v4.0.0 — 2026-05-17

Added

• @ShuttleCargo annotation and a Kotlin compiler plugin that automatically injects the ShuttleCargoData
  serialization contract at compile time, removing the need to manually implement java.io.Serializable on cargo classes.
  Annotate a class with @ShuttleCargo and the plugin handles the rest:

  // Before
  class ProductModel(val id: String, val data: ByteArray) : java.io.Serializable
  
  // After
  @ShuttleCargo
  class ProductModel(val id: String, val data: ByteArray)

• ShuttleCargoData marker interface as the public type bound for all cargo, replacing raw java.io.Serializable in the public API
• Bill of Materials (BOM) module to manage Shuttle dependency versions
• MVI with Compose demo module
• Kover code coverage configuration across framework modules
• GitHub Actions workflow that publishes API documentation to GitHub Pages via Dokka on every push to main
• Code of conduct

Changed

• Migrated all Gradle build files from Groovy to Kotlin DSL
• Migrated Dokka to v2
• Migrated from Material 2 to Material 3 in demo apps
• Updated Gradle plugin to version 9.1.0 and migrated to Gradle toolchain
• Enabled Gradle configuration cache
• Test coverage increased to 100% lines of code across the framework, persistence, and room extension modules
• binder and ipcServiceMessengerDecorator in ShuttleService are now protected, tightening encapsulation
• Revamped README and contributing documentation
• Added API documentation link to README

Fixed

• ShuttleRoomDao.getCargoById returned a non-nullable ShuttleRoomData, causing an NPE when no record exists in the database; return type corrected to ShuttleRoomData?
• sender parameter was silently dropped in CargoShuttle.intentChooserCargoWith
• Unsafe cast operations in ShuttleBundle and ShuttleNavController replaced with safe fallbacks
• binder and ipcServiceMessengerDecorator in ShuttleService visibility corrected from public to protected
• Yoda-style comparisons in ShuttleRepository corrected to idiomatic Kotlin (null == x → x == null)
• Window insets rendering in demo apps

Removed

• enableJetifier property (no longer needed)