During February 2026, Nils co-authored a feature for the valhalla/valhalla repository that exposed start and end OpenStreetMap node IDs within trace attributes, enhancing the Valhalla routing engine’s geospatial tracing and debugging capabilities. The work involved C++ development focused on updating core edge-attributes logic, aligning protocol definitions, and revising API documentation to support the new fields. By enabling downstream analytics and clearer routing scenario debugging, Nils addressed traceability challenges in geospatial data handling. The feature was delivered without major bug fixes, reflecting a targeted engineering effort that demonstrated depth in API design and collaborative development within a complex codebase.