feat(metrics): Implement exemplar metrics - #239

Draft

ethanolchik wants to merge 29 commits into

cloudflare:mainfrom

ethanolchik:metrics/exemplar-metrics

Commits on Jul 21, 2026

Commits on Jul 23, 2026

Commits on Jul 27, 2026

feat(metrics): expose Histogram::snapshot
ethanolchik
committed
fix(metrics): report native histogram config panics at the caller
ethanolchik
committed
feat(metrics): add collection pipeline
ethanolchik
committed
feat(metrics): wire up protobuf and text encoders
ethanolchik
committed
test(metrics): cover legacy info metric encoding
ethanolchik
committed
docs(metrics-registry): clarify that EncodeMetric::encode must emit complete, non-empty names
ethanolchik
committed
refactor(metrics-registry): derive Debug for RegistrationMetadata
ethanolchik
committed
feat(metrics): encode summaries and gauge histograms
ethanolchik
committed
fix(metrics): omit the OpenMetrics help line when there is no help text
ethanolchik
committed
feat(metrics): validate and sanitize names, labels, and exemplars
ethanolchik
committed
refactor(metrics): add support for UTF-8 characters in metric & label names
ethanolchik
committed
fix(validation): remove duplicate assertions
ethanolchik
committed
test(metrics): cover validated summary and gauge histogram output
ethanolchik
committed
fix(metrics): quote label names only when they need UTF-8 syntax
ethanolchik
committed
feat(metrics): add exemplar metrics
ethanolchik
committed
test(metrics): update exemplar fixtures for UTF-8 names
ethanolchik
committed
refactor(metrics): reuse native histogram builder for exemplars
ethanolchik
committed

Commits on Jul 28, 2026