Fix notifications opening the wrong workspace (#2331)

* fix(app): open notifications on the right host

Agent notifications previously omitted workspace ownership, so a cold target host was treated as missing and fell back to its empty home route. Carry the authoritative workspace and keep older notifications on a target-host resolver until lookup is conclusive.

* fix(app): separate notification and agent URL routing

Notifications use their authoritative workspace target directly. Stable agent URLs remain server-and-agent targets whose workspace is resolved by the agent route.

* fix(protocol): preserve notification workspace targets

Both attention message variants retain workspaceId through outbound validation so notification clicks receive the authoritative route target.

* test(app): use workspace-scoped notification target

* test(server): give notification agents workspace targets

* test(app): target notification workspace in navigation e2e

docs/expo-router.md

@@ -73,6 +73,20 @@ only use local param fallback during cold mount (`/` or empty pathname), or a
 hidden workspace can overwrite the remembered workspace before Settings or
 History returns.
 
+## Agent Targets
+
+Notifications and agent URLs enter the router with different authoritative
+targets.
+
+- Notifications carry `serverId`, `workspaceId`, and `agentId`. Route them
+  directly to the workspace with the agent open intent.
+- Agent URLs carry only `serverId` and `agentId`. Route them through
+  `/h/[serverId]/agent/[agentId]`; that route waits for the named host, resolves
+  the agent's workspace from the host, and then opens the agent there.
+
+Both paths converge on `navigateToAgent()`. Do not make notification routing
+guess a workspace, and do not add a workspace to the stable agent URL format.
+
 ## Params
 
 Required dynamic params belong to the matched route.

packages/app/e2e/workspace-navigation-regression.spec.ts

@@ -1,4 +1,8 @@
-import { buildHostAgentDetailRoute, buildHostWorkspaceRoute } from "@/utils/host-routes";
+import {
+  buildHostAgentDetailRoute,
+  buildHostWorkspaceOpenRoute,
+  buildHostWorkspaceRoute,
+} from "@/utils/host-routes";
 import { expect, test, type Page } from "./fixtures";
 import { gotoAppShell, openSettings } from "./helpers/app";
 import {
@@ -34,6 +38,7 @@ import { getServerId } from "./helpers/server-id";
 import { injectDesktopBridge, waitForDesktopDaemonStartRequest } from "./helpers/desktop-updates";
 import { expectAppRoute } from "./helpers/route-assertions";
 import { installDaemonWebSocketGate } from "./helpers/daemon-websocket-gate";
+import { addOfflineHostAndReload } from "./helpers/hosts";
 
 const LOADING_WORKSPACE_TEXT_PATTERN = /Loading workspace/i;
 type StartupPresentation = "splash" | "app";
@@ -158,6 +163,43 @@ async function expectWorkspaceLocation(
 test.describe("Workspace navigation regression", () => {
   test.describe.configure({ timeout: 240_000 });
 
+  test("opens a notification's workspace on a different offline host", async ({ page }) => {
+    const target = {
+      serverId: "notification-offline-host",
+      workspaceId: "notification-workspace",
+      agentId: "notification-agent",
+    };
+
+    await gotoAppShell(page);
+    await addOfflineHostAndReload(page, {
+      serverId: target.serverId,
+      label: "Notification Host",
+    });
+    await expect(
+      page.getByTestId("sidebar-settings").filter({ visible: true }).first(),
+    ).toBeVisible({
+      timeout: 30_000,
+    });
+
+    await page.evaluate((data) => {
+      globalThis.dispatchEvent(
+        new CustomEvent("paseo:web-notification-click", {
+          detail: { data: { ...data, reason: "finished" } },
+          cancelable: true,
+        }),
+      );
+    }, target);
+
+    await expectAppRoute(
+      page,
+      buildHostWorkspaceOpenRoute(target.serverId, target.workspaceId, `agent:${target.agentId}`),
+      { timeout: 30_000 },
+    );
+    await expect(page.getByText("Connecting", { exact: true })).toBeVisible();
+    await expect(page.getByText("Notification Host", { exact: true })).toBeVisible();
+    await expect(page.getByText("Add a project", { exact: true })).toHaveCount(0);
+  });
+
   test("keeps one replacement draft after returning from settings and closing the last tab", async ({
     page,
     withWorkspace,
@@ -420,12 +462,13 @@ test.describe("Workspace navigation regression", () => {
       await expectWorkspaceDeckEntryCount(page, 2);
 
       await page.evaluate(
-        ({ agentId, serverId: targetServerId }) => {
+        ({ agentId, serverId: targetServerId, workspaceId }) => {
           globalThis.dispatchEvent(
             new CustomEvent("paseo:web-notification-click", {
               detail: {
                 data: {
                   serverId: targetServerId,
+                  workspaceId,
                   agentId,
                   reason: "finished",
                 },
@@ -434,7 +477,7 @@ test.describe("Workspace navigation regression", () => {
             }),
           );
         },
-        { agentId: secondAgent.id, serverId },
+        { agentId: secondAgent.id, serverId, workspaceId: secondWorkspace.workspaceId },
       );
       await waitForWorkspaceTabsVisible(page);
       await expect(page).toHaveURL(buildHostWorkspaceRoute(serverId, secondWorkspace.workspaceId), {

packages/app/src/app/_layout.tsx

@@ -147,9 +147,10 @@ function PushNotificationRouter() {
   const openNotification = useStableEvent((data: Record<string, unknown> | undefined) => {
     const target = resolveNotificationTarget(data);
     const serverId = target.serverId;
+    const workspaceId = target.workspaceId;
     const agentId = target.agentId;
-    if (serverId && agentId) {
+    if (serverId && workspaceId && agentId) {
-      navigateToAgent({ serverId, agentId, pin: true });
+      navigateToAgent({ serverId, workspaceId, agentId, pin: true });
       return;
     }
 

packages/app/src/app/h/[serverId]/agent/[agentId].tsx

@@ -1,10 +1,13 @@
-import { useEffect, useRef } from "react";
+import { useCallback, useEffect, useMemo, useRef } from "react";
 import { useLocalSearchParams, useRouter, type Href } from "expo-router";
 import { HostRouteBootstrapBoundary } from "@/components/host-route-bootstrap-boundary";
+import { useFetchQuery } from "@/data/query";
+import { resolveAgentRoute, type AgentRouteLookup } from "@/navigation/agent-route-resolution";
+import { AgentRouteResolutionView } from "@/navigation/agent-route-resolution-view";
 import { useSessionStore } from "@/stores/session-store";
-import { useHostRuntimeClient, useHostRuntimeIsConnected } from "@/runtime/host-runtime";
+import { getHostRuntimeStore, useHostRuntimeSnapshot, useHosts } from "@/runtime/host-runtime";
-import { buildHostRootRoute } from "@/utils/host-routes";
+import { buildHostRootRoute, buildSettingsHostRoute } from "@/utils/host-routes";
-import { normalizeWorkspaceOpaqueId } from "@/utils/workspace-identity";
+import { toErrorMessage } from "@/utils/error-messages";
 import { navigateToAgent } from "@/utils/navigate-to-agent";
 
 export default function HostAgentReadyRoute() {
@@ -21,97 +24,128 @@ function HostAgentReadyRouteContent() {
     serverId?: string;
     agentId?: string;
   }>();
-  const redirectedRef = useRef(false);
+  const handledNavigationRef = useRef<string | null>(null);
   const serverId = typeof params.serverId === "string" ? params.serverId : "";
   const agentId = typeof params.agentId === "string" ? params.agentId : "";
-  const client = useHostRuntimeClient(serverId);
+  const hosts = useHosts();
-  const isConnected = useHostRuntimeIsConnected(serverId);
+  const runtimeSnapshot = useHostRuntimeSnapshot(serverId);
+  const client = runtimeSnapshot?.client ?? null;
+  const connectionStatus = runtimeSnapshot?.connectionStatus ?? "connecting";
+  const hostName = hosts.find((host) => host.serverId === serverId)?.label ?? serverId;
   const agentWorkspaceId = useSessionStore((state) => {
     if (!serverId || !agentId) {
       return null;
     }
     return state.sessions[serverId]?.agents?.get(agentId)?.workspaceId ?? null;
   });
-  const hasHydratedWorkspaces = useSessionStore((state) =>
+  const shouldLookupAgent = Boolean(
-    serverId ? (state.sessions[serverId]?.hasHydratedWorkspaces ?? false) : false,
+    serverId && agentId && client && connectionStatus === "online" && !agentWorkspaceId,
   );
-  const resolvedWorkspaceId = normalizeWorkspaceOpaqueId(agentWorkspaceId);
+  const lookupQuery = useFetchQuery({
+    queryKey: ["agentRouteResolution", serverId, agentId, runtimeSnapshot?.clientGeneration ?? 0],
+    queryFn: async () => {
+      if (!client) {
+        throw new Error("Target host client is unavailable");
+      }
+      const result = await client.fetchAgent({ agentId });
+      return result?.agent?.workspaceId ?? null;
+    },
+    enabled: shouldLookupAgent,
+    retry: false,
+    dataShape: "value",
+    staleTimeMs: 0,
+  });
+  const lookup = useMemo<AgentRouteLookup>(() => {
+    if (!shouldLookupAgent) {
+      return { kind: "idle" };
+    }
+    if (lookupQuery.isFetching) {
+      return { kind: "fetching" };
+    }
+    if (lookupQuery.isError) {
+      return { kind: "failed", error: toErrorMessage(lookupQuery.error) };
+    }
+    if (lookupQuery.isSuccess) {
+      return { kind: "found", workspaceId: lookupQuery.data };
+    }
+    return { kind: "fetching" };
+  }, [
+    lookupQuery.data,
+    lookupQuery.error,
+    lookupQuery.isError,
+    lookupQuery.isFetching,
+    lookupQuery.isSuccess,
+    shouldLookupAgent,
+  ]);
+  const resolution = resolveAgentRoute({
+    serverId,
+    agentId,
+    cachedWorkspaceId: agentWorkspaceId,
+    connectionStatus,
+    lookup,
+  });
 
   useEffect(() => {
-    if (redirectedRef.current) {
+    let navigationKey: string | null = null;
-      return;
+    if (resolution.kind === "invalid") {
+      navigationKey = "invalid";
+    } else if (resolution.kind === "resolved") {
+      navigationKey = `workspace:${resolution.workspaceId}`;
+    } else if (resolution.kind === "notFound") {
+      navigationKey = "not-found";
     }
-    if (!serverId || !agentId) {
+    if (!navigationKey || handledNavigationRef.current === navigationKey) {
-      redirectedRef.current = true;
-      router.replace("/" as Href);
       return;
     }
+    handledNavigationRef.current = navigationKey;
 
-    if (resolvedWorkspaceId) {
+    if (resolution.kind === "resolved") {
-      redirectedRef.current = true;
+      navigateToAgent({ serverId, agentId, workspaceId: resolution.workspaceId });
-      navigateToAgent({
+      return;
-        serverId,
-        agentId,
-      });
     }
-  }, [agentId, resolvedWorkspaceId, router, serverId]);
+    router.replace(resolution.kind === "invalid" ? ("/" as Href) : buildHostRootRoute(serverId));
+  }, [agentId, resolution, router, serverId]);
 
-  useEffect(() => {
+  const handleRetry = useCallback(() => {
-    if (redirectedRef.current) {
+    if (resolution.kind === "lookupError") {
+      void lookupQuery.refetch();
       return;
     }
-    if (!serverId || !agentId) {
+    if (serverId) {
+      void getHostRuntimeStore().runProbeCycleNow(serverId);
+    }
+  }, [lookupQuery, resolution.kind, serverId]);
+  const handleManageHost = useCallback(() => {
+    if (serverId) {
+      router.push(buildSettingsHostRoute(serverId));
+    }
+  }, [router, serverId]);
+  const handleBack = useCallback(() => {
+    if (router.canGoBack()) {
+      router.back();
       return;
     }
-    if (agentWorkspaceId && !hasHydratedWorkspaces) {
+    router.replace(serverId ? buildHostRootRoute(serverId) : ("/" as Href));
-      return;
+  }, [router, serverId]);
-    }
-    if (!client || !isConnected) {
-      redirectedRef.current = true;
-      router.replace(buildHostRootRoute(serverId));
-    }
-  }, [agentWorkspaceId, agentId, client, hasHydratedWorkspaces, isConnected, router, serverId]);
 
-  useEffect(() => {
+  if (
-    if (redirectedRef.current) {
+    resolution.kind === "waitingForHost" ||
-      return;
+    resolution.kind === "fetchingAgent" ||
-    }
+    resolution.kind === "lookupError"
-    if (!serverId || !agentId || !client || !isConnected) {
+  ) {
-      return;
+    // Agent URLs intentionally omit workspaceId. Keep this route mounted while the target host
-    }
+    // reconnects, then resolve the workspace from the authoritative agent record.
-
+    return (
-    let cancelled = false;
+      <AgentRouteResolutionView
-    void client
+        resolution={resolution}
-      .fetchAgent({ agentId })
+        hostName={hostName}
-      .then((result) => {
+        lastHostError={runtimeSnapshot?.lastError ?? null}
-        if (cancelled || redirectedRef.current) {
+        onRetry={handleRetry}
-          return;
+        onManageHost={handleManageHost}
-        }
+        onBack={handleBack}
-        const workspaceId = normalizeWorkspaceOpaqueId(result?.agent?.workspaceId);
+      />
-        redirectedRef.current = true;
+    );
-        if (workspaceId) {
+  }
-          navigateToAgent({
-            serverId,
-            agentId,
-            workspaceId,
-          });
-          return;
-        }
-        router.replace(buildHostRootRoute(serverId));
-        return;
-      })
-      .catch(() => {
-        if (cancelled || redirectedRef.current) {
-          return;
-        }
-        redirectedRef.current = true;
-        router.replace(buildHostRootRoute(serverId));
-      });
-
-    return () => {
-      cancelled = true;
-    };
-  }, [agentId, client, isConnected, router, serverId]);
 
   return null;
 }

packages/app/src/contexts/session-context.tsx

@@ -29,6 +29,7 @@ import type { AgentAttachment, SessionOutboundMessage } from "@getpaseo/protocol
 import { parseServerInfoStatusPayload } from "@getpaseo/protocol/messages";
 import {
   buildAgentAttentionNotificationPayload,
+  type AgentAttentionReason,
   type AgentAttentionNotificationPayload,
   type NotificationPermissionRequest,
 } from "@getpaseo/protocol/agent-attention-notification";
@@ -154,6 +155,35 @@ const getLatestPermissionRequest = (
   return null;
 };
 
+interface AgentAttentionNotificationInput {
+  notification?: AgentAttentionNotificationPayload;
+  reason: AgentAttentionReason;
+  serverId: string;
+  workspaceId: string | undefined;
+  agentId: string;
+  assistantMessage: string | null;
+  permissionRequest: NotificationPermissionRequest | null;
+}
+
+function resolveAgentAttentionNotification(
+  input: AgentAttentionNotificationInput,
+): AgentAttentionNotificationPayload | null {
+  if (input.notification) {
+    return input.notification.data.workspaceId ? input.notification : null;
+  }
+  if (!input.workspaceId) {
+    return null;
+  }
+  return buildAgentAttentionNotificationPayload({
+    reason: input.reason,
+    serverId: input.serverId,
+    workspaceId: input.workspaceId,
+    agentId: input.agentId,
+    assistantMessage: input.reason === "finished" ? input.assistantMessage : null,
+    permissionRequest: input.reason === "permission" ? input.permissionRequest : null,
+  });
+}
+
 type WorkspaceSetupProgressPayload = Extract<
   SessionOutboundMessage,
   { type: "workspace_setup_progress" }
@@ -500,16 +530,20 @@ function SessionProviderInternal({ children, serverId, client }: SessionProvider
       const assistantMessage =
         findLatestAssistantMessageText(head) ?? findLatestAssistantMessageText(tail);
       const permissionRequest = getLatestPermissionRequest(session, params.agentId);
+      const workspaceId = session?.agents?.get(params.agentId)?.workspaceId;
 
-      const notification =
+      const notification = resolveAgentAttentionNotification({
-        params.notification ??
+        notification: params.notification,
-        buildAgentAttentionNotificationPayload({
+        reason: params.reason,
-          reason: params.reason,
+        serverId,
-          serverId,
+        workspaceId,
-          agentId: params.agentId,
+        agentId: params.agentId,
-          assistantMessage: params.reason === "finished" ? assistantMessage : null,
+        assistantMessage,
-          permissionRequest: params.reason === "permission" ? permissionRequest : null,
+        permissionRequest,
-        });
+      });
+      if (!notification) {
+        return;
+      }
 
       void sendOsNotification({
         title: notification.title,

packages/app/src/navigation/agent-route-resolution-view.tsx

@@ -0,0 +1,147 @@
+import { Text, View } from "react-native";
+import { ArrowLeftToLine, RotateCw, Settings } from "lucide-react-native";
+import { useTranslation } from "react-i18next";
+import { StyleSheet, withUnistyles } from "react-native-unistyles";
+import { Button } from "@/components/ui/button";
+import { LoadingSpinner } from "@/components/ui/loading-spinner";
+import type { AgentRouteResolution } from "@/navigation/agent-route-resolution";
+import { formatConnectionStatus } from "@/utils/daemons";
+import type { Theme } from "@/styles/theme";
+
+type VisibleAgentRouteResolution = Extract<
+  AgentRouteResolution,
+  { kind: "waitingForHost" | "fetchingAgent" | "lookupError" }
+>;
+
+const ThemedLoadingSpinner = withUnistyles(LoadingSpinner);
+const foregroundMutedColorMapping = (theme: Theme) => ({
+  color: theme.colors.foregroundMuted,
+});
+
+export function AgentRouteResolutionView({
+  resolution,
+  hostName,
+  lastHostError,
+  onRetry,
+  onManageHost,
+  onBack,
+}: {
+  resolution: VisibleAgentRouteResolution;
+  hostName: string;
+  lastHostError: string | null;
+  onRetry: () => void;
+  onManageHost: () => void;
+  onBack: () => void;
+}) {
+  const { t } = useTranslation();
+
+  if (resolution.kind === "fetchingAgent") {
+    return (
+      <View style={styles.emptyState} testID="agent-route-fetching">
+        <ThemedLoadingSpinner size="small" uniProps={foregroundMutedColorMapping} />
+        <View style={styles.textStack}>
+          <Text style={styles.title}>
+            {t("agentPanel.unavailable.preparingSession", { serverLabel: hostName })}
+          </Text>
+          <Text style={styles.description}>{t("agentPanel.unavailable.showSoon")}</Text>
+        </View>
+      </View>
+    );
+  }
+
+  if (resolution.kind === "lookupError") {
+    return (
+      <View style={styles.emptyState} testID="agent-route-lookup-error">
+        <View style={styles.textStack}>
+          <Text style={styles.title}>{t("agentPanel.states.failedToLoad")}</Text>
+          <Text style={styles.error}>{resolution.error}</Text>
+        </View>
+        <View style={styles.actions}>
+          <Button size="sm" variant="default" leftIcon={RotateCw} onPress={onRetry}>
+            {t("common.actions.retry")}
+          </Button>
+          <Button size="sm" variant="outline" leftIcon={ArrowLeftToLine} onPress={onBack}>
+            {t("common.actions.back")}
+          </Button>
+        </View>
+      </View>
+    );
+  }
+
+  const isConnecting =
+    resolution.connectionStatus === "connecting" || resolution.connectionStatus === "idle";
+  let title = t("workspace.route.cannotReachHost", { hostName });
+  if (isConnecting) {
+    title = t("agentPanel.unavailable.connecting", { serverLabel: hostName });
+  } else if (resolution.connectionStatus === "offline") {
+    title = t("workspace.route.hostOffline", { hostName });
+  }
+
+  return (
+    <View style={styles.emptyState} testID="agent-route-waiting-for-host">
+      {isConnecting ? (
+        <ThemedLoadingSpinner size="small" uniProps={foregroundMutedColorMapping} />
+      ) : null}
+      <View style={styles.textStack}>
+        <Text style={styles.title}>{title}</Text>
+        <Text style={styles.description}>
+          {isConnecting
+            ? t("agentPanel.unavailable.showWhenOnline")
+            : t("workspace.route.hostStatus", {
+                status: formatConnectionStatus(resolution.connectionStatus),
+              })}
+        </Text>
+        {lastHostError ? <Text style={styles.error}>{lastHostError}</Text> : null}
+      </View>
+      {!isConnecting ? (
+        <View style={styles.actions}>
+          <Button size="sm" variant="default" leftIcon={RotateCw} onPress={onRetry}>
+            {t("common.actions.retry")}
+          </Button>
+          <Button size="sm" variant="outline" leftIcon={Settings} onPress={onManageHost}>
+            {t("workspace.route.manageHost")}
+          </Button>
+        </View>
+      ) : null}
+    </View>
+  );
+}
+
+const styles = StyleSheet.create((theme) => ({
+  emptyState: {
+    flex: 1,
+    alignItems: "center",
+    justifyContent: "center",
+    gap: theme.spacing[3],
+    paddingHorizontal: theme.spacing[6],
+  },
+  textStack: {
+    alignItems: "center",
+    gap: theme.spacing[2],
+    maxWidth: 520,
+  },
+  title: {
+    color: theme.colors.foreground,
+    fontSize: theme.fontSize.base,
+    fontWeight: theme.fontWeight.normal,
+    textAlign: "center",
+  },
+  description: {
+    color: theme.colors.foregroundMuted,
+    fontSize: theme.fontSize.sm,
+    textAlign: "center",
+  },
+  error: {
+    color: theme.colors.destructive,
+    fontSize: theme.fontSize.sm,
+    lineHeight: Math.round(theme.fontSize.sm * 1.4),
+    textAlign: "center",
+  },
+  actions: {
+    flexDirection: "row",
+    alignItems: "center",
+    justifyContent: "center",
+    flexWrap: "wrap",
+    gap: theme.spacing[2],
+  },
+}));

packages/app/src/navigation/agent-route-resolution.test.ts

@@ -0,0 +1,85 @@
+import { describe, expect, it } from "vitest";
+import { resolveAgentRoute } from "@/navigation/agent-route-resolution";
+
+const VALID_ROUTE = {
+  serverId: "server-1",
+  agentId: "agent-1",
+  cachedWorkspaceId: null,
+} as const;
+
+describe("resolveAgentRoute", () => {
+  it("opens a cached workspace without waiting for its host", () => {
+    expect(
+      resolveAgentRoute({
+        ...VALID_ROUTE,
+        cachedWorkspaceId: "workspace-1",
+        connectionStatus: "offline",
+        lookup: { kind: "idle" },
+      }),
+    ).toEqual({ kind: "resolved", workspaceId: "workspace-1" });
+  });
+
+  it.each(["idle", "connecting", "offline", "error"] as const)(
+    "waits for a %s target host instead of abandoning the agent",
+    (connectionStatus) => {
+      expect(
+        resolveAgentRoute({
+          ...VALID_ROUTE,
+          connectionStatus,
+          lookup: { kind: "idle" },
+        }),
+      ).toEqual({ kind: "waitingForHost", connectionStatus });
+    },
+  );
+
+  it("fetches the agent after its target host connects", () => {
+    expect(
+      resolveAgentRoute({
+        ...VALID_ROUTE,
+        connectionStatus: "online",
+        lookup: { kind: "idle" },
+      }),
+    ).toEqual({ kind: "fetchingAgent" });
+  });
+
+  it("opens the workspace returned by the target host", () => {
+    expect(
+      resolveAgentRoute({
+        ...VALID_ROUTE,
+        connectionStatus: "online",
+        lookup: { kind: "found", workspaceId: "workspace-2" },
+      }),
+    ).toEqual({ kind: "resolved", workspaceId: "workspace-2" });
+  });
+
+  it("abandons the agent only after the target host says it is missing", () => {
+    expect(
+      resolveAgentRoute({
+        ...VALID_ROUTE,
+        connectionStatus: "online",
+        lookup: { kind: "found", workspaceId: null },
+      }),
+    ).toEqual({ kind: "notFound" });
+  });
+
+  it("keeps lookup failures retryable", () => {
+    expect(
+      resolveAgentRoute({
+        ...VALID_ROUTE,
+        connectionStatus: "online",
+        lookup: { kind: "failed", error: "connection closed" },
+      }),
+    ).toEqual({ kind: "lookupError", error: "connection closed" });
+  });
+
+  it("rejects incomplete route parameters", () => {
+    expect(
+      resolveAgentRoute({
+        ...VALID_ROUTE,
+        agentId: "",
+        connectionStatus: "online",
+        lookup: { kind: "idle" },
+      }),
+    ).toEqual({ kind: "invalid" });
+  });
+});

packages/app/src/navigation/agent-route-resolution.ts

@@ -0,0 +1,53 @@
+import type { HostRuntimeConnectionStatus } from "@/runtime/host-runtime";
+import { normalizeWorkspaceOpaqueId } from "@/utils/workspace-identity";
+
+export type AgentRouteLookup =
+  | { kind: "idle" }
+  | { kind: "fetching" }
+  | { kind: "found"; workspaceId: string | null | undefined }
+  | { kind: "failed"; error: string };
+
+export type AgentRouteResolution =
+  | { kind: "invalid" }
+  | { kind: "resolved"; workspaceId: string }
+  | {
+      kind: "waitingForHost";
+      connectionStatus: Exclude<HostRuntimeConnectionStatus, "online">;
+    }
+  | { kind: "fetchingAgent" }
+  | { kind: "notFound" }
+  | { kind: "lookupError"; error: string };
+
+export function resolveAgentRoute(input: {
+  serverId: string;
+  agentId: string;
+  cachedWorkspaceId: string | null | undefined;
+  connectionStatus: HostRuntimeConnectionStatus;
+  lookup: AgentRouteLookup;
+}): AgentRouteResolution {
+  if (!input.serverId || !input.agentId) {
+    return { kind: "invalid" };
+  }
+
+  const cachedWorkspaceId = normalizeWorkspaceOpaqueId(input.cachedWorkspaceId);
+  if (cachedWorkspaceId) {
+    return { kind: "resolved", workspaceId: cachedWorkspaceId };
+  }
+
+  if (input.connectionStatus !== "online") {
+    return { kind: "waitingForHost", connectionStatus: input.connectionStatus };
+  }
+
+  if (input.lookup.kind === "found") {
+    const fetchedWorkspaceId = normalizeWorkspaceOpaqueId(input.lookup.workspaceId);
+    return fetchedWorkspaceId
+      ? { kind: "resolved", workspaceId: fetchedWorkspaceId }
+      : { kind: "notFound" };
+  }
+
+  if (input.lookup.kind === "failed") {
+    return { kind: "lookupError", error: input.lookup.error };
+  }
+
+  return { kind: "fetchingAgent" };
+}

packages/app/src/utils/host-routes.ts

@@ -1,4 +1,5 @@
 import { Buffer } from "buffer";
+import { buildAgentDeepLinkRoute } from "@getpaseo/protocol/agent-deep-link";
 
 type NullableString = string | null | undefined;
 const BASE64_WORKSPACE_ID_PREFIX = "b64_";
@@ -389,7 +390,10 @@ export function buildHostAgentDetailRoute(serverId: string, agentId: string, wor
   if (!normalizedServerId || !normalizedAgentId) {
     return "/" as const;
   }
-  return `${buildHostRootRoute(normalizedServerId)}/agent/${encodeSegment(normalizedAgentId)}` as const;
+  return buildAgentDeepLinkRoute({
+    serverId: normalizedServerId,
+    agentId: normalizedAgentId,
+  });
 }
 
 export function buildHostRootRoute(serverId: string) {

packages/app/src/utils/notification-routing.test.ts

@@ -56,13 +56,11 @@ describe("buildNotificationRoute", () => {
         agentId: "agent-1",
         workspaceId: "ws-main",
       }),
-    ).toBe("/h/srv-1/agent/agent-1");
+    ).toBe("/h/srv-1/workspace/ws-main?open=agent%3Aagent-1");
   });
 
-  it("routes directly to server-scoped agent path when both ids are present", () => {
+  it("does not treat an incomplete notification as an agent URL", () => {
-    expect(buildNotificationRoute({ serverId: "srv-1", agentId: "agent-1" })).toBe(
+    expect(buildNotificationRoute({ serverId: "srv-1", agentId: "agent-1" })).toBe("/h/srv-1");
-      "/h/srv-1/agent/agent-1",
-    );
   });
 
   it("routes to the workspace terminal tab when workspace and terminal ids are present", () => {
@@ -98,8 +96,9 @@ describe("buildNotificationRoute", () => {
     expect(
       buildNotificationRoute({
         serverId: "srv/with/slash",
+        workspaceId: "workspace-1",
         agentId: "agent with space",
       }),
-    ).toBe("/h/srv%2Fwith%2Fslash/agent/agent%20with%20space");
+    ).toBe("/h/srv%2Fwith%2Fslash/workspace/workspace-1?open=agent%3Aagent%20with%20space");
   });
 });

packages/app/src/utils/notification-routing.ts

@@ -1,9 +1,5 @@
 import type { Href } from "expo-router";
-import {
+import { buildHostRootRoute, buildHostWorkspaceOpenRoute } from "@/utils/host-routes";
-  buildHostAgentDetailRoute,
-  buildHostRootRoute,
-  buildHostWorkspaceOpenRoute,
-} from "@/utils/host-routes";
 
 type NotificationData = Record<string, unknown> | null | undefined;
 type NotificationRoute = Extract<Href, string>;
@@ -33,8 +29,8 @@ export function resolveNotificationTarget(data: NotificationData): {
 
 export function buildNotificationRoute(data: NotificationData): NotificationRoute {
   const { serverId, agentId, workspaceId, terminalId } = resolveNotificationTarget(data);
-  if (serverId && agentId) {
+  if (serverId && workspaceId && agentId) {
-    return buildHostAgentDetailRoute(serverId, agentId);
+    return buildHostWorkspaceOpenRoute(serverId, workspaceId, `agent:${agentId}`);
   }
   if (serverId && workspaceId && terminalId) {
     return buildHostWorkspaceOpenRoute(serverId, workspaceId, `terminal:${terminalId}`);

packages/app/src/utils/os-notifications.test.ts

@@ -196,14 +196,20 @@ describe("sendOsNotification", () => {
 
     await sendOsNotification({
       title: "Agent finished",
-      data: { serverId: "srv with space", agentId: "agent/1" },
+      data: {
+        serverId: "srv with space",
+        workspaceId: "workspace-1",
+        agentId: "agent/1",
+      },
     });
 
     const clicked = created[0];
     expect(clicked.clickListeners).toHaveLength(1);
     clicked.clickListeners[0]?.({} as Event);
 
-    expect(assign).toHaveBeenCalledWith("/h/srv%20with%20space/agent/agent%2F1");
+    expect(assign).toHaveBeenCalledWith(
+      "/h/srv%20with%20space/workspace/workspace-1?open=agent%3Aagent%2F1",
+    );
   });
 
   it("returns false when the Notification API is unavailable", async () => {

packages/protocol/src/agent-attention-notification.test.ts

@@ -6,10 +6,27 @@ import {
 } from "./agent-attention-notification.js";
 
 describe("buildAgentAttentionNotificationPayload", () => {
+  it("carries the workspace needed to open a cold agent destination", () => {
+    const payload = buildAgentAttentionNotificationPayload({
+      reason: "finished",
+      serverId: "srv-1",
+      workspaceId: "workspace-1",
+      agentId: "agent-1",
+    });
+
+    expect(payload.data).toEqual({
+      serverId: "srv-1",
+      workspaceId: "workspace-1",
+      agentId: "agent-1",
+      reason: "finished",
+    });
+  });
+
   it("builds finished notifications from markdown assistant text", () => {
     const payload = buildAgentAttentionNotificationPayload({
       reason: "finished",
       serverId: "srv-1",
+      workspaceId: "workspace-1",
       agentId: "agent-1",
       assistantMessage: "**Done**. Updated `README.md` and [link](https://example.com).",
     });
@@ -19,6 +36,7 @@ describe("buildAgentAttentionNotificationPayload", () => {
       body: "Done. Updated README.md and link.",
       data: {
         serverId: "srv-1",
+        workspaceId: "workspace-1",
         agentId: "agent-1",
         reason: "finished",
       },
@@ -29,6 +47,7 @@ describe("buildAgentAttentionNotificationPayload", () => {
     const payload = buildAgentAttentionNotificationPayload({
       reason: "permission",
       serverId: "srv-2",
+      workspaceId: "workspace-2",
       agentId: "agent-2",
       permissionRequest: {
         id: "perm-1",
@@ -45,6 +64,7 @@ describe("buildAgentAttentionNotificationPayload", () => {
       body: "Approve command - Run git push",
       data: {
         serverId: "srv-2",
+        workspaceId: "workspace-2",
         agentId: "agent-2",
         reason: "permission",
       },
@@ -55,6 +75,7 @@ describe("buildAgentAttentionNotificationPayload", () => {
     const payload = buildAgentAttentionNotificationPayload({
       reason: "error",
       serverId: "srv-3",
+      workspaceId: "workspace-3",
       agentId: "agent-3",
     });
 
@@ -63,6 +84,7 @@ describe("buildAgentAttentionNotificationPayload", () => {
       body: "Encountered an error.",
       data: {
         serverId: "srv-3",
+        workspaceId: "workspace-3",
         agentId: "agent-3",
         reason: "error",
       },

packages/protocol/src/agent-attention-notification.ts

@@ -5,6 +5,7 @@ export type AgentAttentionReason = "finished" | "error" | "permission";
 export interface AgentAttentionNotificationData {
   [key: string]: unknown;
   serverId: string;
+  workspaceId?: string;
   agentId: string;
   reason: AgentAttentionReason;
 }
@@ -18,6 +19,7 @@ export interface AgentAttentionNotificationPayload {
 interface BuildAgentAttentionNotificationPayloadInput {
   reason: AgentAttentionReason;
   serverId: string;
+  workspaceId: string;
   agentId: string;
   assistantMessage?: string | null;
   permissionRequest?: NotificationPermissionRequest | null;
@@ -203,6 +205,7 @@ export function buildAgentAttentionNotificationPayload(
     body,
     data: {
       serverId: input.serverId,
+      workspaceId: input.workspaceId,
       agentId: input.agentId,
       reason: input.reason,
     },

packages/protocol/src/agent-deep-link.ts

@@ -7,18 +7,24 @@ function normalizeSegment(value: string): string {
   return value.trim();
 }
 
-export function buildAgentDeepLink(target: AgentDeepLinkTarget): string {
+function normalizeAgentDeepLinkTarget(target: AgentDeepLinkTarget): AgentDeepLinkTarget {
   const serverId = normalizeSegment(target.serverId);
   const agentId = normalizeSegment(target.agentId);
   if (!serverId || !agentId) {
     throw new Error("Agent deep links require a server ID and agent ID.");
   }
-  return `paseo://h/${encodeURIComponent(serverId)}/agent/${encodeURIComponent(agentId)}`;
+  return { serverId, agentId };
 }
 
-export function buildAgentDeepLinkRoute(target: AgentDeepLinkTarget): string {
+export function buildAgentDeepLinkRoute(
-  const link = new URL(buildAgentDeepLink(target));
+  target: AgentDeepLinkTarget,
-  return `/h${link.pathname}`;
+): `/h/${string}/agent/${string}` {
+  const { serverId, agentId } = normalizeAgentDeepLinkTarget(target);
+  return `/h/${encodeURIComponent(serverId)}/agent/${encodeURIComponent(agentId)}`;
+}
+
+export function buildAgentDeepLink(target: AgentDeepLinkTarget): string {
+  return `paseo:/${buildAgentDeepLinkRoute(target)}`;
 }
 
 export function parseAgentDeepLink(input: string): AgentDeepLinkTarget | null {

packages/protocol/src/messages.ts

@@ -658,6 +658,7 @@ export const AgentStreamEventPayloadSchema = z.discriminatedUnion("type", [
         body: z.string(),
         data: z.object({
           serverId: z.string(),
+          workspaceId: z.string().optional(),
           agentId: z.string(),
           reason: z.enum(["finished", "error", "permission"]),
         }),
@@ -3564,6 +3565,7 @@ export const AgentAttentionRequiredMessageSchema = z.object({
         body: z.string(),
         data: z.object({
           serverId: z.string(),
+          workspaceId: z.string().optional(),
           agentId: z.string(),
           reason: z.enum(["finished", "error", "permission"]),
         }),

packages/protocol/tests/validation/ws-outbound.test.ts

@@ -138,6 +138,65 @@ const SourceSchema = z.object({
     );
   });
 
+  it.each([
+    {
+      name: "dedicated attention message",
+      message: {
+        type: "agent_attention_required",
+        payload: {
+          agentId: "agent-1",
+          reason: "finished",
+          timestamp: "2026-07-22T18:00:00.000Z",
+          shouldNotify: true,
+          notification: {
+            title: "Agent finished",
+            body: "Done",
+            data: {
+              serverId: "server-1",
+              workspaceId: "workspace-1",
+              agentId: "agent-1",
+              reason: "finished",
+            },
+          },
+        },
+      },
+    },
+    {
+      name: "agent stream attention event",
+      message: {
+        type: "agent_stream",
+        payload: {
+          agentId: "agent-1",
+          timestamp: "2026-07-22T18:00:00.000Z",
+          event: {
+            type: "attention_required",
+            provider: "codex",
+            reason: "finished",
+            timestamp: "2026-07-22T18:00:00.000Z",
+            shouldNotify: true,
+            notification: {
+              title: "Agent finished",
+              body: "Done",
+              data: {
+                serverId: "server-1",
+                workspaceId: "workspace-1",
+                agentId: "agent-1",
+                reason: "finished",
+              },
+            },
+          },
+        },
+      },
+    },
+  ])("preserves workspaceId in a $name", ({ message }) => {
+    const envelope = { type: "session", message };
+
+    expect(GeneratedWSOutboundMessageSchema.safeParse(envelope)).toEqual({
+      success: true,
+      data: envelope,
+    });
+  });
+
   it("emits runtime imports with .js extensions", async () => {
     const generated = await readFile(generatedWSOutboundPath, "utf8");
     expect(generated).toContain('from "../../validation/ws-outbound-schema-metadata.js"');

packages/server/src/server/websocket-server.notifications.test.ts

@@ -14,6 +14,8 @@ import { createProviderSnapshotManagerStub } from "./test-utils/session-stubs.js
 import type { PushNotificationSender, PushPayload } from "./push/notifications.js";
 import type { WorkspaceAutoName } from "./workspace-auto-name.js";
 
+const WORKSPACE_ID = "workspace-1";
+
 const wsModuleMock = vi.hoisted(() => {
   class MockWebSocketServer {
     readonly handlers = new Map<string, (...args: unknown[]) => void>();
@@ -86,7 +88,7 @@ function createServer(agentManagerOverrides?: Record<string, unknown>) {
   const agentManager = {
     subscribe: vi.fn(() => () => {}),
     setAgentAttentionCallback: vi.fn(),
-    getAgent: vi.fn(() => null),
+    getAgent: vi.fn(() => ({ workspaceId: WORKSPACE_ID, pendingPermissions: new Map() })),
     getLastAssistantMessage: vi.fn(async () => null),
     getMetricsSnapshot: vi.fn(() => ({
       total: 0,
@@ -225,6 +227,7 @@ describe("VoiceAssistantWebSocketServer notification payloads", () => {
       getAgent: vi.fn(() => ({
         config: { title: null },
         cwd: "/tmp/worktree",
+        workspaceId: WORKSPACE_ID,
         pendingPermissions: new Map(),
       })),
       getLastAssistantMessage,
@@ -242,6 +245,7 @@ describe("VoiceAssistantWebSocketServer notification payloads", () => {
         body: "Done. Updated README.md and link.",
         data: {
           serverId: "srv-test",
+          workspaceId: WORKSPACE_ID,
           agentId: "agent-1",
           reason: "finished",
         },
@@ -256,6 +260,7 @@ describe("VoiceAssistantWebSocketServer notification payloads", () => {
       getAgent: vi.fn(() => ({
         config: { title: null },
         cwd: "/tmp/worktree",
+        workspaceId: WORKSPACE_ID,
         labels: {},
         pendingPermissions: new Map(),
       })),

packages/server/src/server/websocket-server.ts

@@ -2152,13 +2152,17 @@ export class VoiceAssistantWebSocketServer {
     const allStates = clientEntries.map((e) => e.state);
     const nowMs = Date.now();
     const agent = this.agentManager.getAgent(params.agentId);
+    if (!agent?.workspaceId) {
+      return;
+    }
     const assistantMessage = await this.agentManager.getLastAssistantMessage(params.agentId);
     const notification = buildAgentAttentionNotificationPayload({
       reason: params.reason,
       serverId: this.serverId,
+      workspaceId: agent.workspaceId,
       agentId: params.agentId,
       assistantMessage,
-      permissionRequest: agent ? findLatestPermissionRequest(agent.pendingPermissions) : null,
+      permissionRequest: findLatestPermissionRequest(agent.pendingPermissions),
     });
 
     const plan = computeNotificationPlan({