Notable Changes in IntelliJ Platform and Plugins API 2023.*

Early Access Program (EAP) releases of upcoming versions are available here.

2023.3

Threading Model changes: Please see updated Threading Model.
External Annotators in Dumb Mode: External Annotator can now run in during indexing.
Local inspections performance: Custom language plugins with many inspections should consider registering a default visitor to improve processing, see Inspections Performance.

Unbundled plugins: Several plugins (Android, Ant, GlassFish, Plugin DevKit) have been unbundled. The IDE will suggest installation if the project contains related framework dependency. If your plugin depends on them, users will need to install them from the JetBrains Marketplace.

Language Server Protocol (LSP) API: Provide custom language support by using language servers, see Language Server Protocol (LSP).
Check presence of JVM library: Use dedicated API to check presence via class FQN or Maven coordinates.
Inspection description: code snippets highlighting: Embedded code is shown with syntax highlighting.
Intentions that cannot show meaningful before/after preview: Intentions not modifying code can specify <skipBeforeAfter>true</skipBeforeAfter> in their registration.
JCEF-based SVG viewer: SVG pictures are now shown using JCEF instead of rendering via the Apache Batik library (Details).

Unbundled plugins: Several plugins (Play 1, Resin, Struts 2, tcServer) have been unbundled. The IDE will suggest installation if the project contains related framework dependency. If your plugin depends on them, users will need to install them from the JetBrains Marketplace.

API for quick documentation: Documentation for custom languages is provided through the DocumentationTarget API for versions 2023.1 or later.

Declarative Inspection Options: Code inspections can provide additional options in a declarative way which has several benefits over the UI-based approach.
Nested Index Access: Accessing index data in nested calls is now possible. NOTE: Please do not use yet This is known to cause problems under certain conditions, please watch this issue.
File Type Index Topic: FileTypeIndex.IndexChangeListener allows monitoring the addition/removal of files by FileType.
Run Annotator During Indexing: Annotators can implement DumbAware to run during indexing (e.g., providing additional syntax highlighting).
Obsolete API Status: Newly introduced @ApiStatus.Obsolete marks API that should not be used for new code, see Obsolete API.

Last modified: 15 January 2025