/add-checkout

Create comprehensive shopping cart and checkout flow. Implement cart state management with Context API or Zustand. Create cart UI component with item list, quantity controls, and remove buttons. Calculate totals including subtotal, tax, shipping, and discounts. Add shipping address form with validation. Implement checkout form with payment information section. Add order summary with itemized breakdown. Integrate payment processing (Stripe, PayPal). Create order confirmation page with order number and details. Send confirmation email with receipt. Implement cart persistence with local storage. Add discount code functionality. Reference forms-workflow-agent for form handling and validation. Test entire checkout flow thoroughly.