Worked on the starkware-libs/stwo-cairo repository to deliver a feature focused on standardizing opcode handling within the adapter. The approach consolidated multiple opcode variants, removed redundant fields, and simplified the logic for key instructions such as add, add_ap, jnz, and mul. By aligning the adapter’s opcode representation with stwo-air-infra, the work reduced code duplication and streamlined future maintenance. This effort involved code refactoring and low-level programming, utilizing both Cairo and Rust to ensure consistency across components. The changes improved reliability and maintainability of the opcode pathways, laying groundwork for easier future refactors and reducing the overall maintenance burden.