To add the JBehave plugin in IntelliJ, open IntelliJ IDEA and navigate to File > Settings > Plugins (or IntelliJ IDEA > Preferences > Plugins on macOS). In the Plugins window, click the Marketplace tab and search for "JBehave" in the search box. You'll find the official JBehave plugin in the results. Click Install to add it to your IDE, then restart IntelliJ when prompted to activate the plugin.
Once installed, the plugin provides syntax highlighting for .story files, step definitions autocompletion, and navigation between story files and step definitions. You can verify the installation by checking File > Settings > Plugins again—JBehave should appear in the installed plugins list.
If you're using an older version of IntelliJ or prefer manual installation, you can download the plugin JAR file from the JetBrains plugin repository and place it in your plugins directory. However, using the marketplace is the recommended approach as it handles updates automatically and ensures compatibility with your IntelliJ version.
After installation, you may want to configure JBehave settings under File > Settings > JBehave to specify your story locations and step definitions paths for optimal IDE support.