Add 5 pi extensions: pi-subagents, pi-crew, rpiv-pi, pi-interactive-shell, pi-intercom

extensions/rpiv-pi/skills/write-test-cases/examples/order-placement-flow.md

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+---
+id: TC-ORD-001
+title: "Place order with physical products"
+feature: "Order Management"
+priority: high
+type: functional
+status: draft
+tags: ["orders", "checkout", "payment", "happy-path"]
+commit: abc1234
+---
+
+# Place order with physical products
+
+## Objective
+Verify that a customer can browse products, add them to cart, complete checkout with a valid credit card, and receive an order confirmation. This is the primary revenue-generating flow.
+
+## Preconditions
+- Customer account exists with verified email
+- At least 2 physical products are published with available inventory
+- Stripe test mode is configured with valid API keys
+- Customer is logged into the Customer Portal
+
+## Steps
+| # | Action | Expected Result |
+|---|--------|-----------------|
+| 1 | Navigate to product catalog page | Product listing displays with prices and availability |
+| 2 | Click "Add to Cart" on first product | Cart badge updates to show 1 item, toast confirms addition |
+| 3 | Click "Add to Cart" on second product | Cart badge updates to 2 items |
+| 4 | Click cart icon in navigation header | Cart drawer slides open showing both products with quantities and subtotal |
+| 5 | Click "Proceed to Checkout" | Checkout page loads with shipping address form |
+| 6 | Enter valid shipping address and select shipping method | Shipping cost calculates and order total updates |
+| 7 | Enter valid test credit card (4242 4242 4242 4242) | Card field shows validated state with card brand icon |
+| 8 | Click "Place Order" | Loading spinner appears, then redirects to order confirmation page |
+| 9 | Verify order confirmation page | Order number displayed, line items match cart, total matches checkout |
+
+## Postconditions
+- Order record created in database with status "pending_fulfillment"
+- Order confirmation email sent to customer's email address
+- Inventory quantity decremented for both purchased products
+- Payment charge captured in Stripe (verify in Stripe dashboard)
+- Webhook dispatched to fulfillment service with order details
+- Audit log entry created with action "order.created" and customer ID
+
+## Edge Cases
+- Order with quantity > 1 of same product — verify inventory deducts correct amount
+- Order with product at maximum inventory — verify "last item" handling
+- Payment gateway timeout — verify order is not created, customer sees retry option
+- Browser back button during payment processing — verify no duplicate charges
+- Coupon code applied at checkout — verify discount reflected in total and payment
+
+## Notes
+- Related TCs: TC-ORD-002 (cancel order), TC-ORD-003 (refund order)
+- Dependencies: Stripe test environment, fulfillment webhook endpoint
+- Known issues: Intermittent Stripe webhook delay (up to 30s) may affect postcondition verification