Yanis Zaf delivered cross-repository improvements focused on macOS build reliability and language tooling. In gittools-bot/homebrew-core, Yanis implemented a complete end-to-end build flow for the Arturo language, orchestrating dependencies and refining library handling to ensure reproducible builds on macOS. Concurrently, in the macports/macports-ports repository, Yanis upgraded the Nim language from version 2.2.4 to 2.2.6, updating checksums to enhance security verification for users and CI systems. This work demonstrated proficiency in Homebrew formula creation, package management, and version control, addressing reproducibility and verification challenges while collaborating across repositories to improve developer and end-user experience.