- Introduce Prometheus Agent mode for remote‑write‑only operation, enabled via `--enable-feature=agent`.
- Add new promtool command `check service-discovery` and UI search in metrics dropdown, plus parseDuration template function.
- Series of enhancements (TSDB ARM64, query optimizations, UI autocomplete tweaks) and bug fixes across TSDB, PromQL, UI, and service‑discovery.