spend-optimizer
Audit subscriptions AND optimize credit card rewards. Analyzes bank CSVs to find recurring charges, categorize spend, identify which card each charge should be on, and calculate potential rewards. Use when user says "audit subscriptions", "optimize my cards", "maximize rewards", or "analyze my spending". Outputs interactive HTML with subscription management and card optimization.
shopify-developer
Comprehensive Shopify development skill for theme architecture, Liquid, Admin API, Storefront API, metafields/metaobjects, checkout extensibility, Shopify Functions, webhooks, and platform limits. Use when implementing or debugging Shopify app/theme work, API integrations, checkout customizations, or data modeling. For Hydrogen/headless framework specifics, use Context7 MCP for current framework docs.