SKU Generator — illustrative example

INPUT
Rule: category-color-size. Products: mug blue small and mug blue large.

RESULT
Proposed SKUs: MUG-BLU-S and MUG-BLU-L. Check both against the existing SKU inventory.

REVIEW
SKU rules need stable attributes and a collision check. Avoid embedding changeable promotional wording or assuming codes are unique because they look different.

This is a teaching example, not a live execution record.