Anmegi focused on security hardening within the Plonky3/Plonky3 repository, addressing vulnerabilities in the Challenger module. They replaced debug assertions with regular assertions in critical sampling and proof-of-work grinding functions, ensuring that potential issues would be caught in production rather than only during development. To further strengthen the module, Anmegi introduced targeted tests designed to surface and prevent vulnerabilities related to bit sampling and proof-of-work mechanisms. Working primarily in Rust and leveraging expertise in cryptography and system testing, Anmegi’s contributions improved the cryptographic reliability and robustness of the codebase, reflecting a deep, detail-oriented approach to secure systems engineering.