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K2 mode

K2 Mode in IntelliJ IDEA 2025.1: Current State and FAQ

Starting with IntelliJ IDEA 2025.1, K2 mode, a new implementation of Kotlin support, will be enabled by default. This change is an important step in the ongoing effort to improve Kotlin support in the IDE.  While this transition brings many improvements and lays the foundation for a smoother…

Teodor Irkhin
Teodor Irkhin

The Story Behind K2 Mode and How It Works

I'm Yan Zhulanow, and I lead the Kotlin Analysis API team. Last year, we made a series of announcements about Kotlin K2 mode in IntelliJ IDEA. Now, as K2 mode is about to become the default, I am thrilled to tell you more about everything we had to go through to make this release happen. Even bef…

Yan Zhulanow
Yan Zhulanow