Tsahi contributed to OffchainLabs’ nitro-testnode and nitro-contracts repositories, focusing on targeted improvements over a two-month period. In nitro-testnode, Tsahi enabled block metadata tracking and integrated the timeboost feature to enhance sequencing performance, using Bash scripting and configuration management to ensure rollout safety via flag-driven logic. For nitro-contracts, Tsahi refactored native token management naming in Solidity, improving code clarity without altering functionality. The work emphasized maintainability and traceability, with changes documented in dedicated commits. While the scope was limited to two features and no bug fixes, the contributions demonstrated careful attention to code quality and operational safety in deployment.