diff --git a/apps/desktop/src/main.tsx b/apps/desktop/src/main.tsx
index cd87d09..8d916f7 100644
--- a/apps/desktop/src/main.tsx
+++ b/apps/desktop/src/main.tsx
@@ -11,6 +11,7 @@ import { cn } from "./lib/utils"
 import { ChatApp } from "./chat"
 import { DeactivationScreen } from "./components/DeactivationScreen"
 import type { SessionStartedEvent, UnreadUpdateEvent, NewMessageEvent, SessionEndedEvent } from "./chat/types"
+import { subscribeMachineUpdates } from "./chat/convexMachineClient"
 
 type MachineOs = {
   name: string
@@ -1083,6 +1084,38 @@ const resolvedAppUrl = useMemo(() => {
     }
   }, [token])
 
+  // Assinatura direta no Convex para abrir/minimizar chat quando houver novas mensagens
+  useEffect(() => {
+    if (!token) return
+
+    let prevUnread = 0
+    let unsub: (() => void) | null = null
+    subscribeMachineUpdates(
+      (payload) => {
+        if (!payload) return
+        const totalUnread = payload.totalUnread ?? 0
+        const hasSessions = (payload.sessions ?? []).length > 0
+
+        // Abre/minimiza chat quando aparecem novas não lidas
+        if (hasSessions && totalUnread > prevUnread) {
+          const ticketId = payload.sessions[0].ticketId
+          invoke("open_chat_window", { ticketId }).catch(console.error)
+          // Minimiza para não ser intrusivo
+          invoke("set_chat_minimized", { ticketId, minimized: true }).catch(console.error)
+        }
+
+        prevUnread = totalUnread
+      },
+      (err) => console.error("chat updates (Convex) erro:", err)
+    ).then((u) => {
+      unsub = u
+    })
+
+    return () => {
+      unsub?.()
+    }
+  }, [token])
+
   async function register() {
     if (!profile) return
     const trimmedCode = provisioningCode.trim().toLowerCase()