Worked on the rust-lang/gcc repository to improve CI stability and build-system maintenance for the rs6000 target. Addressed an autobuilder complaint by regenerating the rs6000/rs6000.opt.urls file and adding a new entry for 'msplit-patch-nops', ensuring that CI inputs aligned with current endpoints for reproducible builds. Updated documentation to capture these changes, supporting traceability and future maintenance. Focused on enhancing autobuilder reliability, which reduced flaky builds and accelerated feedback loops. Utilized C and build system expertise to maintain robust integration workflows, emphasizing documentation practices that facilitate ongoing development and support for the rs6000 target within the project.