/layers-domain

Assumes /layers-intro has been loaded. This skill is a library of techniques, not a script — see "How to use these skills" there.

The domain layer maps what exists in the real world independently of any product: the concepts, terminology, processes, relationships, and mental models users bring with them. This is observation, not design.

The decisions this layer makes

• What the key concepts in this domain are, and how they relate
• What language people use — and where it conflicts or diverges
• Where the natural seams are: communities that use the same words differently
• What events and processes structure the domain's activity over time

If the domain is already well understood and uncontested, you may not need this layer — go straight to the conceptual model.