Authored KIP-1389 to surface effective group configurations to clients. Kafka Streams state management: two JIRA-tracked fixes around state directory cleanup after a corrupted store or an interrupted shutdown, a share group assignor fix for stale topic assignments, plus ongoing test work: Java 9+ cleanup across tools, storage and server, assertion cleanup in Streams and Connect, filling test gaps in the group coordinator and Streams task assignor, and cutting the runtime of slow Streams integration tests.

Started with BuildKit caching docs: corrected a wrong description of the local cache backend, documented its undocumented tag and reset parameters, then fixed arithmetic in a build cache GC policy example. Since then, smaller fixes across install and admin docs.

While documenting reset for docker/docs, I found the flag can race with a concurrent export and reported it as #7102. A maintainer opened #7153 to fix it; I built both branches and re-ran the reproduction to confirm the patch closes the race. Merged to master after v0.33.0, and #7102 closed as completed.