JetBrains Unifies Kotlin With a New Toolchain

JetBrains' build tool, Amper, is now the official Kotlin Toolchain, aiming to unify and simplify how developers build all Kotlin projects.

JetBrains has officially announced that its experimental build tool, Amper, has evolved into the Kotlin Toolchain. According to a post on the JetBrains Blog, this change took effect with the 0.11 release, which is currently in an Alpha stage. The move solidifies the project's status from a side experiment to a core part of the Kotlin ecosystem's future. The goal is to create a single, unified, and simplified entry point for configuring and building any Kotlin application. As part of this transition, all future news and updates about the tool will be published on the main Kotlin blog, centralizing information and underscoring its official status as the future of Kotlin project management.

At its core, the Kotlin Toolchain is a direct response to a long-standing pain point in the Kotlin community: the complexity of build configuration. It aims to replace the often verbose and complex Gradle build scripts, which are written in Groovy or Kotlin DSL, with a much simpler, declarative approach using YAML files. This manifest-based system allows developers to define their project structure, dependencies, and platform targets in a way that is easy to read, write, and maintain. The primary benefit is a significant reduction in boilerplate code and cognitive load, particularly for Kotlin Multiplatform (KMP) projects. KMP allows developers to share code across various platforms like Android, iOS, web, and desktop, but configuring the build process for these targets has historically been a major hurdle for teams.

This development fits into a broader industry trend toward improving the developer experience by simplifying foundational tooling. For years, the Kotlin ecosystem has relied heavily on Gradle, a powerful but notoriously complex system with a steep learning curve. By creating its own opinionated build tool, JetBrains is taking greater control over the end-to-end development lifecycle for its language. This mirrors strategies seen elsewhere, such as Apple's tight integration of Swift with its Xcode build environment. The shift towards declarative configuration also aligns with modern DevOps practices, where tools like Terraform and Kubernetes use simple, human-readable files to manage complex infrastructure, promoting consistency and reducing errors. The Kotlin Toolchain applies this same philosophy to application development itself.

For developers and technology leaders, this announcement serves as a clear roadmap for the future of building with Kotlin. While the toolchain is still in Alpha and not yet recommended for production use, its official branding signals a strong commitment from JetBrains. Teams should begin experimenting with it in smaller, non-critical projects to understand its declarative approach and potential benefits. The key aspects to monitor will be its path to a stable release, its feature parity with Gradle, and the migration strategies for existing projects. For CTOs, the Kotlin Toolchain represents a potential long-term strategic advantage. A simplified build system could streamline developer onboarding, reduce time spent on configuration maintenance, and ultimately accelerate the delivery of complex, cross-platform applications.

This officially rebrands Amper as a core part of the Kotlin ecosystem, not just an experiment. For developers, it signals a future with a simpler, declarative alternative to complex Gradle build scripts, aiming to drastically reduce configuration overhead, especially for challenging Kotlin Multiplatform projects.

By simplifying project setup and maintenance, the Kotlin Toolchain can lower the barrier to entry for Kotlin Multiplatform. This could reduce development costs, accelerate time-to-market for cross-platform apps, and make it easier for companies to hire and onboard developers onto complex Kotlin codebases.