Native Histograms With Custom Buckets
summary
Proposal adds custom bucket support to Prometheus native histograms so classic histogram payloads become single time series native histograms by storing explicit bucket boundaries, producing an exact representation rather than an approximation. Implementation is landing across remote write v2 and Prometheus but remains off by default and labeled work in progress. Conversion happens at scrape time so no application changes are needed. Query semantics change: old per-bucket/count series no longer exist and queries change to the native histogram APIs.
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