feat(web): configure Codex exploration collapse

Default Codex exploration groups to collapsed and expose a persisted chat setting for users who prefer them expanded.\n\nvia [HAPI](https://hapi.run)\n\nCo-Authored-By: HAPI <noreply@hapi.run>

web/src/chat/toolGroups.test.ts

@@ -170,7 +170,7 @@ describe('Codex activity headings', () => {
 })
 
 describe('buildVisibleChatBlocks', () => {
-    it('renders one or more structured Codex exploration commands as an open exploration group', () => {
+    it('renders one or more structured Codex exploration commands as a collapsed exploration group', () => {
         const read = makeToolBlock('codex-read', 'CodexBash', {
             command: 'cat package.json',
             command_source: 'agent',
@@ -198,10 +198,25 @@ describe('buildVisibleChatBlocks', () => {
         expect(isToolGroupBlock(visible[0])).toBe(true)
         if (!isToolGroupBlock(visible[0])) throw new Error('expected exploration group')
         expect(visible[0].presentationMode).toBe('codex-exploration')
-        expect(visible[0].defaultOpen).toBe(true)
+        expect(visible[0].defaultOpen).toBe(false)
         expect(visible[0].tools.map((tool) => tool.id)).toEqual(['codex-read', 'codex-search'])
     })
 
+    it('opens exploration groups when the collapse preference is disabled', () => {
+        const visible = buildVisibleChatBlocks([
+            makeToolBlock('codex-read', 'CodexBash', {
+                command: 'cat package.json',
+                command_actions: [{ type: 'read', command: 'cat package.json', name: 'package.json', path: '/repo/package.json' }]
+            }),
+            makeToolBlock('codex-search', 'CodexBash', {
+                command: 'rg nativeTitle web/src',
+                command_actions: [{ type: 'search', command: 'rg nativeTitle web/src', query: 'nativeTitle' }]
+            })
+        ], { hasMoreMessages: false, codexExplorationCollapsed: false })
+
+        expect(isToolGroupBlock(visible[0]) && visible[0].defaultOpen).toBe(true)
+    })
+
     it('keeps structured general Codex commands separate from exploration groups', () => {
         const read = makeToolBlock('codex-read', 'CodexBash', {
             command: 'cat package.json',

web/src/chat/toolGroups.ts

@@ -55,6 +55,7 @@ export function visibleBlockRole(block: VisibleChatBlock): VisibleChatBlockRole
 type ToolGroupingOptions = {
     hasMoreMessages: boolean
     previousGroups?: ToolGroupBlock[]
+    codexExplorationCollapsed?: boolean
 }
 
 const PLAN_TOOL_NAMES = new Set([
@@ -305,7 +306,7 @@ export function buildVisibleChatBlocks(
             firstToolId: tools[0].id,
             lastToolId: tools[tools.length - 1].id,
             tools,
-            defaultOpen: groupingFamily === 'codex-exploration',
+            defaultOpen: groupingFamily === 'codex-exploration' && options.codexExplorationCollapsed === false,
             historyState: needsOlderHistory ? 'needs-older-history' : 'complete',
             needsOlderHistory,
             activityTitle,

web/src/components/SessionChat.tsx

@@ -21,6 +21,7 @@ import { reconcileChatBlocks } from '@/chat/reconcile'
 import { buildConversationOutline } from '@/chat/outline'
 import { buildVisibleChatBlocks, isToolGroupBlock, visibleBlockRole, type ToolGroupBlock } from '@/chat/toolGroups'
 import { useUnseenBlockCount } from '@/hooks/useUnseenBlockCount'
+import { useCodexExplorationCollapse } from '@/hooks/useCodexExplorationCollapse'
 import { isQueuedForInvocation } from '@/lib/messages'
 import { inactiveSessionCanResume } from '@/lib/sessionResume'
 import {
@@ -480,6 +481,7 @@ export function SessionChat(props: SessionChatProps) {
 function SessionChatInner(props: SessionChatProps) {
     const { haptic } = usePlatform()
     const { t } = useTranslation()
+    const { codexExplorationCollapsed } = useCodexExplorationCollapse()
     const navigate = useNavigate()
     const [historyActionPending, setHistoryActionPending] = useState(false)
 
@@ -1164,9 +1166,10 @@ function SessionChatInner(props: SessionChatProps) {
     const visibleBlocks = useMemo(
         () => buildVisibleChatBlocks(reconciled.blocks, {
             hasMoreMessages: props.hasMoreMessages,
-            previousGroups: visibleGroupsRef.current
+            previousGroups: visibleGroupsRef.current,
+            codexExplorationCollapsed
         }),
-        [reconciled.blocks, props.hasMoreMessages]
+        [reconciled.blocks, props.hasMoreMessages, codexExplorationCollapsed]
     )
 
     // Fork-current must compare against assistant-ui message ids (`kind:id`),

web/src/hooks/useCodexExplorationCollapse.test.ts

@@ -0,0 +1,23 @@
+import { beforeEach, describe, expect, it } from 'vitest'
+import {
+    DEFAULT_CODEX_EXPLORATION_COLLAPSED,
+    getInitialCodexExplorationCollapsed,
+} from './useCodexExplorationCollapse'
+
+describe('useCodexExplorationCollapse helpers', () => {
+    beforeEach(() => {
+        window.localStorage.clear()
+    })
+
+    it('defaults to collapsed', () => {
+        expect(getInitialCodexExplorationCollapsed()).toBe(DEFAULT_CODEX_EXPLORATION_COLLAPSED)
+    })
+
+    it('reads valid stored values and ignores invalid values', () => {
+        window.localStorage.setItem('hapi-codex-exploration-collapsed', 'false')
+        expect(getInitialCodexExplorationCollapsed()).toBe(false)
+
+        window.localStorage.setItem('hapi-codex-exploration-collapsed', 'invalid')
+        expect(getInitialCodexExplorationCollapsed()).toBe(DEFAULT_CODEX_EXPLORATION_COLLAPSED)
+    })
+})

web/src/hooks/useCodexExplorationCollapse.ts

@@ -0,0 +1,76 @@
+import { useCallback, useEffect, useState } from 'react'
+
+export const DEFAULT_CODEX_EXPLORATION_COLLAPSED = true
+
+const CODEX_EXPLORATION_COLLAPSED_STORAGE_KEY = 'hapi-codex-exploration-collapsed'
+
+function isBrowser(): boolean {
+    return typeof window !== 'undefined' && typeof document !== 'undefined'
+}
+
+function safeGetItem(): string | null {
+    if (!isBrowser()) return null
+    try {
+        return localStorage.getItem(CODEX_EXPLORATION_COLLAPSED_STORAGE_KEY)
+    } catch {
+        return null
+    }
+}
+
+function safeSetItem(value: string): void {
+    if (!isBrowser()) return
+    try {
+        localStorage.setItem(CODEX_EXPLORATION_COLLAPSED_STORAGE_KEY, value)
+    } catch {
+        // Ignore storage errors.
+    }
+}
+
+function safeRemoveItem(): void {
+    if (!isBrowser()) return
+    try {
+        localStorage.removeItem(CODEX_EXPLORATION_COLLAPSED_STORAGE_KEY)
+    } catch {
+        // Ignore storage errors.
+    }
+}
+
+function parseCodexExplorationCollapsed(raw: string | null): boolean {
+    if (raw === 'true') return true
+    if (raw === 'false') return false
+    return DEFAULT_CODEX_EXPLORATION_COLLAPSED
+}
+
+export function getInitialCodexExplorationCollapsed(): boolean {
+    return parseCodexExplorationCollapsed(safeGetItem())
+}
+
+export function useCodexExplorationCollapse(): {
+    codexExplorationCollapsed: boolean
+    setCodexExplorationCollapsed: (value: boolean) => void
+} {
+    const [codexExplorationCollapsed, setCodexExplorationCollapsedState] = useState<boolean>(getInitialCodexExplorationCollapsed)
+
+    useEffect(() => {
+        if (!isBrowser()) return
+
+        const onStorage = (event: StorageEvent) => {
+            if (event.key !== CODEX_EXPLORATION_COLLAPSED_STORAGE_KEY) return
+            setCodexExplorationCollapsedState(parseCodexExplorationCollapsed(event.newValue))
+        }
+
+        window.addEventListener('storage', onStorage)
+        return () => window.removeEventListener('storage', onStorage)
+    }, [])
+
+    const setCodexExplorationCollapsed = useCallback((value: boolean) => {
+        setCodexExplorationCollapsedState(value)
+        if (value === DEFAULT_CODEX_EXPLORATION_COLLAPSED) {
+            safeRemoveItem()
+        } else {
+            safeSetItem(String(value))
+        }
+    }, [])
+
+    return { codexExplorationCollapsed, setCodexExplorationCollapsed }
+}

web/src/lib/locales/en.ts

@@ -752,6 +752,8 @@ export default {
   'settings.chat.terminalToolDisplay': 'Terminal Tool Cards',
   'settings.chat.terminalToolDisplay.compact': 'Compact (command only)',
   'settings.chat.terminalToolDisplay.detailed': 'Detailed (show output preview)',
+  'settings.chat.codexExplorationCollapsed': 'Collapse explored tool groups by default',
+  'settings.chat.codexExplorationCollapsed.desc': 'Keep Codex read and search activity collapsed until you open it.',
   'settings.chat.groupedToolBackground': 'Grouped Tool Use Background',
   'settings.chat.userMessageBackground': 'User Message Background',
   'settings.chat.surfaceColor.default': 'Default color',

web/src/lib/locales/zh-CN.ts

@@ -756,6 +756,8 @@ export default {
   'settings.chat.terminalToolDisplay': '终端工具卡片',
   'settings.chat.terminalToolDisplay.compact': '简洁（仅命令）',
   'settings.chat.terminalToolDisplay.detailed': '详细（显示输出预览）',
+  'settings.chat.codexExplorationCollapsed': '已探索工具组默认收起',
+  'settings.chat.codexExplorationCollapsed.desc': 'Codex 的读取和搜索活动默认收起，点击后查看详情。',
   'settings.chat.groupedToolBackground': '聚合 Tool Use 背景',
   'settings.chat.userMessageBackground': '用户消息背景',
   'settings.chat.surfaceColor.default': '默认颜色',

web/src/routes/settings/chat.tsx

@@ -1,6 +1,7 @@
 import { useTranslation } from '@/lib/use-translation'
 import { getComposerEnterBehaviorOptions, useComposerEnterBehavior } from '@/hooks/useComposerEnterBehavior'
 import { getTerminalToolDisplayModeOptions, useTerminalToolDisplayMode } from '@/hooks/useTerminalToolDisplayMode'
+import { useCodexExplorationCollapse } from '@/hooks/useCodexExplorationCollapse'
 import {
     getChatSurfaceColorPickerValue,
     getChatSurfaceColorPresetOptions,
@@ -10,7 +11,7 @@ import {
     type ChatSurfaceColorPreference,
     type ChatSurfaceColorPreset,
 } from '@/hooks/useChatSurfaceColors'
-import { SettingsChoiceGroup, SettingsFieldLabel, SettingsPageContent, SettingsSection } from '@/components/settings/SettingsPrimitives'
+import { SettingsChoiceGroup, SettingsFieldLabel, SettingsPageContent, SettingsSection, SettingsSwitch } from '@/components/settings/SettingsPrimitives'
 import { ComposerToolbarLayoutControl } from '@/components/settings/ComposerToolbarLayoutControl'
 
 function ChatSurfaceColorControl(props: {
@@ -48,6 +49,7 @@ export default function SettingsChatPage() {
     const { t } = useTranslation()
     const { composerEnterBehavior, setComposerEnterBehavior } = useComposerEnterBehavior()
     const { terminalToolDisplayMode, setTerminalToolDisplayMode } = useTerminalToolDisplayMode()
+    const { codexExplorationCollapsed, setCodexExplorationCollapsed } = useCodexExplorationCollapse()
     const { toolGroupBackground, userMessageBackground, setToolGroupBackground, setUserMessageBackground } = useChatSurfaceColors()
     return (
         <SettingsPageContent description={t('settings.chat.description')}>
@@ -67,6 +69,12 @@ export default function SettingsChatPage() {
                     options={getTerminalToolDisplayModeOptions().map((option) => ({ value: option.value, label: t(option.labelKey) }))}
                     onChange={setTerminalToolDisplayMode}
                 />
+                <SettingsSwitch
+                    label={t('settings.chat.codexExplorationCollapsed')}
+                    description={t('settings.chat.codexExplorationCollapsed.desc')}
+                    checked={codexExplorationCollapsed}
+                    onChange={setCodexExplorationCollapsed}
+                />
             </SettingsSection>
             <SettingsSection title={t('settings.chat.colors')}>
                 <ChatSurfaceColorControl label={t('settings.chat.groupedToolBackground')} preference={toolGroupBackground} onPresetChange={(preset) => setToolGroupBackground(toPresetChatSurfaceColorPreference(preset))} onCustomChange={(value) => setToolGroupBackground(toCustomChatSurfaceColorPreference(value))} />

web/src/routes/settings/index.test.tsx

@@ -10,7 +10,7 @@ import SettingsVoicePage from './voice'
 import SettingsVoiceVoicesPage from './voice-voices'
 import SettingsVoiceAdvancedPage from './voice-advanced'
 
-const { context, navigate, setAppearance, setColorTheme, setFontScale, setTerminalFontSize, setComposerEnterBehavior, setVoice } = vi.hoisted(() => ({
+const { context, navigate, setAppearance, setColorTheme, setFontScale, setTerminalFontSize, setComposerEnterBehavior, setCodexExplorationCollapsed, setVoice } = vi.hoisted(() => ({
     context: { token: '' },
     navigate: vi.fn(),
     setAppearance: vi.fn(),
@@ -18,6 +18,7 @@ const { context, navigate, setAppearance, setColorTheme, setFontScale, setTermin
     setFontScale: vi.fn(),
     setTerminalFontSize: vi.fn(),
     setComposerEnterBehavior: vi.fn(),
+    setCodexExplorationCollapsed: vi.fn(),
     setVoice: vi.fn(),
 }))
 
@@ -129,6 +130,10 @@ vi.mock('@/hooks/useTerminalToolDisplayMode', () => ({
     ],
 }))
 
+vi.mock('@/hooks/useCodexExplorationCollapse', () => ({
+    useCodexExplorationCollapse: () => ({ codexExplorationCollapsed: true, setCodexExplorationCollapsed }),
+}))
+
 vi.mock('@/hooks/useChatSurfaceColors', () => ({
     useChatSurfaceColors: () => ({
         toolGroupBackground: 'default',
@@ -261,6 +266,14 @@ describe('responsive settings pages', () => {
         expect(screen.getByText('Grouped Tool Use Background')).toBeInTheDocument()
     })
 
+    it('renders the default-collapse switch for Codex exploration groups', () => {
+        renderPage(<SettingsChatPage />)
+        const toggle = screen.getByRole('checkbox', { name: 'Collapse explored tool groups by default' })
+        expect(toggle).toBeChecked()
+        fireEvent.click(toggle)
+        expect(setCodexExplorationCollapsed).toHaveBeenCalledWith(false)
+    })
+
     it('renders About metadata on its own route page', () => {
         renderPage(<SettingsAboutPage />)
         expect(screen.queryByText('Companion')).not.toBeInTheDocument()