Worked on the ucsd-progsys/liquid-fixpoint-debug repository, focusing on a targeted refactor of the Pred typeclass to streamline type system usage in Haskell. The main effort involved removing explicit Semigroup and Monoid instances for Pred, which previously favored the PAnd operation, in order to clarify algebraic intent and reduce maintenance complexity. This code refactoring initiative eliminated unused instances and reduced cognitive overhead for future contributors. By simplifying the underlying functional programming constructs, the work established a cleaner foundation for subsequent feature development and bug fixes, ensuring that future enhancements can be implemented with greater safety and reduced risk of edge cases.