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A code-forward tour of Spring Batch 6 on Spring Boot 4 and Java 25 — the resourceless repository, the new ChunkOrientedStep engine, Spring Framework 7 retry, the CommandLineJobOperator, and how stop and recover actually work under the hood.
Wiring Flyway into a Spring Boot 4.1 / Java 25 app with a Docker-Compose Postgres - including the Boot 4 auto-config modularization gotcha that makes a missing starter look exactly like a missing library.
Three validation mechanisms wear one annotation vocabulary in Spring MVC. Only one hands you a ConstraintViolationException — the rest give you Spring's own web exceptions. Here's the map, with live proof.
AI agents are a new kind of reader, and they don't want your rendered HTML. llms.txt is a tiny Markdown convention that hands them a clean index instead. Here's what it is, why it matters now, and how I wired it into my own Spring Boot site, with one URL path serving two different files by host.