diff --git a/src/main/runtime/orca-runtime.test.ts b/src/main/runtime/orca-runtime.test.ts
index b1a258e504b..a86beadbea2 100644
--- a/src/main/runtime/orca-runtime.test.ts
+++ b/src/main/runtime/orca-runtime.test.ts
@@ -10471,6 +10471,37 @@ describe('OrcaRuntimeService', () => {
       expect(batches.flatMap((batch) => batch.facts)).not.toContainEqual({ kind: 'agent-exited' })
     })
 
+    it('confirms a host-certified SSH exit that races the foreground read', async () => {
+      const { runtime, batches } = createSideEffectRuntime()
+      runtime.registerPty('pty-1', TEST_WORKTREE_ID, 'conn-1')
+      syncSinglePty(runtime)
+      runtime.onPtySpawned('pty-1', 'inc-ssh-exit', { awaitsRegistration: false })
+      runtime.ingestSyntheticTitleFrame('pty-1', '\x1b]0;Codex ready\x07')
+      let resolveForeground!: (process: string) => void
+      const foregroundRead = new Promise<string>((resolve) => {
+        resolveForeground = resolve
+      })
+      const getForegroundProcess = vi.fn(() => foregroundRead)
+      runtime.setPtyController({
+        write: () => true,
+        kill: () => true,
+        getForegroundProcess
+      })
+
+      runtime.onPtyData('pty-1', '\x1b]0;bichir\x07', 100)
+      await vi.waitFor(() => expect(getForegroundProcess).toHaveBeenCalledOnce())
+      runtime.onPtyExit('pty-1', -1, 'inc-ssh-exit', { hostExitConfirmed: true })
+      resolveForeground('zsh')
+
+      await vi.waitFor(() =>
+        expect(batches.flatMap((batch) => batch.facts)).toContainEqual({
+          kind: 'agent-exited',
+          executionHostConfirmed: true,
+          incarnationId: 'inc-ssh-exit'
+        })
+      )
+    })
+
     it('still confirms a local agent exit if the PTY disconnects during the foreground read', async () => {
       const { runtime, batches } = createSideEffectRuntime()
       runtime.registerPty('pty-1', TEST_WORKTREE_ID)
@@ -15549,7 +15580,7 @@ describe('OrcaRuntimeService', () => {
   })
 
   it('adopts renderer pane identity for remote runtime terminal creates', async () => {
-    const spawn = vi.fn().mockResolvedValue({ id: 'pty-bg' })
+    const spawn = vi.fn().mockResolvedValue({ id: 'pty-bg', incarnationId: 'inc-remote-create' })
     const runtime = new OrcaRuntimeService(store)
     const tabId = 'tab-remote-runtime'
     const leafId = '11111111-1111-4111-8111-111111111111'
@@ -15560,7 +15591,7 @@ describe('OrcaRuntimeService', () => {
       getForegroundProcess: async () => null
     })
 
-    await runtime.createTerminal(`path:${TEST_WORKTREE_PATH}`, {
+    const terminal = await runtime.createTerminal(`path:${TEST_WORKTREE_PATH}`, {
       focus: false,
       tabId,
       leafId,
@@ -15574,6 +15605,7 @@ describe('OrcaRuntimeService', () => {
       (spawn.mock.calls[0]?.[0] as { env?: Record<string, string> } | undefined)?.env ?? {}
     expect(spawnedEnv.ORCA_TAB_ID).toBe(tabId)
     expect(spawnedEnv.ORCA_PANE_KEY).toBe(`${tabId}:${leafId}`)
+    expect(terminal.incarnationId).toBe('inc-remote-create')
   })
 
   it('does not adopt web mirror ids as host terminal ids', async () => {
diff --git a/src/main/runtime/orca-runtime.ts b/src/main/runtime/orca-runtime.ts
index 9b2c7d8536e..93dd647cfef 100644
--- a/src/main/runtime/orca-runtime.ts
+++ b/src/main/runtime/orca-runtime.ts
@@ -1560,6 +1560,8 @@ type RuntimePtyWorktreeRecord = {
   launchAgent: TuiAgent | null
   foregroundAgent: TuiAgent | null
   connected: boolean
+  /** Host-certified exit survives connected=false until pending title reads settle. */
+  hostExitConfirmed: boolean
   disconnectedAt: number | null
   lastExitCode: number | null
   lastExitCause: TerminalExitCause | null
@@ -11259,6 +11261,7 @@ export class OrcaRuntimeService {
     this.spawnPublishedPtys.add(ptyId)
     const pty = this.getOrCreatePtyWorktreeRecord(ptyId)
     if (pty) {
+      pty.hostExitConfirmed = false
       if (incarnationId) {
         pty.incarnationId = incarnationId
       }
@@ -11303,6 +11306,7 @@ export class OrcaRuntimeService {
       ...(binding && paneKey ? { tabId: binding.tabId, paneKey } : {}),
       ...(binding?.incarnationId ? { incarnationId: binding.incarnationId } : {})
     })
+    pty.hostExitConfirmed = false
     const agentLaunchAuthority = binding?.agentLaunchAuthority
     if (
       agentLaunchAuthority &&
@@ -15917,6 +15921,9 @@ export class OrcaRuntimeService {
     this.remoteDesktopViewerRevisions.delete(ptyId)
     this.disposeHeadlessTerminal(ptyId)
     if (pty) {
+      if (options?.hostExitConfirmed === true) {
+        pty.hostExitConfirmed = true
+      }
       pty.connected = false
       pty.runtimeSessionOwned = false
       this.setPairedRendererSessionOwnership(pty.ptyId, false)
@@ -18953,6 +18960,7 @@ export class OrcaRuntimeService {
       tabId: parsed?.tabId ?? record?.tabId ?? '',
       leafId: parsed?.leafId ?? record?.leafId ?? '',
       ptyId: record?.ptyId ?? null,
+      ...(pty?.incarnationId ? { incarnationId: pty.incarnationId } : {}),
       connected: pty?.connected === true,
       ...(worktreeId ? { worktreeId } : {}),
       ...this.getPtyExecutionHostMetadata(record?.ptyId ?? pty?.ptyId ?? null)
@@ -19003,6 +19011,7 @@ export class OrcaRuntimeService {
       tabId: parsed.tabId,
       leafId: parsed.leafId,
       ptyId: terminal.ptyId ?? null,
+      ...(terminal.incarnationId ? { incarnationId: terminal.incarnationId } : {}),
       worktreeId: expectedWorktreeId
     }))
     this.terminalPaneRecoveryByIdentity.set(recoveryKey, recovery)
@@ -19667,7 +19676,7 @@ export class OrcaRuntimeService {
     if (this.getPtyLivenessVerdict(ptyId)?.status === 'unverifiable') {
       return true
     }
-    return Boolean(pty?.connectionId && !pty.connected)
+    return Boolean(pty?.connectionId && !pty.connected && !pty.hostExitConfirmed)
   }
 
   private confirmPtyAgentExit(ptyId: string): void {
@@ -29131,6 +29140,7 @@ export class OrcaRuntimeService {
           tabId,
           paneKey,
           ptyId: result.id,
+          ...(result.incarnationId ? { incarnationId: result.incarnationId } : {}),
           worktreeId: workspace.id,
           title: pty?.title ?? launchOpts.title ?? null,
           ...this.getPtyExecutionHostMetadata(result.id),
@@ -29212,12 +29222,15 @@ export class OrcaRuntimeService {
     // populates this.leaves may not have arrived yet. Wait for the leaf to
     // appear so we can return a valid handle the caller can use right away.
     const handle = await this.waitForTerminalHandle(reply.tabId)
+    const ptyId = this.handles.get(handle)?.ptyId ?? null
+    const incarnationId = ptyId ? (this.ptysById.get(ptyId)?.incarnationId ?? null) : null
     return {
       handle,
       tabId: reply.tabId,
       worktreeId: worktreeId ?? '',
       title: reply.title,
-      ...this.getPtyExecutionHostMetadata(this.handles.get(handle)?.ptyId ?? null),
+      ...(incarnationId ? { incarnationId } : {}),
+      ...this.getPtyExecutionHostMetadata(ptyId),
       surface: 'visible'
     }
   }
@@ -29301,7 +29314,8 @@ export class OrcaRuntimeService {
     this.adoptControllerTerminalHandle(session.id, terminalHandle)
     const pty = this.recordPtyWorktree(session.id, worktreeId, {
       connected: true,
-      title: session.title
+      title: session.title,
+      ...(session.incarnationId ? { incarnationId: session.incarnationId } : {})
     })
     const adoptedHandle = this.issuePtyHandle(pty)
     if (adoptedHandle !== terminalHandle) {
@@ -29310,6 +29324,7 @@ export class OrcaRuntimeService {
     return {
       handle: adoptedHandle,
       ptyId: session.id,
+      ...(session.incarnationId ? { incarnationId: session.incarnationId } : {}),
       worktreeId,
       title: session.title || null,
       surface: 'background'
@@ -33182,6 +33197,7 @@ export class OrcaRuntimeService {
         launchAgent: null,
         foregroundAgent: null,
         connected: state.connected ?? true,
+        hostExitConfirmed: false,
         disconnectedAt: state.connected === false ? Date.now() : null,
         lastExitCode: null,
         lastExitCause: null,
diff --git a/src/renderer/src/components/terminal-pane/pty-connection/pane-pty-binding.ts b/src/renderer/src/components/terminal-pane/pty-connection/pane-pty-binding.ts
index 86f9523324c..f21ac36be4d 100644
--- a/src/renderer/src/components/terminal-pane/pty-connection/pane-pty-binding.ts
+++ b/src/renderer/src/components/terminal-pane/pty-connection/pane-pty-binding.ts
@@ -1,5 +1,6 @@
 import type { IDisposable } from '@xterm/xterm'
 import type { HasPty } from '../terminal-dead-session-reconcile'
+import type { PtyIncarnationId } from '../../../../../shared/pty-incarnation'
 
 export type PanePtyBinding = IDisposable & {
   syncProcessTracking: () => void
@@ -27,4 +28,6 @@ export type PanePtyBinding = IDisposable & {
    *  preserves on exit. Read at unmount so the parked sidecar can carry the
    *  fact as a plain value instead of a session reference. */
   isUntouchedFreshSpawnPty: (ptyId: string) => boolean
+  /** Captured by parked watchers so confirmed exit facts retain incarnation authority. */
+  getPtyIncarnationId?: (ptyId: string) => PtyIncarnationId | null
 }
diff --git a/src/renderer/src/components/terminal-pane/pty-connection/pane-pty-visibility-bind.ts b/src/renderer/src/components/terminal-pane/pty-connection/pane-pty-visibility-bind.ts
index 4bcf7f81838..97058843745 100644
--- a/src/renderer/src/components/terminal-pane/pty-connection/pane-pty-visibility-bind.ts
+++ b/src/renderer/src/components/terminal-pane/pty-connection/pane-pty-visibility-bind.ts
@@ -130,12 +130,17 @@ export function installPanePtyVisibilityBind(session: ConnectPanePtySession): vo
       // Do not strand a successful spawn because a delivery callback failed.
     }
   }
-  session.onPtyRebind = (ptyId: string, replacedPtyId: string): void => {
+  session.onPtyRebind = (
+    ptyId: string,
+    replacedPtyId: string,
+    incarnationId?: PtyIncarnationId
+  ): void => {
     if (!session.canAdoptCapturedDirectSshRetryPty(ptyId)) {
       return
     }
     // Why: provider handle rotation keeps the existing pane/session generation;
     // replace its stale store identity without fresh-spawn exit semantics.
+    session.ptyIncarnationId = incarnationId ?? null
     session.bindActivePanePty(ptyId, { replacePtyId: replacedPtyId })
   }
   // ─── Attention signal: BEL ────────────────────────────────────────────
diff --git a/src/renderer/src/components/terminal-pane/pty-connection/session-reconcile-dispose.ts b/src/renderer/src/components/terminal-pane/pty-connection/session-reconcile-dispose.ts
index 16541b4e72d..769d2cbf430 100644
--- a/src/renderer/src/components/terminal-pane/pty-connection/session-reconcile-dispose.ts
+++ b/src/renderer/src/components/terminal-pane/pty-connection/session-reconcile-dispose.ts
@@ -174,6 +174,8 @@ export function installSessionReconcileDispose(session: ConnectPanePtySession):
     reconcileIfSessionMissing: session.reconcileIfSessionMissing,
     isUntouchedFreshSpawnPty: (ptyId) =>
       session.spawnedFreshPtyId === ptyId && !Number.isFinite(session.lastTerminalInputAt),
+    getPtyIncarnationId: (ptyId) =>
+      session.transport.getPtyId() === ptyId ? session.ptyIncarnationId : null,
     dispose() {
       session.disposed = true
       // Why: a detached client stops observing the pane's bytes, so it must cede
diff --git a/src/renderer/src/components/terminal-pane/pty-transport-types.ts b/src/renderer/src/components/terminal-pane/pty-transport-types.ts
index abc8c5c711b..24ab0cb63f1 100644
--- a/src/renderer/src/components/terminal-pane/pty-transport-types.ts
+++ b/src/renderer/src/components/terminal-pane/pty-transport-types.ts
@@ -258,7 +258,7 @@ export type IpcPtyTransportOptions = {
   onTitleChange?: (title: string, rawTitle: string) => void
   onPtySpawn?: (ptyId: string, incarnationId?: PtyIncarnationId) => void
   /** Rebind an existing pane after its provider replaces the PTY identity. */
-  onPtyRebind?: (ptyId: string, replacedPtyId: string) => void
+  onPtyRebind?: (ptyId: string, replacedPtyId: string, incarnationId?: PtyIncarnationId) => void
   onBell?: () => void
   onAgentBecameIdle?: (title: string) => void
   onAgentBecameWorking?: () => void
diff --git a/src/renderer/src/components/terminal-pane/remote-runtime-pty-transport-expired-pane-recovery.test.ts b/src/renderer/src/components/terminal-pane/remote-runtime-pty-transport-expired-pane-recovery.test.ts
index 9e529ccb795..a36331ee20c 100644
--- a/src/renderer/src/components/terminal-pane/remote-runtime-pty-transport-expired-pane-recovery.test.ts
+++ b/src/renderer/src/components/terminal-pane/remote-runtime-pty-transport-expired-pane-recovery.test.ts
@@ -93,6 +93,7 @@ describe('createRemoteRuntimePtyTransport', () => {
               tabId: 'host-tab-1',
               leafId: 'pane:1',
               ptyId: 'ssh-private-pty',
+              incarnationId: 'replacement-incarnation',
               worktreeId: 'wt-1'
             }
           }
@@ -126,7 +127,8 @@ describe('createRemoteRuntimePtyTransport', () => {
     expect(latestSubscribePayload()).toMatchObject({ terminal: 'terminal-replacement' })
     expect(onPtyRebind).toHaveBeenCalledWith(
       'remote:hub-env@@terminal-replacement',
-      'remote:hub-env@@terminal-expired'
+      'remote:hub-env@@terminal-expired',
+      'replacement-incarnation'
     )
     expect(onPtyExit).not.toHaveBeenCalled()
     expect(onError).not.toHaveBeenCalled()
diff --git a/src/renderer/src/components/terminal-pane/remote-runtime-pty-transport-pane-handle-resolution.test.ts b/src/renderer/src/components/terminal-pane/remote-runtime-pty-transport-pane-handle-resolution.test.ts
index 283abb2cec4..651825ffe2b 100644
--- a/src/renderer/src/components/terminal-pane/remote-runtime-pty-transport-pane-handle-resolution.test.ts
+++ b/src/renderer/src/components/terminal-pane/remote-runtime-pty-transport-pane-handle-resolution.test.ts
@@ -47,6 +47,7 @@ describe('createRemoteRuntimePtyTransport', () => {
               tabId: 'tab-1',
               leafId,
               ptyId: 'ssh:hub-private@@pty-2',
+              incarnationId: 'hub-incarnation-1',
               worktreeId: 'wt-1',
               executionHostId: 'ssh:hub-private',
               hostPlatform: 'win32'
@@ -57,10 +58,12 @@ describe('createRemoteRuntimePtyTransport', () => {
       throw new Error(`Unexpected method ${request.method}`)
     })
     const { createRemoteRuntimePtyTransport } = await import('./remote-runtime-pty-transport')
+    const onPtySpawn = vi.fn()
     const transport = createRemoteRuntimePtyTransport('hub-env', {
       worktreeId: 'wt-1',
       tabId: 'tab-1',
-      leafId
+      leafId,
+      onPtySpawn
     })
 
     const result = await transport.connect({
@@ -73,9 +76,11 @@ describe('createRemoteRuntimePtyTransport', () => {
 
     expect(result).toEqual({
       id: 'remote:hub-env@@hub-terminal-1',
+      incarnationId: 'hub-incarnation-1',
       replay: '',
       isReattach: true
     })
+    expect(onPtySpawn).toHaveBeenCalledWith('remote:hub-env@@hub-terminal-1', 'hub-incarnation-1')
     expect(transport.getPtyId()).toBe('remote:hub-env@@hub-terminal-1')
     expect(transport.getExecutionHostId?.()).toBe('ssh:hub-private')
     expect(transport.getRemotePlatform?.()).toBe('win32')
diff --git a/src/renderer/src/components/terminal-pane/remote-runtime-pty-transport.ts b/src/renderer/src/components/terminal-pane/remote-runtime-pty-transport.ts
index 16c6b235eac..a9be9c37ce9 100644
--- a/src/renderer/src/components/terminal-pane/remote-runtime-pty-transport.ts
+++ b/src/renderer/src/components/terminal-pane/remote-runtime-pty-transport.ts
@@ -202,6 +202,29 @@ export function createRemoteRuntimePtyTransport(
   let attachGeneration = 0
   let subscriptionGeneration = 0
 
+  function notifyPtySpawnForRemote(
+    id: string,
+    incarnationId?: RuntimeTerminalCreate['incarnationId']
+  ): void {
+    if (incarnationId) {
+      onPtySpawn?.(id, incarnationId)
+    } else {
+      onPtySpawn?.(id)
+    }
+  }
+
+  function notifyPtyRebindForRemote(
+    id: string,
+    replacedId: string,
+    incarnationId?: RuntimeTerminalResolvePane['incarnationId']
+  ): void {
+    if (incarnationId) {
+      onPtyRebind?.(id, replacedId, incarnationId)
+    } else {
+      onPtyRebind?.(id, replacedId)
+    }
+  }
+
   function setAttachmentReady(ready: boolean): void {
     attachmentReady = ready
     if (!ready) {
@@ -832,6 +855,7 @@ export function createRemoteRuntimePtyTransport(
       return undefined
     }
 
+    let resolvedIncarnationId: RuntimeTerminalResolvePane['incarnationId']
     if (leafId && worktreeId && !resolvePaneUnavailable) {
       try {
         const resolved = await callRuntime<{ terminal: RuntimeTerminalResolvePane }>(
@@ -846,6 +870,7 @@ export function createRemoteRuntimePtyTransport(
           (!terminal.worktreeId || terminal.worktreeId === worktreeId)
         ) {
           adoptExecutionMetadata(terminal)
+          resolvedIncarnationId = terminal.incarnationId
         }
       } catch (error) {
         if (error instanceof RuntimeRpcCallError && error.code === 'method_not_found') {
@@ -866,7 +891,7 @@ export function createRemoteRuntimePtyTransport(
       rows: options.rows ?? 24
     }
     if (notifySpawn) {
-      onPtySpawn?.(remotePtyId)
+      notifyPtySpawnForRemote(remotePtyId, resolvedIncarnationId)
     }
 
     try {
@@ -882,6 +907,7 @@ export function createRemoteRuntimePtyTransport(
 
     return {
       id: remotePtyId,
+      ...(resolvedIncarnationId ? { incarnationId: resolvedIncarnationId } : {}),
       replay: '',
       isReattach: true
     } satisfies PtyConnectResult
@@ -1149,7 +1175,7 @@ export function createRemoteRuntimePtyTransport(
       rows: options.rows ?? 24
     }
     if (notifySpawn) {
-      onPtySpawn?.(remotePtyId)
+      notifyPtySpawnForRemote(remotePtyId, terminal.incarnationId)
     }
     emitRecoveryState()
     try {
@@ -1167,7 +1193,12 @@ export function createRemoteRuntimePtyTransport(
     ) {
       return undefined
     }
-    return { id: remotePtyId, replay: '', isReattach: true }
+    return {
+      id: remotePtyId,
+      ...(terminal.incarnationId ? { incarnationId: terminal.incarnationId } : {}),
+      replay: '',
+      isReattach: true
+    }
   }
 
   function recoverExpiredHostPane(): void {
@@ -1199,7 +1230,7 @@ export function createRemoteRuntimePtyTransport(
         if (replacedPtyId && replacedPtyId !== remotePtyId) {
           replaceFitOverridePtyId(replacedPtyId, remotePtyId)
           replaceDriverPtyId(replacedPtyId, remotePtyId)
-          onPtyRebind?.(remotePtyId, replacedPtyId)
+          notifyPtyRebindForRemote(remotePtyId, replacedPtyId, terminal.incarnationId)
         }
         await subscribeToHandle()
       })
@@ -2179,7 +2210,7 @@ export function createRemoteRuntimePtyTransport(
           rows: options.rows ?? 24
         }
         if (createdTerminal.isReattach !== true) {
-          onPtySpawn?.(remotePtyId)
+          notifyPtySpawnForRemote(remotePtyId, createdTerminal.incarnationId)
         }
         emitRecoveryState()
 
@@ -2196,6 +2227,9 @@ export function createRemoteRuntimePtyTransport(
 
         return {
           id: remotePtyId,
+          ...(createdTerminal.incarnationId
+            ? { incarnationId: createdTerminal.incarnationId }
+            : {}),
           replay: '',
           ...(createdTerminal.isReattach === true ? { isReattach: true } : {})
         } satisfies PtyConnectResult
diff --git a/src/renderer/src/components/terminal-pane/terminal-parked-pty-watcher.ts b/src/renderer/src/components/terminal-pane/terminal-parked-pty-watcher.ts
index 1cd049a3878..8811e4ab831 100644
--- a/src/renderer/src/components/terminal-pane/terminal-parked-pty-watcher.ts
+++ b/src/renderer/src/components/terminal-pane/terminal-parked-pty-watcher.ts
@@ -119,6 +119,7 @@ export function startParkedPtyWatcher(args: {
   const initialTitle = state.runtimePaneTitlesByTabId[tab.id]?.[pane.paneId]
   const disposeWatcher = startParkedTerminalByteWatcher({
     ptyId,
+    ...(pane.incarnationId ? { incarnationId: pane.incarnationId } : {}),
     tabId: tab.id,
     worktreeId,
     leafId: pane.leafId,
diff --git a/src/renderer/src/components/terminal-pane/terminal-parked-watcher-reconciliation.ts b/src/renderer/src/components/terminal-pane/terminal-parked-watcher-reconciliation.ts
index 148c71a174d..7d972c4a2c1 100644
--- a/src/renderer/src/components/terminal-pane/terminal-parked-watcher-reconciliation.ts
+++ b/src/renderer/src/components/terminal-pane/terminal-parked-watcher-reconciliation.ts
@@ -70,6 +70,9 @@ export function resolveParkedTerminalPaneCandidates(
           // Why: the fact belongs to the captured PTY; a re-minted id on this leaf is a different shell.
           ...(prior.ptyId === pane.ptyId && prior.untouchedFreshSpawn
             ? { untouchedFreshSpawn: true }
+            : {}),
+          ...(prior.ptyId === pane.ptyId && prior.incarnationId
+            ? { incarnationId: prior.incarnationId }
             : {})
         }
       : pane
diff --git a/src/renderer/src/components/terminal-pane/terminal-parked-watcher-registry.ts b/src/renderer/src/components/terminal-pane/terminal-parked-watcher-registry.ts
index 7e305ac7fe3..5dbb6c0589f 100644
--- a/src/renderer/src/components/terminal-pane/terminal-parked-watcher-registry.ts
+++ b/src/renderer/src/components/terminal-pane/terminal-parked-watcher-registry.ts
@@ -10,9 +10,12 @@
 import { discardPreHandlerPtyState, hasPreHandlerPtyExit } from './pty-pre-handler-buffer'
 import { parseRemoteRuntimePtyId } from '../../../../shared/remote-runtime-pty-id'
 import { FLOATING_TERMINAL_WORKTREE_ID } from '../../../../shared/constants'
+import type { PtyIncarnationId } from '../../../../shared/pty-incarnation'
 
 export type ParkedTerminalPaneCapture = {
   ptyId: string | null
+  /** Process identity carried across the mounted-to-parked handoff. */
+  incarnationId?: PtyIncarnationId | null
   /** PaneManager numeric pane id the live pane used for runtime titles. */
   paneId: number
   /** Stable terminal-layout leaf UUID (paneKey attribution). */
diff --git a/src/renderer/src/components/terminal-pane/use-terminal-pane-lifecycle.ts b/src/renderer/src/components/terminal-pane/use-terminal-pane-lifecycle.ts
index 52a348b627d..cf859332f48 100644
--- a/src/renderer/src/components/terminal-pane/use-terminal-pane-lifecycle.ts
+++ b/src/renderer/src/components/terminal-pane/use-terminal-pane-lifecycle.ts
@@ -1963,10 +1963,17 @@ export function useTerminalPaneLifecycle({
         manager.getPanes().map((capturedPane) => {
           const capturedPtyId = paneTransports.get(capturedPane.id)?.getPtyId() ?? null
           const capturedBinding = panePtyBindings.get(capturedPane.id) as
-            | (IDisposable & { isUntouchedFreshSpawnPty?: (ptyId: string) => boolean })
+            | (IDisposable & {
+                isUntouchedFreshSpawnPty?: (ptyId: string) => boolean
+                getPtyIncarnationId?: (ptyId: string) => string | null
+              })
             | undefined
           return {
             ptyId: capturedPtyId,
+            incarnationId:
+              capturedPtyId !== null
+                ? (capturedBinding?.getPtyIncarnationId?.(capturedPtyId) ?? null)
+                : null,
             paneId: capturedPane.id,
             leafId: capturedPane.leafId,
             drivesTabTitle: manager.getActivePane()?.id === capturedPane.id,
diff --git a/src/shared/runtime-terminal-contracts.ts b/src/shared/runtime-terminal-contracts.ts
index a1692e5f754..1c0f347dcac 100644
--- a/src/shared/runtime-terminal-contracts.ts
+++ b/src/shared/runtime-terminal-contracts.ts
@@ -243,6 +243,8 @@ export type RuntimeTerminalCreate = {
   tabId?: string
   paneKey?: string | null
   ptyId?: string | null
+  /** Opaque process identity behind a reusable PTY id; absence is unknown. */
+  incarnationId?: PtyIncarnationId
   worktreeId: string
   title: string | null
   executionHostId?: ExecutionHostId
@@ -264,6 +266,8 @@ export type RuntimeTerminalResolvePane = {
   tabId: string
   leafId: string
   ptyId: string | null
+  /** Opaque process identity behind a reusable PTY id; absence is unknown. */
+  incarnationId?: PtyIncarnationId
   connected?: boolean
   worktreeId?: string
   executionHostId?: ExecutionHostId