Worked on improving cross-compilation reliability in the rust-lang/cargo repository by addressing a bug in artifact dependency propagation. Focused on ensuring that artifact dependencies were not incorrectly propagated to proc-macros or build dependencies, and that feature resolution occurred for the correct target architecture. Consolidated multiple commits into a single, maintainable fix and introduced comprehensive tests to prevent panics and regressions in cross-compilation scenarios. Utilized Rust and expertise in build systems and dependency management to enhance build stability across host and target configurations. The work improved maintainability and traceability of the codebase, supporting more robust cross-target workflows for Cargo.