JetBrains announced a streamlined default structure for Kotlin Multiplatform (KMP) projects, replacing the all‑in‑one <code>composeApp</code> module with a <code>shared</code> module and separate app modules for each platform.
The <code>shared</code> module contains common code, while platform‑specific modules such as <code>androidApp</code>, <code>desktopApp</code> and <code>webApp</code> depend on it. This change clarifies module responsibilities and aligns projects with modern build conventions.
Developers can further split shared code into <code>sharedLogic</code> and <code>sharedUI</code> when using native UIs (for example, SwiftUI on iOS). Projects that include a server now gain a dedicated <code>server</code> module and a <code>core</code> module for shared models and validation logic.
The restructuring addresses issues in the previous template, which mixed multiplatform library code and application configuration, making it hard to tell where to place platform‑specific settings. It also prepares projects for Android Gradle Plugin 9.0 (AGP 9), which requires the Android entry point to be in its own module.
The new setup is already available via JetBrains’ project wizard, and migration of existing projects is optional except for AGP 9.0‑specific changes, which are mandatory for Android targets.
Developers can explore the new template at JetBrains’ KMP wizard and reference the migration guide for existing projects.
More information can be found on the official blog post:
<a href="https://blog.jetbrains.com/kotlin/2026/05/new-kmp-default-structure/" target="_blank" rel="noopener nofollow">https://blog.jetbrains.com/kotlin/2026/05/new-kmp-default-structure/</a>

JetBrains Simplifies Kotlin Multiplatform Project Structure