Chris Morin enhanced the WunderGraph Cosmo router by addressing reliability issues in header propagation, focusing on the correct handling of repeated headers. Using Go for backend and API development, Chris implemented a last-write-wins approach with support for appending headers as needed, reducing downstream conflicts and improving client interoperability. Comprehensive tests were added to validate robustness across edge cases, ensuring predictable cross-service communication. The work, committed to the wundergraph/cosmo repository, demonstrated depth in both problem analysis and solution design, emphasizing thorough testing and maintainability. Chris’s contributions improved the router’s reliability, reflecting strong skills in backend development and software testing.