- Use published Bento boxes for Ubuntu 26.04, Debian 13, and Rocky Linux 10.1.\n- Pin exact VirtualBox amd64 box versions in CI.\n- Remove the obsolete Ubuntu SSH workaround and update fixtures.
- key immutable caches from a pinned box manifest instead of scenario YAML - skip producer restoration and downloads on exact cache hits - validate lock drift, exact versions, architectures, and missing boxes