diff --git a/src/renderer/src/stores/fileChangeStore.ts b/src/renderer/src/stores/fileChangeStore.ts
index b59b5ef..9d75dd8 100644
--- a/src/renderer/src/stores/fileChangeStore.ts
+++ b/src/renderer/src/stores/fileChangeStore.ts
@@ -31,6 +31,8 @@ interface AppFileState {
   initialized: boolean;
   /** Original order for each section: key is `${platform}:${fileType}`, value is ordered file IDs */
   originalSectionOrders: Record<string, string[]>;
+  /** Server revision string from Kintone API, used to detect remote changes */
+  serverRevision: string | null;
 }
 
 interface FileChangeState {
@@ -93,6 +95,15 @@ interface FileChangeState {
   hasPendingChanges: (domainId: string, appId: string) => boolean;
 
   isInitialized: (domainId: string, appId: string) => boolean;
+
+  /** Store the revision string from Kintone API */
+  setServerRevision: (domainId: string, appId: string, revision: string) => void;
+
+  /** Get the stored revision string */
+  getServerRevision: (domainId: string, appId: string) => string | null;
+
+  /** Check if the revision has changed (indicating remote modifications) */
+  hasRemoteChange: (domainId: string, appId: string, currentRevision: string) => boolean;
 }
 
 const appKey = (domainId: string, appId: string) => `${domainId}:${appId}`;
@@ -125,7 +136,7 @@ export const useFileChangeStore = create<FileChangeState>()(
         set((state) => ({
           appFiles: {
             ...state.appFiles,
-            [key]: { files: entries, initialized: true, originalSectionOrders },
+            [key]: { files: entries, initialized: true, originalSectionOrders, serverRevision: null },
           },
         }));
       },
@@ -137,6 +148,7 @@ export const useFileChangeStore = create<FileChangeState>()(
             files: [],
             initialized: true,
             originalSectionOrders: {},
+            serverRevision: null,
           };
           return {
             appFiles: {
@@ -244,6 +256,7 @@ export const useFileChangeStore = create<FileChangeState>()(
               files: [],
               initialized: false,
               originalSectionOrders: {},
+              serverRevision: null,
             },
           },
         }));
@@ -295,6 +308,36 @@ export const useFileChangeStore = create<FileChangeState>()(
         const key = appKey(domainId, appId);
         return get().appFiles[key]?.initialized ?? false;
       },
+
+      setServerRevision: (domainId, appId, revision) => {
+        const key = appKey(domainId, appId);
+        set((state) => {
+          const existing = state.appFiles[key] ?? {
+            files: [],
+            initialized: false,
+            originalSectionOrders: {},
+            serverRevision: null,
+          };
+          return {
+            appFiles: {
+              ...state.appFiles,
+              [key]: { ...existing, serverRevision: revision },
+            },
+          };
+        });
+      },
+
+      getServerRevision: (domainId, appId) => {
+        const key = appKey(domainId, appId);
+        return get().appFiles[key]?.serverRevision ?? null;
+      },
+
+      hasRemoteChange: (domainId, appId, currentRevision) => {
+        const key = appKey(domainId, appId);
+        const storedRevision = get().appFiles[key]?.serverRevision;
+        if (storedRevision === null) return false;
+        return storedRevision !== currentRevision;
+      },
     }),
     {
       name: "file-change-storage",