Nenekotan focused on backend reliability and API compatibility across the NomicFoundation/edr and NomicFoundation/hardhat repositories. They updated the GitHub Actions CI/CD pipeline to use macOS 13 runners, ensuring ongoing compatibility with the latest macOS releases while supporting Intel builds. In hardhat, they upgraded the @nomicfoundation/edr dependency and made the totalDifficulty field optional in block responses, aligning with the Ethereum execution API specification. Their work, primarily in TypeScript and YAML, emphasized dependency management and robust API integration. These targeted improvements enhanced release hygiene and streamlined development cycles, reflecting a thoughtful approach to cross-repository maintenance and protocol compliance.