Hi, Spring fans! How're you doing this fantastic October afternoon? I'm on a train returning from Frankfurt, Germany, where I spoke at the Cloud Foundry Day Frankfurt event about how awesome it is to build an application with Spring Boot and Cloud Foundry. Yesterday I was in Antwerp, Belgium, and did two workshops, each of three hours duration. Now, I'm on my way back to Antwerp to return to Devoxx Belgium. I'll be doing a talk on Spring Boot 4; another joint talk with James Ward and the Spring AI leads Dr. Mark Pollack and Christian Tsolov; and a joint talk with GraalVM founder Thomas Weurthinger. It's going to be amazing! Then, Thursday, it's off to Amsterdam for the Amsterdan JUG, where I'll also be copresenting with James Ward. Join us!

Let's dive into this week's roundup!

• Securing MCP servers with Spring AI
• Introducing Jackson 3 support in Spring
• Spring AI 1.1.0-M3 is available now
• Spring Cloud 2025.1.0-M3 is released
• in last week's installment of A Bootiful Podcast, I talked to Dr. Kris de Volder
• Spring AI 1.0.3 is available now
• I love this look at JSpecify and null safety in Spring Boot 4 by friend-of-the-community Michael Simons
• a nice post on how to configure multiple LLMs with Spring AI
• Hurray! Jackson 3 - the JSON encoding library - is out (and supported in Spring Boot 4)
• have you been following those epic posts on API design by Spring team alumnus and legend Arjen Poutsma?
• did you see that the MCP Security project is looking ever more polished