diff --git a/dist/commands.js b/dist/commands.js
index 1bf4435..cff3424 100644
--- a/dist/commands.js
+++ b/dist/commands.js
@@ -35,6 +35,54 @@ var __importStar = (this && this.__importStar) || (function () {
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.registerCommands = registerCommands;
 const vscode = __importStar(require("vscode"));
+// 查找已打开的文档
+function findExistingDocument(filePath) {
+    const documents = vscode.workspace.textDocuments;
+    for (const doc of documents) {
+        if (doc.uri.scheme === 'squirrel' && doc.uri.path === `/${filePath}`) {
+            return doc;
+        }
+    }
+    return undefined;
+}
+// 打开文件的通用函数
+async function openFile(model, provider, entry) {
+    if (!model.getIsConnected()) {
+        vscode.window.showErrorMessage('请先连接到 pvfUtility API');
+        return;
+    }
+    // 检查是否已经有相同的文件打开
+    const existingDocument = findExistingDocument(entry.key);
+    if (existingDocument) {
+        // 如果文件已打开，则聚焦到该标签页
+        await vscode.window.showTextDocument(existingDocument);
+        return;
+    }
+    // 如果文件未打开，则在新标签页中打开
+    try {
+        await vscode.window.withProgress({
+            location: vscode.ProgressLocation.Notification,
+            title: `正在加载文件 ${entry.name}...`,
+            cancellable: false
+        }, async (progress) => {
+            const content = await model.getFileContent(entry.key);
+            if (content !== undefined) {
+                // 创建虚拟文档，使用时间戳确保URI唯一以支持多标签页
+                const timestamp = Date.now();
+                const uri = vscode.Uri.parse(`squirrel:/${entry.key}?instance=${timestamp}`);
+                const doc = await vscode.workspace.openTextDocument(uri);
+                await vscode.window.showTextDocument(doc, { preview: false });
+                provider.refresh();
+            }
+            else {
+                vscode.window.showErrorMessage(`加载文件 ${entry.name} 失败`);
+            }
+        });
+    }
+    catch (error) {
+        vscode.window.showErrorMessage(`打开文件失败: ${error}`);
+    }
+}
 function registerCommands(context, model, provider, functionExtractor, output) {
     // 连接到 API
     console.log('注册 squirrel.connectToApi 命令...');
@@ -95,34 +143,9 @@ function registerCommands(context, model, provider, functionExtractor, output) {
             vscode.window.showErrorMessage(`刷新失败: ${error}`);
         }
     });
-    // 打开文件
+    // 打开文件（单击或双击文件时调用）
     const openFileCommand = vscode.commands.registerCommand('squirrel.openFile', async (entry) => {
-        if (!model.getIsConnected()) {
-            vscode.window.showErrorMessage('请先连接到 pvfUtility API');
-            return;
-        }
-        try {
-            await vscode.window.withProgress({
-                location: vscode.ProgressLocation.Notification,
-                title: `正在加载文件 ${entry.name}...`,
-                cancellable: false
-            }, async (progress) => {
-                const content = await model.getFileContent(entry.key);
-                if (content !== undefined) {
-                    // 创建虚拟文档
-                    const uri = vscode.Uri.parse(`squirrel:/${entry.key}`);
-                    const doc = await vscode.workspace.openTextDocument(uri);
-                    await vscode.window.showTextDocument(doc);
-                    provider.refresh();
-                }
-                else {
-                    vscode.window.showErrorMessage(`加载文件 ${entry.name} 失败`);
-                }
-            });
-        }
-        catch (error) {
-            vscode.window.showErrorMessage(`打开文件失败: ${error}`);
-        }
+        await openFile(model, provider, entry);
     });
     // 保存文件（通过 VS Code 的保存事件处理，这个命令主要用于显示）
     const saveFileCommand = vscode.commands.registerCommand('squirrel.saveFile', async () => {
diff --git a/dist/commands.js.map b/dist/commands.js.map
index f024fd5..3e4e339 100644
--- a/dist/commands.js.map
+++ b/dist/commands.js.map
@@ -1 +1 @@
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\ No newline at end of file
+{"version":3,"file":"commands.js","sourceRoot":"","sources":["../src/commands.ts"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;AAwDA,4CAuEC;AA/HD,+CAAiC;AAKjC,WAAW;AACX,SAAS,oBAAoB,CAAC,QAAgB;IAC1C,MAAM,SAAS,GAAG,MAAM,CAAC,SAAS,CAAC,aAAa,CAAC;IACjD,KAAK,MAAM,GAAG,IAAI,SAAS,EAAE,CAAC;QAC1B,IAAI,GAAG,CAAC,GAAG,CAAC,MAAM,KAAK,UAAU,IAAI,GAAG,CAAC,GAAG,CAAC,IAAI,KAAK,IAAI,QAAQ,EAAE,EAAE,CAAC;YACnE,OAAO,GAAG,CAAC;QACf,CAAC;IACL,CAAC;IACD,OAAO,SAAS,CAAC;AACrB,CAAC;AAED,YAAY;AACZ,KAAK,UAAU,QAAQ,CAAC,KAAgB,EAAE,QAAsB,EAAE,KAAgB;IAC9E,IAAI,CAAC,KAAK,CAAC,cAAc,EAAE,EAAE,CAAC;QAC1B,MAAM,CAAC,MAAM,CAAC,gBAAgB,CAAC,sBAAsB,CAAC,CAAC;QACvD,OAAO;IACX,CAAC;IAED,iBAAiB;IACjB,MAAM,gBAAgB,GAAG,oBAAoB,CAAC,KAAK,CAAC,GAAG,CAAC,CAAC;IACzD,IAAI,gBAAgB,EAAE,CAAC;QACnB,mBAAmB;QACnB,MAAM,MAAM,CAAC,MAAM,CAAC,gBAAgB,CAAC,gBAAgB,CAAC,CAAC;QACvD,OAAO;IACX,CAAC;IAED,oBAAoB;IACpB,IAAI,CAAC;QACD,MAAM,MAAM,CAAC,MAAM,CAAC,YAAY,CAAC;YAC7B,QAAQ,EAAE,MAAM,CAAC,gBAAgB,CAAC,YAAY;YAC9C,KAAK,EAAE,UAAU,KAAK,CAAC,IAAI,KAAK;YAChC,WAAW,EAAE,KAAK;SACrB,EAAE,KAAK,EAAE,QAAQ,EAAE,EAAE;YAClB,MAAM,OAAO,GAAG,MAAM,KAAK,CAAC,cAAc,CAAC,KAAK,CAAC,GAAG,CAAC,CAAC;YAEtD,IAAI,OAAO,KAAK,SAAS,EAAE,CAAC;gBACxB,6BAA6B;gBAC7B,MAAM,SAAS,GAAG,IAAI,CAAC,GAAG,EAAE,CAAC;gBAC7B,MAAM,GAAG,GAAG,MAAM,CAAC,GAAG,CAAC,KAAK,CAAC,aAAa,KAAK,CAAC,GAAG,aAAa,SAAS,EAAE,CAAC,CAAC;gBAC7E,MAAM,GAAG,GAAG,MAAM,MAAM,CAAC,SAAS,CAAC,gBAAgB,CAAC,GAAG,CAAC,CAAC;gBACzD,MAAM,MAAM,CAAC,MAAM,CAAC,gBAAgB,CAAC,GAAG,EAAE,EAAE,OAAO,EAAE,KAAK,EAAE,CAAC,CAAC;gBAC9D,QAAQ,CAAC,OAAO,EAAE,CAAC;YACvB,CAAC;iBAAM,CAAC;gBACJ,MAAM,CAAC,MAAM,CAAC,gBAAgB,CAAC,QAAQ,KAAK,CAAC,IAAI,KAAK,CAAC,CAAC;YAC5D,CAAC;QACL,CAAC,CAAC,CAAC;IACP,CAAC;IAAC,OAAO,KAAK,EAAE,CAAC;QACb,MAAM,CAAC,MAAM,CAAC,gBAAgB,CAAC,WAAW,KAAK,EAAE,CAAC,CAAC;IACvD,CAAC;AACL,CAAC;AAED,SAAgB,gBAAgB,CAAC,OAAgC,EAAE,KAAgB,EAAE,QAAsB,EAAE,iBAAoC,EAAE,MAA6B;IAC5K,UAAU;IACV,OAAO,CAAC,GAAG,CAAC,gCAAgC,CAAC,CAAC;IAC9C,MAAM,cAAc,GAAG,MAAM,CAAC,QAAQ,CAAC,eAAe,CAAC,uBAAuB,EAAE,KAAK,IAAI,EAAE;QACvF,IAAI,CAAC;YACD,MAAM,MAAM,CAAC,MAAM,CAAC,YAAY,CAAC;gBAC7B,QAAQ,EAAE,MAAM,CAAC,gBAAgB,CAAC,YAAY;gBAC9C,KAAK,EAAE,yBAAyB;gBAChC,WAAW,EAAE,KAAK;aACrB,EAAE,KAAK,EAAE,QAAQ,EAAE,EAAE;gBAClB,MAAM,OAAO,GAAG,MAAM,KAAK,CAAC,OAAO,EAAE,CAAC;gBACtC,IAAI,OAAO,EAAE,CAAC;oBACV,MAAM,CAAC,MAAM,CAAC,sBAAsB,CAAC,sBAAsB,CAAC,CAAC;oBAC7D,QAAQ,CAAC,OAAO,EAAE,CAAC;oBAEnB,uBAAuB;oBACvB,OAAO,CAAC,GAAG,CAAC,mBAAmB,CAAC,CAAC;oBACjC,MAAM,MAAM,CAAC,MAAM,CAAC,YAAY,CAAC;wBAC7B,QAAQ,EAAE,MAAM,CAAC,gBAAgB,CAAC,YAAY;wBAC9C,KAAK,EAAE,aAAa;wBACpB,WAAW,EAAE,KAAK;qBACrB,EAAE,KAAK,EAAE,QAAQ,EAAE,EAAE;wBAClB,MAAM,iBAAiB,CAAC,mBAAmB,CAAC,KAAK,CAAC,CAAC;wBACnD,MAAM,CAAC,MAAM,CAAC,sBAAsB,CAAC,UAAU,CAAC,CAAC;oBACrD,CAAC,CAAC,CAAC;gBACP,CAAC;qBAAM,CAAC;oBACJ,MAAM,CAAC,MAAM,CAAC,gBAAgB,CAAC,uBAAuB,CAAC,CAAC;gBAC5D,CAAC;YACL,CAAC,CAAC,CAAC;QACP,CAAC;QAAC,OAAO,KAAK,EAAE,CAAC;YACb,MAAM,CAAC,MAAM,CAAC,gBAAgB,CAAC,SAAS,KAAK,EAAE,CAAC,CAAC;QACrD,CAAC;IACL,CAAC,CAAC,CAAC;IAEH,SAAS;IACT,MAAM,cAAc,GAAG,MAAM,CAAC,QAAQ,CAAC,eAAe,CAAC,uBAAuB,EAAE,KAAK,IAAI,EAAE;QACvF,IAAI,CAAC,KAAK,CAAC,cAAc,EAAE,EAAE,CAAC;YAC1B,MAAM,CAAC,MAAM,CAAC,gBAAgB,CAAC,sBAAsB,CAAC,CAAC;YACvD,OAAO;QACX,CAAC;QAED,IAAI,CAAC;YACD,MAAM,MAAM,CAAC,MAAM,CAAC,YAAY,CAAC;gBAC7B,QAAQ,EAAE,MAAM,CAAC,gBAAgB,CAAC,YAAY;gBAC9C,KAAK,EAAE,aAAa;gBACpB,WAAW,EAAE,KAAK;aACrB,EAAE,KAAK,EAAE,QAAQ,EAAE,EAAE;gBAClB,MAAM,OAAO,GAAG,MAAM,KAAK,CAAC,OAAO,EAAE,CAAC;gBACtC,IAAI,OAAO,EAAE,CAAC;oBACV,MAAM,CAAC,MAAM,CAAC,sBAAsB,CAAC,UAAU,CAAC,CAAC;oBACjD,QAAQ,CAAC,OAAO,EAAE,CAAC;gBACvB,CAAC;qBAAM,CAAC;oBACJ,MAAM,CAAC,MAAM,CAAC,gBAAgB,CAAC,UAAU,CAAC,CAAC;gBAC/C,CAAC;YACL,CAAC,CAAC,CAAC;QACP,CAAC;QAAC,OAAO,KAAK,EAAE,CAAC;YACb,MAAM,CAAC,MAAM,CAAC,gBAAgB,CAAC,SAAS,KAAK,EAAE,CAAC,CAAC;QACrD,CAAC;IACL,CAAC,CAAC,CAAC;IAEH,mBAAmB;IACnB,MAAM,eAAe,GAAG,MAAM,CAAC,QAAQ,CAAC,eAAe,CAAC,mBAAmB,EAAE,KAAK,EAAE,KAAgB,EAAE,EAAE;QACpG,MAAM,QAAQ,CAAC,KAAK,EAAE,QAAQ,EAAE,KAAK,CAAC,CAAC;IAC3C,CAAC,CAAC,CAAC;IAEH,sCAAsC;IACtC,MAAM,eAAe,GAAG,MAAM,CAAC,QAAQ,CAAC,eAAe,CAAC,mBAAmB,EAAE,KAAK,IAAI,EAAE;QACpF,MAAM,CAAC,MAAM,CAAC,sBAAsB,CAAC,+BAA+B,CAAC,CAAC;IAC1E,CAAC,CAAC,CAAC;IAEH,OAAO,CAAC,aAAa,CAAC,IAAI,CAAC,cAAc,EAAE,cAAc,EAAE,eAAe,EAAE,eAAe,CAAC,CAAC;AACjG,CAAC"}
\ No newline at end of file
diff --git a/dist/extension.js b/dist/extension.js
index f2abe9a..028e7e0 100644
--- a/dist/extension.js
+++ b/dist/extension.js
@@ -112,6 +112,8 @@ function activate(context) {
     vscode.workspace.registerFileSystemProvider('squirrel', fileSystemProvider, {
         isCaseSensitive: true
     });
+    // 将 fileSystemProvider 添加到 context 以便在 commands 中使用
+    global.fileSystemProvider = fileSystemProvider;
     // 注册所有命令
     console.log('正在注册命令...');
     (0, commands_1.registerCommands)(context, model, provider, functionExtractor, output);
@@ -139,7 +141,13 @@ function activate(context) {
             }
         }
     });
-    context.subscriptions.push(configChangeListener, saveListener);
+    // 注册文件关闭事件以清理缓存
+    const closeListener = vscode.workspace.onDidCloseTextDocument((doc) => {
+        if (doc.uri.scheme === 'squirrel') {
+            fileSystemProvider.clearFileCache(doc.uri);
+        }
+    });
+    context.subscriptions.push(configChangeListener, saveListener, closeListener);
     output.appendLine('[Squirrel] 扩展激活完成');
     output.show();
     // 显示欢迎信息
diff --git a/dist/extension.js.map b/dist/extension.js.map
index aba9432..50aa0b6 100644
--- a/dist/extension.js.map
+++ b/dist/extension.js.map
@@ -1 +1 @@
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\ No newline at end of file
+{"version":3,"file":"extension.js","sourceRoot":"","sources":["../src/extension.ts"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;AAcA,4BAwJC;AAED,gCAEC;AA1KD,+CAAiC;AACjC,mCAAoC;AACpC,yCAA0C;AAC1C,6DAAkE;AAClE,yCAA8C;AAC9C,2DAAwD;AACxD,uEAA2F;AAC3F,6DAA0D;AAC1D,uEAAoE;AACpE,6EAA0E;AAC1E,mFAAgF;AAChF,uFAAoF;AACpF,qEAAkE;AAElE,SAAgB,QAAQ,CAAC,OAAgC;IACrD,OAAO,CAAC,GAAG,CAAC,+BAA+B,CAAC,CAAC;IAE7C,WAAW;IACX,MAAM,KAAK,GAAG,IAAI,iBAAS,EAAE,CAAC;IAC9B,MAAM,QAAQ,GAAG,IAAI,uBAAY,CAAC,KAAK,CAAC,CAAC;IACzC,MAAM,iBAAiB,GAAG,IAAI,qCAAiB,EAAE,CAAC;IAClD,MAAM,MAAM,GAAG,MAAM,CAAC,MAAM,CAAC,mBAAmB,CAAC,UAAU,CAAC,CAAC;IAE7D,YAAY;IACZ,MAAM,kBAAkB,GAAG,IAAI,uCAAkB,CAAC,iBAAiB,CAAC,eAAe,EAAE,CAAC,CAAC;IACvF,MAAM,qBAAqB,GAAG,IAAI,0CAAqB,EAAE,CAAC;IAE1D,YAAY;IACZ,MAAM,aAAa,GAAG,IAAI,6BAAa,CAAC,iBAAiB,CAAC,eAAe,EAAE,CAAC,CAAC;IAE7E,YAAY;IACZ,MAAM,kBAAkB,GAAG,IAAI,uCAAkB,CAAC,iBAAiB,CAAC,eAAe,EAAE,CAAC,CAAC;IAEvF,YAAY;IACZ,MAAM,qBAAqB,GAAG,IAAI,6CAAqB,CAAC,iBAAiB,CAAC,eAAe,EAAE,CAAC,CAAC;IAE7F,cAAc;IACd,MAAM,wBAAwB,GAAG,IAAI,mDAAwB,EAAE,CAAC;IAEhE,aAAa;IACb,MAAM,0BAA0B,GAAG,IAAI,uDAA0B,EAAE,CAAC;IAEpE,cAAc;IACd,MAAM,iBAAiB,GAAG,IAAI,qCAAiB,EAAE,CAAC;IAClD,MAAM,oBAAoB,GAAG,MAAM,CAAC,SAAS,CAAC,0BAA0B,CAAC,UAAU,CAAC,CAAC;IAErF,YAAY;IACZ,MAAM,CAAC,MAAM,CAAC,wBAAwB,CAAC,sBAAsB,EAAE,QAAQ,CAAC,CAAC;IAEzE,YAAY;IACZ,OAAO,CAAC,aAAa,CAAC,IAAI,CACtB,MAAM,CAAC,SAAS,CAAC,8BAA8B,CAAC,UAAU,EAAE,kBAAkB,EAAE,EAAE,CAAC,EACnF,MAAM,CAAC,SAAS,CAAC,8BAA8B,CAAC,UAAU,EAAE,qBAAqB,EAAE,GAAG,CAAC,CAC1F,CAAC;IAEF,YAAY;IACZ,OAAO,CAAC,aAAa,CAAC,IAAI,CACtB,MAAM,CAAC,SAAS,CAAC,qBAAqB,CAAC,UAAU,EAAE,aAAa,CAAC,CACpE,CAAC;IAEF,YAAY;IACZ,OAAO,CAAC,aAAa,CAAC,IAAI,CACtB,MAAM,CAAC,SAAS,CAAC,0BAA0B,CAAC,UAAU,EAAE,kBAAkB,CAAC,CAC9E,CAAC;IAEF,YAAY;IACZ,OAAO,CAAC,aAAa,CAAC,IAAI,CACtB,MAAM,CAAC,SAAS,CAAC,6BAA6B,CAAC,UAAU,EAAE,qBAAqB,EAAE,GAAG,EAAE,GAAG,CAAC,CAC9F,CAAC;IAEF,cAAc;IACd,OAAO,CAAC,aAAa,CAAC,IAAI,CACtB,MAAM,CAAC,SAAS,CAAC,oCAAoC,CAAC,UAAU,EAAE,wBAAwB,EAAE,GAAG,EAAE,GAAG,EAAE,GAAG,CAAC,CAC7G,CAAC;IAEF,aAAa;IACb,OAAO,CAAC,aAAa,CAAC,IAAI,CACtB,MAAM,CAAC,SAAS,CAAC,sCAAsC,CAAC,UAAU,EAAE,0BAA0B,CAAC,CAClG,CAAC;IAEF,cAAc;IACd,OAAO,CAAC,aAAa,CAAC,IAAI,CACtB,MAAM,CAAC,SAAS,CAAC,2BAA2B,CAAC,UAAU,EAAE,iBAAiB,CAAC,EAC3E,oBAAoB,CACvB,CAAC;IAEF,YAAY;IACZ,OAAO,CAAC,aAAa,CAAC,IAAI,CACtB,MAAM,CAAC,SAAS,CAAC,uBAAuB,CAAC,KAAK,CAAC,EAAE;QAC7C,IAAI,KAAK,CAAC,QAAQ,CAAC,UAAU,KAAK,UAAU,EAAE,CAAC;YAC3C,qCAAiB,CAAC,kBAAkB,CAAC,KAAK,CAAC,QAAQ,EAAE,oBAAoB,CAAC,CAAC;QAC/E,CAAC;IACL,CAAC,CAAC,EACF,MAAM,CAAC,MAAM,CAAC,2BAA2B,CAAC,MAAM,CAAC,EAAE;QAC/C,IAAI,MAAM,IAAI,MAAM,CAAC,QAAQ,CAAC,UAAU,KAAK,UAAU,EAAE,CAAC;YACtD,qCAAiB,CAAC,kBAAkB,CAAC,MAAM,CAAC,QAAQ,EAAE,oBAAoB,CAAC,CAAC;QAChF,CAAC;IACL,CAAC,CAAC,EACF,MAAM,CAAC,SAAS,CAAC,qBAAqB,CAAC,QAAQ,CAAC,EAAE;QAC9C,IAAI,QAAQ,CAAC,UAAU,KAAK,UAAU,EAAE,CAAC;YACrC,qCAAiB,CAAC,kBAAkB,CAAC,QAAQ,EAAE,oBAAoB,CAAC,CAAC;QACzE,CAAC;IACL,CAAC,CAAC,CACL,CAAC;IAEF,0BAA0B;IAC1B,MAAM,CAAC,SAAS,CAAC,aAAa,CAAC,OAAO,CAAC,QAAQ,CAAC,EAAE;QAC9C,IAAI,QAAQ,CAAC,UAAU,KAAK,UAAU,EAAE,CAAC;YACrC,qCAAiB,CAAC,kBAAkB,CAAC,QAAQ,EAAE,oBAAoB,CAAC,CAAC;QACzE,CAAC;IACL,CAAC,CAAC,CAAC;IAEH,YAAY;IACZ,MAAM,kBAAkB,GAAG,IAAI,+CAA0B,CAAC,KAAK,CAAC,CAAC;IACjE,MAAM,CAAC,SAAS,CAAC,0BAA0B,CAAC,UAAU,EAAE,kBAAkB,EAAE;QACxE,eAAe,EAAE,IAAI;KACxB,CAAC,CAAC;IAEH,oDAAoD;IACnD,MAAc,CAAC,kBAAkB,GAAG,kBAAkB,CAAC;IAExD,SAAS;IACT,OAAO,CAAC,GAAG,CAAC,WAAW,CAAC,CAAC;IACzB,IAAA,2BAAgB,EAAC,OAAO,EAAE,KAAK,EAAE,QAAQ,EAAE,iBAAiB,EAAE,MAAM,CAAC,CAAC;IACtE,OAAO,CAAC,GAAG,CAAC,QAAQ,CAAC,CAAC;IAEtB,cAAc;IACd,MAAM,oBAAoB,GAAG,MAAM,CAAC,SAAS,CAAC,wBAAwB,CAAC,CAAC,CAAC,EAAE,EAAE;QACzE,IAAI,CAAC,CAAC,oBAAoB,CAAC,UAAU,CAAC,EAAE,CAAC;YACrC,KAAK,CAAC,YAAY,EAAE,CAAC;YACrB,MAAM,CAAC,UAAU,CAAC,kBAAkB,CAAC,CAAC;QAC1C,CAAC;IACL,CAAC,CAAC,CAAC;IAEH,WAAW;IACX,MAAM,YAAY,GAAG,MAAM,CAAC,SAAS,CAAC,qBAAqB,CAAC,KAAK,EAAE,GAAG,EAAE,EAAE;QACtE,IAAI,GAAG,CAAC,GAAG,CAAC,MAAM,KAAK,UAAU,EAAE,CAAC;YAChC,MAAM,QAAQ,GAAG,GAAG,CAAC,GAAG,CAAC,IAAI,CAAC,SAAS,CAAC,CAAC,CAAC,CAAC,CAAC,YAAY;YACxD,MAAM,OAAO,GAAG,MAAM,KAAK,CAAC,eAAe,CAAC,QAAQ,EAAE,GAAG,CAAC,OAAO,EAAE,CAAC,CAAC;YAErE,IAAI,OAAO,EAAE,CAAC;gBACV,MAAM,CAAC,UAAU,CAAC,iBAAiB,QAAQ,OAAO,CAAC,CAAC;gBACpD,QAAQ,CAAC,OAAO,EAAE,CAAC;gBAEnB,SAAS;gBACT,MAAM,iBAAiB,CAAC,eAAe,CAAC,KAAK,EAAE,QAAQ,CAAC,CAAC;YAC7D,CAAC;iBAAM,CAAC;gBACJ,MAAM,CAAC,UAAU,CAAC,iBAAiB,QAAQ,OAAO,CAAC,CAAC;YACxD,CAAC;QACL,CAAC;IACL,CAAC,CAAC,CAAC;IAEH,gBAAgB;IAChB,MAAM,aAAa,GAAG,MAAM,CAAC,SAAS,CAAC,sBAAsB,CAAC,CAAC,GAAG,EAAE,EAAE;QAClE,IAAI,GAAG,CAAC,GAAG,CAAC,MAAM,KAAK,UAAU,EAAE,CAAC;YAChC,kBAAkB,CAAC,cAAc,CAAC,GAAG,CAAC,GAAG,CAAC,CAAC;QAC/C,CAAC;IACL,CAAC,CAAC,CAAC;IAEH,OAAO,CAAC,aAAa,CAAC,IAAI,CAAC,oBAAoB,EAAE,YAAY,EAAE,aAAa,CAAC,CAAC;IAE9E,MAAM,CAAC,UAAU,CAAC,mBAAmB,CAAC,CAAC;IACvC,MAAM,CAAC,IAAI,EAAE,CAAC;IAEd,SAAS;IACT,MAAM,CAAC,MAAM,CAAC,sBAAsB,CAAC,uDAAuD,CAAC,CAAC;AAClG,CAAC;AAED,SAAgB,UAAU;IACtB,OAAO,CAAC,GAAG,CAAC,+BAA+B,CAAC,CAAC;AACjD,CAAC"}
\ No newline at end of file
diff --git a/dist/fileSystemProvider.js b/dist/fileSystemProvider.js
index dbdb6fb..414ed08 100644
--- a/dist/fileSystemProvider.js
+++ b/dist/fileSystemProvider.js
@@ -39,21 +39,35 @@ class SquirrelFileSystemProvider {
     constructor(model) {
         this._onDidChangeFile = new vscode.EventEmitter();
         this.onDidChangeFile = this._onDidChangeFile.event;
+        // 存储文件实例内容，支持多标签页
+        this.fileContentCache = new Map();
         this.model = model;
     }
     // 读取文件
     async readFile(uri) {
         const filePath = this.getPathFromUri(uri);
+        // 检查是否有缓存的内容（用于多标签页支持）
+        const cacheKey = uri.toString();
+        if (this.fileContentCache.has(cacheKey)) {
+            const content = this.fileContentCache.get(cacheKey);
+            return new TextEncoder().encode(content);
+        }
+        // 从模型获取内容
         const content = await this.model.getFileContent(filePath);
         if (content === undefined) {
             throw vscode.FileSystemError.FileNotFound(uri);
         }
+        // 缓存内容以支持多标签页
+        this.fileContentCache.set(cacheKey, content);
         return new TextEncoder().encode(content);
     }
     // 写入文件
     async writeFile(uri, content, options) {
         const filePath = this.getPathFromUri(uri);
         const textContent = new TextDecoder().decode(content);
+        // 更新缓存内容
+        const cacheKey = uri.toString();
+        this.fileContentCache.set(cacheKey, textContent);
         const success = await this.model.saveFileContent(filePath, textContent);
         if (!success) {
             throw vscode.FileSystemError.Unavailable('保存文件失败');
@@ -61,11 +75,17 @@ class SquirrelFileSystemProvider {
     }
     // 其他必须实现的方法（简化实现）
     stat(uri) {
+        // 获取文件内容以确定大小
+        const cacheKey = uri.toString();
+        let content = '';
+        if (this.fileContentCache.has(cacheKey)) {
+            content = this.fileContentCache.get(cacheKey);
+        }
         return {
             type: vscode.FileType.File,
             ctime: Date.now(),
             mtime: Date.now(),
-            size: 0
+            size: Buffer.byteLength(content, 'utf8')
         };
     }
     readDirectory(uri) {
@@ -83,13 +103,23 @@ class SquirrelFileSystemProvider {
     watch(uri, options) {
         return new vscode.Disposable(() => { });
     }
+    // 清理文件缓存
+    clearFileCache(uri) {
+        const cacheKey = uri.toString();
+        this.fileContentCache.delete(cacheKey);
+    }
     // 从 URI 解析文件路径
     getPathFromUri(uri) {
         if (uri.scheme !== 'squirrel') {
             throw vscode.FileSystemError.FileNotFound(uri);
         }
+        // 移除查询参数，只返回路径部分
         return uri.path.substring(1); // 去掉开头的 '/'
     }
+    // 获取文件实例ID
+    getInstanceId(uri) {
+        return uri.query ? new URLSearchParams(uri.query).get('instance') || 'default' : 'default';
+    }
 }
 exports.SquirrelFileSystemProvider = SquirrelFileSystemProvider;
 //# sourceMappingURL=fileSystemProvider.js.map
\ No newline at end of file
diff --git a/dist/fileSystemProvider.js.map b/dist/fileSystemProvider.js.map
index 98c04a9..87324ad 100644
--- a/dist/fileSystemProvider.js.map
+++ b/dist/fileSystemProvider.js.map
@@ -1 +1 @@
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\ No newline at end of file
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\ No newline at end of file
diff --git a/squirrel-nut-explorer-1.0.0.vsix b/squirrel-nut-explorer-1.0.0.vsix
index e2846a1..e335f95 100644
Binary files a/squirrel-nut-explorer-1.0.0.vsix and b/squirrel-nut-explorer-1.0.0.vsix differ
diff --git a/src/commands.ts b/src/commands.ts
index 20a0501..20f7aa7 100644
--- a/src/commands.ts
+++ b/src/commands.ts
@@ -3,6 +3,57 @@ import { FileModel, FileEntry } from './model';
 import { FileProvider } from './provider';
 import { FunctionExtractor } from './functionExtractor';
 
+// 查找已打开的文档
+function findExistingDocument(filePath: string): vscode.TextDocument | undefined {
+    const documents = vscode.workspace.textDocuments;
+    for (const doc of documents) {
+        if (doc.uri.scheme === 'squirrel' && doc.uri.path === `/${filePath}`) {
+            return doc;
+        }
+    }
+    return undefined;
+}
+
+// 打开文件的通用函数
+async function openFile(model: FileModel, provider: FileProvider, entry: FileEntry): Promise<void> {
+    if (!model.getIsConnected()) {
+        vscode.window.showErrorMessage('请先连接到 pvfUtility API');
+        return;
+    }
+
+    // 检查是否已经有相同的文件打开
+    const existingDocument = findExistingDocument(entry.key);
+    if (existingDocument) {
+        // 如果文件已打开，则聚焦到该标签页
+        await vscode.window.showTextDocument(existingDocument);
+        return;
+    }
+
+    // 如果文件未打开，则在新标签页中打开
+    try {
+        await vscode.window.withProgress({
+            location: vscode.ProgressLocation.Notification,
+            title: `正在加载文件 ${entry.name}...`,
+            cancellable: false
+        }, async (progress) => {
+            const content = await model.getFileContent(entry.key);
+
+            if (content !== undefined) {
+                // 创建虚拟文档，使用时间戳确保URI唯一以支持多标签页
+                const timestamp = Date.now();
+                const uri = vscode.Uri.parse(`squirrel:/${entry.key}?instance=${timestamp}`);
+                const doc = await vscode.workspace.openTextDocument(uri);
+                await vscode.window.showTextDocument(doc, { preview: false });
+                provider.refresh();
+            } else {
+                vscode.window.showErrorMessage(`加载文件 ${entry.name} 失败`);
+            }
+        });
+    } catch (error) {
+        vscode.window.showErrorMessage(`打开文件失败: ${error}`);
+    }
+}
+
 export function registerCommands(context: vscode.ExtensionContext, model: FileModel, provider: FileProvider, functionExtractor: FunctionExtractor, output?: vscode.OutputChannel) {
     // 连接到 API
     console.log('注册 squirrel.connectToApi 命令...');
@@ -63,34 +114,9 @@ export function registerCommands(context: vscode.ExtensionContext, model: FileMo
         }
     });
 
-    // 打开文件
+    // 打开文件（单击或双击文件时调用）
     const openFileCommand = vscode.commands.registerCommand('squirrel.openFile', async (entry: FileEntry) => {
-        if (!model.getIsConnected()) {
-            vscode.window.showErrorMessage('请先连接到 pvfUtility API');
-            return;
-        }
-
-        try {
-            await vscode.window.withProgress({
-                location: vscode.ProgressLocation.Notification,
-                title: `正在加载文件 ${entry.name}...`,
-                cancellable: false
-            }, async (progress) => {
-                const content = await model.getFileContent(entry.key);
-
-                if (content !== undefined) {
-                    // 创建虚拟文档
-                    const uri = vscode.Uri.parse(`squirrel:/${entry.key}`);
-                    const doc = await vscode.workspace.openTextDocument(uri);
-                    await vscode.window.showTextDocument(doc);
-                    provider.refresh();
-                } else {
-                    vscode.window.showErrorMessage(`加载文件 ${entry.name} 失败`);
-                }
-            });
-        } catch (error) {
-            vscode.window.showErrorMessage(`打开文件失败: ${error}`);
-        }
+        await openFile(model, provider, entry);
     });
 
     // 保存文件（通过 VS Code 的保存事件处理，这个命令主要用于显示）
diff --git a/src/extension.ts b/src/extension.ts
index 92af655..7b2f6dc 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -116,6 +116,9 @@ export function activate(context: vscode.ExtensionContext) {
         isCaseSensitive: true
     });
 
+    // 将 fileSystemProvider 添加到 context 以便在 commands 中使用
+    (global as any).fileSystemProvider = fileSystemProvider;
+
     // 注册所有命令
     console.log('正在注册命令...');
     registerCommands(context, model, provider, functionExtractor, output);
@@ -147,7 +150,14 @@ export function activate(context: vscode.ExtensionContext) {
         }
     });
 
-    context.subscriptions.push(configChangeListener, saveListener);
+    // 注册文件关闭事件以清理缓存
+    const closeListener = vscode.workspace.onDidCloseTextDocument((doc) => {
+        if (doc.uri.scheme === 'squirrel') {
+            fileSystemProvider.clearFileCache(doc.uri);
+        }
+    });
+
+    context.subscriptions.push(configChangeListener, saveListener, closeListener);
 
     output.appendLine('[Squirrel] 扩展激活完成');
     output.show();
diff --git a/src/fileSystemProvider.ts b/src/fileSystemProvider.ts
index eb8d7bc..87d883f 100644
--- a/src/fileSystemProvider.ts
+++ b/src/fileSystemProvider.ts
@@ -5,6 +5,8 @@ export class SquirrelFileSystemProvider implements vscode.FileSystemProvider {
     private model: FileModel;
     private _onDidChangeFile = new vscode.EventEmitter<vscode.FileChangeEvent[]>();
     onDidChangeFile = this._onDidChangeFile.event;
+    // 存储文件实例内容，支持多标签页
+    private fileContentCache = new Map<string, string>();
 
     constructor(model: FileModel) {
         this.model = model;
@@ -13,12 +15,24 @@ export class SquirrelFileSystemProvider implements vscode.FileSystemProvider {
     // 读取文件
     async readFile(uri: vscode.Uri): Promise<Uint8Array> {
         const filePath = this.getPathFromUri(uri);
+
+        // 检查是否有缓存的内容（用于多标签页支持）
+        const cacheKey = uri.toString();
+        if (this.fileContentCache.has(cacheKey)) {
+            const content = this.fileContentCache.get(cacheKey)!;
+            return new TextEncoder().encode(content);
+        }
+
+        // 从模型获取内容
         const content = await this.model.getFileContent(filePath);
 
         if (content === undefined) {
             throw vscode.FileSystemError.FileNotFound(uri);
         }
 
+        // 缓存内容以支持多标签页
+        this.fileContentCache.set(cacheKey, content);
+
         return new TextEncoder().encode(content);
     }
 
@@ -27,6 +41,10 @@ export class SquirrelFileSystemProvider implements vscode.FileSystemProvider {
         const filePath = this.getPathFromUri(uri);
         const textContent = new TextDecoder().decode(content);
 
+        // 更新缓存内容
+        const cacheKey = uri.toString();
+        this.fileContentCache.set(cacheKey, textContent);
+
         const success = await this.model.saveFileContent(filePath, textContent);
 
         if (!success) {
@@ -36,11 +54,19 @@ export class SquirrelFileSystemProvider implements vscode.FileSystemProvider {
 
     // 其他必须实现的方法（简化实现）
     stat(uri: vscode.Uri): vscode.FileStat {
+        // 获取文件内容以确定大小
+        const cacheKey = uri.toString();
+        let content = '';
+
+        if (this.fileContentCache.has(cacheKey)) {
+            content = this.fileContentCache.get(cacheKey)!;
+        }
+
         return {
             type: vscode.FileType.File,
             ctime: Date.now(),
             mtime: Date.now(),
-            size: 0
+            size: Buffer.byteLength(content, 'utf8')
         };
     }
 
@@ -64,11 +90,23 @@ export class SquirrelFileSystemProvider implements vscode.FileSystemProvider {
         return new vscode.Disposable(() => {});
     }
 
+    // 清理文件缓存
+    clearFileCache(uri: vscode.Uri): void {
+        const cacheKey = uri.toString();
+        this.fileContentCache.delete(cacheKey);
+    }
+
     // 从 URI 解析文件路径
     private getPathFromUri(uri: vscode.Uri): string {
         if (uri.scheme !== 'squirrel') {
             throw vscode.FileSystemError.FileNotFound(uri);
         }
+        // 移除查询参数，只返回路径部分
         return uri.path.substring(1); // 去掉开头的 '/'
     }
+
+    // 获取文件实例ID
+    private getInstanceId(uri: vscode.Uri): string {
+        return uri.query ? new URLSearchParams(uri.query).get('instance') || 'default' : 'default';
+    }
 }
\ No newline at end of file
diff --git a/第三方API.md b/第三方API.md
new file mode 100644
index 0000000..00e0da3
--- /dev/null
+++ b/第三方API.md
@@ -0,0 +1,71 @@
+pvfUtility WebApi
+介绍
+pvfUtility 2020开始 一项重大的更新就是提供了HTTP接口进行自动化操作
+
+这使得第三方工具可以利用http rest api进行文件读写
+
+只需在软件内打开pvf,就能通过第三方工具进行下一步的操作
+
+
+获取pvfUtility版本号
+插件作者可以以版本来来确定用户当前使用的pvfUtility是否适用某些API接口
+请求类型：GET
+http://localhost:/Api/PvfUtiltiy/getVersion
+返回结果
+//注：使用此接口pvfUtility版本号需大于2022.9.30.2
+{"Data":"2022.9.30.3","IsError":false,"Msg":null}
+
+
+获取nut文件列表
+请求类型：GET
+http://localhost:/Api/PvfUtiltiy/GetFileList?dirName=sqr&returnType=0&fileType=nut
+解释：dirName=equipment(目录名称)
+fileType=.equ(文件后缀名) 注：使用fileType pvfUtility版本号必须大于：2022.08.08.2
+
+返回结果示例(returnType=1)
+{
+    "Data": [
+        "sqr/arad_cashshop.nut",
+        "sqr/hair_avagacha.nut",
+        "sqr/neck_avagacha.nut",
+        "sqr/belt_avagacha.nut"
+    ],
+    "IsError": false,
+    "Msg": null
+}
+
+
+批量获取nut文件内容
+请求类型：POST
+http://localhost:/Api/PvfUtiltiy/GetFileContents
+请求参数
+{"FileList":["sqr/arad_cashshop.nut","sqr/neck_avagacha.nut"],"UseCompatibleDecompiler":false,"EncodingType":Null}
+
+解释
+UseCompatibleDecompiler=是否使用兼容性反编译器
+注：使用encodingType参数 pvfUtility版本号需大于2022.12.3.1，
+//encodingType:仅适用于文本文件，默认使用UTF8
+//TW=中国台湾
+//CN=中国大陆
+//KR=韩国
+//JP=日本
+//UTF8
+//Unicode
+
+
+返回结果示例(注：文件内容为utf-8编码)
+{
+{"Data":{"FileContentData":{"sqr/arad_cashshop.nut":"\r\nlocal a = 0;\r\n","sqr/neck_avagacha.nut":"\r\nlocal b = 1;\r\n"}},"IsError":false,"Msg":null}
+
+
+上传新的文件内容
+新增或覆盖文件内容
+
+请求类型：POST
+http://localhost:/Api/PvfUtiltiy/ImportFile?filePath=[文件路径]
+请求参数(文本内容)：
+文件内容
+
+返回结果
+{"IsError":false,"Msg":null}
+