Dart's library-scoped privates (use part/part of), Kotlin's lack of any
equivalent (use an internal fixture object), and the TypeScript seams
that compile clean and fail at runtime - three projects hit that last
one. Also the per-project test baselines, including that gradle prints
UP-TO-DATE rather than a count and needs JDK 21 pinned.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011w2Pj4Ek3ZNMQVYcFHgXDY
