Hi, Spring fans! Welcome to another installment of a Bootiful Podcast! In this installment I talk to the legendary Rossen Stoyanchev on API versioning, declarative interface clients, RestTestClients, and more!

On behalf of the Spring AI engineering team and everyone who has contributed, I'm happy to announce that Spring AI 2.0.0-M1 has been released and is now available from Maven Central.

Spring AI 2.0.0-M1 represents the first milestone of the 2.x series, built on Spring Boot 4.0 and Spring Framework 7.0 with a Jakarta EE 11 baseline. This major platform upgrade, contributed by Dmitry Bedrin with Paul Bakker from Netflix (#4774), aligns Spring AI with the latest Spring ecosystem.

Release Summary

This release includes 67 improvements, bug fixes, and documentation updates. Key focus areas include:

• Improvements: 25 enhancements to expand capabilities and functionality
• Stability: 7 bug fixes addressing community-reported issues
• Documentation: 32 improvements to help developers
• Security: 3 dependency upgrades for enhanced security
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On behalf of the team and everyone who has contributed, I am pleased to announce that Spring Framework 7.0.2 is available now.

Spring Framework 7.0.2 ships with 74 fixes and documentation improvements. This version will be shipped next week with Spring Boot 4.0.1.

Project Page | GitHub | Issues | Documentation

On behalf of the team and everyone who has contributed, I am pleased to announce that Spring Framework 6.2.15 is available now.

Spring Framework 6.2.15 ships with 31 fixes and documentation improvements. This version will be shipped next week with Spring Boot 3.4.13 and 3.5.9.

Project Page | GitHub | Issues | Documentation

As AI agents connect to more services—Slack, GitHub, Jira, MCP servers—tool libraries grow rapidly. A typical multi-server setup can easily have 50+ tools consuming 55,000+ tokens before any conversation starts. Worse, tool selection accuracy degrades when models face 30+ similarly-named tools.

The Tool Search Tool pattern, pioneered by Anthropic, addresses this: instead of loading all tool definitions upfront, the model discovers tools on-demand. It receives only a search tool initially, queries for capabilities when needed, and gets relevant tool definitions expanded into context. This achieves significant token savings while…

On behalf of the tools team, it is my pleasure to announce the release of the Spring Tools 5.0. This new major release comes with several new features and updates:

• Spring Tools 5 supports Spring Framework 7, Spring Boot 4, Spring Data 2025.1, and more: including extensive support for the new API versioning, functional bean registration, JSpecify checks, and AOT generated data repositories

• Spring Tools is ready for the AI era of coding: it supports and integrates with Cursor, Copilot for Visual Studio Code as well as Copilot for Eclipse

• A completely new logical project structure view around stereotypes: support for pre-defined and custom stereotypes as well as grouping, giving you a unique Spring specific perspective of your project - available in Visual Studio Code, Cursor, and Eclipse

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On behalf of the team and all contributors, I am pleased to announce that Spring Shell 4.0.0-M2 is now available on Maven Central!

What's new?

This second milestone release continues our efforts toward a modern version of Spring Shell, aligned with the rest of the Spring portfolio.

This milestone includes several bug fixes and improvements based on the feedback we received after the 4.0.0-M1 release.

Major changes include:

• Upgrade to Spring Framework 7.0 GA and Spring Boot 4.0 GA
• Migrate nullability annotations and checks to jSpecify
• Improve project modularity to streamline dependencies
• Improve command programming model and APIs
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Hi, Spring fans! Welcome to another installment of This Week in Spring! I am in lovely New Jersey, the Garden State, as I write this and I spent most of the last week in New Orleans. It's been a busy week in the Spring community and beyond and so you know what that means? There's a ton of stuff to look into! Let's dive right into it!

• Spring gRPC 1.0.0 is now GA! Huzzah! Hooray!
• Want to learn more about the new release direct from the Spring team? Join them, live, for this webinar on the 11th.
• Good news, everybody, Spring Shell 4.0.0-M2 is available now!.
• Spring AI 1.1.1 is available now.
• I really enjoyed this discussion with fellow Spring Developer Advocate Dan Vega on his new book The Fundamentals of Software Engineering, and you can too.
• Did you see this amazing Kotlin DSL for HTMX, called KHTMX?
• Speaking of Kotlin, have you started your journey with this amazing language? Check out this guide on the Spring portal.
• While not strictly speaking related to Spring, I think this article on Idempotency Keys - a very useful design philosophy and pattern - by fellow Java Champion Gunnar Morling is well-worth a read if you care about building reliable distributed systems architectures…