seconds, `unstable` at 3 seconds, `lost`
+    at 10 seconds, raw non-connected transitions do not reset time, `connected` clears immediately,
+    a later outage starts fresh, and dispose suppresses pending emissions.
+- **Store and lifecycle wiring**
+  - **Files:** `apps/web/lib/state/store.test.ts` and, if needed for the lifecycle boundary,
+    `apps/web/lib/ws/use-websocket.test.tsx`
+  - **How:** focused unit tests prove the derived severity reaches the canonical store without
+    changing raw `ConnectionStatus` forwarding.
+- **Connection details and desktop fallback**
+  - **Files:** `apps/web/components/app-status-bar/connection-status-item.test.tsx`,
+    `apps/web/components/app-sidebar/app-sidebar-footer.test.tsx`, and
+    `apps/web/components/app-status-bar/app-status-bar.test.tsx`
+  - **How:** component tests cover exact accessible copy/color, healthy bar collapse, enabled-bar
+    exclusivity, feature-off sidebar fallback, and collapsed-sidebar focus/tooltip access.
+- **Phone visibility gate and native controls**
+  - **Files:** `apps/web/components/app-status-bar/app-status-surface-provider.test.tsx`,
+    `apps/web/components/app-status-bar/app-status-drawer.test.tsx`,
+    `apps/web/components/kanban/kanban-header-mobile.test.tsx`,
+    `apps/web/components/settings/settings-layout-client.test.tsx`, and
+    `apps/web/components/task/mobile/session-mobile-bottom-nav.test.tsx`
+  - **How:** component tests cover feature-on ordinary access, feature-off healthy absence,
+    feature-off warning access, connection-only drawer contents, severity styling, 44 px controls,
+    and unchanged actions/focus behavior.
+
+There is no handler/service/repository integration path to test because the feature is frontend-only.
+The production-build Playwright scenarios below provide the cross-component integration proof.
+
+---
+
+## E2E Tests
+
+- **Scenario:** App status bar enabled on desktop; setting issue severity shows exactly one bottom
+  yellow/red connection item and clearing it removes the item content.
+  - **File:** `apps/web/e2e/tests/layout/ws-connectivity-warning.spec.ts`
+  - **What to verify:** semantic copy, yellow/red treatment, no sidebar duplicate, and recovery.
+- **Scenario:** App status bar disabled on desktop/tablet; an issue shows the sidebar-footer
+  fallback beside the theme control and no bottom bar.
+  - **File:** `apps/web/e2e/tests/layout/ws-connectivity-warning.spec.ts`
+  - **What to verify:** feature-off placement, hover/focus detail, severity transition, and recovery.
+- **Scenario:** App status bar disabled on Pixel 5; an issue marks persistent route chrome, exposes a
+  44 px Status path, and opens a connection-only drawer.
+  - **File:** `apps/web/e2e/tests/layout/mobile-ws-connectivity-warning.spec.ts`
+  - **What to verify:** warning is discoverable before nested navigation, only connection detail
+    renders, viewport containment, focus return, safe-area/internal scrolling, no horizontal
+    overflow, and recovery hides the issue-only path.
+
+The tests may use the existing E2E store bridge to inject derived severity; unit tests own the
+3/10-second clock so Playwright does not add ten-second sleeps or alter WebSocket accounting.
+
+---
+
+## Public documentation
+
+- Amend `docs/public/operations.md` to explain the 3-second yellow / 10-second red warning,
+  its placement with App status bar on or off, and that red means live data may be stale.
+- Amend the `features.app_status_bar` row in `docs/public/configuration.md` so disabling the general
+  status surface does not imply that urgent connectivity warnings disappear.
+- No new page or navigation entry is needed.
+
+---
+
+## Implementation Waves And Parallel Candidates
+
+Execution remains sequential in the primary conversation.
+
+Wave 1:
+
+- [x] [task-01-connection-issue-timing](task-01-connection-issue-timing.md)
+
+Wave 2:
+
+- [x] [task-02-desktop-warning-surfaces](task-02-desktop-warning-surfaces.md)
+
+Wave 3:
+
+- [x] [task-03-mobile-warning-surfaces](task-03-mobile-warning-surfaces.md)
+
+Wave 4:
+
+- [x] [task-04-connectivity-warning-e2e](task-04-connectivity-warning-e2e.md)
+- [x] [task-05-public-documentation](task-05-public-documentation.md)
+
+Tasks 02 and 03 both consume shared status components/provider contracts, so they are not marked
+parallel-safe. Task 04 depends on both rendered paths. Task 05 is logically independent after the
+spec but stays sequential to keep documented copy aligned with the final UI.
+
+---
+
+## Risks
+
+- Raw `error → disconnected → reconnecting → connecting` churn can accidentally reset a
+  component-local timer; the timer must live once beside `useWebSocket`.
+- A feature-off issue-only phone drawer must filter before rendering contributions, or plugin
+  effects and metrics subscriptions could run despite the toggle.
+- Home and Settings hide Status inside a menu, so their persistent menu triggers must carry the
+  warning; styling only the nested row would fail discoverability.
+- Existing E2E status-bar ordering assumes a visible healthy connection dot. Its geometry/order
+  assertions must be updated to inject an issue where connection-item visibility is material,
+  without changing saved identity semantics.
diff --git a/docs/plans/ws-connectivity-warning/task-01-connection-issue-timing.md b/docs/plans/ws-connectivity-warning/task-01-connection-issue-timing.md
new file mode 100644
index 0000000000..15b2713a5e
--- /dev/null
+++ b/docs/plans/ws-connectivity-warning/task-01-connection-issue-timing.md
@@ -0,0 +1,75 @@
+---
+id: "01-connection-issue-timing"
+title: "Connection issue timing"
+status: done
+wave: 1
+depends_on: []
+plan: "plan.md"
+spec: "../../specs/ui/ws-connectivity-warning.md"
+---
+
+# Task 01: Connection issue timing
+
+## Acceptance
+
+- One transient `ConnectionIssueSeverity` in the canonical frontend store remains `none` before
+  3,000 ms offline, becomes `unstable` at 3,000 ms, and becomes `lost` at 10,000 ms.
+- Switching among non-`connected` raw statuses preserves the original interval; `connected` clears
+  severity immediately and starts the next outage from a fresh grace period.
+- The single `useWebSocket` lifecycle owns and disposes the timers without changing retry,
+  subscription, queue, or raw status/error behavior.
+
+## Verification
+
+```bash
+cd apps && pnpm --filter @kandev/web test -- lib/ws/connection-issue-monitor.test.ts lib/ws/use-websocket.test.tsx lib/state/store.test.ts
+cd apps/web && pnpm run typecheck
+```
+
+## Completion report
+
+- Timing/state behavior: the monitor preserves one outage clock, reports `unstable` at 3,000 ms
+  and `lost` at 10,000 ms, clears a visible warning on reconnect or lifecycle disposal, and cancels
+  pre-threshold timers without emitting a redundant state change.
+- Focused tests: passed — 3 test files and 11 tests.
+- Typecheck: passed — `tsc --noEmit` completed with no errors.
+- Blockers: none.
+- Remaining risk: browser timer throttling can delay a warning, but cannot shorten either grace
+  period or leave a surfaced warning behind after monitor replacement.
+
+## Files likely touched
+
+- `apps/web/lib/types/connection.ts`
+- `apps/web/lib/state/slices/ui/types.ts`
+- `apps/web/lib/state/slices/ui/ui-slice.ts`
+- `apps/web/lib/state/store.ts`
+- `apps/web/lib/ws/connection-issue-monitor.ts`
+- `apps/web/lib/ws/connection-issue-monitor.test.ts`
+- `apps/web/lib/ws/use-websocket.tsx`
+- `apps/web/lib/ws/use-websocket.test.tsx` if direct lifecycle wiring needs a focused boundary test
+- `apps/web/lib/state/store.test.ts`
+
+## Dependencies
+
+None.
+
+## Parallelism
+
+Sequential. Every later surface consumes this shared state contract.
+
+## Inputs
+
+- Spec: `What`, `State machine`, `Failure modes`, and the first five scenarios.
+- Plan: `Frontend > Canonical issue timing`.
+- Existing patterns: `apps/web/lib/ws/use-websocket.tsx`,
+  `apps/web/lib/state/slices/ui/ui-slice.ts`.
+
+## Risks
+
+- React remounts or retry status churn must not create multiple clocks.
+- Cleanup order must prevent an intentional unmount disconnect from starting a new timer.
+
+## Output contract
+
+Report the timing/state behavior, files changed, exact commands and results, blockers/risks, then
+mark this task `done` and update its checkbox in `plan.md`.
diff --git a/docs/plans/ws-connectivity-warning/task-02-desktop-warning-surfaces.md b/docs/plans/ws-connectivity-warning/task-02-desktop-warning-surfaces.md
new file mode 100644
index 0000000000..d49f942d6c
--- /dev/null
+++ b/docs/plans/ws-connectivity-warning/task-02-desktop-warning-surfaces.md
@@ -0,0 +1,62 @@
+---
+id: "02-desktop-warning-surfaces"
+title: "Desktop warning surfaces"
+status: done
+wave: 2
+depends_on: ["01-connection-issue-timing"]
+plan: "plan.md"
+spec: "../../specs/ui/ws-connectivity-warning.md"
+---
+
+# Task 02: Desktop warning surfaces
+
+## Acceptance
+
+- With App status bar enabled, its connection item has no healthy/grace content, shows the exact
+  yellow/red accessible details during an issue, and keeps its stable saved item identity.
+- With App status bar disabled, one focusable indicator appears immediately after the sidebar theme
+  control only during an issue, in both expanded and collapsed sidebar layouts.
+- The two desktop/tablet surfaces are mutually exclusive, expose details on hover and keyboard
+  focus, and clear immediately on recovery.
+
+## Verification
+
+```bash
+cd apps && pnpm --filter @kandev/web test -- components/app-status-bar/connection-status-item.test.tsx components/app-status-bar/app-status-bar.test.tsx components/app-sidebar/app-sidebar-footer.test.tsx
+cd apps/web && pnpm run typecheck
+```
+
+## Files likely touched
+
+- `apps/web/components/app-status-bar/connection-status-item.tsx`
+- `apps/web/components/app-status-bar/connection-status-item.test.tsx`
+- `apps/web/components/app-status-bar/app-status-items.tsx`
+- `apps/web/components/app-status-bar/app-status-bar.test.tsx`
+- `apps/web/components/app-sidebar/app-sidebar-footer.tsx`
+- `apps/web/components/app-sidebar/app-sidebar-footer.test.tsx`
+
+## Dependencies
+
+Task 01.
+
+## Parallelism
+
+Sequential. Shared connection detail/presentation contracts are also consumed by Task 03.
+
+## Inputs
+
+- Spec: desktop/tablet bullets, accessibility requirements, and desktop scenarios.
+- Plan: `Frontend > Desktop and tablet presentation`.
+- Existing patterns: `ConnectionStatusItem`, `FooterIconButton`, and the app-status item
+  `empty:hidden` wrapper.
+
+## Risks
+
+- Removing the healthy visual must not remove `builtin:connection` from saved ordering.
+- A non-action warning must not be implemented as a misleading button; use semantic status/focus
+  behavior with the existing tooltip pattern.
+
+## Output contract
+
+Report surface behavior, files changed, exact commands and results, blockers/risks, then mark this
+task `done` and update its checkbox in `plan.md`.
diff --git a/docs/plans/ws-connectivity-warning/task-03-mobile-warning-surfaces.md b/docs/plans/ws-connectivity-warning/task-03-mobile-warning-surfaces.md
new file mode 100644
index 0000000000..abda33c347
--- /dev/null
+++ b/docs/plans/ws-connectivity-warning/task-03-mobile-warning-surfaces.md
@@ -0,0 +1,73 @@
+---
+id: "03-mobile-warning-surfaces"
+title: "Mobile warning surfaces"
+status: done
+wave: 3
+depends_on: ["01-connection-issue-timing", "02-desktop-warning-surfaces"]
+plan: "plan.md"
+spec: "../../specs/ui/ws-connectivity-warning.md"
+---
+
+# Task 03: Mobile warning surfaces
+
+## Acceptance
+
+- Phone Status access remains ordinary when App status bar is enabled; when it is disabled, it
+  appears only for an active issue and opens a connection-only drawer with no metrics or plugin
+  contributions.
+- Direct Page/Office Status controls, task bottom navigation, and Home/Settings persistent menu
+  triggers plus nested Status rows communicate yellow/red severity without relying on color alone.
+- Existing 44 px touch targets, inset drawer containment, one internal scroll owner, safe-area
+  clearance, dismissal, focus return, and no-horizontal-overflow behavior remain intact.
+
+## Verification
+
+```bash
+cd apps && pnpm --filter @kandev/web test -- components/app-status-bar/app-status-surface-provider.test.tsx components/app-status-bar/app-status-drawer.test.tsx components/kanban/kanban-header-mobile.test.tsx components/settings/settings-layout-client.test.tsx components/task/mobile/session-mobile-bottom-nav.test.tsx
+cd apps/web && pnpm run typecheck
+```
+
+## Files likely touched
+
+- `apps/web/components/app-status-bar/app-status-surface-provider.tsx`
+- `apps/web/components/app-status-bar/app-status-surface-provider.test.tsx`
+- `apps/web/components/app-status-bar/app-status-drawer.tsx`
+- `apps/web/components/app-status-bar/app-status-drawer.test.tsx`
+- `apps/web/components/kanban/kanban-header-mobile.tsx`
+- `apps/web/components/kanban/kanban-header-mobile.test.tsx`
+- `apps/web/components/kanban/mobile-menu-sheet.tsx`
+- `apps/web/components/settings/settings-layout-client.tsx`
+- `apps/web/components/settings/settings-layout-client.test.tsx`
+- `apps/web/components/task/mobile/session-mobile-layout.tsx`
+- `apps/web/components/task/mobile/session-mobile-bottom-nav.tsx`
+- `apps/web/components/task/mobile/session-mobile-bottom-nav.test.tsx`
+
+## Dependencies
+
+Tasks 01 and 02.
+
+## Parallelism
+
+Sequential. It extends the shared details from Task 02 and the provider contract used by all mobile
+callers.
+
+## Inputs
+
+- Spec: `Responsive and mobile contract` and phone scenarios.
+- Plan: `Frontend > Phone presentation` and `Mobile design contract`.
+- Existing exemplar:
+  `apps/web/components/app-status-bar/app-status-drawer.tsx`; existing responsive routing in
+  `AppStatusSurfaceProvider`.
+
+## Risks
+
+- Filtering after item render could still mount disabled metrics/plugin effects; connection-only
+  selection must happen before contributions render.
+- Home and Settings require warning treatment on their persistent menu triggers, not only on nested
+  Status rows.
+
+## Output contract
+
+Report mobile composition, files changed, exact commands and results, rendered verification
+evidence or blocker, blockers/risks, then mark this task `done` and update its checkbox in
+`plan.md`.
diff --git a/docs/plans/ws-connectivity-warning/task-04-connectivity-warning-e2e.md b/docs/plans/ws-connectivity-warning/task-04-connectivity-warning-e2e.md
new file mode 100644
index 0000000000..3aa29b5d68
--- /dev/null
+++ b/docs/plans/ws-connectivity-warning/task-04-connectivity-warning-e2e.md
@@ -0,0 +1,63 @@
+---
+id: "04-connectivity-warning-e2e"
+title: "Connectivity warning E2E"
+status: done
+wave: 4
+depends_on:
+  ["01-connection-issue-timing", "02-desktop-warning-surfaces", "03-mobile-warning-surfaces"]
+plan: "plan.md"
+spec: "../../specs/ui/ws-connectivity-warning.md"
+---
+
+# Task 04: Connectivity warning E2E
+
+## Acceptance
+
+- Production-build desktop E2E proves enabled-bar placement, feature-off sidebar fallback,
+  yellow/red details, mutual exclusion, and immediate recovery.
+- Pixel 5 E2E proves the feature-off warning is visible from persistent route chrome, reaches a
+  44 px Status action, opens a connection-only drawer, returns focus, and introduces no viewport or
+  horizontal-overflow regression.
+- Existing status-bar ordering/geometry E2E is updated only where the now-hidden healthy connection
+  content is material; stable connection identity and saved ordering remain covered.
+
+## Verification
+
+```bash
+cd apps/web && pnpm e2e:run tests/layout/ws-connectivity-warning.spec.ts tests/layout/mobile-ws-connectivity-warning.spec.ts
+```
+
+## Files likely touched
+
+- `apps/web/e2e/tests/layout/ws-connectivity-warning.spec.ts`
+- `apps/web/e2e/tests/layout/mobile-ws-connectivity-warning.spec.ts`
+- `apps/web/e2e/helpers/connection-state.ts` if a typed store-bridge helper keeps tests focused
+- `apps/web/e2e/tests/layout/app-status-bar.spec.ts`
+- Any existing page object that already owns the affected Status trigger, only if reuse is clearer
+  than local selectors
+
+## Dependencies
+
+Tasks 01–03.
+
+## Parallelism
+
+Sequential. The E2E contract spans both rendered implementations.
+
+## Inputs
+
+- Every spec scenario involving a visible surface.
+- Plan: `E2E Tests`.
+- E2E guidance: production managed runner, store bridge for derived-state injection, stable
+  `data-testid` selectors, and `mobile-chrome` routing through the `mobile-*.spec.ts` filename.
+
+## Risks
+
+- Do not add real ten-second sleeps; unit tests own timing and E2E owns integration/presentation.
+- A backend restart used to disable the feature must restore baseline configuration in teardown.
+- Rebuild production assets through `pnpm e2e:run`; do not test a stale Vite bundle.
+
+## Output contract
+
+Report scenarios, screenshots/rendered evidence where captured, exact command and result,
+blockers/risks, then mark this task `done` and update its checkbox in `plan.md`.
diff --git a/docs/plans/ws-connectivity-warning/task-05-public-documentation.md b/docs/plans/ws-connectivity-warning/task-05-public-documentation.md
new file mode 100644
index 0000000000..0008eea0b4
--- /dev/null
+++ b/docs/plans/ws-connectivity-warning/task-05-public-documentation.md
@@ -0,0 +1,65 @@
+---
+id: "05-public-documentation"
+title: "Public documentation"
+status: done
+wave: 4
+depends_on: ["02-desktop-warning-surfaces", "03-mobile-warning-surfaces"]
+plan: "plan.md"
+spec: "../../specs/ui/ws-connectivity-warning.md"
+---
+
+# Task 05: Public documentation
+
+## Acceptance
+
+- Operations docs explain the 3-second yellow and 10-second red states, where the warning appears
+  with App status bar enabled/disabled, and that red means live data may be stale.
+- Configuration docs keep `features.app_status_bar` accurate: it controls the general-purpose
+  surface but not urgent connectivity fallback visibility.
+- Public-doc validation passes with no new page or navigation entry.
+
+## Verification
+
+```bash
+node --test scripts/validate-public-docs.test.mjs
+node scripts/validate-public-docs.mjs
+```
+
+## Completion report
+
+- Public docs: updated the operations and configuration guidance for the 3-second yellow state,
+  10-second red state, stale-data warning, and urgent fallback when the general status bar is off.
+- Validator tests: passed — 58 tests.
+- Published-doc validation: passed — 41 pages validated.
+- Blockers: none.
+- Remaining risk: none beyond keeping the documented thresholds and feature-toggle behavior in sync
+  with future connectivity UI changes.
+
+## Files likely touched
+
+- `docs/public/operations.md`
+- `docs/public/configuration.md`
+
+## Dependencies
+
+Tasks 02 and 03.
+
+## Parallelism
+
+Sequential so terminology matches the landed UI.
+
+## Inputs
+
+- Spec: `What`, `Failure modes`, and `Out of scope`.
+- Plan: `Public documentation`.
+- Existing Feature toggles and troubleshooting sections in `docs/public/operations.md`.
+
+## Risks
+
+- Do not imply that `features.app_status_bar=false` mounts plugins or metrics during an outage.
+- Keep the warning distinct from `/health`, System Status, executor health, and integration health.
+
+## Output contract
+
+Report public docs changed, exact validation results, blockers/risks, then mark this task `done` and
+update its checkbox in `plan.md`.
diff --git a/docs/public/configuration.md b/docs/public/configuration.md
index 179e21395a..b8edb36b14 100644
--- a/docs/public/configuration.md
+++ b/docs/public/configuration.md
@@ -116,7 +116,10 @@ The launcher starts `agentctl`, performs a one-time nonce handshake, and supplie
 | `office.jwtSigningKey` | `KANDEV_OFFICE_JWTSIGNINGKEY` | random per start | HMAC key for Office agent-runtime JWTs. Set a stable secret when Office tasks must survive restarts. |
 | `voice.openAIApiKey` | `KANDEV_VOICE_OPENAI_API_KEY` | empty | Server-side transcription fallback when browser speech recognition is unavailable. Empty disables the fallback and its endpoint returns unavailable. |
 | `features.office` | `KANDEV_FEATURES_OFFICE` | `false` in production | Experimental Office UI, routes, services, and automation. |
-| `features.app_status_bar` | `KANDEV_FEATURES_APP_STATUS_BAR` | `false` in production | Opt-in global connection/host-metrics/plugin surface: bottom bar on tablet/desktop and Status drawer on phones. |
+| `features.plugins` | `KANDEV_FEATURES_PLUGINS` | `false` in production | Extensible plugin system: install/manage plugins, spawn plugin backends, and load native UI bundles. Loaded plugin code runs with backend privileges. |
+| `features.app_status_bar` | `KANDEV_FEATURES_APP_STATUS_BAR` | `false` in production | Opt-in global connection/host-metrics/plugin surface: bottom bar on tablet/desktop and Status drawer on phones. Disabling it does not suppress active WebSocket connectivity warnings. |
+| `features.plugins` | `KANDEV_FEATURES_PLUGINS` | `false` in production | Extensible plugin system: install/manage plugins, spawn plugin backends, and load native UI bundles. Loaded plugin code runs with backend privileges. |
+| `features.app_status_bar` | `KANDEV_FEATURES_APP_STATUS_BAR` | `false` in production | Opt-in global connection/host-metrics/plugin surface: bottom bar on tablet/desktop and Status drawer on phones. Disabling it does not suppress active WebSocket connectivity warnings. |
 | `features.claude_background_prompt_handoff` | `KANDEV_FEATURES_CLAUDE_BACKGROUND_PROMPT_HANDOFF` | `false` | High-risk experiment that lets Claude Code accept a new prompt after its foreground yields while adapter-attested background work remains active. Other providers keep the coarse busy gate. |
 
 Do not infer security from `auth.jwtSecret`: setting it currently does not turn the local server into an authenticated public service. Office's JWT key has a narrower, active purpose. Store both active secrets and third-party API keys in your deployment secret manager; never commit them in `config.yaml`.
@@ -292,7 +295,10 @@ Copying this entire file is unnecessary and can freeze old defaults in a deploym
 | Key | Environment lock | Production default | Effect |
 |---|---|---|---|
 | `features.office` | `KANDEV_FEATURES_OFFICE` | off | Experimental autonomous-agent Office surfaces and automation. |
-| `features.appStatusBar` | `KANDEV_FEATURES_APP_STATUS_BAR` | off | Global status bar on tablet/desktop and Status drawer entry on phones. Enabling changes visibility only. |
+| `features.plugins` | `KANDEV_FEATURES_PLUGINS` | off | Extensible plugin system: install/manage plugins and load their backends and native UI bundles. |
+| `features.appStatusBar` | `KANDEV_FEATURES_APP_STATUS_BAR` | off | Global status bar on tablet/desktop and Status drawer entry on phones. Enabling changes visibility only; urgent WebSocket connectivity warnings remain visible when it is off. |
+| `features.plugins` | `KANDEV_FEATURES_PLUGINS` | off | Extensible plugin system: install/manage plugins and load their backends and native UI bundles. |
+| `features.appStatusBar` | `KANDEV_FEATURES_APP_STATUS_BAR` | off | Global status bar on tablet/desktop and Status drawer entry on phones. Enabling changes visibility only; urgent WebSocket connectivity warnings remain visible when it is off. |
 | `features.claudeBackgroundPromptHandoff` | `KANDEV_FEATURES_CLAUDE_BACKGROUND_PROMPT_HANDOFF` | off | High-risk Claude Code experiment that exposes recognized background-only activity and admits a successor prompt. |
 | `debug.devMode` | `KANDEV_DEBUG_DEV_MODE` (also locked by explicit legacy/debug-message vars) | off | High-risk diagnostic endpoints and ACP frame logging. |
 
diff --git a/docs/public/operations.md b/docs/public/operations.md
index e5631008ed..b9c4f5cd15 100644
--- a/docs/public/operations.md
+++ b/docs/public/operations.md
@@ -274,12 +274,16 @@ Collection starts only while at least one connected client displays metrics in t
 
 These metrics are lightweight UI observability. Set alerts, retention, CPU/memory limits, and disk quotas in the host, container platform, or external monitoring stack.
 
+## WebSocket connectivity warnings
+
+Kandev warns when its live WebSocket connection has not recovered for three seconds: yellow means the connection is unstable and reconnecting; after ten seconds the warning turns red, meaning live updates may be stale. The warning clears as soon as the connection recovers. With **App status bar** enabled, it appears in the bottom bar on desktop/tablet and through the existing Status controls on phones. When that feature is disabled, an active warning still appears beside the sidebar theme control on desktop/tablet and opens a connection-only Status drawer on phones.
+
 ## Feature toggles
 
 **Settings > System > Feature Toggles** currently exposes:
 
 - **Office mode** — experimental, medium risk, and off in the production profile by default.
-- **App status bar** — stable, low risk, and off in the production profile by default. Enabling it adds the desktop/tablet bar and phone Status entry after restart; disabling it again does not stop connections, metrics collection requested by other clients, or plugins.
+- **App status bar** — stable, low risk, and off in the production profile by default. Enabling it adds the desktop/tablet bar and phone Status entry after restart; disabling it again does not stop connections, metrics collection requested by other clients, or plugins. Urgent WebSocket connectivity warnings still remain visible while the feature is off.
 - **Claude background prompt handoff** — experimental, high risk, and off in every profile by default. Enabling it lets Claude Code accept another prompt after its foreground yields while recognized async subagent, `run_in_background` shell, or Monitor work remains active. ACP lifecycle gaps can misclassify activity or overlap prompts; use it only for controlled testing.
 - **Debug mode** — high risk; enables diagnostic endpoints and agent-message logging that can contain sensitive content.
 
diff --git a/docs/specs/INDEX.md b/docs/specs/INDEX.md
index c538198f7f..2adbfed5c0 100644
--- a/docs/specs/INDEX.md
+++ b/docs/specs/INDEX.md
@@ -133,7 +133,7 @@ Subscription quota tracking and per-agent cheap-model profile routing.
 | [mermaid-rendering](ui/mermaid-rendering.md) | shipped |
 | [settings-manual-save](ui/settings-manual-save.md) | shipped |
 | [transcript-navigation-settings](ui/transcript-navigation-settings.md) | shipped |
-| [app-status-bar](ui/app-status-bar.md) | draft |
+| [app-status-bar](ui/app-status-bar.md) | approved |
 | [mobile-task-navigation](ui/mobile-task-navigation.md) | shipped |
 | [adaptive-kanban](ui/adaptive-kanban.md) | shipped |
 | [task-layout-profiles](ui/task-layout-profiles.md) | draft |
@@ -145,6 +145,7 @@ Subscription quota tracking and per-agent cheap-model profile routing.
 | [task-workspace-content-search](ui/task-workspace-content-search.md) | shipped |
 | [embedded-vscode-executor-availability](ui/embedded-vscode-executor-availability.md) | approved |
 | [embedded-vscode-windows-availability](ui/embedded-vscode-windows-availability.md) | archived; superseded by embedded-vscode-executor-availability |
+| [ws-connectivity-warning](ui/ws-connectivity-warning.md) | approved |
 
 ## system-page/ — operational diagnostics & maintenance UI
 
diff --git a/docs/specs/feature-toggles/spec.md b/docs/specs/feature-toggles/spec.md
index a4b6236621..0a262579ba 100644
--- a/docs/specs/feature-toggles/spec.md
+++ b/docs/specs/feature-toggles/spec.md
@@ -21,7 +21,7 @@ restart required for startup-gated features such as Office mode and Debug mode.
 - The page shows user-facing runtime toggles, not every profile/env knob.
 - V1 exposes three user-facing toggles:
   - **Office mode** — enables the autonomous-agent Office surface.
-  - **App status bar** — shows the global desktop/tablet status bar and the phone Status drawer entry. It is stable and off by default in production; enabling it changes visibility only.
+  - **App status bar** — shows the general-purpose desktop/tablet status bar and phone Status drawer entry. It is stable and off by default in production; enabling it changes visibility only. Disabling it does not suppress the problem-only [WebSocket connectivity warning](../ui/ws-connectivity-warning.md).
   - **Debug mode** — enables local diagnostic/debug behavior, including agent
     message debug logs.
 - Office mode is marked **Experimental** and includes a concise description of
@@ -262,7 +262,8 @@ especially Debug mode, to admins.
   enabled after restart.
 - **GIVEN** App status bar is using its default, **WHEN** the user opens Feature
   Toggles, **THEN** it appears off and explains that enabling it adds both the
-  desktop/tablet bar and phone Status entry after restart.
+  desktop/tablet bar and ordinary phone Status entry after restart, while urgent
+  WebSocket connectivity warnings remain available when it is off.
 - **GIVEN** a toggle override exists, **WHEN** the user clicks `Reset to default`,
   **THEN** the override is removed and the page shows restart-required state if
   the effective runtime value differs from the restored default.
diff --git a/docs/specs/office/live-updates.md b/docs/specs/office/live-updates.md
index 4017ed96b7..b18277a51b 100644
--- a/docs/specs/office/live-updates.md
+++ b/docs/specs/office/live-updates.md
@@ -297,7 +297,7 @@ The kandev backend runs in a single-user model (`store.DefaultUserID = "default-
 | Dependency / scenario | Observable behavior |
 |---|---|
 | **WS network drop** | Socket transitions `open → closed → reconnecting`. Pending request promises stay armed until `cleanupPendingRequests()` rejects them at the reconnect cap. Subscription maps are retained. On `open` the client flushes the buffered outbound queue, then re-issues every `subscribe` / `focus` / `user.subscribe` / `run.subscribe` frame from `resubscribe()`. **No replay** of missed notifications — surfaces refetch on next event or stay stale until then. |
-| **Reconnect cap exceeded** | After `maxAttempts` (default 10) consecutive failures with exponential backoff capped at 30s, status moves to `error`, pending requests are rejected with `WebSocket connection closed`, and no further automatic reconnects occur. The topbar surfaces a connection indicator; the user must reload to recover. |
+| **Reconnect cap exceeded** | After `maxAttempts` (default 10) consecutive failures with exponential backoff capped at 30s, status moves to `error`, pending requests are rejected with `WebSocket connection closed`, and no further automatic reconnects occur. The [WebSocket connectivity warning](../ui/ws-connectivity-warning.md) remains red; the user must reload to recover. |
 | **Server send buffer full** | `client.send` is a 256-deep buffer. When full, `sendBytes` logs `Client send buffer full, dropping message` and the message is dropped for that client only. Other clients still receive it. No retry, no replay; consumer must reconcile on next event. |
 | **Frontend handler throws** | The hub's frontend WS client invokes handlers in a `forEach`; an unhandled throw skips remaining handlers for that event but does not tear down the socket. |
 | **Event bus publish during shutdown** | `MemoryEventBus.Publish` returns `event bus is closed` after `Close()`. The publisher (orchestrator / office service) logs and continues; the broadcast is dropped. WS clients see no notification for that event. |
diff --git a/docs/specs/ui/app-status-bar.md b/docs/specs/ui/app-status-bar.md
index 50faabe4d1..9f8d392c32 100644
--- a/docs/specs/ui/app-status-bar.md
+++ b/docs/specs/ui/app-status-bar.md
@@ -1,5 +1,5 @@
 ---
-status: shipped
+status: approved
 created: 2026-07-21
 owner: kandev
 ---
@@ -14,7 +14,7 @@ Kandev has useful app-wide state, but it is scattered through route headers. A s
 
 - Desktop and tablet render one persistent **24 px**, in-flow bottom status bar across the app shell, including sidebar and route content. Desktop uses `full` density; tablet uses `compact` density.
 - Phone renders no persistent second bottom bar. Native route controls open one global **Status** inset bottom drawer, so it does not collide with task bottom navigation. The drawer mirrors the saved bar order vertically (saved left sequence, then saved right sequence), has a fixed header, one internal scroll body, safe-area clearance, 44 px action rows, and returns focus to its trigger.
-- The production-default-off `features.appStatusBar` runtime toggle controls both presentations. When disabled, neither the desktop/tablet bar nor phone Status entry points render. Enabling or disabling it requires a Kandev restart. It changes visibility only; it does not stop connections, metrics collection requested by other clients, or plugin execution.
+- The production-default-off `features.appStatusBar` runtime toggle controls both general-purpose presentations. When disabled, neither the desktop/tablet bar nor ordinary phone Status entry points render. An active [WebSocket connectivity warning](ws-connectivity-warning.md) is the sole exception: it uses problem-only fallback chrome and a connection-only phone drawer without mounting the bar, metrics, or plugin contributions. Enabling or disabling the toggle requires a Kandev restart. It changes visibility only; it does not stop connections, metrics collection requested by other clients, or plugin execution.
 - Built-ins are limited to Kandev-owned state:
   - Canonical connection state and error from `state.connection.status` / `state.connection.error`, with a restrained semantic dot, the connected detail **Connected to Kandev**, accessible text, and readable failure detail.
   - Existing Kandev-host CPU/memory metrics, preserving enabled-metric order, formatting, thresholds, limits, and tooltips. The built-in surface does not render active-task, active-session, or executor metrics.
@@ -31,7 +31,7 @@ Kandev has useful app-wide state, but it is scattered through route headers. A s
 
 - `AppShell` owns viewport geometry: an `h-dvh` column with a `min-h-0 flex-1` sidebar/route row, followed by the status surface. Shell-owned route roots use parent height and explicit local overflow rather than adding a second viewport height.
 - `--app-status-bar-height` is `1.5rem` on tablet/desktop and `0` on phone. It offsets only audited desktop `position: fixed` overlays; it is not global content padding. Phone bottom navigation and phone drop targets retain `bottom: 0`.
-- Exactly one presentation mounts at once: bar on tablet/desktop, drawer contents only while the phone drawer is open. This prevents duplicate plugin effects and metrics subscriptions at breakpoints. Disabling `features.appStatusBar` mounts neither.
+- Exactly one general-purpose presentation mounts at once: bar on tablet/desktop, drawer contents only while the phone drawer is open. This prevents duplicate plugin effects and metrics subscriptions at breakpoints. Disabling `features.appStatusBar` mounts neither general-purpose presentation; a connection-only warning drawer may mount under the exception above.
 - Standard mobile headers, Home utility menu, task bottom navigation, Settings mobile menu, and Office topbar expose Status. A full-bleed plugin route (`topbar: false`) owns its chrome and must mount `AppStatusDrawerTrigger` if it wants status access.
 
 ## Plugin slots
@@ -84,7 +84,7 @@ The only public API addition is `registerComponent("app-status-bar-left" | "app-
 
 - Before the first metrics snapshot arrives, the metrics item remains hidden while its normal WebSocket subscription stays active; loading is not presented as an availability failure and does not create a fallback fetch or provider.
 - A received snapshot without the Kandev host source renders the recognizable unavailable state. Unavailable metric samples keep their existing per-metric degraded presentation and inspectable error detail.
-- Connection errors remain inspectable through accessible detail; reconnecting is not misrepresented as connected.
+- Connection errors remain inspectable through accessible detail; reconnecting is not misrepresented as connected. The bottom connection item follows the problem-only timing and severity contract in [WebSocket connectivity warning](ws-connectivity-warning.md).
 - A failed plugin contribution is contained by its own boundary; remaining contributions and first-party state remain usable.
 - If Status drawer closes during a metrics update or breakpoint changes, the inactive presentation unmounts and releases only its own ref-counted subscription.
 - Invalid, duplicate, or temporarily unavailable saved item identities never mount duplicate UI. The host normalizes active items once and retains unavailable identities for later plugin re-enable.
@@ -112,7 +112,8 @@ Visual interaction is a clean Kandev adaptation of Orca's public status-bar idea
 - **GIVEN** the simplified metrics preference, **WHEN** a phone user opens Status, **THEN** the metrics row shows the same icon-and-value presentation without a host marker or percentage meter bar.
 - **GIVEN** metrics preference disabled, or a phone Status drawer closed, **WHEN** the app runs, **THEN** no system-metrics WebSocket subscription is held by this feature.
 - **GIVEN** the feature is enabled for a phone user, **WHEN** they choose Status from a native entry point, **THEN** the drawer shows the same built-ins and plugin regions; dismissing it restores focus and leaves no persistent status bar.
-- **GIVEN** an administrator disables **App status bar** in Feature Toggles and restarts Kandev, **WHEN** a route renders on any breakpoint, **THEN** the bar/drawer and native Status triggers are absent while the rest of the shell remains available.
+- **GIVEN** an administrator disables **App status bar** in Feature Toggles and restarts Kandev, **WHEN** a route renders without a WebSocket warning, **THEN** the bar/drawer and native Status triggers are absent while the rest of the shell remains available.
+- **GIVEN** App status bar is disabled, **WHEN** a WebSocket warning becomes active, **THEN** only the problem-only fallback defined by [WebSocket connectivity warning](ws-connectivity-warning.md) appears; metrics and plugin contributions remain unmounted.
 - **GIVEN** a plugin registered for either status slot, **WHEN** it enables or disables, **THEN** its contribution appears or disappears without reload in the active presentation. A failed contribution does not suppress a following healthy one after registrations change.
 - **GIVEN** a desktop/tablet bar, **WHEN** the user holds Cmd/Ctrl and mouse-drags a built-in or plugin contribution across another item or the spacer, **THEN** the item moves horizontally, normal click activation is suppressed only after a drag begins, and the new side/order survives reload and backend restart.
 - **GIVEN** a modified mouse press begins on status text, **WHEN** the pointer crosses the drag threshold, **THEN** the item enters its dragging state without selecting text in the bar.
diff --git a/docs/specs/ui/ws-connectivity-warning.md b/docs/specs/ui/ws-connectivity-warning.md
new file mode 100644
index 0000000000..ef4dc021b5
--- /dev/null
+++ b/docs/specs/ui/ws-connectivity-warning.md
@@ -0,0 +1,117 @@
+---
+status: approved
+created: 2026-07-30
+owner: kandev
+---
+
+# WebSocket Connectivity Warning
+
+## Why
+
+Kandev can look current while its live WebSocket updates are delayed or unavailable. Users need a
+quiet but unavoidable indication that task, session, and workspace state may be stale, without
+showing permanent healthy-state chrome or flashing for harmless reconnects.
+
+## What
+
+- Kandev derives one transient connectivity severity from the continuous time since its canonical
+  application WebSocket last entered `connected`:
+  - **Healthy/grace:** no warning before 3 seconds offline.
+  - **Unstable:** yellow from 3 seconds offline until 10 seconds offline.
+  - **Lost:** red from 10 seconds offline until the connection recovers.
+- Transitions among `connecting`, `reconnecting`, `disconnected`, and `error` belong to the same
+  continuous offline interval. They do not restart either threshold.
+- Any `connected` transition clears the warning immediately. A later disconnect starts a new grace
+  interval.
+- The yellow detail reads **Connection unstable. Reconnecting to Kandev.**
+- The red detail reads **Connection lost for at least 10 seconds. Live updates may be stale.**
+- Color is never the only signal. The active surface exposes the matching detail as an accessible
+  status name and through hover/focus on fine-pointer layouts or tap on phone.
+- Desktop and tablet show exactly one warning:
+  - When **App status bar** is enabled, its built-in connection item is problem-only: absent while
+    healthy or in grace, yellow while unstable, and red while lost.
+  - When **App status bar** is disabled, a problem-only connection indicator appears in the persistent
+    app-sidebar footer beside the theme control. The fallback is absent while healthy or in grace.
+- Phone uses its existing native Status paths rather than adding a persistent bar or overlay:
+  - Existing Status entry points receive yellow/red warning treatment.
+  - Route chrome that leads to a nested Status action, such as the Home or Settings menu, carries
+    the same warning treatment so the issue is visible before opening the menu.
+  - When **App status bar** is disabled, these paths appear only during an active warning and open a
+    connection-only Status drawer. Plugin contributions and metrics stay disabled.
+- The warning does not alter reconnect attempts, WebSocket subscriptions, queued requests, or
+  last-known application data.
+
+## State machine
+
+| State | Entry | Visible result | Exit |
+|---|---|---|---|
+| `healthy` | WebSocket enters `connected` | No warning | First non-`connected` status |
+| `grace` | A continuous offline interval starts | No warning | `connected`, or 3 seconds elapse |
+| `unstable` | The same interval reaches 3 seconds | Yellow warning | `connected`, or 10 seconds elapse |
+| `lost` | The same interval reaches 10 seconds | Red warning | `connected` |
+
+The state is client-local and transient. A page reload starts a new connection attempt and grace
+interval; no outage timestamp or warning history persists.
+
+## Failure modes
+
+- If the reconnect client exhausts its attempts, the warning remains red until a later
+  `connected` transition or page reload. It does not claim that retries are still running.
+- If the optional App status surface is disabled, an active warning bypasses only its visibility
+  gate. It does not mount metrics, plugin status contributions, or a desktop/tablet status bar.
+- If a responsive presentation changes during an outage, the current severity moves to the new
+  canonical surface without resetting its offline interval or rendering duplicate warnings.
+- If the warning timer owner unmounts, it cancels pending thresholds and does not update stale
+  application state.
+
+## Responsive and mobile contract
+
+- Desktop outcome: one problem-only warning in the enabled bottom status bar or, when that bar is
+  disabled, beside the sidebar theme control.
+- Phone entry points reuse the shipped Page/Office top-bar Status button, task bottom-nav Status
+  action, and Home/Settings menu paths. The persistent route control signals severity before the
+  nested Status action is opened.
+- The existing App Status drawer is the nearest shipped mobile exemplar. It contributes the inset
+  bottom surface, fixed summary, one safe-area-aware internal scroll owner, 44 px rows, dismissal,
+  and focus return.
+- A short connection explanation belongs in that temporary drawer; it does not justify a new route
+  or full-height surface.
+- Connection timing and severity are shared across breakpoints. Mobile-specific code only chooses
+  presentation and touch entry points.
+
+## Scenarios
+
+- **GIVEN** a connected client, **WHEN** its WebSocket is offline for less than 3 seconds and
+  reconnects, **THEN** no connectivity warning appears.
+- **GIVEN** a connected client, **WHEN** its WebSocket remains offline for 3 seconds, **THEN** one
+  yellow warning appears with **Connection unstable. Reconnecting to Kandev.**
+- **GIVEN** the same outage, **WHEN** it reaches 10 seconds, **THEN** the existing warning becomes
+  red with **Connection lost for at least 10 seconds. Live updates may be stale.**
+- **GIVEN** an unstable or lost warning, **WHEN** any reconnect attempt enters `connected`, **THEN**
+  the warning disappears immediately and a later outage receives a fresh grace interval.
+- **GIVEN** reconnect attempts cycle through non-connected raw statuses, **WHEN** the continuous
+  outage crosses a threshold, **THEN** the threshold is measured from the original disconnect.
+- **GIVEN** App status bar enabled on desktop or tablet, **WHEN** connection severity changes,
+  **THEN** only its built-in connection item reflects the warning and no sidebar fallback appears.
+- **GIVEN** App status bar disabled on desktop or tablet, **WHEN** connection severity becomes
+  unstable or lost, **THEN** one warning indicator appears beside the sidebar theme control and exposes
+  the matching detail on hover and focus.
+- **GIVEN** App status bar disabled on phone, **WHEN** connection severity becomes unstable or
+  lost, **THEN** persistent route chrome signals the issue and its Status path opens a
+  connection-only, touch-sized drawer without metrics or plugin contributions.
+- **GIVEN** a phone warning, **WHEN** the user opens and dismisses Status, **THEN** the connection
+  detail is readable, the drawer stays within the viewport, and focus returns to the trigger.
+- **GIVEN** an active warning, **WHEN** the viewport crosses between phone and wider layouts,
+  **THEN** the severity remains unchanged and exactly one canonical warning surface is visible.
+
+## Out of scope
+
+- Latency, packet-loss, heartbeat-quality, or REST-health sampling.
+- Changing reconnect delays, retry limits, queueing, resubscription, or missed-event recovery.
+- Manual reconnect actions, recovery toasts, healthy-state success messages, outage history, or
+  persisted incident timestamps.
+- A new phone bar, toast, route, full-screen alert, or desktop top-bar injection.
+
+## Implementation plan
+
+[WebSocket connectivity warning plan](../../plans/ws-connectivity-warning/plan.md)