Nenekotan enhanced reliability and compatibility across the NomicFoundation/edr and NomicFoundation/hardhat repositories by focusing on backend development and CI/CD improvements. They updated GitHub Actions workflows to use macOS 13 runners, ensuring continued support for Intel builds and alignment with the latest macOS releases. In hardhat, they upgraded the EDR dependency to version 0.6.5 and introduced a changeset to document the update, promoting better dependency management. Additionally, they modified the block response API to make totalDifficulty optional, aligning with the Ethereum execution API specification. Their work leveraged TypeScript and YAML, emphasizing robust integration and maintainable release processes.