Scala Releases Changelog – Watch Changelog

Uniform Changelog API

Access Scala Center changelog updates through our uniform API. Same JSON structure across all sources — no adapter-specific parsing needed.

API Endpoint

GET https://watchchangelog.com/api/v1/entries?source=scala.releases

Response Sample

{
  "source": "scala.releases",
  "vendor": "Scala Center",
  "id": "tag:github.com,2008:Repository/2888818/v2.12.21",
  "published_at": "2025-12-11T17:21:45.000Z",
  "title": "Scala 2.12.21",
  "url": "https://github.com/scala/scala/releases/tag/v2.12.21",
  "summary": "The Scala team at Akka is pleased to announce Scala 2.12.21. This release is compatible with JDK 25 LTS and also introduces preliminary support for JDK 26. The following are highlights of this release: JDK 25 and 26 support Compiling on JDK 25 is now supported #11028 Compiling on JDK 26 is also supported #11172 Note: compilation of Ordering subclasses (overriding min / max ) may fail on Java 26, see comment on #11175 New @uncheckedOverride annotation The new @uncheckedOverride annotation is equivalent to the override keyword, except that it allows to override nothing. This is useful when cross-building: a method may override or not, depending on the version of some dependency. #11175 GPG key change This release is signed with a different GPG key than previous Scala 2.12 releases. The new key is the same one used by Scala 3. #11158 More changes For the complete 2.12.21 change lists, see all merged PRs and all closed bugs . Compatibility As usual for our minor releases, Scala 2.12.21 is binary-compatible with the whole Scala 2.12 series. Contributors A big thank you to everyone who's helped improve Scala by reporting bugs, improving our documentation, spreading kindness in discussions around Scala, and submitting and reviewing pull requests! You are all magnificent. This release was brought to you by 9 contributors, according to git shortlog -sn --no-merges @ ^v2.12.20 . Thank you Seth Tisue, Lukas Rytz, A. P. Marki, Friendseeker, Matthias Kurz, NthPortal, Philippus Baalman, Scala Steward, dependabot[bot]. Thanks to Akka for their continued sponsorship of the Scala 2 team’s efforts. Akka offers commercial support for Scala. Scala 2.12 notes The release notes for Scala 2.12.0 have important information applicable to the whole 2.12 series. Obtaining Scala Scala releases are available through a variety of channels, including (but not limited to): Bump the using scala setting in your Scala-CLI project Bump the scalaVersion setting in your sbt or Mill project Download a distribution from scala-lang.org Obtain JARs via Maven Central",
  "tags": [
    "Scala Center",
    "scala.releases",
    "programming-language",
    "scala",
    "jvm"
  ]
}