diff --git a/.agents/notes/assets/machine-online-motion/linear.gif b/.agents/notes/assets/machine-online-motion/linear.gif
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diff --git a/.agents/notes/implemented/feature/2026-10-20-machine-online-motion.md b/.agents/notes/implemented/feature/2026-10-20-machine-online-motion.md
new file mode 100644
index 0000000000..bd4fb1e33a
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+++ b/.agents/notes/implemented/feature/2026-10-20-machine-online-motion.md
@@ -0,0 +1,52 @@
+# Breathing online machine indicator
+
+Status: implemented
+Translation: current
+
+[中文](2026-10-20-machine-online-motion.zh.md)
+
+PR: [#1742](https://github.com/LodyAI/Lody/pull/1742)
+
+## Abstract
+
+The user requested motion for the static green online mark on machine cards.
+The outer halo now expands and contracts at a constant speed over 2.8 seconds
+while the solid centre stays green. Offline machines remain static, and reduced
+motion retains the original stationary halo. This changes presentation only; the
+existing presence value still determines whether a machine is online.
+
+## Decision
+
+`WorkspaceMachineAccordionRow` owns the same mark in collapsed and expanded
+cards. Its separate decorative halo animates only transform and opacity, keeping
+the dot's layout box, accessible status label, and card interactions unchanged.
+Linear timing gives uniform scaling in each direction, with 1.4 seconds to
+expand and 1.4 seconds to contract. The halo unmounts when `isOnline` becomes
+false. CSS handles the loop and the reduced-motion preference without a timer,
+React updates per frame, or network requests. The centre stays fully visible so
+motion never makes an online machine look disconnected.
+
+The existing MachinesDesktopLayout stories gain a controlled presence preview
+using the real collapsed card. It supports inspection of online/offline transitions
+without requiring a real machine or transport.
+
+## Verification
+
+The existing accordion behavior test passes. Components type checking, targeted
+typed lint, and formatting of the changed TypeScript files pass. A real browser
+run of the OnlineStatusMotion story samples the halo at evenly spaced
+deterministic animation times: equal time steps give equal scale changes in
+each direction, while the centre colour, centre opacity and dot box remain
+unchanged. It also
+verifies online/offline/online transitions and that reduced motion removes the
+animation and preserves a static halo. A two-cycle browser recording provides
+the visual preview.
+
+The full `pnpm check` passes, including workspace type checking, typed and
+Effect lint, all configured workspace tests, i18n validation, and boundary
+guards. `pnpm format` also passes. The documentation check retains six existing
+missing Kimi/Pi submodule links in the bilingual subagent-events note.
+
+A cropped recording of the real card with synthetic machine data:
+
+![Linear online halo animation](../../assets/machine-online-motion/linear.gif)
diff --git a/.agents/notes/implemented/feature/2026-10-20-machine-online-motion.zh.md b/.agents/notes/implemented/feature/2026-10-20-machine-online-motion.zh.md
new file mode 100644
index 0000000000..bc1c68f213
--- /dev/null
+++ b/.agents/notes/implemented/feature/2026-10-20-machine-online-motion.zh.md
@@ -0,0 +1,43 @@
+# 机器在线标记的呼吸动画
+
+Status: implemented
+Translation: current
+
+[English](2026-10-20-machine-online-motion.md)
+
+PR: [#1742](https://github.com/LodyAI/Lody/pull/1742)
+
+## 摘要
+
+用户希望机器卡片原本静态的绿色在线标记具有动态效果。
+现在外圈以 2.8 秒为周期匀速放大、匀速缩小并改变透明度，中心绿点保持常亮。
+离线机器保持静态；启用减少动态效果时，在线外圈也恢复静态。
+本次只改变展示，机器是否在线仍由现有的 presence 状态决定。
+
+## 决定
+
+`WorkspaceMachineAccordionRow` 统一渲染折叠和展开卡片中的标记。
+独立的装饰外圈只动画化 transform 和 opacity，圆点的布局尺寸、可访问状态标签及
+卡片交互保持不变。使用线性时序，放大与缩小各用 1.4 秒，每个方向的缩放速度保持
+恒定。`isOnline` 变为 false 时卸载外圈。循环和减少动态效果偏好
+交给 CSS 处理，不增加定时器、逐帧 React 更新或网络请求。
+中心始终保持可见，避免动画让在线机器看起来断开了连接。
+
+现有 MachinesDesktopLayout stories 增加受控在线状态预览，使用真实的折叠卡片，
+无需真实机器或传输连接即可检查在线和离线切换。
+
+## 验证
+
+现有折叠卡片行为测试通过。组件类型检查、针对修改文件的类型感知 lint，以及修改的
+TypeScript 文件格式化通过。浏览器运行真实的 OnlineStatusMotion story，在等间隔的
+确定动画时间点取样：每个方向的等间隔时间产生等量缩放变化，中心颜色、中心透明度
+及圆点布局尺寸保持不变。另验证了在线／离线／在线切换，以及减少动态效果会取消动画
+并保留静态外圈。浏览器录制的两个循环用于动态预览。
+
+完整的 `pnpm check` 通过，包括工作区类型检查、类型感知与 Effect lint、全部配置的
+工作区测试、国际化验证和边界检查；`pnpm format` 也通过。文档检查仍有
+subagent-events 双语笔记中原有的六个本地 Kimi/Pi 子模块缺失链接。
+
+以下为使用合成机器数据的真实卡片局部录制：
+
+![Linear online halo animation](../../assets/machine-online-motion/linear.gif)
diff --git a/packages/components/src/components/settings/README.md b/packages/components/src/components/settings/README.md
new file mode 100644
index 0000000000..8a0abea10c
--- /dev/null
+++ b/packages/components/src/components/settings/README.md
@@ -0,0 +1,15 @@
+# Settings surfaces
+
+Binding guidelines live in [AGENTS.md](AGENTS.md).
+
+## Machine connection marks
+
+`workspace-machine-accordion.tsx` renders the connection mark for collapsed and
+expanded machine cards. An online machine keeps its solid green centre while
+its halo expands and contracts at a constant speed over 2.8 seconds, using linear
+CSS transform and opacity animation. Each direction takes 1.4 seconds.
+Offline machines keep a static gray dot. Reduced motion keeps the online halo
+static. Motion follows the existing `isOnline` value and adds no presence polling.
+
+The [OnlineStatusMotion story](../../stories/DevicesDesktopLayout.stories.tsx)
+uses the real machine card with a controlled online/offline value for inspection.
diff --git a/packages/components/src/components/settings/workspace-machine-accordion.tsx b/packages/components/src/components/settings/workspace-machine-accordion.tsx
index 381bc2db07..4056ed2efc 100644
--- a/packages/components/src/components/settings/workspace-machine-accordion.tsx
+++ b/packages/components/src/components/settings/workspace-machine-accordion.tsx
@@ -23,6 +23,11 @@ export type WorkspaceMachineAccordionMeta = {
   agentCount: number;
 };
 
+const onlineHaloBreathe = stylex.keyframes({
+  '0%, 100%': { transform: 'scale(0.875)', opacity: 0.12 },
+  '50%': { transform: 'scale(1.2)', opacity: 0.28 },
+});
+
 const styles = stylex.create({
   summary: {
     display: 'flex',
@@ -102,6 +107,7 @@ const styles = stylex.create({
     },
   },
   dot: {
+    position: 'relative',
     flexShrink: 0,
     width: '10px',
     height: '10px',
@@ -111,7 +117,23 @@ const styles = stylex.create({
   },
   dotOnline: {
     backgroundColor: colors.success,
-    boxShadow: `0 0 0 3px color-mix(in oklab, ${colors.success} 20%, transparent)`,
+  },
+  /** Only the halo breathes; the solid centre continues to say "online". */
+  onlineHalo: {
+    position: 'absolute',
+    inset: '-3px',
+    borderRadius: radius.full,
+    cornerShape: corner.round,
+    backgroundColor: colors.success,
+    opacity: 0.2,
+    pointerEvents: 'none',
+    animationName: {
+      default: onlineHaloBreathe,
+      '@media (prefers-reduced-motion: reduce)': 'none',
+    },
+    animationDuration: '2.8s',
+    animationTimingFunction: 'linear',
+    animationIterationCount: 'infinite',
   },
   name: {
     flexGrow: 1,
@@ -270,7 +292,9 @@ export function WorkspaceMachineAccordionRow({
           role="img"
           aria-label={statusLabel}
           {...stylex.props(styles.dot, meta.isOnline && styles.dotOnline)}
-        />
+        >
+          {meta.isOnline ? <span aria-hidden {...stylex.props(styles.onlineHalo)} /> : null}
+        </span>
         <span {...stylex.props(styles.name)}>{machineName}</span>
         <Summary meta={meta} showOwner={false} inRow />
         <ChevronDown
diff --git a/packages/components/src/stories/DevicesDesktopLayout.stories.tsx b/packages/components/src/stories/DevicesDesktopLayout.stories.tsx
index 0265b54a58..eea3073b3c 100644
--- a/packages/components/src/stories/DevicesDesktopLayout.stories.tsx
+++ b/packages/components/src/stories/DevicesDesktopLayout.stories.tsx
@@ -1,6 +1,7 @@
 import type { Meta, StoryObj } from '@storybook/react';
 import { useMemo, useState } from 'react';
 import { fn } from 'storybook/test';
+import { Button } from '@lody/ui/button';
 import type {
   AgentConfigId,
   AgentConfigMeta,
@@ -451,3 +452,36 @@ export const OfflinePrivateMachine: Story = {
 export const WaitingForResourceSample: Story = {
   args: { resourcePending: true },
 };
+
+/** A real card with controlled presence, for motion and reduced-motion inspection. */
+function MachineOnlineStatusPreview() {
+  const [isOnline, setIsOnline] = useState(true);
+  const previewMeta: WorkspaceMachineAccordionMeta = {
+    machine: {
+      id: 'machine-status-preview' as MachineId,
+      name: 'Docker Agent Workspace',
+      os: 'Linux',
+      cliVersion: '0.57.1',
+      sessions: [],
+      raceLimits: {},
+    },
+    isOnline,
+    isLocal: true,
+    isPrivate: false,
+    owner: null,
+    directoryCount: 4,
+    agentCount: 3,
+  };
+  return (
+    <div className="space-y-4">
+      <WorkspaceMachineCollapsedRow meta={previewMeta} onExpand={fn()} />
+      <Button variant="secondary" size="small" onClick={() => setIsOnline((online) => !online)}>
+        Toggle online status
+      </Button>
+    </div>
+  );
+}
+
+export const OnlineStatusMotion: Story = {
+  render: () => <MachineOnlineStatusPreview />,
+};