diff --git a/client/src/components/lanes/LaneCard.tsx b/client/src/components/lanes/LaneCard.tsx
index 588192a..9c654a1 100644
--- a/client/src/components/lanes/LaneCard.tsx
+++ b/client/src/components/lanes/LaneCard.tsx
@@ -16,7 +16,7 @@ import { useTranslation } from "react-i18next";
 import { DestructiveLaneModal } from "./DestructiveLaneModal";
 import { api } from "../../lib/api";
 import { eventBus } from "../../lib/eventBus";
-import type { Lane, LaneGitFacts, LaneRuntime } from "../../lib/types";
+import type { Lane, LaneGitFacts, LaneRuntime, NamedLock } from "../../lib/types";
 
 /** How often a mounted card re-reads its working-copy facts. Slow on purpose:
  *  each call is three git subprocesses server-side, and a branch name does not
@@ -28,6 +28,10 @@ const GIT_REFRESH_MS = 30_000;
  *  the lane poll because each call opens a socket per declared port. */
 const RUNTIME_REFRESH_MS = 10_000;
 
+/** How often a mounted card re-reads locks held by this lane. Same refresh rate
+ *  as the git facts (slow, since lock state changes infrequently). */
+const LOCKS_REFRESH_MS = 30_000;
+
 /**
  * The lane's own working copy, fetched per card rather than folded into the
  * polled lane list. Absent facts are not an error state: a lane may point at a
@@ -95,6 +99,37 @@ function useLaneRuntime(laneId: number, bump: number): LaneRuntime | null {
   return runtime;
 }
 
+/**
+ * Locks held by THIS lane, polled the same way runtime/git facts are.
+ */
+function useLaneLocks(laneSlot: number | null): NamedLock[] {
+  const [locks, setLocks] = useState<NamedLock[]>([]);
+
+  useEffect(() => {
+    if (!laneSlot) return;
+    let alive = true;
+    const holder = `lane${laneSlot}`;
+    const read = () => {
+      api.locks
+        .list()
+        .then((data) => {
+          if (alive) setLocks(data.locks.filter((l) => l.holder === holder));
+        })
+        .catch(() => {
+          /* fails silently, same contract as the git/runtime pollers */
+        });
+    };
+    read();
+    const timer = setInterval(read, LOCKS_REFRESH_MS);
+    return () => {
+      alive = false;
+      clearInterval(timer);
+    };
+  }, [laneSlot]);
+
+  return locks;
+}
+
 const LIVENESS_DOT: Record<Lane["liveness"], string> = {
   active: "bg-status-success",
   idle: "bg-surface-4",
@@ -125,6 +160,7 @@ export default function LaneCard({
   const [bootLine, setBootLine] = useState<string | null>(null);
   const git = useLaneGitFacts(lane.id);
   const runtime = useLaneRuntime(lane.id, runtimeBump);
+  const locks = useLaneLocks(lane.slot);
 
   /**
    * Boot or stop the lane's stack. Deliberately NOT routed through `onAction`:
@@ -302,6 +338,16 @@ export default function LaneCard({
           </div>
         )}
 
+        {locks.length > 0 && (
+          <div
+            className="mb-3 flex items-center gap-1 text-xs text-status-warning"
+            data-testid={`lane-locks-${lane.id}`}
+            title={locks.map((l) => `${l.name} (${Math.floor(l.ageSec / 60)}m)`).join(", ")}
+          >
+            🔒 {t("locks.held", { count: locks.length })}
+          </div>
+        )}
+
         <dl className="mb-3 space-y-1 font-mono text-[11px] text-fg-secondary">
           {git?.available && (
             <div data-testid="lane-git" className="space-y-1">
diff --git a/client/src/components/lanes/__tests__/LaneCard.test.tsx b/client/src/components/lanes/__tests__/LaneCard.test.tsx
index b7d9b12..913ca68 100644
--- a/client/src/components/lanes/__tests__/LaneCard.test.tsx
+++ b/client/src/components/lanes/__tests__/LaneCard.test.tsx
@@ -24,6 +24,9 @@ vi.mock("../../../lib/api", () => ({
       down: vi.fn(),
       preflight: vi.fn().mockResolvedValue({ blocked: [], warnings: [] }),
     },
+    locks: {
+      list: vi.fn(),
+    },
   },
 }));
 
@@ -35,6 +38,8 @@ beforeEach(() => {
   vi.mocked(api.lanes.runtime).mockReset();
   vi.mocked(api.lanes.runtime).mockResolvedValue({ available: false });
 });
+vi.mocked(api.locks.list).mockReset();
+vi.mocked(api.locks.list).mockResolvedValue({ locks: [] });
 
 function makeLane(overrides: Partial<Lane> = {}): Lane {
   return {
@@ -335,3 +340,24 @@ describe("LaneCard — the lane's own application stack", () => {
     expect(screen.getByText(/health check failed/)).toBeInTheDocument();
   });
 });
+
+describe("LaneCard — named locks", () => {
+  it("shows a lock badge when this lane holds a named lock", async () => {
+    vi.mocked(api.locks.list).mockResolvedValue({
+      locks: [{ name: "build", holder: "lane1", since: 0, ageSec: 120 }],
+    });
+    render(<LaneCard lane={makeLane({ slot: 1 })} onAction={vi.fn()} />);
+
+    expect(await screen.findByTestId("lane-locks-1")).toBeInTheDocument();
+    expect(screen.getByText(/lock/i)).toBeInTheDocument();
+  });
+
+  it("shows no lock badge when locks belong to a different lane", async () => {
+    vi.mocked(api.locks.list).mockResolvedValue({
+      locks: [{ name: "build", holder: "lane99", since: 0, ageSec: 120 }],
+    });
+    render(<LaneCard lane={makeLane({ slot: 1 })} onAction={vi.fn()} />);
+
+    expect(screen.queryByTestId("lane-locks-1")).not.toBeInTheDocument();
+  });
+});
diff --git a/client/src/i18n/locales/en/lanes.json b/client/src/i18n/locales/en/lanes.json
index 3d42e0f..aafb239 100644
--- a/client/src/i18n/locales/en/lanes.json
+++ b/client/src/i18n/locales/en/lanes.json
@@ -11,7 +11,7 @@
   "add": "Add lane",
   "addLane": "Create a lane from a working directory",
   "addLaneBaseLabel": "Branch to fork from",
-  "addLaneNoBranches": "This repo has no commits yet — the worktree will start empty.",
+  "addLaneNoBranches": "This repo has no commits yet \u2014 the worktree will start empty.",
   "addLaneNotARepo": "Not a git repository (or no read access) yet.",
   "addLaneRepoHint": "An existing git repo. The dashboard creates a new worktree for the lane, not a folder you pick.",
   "addLaneRepoLabel": "Source repository",
@@ -40,9 +40,9 @@
   "destructive.count.unpushed": "Unpushed commits",
   "destructive.count.untracked": "Untracked files",
   "destructive.force": "I understand these unpushed commits will be discarded.",
-  "destructive.loading": "Loading current facts…",
+  "destructive.loading": "Loading current facts\u2026",
   "destructive.notice.activeSessionSkipped": "One or more sessions in this lane are still active and will be kept, not purged.",
-  "destructive.notice.adopted": "This lane points at a directory you own. Only the dashboard's record of it is dropped — the directory and its files are left untouched.",
+  "destructive.notice.adopted": "This lane points at a directory you own. Only the dashboard's record of it is dropped \u2014 the directory and its files are left untouched.",
   "destructive.notice.missing": "The lane directory is already gone. Removing it drops the dashboard's record and clears Git's stale worktree entry; nothing is deleted from disk.",
   "destructive.notice.unreadable": "The lane directory cannot be read as a Git worktree. Removal is attempted; if Git itself refuses, its worktree record is cleared directly instead. Either way, the directory itself is never touched.",
   "destructive.purge.confirm": "Purge history",
@@ -57,22 +57,24 @@
   "destructive.reset.title": "Reset managed worktree?",
   "destructive.warning.no-remote": "No Git remote is configured, so nothing here is backed up remotely. You can still proceed.",
   "emptyState": "No lanes yet. Create one from a working directory:",
-  "git.uncommitted": "{{dirty}} modified · {{untracked}} untracked",
+  "git.uncommitted": "{{dirty}} modified \u00b7 {{untracked}} untracked",
   "kind.adopted": "adopted",
   "kind.managed": "managed",
-  "laneHeader": "Lane {{id}} · {{title}} · {{pipeline}}",
+  "laneHeader": "Lane {{id}} \u00b7 {{title}} \u00b7 {{pipeline}}",
+  "locks.held_one": "{{count}} lock held",
+  "locks.held_other": "{{count}} locks held",
   "moreActions": "More actions",
   "preflightError": "Could not load the current lane facts.",
   "preflightErrorWithMessage": "Could not load the current lane facts: {{message}}",
-  "runtime.boot": "▶ up",
-  "runtime.busy.down": "stopping…",
-  "runtime.busy.up": "booting…",
+  "runtime.boot": "\u25b6 up",
+  "runtime.busy.down": "stopping\u2026",
+  "runtime.busy.up": "booting\u2026",
   "runtime.down": "down",
   "runtime.healthy": "healthy",
   "runtime.partial": "partial",
   "runtime.slot": "slot {{slot}}",
   "runtime.steppedAsideTitle": "Stepped aside from {{expected}}, which was already in use",
-  "runtime.stop": "■ down",
+  "runtime.stop": "\u25a0 down",
   "runtime.toggleTitle": "Boot or stop this lane's own application stack (separate from its Claude run)",
   "stageUndeclared": "not declared",
   "status.failed": "failed",
diff --git a/client/src/i18n/locales/vi/lanes.json b/client/src/i18n/locales/vi/lanes.json
index 2b2c688..7e00e7b 100644
--- a/client/src/i18n/locales/vi/lanes.json
+++ b/client/src/i18n/locales/vi/lanes.json
@@ -1,85 +1,87 @@
 {
-  "action.clear": "dọn trạng thái",
-  "action.forget": "xóa làn",
-  "action.purge": "xóa lịch sử",
-  "action.remove": "xóa làn + worktree",
-  "action.reset": "đặt lại worktree",
-  "action.start": "bắt đầu",
-  "action.stop": "dừng",
-  "actionError": "Thao tác làn đường thất bại: {{message}}",
-  "actionErrorUnknown": "Lỗi không xác định",
-  "add": "Thêm lane",
-  "addLane": "Tạo lane từ một thư mục làm việc",
-  "addLaneBaseLabel": "Nhánh để tạo nhánh mới",
-  "addLaneNoBranches": "Repo này chưa có commit nào — worktree sẽ bắt đầu trống.",
-  "addLaneNotARepo": "Chưa phải repo git (hoặc không có quyền đọc).",
-  "addLaneRepoHint": "Một repo git có sẵn. Dashboard tự tạo worktree mới cho lane, không phải thư mục bạn chọn.",
-  "addLaneRepoLabel": "Repo nguồn",
-  "addLaneTitleLabel": "Tiêu đề",
-  "addLaneTitlePlaceholder": "Không bắt buộc",
-  "autoStage": "tự động: {{stage}}",
-  "cardId": "Làn đường {{id}}",
-  "confirmRemoveCancel": "Hủy",
-  "confirmRemoveConfirm": "Xóa",
-  "confirmRemoveMessage": "Hành động này không thể hoàn tác.",
-  "confirmRemoveTitle": "Xóa làn đường?",
-  "countDead": "đã chết",
-  "countNeedsYou": "cần bạn",
-  "countRunning": "đang chạy",
-  "countTotal": "làn đường",
-  "destructive.blocked.adopted": "Đây là thư mục đã nhận và không thể thay đổi bằng thao tác worktree.",
-  "destructive.blocked.missing": "Thư mục làn đường không còn, nên không thể tiếp tục thao tác này.",
-  "destructive.blocked.unreadable": "Không thể đọc thư mục làn đường như một Git worktree, nên không thể tiếp tục thao tác này.",
-  "destructive.cancel": "Hủy",
-  "destructive.count.bytesEstimate": "Dung lượng giải phóng (ước tính)",
-  "destructive.count.dirty": "Tệp đã sửa",
-  "destructive.count.events": "Sự kiện",
+  "action.clear": "d\u1ecdn tr\u1ea1ng th\u00e1i",
+  "action.forget": "x\u00f3a l\u00e0n",
+  "action.purge": "x\u00f3a l\u1ecbch s\u1eed",
+  "action.remove": "x\u00f3a l\u00e0n + worktree",
+  "action.reset": "\u0111\u1eb7t l\u1ea1i worktree",
+  "action.start": "b\u1eaft \u0111\u1ea7u",
+  "action.stop": "d\u1eebng",
+  "actionError": "Thao t\u00e1c l\u00e0n \u0111\u01b0\u1eddng th\u1ea5t b\u1ea1i: {{message}}",
+  "actionErrorUnknown": "L\u1ed7i kh\u00f4ng x\u00e1c \u0111\u1ecbnh",
+  "add": "Th\u00eam lane",
+  "addLane": "T\u1ea1o lane t\u1eeb m\u1ed9t th\u01b0 m\u1ee5c l\u00e0m vi\u1ec7c",
+  "addLaneBaseLabel": "Nh\u00e1nh \u0111\u1ec3 t\u1ea1o nh\u00e1nh m\u1edbi",
+  "addLaneNoBranches": "Repo n\u00e0y ch\u01b0a c\u00f3 commit n\u00e0o \u2014 worktree s\u1ebd b\u1eaft \u0111\u1ea7u tr\u1ed1ng.",
+  "addLaneNotARepo": "Ch\u01b0a ph\u1ea3i repo git (ho\u1eb7c kh\u00f4ng c\u00f3 quy\u1ec1n \u0111\u1ecdc).",
+  "addLaneRepoHint": "M\u1ed9t repo git c\u00f3 s\u1eb5n. Dashboard t\u1ef1 t\u1ea1o worktree m\u1edbi cho lane, kh\u00f4ng ph\u1ea3i th\u01b0 m\u1ee5c b\u1ea1n ch\u1ecdn.",
+  "addLaneRepoLabel": "Repo ngu\u1ed3n",
+  "addLaneTitleLabel": "Ti\u00eau \u0111\u1ec1",
+  "addLaneTitlePlaceholder": "Kh\u00f4ng b\u1eaft bu\u1ed9c",
+  "autoStage": "t\u1ef1 \u0111\u1ed9ng: {{stage}}",
+  "cardId": "L\u00e0n \u0111\u01b0\u1eddng {{id}}",
+  "confirmRemoveCancel": "H\u1ee7y",
+  "confirmRemoveConfirm": "X\u00f3a",
+  "confirmRemoveMessage": "H\u00e0nh \u0111\u1ed9ng n\u00e0y kh\u00f4ng th\u1ec3 ho\u00e0n t\u00e1c.",
+  "confirmRemoveTitle": "X\u00f3a l\u00e0n \u0111\u01b0\u1eddng?",
+  "countDead": "\u0111\u00e3 ch\u1ebft",
+  "countNeedsYou": "c\u1ea7n b\u1ea1n",
+  "countRunning": "\u0111ang ch\u1ea1y",
+  "countTotal": "l\u00e0n \u0111\u01b0\u1eddng",
+  "destructive.blocked.adopted": "\u0110\u00e2y l\u00e0 th\u01b0 m\u1ee5c \u0111\u00e3 nh\u1eadn v\u00e0 kh\u00f4ng th\u1ec3 thay \u0111\u1ed5i b\u1eb1ng thao t\u00e1c worktree.",
+  "destructive.blocked.missing": "Th\u01b0 m\u1ee5c l\u00e0n \u0111\u01b0\u1eddng kh\u00f4ng c\u00f2n, n\u00ean kh\u00f4ng th\u1ec3 ti\u1ebfp t\u1ee5c thao t\u00e1c n\u00e0y.",
+  "destructive.blocked.unreadable": "Kh\u00f4ng th\u1ec3 \u0111\u1ecdc th\u01b0 m\u1ee5c l\u00e0n \u0111\u01b0\u1eddng nh\u01b0 m\u1ed9t Git worktree, n\u00ean kh\u00f4ng th\u1ec3 ti\u1ebfp t\u1ee5c thao t\u00e1c n\u00e0y.",
+  "destructive.cancel": "H\u1ee7y",
+  "destructive.count.bytesEstimate": "Dung l\u01b0\u1ee3ng gi\u1ea3i ph\u00f3ng (\u01b0\u1edbc t\u00ednh)",
+  "destructive.count.dirty": "T\u1ec7p \u0111\u00e3 s\u1eeda",
+  "destructive.count.events": "S\u1ef1 ki\u1ec7n",
   "destructive.count.head": "HEAD",
-  "destructive.count.sessions": "Phiên",
-  "destructive.count.tokenRows": "Dòng token",
-  "destructive.count.unpushed": "Commit chưa đẩy",
-  "destructive.count.untracked": "Tệp chưa theo dõi",
-  "destructive.force": "Tôi hiểu các commit chưa đẩy này sẽ bị loại bỏ.",
-  "destructive.loading": "Đang tải trạng thái hiện tại…",
-  "destructive.notice.activeSessionSkipped": "Một hoặc nhiều phiên trong làn đường này vẫn đang hoạt động và sẽ được giữ lại, không bị dọn.",
-  "destructive.notice.adopted": "Làn đường này trỏ tới thư mục của bạn. Chỉ bản ghi trên bảng điều khiển bị xóa — thư mục và các tệp bên trong không bị thay đổi.",
-  "destructive.notice.missing": "Thư mục làn đường đã không còn. Việc xóa chỉ bỏ bản ghi trên bảng điều khiển và dọn mục worktree cũ trong Git; không tệp nào bị xóa khỏi đĩa.",
-  "destructive.notice.unreadable": "Không thể đọc thư mục làn đường như một Git worktree. Hệ thống sẽ thử xóa; nếu Git tự chối, mục ghi worktree của nó sẽ được dọn trực tiếp thay thế. Trong mọi trường hợp, thư mục vẫn không bị thay đổi.",
-  "destructive.purge.confirm": "Xóa lịch sử",
-  "destructive.purge.message": "Hãy xác nhận các số liệu hiện tại trước khi xóa lịch sử phiên đã lưu.",
-  "destructive.purge.title": "Xóa lịch sử làn đường?",
-  "destructive.remove.confirm": "Xóa làn đường",
-  "destructive.remove.message": "Hãy xác nhận các số liệu hiện tại trước khi thực hiện thao tác này.",
-  "destructive.remove.title": "Xóa làn đường?",
-  "destructive.reset.confirm": "Đặt lại worktree",
-  "destructive.reset.message": "Hãy xác nhận các số liệu hiện tại trước khi đặt lại worktree này.",
-  "destructive.reset.survives": "Các tệp Git bỏ qua như node_modules và .env được giữ lại; các tệp chưa theo dõi sẽ bị xóa.",
-  "destructive.reset.title": "Đặt lại worktree được quản lý?",
-  "destructive.warning.no-remote": "Chưa cấu hình Git remote, nên không có bản sao lưu ở xa. Bạn vẫn có thể tiếp tục.",
-  "emptyState": "Chưa có làn đường nào. Tạo một từ thư mục làm việc:",
-  "git.uncommitted": "{{dirty}} đã sửa · {{untracked}} chưa theo dõi",
-  "kind.adopted": "đã nhận",
-  "kind.managed": "được quản lý",
-  "laneHeader": "Làn đường {{id}} · {{title}} · {{pipeline}}",
-  "moreActions": "Thêm hành động",
-  "preflightError": "Không thể tải trạng thái làn đường hiện tại.",
-  "preflightErrorWithMessage": "Không thể tải trạng thái làn đường hiện tại: {{message}}",
-  "runtime.boot": "▶ chạy",
-  "runtime.busy.down": "đang dừng…",
-  "runtime.busy.up": "đang khởi động…",
-  "runtime.down": "tắt",
-  "runtime.healthy": "khoẻ",
-  "runtime.partial": "một phần",
+  "destructive.count.sessions": "Phi\u00ean",
+  "destructive.count.tokenRows": "D\u00f2ng token",
+  "destructive.count.unpushed": "Commit ch\u01b0a \u0111\u1ea9y",
+  "destructive.count.untracked": "T\u1ec7p ch\u01b0a theo d\u00f5i",
+  "destructive.force": "T\u00f4i hi\u1ec3u c\u00e1c commit ch\u01b0a \u0111\u1ea9y n\u00e0y s\u1ebd b\u1ecb lo\u1ea1i b\u1ecf.",
+  "destructive.loading": "\u0110ang t\u1ea3i tr\u1ea1ng th\u00e1i hi\u1ec7n t\u1ea1i\u2026",
+  "destructive.notice.activeSessionSkipped": "M\u1ed9t ho\u1eb7c nhi\u1ec1u phi\u00ean trong l\u00e0n \u0111\u01b0\u1eddng n\u00e0y v\u1eabn \u0111ang ho\u1ea1t \u0111\u1ed9ng v\u00e0 s\u1ebd \u0111\u01b0\u1ee3c gi\u1eef l\u1ea1i, kh\u00f4ng b\u1ecb d\u1ecdn.",
+  "destructive.notice.adopted": "L\u00e0n \u0111\u01b0\u1eddng n\u00e0y tr\u1ecf t\u1edbi th\u01b0 m\u1ee5c c\u1ee7a b\u1ea1n. Ch\u1ec9 b\u1ea3n ghi tr\u00ean b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n b\u1ecb x\u00f3a \u2014 th\u01b0 m\u1ee5c v\u00e0 c\u00e1c t\u1ec7p b\u00ean trong kh\u00f4ng b\u1ecb thay \u0111\u1ed5i.",
+  "destructive.notice.missing": "Th\u01b0 m\u1ee5c l\u00e0n \u0111\u01b0\u1eddng \u0111\u00e3 kh\u00f4ng c\u00f2n. Vi\u1ec7c x\u00f3a ch\u1ec9 b\u1ecf b\u1ea3n ghi tr\u00ean b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n v\u00e0 d\u1ecdn m\u1ee5c worktree c\u0169 trong Git; kh\u00f4ng t\u1ec7p n\u00e0o b\u1ecb x\u00f3a kh\u1ecfi \u0111\u0129a.",
+  "destructive.notice.unreadable": "Kh\u00f4ng th\u1ec3 \u0111\u1ecdc th\u01b0 m\u1ee5c l\u00e0n \u0111\u01b0\u1eddng nh\u01b0 m\u1ed9t Git worktree. H\u1ec7 th\u1ed1ng s\u1ebd th\u1eed x\u00f3a; n\u1ebfu Git t\u1ef1 ch\u1ed1i, m\u1ee5c ghi worktree c\u1ee7a n\u00f3 s\u1ebd \u0111\u01b0\u1ee3c d\u1ecdn tr\u1ef1c ti\u1ebfp thay th\u1ebf. Trong m\u1ecdi tr\u01b0\u1eddng h\u1ee3p, th\u01b0 m\u1ee5c v\u1eabn kh\u00f4ng b\u1ecb thay \u0111\u1ed5i.",
+  "destructive.purge.confirm": "X\u00f3a l\u1ecbch s\u1eed",
+  "destructive.purge.message": "H\u00e3y x\u00e1c nh\u1eadn c\u00e1c s\u1ed1 li\u1ec7u hi\u1ec7n t\u1ea1i tr\u01b0\u1edbc khi x\u00f3a l\u1ecbch s\u1eed phi\u00ean \u0111\u00e3 l\u01b0u.",
+  "destructive.purge.title": "X\u00f3a l\u1ecbch s\u1eed l\u00e0n \u0111\u01b0\u1eddng?",
+  "destructive.remove.confirm": "X\u00f3a l\u00e0n \u0111\u01b0\u1eddng",
+  "destructive.remove.message": "H\u00e3y x\u00e1c nh\u1eadn c\u00e1c s\u1ed1 li\u1ec7u hi\u1ec7n t\u1ea1i tr\u01b0\u1edbc khi th\u1ef1c hi\u1ec7n thao t\u00e1c n\u00e0y.",
+  "destructive.remove.title": "X\u00f3a l\u00e0n \u0111\u01b0\u1eddng?",
+  "destructive.reset.confirm": "\u0110\u1eb7t l\u1ea1i worktree",
+  "destructive.reset.message": "H\u00e3y x\u00e1c nh\u1eadn c\u00e1c s\u1ed1 li\u1ec7u hi\u1ec7n t\u1ea1i tr\u01b0\u1edbc khi \u0111\u1eb7t l\u1ea1i worktree n\u00e0y.",
+  "destructive.reset.survives": "C\u00e1c t\u1ec7p Git b\u1ecf qua nh\u01b0 node_modules v\u00e0 .env \u0111\u01b0\u1ee3c gi\u1eef l\u1ea1i; c\u00e1c t\u1ec7p ch\u01b0a theo d\u00f5i s\u1ebd b\u1ecb x\u00f3a.",
+  "destructive.reset.title": "\u0110\u1eb7t l\u1ea1i worktree \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd?",
+  "destructive.warning.no-remote": "Ch\u01b0a c\u1ea5u h\u00ecnh Git remote, n\u00ean kh\u00f4ng c\u00f3 b\u1ea3n sao l\u01b0u \u1edf xa. B\u1ea1n v\u1eabn c\u00f3 th\u1ec3 ti\u1ebfp t\u1ee5c.",
+  "emptyState": "Ch\u01b0a c\u00f3 l\u00e0n \u0111\u01b0\u1eddng n\u00e0o. T\u1ea1o m\u1ed9t t\u1eeb th\u01b0 m\u1ee5c l\u00e0m vi\u1ec7c:",
+  "git.uncommitted": "{{dirty}} \u0111\u00e3 s\u1eeda \u00b7 {{untracked}} ch\u01b0a theo d\u00f5i",
+  "kind.adopted": "\u0111\u00e3 nh\u1eadn",
+  "kind.managed": "\u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd",
+  "laneHeader": "L\u00e0n \u0111\u01b0\u1eddng {{id}} \u00b7 {{title}} \u00b7 {{pipeline}}",
+  "locks.held_one": "\u0110ang gi\u1eef {{count}} kh\u00f3a",
+  "locks.held_other": "\u0110ang gi\u1eef {{count}} kh\u00f3a",
+  "moreActions": "Th\u00eam h\u00e0nh \u0111\u1ed9ng",
+  "preflightError": "Kh\u00f4ng th\u1ec3 t\u1ea3i tr\u1ea1ng th\u00e1i l\u00e0n \u0111\u01b0\u1eddng hi\u1ec7n t\u1ea1i.",
+  "preflightErrorWithMessage": "Kh\u00f4ng th\u1ec3 t\u1ea3i tr\u1ea1ng th\u00e1i l\u00e0n \u0111\u01b0\u1eddng hi\u1ec7n t\u1ea1i: {{message}}",
+  "runtime.boot": "\u25b6 ch\u1ea1y",
+  "runtime.busy.down": "\u0111ang d\u1eebng\u2026",
+  "runtime.busy.up": "\u0111ang kh\u1edfi \u0111\u1ed9ng\u2026",
+  "runtime.down": "t\u1eaft",
+  "runtime.healthy": "kho\u1ebb",
+  "runtime.partial": "m\u1ed9t ph\u1ea7n",
   "runtime.slot": "slot {{slot}}",
-  "runtime.steppedAsideTitle": "Đã lùi khỏi {{expected}} vì cổng đó đang bận",
-  "runtime.stop": "■ dừng",
-  "runtime.toggleTitle": "Chạy hoặc dừng stack ứng dụng của lane này (khác với phiên Claude của nó)",
-  "stageUndeclared": "chưa khai báo",
-  "status.failed": "thất bại",
-  "status.idle": "rảnh",
-  "status.provisioning": "đang khởi tạo",
-  "status.running": "đang chạy",
-  "statusDead": "ĐÃ CHẾT",
-  "title": "Làn đường",
-  "tooltipStart": "Tạo một lần chạy ở chế độ hội thoại mà không có lời nhắc ban đầu; được điều khiển từ CLI hoặc qua tin nhắn"
+  "runtime.steppedAsideTitle": "\u0110\u00e3 l\u00f9i kh\u1ecfi {{expected}} v\u00ec c\u1ed5ng \u0111\u00f3 \u0111ang b\u1eadn",
+  "runtime.stop": "\u25a0 d\u1eebng",
+  "runtime.toggleTitle": "Ch\u1ea1y ho\u1eb7c d\u1eebng stack \u1ee9ng d\u1ee5ng c\u1ee7a lane n\u00e0y (kh\u00e1c v\u1edbi phi\u00ean Claude c\u1ee7a n\u00f3)",
+  "stageUndeclared": "ch\u01b0a khai b\u00e1o",
+  "status.failed": "th\u1ea5t b\u1ea1i",
+  "status.idle": "r\u1ea3nh",
+  "status.provisioning": "\u0111ang kh\u1edfi t\u1ea1o",
+  "status.running": "\u0111ang ch\u1ea1y",
+  "statusDead": "\u0110\u00c3 CH\u1ebeT",
+  "title": "L\u00e0n \u0111\u01b0\u1eddng",
+  "tooltipStart": "T\u1ea1o m\u1ed9t l\u1ea7n ch\u1ea1y \u1edf ch\u1ebf \u0111\u1ed9 h\u1ed9i tho\u1ea1i m\u00e0 kh\u00f4ng c\u00f3 l\u1eddi nh\u1eafc ban \u0111\u1ea7u; \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n t\u1eeb CLI ho\u1eb7c qua tin nh\u1eafn"
 }
diff --git a/client/src/lib/api.ts b/client/src/lib/api.ts
index ee91f4b..f6e50c8 100644
--- a/client/src/lib/api.ts
+++ b/client/src/lib/api.ts
@@ -2014,6 +2014,17 @@ export const api = {
         body: JSON.stringify(body),
       }),
   },
+
+  // ──────────────────────────────── Locks API ────────────────────────────────
+  /** Named locks across all lanes: used for serialization and gating.
+   *  Maps to `server/routes/locks.js`. */
+  locks: {
+    /**
+     * GET /api/locks — list all active named locks and their holders.
+     * @returns `{ locks }` — all {@link NamedLock} records.
+     */
+    list: (): Promise<{ locks: NamedLock[] }> => request<{ locks: NamedLock[] }>("/locks"),
+  },
 };
 
 // ─────────────────────────────────────────────────────────────────────────────
diff --git a/client/src/lib/types.ts b/client/src/lib/types.ts
index 3ad8d7c..1c7fad2 100644
--- a/client/src/lib/types.ts
+++ b/client/src/lib/types.ts
@@ -2370,6 +2370,14 @@ export interface LaneRuntimeService {
   alive: boolean;
 }
 
+/** A named lock held by a lane. */
+export interface NamedLock {
+  name: string;
+  holder: string;
+  since: number;
+  ageSec: number;
+}
+
 /**
  * What is actually running for a lane, recomputed by the server on every read
  * rather than cached — a process can die without telling anyone.