Amper 0.9.0 introduces its first extensibility prototype, allowing users to create custom tasks through local plugins using Kotlin and YAML, with plans to enable plugin sharing in future updates. The release also includes improvements in dependency resolution, enabling faster performance by caching dependency graphs, and introduces incremental Java compilation to enhance build efficiency. Users transitioning from Maven or Gradle can now maintain their existing directory layout with the new "maven-like" option, while library catalogs can be placed at the project root for convenience. IDE enhancements feature automatic project configuration sync, improved dependency management, and new tools for setting the main class, alongside customizable color themes in Amper YAML files. The release updates default versions for various toolchains and frameworks, maintaining Amper's experimental status with ongoing development shaped by user feedback.