Developed and integrated trailing-comma support into the JSON schema configuration for the biomejs/biome repository, targeting improved compatibility with popular code editors such as VSCode. This feature allowed users to include trailing commas in JSON configuration files, reducing editing friction and aligning the schema with common editor expectations. The implementation focused on a clear and minimal change surface, ensuring maintainability while enhancing the developer experience. The work leveraged skills in JSON schema design, Rust programming, and configuration management, resulting in a targeted update that addressed a specific pain point for users working with JSON configurations in modern development environments.