Design and audit the core e-commerce domain model — products, variants, SKUs, options, collections, attributes, taxonomy, faceted search and pagination. Language- and platform-agnostic. Triggers: modeling a catalog, reviewing an existing product schema, designing filtering/search.
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Design the backbone of any storefront: a product catalog model that survives variants, bundles, localization, and faceted search — independent of language, framework, or database.
Note: This skill may create or modify files in your project (a model spec or schema doc). It will ask before writing.
Gather: business context (physical/digital/services, single vs multi-vendor, B2C/B2B), scale (SKU count, variant explosion, locales/currencies), and goal (model from scratch, audit an existing schema, or design taxonomy + filtering).
| Mode | Trigger | Output |
|---|---|---|
| Model | model | Entity model spec: Product, Variant, SKU, Option, Collection, Attribute |
| Audit | audit | Gap analysis of an existing schema against commerce best practices |
| Taxonomy | taxonomy | Category tree, attribute schema, faceted-search and pagination design |
The canonical separation that prevents 90% of catalog pain:
| Entity | Is | Is NOT | Key fields |
|---|---|---|---|
| Product | The marketing/SEO unit ("Acme Tee") | A buyable thing | title, description, slug, status, brand |
| Variant | A buyable combination ("Tee / Red / M") | A category | option values, price, weight, barcode |
| SKU | The stock-keeping identifier | A variant's price | code, variant_id |
| Option | An axis of variation (Color, Size) | A value | name, position |
| Collection | A merchandising grouping | A taxonomy node | title, rules (manual/automatic) |
Rule: Price, inventory, and barcode live on the Variant, never the Product. A product with no options still has exactly one variant.
For the full field-level spec, identifiers (GTIN/MPN), bundles/kits, and digital vs physical modeling, see references/data-model-spec.md.
material: cotton, sleeve: short). Drive facets. Define a controlled vocabulary — free-text attributes break filtering.Attribute typing: text | enum | number | boolean | measurement. Enums must reference a value list. Measurements carry a unit.
enum/boolean/measurement attributes, not free text.| Request | Output |
|---|---|
| Model from scratch | Entity spec + ER sketch + identifier strategy |
| Audit schema | Verdict per entity: COMPLIANT / CONCERNS, with fixes |
| Design taxonomy | Category tree + attribute schema + facet plan |
A schema is COMPLIANT when price/inventory sit on variants, every product has ≥1 variant, attributes are typed against vocabularies, and URLs are stable.
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