Dan Vega

A hands-on Spring Boot 3 to 4 migration: upgrade a real app, then fix Jackson 3, modular starters, the missing H2 console, test imports, and JSpecify.

Spec-driven development without the team process.

Learn Spring AI TypeSafe by building a model router from an empty app.

Use the Jev Spring Boot Starter to call TypeSafe's Jev API with one dependency and an injected JevClient, then see how Spring Boot 4 auto-configuration works.

Use Claude Code skills for podcast automation: edit audio, create show notes, prepare a Transistor upload, and open a spring.io PR after the episode is live.

Learn Java structured concurrency in JDK 27 with a runnable example comparing sequential calls, virtual threads, and StructuredTaskScope failure handling.

Call TypeSafe Jev from Java and Spring Boot with RestClient.

How I built Content OS with Claude Code and Spring Boot to manage videos, blog posts, and newsletters, and what changes when you build software for one user.

Render real ColdFusion .cfm templates inside a Spring Boot app using the BoxLang Spring Boot starter and one undocumented boxlang.suffix property.

Learn the 5 steps of AI adoption mapped out by Boris Cherny, creator of Claude Code, and how to move from copy-pasting code to supervised autonomy.

Can you trust AI-generated code?

Learn a practical workflow for upgrading dependencies with AI, using scope, scale, and stakes to decide when to reach for an LLM to patch your projects.

Learn how to build Spring AI guardrails with SafeGuardAdvisor, custom PII masking, and output rails to stop prompt injection and data leaks.

Learn what that docker-compose.yml in every Java repo actually does.

Build a Claude-style 'Calling tool...'

Embabel 1.0 is GA.

My complete 10-stage content creation workflow for YouTube: ideation, packaging, AI rough cuts, repurposing videos into blog posts, Shorts, and a newsletter.

Learn how Spring AI 2.0 validates LLM JSON against your schema and automatically retries failures with self-correcting structured output.

Can you use Java for AI?

Spring Boot 3.5 reached end of life in June 2026 and every 3.x branch is now unsupported.

Port 8080 already in use?

Spring AI 2.0's tool search brings dynamic tool discovery to Spring Boot—load tools on demand instead of into every request to cut token usage and cost.

Learn to build custom Spring AI advisors with the BaseAdvisor interface to log available tools, track tool invocations, and count token usage on every LLM call.

UI.sh is a collection of agent skills from the Tailwind CSS and Refactoring UI team that give Claude Code and Codex the polish of a senior UI designer.

Spring AI gives you two ways to call an LLM.

X released MCP servers for its API and docs.

Spring Boot 4.1 adds type-safe property paths to Spring Data, replacing stringly typed references in sorting, criteria queries, and composite paths.

Spring Boot 4.1 adds @RedisListener, one annotation that brings Redis Pub/Sub in line with @KafkaListener and @RabbitListener.

Learn how Spring Boot 4.1's new InetAddressFilter protects your applications against Server-Side Request Forgery (SSRF) attacks with a single bean definition.

Spring Boot 4.1 adds lazy JDBC connection fetching via spring.datasource.connection-fetch.

Build a gRPC server and client in Spring Boot 4.1 with Spring gRPC — using @GrpcService, protobuf, and the new starters from start.spring.io.

Learn how to externalize Spring Modulith application events to Apache Kafka so other systems can react to changes happening inside your modular monolith.

Produce and consume your first Apache Kafka message with Spring Boot.

Learn how Spring Modulith's event publication registry persists and replays failed events across restarts, giving you a transactional outbox with no message broker.

Learn how Spring Modulith helps you build a modular monolith in Spring Boot with enforced module boundaries, application events, and verified architecture.

Add tools and MCP servers to your Embabel agents in Java.

A first look at Embabel, Rod Johnson's framework for building agentic AI flows on the JVM.

Build GraphQL APIs in Java with Spring Boot 4 and Spring for GraphQL.

Build an autonomous coding agent in Spring AI with the Spring AI Agent Utils library.

AI Agent Search

Learn best practices for error handling with Spring's RestClient, including global exception handlers, custom exceptions, Problem Detail responses, and built-in retry with resilience methods in Spring Framework 7.

Most AI agents can search the web.

JDK 26 introduces JEP 500, which warns developers when final fields are mutated through reflection.

How I built a terminal user interface for the Spring Initializr using Tambu UI, a new Java TUI framework, and GraalVM native images to streamline my development workflow.

Spring AI prompt caching cuts your Anthropic Claude API costs.

The Ralph Loop is a bash script that runs your AI coding agent with a fresh context every iteration.

OpenAI released Codex, a new GUI for their coding agent.

Learn how to use the new spring-boot-starter-opentelemetry in Spring Boot 4 to add observability with traces, metrics, and logs—no Actuator required.

Learn how to build a REST API with Spring Boot 4 in minutes.

Learn how to load resources in Spring Boot using the Resource interface.