Hi, Spring fans! Welcome to another installment of This Week in Spring, which I write from the paradise-like environs Barcelona, Spain, where I was lucky enough to be a part of the amazing Vaadin Create event today and tomorrow. It's been an amazing few days, but those few days are just a small part of the week, and what a week it's been! Let's dive into the the weekly roundup!

• yet another amazing post from Craig Walls in his ongoing series looking at Spring Ai - Speeding Up RAG with Faster Embeddings
• and another one (DJ Khalid!): Rendering Rich UIs with MCP Apps
• I am so curious about the wide and wonderful world of agentic development these days. I was especially keen on learning how Netflix made AI coding agents more efficient with JetBrains IDE intelligence
• speaking of JetBrains, I was overjoyed to talk to JetBrains' Anton Arhipov last week about the amazing world of AI Development with JetBrains IDEs in A Bootiful Podcast.
• did u every want to add a reasoning model to your Spring Boot application as a plain Mavend dependency? Well, now you can with Quixotic AI
• there have been a ton of new releases! Get the bits while they're hot! Spring AI 2.1.0-RC1 and 2.0.2 available now
• SPring Boot 4.0.9 available now
• SPring Boot 4.1.2 availabel now
• Spring Boot 4.2.0-RC1 available now
• Spring Cloud 2025.1.4 (aka Northfields) Has Been Released
• Spring Cloud 2026.0.0-RC1 (aka Paddington) Has Been Released
• Spring LDAP 4.2.0-RC1 available now
• Spring LDAP 4.0.6 and 4.1.2 available now
• Spring Security 7.2.0-RC1 available now
• Spring Security 7.0.8 and 7.1.2 available now
• Spring Session 4.2.0-RC1
• Spring Modulith 2.2 RC1, 2.1.2, 2.0.9, and 1.4.14 released](https://spring.io/blog/2026/10/23/spring-modulith-2-2-rc1-2-1-2-2-0-9-and-1-4-14-released)
• Spring Modulith 6.1.0-RC1 and 6.0.6 available now!
• Spring Data 2026.0.2 and 2025.1.8 released
• Spring Web Services 5.0.3 avaialble now
• Spring Web Services 5.1.0 Rc1 availablen ow