Vertical Slice Architecture packages each feature into a self-contained slice — 1 request, 1 handler, 1 data layer, 1 test set. Result: high cohesion, low coupling, and faster, safer evolution of the codebase.
VSA organises code by business feature rather than technical layer, meaning each change is confined to a single, self-contained slice.
This design brings 3 clear advantages: predictable impact, quicker reviews, and safer releases with minimal ripple across the codebase.