Worked on the facebook/buck2-prelude repository to enhance FOA (First-Order Access) dependency validation by introducing label-based allowlisting for generated targets. This feature was implemented using Bzl and focused on build system and dependency management skills. The approach involved exposing a new LabelInfo provider from both android_library_impl and java_library_impl, enabling more granular and policy-driven control over which generated targets participate in FOA checks. These changes improved build determinism, security, and maintainability by ensuring only approved targets are validated. The work established a foundation for scalable FOA policy enforcement and set the stage for future automation within the build process.