Developed and released the initial Secp256k1 OCaml package in the ocaml/opam-repository, delivering ECDSA operations and public key management for the OCaml ecosystem. Focused on cryptography and package management, the work included raising the minimum supported OCaml version to 4.12, ensuring improved compatibility and reliability for downstream users. The implementation provided a ready-to-use OCaml binding for the widely used secp256k1 elliptic curve library, aligning with opam-repository release processes and compliance requirements. No major bugs were reported during the period, reflecting a targeted engineering effort on feature delivery and ecosystem integration using OCaml and related development tools.