- Fix numerous bugs across Active Support, Active Record, Action View, Action Cable, and database adapters (e.g., ERB tokenization with multibyte chars, MySQL foreign key handling, race condition in attribute definition, prepared statement...
- Add new capabilities: decorate methods generated by class attributes, expose ActionDispatch::Request::Session.store to meet Rack spec, and restore the ability to specify only a database name in the DATABASE URL.
- Improve CI and system‑test handling by skipping unnecessary system‑test generation, avoiding bin/thrust addition when the thruster gem is absent, and ensuring the PostgreSQL adapter always uses a dedicated connection in tests.