Open-Sourcing the LSP Client API in IntelliJ IDEA 2026.2 - The JetBrains Blog

IntelliJ IDEA is set to open-source its Language Server Protocol (LSP) client API in the 2026.2 release cycle, addressing issues faced by plugin authors who previously had to create custom solutions due to the lack of a unified open-source LSP client. This initiative aims to enhance integration across JetBrains IDEs, Android Studio, and other products built on the IntelliJ Open Source project by providing a stable and battle-tested platform client. The API will undergo a renaming process to eliminate confusion between client and server roles, with the changes anticipated to be available by the 2026.1.4 stable build. The collaboration between JetBrains and Google may lead to Android Studio support arriving sooner than the 2026.2 release. Plugin developers are encouraged to monitor updates, adapt to new API names, and consider the LSP article in the IntelliJ Platform SDK Docs for new language integrations while using available tools like the IntelliJ Platform Plugin generator for plugin development.

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