In January 2025, Anne Brouwers Harries developed and delivered a public MetricIdentifier API for the mozilla/glean repository, focusing on enhancing API accessibility and traceability for consumers of glean’s Rust Language Binding. Anne designed a public trait in Rust, implemented it for relevant metric types, and ensured robust functionality by adding an integration test to verify end-to-end visibility of metric identifiers. This work addressed Bug 1934880 by providing a public interface for metric identifiers, supporting improved telemetry interoperability and downstream analytics. Anne’s contributions demonstrated depth in API design, Rust programming, and testing, resulting in a more accessible and verifiable API surface.