Download and Install IntelliJ IDEA
Download and install either IntelliJ IDEA Ultimate or IntelliJ IDEA Community Edition from here.
Check out Community Edition Source Files
Download the IntelliJ IDEA Community Edition source files as described in the IntelliJ IDEA Community Edition README file.
Install Required Plugins
Make sure that the bundled Plugin DevKit and Gradle plugins are enabled. Install and enable Grammar-Kit and PsiViewer plugins.
Create a Project
Create an empty IntelliJ Platform Plugin project or start using IntelliJ Platform Plugin Template when creating a plugin hosted on GitHub.
Last modified: 17 February 2023