During January 2026, Eric Sims developed a new templating capability for the martinvonz/jj repository, introducing the Timestamp::since(ts) function to compute human-friendly durations between timestamps. This feature was implemented as a template function in Rust, leveraging timestamp utilities and clean API design to improve the readability of time-based metrics in logs, dashboards, and user interfaces. By deriving a TimestampRange between two points in time, Eric enabled clearer reporting and reduced the need for manual calculations. The work demonstrated proficiency in Rust programming, backend development, and template development, with a focus on enhancing observability and supporting cross-team collaboration.