Danya worked on foundational schema improvements for the Wagenpark feature in the Amsterdam/amsterdam-schema repository, focusing on dataset versioning and service contract schema updates. Using JSON and schema definition skills, Danya repositioned a key attribute within the schema to facilitate future migrations and contract validation, enabling smoother evolution of the data model. The work established a versioning framework that supports backward-compatible changes and enhances traceability, laying the groundwork for governance and downstream integrations. Although the scope was limited to a single feature over one month, the changes addressed core requirements for contract enforcement and future-proofed Wagenpark-driven workflows within the repository.