- Introduce starter modules for Tomcat and Jetty runtimes and rename the Kotlin serialization starter to match the Kotlinx module name.
- Fix a wide range of bugs including configuration property handling, testing utilities, SSL metrics, buildpack image builds, and Spring test alignment.
- Update documentation, deprecate outdated APIs, and upgrade numerous dependencies (e.g., Spring Framework 7.0.1, Hibernate 7.1.8, Jackson 3.0.2, Micrometer 1.16).
v4.0.0
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Fixed a wide range of bugs in Kafka security handling, Cloud Foundry integration, Spring Boot components, and resource cleanup.
Spring Boot Gradle plugin no longer auto‑configures gRPC when the Protobuf plugin is applied; opt‑in via an empty grpc block in the protobuf extension.