During August 2025, Jaeger developed a custom error tracking and reporting API for the rybbit-io/rybbit repository, introducing a manual error reporting surface via window.rybbit.error(). This feature allows developers to report errors with associated properties, enhancing observability and control over error handling in frontend applications. Jaeger implemented the API using JavaScript and TypeScript, providing comprehensive documentation and type definitions to support adoption and ensure type safety. The work focused on API design and frontend development, delivering a well-documented, opt-in solution for error reporting. The depth of the implementation reflects careful attention to usability and integration within existing workflows.