I like moving fast, but moving fast without structure usually creates more work later. Before I write the first real feature, I try to understand the boundaries of the system. What belongs in the frontend? What owns the data? Which parts will change often? Which decisions are expensive to reverse? I do not need a fifty-page architecture document. A clear folder structure, data model, flow diagram, and a few explicit decisions are often enough.
Why I Start With Architecture Before Code
A short note on why I prefer defining structure, responsibilities, and data flow before implementation.