Worked on enhancing documentation and code clarity across the penumbra-zone/penumbra and starkware-libs/cairo repositories, focusing on improving developer onboarding and maintainability. In penumbra, addressed documentation quality by clarifying comments and fixing typos, ensuring alignment with project standards without introducing functional changes. For Cairo, expanded documentation for identifiers and the felt252 type, providing detailed explanations, rules, and usage examples involving modular arithmetic and type conversions. Utilized Cairo, Rust, and adoc to deliver these improvements, emphasizing technical writing and programming language design. The work reduced ambiguity, improved code safety, and supported future contributors by making project documentation more accessible and consistent.