One directory per article. Each is a self-contained Maven project with its own README.md, numbered documentation chapters under docs/, and captured real output under docs/output/ that a single script regenerates. Every figure quoted in an article came out of one of those files.

Directory	Article	What it demonstrates
`actuator-in-production/`	Spring Boot Actuator in Production	endpoint exposure defaults, securing Actuator, custom health indicators and how they hang
`spring-boot-startup-time/`	Why Your Spring Boot App Takes 8 Seconds to Start	`BufferingApplicationStartup`, JFR startup events, self time vs total time, the classpath-scan tax, the JDK 25 AOT cache
`configuration-properties/`	@ConfigurationProperties vs @Value in Spring Boot 4	relaxed binding measured three ways, record constructor binding, validation, IDE metadata generation
`profiles-and-config/`	Spring Boot Profiles Done Right	the precedence stack made visible, config trees and ConfigMaps, why a profile file loses to an environment variable
`spring-aop/`	Spring AOP Explained	every pointcut designator with real matches, JDK vs CGLIB proxies, six aspects that do not fire
`docker-images/`	Dockerizing Spring Boot 4: Layered Jars, Buildpacks, Distroless and Image Size Benchmarks	one service packaged nine ways and measured: size on disk and pushed, rebuild delta, startup, PID 1 and signals, jlink, the JDK 25 AOT cache
`kubernetes-deployment/`	Deploying Spring Boot 4 on Kubernetes	probe groups under a dependency outage, graceful shutdown under load four ways, JVM ergonomics per pod shape, CPU limits throttling GC, HPA on a Micrometer metric
`problem-details/`	Global Exception Handling with ProblemDetail (RFC 9457) in Spring Boot 4	thirteen failures under five handling setups, validation errors, i18n, content negotiation, errors outside MVC, silent 500s, decoding on the client
`resilience/`	Spring Framework 7's Built-in Resilience: @Retryable, @ConcurrencyLimit, and What's Left for Resilience4j	`@Retryable` and `@ConcurrencyLimit` counted invocation by invocation, retries inside transactions, where Resilience4j still earns its place, migrating from Spring Retry
`caching/`	The Spring Cache Abstraction: @Cacheable, @CacheEvict, Key Generators and the Self-Invocation Trap	the self-invocation trap measured four ways, the key collision `SimpleKeyGenerator` makes easy, eviction timing under a thrown exception, a rollback the cache keeps, and where this sits next to Hibernate's L2 cache
`spring-batch/`	Spring Batch on Boot 4.1: Jobs, Steps, Chunk Processing and Restartability	a job that fails mid-chunk and resumes exactly where it left off across two separate JVMs, skip vs. restart on the same poisoned row, the resourceless job repository that forgets a restart ever happened, and the `chunk(int)` vs `chunk(int, tx)` builder split
`spring-batch-partitioning/`	Spring Batch Partitioning and Parallel Steps: Scaling a 10-Million-Row Job	the real grid-size sweep at 10M and 300K rows (best speedup 1.42x, on 2 cores), `MultiResourcePartitioner` ignoring gridSize entirely, a rejected partition's `StepExecution` stuck at `STARTING` forever, and Spring Batch 6.0's new `JobOperator#recover` unsticking it

Articles whose text is kept here rather than only on the blog have it under <directory>/post/ — post.md for the body and meta.md for the title, excerpt and categories.

Running any of them

Each project needs a JDK 25 and Maven 3.9. docker-images also needs Docker, and kubernetes-deployment Docker plus a Kubernetes cluster; their READMEs list the rest:

cd <directory>
export JAVA_HOME=/path/to/jdk-25
mvn -DskipTests package
./scripts/run-all.sh          # regenerate every transcript under docs/output/

Licence

MIT — see LICENSE.