Stubborn Contract 0.1.0

First stable release of the official continuation of Spring Cloud Contract, on a current stack and published to Maven Central.

Highlights

• Modern stack — Java 17+ (tested on 21 & 25), Spring Boot 4.1 / Framework 7 / Jackson 3, no spring-cloud-build.
• Spring-free messaging building blocks — Kafka, RabbitMQ, JMS, held to a transport-neutral conformance TCK against real brokers; usable from any JVM runtime (Spring, Quarkus out of the box).
• Zero-config JSON conversion for typed @KafkaListener / @RabbitListener / @JmsListener parameters.
• Groovy out of the core and the tests — easier to maintain and contribute to (JUnit 5 + AssertJ/Mockito); Groovy DSL contracts still fully supported.
• Drop-in SCC compatibility — existing contracts, WireMock stubs, and spring.cloud.contract.stubrunner.* config keep working.

Get it

<dependency>
  <groupId>sh.stubborn</groupId>
  <artifactId>stubborn-contract-dependencies</artifactId>
  <version>0.1.0</version>
  <type>pom</type>
  <scope>import</scope>
</dependency>

##Known issue

• Kafka producer-verify path can double-encode a payload when the app producer uses JsonSerializer (stubborn-sh/stubborn-contract#164). Fix targeted for 0.1.1.

Migration guide:

https://docs.stubborn.sh/contract/migration/from-spring-cloud-contract