Guillermo N. developed an RPM Spec Language Server for the mason-org/mason-registry repository, focusing on enhancing syntax awareness, validation, and editor integration for RPM spec files. Leveraging the language server protocol and package management expertise, Guillermo implemented the feature using YAML for package metadata, ensuring clear documentation of name, description, homepage, license, and supported languages. The server was packaged for PyPI distribution, streamlining installation and future maintenance. This work addressed the need for standardized tooling in RPM spec authoring, reduced packaging errors, and supported contributor onboarding. The project was delivered as a cohesive, end-to-end solution within a single commit.