Getting-Started-guides | Getting Started guides and samples for CEP extensions | Stream Processing library

CEP (Common Extensibility Platform) lets you build extensions in Adobe Creative Cloud applications like Photoshop, Illustrator, InDesign, After Effects, and many more. Extensions built with CEP let users customize their Creative Cloud experience for their unique workflows. In this guide, we will help you quickly get started building a CEP extension by covering the basics in 6 easy steps. By the end of this guide, we will have a CEP extension that opens a new document from the user's local folder. When you're finished, be sure to check out the Next Steps section, which has links to guides and samples that will walk you through debugging as well as some common intermediate and advanced topics, like exporting files from the host app, making network requests, and more.
You need to download the latest version of CEP's CSInterface.js library, which enables you to control the extension and communicate with the application. You can include this library wherever you like within your codebase, as long as you include it as a <script> dependency in your index.html file. If you're following along with this example, place the downloaded CSInterface.js directly under /client.