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 a 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 a 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.

10 November 2026