diff --git a/README.md b/README.md
index f1328f4..8f32f68 100644
--- a/README.md
+++ b/README.md
@@ -1,65 +1,2 @@
-# zsh README
-
-This is the README for your extension "zsh". After writing up a brief description, we recommend including the following sections.
-
-## Features
-
-Describe specific features of your extension including screenshots of your extension in action. Image paths are relative to this README file.
-
-For example if there is an image subfolder under your extension project workspace:
-
-\!\[feature X\]\(images/feature-x.png\)
-
-> Tip: Many popular extensions utilize animations. This is an excellent way to show off your extension! We recommend short, focused animations that are easy to follow.
-
-## Requirements
-
-If you have any requirements or dependencies, add a section describing those and how to install and configure them.
-
-## Extension Settings
-
-Include if your extension adds any VS Code settings through the `contributes.configuration` extension point.
-
-For example:
-
-This extension contributes the following settings:
-
-* `myExtension.enable`: enable/disable this extension
-* `myExtension.thing`: set to `blah` to do something
-
-## Known Issues
-
-Calling out known issues can help limit users opening duplicate issues against your extension.
-
-## Release Notes
-
-Users appreciate release notes as you update your extension.
-
-### 1.0.0
-
-Initial release of ...
-
-### 1.0.1
-
-Fixed issue #.
-
-### 1.1.0
-
-Added features X, Y, and Z.
-
------------------------------------------------------------------------------------------------------------
-
-## Working with Markdown
-
-**Note:** You can author your README using Visual Studio Code.  Here are some useful editor keyboard shortcuts:
-
-* Split the editor (`Cmd+\` on macOS or `Ctrl+\` on Windows and Linux)
-* Toggle preview (`Shift+CMD+V` on macOS or `Shift+Ctrl+V` on Windows and Linux)
-* Press `Ctrl+Space` (Windows, Linux) or `Cmd+Space` (macOS) to see a list of Markdown snippets
-
-### For more information
-
-* [Visual Studio Code's Markdown Support](http://code.visualstudio.com/docs/languages/markdown)
-* [Markdown Syntax Reference](https://help.github.com/articles/markdown-basics/)
-
-**Enjoy!**
+# zsh completion script
+detect first line of file, if match `#compdef` or `#autoload`, mark it as `shellscript`
\ No newline at end of file
diff --git a/extension.js b/extension.js
index 6d831fa..026005b 100644
--- a/extension.js
+++ b/extension.js
@@ -1,35 +1,29 @@
-// The module 'vscode' contains the VS Code extensibility API
-// Import the module and reference it with the alias vscode in your code below
 const vscode = require('vscode');
 
-// this method is called when your extension is activated
-// your extension is activated the very first time the command is executed
-
-/**
- * @param {vscode.ExtensionContext} context
- */
-function activate(context) {
-
-	// Use the console to output diagnostic information (console.log) and errors (console.error)
-	// This line of code will only be executed once when your extension is activated
-	console.log('Congratulations, your extension "zsh" is now active!');
-
-	// The command has been defined in the package.json file
-	// Now provide the implementation of the command with  registerCommand
-	// The commandId parameter must match the command field in package.json
-	let disposable = vscode.commands.registerCommand('zsh.helloWorld', function () {
-		// The code you place here will be executed every time your command is executed
-
-		// Display a message box to the user
-		vscode.window.showInformationMessage('Hello World from zsh!');
-	});
+function detect() {
+	if (vscode.window.activeTextEditor.document.languageId != 'plaintext') {
+		return
+	}
+	const line = vscode.window.activeTextEditor.document.lineAt(0).text
+	if (line && line.match(/^#compdef|^#autoload/)) {
+		vscode.languages
+			.setTextDocumentLanguage(vscode.window.activeTextEditor.document, "shellscript")
+			.catch(err => {
+				console.error(err)
+			})
+	}
+}
 
-	context.subscriptions.push(disposable);
+function activate() {
+	vscode.window.onDidChangeVisibleTextEditors(() => {
+		detect()
+	})
+	detect()
 }
+
 exports.activate = activate;
 
-// this method is called when your extension is deactivated
-function deactivate() {}
+function deactivate() { }
 
 module.exports = {
 	activate,
diff --git a/icon.png b/icon.png
new file mode 100644
index 0000000..f1f3526
Binary files /dev/null and b/icon.png differ
diff --git a/package.json b/package.json
index 2fd8bc1..6dc735f 100644
--- a/package.json
+++ b/package.json
@@ -1,26 +1,20 @@
 {
-	"name": "zsh",
-	"displayName": "zsh",
-	"description": "",
-	"version": "0.0.1",
+	"name": "zsh-completion-script",
+	"displayName": "zsh completion script detect",
+	"description": "zsh completion script detect",
+	"version": "1.0.0",
+	"publisher": "dual",
+	"icon": "icon.png",
 	"engines": {
 		"vscode": "^1.43.0"
 	},
 	"categories": [
-		"Other"
+		"Programming Languages"
 	],
 	"activationEvents": [
-		"onCommand:zsh.helloWorld"
+		"onLanguage:plaintext"
 	],
 	"main": "./extension.js",
-	"contributes": {
-		"commands": [
-			{
-				"command": "zsh.helloWorld",
-				"title": "Hello World"
-			}
-		]
-	},
 	"scripts": {
 		"lint": "eslint .",
 		"pretest": "npm run lint",
@@ -37,4 +31,4 @@
 		"typescript": "^3.8.3",
 		"vscode-test": "^1.3.0"
 	}
-}
+}
\ No newline at end of file