Developed a new OPAM package, ppx_subliner, for the ocaml/opam-repository to enhance command-line interface generation using OCaml. Focused on automating and standardizing Cmdliner-based CLI creation, the work introduced a deriving plugin and ppx rewriter that reduce manual boilerplate in command definitions. By leveraging OCaml’s metaprogramming capabilities, the solution streamlines CLI development and promotes consistency across projects. The approach centered on package management and command-line interface development, laying groundwork for improved maintainability and user experience. This feature, released as ppx_subliner.0.2.2, established a foundation for more efficient CLI tooling within the repository, with no bugs reported during the period.