During March 2026, Shu Nu focused on enhancing the security and reliability of package management in the ocaml/dune and Leonidas-from-XIV/dune repositories. Shu developed a secure package locking mechanism in ocaml/dune, introducing stronger hash algorithms for package checksums to improve integrity and reduce tampering risks. In Leonidas-from-XIV/dune, Shu fixed issues with locking relative paths outside the workspace, aligning behavior with Opam and improving usability for developers. Working primarily in OCaml, Shu applied expertise in package management and security best practices, delivering targeted improvements that addressed both cross-repository consistency and the robustness of packaging workflows for CI environments.