2.0.0-alpha.2 - 2026-01-27

This is an alpha release of Detekt 2.0.0. It's built against Kotlin 2.3.0, Gradle 9.3.0, AGP 9.0.0 and is tested against JDK 25.

Please note that in order for this alpha of Detekt to run in an AGP 9.0.0 project, you will need to disable the new DSL and built-in Kotlin by adding these properties to gradle.properties:

android.newDsl=false
android.builtInKotlin=false

Further updates on builtInKotlin support in Detekt Gradle Plugin will be available here.

Notable Changes

• Bump Kotlin to 2.3.0 - #8743
• Bump Gradle to 9.3.0 - #8982
• Bump AGP to 9 - #8553
• Bump minimum AGP to 8.2.2 - #8931
• Enable rules by default that are now standard in ktlint 1.8.0 - #8849
• Bump KtLint to v1.8.0 - #8843
• New ktlint Rule: ThenSpacingRule - #8850
• New Rule: UnnecessaryInitOnArray - #8784
• New Rule: UnnecessaryFullyQualifiedName - #8917

Breaking Changes

• Rename documentation to comments - #8889
• Rename empty to emptyblocks - #8888
• Rename bugs rules to potentialbugs - #8887
• Remove UnnecessaryAnnotationUseSiteTarget rule - #8861
• Rename RuleSet.Id to RuleSetId - #8810
• Rename rule CommentOverPrivateMethod to DocumentationOverPrivateMethod - #8778
• Refactor AbsentOrWrongFileLicense - #8969
• Compile DGP against kotlin-plugin-api only not KGP itself - #8756

Changelog

• fix(UnusedImport): detect named companion objects correctly - #9005
• Remove unnecessary tests - #8985
• Pass the correct type to TestConfig - #8984
• Remove special case for active at TestConfig - #8983
• TestConfig over yamlConfigFromContent - #8974
• Skip underscore placeholders for unused variables on NonNameShadowing rule (#8962) - #8965
• docs: clarify function type handling in ForbiddenMethodCall - #8964
• Check if there suspend function in try block before reporting - #8950
• Fix SubpluginArtifact coordinates for dev.detekt:detekt-compiler-plugin -

Dependency Updates

• Bump Kotlin to v2.2.21 - #8807
• Bump AGP to 8.13.2 - #8914
• Add transitive assertj dep of assertj core in detekt-test-assertj - #8923
• chore(deps): update gradle to v9.2.1 - #8868
• fix(deps): update dependency com.android.tools.build:gradle to v8.13.1 - #8838
• chore(deps): update gradle to v9.2.0 - #8820

Housekeeping & Refactorings

• Bump min Node version for website build - #8875
• Enable ValueArgumentComment for detekt project - #8854

Contributors

We would like to thank the following contributors that made this release possible: @3flex, @BraisGabin, @atulgpt, @chao2zhang, @cortinico, @csbiy, @forketyfork, @marschwar, @rschattauer