Worked on enhancing the microsoft/json-schemas repository by designing and implementing a JSON Schema specifically for map-like data structures. Focused on defining schemas that accurately represent keys, values, and types, the work included iterative refinements to improve metadata handling and ensure consistency across schema definitions. Applied schema definition skills to introduce and standardize the use of dollar sign prefixes, facilitating clearer schema interpretation for downstream consumers. The approach emphasized incremental refactoring and careful management of schema metadata, resulting in improved data validation for dynamic map data. Utilized JSON and JSON Schema technologies throughout, with attention to maintainability and clarity in schema design.