feat: add typed metric family descriptors by zeitlinger · Pull Request #2114 · prometheus/client_java · GitHub

Adds typed metric family descriptors and typed metadata support for the model snapshots.

This is the typed-descriptor branch for downstreams that want to provide registration-time metadata explicitly. The #1800 Collector/MultiCollector registration metadata hooks are already optional via default methods, so unmodified downstreams should not need this PR just to keep working.

This PR now also deprecates the fragmented registration metadata API (getPrometheusName(), getMetricType(), getLabelNames(), and getMetadata() plus the MultiCollector variants) in favor of getMetricFamilyDescriptor() / getMetricFamilyDescriptors(). The deprecated methods remain bridged by default implementations for compatibility.

Related validation:

test: validate Micrometer vanilla compatibility #2121 validates unmodified Micrometer independently of feat: add typed metric family descriptors #2114, against main + fix: restore reserved suffix stripping in PrometheusNaming.sanitizeMetricName() #2124.
test: validate Micrometer typed-descriptor compatibility #2123 validates a Micrometer branch that explicitly uses MetricFamilyDescriptor to implement the existing registration metadata hooks without invoking scrape/sample callbacks during registration.

Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

Opened draft validation PR #2121 to run the combined compatibility stack: opt-in typed descriptors, #2094 suffix sanitization, and the Micrometer compatibility workflow. This is intended as a proof/test PR so #2114 can stay focused.

Opened #2122 as the smaller alternative implementation for #2114: same typed descriptor API, but legacy snapshot builders remain on plain metadata so the new descriptor behavior is opt-in. #2121 remains the combined validation PR with #2094 + Micrometer compatibility.

Opened #2122 as the smaller alternative implementation for #2114: same typed descriptor API, but legacy snapshot builders remain on plain metadata so the new descriptor behavior is opt-in. #2121 remains the combined validation PR with #2094 + Micrometer compatibility.

closed that

Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

Pull request overview

This PR introduces a typed, registration-time metadata API (MetricFamilyDescriptor) for collectors and snapshot builders, and updates the registry and core metrics to use/bridge this API while deprecating the older fragmented metadata hooks.

Changes:

Add MetricFamilyDescriptor (typed metric family descriptors) and wire it into Collector/MultiCollector via new default methods that bridge deprecated registration metadata methods.
Add typed metadata derivation for Counter/Info snapshots (suffix stripping + original/exposition-base name tracking) via MetricMetadataSupport, and update snapshot tests accordingly.
Update PrometheusRegistry registration-time validation to prefer typed descriptors, and deprecate legacy registration metadata APIs across modules/examples.

Reviewed changes

Copilot reviewed 36 out of 36 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
prometheus-metrics-model/src/test/java/io/prometheus/metrics/model/snapshots/SnapshotTestUtil.java	Adds helper assertions for derived metadata fields.
prometheus-metrics-model/src/test/java/io/prometheus/metrics/model/snapshots/MetricFamilyDescriptorTest.java	New unit tests for MetricFamilyDescriptor behavior.
prometheus-metrics-model/src/test/java/io/prometheus/metrics/model/snapshots/InfoSnapshotTest.java	Updates expectations for derived metadata and stripped _info naming.
prometheus-metrics-model/src/test/java/io/prometheus/metrics/model/snapshots/GaugeSnapshotTest.java	Fixes test to use GaugeSnapshot and asserts derived metadata.
prometheus-metrics-model/src/test/java/io/prometheus/metrics/model/snapshots/CounterSnapshotTest.java	Adds derived-metadata assertions and counter typed-metadata test.
prometheus-metrics-model/src/test/java/io/prometheus/metrics/model/registry/PrometheusRegistryTest.java	Adds registry validation coverage using typed descriptors.
prometheus-metrics-model/src/test/java/io/prometheus/metrics/model/registry/OpenTelemetryExporterRegistryCompatibilityTest.java	Suppresses deprecation warnings for legacy API usage in tests.
prometheus-metrics-model/src/test/java/io/prometheus/metrics/model/registry/MultiCollectorNameFilterTest.java	Suppresses deprecation warnings for legacy API usage in tests.
prometheus-metrics-model/src/main/java/io/prometheus/metrics/model/snapshots/MetricSnapshot.java	Allows subclasses to override metadata building and routes through metadata support.
prometheus-metrics-model/src/main/java/io/prometheus/metrics/model/snapshots/MetricMetadataSupport.java	New internal helper for typed metadata derivation (counter/info).
prometheus-metrics-model/src/main/java/io/prometheus/metrics/model/snapshots/MetricFamilyDescriptor.java	New typed descriptor API + builders per metric type.
prometheus-metrics-model/src/main/java/io/prometheus/metrics/model/snapshots/InfoSnapshot.java	Uses typed metadata derivation for Info snapshots.
prometheus-metrics-model/src/main/java/io/prometheus/metrics/model/snapshots/CounterSnapshot.java	Uses typed metadata derivation for Counter snapshots.
prometheus-metrics-model/src/main/java/io/prometheus/metrics/model/registry/PrometheusRegistry.java	Switches registration-time validation to use typed descriptors; keeps deprecated fallback for scraping.
prometheus-metrics-model/src/main/java/io/prometheus/metrics/model/registry/MultiCollector.java	Adds getMetricFamilyDescriptors() and deprecates fragmented metadata methods.
prometheus-metrics-model/src/main/java/io/prometheus/metrics/model/registry/Collector.java	Adds getMetricFamilyDescriptor() and deprecates fragmented metadata methods.
prometheus-metrics-instrumentation-guava/src/test/java/io/prometheus/metrics/instrumentation/guava/CacheMetricsCollectorTest.java	Suppresses deprecation warnings.
prometheus-metrics-instrumentation-guava/src/main/java/io/prometheus/metrics/instrumentation/guava/CacheMetricsCollector.java	Deprecates getPrometheusNames() in favor of typed descriptors.
prometheus-metrics-instrumentation-caffeine/src/test/java/io/prometheus/metrics/instrumentation/caffeine/CacheMetricsCollectorTest.java	Suppresses deprecation warnings.
prometheus-metrics-instrumentation-caffeine/src/main/java/io/prometheus/metrics/instrumentation/caffeine/CacheMetricsCollector.java	Deprecates legacy constructor and getPrometheusNames().
prometheus-metrics-exposition-textformats/src/test/java/io/prometheus/metrics/expositionformats/DuplicateNamesExpositionTest.java	Suppresses deprecation warnings.
prometheus-metrics-exposition-textformats/src/main/java/io/prometheus/metrics/expositionformats/PrometheusTextFormatWriter.java	Deprecates setTimestampsInMs.
prometheus-metrics-exposition-formats/src/test/java/io/prometheus/metrics/expositionformats/DuplicateNamesProtobufTest.java	Suppresses deprecation warnings.
prometheus-metrics-core/src/test/java/io/prometheus/metrics/core/metrics/MetricWithFixedMetadataTest.java	New test validating typed-descriptor bridging for legacy overrides.
prometheus-metrics-core/src/main/java/io/prometheus/metrics/core/metrics/SummaryWithCallback.java	Uses metadata field directly; deprecates getMetricType().
prometheus-metrics-core/src/main/java/io/prometheus/metrics/core/metrics/Summary.java	Uses metadata field directly; deprecates getMetricType().
prometheus-metrics-core/src/main/java/io/prometheus/metrics/core/metrics/StateSet.java	Uses metadata field directly; deprecates getMetricType().
prometheus-metrics-core/src/main/java/io/prometheus/metrics/core/metrics/StatefulMetric.java	Uses metadata field directly for error messages and properties.
prometheus-metrics-core/src/main/java/io/prometheus/metrics/core/metrics/MetricWithFixedMetadata.java	Adds typed descriptor override + deprecates fragmented metadata methods.
prometheus-metrics-core/src/main/java/io/prometheus/metrics/core/metrics/Info.java	Uses metadata field directly; deprecates getMetricType().
prometheus-metrics-core/src/main/java/io/prometheus/metrics/core/metrics/Histogram.java	Uses metadata field directly; deprecates getMetricType().
prometheus-metrics-core/src/main/java/io/prometheus/metrics/core/metrics/GaugeWithCallback.java	Uses metadata field directly; deprecates getMetricType().
prometheus-metrics-core/src/main/java/io/prometheus/metrics/core/metrics/Gauge.java	Uses metadata field directly; deprecates getMetricType().
prometheus-metrics-core/src/main/java/io/prometheus/metrics/core/metrics/CounterWithCallback.java	Uses metadata field directly; deprecates getMetricType().
prometheus-metrics-core/src/main/java/io/prometheus/metrics/core/metrics/Counter.java	Uses metadata field directly; deprecates getMetricType().
examples/example-exporter-multi-target/src/main/java/io/prometheus/metrics/examples/multitarget/SampleMultiCollector.java	Deprecates legacy registration-name hook in example.

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Draft validation PR for the unmodified Micrometer compatibility story. This intentionally does **not** depend on #2114. Vanilla Micrometer does not use the typed descriptor API and does not implement the #1800 registration metadata hooks, so this PR validates the patch-compatible path independently of typed descriptors. This validates upstream `micrometer-metrics/micrometer@main` against: - current `main`, which already includes #2100 and #2124 (reserved suffix stripping in `PrometheusNaming.sanitizeMetricName()`). - Micrometer compatibility test tooling/workflow from zeitlinger#1. Local validation: - `mise run lint` - `MICROMETER_DIR=/tmp/micrometer-compat-vanilla-2124 mise run micrometer:test` --------- Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com> Co-authored-by: Jay DeLuca <jaydeluca4@gmail.com>

Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

Draft validation PR for the unmodified JMX Exporter compatibility story. This intentionally does **not** depend on #2114. Vanilla JMX Exporter does not use the typed descriptor API, so this PR validates the patch-compatible path independently of typed descriptors. This validates upstream `prometheus/jmx_exporter@main` against current `client_java` by installing local `io.prometheus` artifacts and running the JMX Exporter collector/common/javaagent/standalone Maven tests against them. Local validation: - `mise run jmx-exporter:test` - `mise run lint:fix` - `mise run lint` - `actionlint .github/workflows/jmx-exporter-compatibility.yml` --------- Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com> Co-authored-by: Doug Hoard <dhoard@users.noreply.github.com>

Draft validation PR for the downstream opt-in path. Depends on #2114 for the typed descriptor implementation. This branch is stacked on the #2114 head, so once #2114 lands this PR should shrink to only the Micrometer opt-in compatibility tooling. This validates Micrometer using the new descriptor API, defaulting to: - `MICROMETER_REPOSITORY=zeitlinger/micrometer` - `MICROMETER_REF=feat/prometheus-client-opt-in` That Micrometer branch provides `MetricFamilyDescriptor` metadata from the Prometheus registry without invoking scrape/sample callbacks during registration. Local validation: - `mise run lint` - `MICROMETER_DIR=/tmp/micrometer-compat-optin mise run micrometer:test` --------- Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

🤖 I have created a release *beep* *boop* --- ## [1.7.0](v1.6.1...v1.7.0) (2026-06-03) ### Features * Add StableApi marker and API diff check ([#2168](#2168)) ([768fd3a](768fd3a)) * add typed metric family descriptors ([#2114](#2114)) ([9c3b097](9c3b097)) * track api-diff baseline via Renovate and store diffs in docs/apidiffs ([#2174](#2174)) ([3adb890](3adb890)) ### Bug Fixes * **deps:** update dependency com.github.ben-manes.caffeine:caffeine to v3.2.4 ([#2088](#2088)) ([144eb61](144eb61)) * **deps:** update dependency io.dropwizard.metrics:metrics-core to v4.2.39 ([#2139](#2139)) ([5817d13](5817d13)) * **deps:** update dependency io.dropwizard.metrics5:metrics-core to v5.0.7 ([#2140](#2140)) ([261c451](261c451)) * **deps:** update dependency io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha to v2.28.0-alpha ([#2126](#2126)) ([b62b5d0](b62b5d0)) * **deps:** update dependency io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha to v2.28.0-alpha ([#2127](#2127)) ([e11ce3d](e11ce3d)) * **deps:** update dependency io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha to v2.28.1-alpha ([#2132](#2132)) ([b09be38](b09be38)) * **deps:** update dependency io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha to v2.28.1-alpha ([#2133](#2133)) ([a241c16](a241c16)) * **deps:** update dependency org.apache.tomcat.embed:tomcat-embed-core to v11.0.22 ([#2099](#2099)) ([22125c5](22125c5)) * **deps:** update jetty monorepo to v12.1.10 ([#2169](#2169)) ([ddd3991](ddd3991)) * **deps:** update jetty monorepo to v12.1.9 ([#2102](#2102)) ([04bee70](04bee70)) * **deps:** update protobuf ([#2129](#2129)) ([320538a](320538a)) * Reduce allocations for classic histogram buckets ([#2081](#2081)) ([edd160a](edd160a)) * restore legacy suffix compatibility ([#2100](#2100)) ([b2ae70f](b2ae70f)) * restore reserved suffix stripping in `PrometheusNaming.sanitizeMetricName()` ([#2124](#2124)) ([2d0f508](2d0f508)) ### Performance Improvements * Refactored sorting to use optimized sort algorithms ([#2161](#2161)) ([25b94fc](25b94fc)) ### Documentation * clarify downstream adapter validation requirements ([#2101](#2101)) ([ef8c75c](ef8c75c)) * Document OM2 ([#2059](#2059)) ([45d753c](45d753c)) * document PushGateway shading workaround ([#2106](#2106)) ([8ca0eb8](8ca0eb8)) --- > [!IMPORTANT] > Close and reopen this PR to trigger CI checks. Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com> Co-authored-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

Draft validation PR for the unmodified Micrometer compatibility story. This intentionally does **not** depend on #2114. Vanilla Micrometer does not use the typed descriptor API and does not implement the #1800 registration metadata hooks, so this PR validates the patch-compatible path independently of typed descriptors. This validates upstream `micrometer-metrics/micrometer@main` against: - current `main`, which already includes #2100 and #2124 (reserved suffix stripping in `PrometheusNaming.sanitizeMetricName()`). - Micrometer compatibility test tooling/workflow from zeitlinger#1. Local validation: - `mise run lint` - `MICROMETER_DIR=/tmp/micrometer-compat-vanilla-2124 mise run micrometer:test` --------- Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com> Co-authored-by: Jay DeLuca <jaydeluca4@gmail.com> Signed-off-by: Jay DeLuca <jaydeluca4@gmail.com>

Adds typed metric family descriptors and typed metadata support for the model snapshots. This is the typed-descriptor branch for downstreams that want to provide registration-time metadata explicitly. The #1800 Collector/MultiCollector registration metadata hooks are already optional via default methods, so unmodified downstreams should not need this PR just to keep working. This PR now also deprecates the fragmented registration metadata API (`getPrometheusName()`, `getMetricType()`, `getLabelNames()`, and `getMetadata()` plus the `MultiCollector` variants) in favor of `getMetricFamilyDescriptor()` / `getMetricFamilyDescriptors()`. The deprecated methods remain bridged by default implementations for compatibility. Related validation: - #2121 validates unmodified Micrometer independently of #2114, against `main` + #2124. - #2123 validates a Micrometer branch that explicitly uses `MetricFamilyDescriptor` to implement the existing registration metadata hooks without invoking scrape/sample callbacks during registration. --------- Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com> Signed-off-by: Jay DeLuca <jaydeluca4@gmail.com>

Draft validation PR for the unmodified JMX Exporter compatibility story. This intentionally does **not** depend on #2114. Vanilla JMX Exporter does not use the typed descriptor API, so this PR validates the patch-compatible path independently of typed descriptors. This validates upstream `prometheus/jmx_exporter@main` against current `client_java` by installing local `io.prometheus` artifacts and running the JMX Exporter collector/common/javaagent/standalone Maven tests against them. Local validation: - `mise run jmx-exporter:test` - `mise run lint:fix` - `mise run lint` - `actionlint .github/workflows/jmx-exporter-compatibility.yml` --------- Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com> Co-authored-by: Doug Hoard <dhoard@users.noreply.github.com> Signed-off-by: Jay DeLuca <jaydeluca4@gmail.com>

Draft validation PR for the downstream opt-in path. Depends on #2114 for the typed descriptor implementation. This branch is stacked on the #2114 head, so once #2114 lands this PR should shrink to only the Micrometer opt-in compatibility tooling. This validates Micrometer using the new descriptor API, defaulting to: - `MICROMETER_REPOSITORY=zeitlinger/micrometer` - `MICROMETER_REF=feat/prometheus-client-opt-in` That Micrometer branch provides `MetricFamilyDescriptor` metadata from the Prometheus registry without invoking scrape/sample callbacks during registration. Local validation: - `mise run lint` - `MICROMETER_DIR=/tmp/micrometer-compat-optin mise run micrometer:test` --------- Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com> Signed-off-by: Jay DeLuca <jaydeluca4@gmail.com>

🤖 I have created a release *beep* *boop* --- ## [1.7.0](v1.6.1...v1.7.0) (2026-06-03) ### Features * Add StableApi marker and API diff check ([#2168](#2168)) ([768fd3a](768fd3a)) * add typed metric family descriptors ([#2114](#2114)) ([9c3b097](9c3b097)) * track api-diff baseline via Renovate and store diffs in docs/apidiffs ([#2174](#2174)) ([3adb890](3adb890)) ### Bug Fixes * **deps:** update dependency com.github.ben-manes.caffeine:caffeine to v3.2.4 ([#2088](#2088)) ([144eb61](144eb61)) * **deps:** update dependency io.dropwizard.metrics:metrics-core to v4.2.39 ([#2139](#2139)) ([5817d13](5817d13)) * **deps:** update dependency io.dropwizard.metrics5:metrics-core to v5.0.7 ([#2140](#2140)) ([261c451](261c451)) * **deps:** update dependency io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha to v2.28.0-alpha ([#2126](#2126)) ([b62b5d0](b62b5d0)) * **deps:** update dependency io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha to v2.28.0-alpha ([#2127](#2127)) ([e11ce3d](e11ce3d)) * **deps:** update dependency io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha to v2.28.1-alpha ([#2132](#2132)) ([b09be38](b09be38)) * **deps:** update dependency io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha to v2.28.1-alpha ([#2133](#2133)) ([a241c16](a241c16)) * **deps:** update dependency org.apache.tomcat.embed:tomcat-embed-core to v11.0.22 ([#2099](#2099)) ([22125c5](22125c5)) * **deps:** update jetty monorepo to v12.1.10 ([#2169](#2169)) ([ddd3991](ddd3991)) * **deps:** update jetty monorepo to v12.1.9 ([#2102](#2102)) ([04bee70](04bee70)) * **deps:** update protobuf ([#2129](#2129)) ([320538a](320538a)) * Reduce allocations for classic histogram buckets ([#2081](#2081)) ([edd160a](edd160a)) * restore legacy suffix compatibility ([#2100](#2100)) ([b2ae70f](b2ae70f)) * restore reserved suffix stripping in `PrometheusNaming.sanitizeMetricName()` ([#2124](#2124)) ([2d0f508](2d0f508)) ### Performance Improvements * Refactored sorting to use optimized sort algorithms ([#2161](#2161)) ([25b94fc](25b94fc)) ### Documentation * clarify downstream adapter validation requirements ([#2101](#2101)) ([ef8c75c](ef8c75c)) * Document OM2 ([#2059](#2059)) ([45d753c](45d753c)) * document PushGateway shading workaround ([#2106](#2106)) ([8ca0eb8](8ca0eb8)) --- > [!IMPORTANT] > Close and reopen this PR to trigger CI checks. Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com> Co-authored-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com> Signed-off-by: Jay DeLuca <jaydeluca4@gmail.com>

## Summary - update `getting-started/registry.md` to recommend `getMetricFamilyDescriptor()` for custom collectors, with a short example and a note that the fragmented `getPrometheusName()/getMetricType()/getLabelNames()/getMetadata()` methods are deprecated but still bridged - update `internals/model.md` to reference `getMetricFamilyDescriptor()` - add `internals/stability.md` covering `@StableApi`, `mise run api-diff`, the baseline tracked in `pom.xml` (Renovate-managed) with diffs under `docs/apidiffs/`, and the `breaking-api-change-accepted` label Covers user-facing changes since v1.6.1: - #2114 — typed metric family descriptors - #2168 — `@StableApi` marker and API diff check ## Test plan - [ ] preview rendered docs locally - [ ] verify intra-doc links resolve Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

zeitlinger added 3 commits May 13, 2026 12:14

feat: add typed metric family descriptors

f96c48d

Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

style: apply formatter fixes

a1be08d

Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

test: cover typed family descriptor variants

64933d2

Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

zeitlinger mentioned this pull request May 18, 2026

feat: add opt-in typed metric family descriptors #2122

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zeitlinger mentioned this pull request May 18, 2026

test: validate Micrometer typed-descriptor compatibility #2123

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zeitlinger marked this pull request as ready for review May 18, 2026 14:52

zeitlinger requested review from dhoard, fstab and jaydeluca as code owners May 18, 2026 14:52

zeitlinger force-pushed the feat/typed-metric-family-descriptor branch 2 times, most recently from 1dffd50 to 702abc2 Compare May 18, 2026 15:58

feat: deprecate fragmented metric metadata API

21bc821

Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

zeitlinger force-pushed the feat/typed-metric-family-descriptor branch from 702abc2 to 21bc821 Compare May 18, 2026 16:50

Merge branch 'main' into feat/typed-metric-family-descriptor

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jonatan-ivanov mentioned this pull request May 21, 2026

Bump io.prometheus:prometheus-metrics-bom from 1.5.1 to 1.6.1 micrometer-metrics/micrometer#7438

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fix: address typed descriptor review feedback

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zeitlinger requested a review from jaydeluca June 1, 2026 11:23

Merge branch 'main' into feat/typed-metric-family-descriptor

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zeitlinger mentioned this pull request Jun 1, 2026

test: validate JMX Exporter compatibility #2167

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zeitlinger merged commit 9c3b097 into prometheus:main Jun 1, 2026
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zeitlinger deleted the feat/typed-metric-family-descriptor branch June 1, 2026 16:52

github-actions Bot mentioned this pull request Jun 1, 2026

chore(main): release 1.7.0 #2092

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docs: cover typed family descriptors and @StableApi since v1.6.1 #2181

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feat: add typed metric family descriptors by zeitlinger · Pull Request #2114 · prometheus/client_java · GitHub

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feat: add typed metric family descriptors#2114
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feat: add typed metric family descriptors by zeitlinger · Pull Request #2114 · prometheus/client_java · GitHub

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feat: add typed metric family descriptors - #2114

feat: add typed metric family descriptors#2114zeitlinger merged 7 commits intoprometheus:mainprometheus/client_java:mainfrom zeitlinger:feat/typed-metric-family-descriptorzeitlinger/client_java:feat/typed-metric-family-descriptorCopy head branch name to clipboard

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feat: add typed metric family descriptors#2114
zeitlinger merged 7 commits into
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