diff --git a/src/renderer/src/runtime/sync-runtime-graph-workspace-publication.test.ts b/src/renderer/src/runtime/sync-runtime-graph-workspace-publication.test.ts
index 823e68d0508..9a5116400c0 100644
--- a/src/renderer/src/runtime/sync-runtime-graph-workspace-publication.test.ts
+++ b/src/renderer/src/runtime/sync-runtime-graph-workspace-publication.test.ts
@@ -52,6 +52,33 @@ describe('buildMobileSessionTabSnapshots', () => {
     expect(restored.snapshotVersion).toBeGreaterThan(initial.snapshotVersion)
   })
 
+  it('publishes a new instance identity when unchanged content is recreated', () => {
+    const worktree = {
+      id: 'wt-1',
+      instanceId: 'old-instance',
+      repoId: 'repo-1'
+    }
+    const base = makeState({
+      worktreesByRepo: { 'repo-1': [worktree] } as unknown as AppState['worktreesByRepo'],
+      tabsByWorktree: {
+        'wt-1': [{ id: 'term-1', title: 'Terminal 1' }]
+      } as unknown as AppState['tabsByWorktree']
+    })
+    const initial = buildMobileSessionTabSnapshots(base)[0]!
+    const recreated = {
+      ...base,
+      worktreesByRepo: {
+        'repo-1': [{ ...worktree, instanceId: 'new-instance' }]
+      } as unknown as AppState['worktreesByRepo']
+    }
+
+    const next = buildMobileSessionTabSnapshots(recreated)[0]!
+
+    expect(initial.worktreeInstanceId).toBe('old-instance')
+    expect(next.worktreeInstanceId).toBe('new-instance')
+    expect(next.snapshotVersion).toBeGreaterThan(initial.snapshotVersion)
+  })
+
   it('publishes browser and editor color + pin state from unified tabs', () => {
     const fileId = '/repo/README.md'
     const state = makeState({
diff --git a/src/renderer/src/runtime/sync-runtime-graph/mobile-session-capture.ts b/src/renderer/src/runtime/sync-runtime-graph/mobile-session-capture.ts
index 921249fb82d..16c556c86d6 100644
--- a/src/renderer/src/runtime/sync-runtime-graph/mobile-session-capture.ts
+++ b/src/renderer/src/runtime/sync-runtime-graph/mobile-session-capture.ts
@@ -157,6 +157,7 @@ export function canReuseMobileSessionSnapshot(
 ): boolean {
   return (
     previous.worktreeId === next.worktreeId &&
+    previous.worktreeInstanceId === next.worktreeInstanceId &&
     previous.terminalTabs === next.terminalTabs &&
     previous.browserWorkspaces === next.browserWorkspaces &&
     previous.unifiedTabs === next.unifiedTabs &&
diff --git a/src/renderer/src/runtime/sync-runtime-graph/mobile-session-inputs.ts b/src/renderer/src/runtime/sync-runtime-graph/mobile-session-inputs.ts
index 16c2f4d0da3..4792c59b824 100644
--- a/src/renderer/src/runtime/sync-runtime-graph/mobile-session-inputs.ts
+++ b/src/renderer/src/runtime/sync-runtime-graph/mobile-session-inputs.ts
@@ -1,6 +1,7 @@
 import type { AppState } from '@/store/types'
 import { parsePaneKey, makePaneKey } from '../../../../shared/stable-pane-id'
 import { nativeChatLaunchAgentForLeaf } from '../../components/native-chat/native-chat-leaf-routing'
+import { getIndexedWorktreesById } from '@/store/worktree-repo-index'
 import {
   EMPTY_NARROWED_BY_KEY,
   EMPTY_WORKTREE_BROWSER_WORKSPACES,
@@ -146,6 +147,9 @@ export function buildMobileSessionWorktreeInputs(
   const activeTabId = state.activeTabId
   return {
     worktreeId,
+    worktreeInstanceId: getIndexedWorktreesById(state.worktreesByRepo, worktreeId).find(
+      (worktree) => worktree.instanceId !== undefined
+    )?.instanceId,
     terminalTabs,
     browserWorkspaces,
     unifiedTabs: state.unifiedTabsByWorktree[worktreeId] ?? EMPTY_WORKTREE_UNIFIED_TABS,
diff --git a/src/renderer/src/runtime/sync-runtime-graph/mobile-session-snapshots.ts b/src/renderer/src/runtime/sync-runtime-graph/mobile-session-snapshots.ts
index 91e89a9cb73..401323a43ca 100644
--- a/src/renderer/src/runtime/sync-runtime-graph/mobile-session-snapshots.ts
+++ b/src/renderer/src/runtime/sync-runtime-graph/mobile-session-snapshots.ts
@@ -208,16 +208,29 @@ export function buildMobileSessionTabSnapshots(
     }
     const candidateVersion = ++graphState.mobileSessionSnapshotVersion
     if (cached && jsonContentEquals(cached.content, content)) {
+      const snapshot =
+        cached.snapshot.worktreeInstanceId === inputs.worktreeInstanceId
+          ? cached.snapshot
+          : {
+              worktree: worktreeId,
+              ...(inputs.worktreeInstanceId
+                ? { worktreeInstanceId: inputs.worktreeInstanceId }
+                : {}),
+              publicationEpoch: mobilePublicationEpoch,
+              snapshotVersion: candidateVersion,
+              ...content
+            }
       graphState.mobileSessionSnapshotCacheByWorktree.set(worktreeId, {
         inputs,
         content,
-        snapshot: cached.snapshot
+        snapshot
       })
-      snapshots.push(cached.snapshot)
+      snapshots.push(snapshot)
       continue
     }
     const snapshot: RuntimeMobileSessionTabsSnapshot = {
       worktree: worktreeId,
+      ...(inputs.worktreeInstanceId ? { worktreeInstanceId: inputs.worktreeInstanceId } : {}),
       publicationEpoch: mobilePublicationEpoch,
       snapshotVersion: candidateVersion,
       ...content
diff --git a/src/renderer/src/runtime/sync-runtime-graph/types.ts b/src/renderer/src/runtime/sync-runtime-graph/types.ts
index 85b1d961d5f..b51b8cd8afa 100644
--- a/src/renderer/src/runtime/sync-runtime-graph/types.ts
+++ b/src/renderer/src/runtime/sync-runtime-graph/types.ts
@@ -107,6 +107,7 @@ export type MountedTerminalSurfaceCapture = {
  */
 export type MobileSessionWorktreeInputs = {
   worktreeId: string
+  worktreeInstanceId: string | undefined
   terminalTabs: AppState['tabsByWorktree'][string]
   browserWorkspaces: AppState['browserTabsByWorktree'][string]
   unifiedTabs: AppState['unifiedTabsByWorktree'][string]
diff --git a/src/shared/runtime-session-contracts.ts b/src/shared/runtime-session-contracts.ts
index cd0dd7a5cc7..17fe75d5108 100644
--- a/src/shared/runtime-session-contracts.ts
+++ b/src/shared/runtime-session-contracts.ts
@@ -215,6 +215,8 @@ export const UNPUBLISHED_WORKTREE_PUBLICATION_EPOCH = 'none'
 
 export type RuntimeMobileSessionTabsSnapshot = {
   worktree: string
+  /** Immutable catalog identity used to fence snapshots across path reuse. */
+  worktreeInstanceId?: string
   publicationEpoch: string
   snapshotVersion: number
   activeGroupId: string | null