Hi Spring fans! Welcome to another installment of This Week in Spring! As I write this, I'm on PTO in beautiful Santorini, Greece, catching up on some news and about to cruise the islands for some sightseeing. There's nothing quite like springtime in the Mediterranean! I couldn't dream of enjoying the weather during the spring season until I checked in on which way the wind was blowing in the Spring community, and so here we are! Let's dive right into it!

• In last week's installment of A Bootiful Podcast, I talked to both Dr. Venkat Subramaniam and James Ward, ahead of a talk that the three of us gave at Voxxed Days Amsterdam called Intelligent Kotlin.
• https://medium.com/javarevisited/your-retry-logic-is-probably-broken-spring-boot-4-just-fixed-that-for-you-dffe582fe6c9
• Spring AI SDK for AgentCore has reached 1.0!
• I've been loving Craig Walls' amazing series of Spring AI recipes. This latest one looks at using A2A to enable yet another kind of agent-to-agent communication with Spring AI
• Here's another one on using the TodoWriteTool to handle agentic planning
• Have you seen Toshiaki Maki's amazing Maven plugin to enforce JSpecify.dev null restrictions in Java code?
• Did you see the latest update on how Netflix uses Java (and Spring Boot, and Spring AI) in 2026?
• Spring AI 1.0.6, 1.1.5, and 2.0.0 M5 are all available now!
• Spring Shell 4.0.2 is available now!
• Spring Modulith 2.1 RC1, 2.0.6, and 1.4.11 released
• Spring Boot 3.5.14 are available now
• Spring Boot 4.0.6 available now
• Spring Boot 4.1.0 RC1 available now
• Spring for Apache Pulsar 1.2.17 are 2.0.5 are now available
• Spring for Apache Kafka 4.1.0 RC1, 4.0.5, and 3.3.15 available now
• Spring Security 2026.04 Releases containing CVE fixes
• Spring Authorizatyion Server 1.5.7 is available now
• Spring Inegration 7.1.0-RC1 available now
• Spring Vault 4.1.0 RC1 and 4.0.2 released