The Main Thread
Markus EiseleDeep dives into Quarkus, AI tooling, and the architecture decisions that actually matter for senior Java engineers.
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the-main-thread.comLatest Issues
How to profile JVM workloads in Kubernetes without custom app images
A JVM in Kubernetes is still a JVM. The messy part is everything wrapped around it.
On a laptop, I can run jcmd, open JDK Mission Control, and usually get an answer before the coffee cools. In a cluster, that same JVM is now behind pods,...
Why Quarkus Agent Skills Matter More Than Another Model Upgrade
Phillip Kruger from the Quarkus team pointed me to this quarkus-agent-mcp testing thread when we were talking about Quarkus Agent MCP and Quarkus Skills. I like threads like this because they are hard to polish into marketing. You get the w...
Quarkus JAR Tree Shaking: Trim Dead Weight From JVM Builds
./mvnw package finishes, you open target/quarkus-app/lib/main/, and the totals are honest: this is what the JVM will load and what your registry layer will push. A lot of those classes will never run. They are along for the ride because...
Build Hybrid MCP Tool Agents in Quarkus
I like agent workflows right up until somebody turns trim().toUpperCase() into a planning problem.
Some steps in a pipeline need language judgment. Others need to do one deterministic thing, do it fast, and stop there. Hashing a payload,...
The Senior Developer's New Job Is Saying No
The junior developer on your team shipped three new services last week. With AI. All of them start, answer requests, and have tests. None of them should exist.
That used to be a rarer problem. For a long time, software teams spent most of...
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Authors
The writers behind this newsletter.
I’ve spent 20+ years helping Java systems adapt without breaking. Here I share the architecture, tools, and thinking behind that work. Java Champion · Developer · IBM Research.
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