During July 2025, Harry focused on backend reliability and data quality within the Arbitrum ecosystem, contributing to both the ethereum/go-ethereum and l2beat/l2beat repositories. He addressed a potential integer overflow in gas estimation by refining the binary search midpoint calculation, improving gas limit reliability for Layer 2 scenarios using Go. Additionally, he updated Arbitrum project metadata, ensuring more accurate and current ecosystem information for developers by revising website and repository links with TypeScript. Harry’s work demonstrated careful attention to protocol maintainability and auditability, applying targeted fixes and configuration management practices that enhanced both operational stability and developer experience.