diff --git a/src/renderer/src/app-shell/use-app-shell-services.ts b/src/renderer/src/app-shell/use-app-shell-services.ts
index 6c52abb6518..879fcea5984 100644
--- a/src/renderer/src/app-shell/use-app-shell-services.ts
+++ b/src/renderer/src/app-shell/use-app-shell-services.ts
@@ -21,6 +21,7 @@ import { useRemoteRuntimeRecoveryTriggers } from '../runtime/use-remote-runtime-
 import { useTerminalViewerColorPublication } from './use-terminal-viewer-color-publication'
 import { useBrowserIdentityMigrationNotice } from '../components/browser-pane/browser-user-agent-migration-notice'
 import { useCodexTerminalServerIsolationNotice } from '../components/terminal-pane/codex-terminal-server-isolation-notice'
+import { useCodexSharedSettingsNotice } from '../components/terminal-pane/codex-shared-settings-notice'
 
 /**
  * App-level subscriptions that must outlive any individual surface. Each one is here because
@@ -56,4 +57,5 @@ export function useAppShellServices(options: { floatingPanelVisible: boolean }):
   useOsc52ClipboardDefaultOnNotice(persistedUIReady)
   useBrowserIdentityMigrationNotice()
   useCodexTerminalServerIsolationNotice()
+  useCodexSharedSettingsNotice()
 }
diff --git a/src/renderer/src/components/terminal-pane/codex-notice-test-harness.ts b/src/renderer/src/components/terminal-pane/codex-notice-test-harness.ts
new file mode 100644
index 00000000000..152f09d67f8
--- /dev/null
+++ b/src/renderer/src/components/terminal-pane/codex-notice-test-harness.ts
@@ -0,0 +1,37 @@
+import { act, createElement } from 'react'
+import { createRoot, type Root } from 'react-dom/client'
+import { useStore } from 'zustand'
+import { createStore } from 'zustand/vanilla'
+
+type NoticeTestState = Record<string, unknown>
+
+/** Stands in for `@/store`: a real zustand store, so selectors re-render and subscribe fires. */
+export const noticeTestStore = createStore<NoticeTestState>()(() => ({}))
+
+export const useAppStore = Object.assign(
+  <T>(selector: (state: NoticeTestState) => T): T => useStore(noticeTestStore, selector),
+  noticeTestStore
+)
+
+const mountedRoots: Root[] = []
+
+export async function mountHook(useHook: () => void): Promise<void> {
+  function HookProbe(): null {
+    useHook()
+    return null
+  }
+  const root = createRoot(document.createElement('div'))
+  mountedRoots.push(root)
+  await act(async () => root.render(createElement(HookProbe)))
+}
+
+export function unmountHooks(): void {
+  for (const root of mountedRoots.splice(0)) {
+    act(() => root.unmount())
+  }
+}
+
+/** Applies a store write and lets the hook re-render before returning. */
+export async function setNoticeState(patch: NoticeTestState): Promise<void> {
+  await act(async () => noticeTestStore.setState(patch))
+}
diff --git a/src/renderer/src/components/terminal-pane/codex-shared-settings-notice.test.ts b/src/renderer/src/components/terminal-pane/codex-shared-settings-notice.test.ts
new file mode 100644
index 00000000000..a9de1beb870
--- /dev/null
+++ b/src/renderer/src/components/terminal-pane/codex-shared-settings-notice.test.ts
@@ -0,0 +1,89 @@
+// @vitest-environment happy-dom
+
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import {
+  mountHook,
+  noticeTestStore,
+  setNoticeState,
+  unmountHooks
+} from './codex-notice-test-harness'
+import { useCodexSharedSettingsNotice } from './codex-shared-settings-notice'
+
+const { toastInfoMock } = vi.hoisted(() => ({ toastInfoMock: vi.fn() }))
+
+vi.mock('sonner', () => ({ toast: { info: toastInfoMock } }))
+vi.mock('@/store', () => import('./codex-notice-test-harness'))
+
+const codexTab = { 'wt-1': [{ id: 'tab-1', launchAgent: 'codex' }] }
+
+function resetStore(overrides: Record<string, unknown> = {}): void {
+  noticeTestStore.setState(
+    {
+      codexSharedSettingsNoticeSeen: false,
+      tabsByWorktree: {},
+      agentStatusByPaneKey: {},
+      paneForegroundAgentByPaneKey: {},
+      markCodexSharedSettingsNoticeSeen: () =>
+        noticeTestStore.setState({ codexSharedSettingsNoticeSeen: true }),
+      ...overrides
+    },
+    true
+  )
+}
+
+const isSeen = (): unknown => noticeTestStore.getState().codexSharedSettingsNoticeSeen
+
+describe('useCodexSharedSettingsNotice', () => {
+  beforeEach(() => {
+    toastInfoMock.mockReset()
+    vi.stubGlobal('navigator', { userAgent: 'Mozilla/5.0 (Windows NT 10.0; Win64; x64)' })
+    resetStore()
+  })
+
+  afterEach(() => {
+    unmountHooks()
+    vi.unstubAllGlobals()
+  })
+
+  it('shows once on Windows when a Codex terminal appears, and marks it seen', async () => {
+    await mountHook(useCodexSharedSettingsNotice)
+    expect(toastInfoMock).not.toHaveBeenCalled()
+
+    await setNoticeState({ tabsByWorktree: codexTab })
+    await setNoticeState({ agentStatusByPaneKey: { 'tab-1:leaf': { agentType: 'codex' } } })
+
+    expect(toastInfoMock).toHaveBeenCalledTimes(1)
+    expect(toastInfoMock).toHaveBeenCalledWith('Codex in Orca now uses ~/.codex', {
+      id: 'codex-shared-settings-notice',
+      description:
+        'Codex may ask again to trust folders or approve commands. Re-add any MCP servers you added only in Orca.',
+      duration: Infinity
+    })
+    expect(isSeen()).toBe(true)
+  })
+
+  it('stays quiet off Windows', async () => {
+    vi.stubGlobal('navigator', { userAgent: 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7)' })
+    resetStore({ tabsByWorktree: codexTab })
+    await mountHook(useCodexSharedSettingsNotice)
+    expect(toastInfoMock).not.toHaveBeenCalled()
+    expect(isSeen()).toBe(false)
+  })
+
+  it('stays quiet in a paired web client window', async () => {
+    vi.stubGlobal('__ORCA_WEB_CLIENT__', true)
+    resetStore({ tabsByWorktree: codexTab })
+    await mountHook(useCodexSharedSettingsNotice)
+    expect(toastInfoMock).not.toHaveBeenCalled()
+  })
+
+  it('shows once the persisted seen flag loads after mount', async () => {
+    // Why seen: true: the store's default until persisted UI arrives.
+    resetStore({ codexSharedSettingsNoticeSeen: true, tabsByWorktree: codexTab })
+    await mountHook(useCodexSharedSettingsNotice)
+    expect(toastInfoMock).not.toHaveBeenCalled()
+
+    await setNoticeState({ codexSharedSettingsNoticeSeen: false })
+    expect(toastInfoMock).toHaveBeenCalledTimes(1)
+  })
+})
diff --git a/src/renderer/src/components/terminal-pane/codex-shared-settings-notice.ts b/src/renderer/src/components/terminal-pane/codex-shared-settings-notice.ts
new file mode 100644
index 00000000000..db05a38d4e7
--- /dev/null
+++ b/src/renderer/src/components/terminal-pane/codex-shared-settings-notice.ts
@@ -0,0 +1,37 @@
+import { useEffect } from 'react'
+import { toast } from 'sonner'
+import { translate } from '@/i18n/i18n'
+import { useAppStore } from '@/store'
+import { isLocalWindowsDesktopClient } from '@/lib/desktop-window-chrome'
+import { whenCodexTerminalAppears } from './codex-terminal-presence'
+
+function showCodexSharedSettingsNotice(): void {
+  // Why mark before showing: seen means shown, so a quit or reload never repeats it.
+  useAppStore.getState().markCodexSharedSettingsNoticeSeen()
+  toast.info(
+    translate('terminal.codexSharedSettingsNotice.title', 'Codex in Orca now uses ~/.codex'),
+    {
+      // Why a stable id: a late sync that resets the flag can't stack a second toast.
+      id: 'codex-shared-settings-notice',
+      description: translate(
+        'terminal.codexSharedSettingsNotice.description',
+        'Codex may ask again to trust folders or approve commands. Re-add any MCP servers you added only in Orca.'
+      ),
+      // Why no timeout: it is marked seen before showing, so an auto-close would lose it for good.
+      duration: Infinity
+    }
+  )
+}
+
+export function useCodexSharedSettingsNotice(): void {
+  // Why no hydration check: the flag defaults to true until the persisted value arrives.
+  const seen = useAppStore((s) => s.codexSharedSettingsNoticeSeen)
+
+  useEffect(() => {
+    // Why skip paired web clients: the change is on the host, whose own window shows this.
+    if (seen || !isLocalWindowsDesktopClient()) {
+      return
+    }
+    return whenCodexTerminalAppears(showCodexSharedSettingsNotice)
+  }, [seen])
+}
diff --git a/src/renderer/src/components/terminal-pane/codex-terminal-presence.test.ts b/src/renderer/src/components/terminal-pane/codex-terminal-presence.test.ts
new file mode 100644
index 00000000000..51428c9d3f9
--- /dev/null
+++ b/src/renderer/src/components/terminal-pane/codex-terminal-presence.test.ts
@@ -0,0 +1,56 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { noticeTestStore } from './codex-notice-test-harness'
+import { whenCodexTerminalAppears } from './codex-terminal-presence'
+
+vi.mock('@/store', () => import('./codex-notice-test-harness'))
+
+describe('whenCodexTerminalAppears', () => {
+  beforeEach(() => {
+    noticeTestStore.setState(
+      { tabsByWorktree: {}, agentStatusByPaneKey: {}, paneForegroundAgentByPaneKey: {} },
+      true
+    )
+  })
+
+  it.each([
+    ['an Orca-launched Codex tab', { tabsByWorktree: { 'wt-1': [{ launchAgent: 'codex' }] } }],
+    ['a hook-reported Codex', { agentStatusByPaneKey: { 'tab-1:leaf': { agentType: 'codex' } } }],
+    [
+      'a typed codex in the foreground',
+      { paneForegroundAgentByPaneKey: { 'tab-1:leaf': { agent: 'codex' } } }
+    ]
+  ])('calls back once for %s', (_name, patch) => {
+    const onAppear = vi.fn()
+    whenCodexTerminalAppears(onAppear)
+
+    noticeTestStore.setState(patch)
+    noticeTestStore.setState({ tabsByWorktree: { 'wt-2': [{ launchAgent: 'codex' }] } })
+
+    expect(onAppear).toHaveBeenCalledTimes(1)
+  })
+
+  it('calls back at once when a Codex terminal already exists', () => {
+    noticeTestStore.setState({ tabsByWorktree: { 'wt-1': [{ launchAgent: 'codex' }] } })
+    const onAppear = vi.fn()
+    whenCodexTerminalAppears(onAppear)
+    expect(onAppear).toHaveBeenCalledTimes(1)
+  })
+
+  it('ignores other agents', () => {
+    const onAppear = vi.fn()
+    whenCodexTerminalAppears(onAppear)
+    noticeTestStore.setState({
+      tabsByWorktree: { 'wt-1': [{ launchAgent: 'claude' }] },
+      agentStatusByPaneKey: { 'tab-1:leaf': { agentType: 'claude' } },
+      paneForegroundAgentByPaneKey: { 'tab-1:leaf': { agent: 'opencode' } }
+    })
+    expect(onAppear).not.toHaveBeenCalled()
+  })
+
+  it('stops watching once unsubscribed', () => {
+    const onAppear = vi.fn()
+    whenCodexTerminalAppears(onAppear)()
+    noticeTestStore.setState({ tabsByWorktree: { 'wt-1': [{ launchAgent: 'codex' }] } })
+    expect(onAppear).not.toHaveBeenCalled()
+  })
+})
diff --git a/src/renderer/src/components/terminal-pane/codex-terminal-presence.ts b/src/renderer/src/components/terminal-pane/codex-terminal-presence.ts
new file mode 100644
index 00000000000..6afcd315642
--- /dev/null
+++ b/src/renderer/src/components/terminal-pane/codex-terminal-presence.ts
@@ -0,0 +1,37 @@
+import { useAppStore } from '@/store'
+import type { AppState } from '@/store/types'
+
+// Why three sources: Orca-launched tabs, hook-reported agents (SSH too), and a typed `codex` seen locally.
+function hasCodexTerminal(state: AppState): boolean {
+  return (
+    Object.values(state.tabsByWorktree).some((tabs) =>
+      tabs.some((tab) => tab.launchAgent === 'codex')
+    ) ||
+    Object.values(state.agentStatusByPaneKey).some((entry) => entry.agentType === 'codex') ||
+    Object.values(state.paneForegroundAgentByPaneKey).some((entry) => entry.agent === 'codex')
+  )
+}
+
+function didSourcesChange(state: AppState, previous: AppState): boolean {
+  return (
+    state.tabsByWorktree !== previous.tabsByWorktree ||
+    state.agentStatusByPaneKey !== previous.agentStatusByPaneKey ||
+    state.paneForegroundAgentByPaneKey !== previous.paneForegroundAgentByPaneKey
+  )
+}
+
+/** Calls `onAppear` once, as soon as a Codex terminal exists. Returns the unsubscribe. */
+export function whenCodexTerminalAppears(onAppear: () => void): () => void {
+  if (hasCodexTerminal(useAppStore.getState())) {
+    onAppear()
+    return () => {}
+  }
+  // Why a filtered subscription: a selector would rescan every tab on each store write.
+  const unsubscribe = useAppStore.subscribe((state, previous) => {
+    if (didSourcesChange(state, previous) && hasCodexTerminal(state)) {
+      unsubscribe()
+      onAppear()
+    }
+  })
+  return unsubscribe
+}
diff --git a/src/renderer/src/components/terminal-pane/codex-terminal-server-isolation-notice.test.ts b/src/renderer/src/components/terminal-pane/codex-terminal-server-isolation-notice.test.ts
index ce7ee221898..87878d6fe4d 100644
--- a/src/renderer/src/components/terminal-pane/codex-terminal-server-isolation-notice.test.ts
+++ b/src/renderer/src/components/terminal-pane/codex-terminal-server-isolation-notice.test.ts
@@ -1,43 +1,27 @@
 // @vitest-environment happy-dom
 
-import { act, createElement } from 'react'
-import { createRoot, type Root } from 'react-dom/client'
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
 import { CODEX_TERMINAL_SERVER_ISOLATION_SETTINGS_TARGET_ID } from '@/lib/settings-navigation-types'
+import {
+  mountHook,
+  noticeTestStore,
+  setNoticeState,
+  unmountHooks
+} from './codex-notice-test-harness'
 import { useCodexTerminalServerIsolationNotice } from './codex-terminal-server-isolation-notice'
 
-// Why a real zustand store double: the hook relies on subscribe/setState semantics.
-const { toastInfoMock, harness } = vi.hoisted(() => ({
-  toastInfoMock: vi.fn(),
-  harness: { setState: (_patch: Record<string, unknown>, _replace?: true): void => {} }
-}))
+const { toastInfoMock } = vi.hoisted(() => ({ toastInfoMock: vi.fn() }))
 
 vi.mock('sonner', () => ({ toast: { info: toastInfoMock } }))
-
-vi.mock('@/store', async () => {
-  const { createStore } = await import('zustand/vanilla')
-  const backing = createStore<Record<string, unknown>>()(() => ({}))
-  harness.setState = (patch, replace) =>
-    replace ? backing.setState(patch, true) : backing.setState(patch)
-  const useAppStore = <T>(selector: (state: Record<string, unknown>) => T): T =>
-    selector(backing.getState())
-  return { useAppStore: Object.assign(useAppStore, backing) }
-})
-
-const store = {
-  setState: (patch: Record<string, unknown>, replace?: true) => harness.setState(patch, replace)
-}
-let seen = false
+vi.mock('@/store', () => import('./codex-notice-test-harness'))
 
 const openSettingsPage = vi.fn()
 const openSettingsTarget = vi.fn()
-const mountedRoots: Root[] = []
+const codexTab = { 'wt-1': [{ id: 'tab-1', launchAgent: 'codex' }] }
 
 function resetStore(overrides: Record<string, unknown> = {}): void {
-  seen = false
-  store.setState(
+  noticeTestStore.setState(
     {
-      persistedUIReady: true,
       codexTerminalServerIsolationNoticeSeen: false,
       settings: { codexTerminalServerIsolation: true },
       tabsByWorktree: {},
@@ -45,33 +29,14 @@ function resetStore(overrides: Record<string, unknown> = {}): void {
       paneForegroundAgentByPaneKey: {},
       openSettingsPage,
       openSettingsTarget,
-      markCodexTerminalServerIsolationNoticeSeen: () => {
-        seen = true
-        store.setState({ codexTerminalServerIsolationNoticeSeen: true })
-      },
+      markCodexTerminalServerIsolationNoticeSeen: () =>
+        noticeTestStore.setState({ codexTerminalServerIsolationNoticeSeen: true }),
       ...overrides
     },
     true
   )
 }
 
-function HookProbe(): null {
-  useCodexTerminalServerIsolationNotice()
-  return null
-}
-
-async function mountProbe(): Promise<void> {
-  const container = document.createElement('div')
-  document.body.appendChild(container)
-  const root = createRoot(container)
-  mountedRoots.push(root)
-  await act(async () => {
-    root.render(createElement(HookProbe))
-  })
-}
-
-const codexTab = { 'wt-1': [{ id: 'tab-1', launchAgent: 'codex' }] }
-
 describe('useCodexTerminalServerIsolationNotice', () => {
   beforeEach(() => {
     toastInfoMock.mockReset()
@@ -80,65 +45,50 @@ describe('useCodexTerminalServerIsolationNotice', () => {
     resetStore()
   })
 
-  afterEach(() => {
-    for (const root of mountedRoots.splice(0)) {
-      act(() => root.unmount())
-    }
-    document.body.innerHTML = ''
-  })
+  afterEach(unmountHooks)
 
   it('shows once when the first Codex terminal starts, and marks it seen', async () => {
-    await mountProbe()
+    await mountHook(useCodexTerminalServerIsolationNotice)
     expect(toastInfoMock).not.toHaveBeenCalled()
 
-    act(() => store.setState({ tabsByWorktree: codexTab }))
-    act(() => store.setState({ agentStatusByPaneKey: { 'tab-2:leaf': { agentType: 'codex' } } }))
+    await setNoticeState({ tabsByWorktree: codexTab })
+    await setNoticeState({ agentStatusByPaneKey: { 'tab-2:leaf': { agentType: 'codex' } } })
 
     expect(toastInfoMock).toHaveBeenCalledTimes(1)
     expect(toastInfoMock.mock.calls[0]?.[1]).toMatchObject({ duration: Infinity })
-    expect(seen).toBe(true)
-  })
-
-  it.each([
-    [
-      'a typed codex seen by hooks',
-      { agentStatusByPaneKey: { 'tab-1:leaf': { agentType: 'codex' } } }
-    ],
-    [
-      'a typed codex in the foreground',
-      { paneForegroundAgentByPaneKey: { 'tab-1:leaf': { agent: 'codex' } } }
-    ]
-  ])('also triggers on %s', async (_name, patch) => {
-    await mountProbe()
-    act(() => store.setState(patch))
-    expect(toastInfoMock).toHaveBeenCalledTimes(1)
-  })
-
-  it('never shows for other agents', async () => {
-    await mountProbe()
-    act(() =>
-      store.setState({
-        tabsByWorktree: { 'wt-1': [{ id: 'tab-1', launchAgent: 'claude' }] },
-        agentStatusByPaneKey: { 'tab-1:leaf': { agentType: 'claude' } },
-        paneForegroundAgentByPaneKey: { 'tab-1:leaf': { agent: 'opencode' } }
-      })
-    )
-    expect(toastInfoMock).not.toHaveBeenCalled()
+    expect(noticeTestStore.getState().codexTerminalServerIsolationNoticeSeen).toBe(true)
   })
 
   it.each([
     ['it was already seen', { codexTerminalServerIsolationNoticeSeen: true }],
     ['the user turned the setting off', { settings: { codexTerminalServerIsolation: false } }],
-    ['persisted UI has not hydrated', { persistedUIReady: false }]
+    ['settings have not loaded', { settings: null }]
   ])('stays quiet when %s', async (_name, overrides) => {
     resetStore({ ...overrides, tabsByWorktree: codexTab })
-    await mountProbe()
+    await mountHook(useCodexTerminalServerIsolationNotice)
+    expect(toastInfoMock).not.toHaveBeenCalled()
+  })
+
+  it('shows once the persisted seen flag loads after mount', async () => {
+    // Why seen: true: the store's default until persisted UI arrives.
+    resetStore({ codexTerminalServerIsolationNoticeSeen: true, tabsByWorktree: codexTab })
+    await mountHook(useCodexTerminalServerIsolationNotice)
+    expect(toastInfoMock).not.toHaveBeenCalled()
+
+    await setNoticeState({ codexTerminalServerIsolationNoticeSeen: false })
+    expect(toastInfoMock).toHaveBeenCalledTimes(1)
+  })
+
+  it('stops waiting when the user turns the setting off', async () => {
+    await mountHook(useCodexTerminalServerIsolationNotice)
+    await setNoticeState({ settings: { codexTerminalServerIsolation: false } })
+    await setNoticeState({ tabsByWorktree: codexTab })
     expect(toastInfoMock).not.toHaveBeenCalled()
   })
 
   it('opens Settings at the Codex server setting', async () => {
     resetStore({ tabsByWorktree: codexTab })
-    await mountProbe()
+    await mountHook(useCodexTerminalServerIsolationNotice)
 
     toastInfoMock.mock.calls[0]?.[1]?.action.onClick()
 
diff --git a/src/renderer/src/components/terminal-pane/codex-terminal-server-isolation-notice.ts b/src/renderer/src/components/terminal-pane/codex-terminal-server-isolation-notice.ts
index 4fe87294bdf..b04e63d8f00 100644
--- a/src/renderer/src/components/terminal-pane/codex-terminal-server-isolation-notice.ts
+++ b/src/renderer/src/components/terminal-pane/codex-terminal-server-isolation-notice.ts
@@ -6,46 +6,15 @@ import type { AppState } from '@/store/types'
 import { isPairedWebClientWindow } from '@/lib/desktop-window-chrome'
 import { CODEX_TERMINAL_SERVER_ISOLATION_SETTINGS_TARGET_ID } from '@/lib/settings-navigation-types'
 import { isCodexTerminalServerIsolationEnabled } from '../../../../shared/codex-terminal-server-isolation'
+import { whenCodexTerminalAppears } from './codex-terminal-presence'
 
-type CodexNoticeState = Pick<
-  AppState,
-  | 'persistedUIReady'
-  | 'codexTerminalServerIsolationNoticeSeen'
-  | 'settings'
-  | 'tabsByWorktree'
-  | 'agentStatusByPaneKey'
-  | 'paneForegroundAgentByPaneKey'
->
-
-// Why three sources: Orca-launched tabs, hook-reported agents (SSH too), and a typed `codex` seen locally.
-function hasCodexTerminal(state: CodexNoticeState): boolean {
+// Why no hydration check: the seen flag defaults to true until the persisted value arrives.
+function isNoticeDue(state: AppState): boolean {
   return (
-    Object.values(state.tabsByWorktree).some((tabs) =>
-      tabs.some((tab) => tab.launchAgent === 'codex')
-    ) ||
-    Object.values(state.agentStatusByPaneKey).some((entry) => entry.agentType === 'codex') ||
-    Object.values(state.paneForegroundAgentByPaneKey).some((entry) => entry.agent === 'codex')
-  )
-}
-
-export function shouldShowCodexTerminalServerIsolationNotice(state: CodexNoticeState): boolean {
-  return (
-    state.persistedUIReady &&
     !state.codexTerminalServerIsolationNoticeSeen &&
     state.settings !== null &&
     // Why: a user who already opted out needs no announcement of the default.
-    isCodexTerminalServerIsolationEnabled(state.settings) &&
-    hasCodexTerminal(state)
-  )
-}
-
-function didNoticeInputsChange(state: CodexNoticeState, previous: CodexNoticeState): boolean {
-  return (
-    state.persistedUIReady !== previous.persistedUIReady ||
-    state.settings !== previous.settings ||
-    state.tabsByWorktree !== previous.tabsByWorktree ||
-    state.agentStatusByPaneKey !== previous.agentStatusByPaneKey ||
-    state.paneForegroundAgentByPaneKey !== previous.paneForegroundAgentByPaneKey
+    isCodexTerminalServerIsolationEnabled(state.settings)
   )
 }
 
@@ -93,27 +62,13 @@ function showCodexTerminalServerIsolationNotice(): void {
 }
 
 export function useCodexTerminalServerIsolationNotice(): void {
-  const seen = useAppStore((s) => s.codexTerminalServerIsolationNoticeSeen)
+  const due = useAppStore(isNoticeDue)
 
   useEffect(() => {
     // Why: a paired web client's terminals follow the host's setting, not this window's.
-    if (seen || isPairedWebClientWindow()) {
+    if (!due || isPairedWebClientWindow()) {
       return
     }
-    if (shouldShowCodexTerminalServerIsolationNotice(useAppStore.getState())) {
-      showCodexTerminalServerIsolationNotice()
-      return
-    }
-    // Why a filtered subscription: a selector would rescan every tab on each store write.
-    const unsubscribe = useAppStore.subscribe((state, previous) => {
-      if (
-        didNoticeInputsChange(state, previous) &&
-        shouldShowCodexTerminalServerIsolationNotice(state)
-      ) {
-        unsubscribe()
-        showCodexTerminalServerIsolationNotice()
-      }
-    })
-    return unsubscribe
-  }, [seen])
+    return whenCodexTerminalAppears(showCodexTerminalServerIsolationNotice)
+  }, [due])
 }
diff --git a/src/renderer/src/i18n/locales/en.json b/src/renderer/src/i18n/locales/en.json
index 7b497327dac..cb7b6f4607f 100644
--- a/src/renderer/src/i18n/locales/en.json
+++ b/src/renderer/src/i18n/locales/en.json
@@ -18755,6 +18755,10 @@
       "description": "This makes agent status more reliable. You can turn it back on in Settings.",
       "openSettings": "Open Settings"
     },
+    "codexSharedSettingsNotice": {
+      "title": "Codex in Orca now uses ~/.codex",
+      "description": "Codex may ask again to trust folders or approve commands. Re-add any MCP servers you added only in Orca."
+    },
     "codexSharedServerBanner": {
       "title": "This Codex is sharing a server with your other Codex tabs",
       "body": "Sessions may end unexpectedly, and agent status may be wrong.",
diff --git a/src/renderer/src/store/slices/ui-notice-dismissals.test.ts b/src/renderer/src/store/slices/ui-notice-dismissals.test.ts
index 180f96e427a..a69a18999c5 100644
--- a/src/renderer/src/store/slices/ui-notice-dismissals.test.ts
+++ b/src/renderer/src/store/slices/ui-notice-dismissals.test.ts
@@ -251,6 +251,19 @@ describe('createUISlice browser import hint dismissal', () => {
   })
 })
 
+describe('createUISlice Codex shared-settings notice', () => {
+  it('counts as seen until hydration, then follows the persisted flag', () => {
+    const store = createUIStore()
+    expect(store.getState().codexSharedSettingsNoticeSeen).toBe(true)
+
+    store.getState().hydratePersistedUI(makePersistedUI({}))
+    expect(store.getState().codexSharedSettingsNoticeSeen).toBe(false)
+
+    store.getState().hydratePersistedUI(makePersistedUI({ codexSharedSettingsNoticeSeen: true }))
+    expect(store.getState().codexSharedSettingsNoticeSeen).toBe(true)
+  })
+})
+
 describe('createUISlice clearOsc52ClipboardDefaultOnNotice', () => {
   it('restores the armed notice from persisted UI', () => {
     const store = createUIStore()
diff --git a/src/renderer/src/store/slices/ui/ui-slice-contract-contextual.ts b/src/renderer/src/store/slices/ui/ui-slice-contract-contextual.ts
index f964d6e048a..6ec88e1e4f3 100644
--- a/src/renderer/src/store/slices/ui/ui-slice-contract-contextual.ts
+++ b/src/renderer/src/store/slices/ui/ui-slice-contract-contextual.ts
@@ -116,4 +116,6 @@ export type UISliceContextual = {
   dismissUsageEmptyState: () => void
   codexTerminalServerIsolationNoticeSeen: boolean
   markCodexTerminalServerIsolationNoticeSeen: () => void
+  codexSharedSettingsNoticeSeen: boolean
+  markCodexSharedSettingsNoticeSeen: () => void
 }
diff --git a/src/renderer/src/store/slices/ui/ui-slice-hydration-actions.ts b/src/renderer/src/store/slices/ui/ui-slice-hydration-actions.ts
index 74f45118b09..dea5b0c2e80 100644
--- a/src/renderer/src/store/slices/ui/ui-slice-hydration-actions.ts
+++ b/src/renderer/src/store/slices/ui/ui-slice-hydration-actions.ts
@@ -244,6 +244,7 @@ export function createUiHydrationActions(set: UISliceSet, _get: UISliceGet): Par
           usageEmptyStateDismissed: ui.usageEmptyStateDismissed === true,
           codexTerminalServerIsolationNoticeSeen:
             ui.codexTerminalServerIsolationNoticeSeen === true,
+          codexSharedSettingsNoticeSeen: ui.codexSharedSettingsNoticeSeen === true,
           ...hydrateAgentReadState(ui),
           workspaceCleanupDismissals: sanitizeWorkspaceCleanupDismissals(
             ui.workspaceCleanup?.dismissals
diff --git a/src/renderer/src/store/slices/ui/ui-slice-trust-actions.ts b/src/renderer/src/store/slices/ui/ui-slice-trust-actions.ts
index dabf69bb29d..1e1c25573a2 100644
--- a/src/renderer/src/store/slices/ui/ui-slice-trust-actions.ts
+++ b/src/renderer/src/store/slices/ui/ui-slice-trust-actions.ts
@@ -148,6 +148,15 @@ export function createUiTrustActions(set: UISliceSet, _get: UISliceGet): Partial
         }
         window.api.ui.set({ codexTerminalServerIsolationNoticeSeen: true }).catch(console.error)
         return { codexTerminalServerIsolationNoticeSeen: true }
+      }),
+    codexSharedSettingsNoticeSeen: true,
+    markCodexSharedSettingsNoticeSeen: () =>
+      set((s) => {
+        if (s.codexSharedSettingsNoticeSeen) {
+          return s
+        }
+        window.api.ui.set({ codexSharedSettingsNoticeSeen: true }).catch(console.error)
+        return { codexSharedSettingsNoticeSeen: true }
       })
   }
 }
diff --git a/src/shared/persisted-ui-state-types.ts b/src/shared/persisted-ui-state-types.ts
index feb9a29d213..6eaa295eed4 100644
--- a/src/shared/persisted-ui-state-types.ts
+++ b/src/shared/persisted-ui-state-types.ts
@@ -172,6 +172,8 @@ export type PersistedUIState = {
   usageEmptyStateDismissed?: boolean
   /** One-shot toast announcing per-terminal Codex servers; set when shown, so absent means not yet seen. */
   codexTerminalServerIsolationNoticeSeen?: boolean
+  /** Windows one-shot toast for Codex moving onto ~/.codex; set when shown, so absent means not yet seen. */
+  codexSharedSettingsNoticeSeen?: boolean
   /** URL for new browser tabs; null = blank tab. */
   browserDefaultUrl?: string | null
   browserDefaultSearchEngine?: 'google' | 'duckduckgo' | 'bing' | 'kagi' | null
diff --git a/src/shared/rpc-contract/client-ui-params.ts b/src/shared/rpc-contract/client-ui-params.ts
index a039594604f..0295247a2e8 100644
--- a/src/shared/rpc-contract/client-ui-params.ts
+++ b/src/shared/rpc-contract/client-ui-params.ts
@@ -239,6 +239,7 @@ export const UiUpdateFields = z
     usagePercentageDisplayChangeNoticeDismissed: z.boolean().optional(),
     usageEmptyStateDismissed: z.boolean().optional(),
     codexTerminalServerIsolationNoticeSeen: z.boolean().optional(),
+    codexSharedSettingsNoticeSeen: z.boolean().optional(),
     petVisible: z.boolean().optional(),
     petId: z.string().optional(),
     customPets: UnknownRecordArray.optional(),