build-data

name	build-data
description	Build a feature's data/ layer — data-type namespaces and the State spec. The first, foundational feature phase.
input	feature
output	feature

Create the feature's data/ layer (pure spec; depends on nothing but @adobe/data and other data/ declarations):

• one namespace folder per data type — <type>/{<type>.ts, schema.ts, public.ts, <helper>.ts};
• data/state/ — the State aggregate plus its pure transforms/derivations.

The schema is the single source of truth; the type derives from it (Schema.ToType). Helpers are pure and unit-tested. Run this first — every other layer imports data/.

The how is in the auto-loading rules: features/data/index.md, data/state.md, and namespace.md.