Worked on the JetBrains/kotlin-compiler-server repository, focusing on build configuration and dependency management using Kotlin and TOML. Upgraded the Kotlin version in Gradle and dependency files to align with release candidate milestones, ensuring compatibility with downstream tooling and improving CI reliability. Addressed test stability by refining type inference error assertions in HighlightTest.kt, which enhanced cross-target test reliability across JVM, JS, and Wasm. Collaborated closely with QA and CI processes to maintain consistent error messaging and reduce flaky test outcomes. The work laid a stable foundation for future features, emphasizing robust build systems and reliable automated testing practices throughout development.