- Introduce experimental Remote Write v2 (enabled by default, configurable via feature flag) with new metadata WAL support and future‑timestamp rejection
- Add new PromQL aggregation operators limitk() and limit_ratio(); improve PromQL parsing (underscores in literals, interchangeable float/duration literals, Kahan summation, native histogram optimizations)
- Deliver many TSDB, regex, service‑discovery, UI, and notifier enhancements along with a series of bug fixes across Remote Write/Read, Rules, Config, and CLI
2.54.0 / 2024-08-09
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