Worked on the acl2/acl2 repository to enhance the Vector Adder Meta by introducing a second parameter, 'sc', to the rp handling within int-vector-adders-meta.lisp. This targeted feature enabled bitp-specific behavior, increasing the flexibility and maintainability of the vector adder meta-collection. The approach focused on functional programming principles and algorithm design, leveraging Lisp to refactor the codebase for extensibility and clearer traceability. All changes were linked to issue #1886 and documented with a specific commit reference for auditability. No bugs were reported or fixed during this period, as the primary focus was on robust feature development and code clarity.