The Main Thread
Markus Eisele, Alex Soto BuenoDeep dives into Quarkus, AI tooling, and the architecture decisions that actually matter for senior Java engineers.
| Platform |  | Pricing | Only free issues | Publishes | Daily |
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Put OPA in Front of Your Quarkus MCP Tools
opa_decision={"allow":false,"skillId":"pptx_export","reasonCodes":["SCOPE_NOT_ALLOWED"]}
That log line records an enforced decision. The filesystem restriction lives in policy. It does not depends on a model hopefully following an ins...
Spec-Driven Development Needs an Exit Strategy
Open a repository after six months of spec-driven agent work and you may find a second system sitting next to the code. Requirements, research notes, high-level designs, low-level designs, implementation plans, task lists, review reports, a...
Build Your First Hardened Quarkus Image with Jib and Java 25
The final Quarkus service in this article has no Dockerfile. Maven packages the application as a Quarkus fast-jar, Jib turns that distribution into OCI layers, and the Red Hat Hardened OpenJDK 25 image supplies the runtime.
That short buil...
Agentic Engineering Still Needs Human Judgment
510 is a strange number to write about.
It is not a round anniversary. It does not look good on a sticker. It has no obvious meaning unless you already know the counter.
For me, it means 510 daily posts on The Main Thread.
That is a lot...
Give IBM Bob a Memory of the Quarkus Codebase
Quarkus is a hard repo for a coding agent to search with plain tools. This might be the only thing it has in comon with some pretty large legacy projects out there. As I can not really share examples with customer projects, I decided to use...
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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.
IBMer, Java Champion, Teacher, Radio Collaborator in Onda Cero, and Writer of several books for O'Reilly and Manning
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