Npai contributed to the across-protocol/sdk repository by focusing on backend development and API integration using TypeScript. Over three months, Npai delivered a deterministic multicall chains bug fix, improving the reliability and predictability of on-chain operations by addressing edge-case nondeterminism. Npai also implemented and later rolled back a retry logic feature for Arweave client interactions, prioritizing codebase stability and documenting the process for future resilience work. Additionally, Npai managed release versioning updates, ensuring metadata consistency and traceability across package releases. The work demonstrated careful attention to error handling, clean commit practices, and a methodical approach to maintaining production stability.