Yeji Han developed and released Coq-sflib 2.1.0, a new proof automation library for the coq/opam repository, focusing on enhancing proof construction and rewriting workflows in Coq. The work involved formal verification and package management using OCaml, with careful attention to reproducible builds and compatibility with the dune build system. Yeji prepared comprehensive release notes, documented the release commit, and ensured the package met repository standards for traceability and maintainability. By introducing new lemmas and tactics, the library addressed the need for more efficient proof automation, reflecting a thorough and methodical approach to both engineering and release hygiene.