diff --git a/packages/ui/src/components/layout/Header.tsx b/packages/ui/src/components/layout/Header.tsx
index 3d99604b..82f3b5c1 100644
--- a/packages/ui/src/components/layout/Header.tsx
+++ b/packages/ui/src/components/layout/Header.tsx
@@ -49,6 +49,7 @@ import type { SessionContextUsage } from '@/stores/types/sessionTypes';
import { DesktopHostSwitcherDialog } from '@/components/desktop/DesktopHostSwitcher';
import { OpenInAppButton } from '@/components/desktop/OpenInAppButton';
import { SessionSwitcherDropdown } from '@/components/session/SessionSwitcherDropdown';
+import { SessionTabsStrip } from './SessionTabsStrip';
import { canUseElectronDesktopIPC, invokeDesktop, isDesktopLocalOriginActive, isDesktopShell, isVSCodeRuntime, startDesktopWindowDrag, type UpdateInfo } from '@/lib/desktop';
import { desktopHostsGet, redactSensitiveUrl } from '@/lib/desktopHosts';
import {
@@ -1572,7 +1573,7 @@ export const Header: React.FC = () => {
) : null}
- ) : (
+ ) : isVSCode ? (
{!isSidebarOpen ? (
@@ -1585,6 +1586,154 @@ export const Header: React.FC = () => {
) : null}
+
+ {isRenamingHeaderSession ? (
+
+ ) : (
+
+ {isNewSessionDraftOpen ? t('sessions.switcher.draftTitle') : currentSessionTitle}
+
+ )}
+ {showHeaderMetaRow ? (
+
+ {activeProjectLabel ? {activeProjectLabel} : null}
+ {currentBranchLabel ? (
+
+
+ {currentBranchLabel}
+
+ ) : null}
+ {!isNewSessionDraftOpen && worktreeBadgeKind ? (
+
+
+ {worktreeBadge}
+
+ ) : null}
+
+ ) : null}
+
+
+ {currentSessionId && !isNewSessionDraftOpen && !isRenamingHeaderSession ? (
+ {
+ if (!open && pendingHeaderRenameRef.current) {
+ pendingHeaderRenameRef.current = false;
+ beginHeaderSessionRename();
+ }
+ }}
+ >
+
+
+
+
+ { pendingHeaderRenameRef.current = true; }}>{t('sessions.sidebar.session.menu.rename')}
+ {t('sessions.sidebar.session.menu.copyId')}
+
+ {currentSession?.shareUrl ? (
+ <>
+ {t('sessions.sidebar.session.menu.copyLink')}
+ void unshareCurrentSession()}>{t('sessions.sidebar.session.menu.unshare')}
+ >
+ ) : (
+ void shareCurrentSession()}>{t('sessions.sidebar.session.menu.share')}
+ )}
+ void exportCurrentSession()}>{t('sessions.sidebar.session.menu.exportMarkdown')}
+ {!isVSCode && !isChatContext && currentSession && !currentSession.parentId ? (
+
+
+
+
+
+ {t('sessions.sidebar.session.menu.moveToWorktree')}
+
+
+
+
+ {isCurrentSessionMovingToWorktree
+ ? t('sessions.sidebar.session.moveToWorktree.tooltipMoving')
+ : isCurrentSessionActive
+ ? t('sessions.sidebar.session.moveToWorktree.tooltipBusy')
+ : t('sessions.sidebar.session.moveToWorktree.tooltip')}
+
+
+ ) : null}
+
+ setPendingHeaderRetentionAction('archive')}>{t('sessions.sidebar.bulkActions.archive')}
+ setPendingHeaderRetentionAction('delete')}>{t('sessions.sidebar.bulkActions.delete')}
+
+
+ ) : null}
+
+
+ ) : (
+
+ {!isSidebarOpen ? (
+
+
+
+ ) : null}
+
{isRenamingHeaderSession ? (
+
)}
diff --git a/packages/ui/src/components/layout/SessionTabsStrip.tsx b/packages/ui/src/components/layout/SessionTabsStrip.tsx
new file mode 100644
index 00000000..18e7528f
--- /dev/null
+++ b/packages/ui/src/components/layout/SessionTabsStrip.tsx
@@ -0,0 +1,326 @@
+import React from 'react';
+import {
+ DndContext,
+ MouseSensor,
+ TouchSensor,
+ closestCenter,
+ useSensor,
+ useSensors,
+ type DragEndEvent,
+ type Modifier,
+} from '@dnd-kit/core';
+import {
+ SortableContext,
+ horizontalListSortingStrategy,
+ useSortable,
+} from '@dnd-kit/sortable';
+import { CSS as DndCSS } from '@dnd-kit/utilities';
+import type { Session } from '@opencode-ai/sdk/v2';
+
+import {
+ DropdownMenu,
+ DropdownMenuContent,
+ DropdownMenuItem,
+ DropdownMenuSeparator,
+ DropdownMenuTrigger,
+} from '@/components/ui/dropdown-menu';
+import { Icon } from '@/components/icon/Icon';
+import { cn } from '@/lib/utils';
+import { useI18n } from '@/lib/i18n';
+import { copyTextToClipboard } from '@/lib/clipboard';
+import { useSessionTabsStore } from '@/stores/useSessionTabsStore';
+import { useGlobalSessionsStore, resolveGlobalSessionDirectory } from '@/stores/useGlobalSessionsStore';
+import { useSessionUIStore } from '@/sync/session-ui-store';
+
+const restrictToXAxis: Modifier = ({ transform }) => ({ ...transform, y: 0 });
+
+/**
+ * Sortable shell for the active tab: the pill itself drags, while the
+ * interactive content inside (rename form, menu) stops pointer-down so a text
+ * selection or menu click never starts a drag.
+ */
+const ActiveTabShell: React.FC<{ id: string; children: React.ReactNode }> = ({ id, children }) => {
+ const { attributes, listeners, setNodeRef, transform, transition, isDragging } = useSortable({ id });
+ return (
+
+ );
+};
+
+type SessionTab = { id: string; session: Session };
+
+/**
+ * One inactive tab: a soft pill with the session title. The "..." menu trigger
+ * has no reserved footprint — it appears at the tab's end on hover (or while
+ * its menu is open), nudging the title, mirroring the sidebar row mechanic.
+ * The reveal itself is opacity-only; the layout change is instant.
+ */
+const InactiveSessionTab: React.FC<{
+ tab: SessionTab;
+ onSelect: (tab: SessionTab) => void;
+ onClose: (id: string) => void;
+ onCloseOthers: (id: string) => void;
+}> = ({ tab, onSelect, onClose, onCloseOthers }) => {
+ const { t } = useI18n();
+ const [menuOpen, setMenuOpen] = React.useState(false);
+ const { attributes, listeners, setNodeRef, transform, transition, isDragging } = useSortable({ id: tab.id });
+
+ const title = tab.session.title?.trim() || t('sessions.sidebar.session.untitled');
+
+ return (
+
+
onSelect(tab)}
+ onKeyDown={(event) => {
+ if (event.key === 'Enter' || event.key === ' ') {
+ event.preventDefault();
+ onSelect(tab);
+ }
+ }}
+ onAuxClick={(event) => {
+ if (event.button === 1) {
+ event.preventDefault();
+ onClose(tab.id);
+ }
+ }}
+ className={cn(
+ 'group/session-tab flex h-8 max-w-[200px] cursor-pointer touch-none select-none items-center rounded-[10px] px-3',
+ 'text-muted-foreground transition-colors duration-150 hover:bg-interactive-hover/40 hover:text-foreground',
+ menuOpen && 'bg-interactive-hover/40 text-foreground',
+ )}
+ title={title}
+ >
+
+ {title}
+
+
+
+
+
+
+ onClose(tab.id)}>
+
+ {t('header.sessionTabs.closeTab')}
+
+ onCloseOthers(tab.id)}>
+
+ {t('header.sessionTabs.closeOtherTabs')}
+
+
+ void copyTextToClipboard(tab.id)}>
+
+ {t('sessions.sidebar.session.menu.copyId')}
+
+
+
+
+
+ );
+};
+
+/**
+ * The header's horizontal working set of sessions (web/desktop only).
+ *
+ * Every session the user opens joins the strip once; the tab whose session is
+ * current renders `children` — the header's existing title block with rename,
+ * meta row and the full session menu — inside a softly selected pill. Closing
+ * a tab only removes it from the strip; closing the active one activates its
+ * neighbour. Ids whose session has not loaded (or was archived/deleted) stay
+ * in the store but do not render, so a partial session list never destroys
+ * the working set.
+ */
+export const SessionTabsStrip: React.FC<{ children: React.ReactNode }> = ({ children }) => {
+ const { t } = useI18n();
+ const tabIds = useSessionTabsStore((state) => state.tabIds);
+ const ensureTab = useSessionTabsStore((state) => state.ensureTab);
+ const closeTab = useSessionTabsStore((state) => state.closeTab);
+ const closeOtherTabs = useSessionTabsStore((state) => state.closeOtherTabs);
+ const reorderTabs = useSessionTabsStore((state) => state.reorderTabs);
+
+ const currentSessionId = useSessionUIStore((state) => state.currentSessionId);
+ const setCurrentSession = useSessionUIStore((state) => state.setCurrentSession);
+ const openNewSessionDraft = useSessionUIStore((state) => state.openNewSessionDraft);
+ const activeSessions = useGlobalSessionsStore((state) => state.activeSessions);
+
+ // Opening a session anywhere (sidebar, palette, deep link) adds its tab.
+ React.useEffect(() => {
+ if (currentSessionId) ensureTab(currentSessionId);
+ }, [currentSessionId, ensureTab]);
+
+ const sessionsById = React.useMemo(() => {
+ const map = new Map();
+ for (const session of activeSessions) map.set(session.id, session);
+ return map;
+ }, [activeSessions]);
+
+ // Only tabs with a known live session render; unknown ids stay stored.
+ const tabs = React.useMemo(() => {
+ const list: SessionTab[] = [];
+ for (const id of tabIds) {
+ const session = sessionsById.get(id);
+ if (session) list.push({ id, session });
+ }
+ return list;
+ }, [tabIds, sessionsById]);
+
+ const handleSelect = React.useCallback((tab: SessionTab) => {
+ setCurrentSession(tab.id, resolveGlobalSessionDirectory(tab.session));
+ }, [setCurrentSession]);
+
+ const activateNeighbour = React.useCallback((closedId: string) => {
+ const index = tabs.findIndex((tab) => tab.id === closedId);
+ const neighbour = tabs[index + 1] ?? tabs[index - 1] ?? null;
+ if (neighbour) {
+ handleSelect(neighbour);
+ } else {
+ openNewSessionDraft();
+ }
+ }, [tabs, handleSelect, openNewSessionDraft]);
+
+ const handleClose = React.useCallback((id: string) => {
+ if (id === currentSessionId) activateNeighbour(id);
+ closeTab(id);
+ }, [activateNeighbour, closeTab, currentSessionId]);
+
+ const handleCloseOthers = React.useCallback((id: string) => {
+ closeOtherTabs(id);
+ if (currentSessionId && currentSessionId !== id) {
+ const kept = tabs.find((tab) => tab.id === id);
+ if (kept) handleSelect(kept);
+ }
+ }, [closeOtherTabs, currentSessionId, handleSelect, tabs]);
+
+ const sensors = useSensors(
+ useSensor(MouseSensor, { activationConstraint: { distance: 8 } }),
+ useSensor(TouchSensor, { activationConstraint: { delay: 200, tolerance: 6 } }),
+ );
+
+ const handleDragEnd = React.useCallback((event: DragEndEvent) => {
+ const { active, over } = event;
+ if (over && active.id !== over.id) {
+ reorderTabs(String(active.id), String(over.id));
+ }
+ }, [reorderTabs]);
+
+ // Soft fade at the edges while more tabs hide behind them.
+ const scrollRef = React.useRef(null);
+ const [edges, setEdges] = React.useState({ left: false, right: false });
+ const updateEdges = React.useCallback(() => {
+ const node = scrollRef.current;
+ if (!node) return;
+ const left = node.scrollLeft > 2;
+ const right = node.scrollLeft + node.clientWidth < node.scrollWidth - 2;
+ setEdges((prev) => (prev.left === left && prev.right === right ? prev : { left, right }));
+ }, []);
+ React.useEffect(() => {
+ updateEdges();
+ const node = scrollRef.current;
+ if (!node || !globalThis.ResizeObserver) return;
+ const observer = new ResizeObserver(updateEdges);
+ observer.observe(node);
+ return () => observer.disconnect();
+ }, [updateEdges, tabs.length]);
+
+ // Keep the active tab in view when it changes.
+ React.useEffect(() => {
+ scrollRef.current
+ ?.querySelector('[data-active-session-tab]')
+ ?.scrollIntoView({ block: 'nearest', inline: 'nearest' });
+ }, [currentSessionId]);
+
+ const maskImage = edges.left && edges.right
+ ? 'linear-gradient(to right, transparent, black 24px, black calc(100% - 24px), transparent)'
+ : edges.left
+ ? 'linear-gradient(to right, transparent, black 24px)'
+ : edges.right
+ ? 'linear-gradient(to right, black calc(100% - 24px), transparent)'
+ : undefined;
+
+ const tabIdsInOrder = React.useMemo(() => tabs.map((tab) => tab.id), [tabs]);
+
+ const renderTab = (tab: SessionTab) => {
+ if (tab.id === currentSessionId) {
+ return {children};
+ }
+ return (
+
+ );
+ };
+
+ // A brand-new draft (no session yet) shows as a transient active pill after
+ // the tabs; it becomes a real tab once the first message creates the session.
+ const showDraftPill = !currentSessionId || !tabs.some((tab) => tab.id === currentSessionId);
+
+ return (
+
+
+
+
+ {tabs.map(renderTab)}
+
+
+ {showDraftPill ? (
+
+ {children}
+
+ ) : null}
+
+
+ );
+};
diff --git a/packages/ui/src/lib/i18n/messages/de.ts b/packages/ui/src/lib/i18n/messages/de.ts
index 4f0f3bc2..44b048d4 100644
--- a/packages/ui/src/lib/i18n/messages/de.ts
+++ b/packages/ui/src/lib/i18n/messages/de.ts
@@ -419,6 +419,10 @@ export const dict = {
'sessions.sidebar.activity.chatsEmpty': 'Noch keine Chats.',
'chat.chatInput.chooseProject': 'Projekt auswählen',
'sessions.switcher.openAria': 'Sitzungswechsler öffnen',
+ 'header.sessionTabs.stripAria': 'Offene Sitzungen',
+ 'header.sessionTabs.tabMenuAria': 'Aktionen für den Sitzungs-Tab',
+ 'header.sessionTabs.closeTab': 'Tab schließen',
+ 'header.sessionTabs.closeOtherTabs': 'Andere Tabs schließen',
'sessions.switcher.empty': 'Keine kürzlichen Sitzungen',
'sessions.switcher.draftTitle': 'Neue Sitzung',
'sessions.sidebar.updateCheck.errorTitle': 'Fehler beim Prüfen auf Aktualisierungen',
diff --git a/packages/ui/src/lib/i18n/messages/en.ts b/packages/ui/src/lib/i18n/messages/en.ts
index fc9a2717..a4840295 100644
--- a/packages/ui/src/lib/i18n/messages/en.ts
+++ b/packages/ui/src/lib/i18n/messages/en.ts
@@ -481,6 +481,10 @@ export const dict = {
'sessions.archivePage.deleteSessionAria': 'Delete {title}',
'sessions.archivePage.restoreSessionAria': 'Restore {title}',
'sessions.switcher.openAria': 'Open session switcher',
+ 'header.sessionTabs.stripAria': 'Open sessions',
+ 'header.sessionTabs.tabMenuAria': 'Session tab actions',
+ 'header.sessionTabs.closeTab': 'Close tab',
+ 'header.sessionTabs.closeOtherTabs': 'Close other tabs',
'sessions.switcher.empty': 'No recent sessions',
'sessions.switcher.draftTitle': 'New session',
'sessions.sidebar.updateCheck.errorTitle': 'Failed to check for updates',
diff --git a/packages/ui/src/lib/i18n/messages/es.ts b/packages/ui/src/lib/i18n/messages/es.ts
index 17fec35e..1f6b829e 100644
--- a/packages/ui/src/lib/i18n/messages/es.ts
+++ b/packages/ui/src/lib/i18n/messages/es.ts
@@ -482,6 +482,10 @@ export const dict: Record = {
"sessions.archivePage.deleteSessionAria": "Eliminar {title}",
"sessions.archivePage.restoreSessionAria": "Restaurar {title}",
"sessions.switcher.openAria": "Abrir selector de sesiones",
+ "header.sessionTabs.stripAria": "Sesiones abiertas",
+ "header.sessionTabs.tabMenuAria": "Acciones de la pestaña de sesión",
+ "header.sessionTabs.closeTab": "Cerrar pestaña",
+ "header.sessionTabs.closeOtherTabs": "Cerrar las demás pestañas",
"sessions.switcher.empty": "No hay sesiones recientes",
"sessions.switcher.draftTitle": "Nueva sesión",
"sessions.sidebar.updateCheck.errorTitle": "No se pudo comprobar actualizaciones",
diff --git a/packages/ui/src/lib/i18n/messages/fr.ts b/packages/ui/src/lib/i18n/messages/fr.ts
index 0cf10e61..1b8ccd3a 100644
--- a/packages/ui/src/lib/i18n/messages/fr.ts
+++ b/packages/ui/src/lib/i18n/messages/fr.ts
@@ -312,6 +312,10 @@ export const dict = {
'sessions.archivePage.deleteSessionAria': 'Supprimer {title}',
'sessions.archivePage.restoreSessionAria': 'Restaurer {title}',
'sessions.switcher.openAria': 'Sélecteur de session ouvert',
+ 'header.sessionTabs.stripAria': 'Sessions ouvertes',
+ 'header.sessionTabs.tabMenuAria': 'Actions de l\'onglet de session',
+ 'header.sessionTabs.closeTab': 'Fermer l\'onglet',
+ 'header.sessionTabs.closeOtherTabs': 'Fermer les autres onglets',
'sessions.switcher.empty': 'Aucune session récente',
'sessions.switcher.draftTitle': 'Nouvelle session',
'sessions.sidebar.updateCheck.errorTitle': 'Échec de la vérification des mises à jour',
diff --git a/packages/ui/src/lib/i18n/messages/ja.ts b/packages/ui/src/lib/i18n/messages/ja.ts
index 5796a5b0..fe7f1868 100644
--- a/packages/ui/src/lib/i18n/messages/ja.ts
+++ b/packages/ui/src/lib/i18n/messages/ja.ts
@@ -482,6 +482,10 @@ export const dict: Record = {
'sessions.archivePage.deleteSessionAria': '{title} を削除',
'sessions.archivePage.restoreSessionAria': '{title} を復元',
'sessions.switcher.openAria': 'セッションスイッチャーを開く',
+ 'header.sessionTabs.stripAria': '開いているセッション',
+ 'header.sessionTabs.tabMenuAria': 'セッションタブの操作',
+ 'header.sessionTabs.closeTab': 'タブを閉じる',
+ 'header.sessionTabs.closeOtherTabs': '他のタブを閉じる',
'sessions.switcher.empty': '最近のセッションはありません',
'sessions.switcher.draftTitle': '新しいセッション',
'sessions.sidebar.updateCheck.errorTitle': '更新の確認に失敗しました',
diff --git a/packages/ui/src/lib/i18n/messages/ko.ts b/packages/ui/src/lib/i18n/messages/ko.ts
index 80d4f60e..a2b73918 100644
--- a/packages/ui/src/lib/i18n/messages/ko.ts
+++ b/packages/ui/src/lib/i18n/messages/ko.ts
@@ -482,6 +482,10 @@ export const dict: Record = {
'sessions.archivePage.deleteSessionAria': '{title} 삭제',
'sessions.archivePage.restoreSessionAria': '{title} 복원',
'sessions.switcher.openAria': '세션 전환기 열기',
+ 'header.sessionTabs.stripAria': '열린 세션',
+ 'header.sessionTabs.tabMenuAria': '세션 탭 작업',
+ 'header.sessionTabs.closeTab': '탭 닫기',
+ 'header.sessionTabs.closeOtherTabs': '다른 탭 닫기',
'sessions.switcher.empty': '최근 세션 없음',
'sessions.switcher.draftTitle': '새 세션',
'sessions.sidebar.updateCheck.errorTitle': '업데이트 확인 실패',
diff --git a/packages/ui/src/lib/i18n/messages/pl.ts b/packages/ui/src/lib/i18n/messages/pl.ts
index c29a1dfa..2f3ef7b6 100644
--- a/packages/ui/src/lib/i18n/messages/pl.ts
+++ b/packages/ui/src/lib/i18n/messages/pl.ts
@@ -293,6 +293,10 @@ export const dict: Record = {
'sessions.archivePage.deleteSessionAria': 'Usuń {title}',
'sessions.archivePage.restoreSessionAria': 'Przywróć {title}',
'sessions.switcher.openAria': 'Otwórz przełącznik sesji',
+ 'header.sessionTabs.stripAria': 'Otwarte sesje',
+ 'header.sessionTabs.tabMenuAria': 'Akcje karty sesji',
+ 'header.sessionTabs.closeTab': 'Zamknij kartę',
+ 'header.sessionTabs.closeOtherTabs': 'Zamknij pozostałe karty',
'sessions.switcher.empty': 'Brak ostatnich sesji',
'sessions.switcher.draftTitle': 'Nowa sesja',
'sessions.sidebar.updateCheck.errorTitle': 'Nie udało się sprawdzić aktualizacji',
diff --git a/packages/ui/src/lib/i18n/messages/pt-BR.ts b/packages/ui/src/lib/i18n/messages/pt-BR.ts
index 5e988ce3..2723fd6e 100644
--- a/packages/ui/src/lib/i18n/messages/pt-BR.ts
+++ b/packages/ui/src/lib/i18n/messages/pt-BR.ts
@@ -482,6 +482,10 @@ export const dict: Record = {
"sessions.archivePage.deleteSessionAria": "Excluir {title}",
"sessions.archivePage.restoreSessionAria": "Restaurar {title}",
"sessions.switcher.openAria": "Abrir seletor de sessões",
+ "header.sessionTabs.stripAria": "Sessões abertas",
+ "header.sessionTabs.tabMenuAria": "Ações da aba de sessão",
+ "header.sessionTabs.closeTab": "Fechar aba",
+ "header.sessionTabs.closeOtherTabs": "Fechar outras abas",
"sessions.switcher.empty": "Nenhuma sessão recente",
"sessions.switcher.draftTitle": "Nova sessão",
"sessions.sidebar.updateCheck.errorTitle": "Não foi possível verificar atualizações",
diff --git a/packages/ui/src/lib/i18n/messages/uk.ts b/packages/ui/src/lib/i18n/messages/uk.ts
index 1f10374f..90c85f21 100644
--- a/packages/ui/src/lib/i18n/messages/uk.ts
+++ b/packages/ui/src/lib/i18n/messages/uk.ts
@@ -482,6 +482,10 @@ export const dict: Record = {
"sessions.archivePage.deleteSessionAria": "Видалити {title}",
"sessions.archivePage.restoreSessionAria": "Відновити {title}",
"sessions.switcher.openAria": "Відкрити перемикач сесій",
+ "header.sessionTabs.stripAria": "Відкриті сесії",
+ "header.sessionTabs.tabMenuAria": "Дії вкладки сесії",
+ "header.sessionTabs.closeTab": "Закрити вкладку",
+ "header.sessionTabs.closeOtherTabs": "Закрити інші вкладки",
"sessions.switcher.empty": "Немає недавніх сесій",
"sessions.switcher.draftTitle": "Нова сесія",
"sessions.sidebar.updateCheck.errorTitle": "Не вдалося перейти на наявність оновлень",
diff --git a/packages/ui/src/lib/i18n/messages/zh-CN.ts b/packages/ui/src/lib/i18n/messages/zh-CN.ts
index 2b0c7263..007a243b 100644
--- a/packages/ui/src/lib/i18n/messages/zh-CN.ts
+++ b/packages/ui/src/lib/i18n/messages/zh-CN.ts
@@ -482,6 +482,10 @@ export const dict: Record = {
'sessions.archivePage.deleteSessionAria': '删除 {title}',
'sessions.archivePage.restoreSessionAria': '还原 {title}',
'sessions.switcher.openAria': '打开会话切换器',
+ 'header.sessionTabs.stripAria': '打开的会话',
+ 'header.sessionTabs.tabMenuAria': '会话标签页操作',
+ 'header.sessionTabs.closeTab': '关闭标签页',
+ 'header.sessionTabs.closeOtherTabs': '关闭其他标签页',
'sessions.switcher.empty': '没有最近会话',
'sessions.switcher.draftTitle': '新会话',
'sessions.sidebar.updateCheck.errorTitle': '检查更新失败',
diff --git a/packages/ui/src/lib/i18n/messages/zh-TW.ts b/packages/ui/src/lib/i18n/messages/zh-TW.ts
index 842450c1..1e4750e3 100644
--- a/packages/ui/src/lib/i18n/messages/zh-TW.ts
+++ b/packages/ui/src/lib/i18n/messages/zh-TW.ts
@@ -495,6 +495,10 @@ export const dict: Record = {
'sessions.archivePage.deleteSessionAria': '刪除 {title}',
'sessions.archivePage.restoreSessionAria': '還原 {title}',
'sessions.switcher.openAria': '開啟會話切換器',
+ 'header.sessionTabs.stripAria': '開啟的會話',
+ 'header.sessionTabs.tabMenuAria': '工作階段分頁動作',
+ 'header.sessionTabs.closeTab': '關閉分頁',
+ 'header.sessionTabs.closeOtherTabs': '關閉其他分頁',
'sessions.switcher.empty': '沒有最近會話',
'sessions.switcher.draftTitle': '新會話',
'sessions.sidebar.updateCheck.errorTitle': '檢查更新失敗',
diff --git a/packages/ui/src/stores/useSessionTabsStore.test.ts b/packages/ui/src/stores/useSessionTabsStore.test.ts
new file mode 100644
index 00000000..5e9d9547
--- /dev/null
+++ b/packages/ui/src/stores/useSessionTabsStore.test.ts
@@ -0,0 +1,43 @@
+import { beforeEach, describe, expect, test } from 'bun:test';
+
+import { useSessionTabsStore } from './useSessionTabsStore';
+
+describe('useSessionTabsStore', () => {
+ beforeEach(() => {
+ useSessionTabsStore.setState({ tabIds: [] });
+ });
+
+ test('ensureTab appends once and preserves order', () => {
+ const store = useSessionTabsStore.getState();
+ store.ensureTab('a');
+ store.ensureTab('b');
+ store.ensureTab('a');
+ expect(useSessionTabsStore.getState().tabIds).toEqual(['a', 'b']);
+ });
+
+ test('closeTab removes only the given id; closeOtherTabs keeps only it', () => {
+ useSessionTabsStore.setState({ tabIds: ['a', 'b', 'c'] });
+ useSessionTabsStore.getState().closeTab('b');
+ expect(useSessionTabsStore.getState().tabIds).toEqual(['a', 'c']);
+ useSessionTabsStore.getState().closeOtherTabs('c');
+ expect(useSessionTabsStore.getState().tabIds).toEqual(['c']);
+ });
+
+ test('reorderTabs moves by id and ignores unknown ids', () => {
+ useSessionTabsStore.setState({ tabIds: ['a', 'b', 'c'] });
+ useSessionTabsStore.getState().reorderTabs('c', 'a');
+ expect(useSessionTabsStore.getState().tabIds).toEqual(['c', 'a', 'b']);
+ const before = useSessionTabsStore.getState().tabIds;
+ useSessionTabsStore.getState().reorderTabs('x', 'a');
+ expect(useSessionTabsStore.getState().tabIds).toBe(before);
+ });
+
+ test('removeTabs drops only confirmed-gone ids and no-ops otherwise', () => {
+ useSessionTabsStore.setState({ tabIds: ['a', 'b'] });
+ const before = useSessionTabsStore.getState().tabIds;
+ useSessionTabsStore.getState().removeTabs(['x']);
+ expect(useSessionTabsStore.getState().tabIds).toBe(before);
+ useSessionTabsStore.getState().removeTabs(['a']);
+ expect(useSessionTabsStore.getState().tabIds).toEqual(['b']);
+ });
+});
diff --git a/packages/ui/src/stores/useSessionTabsStore.ts b/packages/ui/src/stores/useSessionTabsStore.ts
new file mode 100644
index 00000000..b2c6b3d2
--- /dev/null
+++ b/packages/ui/src/stores/useSessionTabsStore.ts
@@ -0,0 +1,81 @@
+import { create } from 'zustand';
+import { devtools, persist } from 'zustand/middleware';
+
+import { createDeferredSafeJSONStorage } from '@/stores/utils/safeStorage';
+
+/**
+ * The header's working set of sessions, shown as tabs on web/desktop.
+ *
+ * Only session ids and their order are owned here — titles, directories and
+ * liveness come from the session stores at render time. Tabs are a per-client
+ * projection: opening a session anywhere adds it once, closing a tab only
+ * removes it from the strip and never touches the session itself. Ids whose
+ * session is unknown are kept (a partially loaded global list must not
+ * destroy the working set) and simply do not render until the session loads.
+ */
+interface SessionTabsStore {
+ tabIds: string[];
+
+ ensureTab: (sessionId: string) => void;
+ closeTab: (sessionId: string) => void;
+ closeOtherTabs: (sessionId: string) => void;
+ reorderTabs: (activeId: string, overId: string) => void;
+ /** Drop ids the caller has authoritatively confirmed no longer exist. */
+ removeTabs: (sessionIds: readonly string[]) => void;
+}
+
+type PersistedSessionTabs = { tabIds: string[] };
+
+export const useSessionTabsStore = create()(
+ devtools(
+ persist(
+ (set, get) => ({
+ tabIds: [],
+
+ ensureTab: (sessionId) => {
+ if (!sessionId) return;
+ const { tabIds } = get();
+ if (tabIds.includes(sessionId)) return;
+ set({ tabIds: [...tabIds, sessionId] });
+ },
+
+ closeTab: (sessionId) => {
+ const { tabIds } = get();
+ if (!tabIds.includes(sessionId)) return;
+ set({ tabIds: tabIds.filter((id) => id !== sessionId) });
+ },
+
+ closeOtherTabs: (sessionId) => {
+ const { tabIds } = get();
+ if (!tabIds.includes(sessionId)) return;
+ if (tabIds.length === 1) return;
+ set({ tabIds: [sessionId] });
+ },
+
+ reorderTabs: (activeId, overId) => {
+ const { tabIds } = get();
+ const from = tabIds.indexOf(activeId);
+ const to = tabIds.indexOf(overId);
+ if (from < 0 || to < 0 || from === to) return;
+ const next = [...tabIds];
+ next.splice(to, 0, ...next.splice(from, 1));
+ set({ tabIds: next });
+ },
+
+ removeTabs: (sessionIds) => {
+ if (sessionIds.length === 0) return;
+ const gone = new Set(sessionIds);
+ const { tabIds } = get();
+ const next = tabIds.filter((id) => !gone.has(id));
+ if (next.length === tabIds.length) return;
+ set({ tabIds: next });
+ },
+ }),
+ {
+ name: 'session-tabs-store',
+ storage: createDeferredSafeJSONStorage(),
+ partialize: (state) => ({ tabIds: state.tabIds }),
+ },
+ ),
+ ),
+);