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Stabilize Prometheus Classic Histogram -> OTLP Explicit Histogram#4874

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ArthurSens wants to merge 1 commit intoopen-telemetry:mainfrom
ArthurSens:prom-stabilize-classic-histogram
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Stabilize Prometheus Classic Histogram -> OTLP Explicit Histogram#4874
ArthurSens wants to merge 1 commit intoopen-telemetry:mainfrom
ArthurSens:prom-stabilize-classic-histogram

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Fixes #4745

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Stabilizes the transformation of Prometheus Classic Histograms into OTLP Explicit Histograms.

For non-trivial changes, follow the change proposal process.

  • Related issues #
  • Related OTEP(s) #
  • Links to the prototypes (when adding or changing features)
  • CHANGELOG.md file updated for non-trivial changes
    • For trivial changes, include [chore] in the PR title to skip the changelog check
  • Spec compliance matrix updated if necessary

@ArthurSens ArthurSens requested review from a team as code owners February 4, 2026 19:45
Signed-off-by: Arthur Silva Sens <arthursens2005@gmail.com>
@ArthurSens ArthurSens force-pushed the prom-stabilize-classic-histogram branch from b3dae2d to 6941340 Compare February 4, 2026 19:46
**Status**: [Stable](../document-status.md)

A [Prometheus Histogram](https://prometheus.io/docs/instrumenting/exposition_formats/#basic-info) MUST be converted to an OTLP Histogram.
A [Prometheus Histogram](https://github.com/prometheus/OpenMetrics/blob/v1.0.0/specification/OpenMetrics.md#histogram) MUST be converted to an OTLP Histogram.
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Suggested change
A [Prometheus Histogram](https://github.com/prometheus/OpenMetrics/blob/v1.0.0/specification/OpenMetrics.md#histogram) MUST be converted to an OTLP Histogram.
A [Prometheus Histogram](https://github.com/prometheus/OpenMetrics/blob/v1.0.0/specification/OpenMetrics.md#histogram) MUST be converted to an OTLP Explicit Histogram.

I'm wondering if I should be very specific here 🤔

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[prometheus] Stabilize Prometheus -> OTLP: Histograms

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