sbt Release Notes

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11 release notes curated from 1 source by the Releasebot Team. Last updated: Oct 18, 2026

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Oct 18, 2026
Date parsed from source:
Oct 18, 2026

First seen by Releasebot:
Oct 18, 2026
sbt

2.0.11

sbt releases a maintenance update that fixes SemanticDB permissions, resolver configuration, client and BSP connections, task output, test reporting, and compile hangs, while improving reliability across remote caching and logging.
🐛 bug fixes

fix: Fix AccessDeniedException writing SemanticDB by @eed3si9n in #9878

fix: Fixes .m2/settings.xml overriding sbtResolvers by @eed3si9n in #9828

fix: Keep accepting after a client fails by @kitbellew in #9691

fix: Fix task output lost by the thin client under CPU load by @eed3si9n in #9868

fix: Read all forked test output before reporting the fork's exit by @eugkhp in #9860

fix: Use Path.userHome to work around user.home returning ? by @eed3si9n in #9866

fix: Fail a gRPC batch read when a blob fails by @eugkhp in #9904

fix: Fix pipelined compile hanging when compile inputs fail by @jleider in #9896

fix: Workaround compiler-interface eviction when depending on the remote cache plugin by @eed3si9n in #9913

Make logging robust against closed sbtn by @eed3si9n in #9911

fix: Fix BSP connection getting dropped by @eed3si9n in #9911

behind the scenes

Update mima setting by @eed3si9n in #9869

Full Changelog: v2.0.10...v2.0.11
Original source
Oct 11, 2026
Date parsed from source:
Oct 11, 2026

First seen by Releasebot:
Oct 13, 2026
sbt

2.1.0-RC1

sbt releases 2.1.0-RC1 with Scala 3.9 metabuild support and Ivyless publishing, plus clearer test summaries, configurable test scheduling and caching, and broad performance improvements and bug fixes. Plugin compatibility changes mean builds must use the matching sbt and Scala versions.
Changes with compatibility implications

Metabuild is updated to Scala 3.9.

Apache Ivy is removed from the dependency.

Scala 3.9

sbt 2.1.0 updates the Scala version used by the metabuild to Scala 3.9.0.

Since both sbt 2.x and Scala 3.x are only backward compatible across minor versions, appropriate Scala version must be used for building sbt plugins. Also a plugin built using sbt 2.1.x will not work on sbt 2.0.x:
sbt 2.x Scala 3.x Plugin works on sbt 2.0.x 2.0.x 3.8.x ✅ 2.1.0 3.9.x ❌
Publishing

sbt 2.1.0 removes Apache Ivy from its transitive dependency, and implements Ivyless publishing.

This was contributed by @bitloi, @fury0928, @BrianHotopp, @mkurz, @stasimus, @jozanek, and @eed3si9n in #8686, #8866, #8894, #8975, #8988, #8996, #9069, #9463, and #9533, #9615, #9756, #9804, #9806, #9811, #9814 etc.

Test summary

When tests are executed, sbt 2.1.0 displays a test summary at the end, listing the failed test suites as follows:

[error] Test summary (2 test tasks failed): [error] a / Test / testQuick [error] com.example.a.TestA FAIL [error] b / Test / testQuick [error] com.example.b.TestB FAIL [error] [error] failed: total 4, failed 2, errors 0, passed 2, cached 2

Successful tests will display only a terse summary by default:

[info] passed: total 4, failed 0, errors 0, passed 4, cached 4

--test_summary=success can override the behavior to list the successful test as well. Test summary was contributed by @eed3si9n and @BrianHotopp in #9602 + #9214.

Test cache opt-out

sbt 2.1.0 can let you opt out of test result caching:

$ sbt test --cache_test_result=false

This was contributed by @anatoliykmetyuk in #9675.

workerMaxInstances and testTopology

sbt 2.1.0 adds new settings workerMaxInstances and testTopology to control test scheduling, especially of the forked tests. Use Global / workerMaxInstances to change the number of worker instances. The default is set to 2:

// or sbt -Dsbt.worker_max_instances=2 Global / workerMaxInstances := 2

Use the testTopology setting to control whether you want to split the test classes into multiple workers or keep them together. The default was changed to split to 2 groups:

Test / testTopology := TestTopology.subprojectSplit(2)

To keep all classes in a subproject on one worker instead, use:

Test / testTopology := TestTopology.subprojectExclusive

This was contributed by @eed3si9n in #9665

clean task

sbt 2.1.0 updates the clean task to act as a cache invalidator. Regardless of the cache state, running clean would invalidate the cache for the next command execution. This can be scoped to subproject or configuration:

$ sbt foo/clean $ sbt foo/compile

This was contributed by @eed3si9n in #9752

Source dependency update

sbt 2.1.0 provides better control to handle source dependencies.

This was contributed by @seroperson in #8880.

Identity map optimization

In sbt 2.1.0, a key assignment (:=) whose right-hand side is expr.value short-circuits to x.set(expr).

This is helpful in avoiding JsonFormat[A] when expr is an uncached task.

This was contributed by @eed3si9n in #9831

Task-level caching opt-out

// opt out of compilation cache Compile / compile / cacheStores := Nil Test / compile / cacheStores := Nil // opt out of test cache Test / test / cacheStores := Nil

This was contributed by @eed3si9n in #9874

🚀 Other updates

Adds project id to Zinc debug log by @Achieve3318 in #8750

feat: Support doc / skip := true by @fury0928 in #8824

feat: case-insensitive tab completion by @bitloi in #8827

dependencyTree: add --append for file output in multi-module builds by @oolokioo7 in #8878

feat: Eviction error for downgrade of Scala 3.x by @bitloi in #8912

feat: Add English aliases cross and switch for + / ++ by @jonathanchang31 in #9051

feat: BSP buildTarget/dependencyModules by @jsdevninja in #9085

feat: Forward test events to listeners as they are emitted by @claytonlin1110 in #9087

feat: Adds ModuleID#exclude that accepts a %% b by @seroperson in #8756

Specific error message for defining types in build.sbt by @xuwei-k in #9579

Use JDK's Unix domain socket for bootserver by @eed3si9n in #9427

feat: Adds Seq[Initialize[Task[T]]]#join extension method by @jozanek in #9347

feat: Adds LoggerContext.removeAppender for single appender removal by @stasimus in #9740

feat: Adds ProjectMatrix#configureRows and configurePlatforms methods by @kitbellew in #9765

Custom user agent by @eed3si9n in #9786

feat: Persistent worker for tests by @eed3si9n in #9678

remoteCacheRequestTimeout setting by @eed3si9n in #9829

Use JDK 17 UNIX domain socket by @eed3si9n in #9846

CrossVersion: make parser public by @kitbellew in #9864

feat: Support platform in sbt query by @eed3si9n in #9876

feat: HTTP Bazel cache support by @eed3si9n in #9880

🐛 Bug fixes

fix: Fixes duplicate compiler bridge JAR in ZincComponentManager by @since-2017-hub in #8800

fix: Fixes backtick-quote project IDs in classloader error messages by @fury0928 in #8830

fix: Fixes non-deterministic ScopeFilter ordering by @bitloi in #8861

fix: Fixes continuous build watcher not respecting the log level by @fury0928 in #8864

fix: Fixes UpdateReport losing classifier information by @fury0928 in #8874

fix: Fixes .sbtopts not handling -sbt-dir with spaces by @Eruis2579 in #8875

fix: Fixes crash when .sbtopts has errors by @oolokioo7 in #8883

fix: Fixes sbt new scala/toolkit.local support by @mohamed0803 in #8887

fix: Fixes TaskConvert.appExpr by @xuwei-k in #8899

fix: Fixes script mode using Scala 3.x by @bitloi in #8900

fix: Fixes set every command with configuration scoping by @bittoby in #8916

fix: Fixes scripted test loading build definition twice on first test in batch by @bittoby in #8946

fix: Fixes misleading error message when .evaluated is used outside macro context by @BrianHotopp in #8951

fix: Fixes libraryDependencySchemes on cross-platform dependencies by @ckstck in #8957

fix: Fixes matrix base directory resolution for source dependencies by @bittoby in #8983

fix: Fixes unsorted progress indicator by @bittoby in #8984

fix: Fixes scritped test cleanup deleting symlinked directories by @fury0928 in #8985

fix: Fixes old shell syntax warning by @xuwei-k in #8998

fix: Fixes -sbt-dir / sbt.global.base not resolving relative paths by @BrianHotopp in #9001

fix: Fixes sbt server not returning a JSON-RPC error for unknown methods by @BrianHotopp in #9002

fix: Fixes failed curl leaving in the runner script corrupt JARs by @BrianHotopp in #9003

fix: Fixes derivedProjects not invoked when no explicit root project is defined by @bitcompass in #9012

fix: Fixes sbt.Tests.Group#hashCode by @xuwei-k in #9065

fix: Removes unused src/main/resources/log4j2.xml by @xuwei-k in #9071

fix: Fixes consoleProject for Scala 3 by @fury0928 in #9073

fix: Fixes Ctrl-c handling by @eed3si9n in #9130

fix: Fixes dependencyTree browse crashes on Linux by @jimcody1995 in #9147

fix: Fixes cache restoration of incremental compilation state (Analysis) by @eed3si9n in #9207

fix: Fixes dependencyTree rendering duplicate subtree by @BrianHotopp in #9226

fix: Fixes explicit equals and hashCode in LabeledFunctions by @xuwei-k in #9228

fix: Fixes sbtn throwing on exit by @eed3si9n in #9239

fix: Fixes sbt server refusing to start by @BrianHotopp in #9337

fix: Fixes resolver pattern resolution of [organisation] by @jozanek in #9344

fix: Fixes bgStop job id parser by @merlinorg in #9353

fix: Fixes multiple main classes warning showing up during tests by @merlinorg in #9372

fix: Fixes auto import of givens by @xuwei-k in #9409

fix: Fixes Windows runner not honoring -java-home by @jozanek in #9434

fix: Fixes dependency parsing for BSP by @anatoliykmetyuk in #9450

fix: Fixes gRPC channels recreated on reload by @eed3si9n in #9502

fix: Fixes sbtn stdin race condition by @eed3si9n in #9521

fix: Fixes sbt server freezing when a terminal-properties response is malformed or slow by @BrianHotopp in #9526 / #9527

fix: Fixes unbound client boot waiting by @BrianHotopp in #9549

fix: Fixes Java artifacts not getting exposed during a pipelined build by @anatoliykmetyuk in #9574

fix: Fixes build.sbt compilation errors not forwarded to the logger by @eed3si9n in #9599

fix: Fixes cache invalidation on version change by @eed3si9n in #9471 / #9820

fix: Fixes sbtn's handling on corrupt active.json by @eed3si9n in #9617

fix: Fixes cache inputs not using the full-width sha256 by @stasimus in #9641

fix: Fixes remote cache not verifying blobs by @stasimus in #9643

fix: Fixes sbt-native-packager compatibility by @xuwei-k in #9677

fix: Fixes Windows runner setting -Dsbt.global.base setting by @vlovgr in #9688

fix: Fixes sbt server making the port file avaiable partially by @kitbellew in #9689

fix: Fixes unhermetic semanticdbTargetRoot in the compile cache key by @christianharrington in #9711

fix: Fixes pipelined build of subprojects with macros by @stasimus in #9719

fix: Fixes -D options change by restarting the server by @stasimus in #9685

fix: Fixes sbt server getting stuck when a client fails by @kitbellew in #9691

fix: Fixes matrix support for a customRow with an empty scalaVersions by @kitbellew in #9717

fix: Fixes handling of bad resource generators by @eed3si9n in #9735

fix: Fixes cross command parsing by @stasimus in #9726

fix: Fixes displaced server keeps running by @kitbellew in #9713

fix: Fixes runAggregated falling back to Zero subproject scope by @jozanek in #9722

fix: Fixes diagnostics for task-local dependency references by @jozanek in #9728

fix: Include compileOrder and pipelining in the compile cache key by @stasimus in #9749

fix: Fixes sbt runner script not starting on openSUSE by @alexasl in #9753

fix: Fixes test setup/cleanup interleaving by @eed3si9n in #9727

fix: Let one client at a time restart the server by @stasimus in #9708

fix: Fixes Windows runner handling of sbt bsp by @stasimus in #9766

fix: Do not duplicate platform axes on a row by @kitbellew in #9757

fix: Warn on output declarations in uncached tasks by @anatoliykmetyuk in #9770

fix: Update to Gigahorse 0.9.6 for pre-authentication by @eed3si9n in #9775

fix: Name taskValue in its compile-time diagnostic by @anatoliykmetyuk in #9779

fix: ProjectMatrix: validate axes against autoScalaLibrary by @kitbellew in #9771

fix: Read the token again when it is refused by @kitbellew in #9738

fix: Make sbtn's result line consistent with sbt --server by @hoangmaihuy in #9783

fix: Hash the boot classpath in sorted order by @hoangmaihuy in #9809

fix: Restore the pipelining early output on an action-cache hit by @PhoenixmitX in #9793

fix: Fixes inMemoryAnalysisCache limit by @eed3si9n in #9500

fix: Read scripted pause from standard input by @anatoliykmetyuk in #9824

fix: Honor JAVA_HOME in the runner script by @anatoliykmetyuk in #9825

fix: Isolate cached test results by execution scope by @anatoliykmetyuk in #9823

fix: Fixes .m2/settings.xml overriding sbtResolvers by @eed3si9n in #9828

fix: Fixes -J options not forwarded to sbt server by @mkurz in #9839

fix: Fixes analysis cache not retaining recent Analysis by @eed3si9n in #9851

fix: Fixes CAS corruption by removing write permission from CAS by @eed3si9n in #9847

fix: Keep the interrupt flag when writing to the thin client by @pierscin in #9848

fix: Keep the interrupt flag in more thin-client paths by @eed3si9n in #9855

fix: Fixes watch ignoring file events by @eed3si9n in #9856

fix: Fixes one-line catch cases broken by the reformat by @eed3si9n in #9857

fix: Use Path.userHome by @eed3si9n in #9866

fix: Read all forked test output before reporting the fork's exit by @eugkhp in #9860

fix: Fixes task output lost by the thin client under CPU load by @eed3si9n in #9868

fix: Fixes handling of restored outputs whose cache blob is gone by @PhoenixmitX in #9870

fix: Drop credentials from cached URLs in dependencyLock by @seveneves in #9873

fix: Skip directory packaging when caching is off by @eed3si9n in #9875

fix: Fixes AccessDeniedException writing SemanticDB by @eed3si9n in #9878

⚡ Performance improvements

perf: lightweight UpdateReport cache persistence by @bitloi in #8815

perf: Cache AutoPlugin projectSettings/projectConfigurations by @volcano303 in #9077

perf: Resolve dependencies in parallel under the super shell by @BrianHotopp in #9295

Optimize InterfaceUtil by @xuwei-k in #9223

perf: Intern UpdateReport values by @hoangmaihuy in #9523

perf: Keep the Analysis cached across an action cache output sync by @hoangmaihuy in #9550

perf: Skip extracting a dirzip whose digest already matches by @hoangmaihuy in #9555

perf: Optimize UpdateReport disk format by @hoangmaihuy in #9515

perf: Skip re-packaging the class directory when zinc recompiles nothing by @hoangmaihuy in #9609

perf: Copy instead of symlink when restoring the disk cache on APFS by @hoangmaihuy in #9623

perf: Avoid re-sorting watch inputs on every file event by @stasimus in #9650

perf: Write packageBin JARs and action cache zips in parallel by @hoangmaihuy in #9661

perf: Cut redundant hashing in disk action cache by @stasimus in #9649

perf: Populate the in-memory cache on a read by @hoangmaihuy in #9657

perf: Avoid allocating pre/post-condition thunks in Execute by @retronym in #9885

Behind the scenes

deps: sjson-new 0.15.0 + Contraband 0.9.0 by @eed3si9n in #9282

deps: Gigahorse 0.9.4 by @eed3si9n in #9125

deps: Zinc 2.0.3 by @eed3si9n in #9498

test: Enable previously-disabled scripted and cross-build tests by @xuwei-k in #8932, #8933, #8934, #8935, #8936, #8937, #8943, #8944, #8947, #9038, #9191, #9192, #9199, #9387

test: Add Git Bash test on Windows by @eed3si9n in #8779

refactor: Extract color-default logic as a pure function by @fury0928 in #8817

refactor: Remove Ivy from update path and decouple lm-coursier from lm-ivy by @fury0928 in #8832

ci: Update launcher-package rpmUrl by @xuwei-k in #8833

docs: Fix typo in contributor guide by @it-education-md in #8834, #8835, #8837

Avoid private[this] in test build files by @xuwei-k in #8839

test: Enable DagSpecification.scala by @xuwei-k in #8840

refactor: Remove unnecessary/dead code across build files by @xuwei-k in #8843, #9045, #9070, #9154, #9174, #9480, #9589, #9026

test: Use new wildcard syntax in test build files by @xuwei-k in #8844

Use given instead of implicit val by @xuwei-k in #8870

refactor: Extract lm-ivy to separate sbt-ivy plugin module by @fury0928 in #8873

Improve -help/--help and fix launcher test harness by @Eruis2579 in #8879

Update TemplateCommandUtil.scala by @xuwei-k in #8884

ci: Update Java file formatter plugin by @xuwei-k in #8892

refactor: Delete @silent annotation by @xuwei-k in #8893

refactor: Modernize to newer Scala/JDK idioms (InputStream.transferTo, IO.withTemporaryDirectory, Files.writeString/readString, Arrays.copyOf, exists, OptionConverters, Using.resource) by @xuwei-k in #8896, #9212, #9084, #9093, #9111, #9200, #9211, #9213, #9230

Delete checkPluginCross task. Add sourceGenerators for PluginCross by @xuwei-k in #8897

ci: Format launcher-package/build.sbt by @xuwei-k in #8898

test: Add regression test coverage across the build (nested test quick, classloader layering, javaagent, move-file, definedTestNames, action cache traversal, and more) by @xuwei-k, @eed3si9n, and @stasimus in #8901, #9163, #9164, #9197, #9210, #9264, #9544, #9552, #9608, #9640

test: server-test and related refactoring by @seroperson in #8904

Simplify -Werror application by @eed3si9n in #8906

Add VF keys by @eed3si9n in #8915

ci: Add Scalafix DisableSyntax.noReturns by @xuwei-k in #8922

deps: launcher 1.6.1 by @corevibe555 in #8923

refactor: Remove unnecessary return statements by @xuwei-k in #8925, #8938, #8939, #8940, #9066

refactor: Remove unnecessary unchecked annotation by @xuwei-k in #8926

Update Parser.~.unapply by @xuwei-k in #8927

refactor: Update EscHelpers.scala by @xuwei-k in #8928

refactor: Use new Array instead of Array.fill by @xuwei-k in #8929

refactor: Avoid deprecated URL constructor by @xuwei-k in #8930

test: Delete sbt-test/lm-coursier/neo-sbt-scalafmt by @xuwei-k in #8931

test: Use IO.withTemporaryDirectory in UpdateReportPersistenceSpec by @xuwei-k in #8941

test: Delete sbt-test/project/continuations by @xuwei-k in #8948

Add scalafmt newlines.topLevelStatementBlankLines setting by @xuwei-k in #8949

Replace defunct link by @Philippus in #8950

ci: Bump GitHub Actions dependencies by @dependabot in #8965, #9366, #9476, #9513, #9695

test: Fixes Resolvers test formatting by @anatoliykmetyuk in #8968

refactor: Update ErrorMessageAuthenticator. Remove unnecessary reflection by @xuwei-k in #8976

test: Update ZincComponentCompilerSpec by @xuwei-k in #8979

docs: Fixes ++ help text by @BrianHotopp in #8995

refactor: Fix compiler warnings across the build by @xuwei-k in #8999, #9061, #9062, #9188, #9494, #9597

Add parentheses by @xuwei-k in #9000

ci: Organize ScalaTest dependency by @xuwei-k in #9015

ci: Update sbt-native-image plugin by @xuwei-k in #9016

Update sbt version in launcher-package test by @xuwei-k in #9021

refactor: Remove unnecessary reflection in IvyXml by @xuwei-k in #9024

refactor: Remove unnecessary language.experimental.macros import by @xuwei-k in #9025

Clear compiler bridge Zinc cache on reboot dev by @bitloi in #9057

refactor: Format pom.xml by @xuwei-k in #9059

ci: Add -source-links option by @xuwei-k in #9063

refactor: Remove whitesource from LintUnused by @xuwei-k in #9064

ci: Remove -Ymacro-expand option by @xuwei-k in #9072

Update .gitattributes for Contraband files by @xuwei-k in #9076

ci: Update sbt-java-formatter by @mkurz in #9098

Remove duplicate build settings (TestFramework, packageSrc/mappings, scalaVersion) by @xuwei-k in #9112, #9156, #9297

ci: Update sbt and sbt-scalafmt plugin by @xuwei-k in #9148

ci: Avoid legacy/deprecated Scala syntax (postfix, infix, replaceAllLiterally) in build files by @xuwei-k in #9150, #9157, #9175, #9173

ci: Filter NOTICE file by @xuwei-k in #9155

Remove -source:3.7 option by @xuwei-k in #9176

Improve --help by @eed3si9n in #9180

deps: Coursier 2.1.25-M25 by @eed3si9n in #9232

ci: Build sbt/sbt using sbt 2 by @xuwei-k in #9244

refactor: Format launcherPackageIntegrationTest by @xuwei-k in #9245

Improve deprecation UX for watchSources by @anatoliykmetyuk in #9247

refactor: Avoid dollars in name by @xuwei-k in #9313

Remove type ascription in Continuous by @xuwei-k in #9314

ci: Update version and ivy tests by @xuwei-k in #9342

test: Update sbt.version in launcher-package/citest2 by @xuwei-k in #9357

deps: sbtn 2.0.0-2932685e by @eed3si9n in #9363

ci: Modify bug report template for custom labels by @eed3si9n in #9384

Update versions in TemplateCommandUtil by @xuwei-k in #9388

ci: Add devcontainer by @eed3si9n in #9392

ci: Add issue reproduction skill by @anatoliykmetyuk in #9400

refactor: Refactor LibraryManagement.scala by @xuwei-k in #9405

Mark log-related keys transient by @eed3si9n in #9407

deps: ipcsocket 1.8.0 by @eed3si9n in #9433

Add native client startup diagnostics regression test by @anatoliykmetyuk in #9447

refactor: Avoid deprecated url(...) method in test by @xuwei-k in #9453

Bump version number by @eed3si9n in #9470

ci: Use --server by @eed3si9n in #9483

ci: Update project/plugins.sbt by @xuwei-k in #9491

ci: Fix publishLocalBin by @eed3si9n in #9505

ci: Update mima setting by @xuwei-k in #9511

ci: Use sbt 2.0.4 by @eed3si9n in #9512

refactor: Remove unnecessary match by @xuwei-k in #9539

ci: Remove cla-checker v1 by @eed3si9n in #9570

Update Eval.compileAndLoad by @xuwei-k in #9583

docs: Fix HashAlgo scaladoc by @xuwei-k in #9590

refactor: Add @tailrec annotation by @xuwei-k in #9591

refactor: Remove redundant String.toString by @xuwei-k in #9592

refactor: Remove nowarn annotation in CoursierDependencyResolution by @xuwei-k in #9593

ci: Update sbt and plugins by @xuwei-k in #9603

test: Community Build by @eed3si9n in #9659

test: Fix MatchError in RunFromSourceMain if RC version by @xuwei-k in #9684

ci: Update CLA url by @xuwei-k in #9686

test: Keep every output line the runner test reads by @stasimus in #9687

refactor: Retry a read before discarding a server by @kitbellew in #9690

refactor: Share a holder for a closeable by @kitbellew in #9692

ci: Update dependabot.yml target-branch by @xuwei-k in #9697

ci: Fix nightly publishing by @eed3si9n in #9705

refactor: Name the expressions that repeat by @kitbellew in #9712

ci: Removes Ivy API usage from build publishing plugins by @anatoliykmetyuk in #9723

Update IO to 1.13.2 by @eed3si9n in #9731

Update Zinc to 2.1.0-M2 by @eed3si9n in #9733

doc: Update the style guide by @eed3si9n in #9736

refactor: Update scalafmt.conf by @eed3si9n in #9737

build: Upgrade MiMa to 1.2.0 by @kitbellew in #9750

Update sbtn to 2.1.0-M1 by @eed3si9n in #9755

Use sbt 2.1.0-M1 by @eed3si9n in #9767

ci: Update mima setting by @xuwei-k in #9760

ci: Fix warnings by @xuwei-k in #9768

Update ModuleIDExtra.exclude deprecated annotation by @xuwei-k in #9758

deps: Update scala-xml and scala-parser-combinators by @xuwei-k in #9777

Remove dataclass-annotation dependency by @xuwei-k in #9776

ci: Use sbt scalafmtRepo, exclude some dirs by @kitbellew in #9785

deps: Coursier 2.1.25 by @eed3si9n in #9784

test: Fix transient key warnings in scripted tests by @xuwei-k in #9795

deps: Launcher 1.7.0 by @eed3si9n in #9798

Remove disruptor dependency by @xuwei-k in #9797

deps: Update Caffeine by @xuwei-k in #9796

deps: Zinc 2.1.0-M3, Gigahorse 0.9.7 by @eed3si9n in 021f40d35

refactor: Avoid default parameter by @eed3si9n in e7018fe64

Update Zinc to 2.1.0-M4 by @eed3si9n in #9802

Update sbtn to 2.1.0-M2 by @eed3si9n in #9801

docs: Update Contributor's guide by @eed3si9n in #9807

refactor: CrossVersionExtra: extra cross-version parser by @kitbellew in #9790

refactor: ProjectMatrix: re-use xxxPlatform methods by @kitbellew in #9788

refactor: VirtualAxis: refactor constructing ScalaVersionAxis by @kitbellew in #9789

Update user-agent to major.minor by @eed3si9n in #9818

ci: Include other repos into devcontainer by @eed3si9n in #9819

Use sbt 2.1.0-M2 by @xuwei-k in #9833

test: Fix warning in test by @xuwei-k in #9832

test: Add chimney to community-build by @eed3si9n in #9836

deps: Zinc 2.1.0-M5 by @eed3si9n in #9837

Retry mkInput by @eed3si9n in #9835

deps: Update Coursier to 2.1.26 by @eed3si9n in #9852

deps: sbtn 2.1.0-6eac8efa by @eed3si9n in #9861

Replace old sun.misc.Unsafe lazy val in lmCoursierShaded by @xuwei-k in #9853

ci: Rebalance scripted jobs by @eed3si9n in #9867

test: Add sttp to community build by @eed3si9n in #9881

ci: Update mima setting by @xuwei-k in #9882

ci: Update sbt and plugins by @xuwei-k in #9883

ci: Suppress warning in launcher-package/build.sbt by @xuwei-k in #9884

deps: Zinc 2.1.0-M6 by @eed3si9n in #9886

Full Changelog: v2.0.10...v2.1.0-RC1
Original source
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Oct 2, 2026
Date parsed from source:
Oct 2, 2026

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Oct 13, 2026
sbt

2.0.10

sbt releases an update that makes its runner honor JAVA_HOME, refreshes Coursier and other dependencies, and fixes cache corruption, symlink handling, pipelined output, and scripted pauses.
Changes with compatibility implications

sbt runner script honors JAVA_HOME environment variable by @anatoliykmetyuk in #9825

🚀 updates

deps: Updates to Coursier 2.1.26, and sets user agent header by @eed3si9n in #9784, #9852, #9786 and #9818

🐛 bug fixes

fix: Removes write permission from the CAS to prevent cache corruption by @eed3si9n in #9847

fix: Implements copy-on-write for symlinks by @eed3si9n in sbt/io#568

fix: Restores the pipelining early output on an action-cache hit by @PhoenixmitX in #9793

fix: Reads scripted pause from standard input by @anatoliykmetyuk in #9824

fix: Keeps the interrupt flag when writing to the thin client by @pierscin and @eed3si9n in #9848 / #9855

Behind the scenes

deps: Updates to Gigahorse 0.9.6 by @eed3si9n in #9775

deps: IO 1.13.4 by @eed3si9n in #9847

deps: sbtn 2.1.0-6eac8efa by @eed3si9n in #9861

Full Changelog: v2.0.9...v2.0.10
Original source
Sep 28, 2026
Date parsed from source:
Sep 28, 2026

First seen by Releasebot:
Oct 13, 2026
sbt

2.1.0-M3

sbt releases 2.1.0-M3 with fixes for publishing, caching, and Scala 3 pipelining, plus persistent test workers. The update also improves artifact metadata and build execution reliability.
Updates and bug fixes

fix: Restore cross-suffixed artifactIds in sbt 1 plugin POMs by @mkurz in #9804

fix: Restore sbt 1 plugin POM metadata by @mkurz in #9806

fix: Hash the boot classpath in sorted order by @hoangmaihuy in #9809

fix: Derive Maven paths from module and artifact names by @mkurz in #9811

fix: Restore the pipelining early output on an action-cache hit by @PhoenixmitX in #9793

fix: publishLocal must overwrite, remote publish must not by @jozanek in #9814

fix: Remove duplicate self JAR from Runtime by @eed3si9n in #9820

fix: Fixes inMemoryAnalysisCache limit by @eed3si9n in #9500

feat: Persistent worker for tests by @eed3si9n in #9678

fix: Read scripted pause from standard input by @anatoliykmetyuk in #9824

fix: Honor JAVA_HOME in the runner script by @anatoliykmetyuk in #9825

fix: Isolate cached test results by execution scope by @anatoliykmetyuk in #9823

fix: Fixes .m2/settings.xml overriding sbtResolvers by @eed3si9n in #9828

remoteCacheRequestTimeout setting by @eed3si9n in #9829

Short-circuit x := expr.value by @eed3si9n in #9831

fix: Fixes pipelining on Scala 3 by @lrytz in sbt/zinc#1817

fix: Reject JavaThenScala when pipelining by @stasimus in sbt/zinc#1789

Don't recompile dependents of unchanged Java sources when pipelining by @lrytz in sbt/zinc#1821

With pipelining, wait for Scala 3 to send dependencies by @lrytz in sbt/zinc#1822

Pipelining: announce no early output when Scala 3 skips dependencyPhaseCompleted by @lrytz in sbt/zinc#1823

Behind the scenes

Update Contributor's guide by @eed3si9n in #9807

refactor: CrossVersionExtra: extra cross-version parser by @kitbellew in #9790

refactor: ProjectMatrix: re-use xxxPlatform methods by @kitbellew in #9788

refactor: VirtualAxis: refactor constructing ScalaVersionAxis by @kitbellew in #9789

Update user-agent to major.minor by @eed3si9n in #9818

Include other repos into devcontainer by @eed3si9n in #9819

Use sbt 2.1.0-M2 by @xuwei-k in #9833

test: Fix warning in test by @xuwei-k in #9832

fix: Retry mkInput by @eed3si9n in #9835

test: Add chimney to community-build by @eed3si9n in #9836

deps: Zinc 2.1.0-M5 by @eed3si9n in #9837

New Contributors

@PhoenixmitX made their first contribution in #9793

Full Changelog: v2.1.0-M2...v2.1.0-M3
Original source
Sep 23, 2026
Date parsed from source:
Sep 23, 2026

First seen by Releasebot:
Oct 13, 2026
sbt

2.1.0-M2

sbt releases 2.1.0-M2 with fixes for Windows BSP handling, project matrix axes, task diagnostics, and remote Maven snapshots, plus updates to Coursier, Zinc, the launcher, and sbtn. The update also improves row configuration and authentication handling.
updates and bug fixes

fix: Fixes Windows runner handling of sbt bsp by @stasimus in #9766

fix: Do not duplicate platform axes on a row by @kitbellew in #9757

fix: Warn on output declarations in uncached tasks by @anatoliykmetyuk in #9770

Allow adding rows and configuring them separately, and through any method by @kitbellew in #9765

fix: Update to Gigahorse 0.9.6 for pre-authentication by @eed3si9n in #9775

fix: Name taskValue in its compile-time diagnostic by @anatoliykmetyuk in #9779

ProjectMatrix: validate axes against autoScalaLibrary by @kitbellew in #9771

deps: Coursier 2.1.25 by @eed3si9n in #9784

fix: Read the token again when it is refused by @kitbellew in #9738

Custom user agent by @eed3si9n in #9786

fix: Make sbtn's result line consistent with sbt --server by @hoangmaihuy in #9783

Deploy remote Maven snapshots with one timestamp by @stasimus in #9756

lazy val / sun.misc.Unsafe migration

Update scala-xml and scala-parser-combinators by @xuwei-k in #9777

deps: Launcher 1.7.0 by @eed3si9n in #9798

Remove disruptor dependency by @xuwei-k in #9797

Update caffeine by @xuwei-k in #9796

behind the scenes

Use sbt 2.1.0-M1 by @eed3si9n in #9767

ci: Update mima setting by @xuwei-k in #9760

ci: Fix warnings by @xuwei-k in #9768

Update ModuleIDExtra.exclude deprecated annotation by @xuwei-k in #9758

Remove dataclass-annotation dependency by @xuwei-k in #9776

ci: Use sbt scalafmtRepo, exclude some dirs by @kitbellew in #9785

test: Fix transient key warnings in scripted tests by @xuwei-k in #9795

Revert to Zinc 2.1.0-M2 by @eed3si9n in #9800

Update Zinc to 2.1.0-M4 by @eed3si9n in #9802

Update sbtn to 2.1.0-M2 by @eed3si9n in #9801

Full Changelog: v2.1.0-M1...v2.1.0-M2
Original source
Similar to sbt with recent updates:
Sep 14, 2026
Date parsed from source:
Sep 14, 2026

First seen by Releasebot:
Oct 13, 2026
sbt

2.0.9

sbt 2.0.9 fixes Windows JAR access, compile-cache and pipelining issues, and improves runner compatibility while updating sbtn.
🐛 bug fixes

fix: Fixes AccessDeniedException on Windows by creating JAR in situ by @eed3si9n in sbt/io#558

fix: Fixes unhermetic semanticdbTargetRoot in the compile cache key by @christianharrington in #9711

fix: Fixes pipelined build with Java sources by @anatoliykmetyuk in #9574

fix: Keep macro subprojects off the pipelined classpath by @stasimus in #9719

fix: Fixes sbt runner script not starting on openSUSE by @alexasl in #9753

Update to sbtn 2.1.0-M1 #9755

Full Changelog: v2.0.8...v2.0.9

Original source
Sep 14, 2026
Date parsed from source:
Sep 14, 2026

First seen by Releasebot:
Oct 13, 2026
sbt

2.1.0-M1

sbt releases version 2.1.0 with Scala 3.9 metabuild support, Ivy-free publishing, smarter build and test caching, improved test summaries and scheduling, and broad performance gains and bug fixes. Note that plugins built for sbt 2.1.x are not compatible with sbt 2.0.x.
Changes with compatibility implications

Metabuild is updated to Scala 3.9.

Apache Ivy is removed from the dependency.

Scala 3.9 on metabuild

sbt 2.1.0 updates the Scala version used by the metabuild to Scala 3.9.0.

Since both sbt 2.x and Scala 3.x are only backward compatible across minor versions, appropriate Scala version must be used for building sbt plugins. Also a plugin built using sbt 2.1.x will not work on sbt 2.0.x:
sbt 2.x Scala 3.x Plugin works on sbt 2.0.x 2.0.x 3.8.x ✅ 2.1.0 3.9.x ❌
Plugin authors: Here's how to set the minimal sbt version for your plugin:

pluginCrossBuild / sbtVersion := { scalaBinaryVersion.value match { case "2.12" => "1.9.9" case _ => "2.0.8" } }

Publishing

sbt 2.1.0 removes Apache Ivy from its transitive dependency, and implements Ivyless publishing.

This was contributed by @bitloi, @fury0928, @BrianHotopp, and @eed3si9n in #8686, #8866, #8894, #8975, #8988, #8996, #9069, #9463, and #9533, #9615 etc.

clean task

To restore the semantics of clean in the presence of disk cache, sbt 2.1.0 updates the clean task to act as a cache invalidator. Regardless of the cache state, running clean would invalidate the cache for the next command execution. This can be scoped to subproject or configuration:

$ sbt foo/clean $ sbt foo/compile

This was contributed by @eed3si9n in #9752

Test summary

When tests are executed, sbt 2.1.0 displays a test summary at the end, listing the failed test suites as follows:

[error] Test summary (2 test tasks failed): [error] a / Test / testQuick [error] com.example.a.TestA FAIL [error] b / Test / testQuick [error] com.example.b.TestB FAIL [error] [error] failed: total 4, failed 2, errors 0, passed 2, cached 2

Successful tests will display only a terse summary by default:

[info] passed: total 4, failed 0, errors 0, passed 4, cached 4

--test_summary=success can override the behavior to list the successful test as well. Test summary was contributed by @eed3si9n and @BrianHotopp in #9602 + #9214.

Test cache opt-out

sbt 2.1.0 can let you opt out of test result caching:

$ sbt test --cache_test_result=false

This was contributed by @anatoliykmetyuk in #9675.

workerMaxInstances and testTopology

sbt 2.1.0 adds new settings workerMaxInstances and testTopology to control test scheduling, especially of the forked tests. Use Global / workerMaxInstances to change the number of worker instances. The default is set to 2:

// or sbt -Dsbt.worker_max_instances=2 Global / workerMaxInstances := 2

Use the testTopology setting to control whether you want to split the test classes into multiple workers or keep them together. The default was changed to split to 2 groups:

Test / testTopology := TestTopology.subprojectSplit(2)

To keep all classes in a subproject on one worker instead, use:

Test / testTopology := TestTopology.subprojectExclusive

This was contributed by @eed3si9n in #9665

Source dependency update

sbt 2.1.0 provides better control to handle source dependencies.

This was contributed by @seroperson in #8880.

⚡ Performance improvements

perf: lightweight UpdateReport cache persistence by @bitloi in #8815

perf: Cache AutoPlugin projectSettings/projectConfigurations by @volcano303 in #9077

perf: Resolve dependencies in parallel under the super shell by @BrianHotopp in #9295

Optimize InterfaceUtil by @xuwei-k in #9223

perf: Intern UpdateReport values by @hoangmaihuy in #9523

perf: Keep the Analysis cached across an action cache output sync by @hoangmaihuy in #9550

perf: Skip extracting a dirzip whose digest already matches by @hoangmaihuy in #9555

perf: Optimize UpdateReport disk format by @hoangmaihuy in #9515

perf: Skip re-packaging the class directory when zinc recompiles nothing by @hoangmaihuy in #9609

perf: Copy instead of symlink when restoring the disk cache on APFS by @hoangmaihuy in #9623

perf: Avoid re-sorting watch inputs on every file event by @stasimus in #9650

perf: Write packageBin JARs and action cache zips in parallel by @hoangmaihuy in #9661

perf: Cut redundant hashing in disk action cache by @stasimus in #9649

perf: Populate the in-memory cache on a read by @hoangmaihuy in #9657

🚀 Other updates

Adds project id to Zinc debug log by @Achieve3318 in #8750

feat: Support doc / skip := true by @fury0928 in #8824

feat: case-insensitive tab completion by @bitloi in #8827

dependencyTree: add --append for file output in multi-module builds by @oolokioo7 in #8878

feat: Eviction error for downgrade of Scala 3.x by @bitloi in #8912

feat: Add English aliases cross and switch for + / ++ by @jonathanchang31 in #9051

feat: BSP buildTarget/dependencyModules by @jsdevninja in #9085

feat: Forward test events to listeners as they are emitted by @claytonlin1110 in #9087

feat: Adds ModuleID#exclude that accepts a %% b by @seroperson in #8756

Specific error message for defining types in build.sbt by @xuwei-k in #9579

Use JDK's Unix domain socket for bootserver by @eed3si9n in #9427

feat: Adds Seq[Initialize[Task[T]]]#join extension method by @jozanek in #9347

feat: Adds LoggerContext.removeAppender for single appender removal by @stasimus in #9740

feat: Improve Zinc invalidation debug logs by @jozanek in sbt/zinc#1765

🐛 Bug fixes

fix: Fixes non-deterministic ScopeFilter ordering by @bitloi in #8861

fix: Fixes unhermetic semanticdbTargetRoot in the compile cache key by @christianharrington in #9711

fix: Fixes duplicate compiler bridge JAR in ZincComponentManager by @since-2017-hub in #8800

fix: Fixes backtick-quote project IDs in classloader error messages by @fury0928 in #8830

fix: Fixes continuous build watcher not respecting the log level by @fury0928 in #8864

fix: Fixes UpdateReport losing classifier information by @fury0928 in #8874

fix: Fixes .sbtopts not handling -sbt-dir with spaces by @Eruis2579 in #8875

fix: Fixes crash when .sbtopts has errors by @oolokioo7 in #8883

fix: Fixes sbt new scala/toolkit.local support by @mohamed0803 in #8887

fix: Fixes TaskConvert.appExpr by @xuwei-k in #8899

fix: Fixes script mode using Scala 3.x by @bitloi in #8900

fix: Fixes set every command with configuration scoping by @bittoby in #8916

fix: Fixes scripted test loading build definition twice on first test in batch by @bittoby in #8946

fix: Fixes misleading error message when .evaluated is used outside macro context by @BrianHotopp in #8951

fix: Fixes libraryDependencySchemes on cross-platform dependencies by @ckstck in #8957

fix: Fixes matrix base directory resolution for source dependencies by @bittoby in #8983

fix: Fixes unsorted progress indicator by @bittoby in #8984

fix: Fixes scritped test cleanup deleting symlinked directories by @fury0928 in #8985

fix: Fixes old shell syntax warning by @xuwei-k in #8998

fix: Fixes -sbt-dir / sbt.global.base not resolving relative paths by @BrianHotopp in #9001

fix: Fixes sbt server not returning a JSON-RPC error for unknown methods by @BrianHotopp in #9002

fix: Fixes failed curl leaving in the runner script corrupt JARs by @BrianHotopp in #9003

fix: Fixes derivedProjects not invoked when no explicit root project is defined by @bitcompass in #9012

fix: Fixes sbt.Tests.Group#hashCode by @xuwei-k in #9065

fix: Removes unused src/main/resources/log4j2.xml by @xuwei-k in #9071

fix: Fixes consoleProject for Scala 3 by @fury0928 in #9073

fix: Fixes Ctrl-c handling by @eed3si9n in #9130

fix: Fixes dependencyTree browse crashes on Linux by @jimcody1995 in #9147

fix: Fixes cache restoration of incremental compilation state (Analysis) by @eed3si9n in #9207

fix: Fixes dependencyTree rendering duplicate subtree by @BrianHotopp in #9226

fix: Fixes explicit equals and hashCode in LabeledFunctions by @xuwei-k in #9228

fix: Fixes sbtn throwing on exit by @eed3si9n in #9239

fix: Fixes sbt server refusing to start by @BrianHotopp in #9337

fix: Fixes resolver pattern resolution of [organisation] by @jozanek in #9344

fix: Fixes bgStop job id parser by @merlinorg in #9353

fix: Fixes multiple main classes warning showing up during tests by @merlinorg in #9372

fix: Fixes auto import of givens by @xuwei-k in #9409

fix: Fixes Windows runner not honoring -java-home by @jozanek in #9434

fix: Fixes dependency parsing for BSP by @anatoliykmetyuk in #9450

fix: Fixes gRPC channels recreated on reload by @eed3si9n in #9502

fix: Fixes sbtn stdin race condition by @eed3si9n in #9521

fix: Fixes sbt server freezing when a terminal-properties response is malformed or slow by @BrianHotopp in #9526 / #9527

fix: Fixes unbound client boot waiting by @BrianHotopp in #9549

fix: Fixes Java artifacts not getting exposed during a pipelined build by @anatoliykmetyuk in #9574

fix: Fixes build.sbt compilation errors not forwarded to the logger by @eed3si9n in #9599

fix: Fixes cache invalidation on version change by @eed3si9n in #9471

fix: Fixes sbtn's handling on corrupt active.json by @eed3si9n in #9617

fix: Fixes cache inputs not using the full-width sha256 by @stasimus in #9641

fix: Fixes remote cache not verifying blobs by @stasimus in #9643

fix: Fixes sbt-native-packager compatibility by @xuwei-k in #9677

fix: Fixes Windows runner setting -Dsbt.global.base setting by @vlovgr in #9688

fix: Fixes sbt server making the port file available partially by @kitbellew in #9689

fix: Fixes pipelined build of subprojects with macros by @stasimus in #9719

fix: Fixes -D options change by restarting the server by @stasimus in #9685

fix: Fixes sbt server getting stuck when a client fails by @kitbellew in #9691

fix: Fixes matrix support for a customRow with an empty scalaVersions by @kitbellew in #9717

fix: Fixes handling of bad resource generators by @eed3si9n in #9735

fix: Fixes cross command parsing by @stasimus in #9726

fix: Fixes displaced server keeps running by @kitbellew in #9713

fix: Fixes runAggregated falling back to Zero subproject scope by @jozanek in #9722

fix: Fixes diagnostics for task-local dependency references by @jozanek in #9728

fix: Include compileOrder and pipelining in the compile cache key by @stasimus in #9749

fix: Fixes sbt runner script not starting on openSUSE by @alexasl in #9753

fix: Fixes test setup/cleanup interleaving by @eed3si9n in #9727

fix: Let one client at a time restart the server by @stasimus in #9708

fix: Prevent quadratic API node interning by @nguyenyou in sbt/zinc#1767

fix: Avoid adding a bootclasspath if it already exists by @jozanek in sbt/zinc#1766

Drop Java serialization from text analysis format by @stasimus in sbt/zinc#1769

Stabilize names of refinement-owned type parameters by @jozanek in sbt/zinc#1782

Treat a null associatedFile as absent on Scala 2.10 by @jozanek in sbt/zinc#1785

Behind the scenes

deps: sjson-new 0.15.0 + Contraband 0.9.0 by @eed3si9n in #9282

deps: Gigahorse 0.9.4 by @eed3si9n in #9125

deps: Zinc 2.0.3 by @eed3si9n in #9498

test: Enable previously-disabled scripted and cross-build tests by @xuwei-k in #8932, #8933, #8934, #8935, #8936, #8937, #8943, #8944, #8947, #9038, #9191, #9192, #9199, #9387

test: Add Git Bash test on Windows by @eed3si9n in #8779

refactor: Extract color-default logic as a pure function by @fury0928 in #8817

refactor: Remove Ivy from update path and decouple lm-coursier from lm-ivy by @fury0928 in #8832

ci: Update launcher-package rpmUrl by @xuwei-k in #8833

docs: Fix typo in contributor guide by @it-education-md in #8834, #8835, #8837

Avoid private[this] in test build files by @xuwei-k in #8839

test: Enable DagSpecification.scala by @xuwei-k in #8840

refactor: Remove unnecessary/dead code across build files by @xuwei-k in #8843, #9045, #9070, #9154, #9174, #9480, #9589, #9026

test: Use new wildcard syntax in test build files by @xuwei-k in #8844

Use given instead of implicit val by @xuwei-k in #8870

refactor: Extract lm-ivy to separate sbt-ivy plugin module by @fury0928 in #8873

Improve -help/--help and fix launcher test harness by @Eruis2579 in #8879

Update TemplateCommandUtil.scala by @xuwei-k in #8884

ci: Update Java file formatter plugin by @xuwei-k in #8892

refactor: Delete @silent annotation by @xuwei-k in #8893

refactor: Modernize to newer Scala/JDK idioms (InputStream.transferTo, IO.withTemporaryDirectory, Files.writeString/readString, Arrays.copyOf, exists, OptionConverters, Using.resource) by @xuwei-k in #8896, #9212, #9084, #9093, #9111, #9200, #9211, #9213, #9230

Delete checkPluginCross task. Add sourceGenerators for PluginCross by @xuwei-k in #8897

ci: Format launcher-package/build.sbt by @xuwei-k in #8898

test: Add regression test coverage across the build (nested test quick, classloader layering, javaagent, move-file, definedTestNames, action cache traversal, and more) by @xuwei-k, @eed3si9n, and @stasimus in #8901, #9163, #9164, #9197, #9210, #9264, #9544, #9552, #9608, #9640

test: server-test and related refactoring by @seroperson in #8904

Simplify -Werror application by @eed3si9n in #8906

Add VF keys by @eed3si9n in #8915

ci: Add Scalafix DisableSyntax.noReturns by @xuwei-k in #8922

deps: launcher 1.6.1 by @corevibe555 in #8923

refactor: Remove unnecessary return statements by @xuwei-k in #8925, #8938, #8939, #8940, #9066

refactor: Remove unnecessary unchecked annotation by @xuwei-k in #8926

Update Parser.~.unapply by @xuwei-k in #8927

refactor: Update EscHelpers.scala by @xuwei-k in #8928

refactor: Use new Array instead of Array.fill by @xuwei-k in #8929

refactor: Avoid deprecated URL constructor by @xuwei-k in #8930

test: Delete sbt-test/lm-coursier/neo-sbt-scalafmt by @xuwei-k in #8931

test: Use IO.withTemporaryDirectory in UpdateReportPersistenceSpec by @xuwei-k in #8941

test: Delete sbt-test/project/continuations by @xuwei-k in #8948

Add scalafmt newlines.topLevelStatementBlankLines setting by @xuwei-k in #8949

Replace defunct link by @Philippus in #8950

ci: Bump GitHub Actions dependencies by @dependabot in #8965, #9366, #9476, #9513, #9695

test: Fixes Resolvers test formatting by @anatoliykmetyuk in #8968

refactor: Update ErrorMessageAuthenticator. Remove unnecessary reflection by @xuwei-k in #8976

test: Update ZincComponentCompilerSpec by @xuwei-k in #8979

docs: Fixes ++ help text by @BrianHotopp in #8995

refactor: Fix compiler warnings across the build by @xuwei-k in #8999, #9061, #9062, #9188, #9494, #9597

Add parentheses by @xuwei-k in #9000

ci: Organize ScalaTest dependency by @xuwei-k in #9015

ci: Update sbt-native-image plugin by @xuwei-k in #9016

Update sbt version in launcher-package test by @xuwei-k in #9021

refactor: Remove unnecessary reflection in IvyXml by @xuwei-k in #9024

refactor: Remove unnecessary language.experimental.macros import by @xuwei-k in #9025

Clear compiler bridge Zinc cache on reboot dev by @bitloi in #9057

refactor: Format pom.xml by @xuwei-k in #9059

ci: Add -source-links option by @xuwei-k in #9063

refactor: Remove whitesource from LintUnused by @xuwei-k in #9064

ci: Remove -Ymacro-expand option by @xuwei-k in #9072

Update .gitattributes for Contraband files by @xuwei-k in #9076

ci: Update sbt-java-formatter by @mkurz in #9098

Remove duplicate build settings (TestFramework, packageSrc/mappings, scalaVersion) by @xuwei-k in #9112, #9156, #9297

ci: Update sbt and sbt-scalafmt plugin by @xuwei-k in #9148

ci: Avoid legacy/deprecated Scala syntax (postfix, infix, replaceAllLiterally) in build files by @xuwei-k in #9150, #9157, #9175, #9173

ci: Filter NOTICE file by @xuwei-k in #9155

Remove -source:3.7 option by @xuwei-k in #9176

Improve --help by @eed3si9n in #9180

deps: Coursier 2.1.25-M25 by @eed3si9n in #9232

ci: Build sbt/sbt using sbt 2 by @xuwei-k in #9244

refactor: Format launcherPackageIntegrationTest by @xuwei-k in #9245

Improve deprecation UX for watchSources by @anatoliykmetyuk in #9247

refactor: Avoid dollars in name by @xuwei-k in #9313

Remove type ascription in Continuous by @xuwei-k in #9314

ci: Update version and ivy tests by @xuwei-k in #9342

test: Update sbt.version in launcher-package/citest2 by @xuwei-k in #9357

deps: sbtn 2.0.0-2932685e by @eed3si9n in #9363

ci: Modify bug report template for custom labels by @eed3si9n in #9384

Update versions in TemplateCommandUtil by @xuwei-k in #9388

ci: Add devcontainer by @eed3si9n in #9392

ci: Add issue reproduction skill by @anatoliykmetyuk in #9400

refactor: Refactor LibraryManagement.scala by @xuwei-k in #9405

Mark log-related keys transient by @eed3si9n in #9407

deps: ipcsocket 1.8.0 by @eed3si9n in #9433

Add native client startup diagnostics regression test by @anatoliykmetyuk in #9447

refactor: Avoid deprecated url(...) method in test by @xuwei-k in #9453

Bump version number by @eed3si9n in #9470

ci: Use --server by @eed3si9n in #9483

ci: Update project/plugins.sbt by @xuwei-k in #9491

ci: Fix publishLocalBin by @eed3si9n in #9505

ci: Update mima setting by @xuwei-k in #9511

ci: Use sbt 2.0.4 by @eed3si9n in #9512

refactor: Remove unnecessary match by @xuwei-k in #9539

ci: Remove cla-checker v1 by @eed3si9n in #9570

Update Eval.compileAndLoad by @xuwei-k in #9583

docs: Fix HashAlgo scaladoc by @xuwei-k in #9590

refactor: Add @tailrec annotation by @xuwei-k in #9591

refactor: Remove redundant String.toString by @xuwei-k in #9592

refactor: Remove nowarn annotation in CoursierDependencyResolution by @xuwei-k in #9593

ci: Update sbt and plugins by @xuwei-k in #9603

test: Community Build by @eed3si9n in #9659

test: Fix MatchError in RunFromSourceMain if RC version by @xuwei-k in #9684

ci: Update CLA url by @xuwei-k in #9686

test: Keep every output line the runner test reads by @stasimus in #9687

refactor: Retry a read before discarding a server by @kitbellew in #9690

refactor: Share a holder for a closeable by @kitbellew in #9692

ci: Update dependabot.yml target-branch by @xuwei-k in #9697

ci: Fix nightly publishing by @eed3si9n in #9705

refactor: Name the expressions that repeat by @kitbellew in #9712

ci: Removes Ivy API usage from build publishing plugins by @anatoliykmetyuk in #9723

Update IO to 1.13.2 by @eed3si9n in #9731

Update Zinc to 2.1.0-M2 by @eed3si9n in #9733

doc: Update the style guide by @eed3si9n in #9736

refactor: Update scalafmt.conf by @eed3si9n in #9737

build: Upgrade MiMa to 1.2.0 by @kitbellew in #9750

Update sbtn to 2.1.0-M1 by @eed3si9n in #9755

Full Changelog: f976330...1414845
Original source
Aug 28, 2026
Date parsed from source:
Aug 28, 2026

First seen by Releasebot:
Oct 13, 2026
sbt

2.0.8

sbt 2.0.8 fixes test reporting, plugin file handling, JDK 17 socket deadlocks, Windows runner issues, and other bugs.
🐛 bug fixes

fix: Fixes ThisBuild-scoped bare settings by @eed3si9n in #9674

fix: Fixes TestReportListener not receiving endGroup after a LinkageError by @unkarjedy in #9667

fix: Fixes the ability to extend TestResultLogger by @unkarjedy in #9655

fix: Fixes --addPluginSbtFile getting lost after reboot by @azdrojowa123 in #9669

fix: Fixes JDK 17 domain socket deadlocks by @eed3si9n in #9671

fix: Keep adhoc test classloader open in a forked test @stasimus in #9639

fix: Fixes Windows runner by @eed3si9n in #9680

Full Changelog: v2.0.7...v2.0.8
Original source
Aug 21, 2026
Date parsed from source:
Aug 21, 2026

First seen by Releasebot:
Oct 13, 2026
sbt

2.0.7

sbt releases versions 1.13.0 and 2.0.7 with a fix for a remote code execution vulnerability affecting TCP server connections, plus improvements to compilation performance, caching, BSP, and other bug fixes.
⚠️ Remote code execution vulnerability fix

sbt team received a security report GHSA-943m-f264-54p4 from @stasimus that when the serverConnectionType is set to Tcp, an attacker is able to execute arbitrary code remotely via BSP, similar to a recent bug that was found in JSON-RPC. sbt 1.13.0 and 2.0.7 fix this bug.

Builds with the default serverConnectionType are not affected. In affected builds, we recommend removing the serverConnectionType setting, or upgrading to a patched version or later. In an affected build, the setting might look like this:

Global / serverConnectionType := ConnectionType.Tcp

The remediation was implemented by @stasimus.

🚀 updates

perf: Stop re-converting the classpath in compileOptions by @hoangmaihuy in #9622

🐛 bug fixes

fix: Guard diskcache against path traversal by @eed3si9n in #9605

fix: Name the platform in CrossVersion(module, scalaModuleInfo) by @kitbellew in #9620

fix: Avoid rewriting unchanged plugin descriptors by @unkarjedy in #9624

fix: Fixes scalacOptions in BSP using VirtualFileRef by @azdrojowa123 in #9610

fix: Fixes -V parsing in sbt runners by @anatoliykmetyuk in #9626

fix: Fixes filesystem traversal order affecting cache stability by @christianharrington in #9646

behind the scenes

ci: Remove cla-checker v1 by @eed3si9n in #9571

Update sbtn to 2.0.0-8753a981 by @eed3si9n in #9630

Full Changelog: v2.0.6...v2.0.7
Original source
Aug 21, 2026
Date parsed from source:
Aug 21, 2026

First seen by Releasebot:
Oct 13, 2026
sbt

1.13.0

sbt releases fixes for a remote code execution vulnerability affecting TCP server connections, alongside Scala 3.9 REPL support, parallel I/O operations, and other bug fixes. Default server connections are not affected.
⚠️ Remote code execution vulnerability fix

sbt team received a security report GHSA-943m-f264-54p4 from @stasimus that when the serverConnectionType is set to Tcp, an attacker is able to execute arbitrary code remotely via BSP, similar to a recent bug that was found in JSON-RPC. sbt 1.13.0 and 2.0.7 fix this bug.

Builds with the default serverConnectionType are not affected. In affected builds, we recommend removing the serverConnectionType setting, or upgrading to a patched version or later. In an affected build, the setting might look like this:

Global / serverConnectionType := ConnectionType.Tcp

The remediation was implemented by @stasimus.

🚀 updates

Scala 3.9 REPL support by @Gedochao in #9564

IO.jarParallel and IO.zipParallel by @hoangmaihuy in sbt/io#540

🐛 bug fixes

fix: Avoid rewriting unchanged plugin descriptors by @unkarjedy in #9613

fix: Fixes -V parsing in sbt runners by @anatoliykmetyuk in #9626

behind the scenes

ci: Remove cla-checker v1 by @eed3si9n in #9572

Update sbtn to 2.0.0-8753a981 by @eed3si9n in #9635

Bump IO to 1.13.0 by @eed3si9n in #9648

new contributors

@Gedochao made their first contribution in #9564

Full Changelog: v1.12.15...v1.13.0
Original source
Aug 21, 2026
Date parsed from source:
Aug 21, 2026

First seen by Releasebot:
Oct 13, 2026
sbt

2.0.6

sbt releases patched versions that fix a remote code execution vulnerability affecting builds configured to use TCP server connections. The update also preserves file timestamps in the local disk cache and improves update-task performance through file-hash caching.
⚠️ Remote code execution vulnerability fix

sbt team received a security report GHSA-m2pw-22cj-jq4v from @arpitjain099 that when the serverConnectionType is set to Tcp, an attacker is able to execute arbitrary code remotely via the sbt server. sbt 1.12.15 and 2.0.6 fix this bug.

Builds with the default serverConnectionType are not affected.

In affected builds, we recommend removing the serverConnectionType setting, or upgrading to a patched version or later. In an affected build, the setting might look like this:

Global / serverConnectionType := ConnectionType.Tcp

The remediation was implemented by @eed3si9n and @anatoliykmetyuk.

🐛 bug fixes

fix: Preserve file timestamp in local disk cache by @eed3si9n in #9559

🚀 updates

perf: Improve update task by caching file hashes by @takayahilton in #9559

Full Changelog: v2.0.5...v2.0.6
Original source

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sbt Release Notes

2.0.11

🐛 bug fixes

behind the scenes

2.1.0-RC1

Changes with compatibility implications

Scala 3.9

Publishing

Test summary

Test cache opt-out

workerMaxInstances and testTopology

clean task

Source dependency update

Identity map optimization

Task-level caching opt-out

🚀 Other updates

🐛 Bug fixes

⚡ Performance improvements

Behind the scenes

2.0.10

Changes with compatibility implications

🚀 updates

🐛 bug fixes

Behind the scenes

2.1.0-M3

Updates and bug fixes

Behind the scenes

New Contributors

2.1.0-M2

updates and bug fixes

behind the scenes

Similar to sbt with recent updates:

2.0.9

🐛 bug fixes

2.1.0-M1

Changes with compatibility implications

Scala 3.9 on metabuild

Publishing

clean task

Test summary

Test cache opt-out

workerMaxInstances and testTopology

Source dependency update

⚡ Performance improvements

🚀 Other updates

🐛 Bug fixes

Behind the scenes

2.0.8

🐛 bug fixes

2.0.7

⚠️ Remote code execution vulnerability fix

🚀 updates

🐛 bug fixes

behind the scenes

1.13.0

⚠️ Remote code execution vulnerability fix

🚀 updates

🐛 bug fixes

behind the scenes

new contributors

2.0.6

⚠️ Remote code execution vulnerability fix

🐛 bug fixes

🚀 updates

Curated by the Releasebot team