Prerequisites

1. Create a new company.

   For more information, see the document on company setup.

2. (Optional) Create a new listing in the Exchange Partner Portal.

   For more information, see the document on [creating an exchange listing](https://experienceleague.adobe.com/docs/launch/using/extension-dev/submit/create-listing.html.

3. Create a new Adobe I/O integration.

   For more information, see the tutorial on creating an Adobe I/O integration.

Build an Experience Platform Launch extension interface

To build the Experience Platform Launch extension interface, complete the following steps:

1. Create a new directory for your Experience Platform Launch extension.

2. In a terminal window, run npx @adobe/reactor-scaffold.

   • The scaffold tool prompts you with a series of questions to build the extension folder and add the appropriate metadata.

   • Make sure that you have your Android Maven and iOS CocoaPods URLs handy.

3. Develop the extension.

   a. Edit the src/view/configuration/configuration.html file that was created by the scaffold tool.

   b. Modify this page if you need to config parameters from customers.

   If you used the scaffold tool to add actions/events or data elements as part of your extension, these will have separate folders with HTML files that can be modified.

4. In a terminal window, run npx @adobe/reactor-sandbox.

   This step loads a simulated Experience Platform Launch environment @ [http://localhost:3000](http://localhost:3000) to test configuration inputs and other aspects of the Launch extension.

5. In a terminal window, run npx @adobe/reactor-packager.

   This step creates a zip file of your finished Experience Platform Launch extension.

6. In a terminal window, run npx @adobe/reactor-uploader.

   This step uploads your extension to Experience Platform Launch.