- Replace the standard PromQL editor with a CodeMirror‑based one and add trigonometric functions, atan2 operator, and exemplar support in remote write.
- Add new service discovery integrations (PuppetDB, Uyuni) and security‑related HTTP headers, plus numerous enhancements such as proxy config, HTTP/2, deterministic aggregations, and alert/series limits.
- Fix bugs in backfill label handling, scrape label prefix conflicts, scrape loop restarts, TSDB sample deletion memory leak, and UI margin consistency.
2.31.0 / 2021-11-02
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Deprecate non‑true/all values for the stats query parameter on /api/v1/query and /api/v1/query_range, now returning a warning and slated for removal in the next major release.
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