chore(main): release 1.8.0 (#2192)

🤖 I have created a release *beep* *boop*
---


##
[1.8.0](v1.7.0...v1.8.0)
(2026-06-11)


### Features

* Add custom labels to exemplars
([#2191](#2191))
([fd1f3e8](fd1f3e8))
* add MetricMetadata.Builder, deprecate wide constructors
([#2202](#2202))
([adeef32](adeef32))


### Bug Fixes

* Avoid unnuecessary exemplar allocations
([#2209](#2209))
([0b6a91f](0b6a91f))
* **deps:** update spring boot to v4.1.0
([#2213](#2213))
([df25c08](df25c08))


### Documentation

* cover typed family descriptors and @stableAPI since v1.6.1
([#2181](#2181))
([7ca9f99](7ca9f99))

---
> [!IMPORTANT]
> Close and reopen this PR to trigger CI checks.

---------

Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

chore(main): release 1.7.0 (#2092)

🤖 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))

---
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chore(main): release 1.6.1 (#2064)

🤖 I have created a release *beep* *boop*
---


##
[1.6.1](v1.6.0...v1.6.1)
(2026-04-27)


### Bug Fixes

* Preserve original metric names in OM2 output
([#2058](#2058))
([59a7a6d](59a7a6d))


### Documentation

* clarify 1.6.0 release notes
([#2062](#2062))
([9e5d591](9e5d591))
* Document semantic PR title guidance
([#2060](#2060))
([7277889](7277889))

---
> [!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>

chore(main): release 1.6.0 (#1983)

🤖 I have created a release *beep* *boop*
---


##
[1.6.0](v1.5.1...v1.6.0)
(2026-04-25)


### Features

* Add logic for handling content negotation flag with OM2
([#1986](#1986))
([0fa1ad7](0fa1ad7))
* Add OM2 native histogram text output
([#2042](#2042))
([dec8e5b](dec8e5b))
* add OTel preserve_names for scrape-time suffix handling
([#1956](#1956))
([f794288](f794288))
* compositeValues and exemplarCompliance flags for OM2 writer
([#1991](#1991))
([ff48ae8](ff48ae8))
* move suffix handling to scrape time
([#1955](#1955))
([5a5106c](5a5106c))
* OM2 writer outputs names as provided, no suffix appending
([#1957](#1957))
([5ce2b57](5ce2b57))


### Bug Fixes

* **deps:** update dependency com.google.guava:guava to v33.6.0-jre
([#2021](#2021))
([1382693](1382693))
* **deps:** update dependency commons-io:commons-io to v2.22.0
([#2044](#2044))
([9e05c1d](9e05c1d))
* **deps:** update dependency
io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha
to v2.27.0-alpha
([#2022](#2022))
([30ac534](30ac534))
* **deps:** update dependency
io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha
to v2.27.0-alpha
([#2023](#2023))
([2d51a32](2d51a32))
* **deps:** update dependency io.prometheus:prometheus-metrics-bom to
v1.5.1 ([#2004](#2004))
([650ce4b](650ce4b))
* **deps:** update dependency org.apache.tomcat.embed:tomcat-embed-core
to v11.0.21
([#2005](#2005))
([7a36df7](7a36df7))
* **deps:** update dependency
org.springframework.boot:spring-boot-starter-parent to v4.0.5
([#2006](#2006))
([0106c18](0106c18))
* **deps:** update dependency
org.springframework.boot:spring-boot-starter-parent to v4.0.6
([#2046](#2046))
([40a9db8](40a9db8))
* **deps:** update jetty monorepo to v12.1.8
([#2007](#2007))
([acab5b2](acab5b2))
* **deps:** update protobuf
([#2024](#2024))
([8e2214e](8e2214e))
* pass release tag as input to deploy workflow
([#1982](#1982))
([165c921](165c921))
* pin grafana/otel-lgtm to 0.7.2 in OATs acceptance test
([#1992](#1992))
([f17ad9a](f17ad9a))
* Relax metric name validation in Dropwizard5
([#1985](#1985))
([deb782f](deb782f))
* stabilize flaky timer and thread count tests
([#1973](#1973))
([ce5867b](ce5867b))
* Tighten OM2 summary and start timestamp output
([#2041](#2041))
([5699469](5699469))
* trigger Maven deploy from release-please via workflow_dispatch
([#1981](#1981))
([698f956](698f956))

---
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chore(main): release 1.5.1 (#1979)

🤖 I have created a release *beep* *boop*
---


##
[1.5.1](v1.5.0...v1.5.1)
(2026-03-20)


### Bug Fixes

* **deps:** update dependency io.prometheus:prometheus-metrics-bom to
v1.5.0 ([#1877](#1877))
([043fc57](043fc57))
* **deps:** update dependency
org.springframework.boot:spring-boot-starter-parent to v4.0.3
([#1900](#1900))
([0d800d0](0d800d0))
* **deps:** update jetty monorepo to v12.1.7
([#1932](#1932))
([5bd3b79](5bd3b79))
* **deps:** update junit-framework monorepo to v6.0.3
([#1880](#1880))
([05ad751](05ad751))
* exclude standalone examples from `mise run format`
([#1931](#1931))
([537fb88](537fb88))
* fix release-please PR title pattern and permissions
([#1978](#1978))
([d737978](d737978))
* Handle empty datapoints in otel exporter
([#1898](#1898))
([59c8552](59c8552))
* inline set-version logic in build-release.sh
([#1884](#1884))
([c050435](c050435))
* reduce lychee retries to avoid compounding GitHub 429s
([#1940](#1940))
([cc17d6e](cc17d6e))
* remove version manipulation from build-release.sh
([#1886](#1886))
([93e2b6d](93e2b6d))
* trigger Maven deploy on release-please published events
([#1966](#1966))
([643d0e7](643d0e7))
* use /tree/ instead of /blob/ for directory URL
([#1944](#1944))
([b81332e](b81332e))
* use maven release type for release-please
([#1967](#1967))
([ff3bd2d](ff3bd2d))


### Documentation

* document DCO sign-off requirement for contributions
([#1937](#1937))
([0860e77](0860e77))

---
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chore(deps): update dependency lychee to v0.23.0 (#1874)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [lychee](https://redirect.github.com/lycheeverse/lychee) | minor |
`0.22.0` → `0.23.0` |

---

### Release Notes

<details>
<summary>lycheeverse/lychee (lychee)</summary>

###
[`v0.23.0`](https://redirect.github.com/lycheeverse/lychee/releases/tag/lychee-v0.23.0)

[Compare
Source](https://redirect.github.com/lycheeverse/lychee/compare/lychee-v0.22.0...lychee-v0.23.0)

##### Added

- per-host caching
([#&#8203;1974](https://redirect.github.com/lycheeverse/lychee/pull/1974))
- implement per-host rate limiting and statistics
([#&#8203;1929](https://redirect.github.com/lycheeverse/lychee/pull/1929))

##### Fixed

- CacheableResponse should only download file when needed
([#&#8203;2035](https://redirect.github.com/lycheeverse/lychee/pull/2035))
- Combine host stats with response stats
([#&#8203;1975](https://redirect.github.com/lycheeverse/lychee/pull/1975))

##### Other

- delete leftover openssl sentence in readme
- Speed up slow tests
([#&#8203;2019](https://redirect.github.com/lycheeverse/lychee/pull/2019))
- *(deps)* bump the dependencies group with 2 updates
- Improve README.md UX
([#&#8203;2029](https://redirect.github.com/lycheeverse/lychee/pull/2029))
- Replace OpenSSL with rustls
([#&#8203;1928](https://redirect.github.com/lycheeverse/lychee/pull/1928))
- Replace check-if-email-exists with mailify
([#&#8203;1985](https://redirect.github.com/lycheeverse/lychee/pull/1985))
- Redirect hint
([#&#8203;2020](https://redirect.github.com/lycheeverse/lychee/pull/2020))
- Update to reqwest 0.13.1 & cargo update
- *(deps)* bump the dependencies group across 1 directory with 4 updates
- Use absolute instead of canonicalize for relative root-dir
([#&#8203;2008](https://redirect.github.com/lycheeverse/lychee/pull/2008))
- Log successful responses only for Debug and Trace
- Only show redirect details in verbose mode
- Show status code in redirect list
- Use u8 instead of i8 for log level values
- Update comparison table
([#&#8203;1997](https://redirect.github.com/lycheeverse/lychee/pull/1997))
- Rejected urls
([#&#8203;1990](https://redirect.github.com/lycheeverse/lychee/pull/1990))
- Accept ranges
([#&#8203;1989](https://redirect.github.com/lycheeverse/lychee/pull/1989))
- *(deps)* bump the dependencies group with 5 updates
([#&#8203;1988](https://redirect.github.com/lycheeverse/lychee/pull/1988))
- *(deps)* bump the dependencies group with 4 updates
([#&#8203;1978](https://redirect.github.com/lycheeverse/lychee/pull/1978))
- *(deps)* bump the dependencies group with 4 updates
([#&#8203;1973](https://redirect.github.com/lycheeverse/lychee/pull/1973))
- *(docs)* update TOC
- Improve wikilink parsing and checking
([#&#8203;1799](https://redirect.github.com/lycheeverse/lychee/pull/1799))
- Specify that Scoop installation is for Windows
([#&#8203;1969](https://redirect.github.com/lycheeverse/lychee/pull/1969))
- Extract record\_cache\_event & skip mail caching
- Add tldr-pages link to README
([#&#8203;1963](https://redirect.github.com/lycheeverse/lychee/pull/1963))
- *(deps)* bump the dependencies group across 1 directory with 3 updates
([#&#8203;1961](https://redirect.github.com/lycheeverse/lychee/pull/1961))
- Extract URLs from CSS
([#&#8203;1956](https://redirect.github.com/lycheeverse/lychee/pull/1956))

</details>

---

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Automerge - At any time (no schedule defined).

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♻ **Rebasing**: Whenever PR is behind base branch, or you tick the
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🔕 **Ignore**: Close this PR and you won't be reminded about this update
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add sum and count for DistributionDataPoint (#1669)

Fixes #1610

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

fix build (#1652)

because error prone requires jdk 21

---------

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

add missing builder method for escaping scheme (#1518)

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

UTF-8 support in metric and label names (#1255)

Adds UTF-8 support for metric and label names.

These changes are based on the work done on the Prometheus common
libraries [here](prometheus/common#537) and
[here](prometheus/common#570)

- The `prometheus-metrics-exposition-formats` module will use the new
quoting syntax `{"foo"}` iff the metric does not conform to the legacy
name format (`foo{}`)
- The `prometheus-metrics-model` module has a new flag
(`nameValidationScheme`) that determines if validation is done using the
legacy or the UTF-8 scheme. This flag can be set via a property in the
properties file.
- Scrapers can announce via content negotiation that they support UTF-8
names by adding `escaping=allow-utf-8` in the Accept header. In cases
where UTF-8 is not available, metric providers can be configured to
escape names in a few different ways: values (`U__` UTF value escaping
for perfect round-tripping), underscores (all invalid chars become `_`),
dots (dots become `_dot_`, `_` becomes `__`, all other values become
`___`). Escaping has a global default
(`PrometheusNaming.DEFAULT_ESCAPING_SCHEME`) or can also be specified in
Accept header with the `escaping=` term, which can be `allow-utf-8` (for
UTF-8-compatible), `underscores`, `dots`, or `values`.
This should still be a noop for existing configurations because scrapers
will not be passing the escaping key in the Accept header. Existing
functionality is maintained.
- The `prometheus-metrics-exporter-pushgateway` module will
[escape](https://github.com/prometheus/proposals/blob/main/proposals/2023-08-21-utf8.md#text-escaping)
UTF-8 grouping keys in the URL path used when pushing metrics (see
prometheus/pushgateway#689)

Work towards prometheus/prometheus#13095

---------

Signed-off-by: Federico Torres <federico.torres@grafana.com>
Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>
Co-authored-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>