What problem does it solve? Building a promotions system that applies the right discounts in the right order is error-prone: stacking rules, tiered thresholds, and BOGO logic often cause margin losses or negative order totals when implemented incorrectly. This Skill guides you through configuring native discount engines on Shopify, WooCommerce, and BigCommerce, or building a custom server-side evaluation pipeline. ## Core Features & Use Cases - Platform Configuration Guides: Step-by-step setup for automatic discounts, BOGO, and tiered pricing on Shopify, WooCommerce (Dynamic Pricing plugins), and BigCommerce (Promotions and Price Lists). - Custom Discount Engine: A TypeScript reference implementation that filters eligible discounts, sorts by priority, enforces stacking flags, and allocates percentage, fixed-amount, and BOGO discounts to cart lines. - Stacking and Safety Rules: Explicit combination settings, maximum discount caps, sale-item exclusions, and server-side recalculation at order creation. - Use Case: A merchant wants tiered quantity pricing (buy 5+ get 10% off, buy 10+ get 20% off) that never stacks with a site-wide coupon. Use this Skill to configure the rules on their platform or implement the evaluation logic in a headless storefront. ## Quick Start Ask the AI to set up a tiered quantity discount with BOGO support and stacking rules for your Shopify, WooCommerce, or custom storefront.
