Worked on the facet-rs/facet repository to deliver a feature enabling enum tag discriminants with numeric support in Rust serialization and deserialization workflows. This update allowed enums to use integer tag values when the tag attribute is combined with is_numeric, improving consistency for internally and adjacently tagged enums, especially those using repr(u8). The implementation included an end-to-end example demonstrating round-trip serialization with facet_json, ensuring predictable tag values and seamless interoperability with JSON-based protocols. The work focused on macro-based tagging, clear documentation, and enhanced developer experience, leveraging skills in Rust, enum handling, and serialization without introducing breaking changes or bug fixes.