Worked on modularizing and improving maintainability across the sigp/lighthouse and ssvlabs/ssv repositories over a two-month period. Delivered a modular refactor of VoluntaryExit domain computation in Lighthouse by extracting the get_domain logic into a public Rust function, enabling broader reuse and reducing code duplication for signing workflows. Enhanced onboarding and documentation by clarifying late block re-organization concepts in the Lighthouse Book using Markdown, supporting user understanding of network health and proposer profitability. In ssv, removed unused Go code to simplify the codebase and reduce maintenance overhead. Focused on code cleanup, refactoring, and documentation to strengthen long-term project stability.