Judah RCR developed the ZIP-235 Network Sustainability Mechanism for the ZcashFoundation/zebra repository, focusing on enhancing transaction validation and miner fee handling in line with ZIP-235 requirements. Using Rust and blockchain development expertise, Judah updated and expanded the test suite to ensure full compliance with the new protocol changes, while also removing legacy ZIP-234 configuration flags to streamline future upgrades. This work reduced configuration debt and improved network stability, positioning Zebra for sustainable protocol evolution. The depth of the implementation reflects careful attention to protocol details, robust testing practices, and a clear understanding of blockchain upgrade processes and Rust development.