What, Harness, How: The Three Layers of AIUP
One of the recurring questions I hear about Spec-Driven Development is this: where does the spec end and the implementation begin? The line is often blurry. Specs leak into class[...]
AI Writes Code. Engineers Build Software.
With Claude Code and similar tools, I do not write much code by hand anymore. The AI does it for me. And most of the time, the result is good. For a moment this looks like the end[...]
Why in Spec-Driven Development the Spec Must Be Readable for All Stakeholders
In Spec-Driven Development (SDD), the specification is at the center. It is not just a document for developers or architects. It is the shared foundation for everyone who works on[...]
How and Why to Trace Use Cases and Tests
When you build business software, the same question keeps coming back: why does this code exist? The honest answer is almost always: because some business person needed it. A[...]
Use-Case 2.0: The Forgotten Practice That Solves What User Stories Can’t
Many teams today treat user stories as the only way to capture requirements. But there is an older, proven technique that scales better and provides something user stories[...]
Why Spec-Driven Development Tools Fail in the Enterprise
The spec-driven development (SDD) movement is gaining momentum. Tools like Amazon Kiro, GitHub Spec Kit, and BMad Method promise to bring structure to AI-assisted coding. And they[...]
AI Tools for Developers Are Not Enough
Why are we putting so much energy into tools for the part of software development that is most likely to be automated? Why are we not building much more AI support for the rest of[...]
BMAD vs. Spec-Driven Development: Why AI Needs Better Specifications
AI is not only accelerating coding. It is shifting the center of gravity in software development. Implementation is becoming easier. Specification is becoming more important.[...]
Two Flavors of Spec-Driven Development and Why I Clearly Prefer One
Spec-Driven Development is becoming popular, especially in the context of AI-assisted software development. But when I look at what people mean by it, I see at least two very[...]
Why Vaadin and jOOQ Are a Natural Fit for AI Driven Development
Over the last two years, I have been working heavily with AI-assisted and agent-based development. One observation keeps coming back: the choice of technology stack matters far[...]
Business Use Cases vs System Use Cases
The term “use case” is widely used in software development, but not always consistently. Teams often mix different abstraction levels when writing them, which leads to[...]
Why Spec-Driven Development Can Be Iterative, Incremental, and Agile
Whenever I talk about AIUP and Spec-driven Development, I often hear the same concern: “This sounds like Waterfall.” That reaction is understandable. For many developers,[...]
