diff --git a/src/renderer/src/components/right-sidebar/OrchestratorMissionControl.spawned-activity.test.tsx b/src/renderer/src/components/right-sidebar/OrchestratorMissionControl.spawned-activity.test.tsx
new file mode 100644
index 00000000000..6046eff6cb4
--- /dev/null
+++ b/src/renderer/src/components/right-sidebar/OrchestratorMissionControl.spawned-activity.test.tsx
@@ -0,0 +1,138 @@
+// @vitest-environment happy-dom
+
+import React, { act } from 'react'
+import { createRoot, type Root } from 'react-dom/client'
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+
+type MockStore = {
+  orchestrators: { worktreeId: string; projectName?: string }[]
+  worktreeLineageById: Record<string, unknown>
+  worktreesByRepo: Record<
+    string,
+    { id: string; repoId: string; branch?: string; displayName?: string; path?: string }[]
+  >
+  tabsByWorktree: Record<string, { id: string }[]>
+  agentStatusByPaneKey: Record<string, unknown>
+  orchestrationActivityByPaneKey: Record<string, unknown>
+  orchestrationRunDagByPaneKey: Record<string, unknown>
+  repos: { id: string; path: string; connectionId?: string }[]
+  settings: Record<string, unknown>
+  hostedReviewCache: Record<string, unknown>
+}
+
+const harness = vi.hoisted(() => ({
+  store: {} as MockStore
+}))
+
+vi.mock('@/store', () => ({
+  useAppStore: <T,>(selector: (s: MockStore) => T): T => selector(harness.store)
+}))
+
+vi.mock('@/i18n/i18n', () => ({
+  translate: (_key: string, fallback: string) => fallback
+}))
+
+vi.mock('./MissionControlTasksSection', () => ({
+  MissionControlTasksSection: () => <div data-testid="tasks-section" />
+}))
+
+// Why: the card renders its compact header; surfacing `headerLeft` lets us assert
+// the live activity line the lineage row injects without mounting the heavy
+// Checks panel.
+vi.mock('./MissionControlPrReviewCard', () => ({
+  MissionControlPrReviewCard: (props: { headerLeft?: React.ReactNode }) => (
+    <div data-testid="pr-card">{props.headerLeft}</div>
+  )
+}))
+
+vi.mock('./MissionControlPrStatePill', () => ({ PrStatePill: () => <span /> }))
+
+vi.mock('@/lib/orcastrate-log-shipped-work', () => ({
+  parseOrchestrateLogOutcomes: () => [],
+  selectShippedWork: () => []
+}))
+
+import OrchestratorMissionControl from './OrchestratorMissionControl'
+
+function baseStore(): MockStore {
+  return {
+    orchestrators: [{ worktreeId: 'wt_director', projectName: 'Auth rewrite' }],
+    // One spawned worker whose lineage parent is the director.
+    worktreeLineageById: {
+      wt_worker: { worktreeId: 'wt_worker', parentWorktreeId: 'wt_director', createdAt: 1 }
+    },
+    worktreesByRepo: {
+      repo1: [
+        { id: 'wt_director', repoId: 'repo1', path: '/d', branch: 'main' },
+        { id: 'wt_worker', repoId: 'repo1', path: '/w', branch: 'feat/x', displayName: 'worker-1' }
+      ]
+    },
+    tabsByWorktree: { wt_director: [{ id: 'tab_a' }], wt_worker: [{ id: 'tab_w' }] },
+    agentStatusByPaneKey: {},
+    orchestrationActivityByPaneKey: {},
+    orchestrationRunDagByPaneKey: {},
+    repos: [{ id: 'repo1', path: '/repo' }],
+    settings: {},
+    hostedReviewCache: {}
+  }
+}
+
+let container: HTMLDivElement
+let root: Root
+
+beforeEach(() => {
+  harness.store = baseStore()
+  ;(globalThis as unknown as { window: { api: unknown } }).window.api = {
+    fs: { readFile: () => Promise.resolve({ content: '' }) },
+    gh: {
+      repoSlug: () => Promise.resolve(null),
+      listWorkItems: () => Promise.resolve({ items: [] })
+    },
+    shell: { openUrl: () => Promise.resolve() }
+  }
+  container = document.createElement('div')
+  document.body.appendChild(container)
+  root = createRoot(container)
+})
+
+afterEach(() => {
+  act(() => root.unmount())
+  container.remove()
+})
+
+async function renderPanel(): Promise<void> {
+  await act(async () => {
+    root.render(<OrchestratorMissionControl worktreeId="wt_director" />)
+  })
+}
+
+describe('OrchestratorMissionControl — Spawned work activity line', () => {
+  it("renders the worker's live agent activity text under its name", async () => {
+    harness.store.agentStatusByPaneKey = {
+      'tab_w:leaf': {
+        state: 'working',
+        prompt: 'Refactoring the auth module',
+        stateStartedAt: 100
+      }
+    }
+    await renderPanel()
+    expect(container.textContent).toContain('worker-1')
+    expect(container.textContent).toContain('Refactoring the auth module')
+  })
+
+  it('falls back to the state label when the live agent reported no prompt', async () => {
+    harness.store.agentStatusByPaneKey = {
+      'tab_w:leaf': { state: 'working', prompt: '', stateStartedAt: 100 }
+    }
+    await renderPanel()
+    expect(container.textContent).toContain('worker-1')
+    expect(container.textContent).toContain('Working')
+  })
+
+  it('omits the activity line when no agent has reported for the worker', async () => {
+    await renderPanel()
+    expect(container.textContent).toContain('worker-1')
+    // No live entry → no activity text (and no state-label fallback) on the row.
+    expect(container.textContent).not.toContain('Working')
+  })
+})
diff --git a/src/renderer/src/components/right-sidebar/OrchestratorMissionControl.tsx b/src/renderer/src/components/right-sidebar/OrchestratorMissionControl.tsx
index 2259f6c9c59..c07ecadab15 100644
--- a/src/renderer/src/components/right-sidebar/OrchestratorMissionControl.tsx
+++ b/src/renderer/src/components/right-sidebar/OrchestratorMissionControl.tsx
@@ -3,6 +3,7 @@ import { ExternalLink, GitMerge, Network } from 'lucide-react'
 import { useAppStore } from '@/store'
 import { AgentStateDot } from '@/components/AgentStateDot'
 import { deriveWorktreeAgentDotState } from '@/lib/worktree-agent-dot-state'
+import { selectWorktreeAgentActivityText } from '@/lib/worktree-agent-activity-text'
 import { deriveOrcastratorDotState } from '@/lib/orcastrator-dot-state'
 import {
   selectOrchestrationActivityForTabs,
@@ -329,6 +330,9 @@ export default function OrchestratorMissionControl({
                 }
                 const tabIds = (tabsByWorktree[id] ?? []).map((tab) => tab.id)
                 const dot = deriveWorktreeAgentDotState(tabIds, agentStatusByPaneKey)
+                // Why: mirror DashboardAgentRow's live activity line so a worker
+                // row shows what its agent is currently doing, not just a dot.
+                const activityText = selectWorktreeAgentActivityText(tabIds, agentStatusByPaneKey)
                 const prBadge = prBadgeForWorker(worker)
                 const prUrl = prBadge?.url
                 return (
@@ -338,7 +342,17 @@ export default function OrchestratorMissionControl({
                     headerLeft={
                       <>
                         <AgentStateDot state={dot} size="sm" />
-                        <span className="min-w-0 flex-1 truncate">{worker.displayName ?? id}</span>
+                        <span className="flex min-w-0 flex-1 flex-col">
+                          <span className="truncate">{worker.displayName ?? id}</span>
+                          {activityText ? (
+                            <span
+                              className="truncate text-[11px] leading-snug text-muted-foreground"
+                              title={activityText}
+                            >
+                              {activityText}
+                            </span>
+                          ) : null}
+                        </span>
                       </>
                     }
                     headerRight={
diff --git a/src/renderer/src/lib/worktree-agent-activity-text.ts b/src/renderer/src/lib/worktree-agent-activity-text.ts
new file mode 100644
index 00000000000..7a46aceb473
--- /dev/null
+++ b/src/renderer/src/lib/worktree-agent-activity-text.ts
@@ -0,0 +1,21 @@
+import { agentStateLabel } from '@/components/AgentStateDot'
+import { getAgentRowPrimaryText } from '@/lib/agent-row-primary-text'
+import { selectFreshestWorktreeAgentEntry } from '@/lib/worktree-agent-dot-state'
+import type { AgentStatusEntry } from '../../../shared/agent-status-types'
+
+// Why: the lineage "Spawned work" rows show the same live activity line
+// DashboardAgentRow derives — the freshest agent's orchestration label/prompt —
+// so the text and its live updates match the rest of the app. Falls back to the
+// state label when an agent is live but reported no prompt (mirrors
+// DashboardAgentRow's empty case); null when no agent has reported for the
+// worktree, so the row omits the line instead of showing a placeholder.
+export function selectWorktreeAgentActivityText(
+  tabIds: readonly string[],
+  agentStatusByPaneKey: Record<string, AgentStatusEntry>
+): string | null {
+  const entry = selectFreshestWorktreeAgentEntry(tabIds, agentStatusByPaneKey)
+  if (!entry) {
+    return null
+  }
+  return getAgentRowPrimaryText(entry) || agentStateLabel(entry.state)
+}
diff --git a/src/renderer/src/lib/worktree-agent-dot-state.ts b/src/renderer/src/lib/worktree-agent-dot-state.ts
index b7d510151ee..c79a8554f84 100644
--- a/src/renderer/src/lib/worktree-agent-dot-state.ts
+++ b/src/renderer/src/lib/worktree-agent-dot-state.ts
@@ -1,13 +1,13 @@
 import type { AgentDotState } from '@/components/AgentStateDot'
 import type { AgentStatusEntry } from '../../../shared/agent-status-types'
 
-// Why: a worktree's live agent state is the freshest agent-status entry among
-// its tabs (paneKey is `${tabId}:${leafId}`). Shared so the Orcastrators sidebar
-// and Mission Control render identical dots from one rule, not two copies.
-export function deriveWorktreeAgentDotState(
+// Why: a worktree's live agent is the freshest agent-status entry among its tabs
+// (paneKey is `${tabId}:${leafId}`). Shared so the dot and the per-row activity
+// line derive from one rule, not several copies that could drift apart.
+export function selectFreshestWorktreeAgentEntry(
   tabIds: readonly string[],
   agentStatusByPaneKey: Record<string, AgentStatusEntry>
-): AgentDotState {
+): AgentStatusEntry | null {
   let latest: AgentStatusEntry | null = null
   for (const [paneKey, entry] of Object.entries(agentStatusByPaneKey)) {
     const colon = paneKey.indexOf(':')
@@ -18,5 +18,14 @@ export function deriveWorktreeAgentDotState(
       latest = entry
     }
   }
-  return latest?.state ?? 'idle'
+  return latest
+}
+
+// Why: shared so the Orcastrators sidebar and Mission Control render identical
+// dots from one rule, not two copies.
+export function deriveWorktreeAgentDotState(
+  tabIds: readonly string[],
+  agentStatusByPaneKey: Record<string, AgentStatusEntry>
+): AgentDotState {
+  return selectFreshestWorktreeAgentEntry(tabIds, agentStatusByPaneKey)?.state ?? 'idle'
 }