During March 2025, work focused on enhancing the nestjs/nest repository by developing a RouteSchema decorator for the Fastify adapter. This feature allowed developers to attach custom JSON schemas directly to Fastify routes, improving both request validation and data handling by associating explicit schemas with route handlers. The implementation introduced a new metadata key and integrated schema support into route options, while also providing a dedicated decorator for ergonomic usage. Built using TypeScript and leveraging skills in API and backend development, the contribution addressed the need for clearer schema association in Fastify routes, resulting in more robust and maintainable backend code.