diff --git a/esbuild.config.mjs b/esbuild.config.mjs
index a26b433..3f92f32 100644
--- a/esbuild.config.mjs
+++ b/esbuild.config.mjs
@@ -1,13 +1,30 @@
 import esbuild from "esbuild";
+import { readFile } from "node:fs/promises";
 
 const production = process.argv.includes("production");
 
+const emptyNodeEnvPlugin = {
+  name: "empty-node-env",
+  setup(build) {
+    build.onLoad({ filter: /node_modules[\\/]lib0[\\/](environment|storage)\.js$/ }, async (args) => {
+      const source = await readFile(args.path, "utf8");
+      return {
+        contents: source
+          .replaceAll("process.env", "({})")
+          .replaceAll("localStorage", "undefined"),
+        loader: "js"
+      };
+    });
+  }
+};
+
 const context = await esbuild.context({
   entryPoints: ["src/main.ts"],
   bundle: true,
   external: ["obsidian", "electron", "@codemirror/state", "@codemirror/view", "@codemirror/commands"],
   format: "cjs",
   target: "es2020",
+  plugins: [emptyNodeEnvPlugin],
   logLevel: "info",
   sourcemap: production ? false : "inline",
   treeShaking: true,
diff --git a/manifest.json b/manifest.json
index e2a5743..6f4e985 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,10 +1,10 @@
-{
-  "id": "shared-vault",
-  "name": "Shared Vault",
-  "version": "0.1.0",
-  "minAppVersion": "1.5.0",
-  "description": "Serverless, conflict-free collaboration layer for Obsidian shared vaults.",
-  "author": "fangface",
-  "authorUrl": "https://github.com/fangface-hub",
-  "isDesktopOnly": true
-}
\ No newline at end of file
+{
+  "id": "shared-vault",
+  "name": "Shared Vault",
+  "version": "0.1.1",
+  "minAppVersion": "1.5.0",
+  "description": "Serverless, conflict-free collaboration layer for shared vaults.",
+  "author": "fangface",
+  "authorUrl": "https://github.com/fangface-hub",
+  "isDesktopOnly": true
+}
diff --git a/package-lock.json b/package-lock.json
index 21fab59..ed0b896 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "obsidian-shared-vault",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "obsidian-shared-vault",
-      "version": "0.1.0",
+      "version": "0.1.1",
       "dependencies": {
         "diff-match-patch": "latest",
         "yjs": "latest"
diff --git a/package.json b/package.json
index 1d59f18..ba20f6e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "obsidian-shared-vault",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "description": "Serverless conflict-free collaboration layer for Obsidian shared vaults.",
   "private": true,
   "type": "module",
@@ -29,4 +29,4 @@
     "diff-match-patch": "latest",
     "yjs": "latest"
   }
-}
\ No newline at end of file
+}
diff --git a/src/shared-vault-config.ts b/src/shared-vault-config.ts
index af8a511..270c7e2 100644
--- a/src/shared-vault-config.ts
+++ b/src/shared-vault-config.ts
@@ -5,13 +5,8 @@ export const DEFAULT_CACHE_TTL_DAYS = 30;
 export const DAY_IN_MS = 24 * 60 * 60 * 1000;
 export const NODE_REGISTRY_DIR = "node-registry";
 
-export function getDefaultUserId(): string {
-  const loginUserId = process.env.USERNAME?.trim() || process.env.USER?.trim() || process.env.LOGNAME?.trim();
-  return loginUserId && loginUserId.length > 0 ? loginUserId : FALLBACK_USER_ID;
-}
-
 export const DEFAULT_SETTINGS: SharedVaultSettings = {
-  userId: getDefaultUserId(),
+  userId: FALLBACK_USER_ID,
   autoSyncIntervalSec: 15,
   cacheTtlDays: DEFAULT_CACHE_TTL_DAYS,
   operationCacheDir: "operation-cache",
diff --git a/src/shared-vault-plugin.ts b/src/shared-vault-plugin.ts
index c3db1aa..0cd4512 100644
--- a/src/shared-vault-plugin.ts
+++ b/src/shared-vault-plugin.ts
@@ -6,8 +6,6 @@ import { SharedVaultSettingTab } from "./shared-vault-settings-tab";
 import type { NodeListEntry, NodeRegistryEntry, OperationFile, SharedVaultData, SharedVaultSettings } from "./shared-vault-types";
 import { hashText, safeMkdir } from "./shared-vault-utils";
 
-const LOCAL_DATA_KEY_PREFIX = "shared-vault:data";
-
 export default class SharedVaultPlugin extends Plugin {
   settings: SharedVaultSettings = DEFAULT_SETTINGS;
   data!: SharedVaultData;
@@ -97,7 +95,7 @@ export default class SharedVaultPlugin extends Plugin {
       ...this.settings,
       userId: nextUserId
     };
-    this.saveLocalPluginData(this.data);
+    await this.saveLocalPluginData(this.data);
 
     if (previousUserId !== nextUserId) {
       await this.migrateUserCache(previousUserId, nextUserId);
@@ -122,7 +120,7 @@ export default class SharedVaultPlugin extends Plugin {
   }
 
   private async loadPluginData(): Promise<SharedVaultData> {
-    const localRaw = this.loadLocalPluginData();
+    const localRaw = await this.loadLocalPluginData();
     const sharedRaw = (await this.loadData()) as Partial<SharedVaultData> | null;
     const raw = {
       ...sharedRaw,
@@ -142,31 +140,37 @@ export default class SharedVaultPlugin extends Plugin {
     };
 
     if (!localRaw) {
-      this.saveLocalPluginData(data);
+      await this.saveLocalPluginData(data);
     }
 
     return data;
   }
 
-  private loadLocalPluginData(): Partial<SharedVaultData> | null {
-    const raw = window.localStorage.getItem(this.getLocalDataKey());
-    if (!raw) {
+  private async loadLocalPluginData(): Promise<Partial<SharedVaultData> | null> {
+    const path = this.getLocalDataPath();
+    if (!(await this.app.vault.adapter.exists(path))) {
       return null;
     }
 
     try {
+      const raw = await this.app.vault.adapter.read(path);
       return JSON.parse(raw) as Partial<SharedVaultData>;
     } catch {
       return null;
     }
   }
 
-  private saveLocalPluginData(data: SharedVaultData): void {
-    window.localStorage.setItem(this.getLocalDataKey(), JSON.stringify(data));
+  private async saveLocalPluginData(data: SharedVaultData): Promise<void> {
+    await safeMkdir(this, this.getLocalDataDir());
+    await this.app.vault.adapter.write(this.getLocalDataPath(), JSON.stringify(data, null, 2));
   }
 
-  private getLocalDataKey(): string {
-    return `${LOCAL_DATA_KEY_PREFIX}:${this.manifest.id}:${this.vaultId}`;
+  private getLocalDataDir(): string {
+    return normalizePath(`${this.app.vault.configDir}/cache/${this.vaultId}`);
+  }
+
+  private getLocalDataPath(): string {
+    return normalizePath(`${this.getLocalDataDir()}/local-plugin-data.json`);
   }
 
   private createEngine(userId: string): SharedVaultEngine {
diff --git a/versions.json b/versions.json
index a3e3788..fc3147a 100644
--- a/versions.json
+++ b/versions.json
@@ -1,3 +1,4 @@
-{
-  "0.1.0": "1.5.0"
-}
\ No newline at end of file
+{
+  "0.1.0": "1.5.0",
+  "0.1.1": "1.5.0"
+}