1. Prerequisites
Download and Install IntelliJ IDEA
Download and install IntelliJ IDEA from here.
Check out IntelliJ Platform Source Files
Download the IntelliJ Platform source files as described in the IntelliJ IDEA README file.
Install Required Plugins
Make sure that the Plugin DevKit and Gradle plugins are enabled.
Install and enable Grammar-Kit and PsiViewer (optionally) 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.
04 November 2025