February 2025: Delivered two core features for JetBrains/lincheck that enhance runtime correctness and instrumentation performance, along with accompanying tests and code organization improvements. The team introduced a Class<T> newDefaultInstance() extension to correctly instantiate inner and nested classes, with InnerClassTest.kt verifying behavior across enclosing classes. In addition, we caching ideaPluginEnabled to a top-level property to eliminate repeated checks and speed up instrumentation when the IDEA plugin is enabled. These changes reduce instantiation errors, lower runtime overhead, and provide faster feedback loops for developers relying on LinChecker. Business value: more reliable test data generation for complex class hierarchies and faster LinChecker runs, driving faster iteration and higher confidence in concurrency-related fixes. Technical impact includes improved Kotlin/Java interop for reflective instantiation and a cleaner code path for plugin-enabled instrumentation.