diff --git a/packages/tui/src/context/session-tabs.tsx b/packages/tui/src/context/session-tabs.tsx
index 9dd11c67ed..202ad89cc5 100644
--- a/packages/tui/src/context/session-tabs.tsx
+++ b/packages/tui/src/context/session-tabs.tsx
@@ -1,4 +1,4 @@
-import { createEffect, createMemo, createSignal, onCleanup } from "solid-js"
+import { createEffect, createMemo, createSignal, on, onCleanup } from "solid-js"
 import { useKeyboard, useRenderer } from "@opentui/solid"
 import { isDeepEqual } from "remeda"
 import { createSimpleContext } from "./helper"
@@ -156,26 +156,30 @@ export const { use: useSessionTabs, provider: SessionTabsProvider } = createSimp
       }
     }
 
-    createEffect(() => {
-      if (!enabled()) return
-      if (route.data.type !== "session" || route.data.sessionID === "dummy") return
-      const sessionID = root(route.data.sessionID)
-      cancelledTabs.delete(sessionID)
-      history = recordSessionTabHistory(history, sessionID)
-      const fallback = newTab() ? NEW_SESSION_TAB_TITLE : undefined
-      const tabs = openSessionTab(state().tabs, {
-        sessionID,
-        title: title(sessionID, state().tabs.find((tab) => tab.sessionID === sessionID)?.title, fallback),
-      })
-      if (tabs === state().tabs) return
-      update((draft) => {
-        if (cancelledTabs.has(sessionID)) return
-        draft.tabs = openSessionTab(draft.tabs, {
-          sessionID,
-          title: title(sessionID, draft.tabs.find((tab) => tab.sessionID === sessionID)?.title, fallback),
-        })
-      })
-    })
+    // Shared storage updates must not re-admit a tab unless this client changes route or scope.
+    createEffect(
+      on(
+        [
+          () => (enabled() && route.data.type === "session" ? route.data.sessionID : undefined),
+          () => config.tabs.scope,
+        ],
+        ([routed]) => {
+          if (!routed || routed === "dummy") return
+          const sessionID = root(routed)
+          cancelledTabs.delete(sessionID)
+          history = recordSessionTabHistory(history, sessionID)
+          if (state().tabs.some((tab) => tab.sessionID === sessionID)) return
+          const fallback = newTab() ? NEW_SESSION_TAB_TITLE : undefined
+          update((draft) => {
+            if (cancelledTabs.has(sessionID)) return
+            draft.tabs = openSessionTab(draft.tabs, {
+              sessionID,
+              title: title(sessionID, draft.tabs.find((tab) => tab.sessionID === sessionID)?.title, fallback),
+            })
+          })
+        },
+      ),
+    )
 
     // Viewed state is server-global, so acknowledgement runs even with tabs disabled: other
     // clients rely on this client reporting what its user has seen.
diff --git a/packages/tui/test/context/session-tabs.test.tsx b/packages/tui/test/context/session-tabs.test.tsx
index 63fe46f027..7541a06aa5 100644
--- a/packages/tui/test/context/session-tabs.test.tsx
+++ b/packages/tui/test/context/session-tabs.test.tsx
@@ -505,6 +505,34 @@ test("concurrent TUIs do not alternate shared tab titles from divergent session
   }
 })
 
+test("closing a tab is not undone by another TUI viewing the same session", async () => {
+  await using temporary = await tmpdir()
+  const clients: Awaited<ReturnType<typeof renderSessionTabs>>[] = []
+
+  try {
+    const first = await renderSessionTabs("shared", { state: temporary.path })
+    clients.push(first)
+    const second = await renderSessionTabs("shared", { state: temporary.path })
+    clients.push(second)
+    await wait(() => first.tabs.tabs().some((tab) => tab.sessionID === "shared"))
+    await wait(() => second.tabs.tabs().some((tab) => tab.sessionID === "shared"))
+    first.tabs.close()
+    await wait(() => first.route.data.type === "home")
+    await wait(() => !second.tabs.tabs().some((tab) => tab.sessionID === "shared"))
+    await Promise.all([first.flush(), second.flush()])
+
+    const stored = await Bun.file(path.join(temporary.path, "test", "tui", "tabs.json")).json()
+    expect(stored.cwd[directory].tabs).toEqual([])
+
+    second.route.navigate({ type: "home" })
+    await wait(() => second.route.data.type === "home")
+    second.route.navigate({ type: "session", sessionID: "shared" })
+    await wait(() => first.tabs.tabs().some((tab) => tab.sessionID === "shared"))
+  } finally {
+    await Promise.allSettled(clients.map((client) => client.destroy()))
+  }
+})
+
 test("user prompt admissions pulse an already-busy background tab", async () => {
   const setup = await renderSessionTabs("background")
   const admitted = (sessionID: string, inboxID: string): OpenCodeEvent => ({