Elena Pertseva enhanced the Twist and Shout module in the GaloisInc/zk-lean repository by delivering new bitwise operations and assertion features focused on robust bit-vector equality and alignment checks. Working in Lean and applying formal verification and type theory, she introduced new lemmas and definitions that improved the correctness and reliability of bitwise workflows. Her work addressed edge cases in equality handling, reducing failure surfaces in core logic and stabilizing module behavior. By validating these enhancements within the repository, Elena established a stronger foundation for future formal verification improvements in cryptographic and zero-knowledge proof tooling using functional programming principles.