During September 2025, Echo Off updated the Umami Browser API surface in the grafana/k6-DefinitelyTyped repository, focusing on improving user identification and analytics integration. They revised the identify function to require a unique ID as the first argument, with optional event data, and changed the track function’s return type from Promise<string> to Promise<void> to clarify its semantics. Working primarily with TypeScript, API design, and type definitions, Echo Off enhanced typing consistency and reduced ambiguity for downstream consumers. The work demonstrated careful attention to type safety and integration friendliness, supporting analytics standardization and facilitating cleaner adoption across related TypeScript projects.