# Welcome to your VS Code Extension## What's in the folder* This folder contains all of the files necessary for your extension.*`package.json` - this is the manifest file in which you declare your extension and command.The sample plugin registers a command and defines its title and command name. With this informationVS Code can show the command in the command palette. It doesn’t yet need to load the plugin.*`src/extension.ts` - this is the main file where you will provide the implementation of your command.The file exports one function, `activate`, which is called the very first time your extension isactivated (in this case by executing the command). Inside the `activate` function we call `registerCommand`.We pass the function containing the implementation of the command as the second parameter to`registerCommand`.## Get up and running straight away* Press `F5` to open a new window with your extension loaded.* Run your command from the command palette by pressing (`Ctrl+Shift+P` or `Cmd+Shift+P` on Mac) and typing `Hello World`.* Set breakpoints in your code inside `src/extension.ts` to debug your extension.* Find output from your extension in the debug console.## Make changes* You can relaunch the extension from the debug toolbar after changing code in `src/extension.ts`.* You can also reload (`Ctrl+R` or `Cmd+R` on Mac) the VS Code window with your extension to load your changes.## Explore the API* You can open the full set of our API when you open the file `node_modules/vscode/vscode.d.ts`.## Run tests* Open the debug viewlet (`Ctrl+Shift+D` or `Cmd+Shift+D` on Mac) and from the launch configuration dropdown pick `Launch Tests`.* Press `F5` to run the tests in a new window with your extension loaded.* See the output of the test result in the debug console.* Make changes to `test/extension.test.ts` or create new test files inside the `test` folder. * By convention, the test runner will only consider files matching the name pattern `**.test.ts`. * You can create folders inside the `test` folder to structure your tests any way you want.