Can I vibe code Starshipit?

Build a multi-carrier shipping middleware service in Node.js/TypeScript using Express and PostgreSQL to replace Starshipit dispatch workflows.

1. DATA MODEL:
- Orders: id, platform_order_id, recipient_address (jsonb), items (jsonb), weight_grams, status (unfulfilled, fulfillment_processing, shipped, error).
- Shipments: id, order_id, carrier_id, tracking_number, label_url, zpl_data, cost, status.
- CarrierCredentials: id, carrier_code (e.g., auspost, dhl), account_number, api_key, api_secret, active.
- ShippingRules: id, priority, condition_json (e.g. weight > 500g), assigned_carrier, assigned_service_code.

2. CORE FUNCTIONALITY:
- Webhook endpoint receiving order creation payloads from Shopify/WooCommerce.
- Shipping Rule engine evaluating order weight, address, and item count to select carrier and service.
- Integration layer targeting Karrio or EasyPost API to generate shipping labels and tracking numbers.
- Webhook endpoint for carrier tracking updates that pushes fulfillment status back to the e-commerce store platform via REST API.
- Thermal Print Dispatch: Endpoint that pushes raw ZPL payloads to a PrintNode API instance connected to local warehouse thermal printers.
- End-of-Day Manifest Generator: Group daily active shipments by carrier and invoke the carrier manifest API to generate scan sheets.

3. FAILURE MODES & EDGE CASES:
- Address Validation Failure: If carrier API rejects recipient address, set order status to address_validation_failed and alert via webhook.
- Carrier API Timeout: Fall back to secondary configured carrier or retry up to 3 times with exponential backoff before throwing error.
- Printing Agent Offline: Cache ZPL payloads in PostgreSQL queue with status pending_print until PrintNode reports printer online.

4. OUT OF SCOPE:
- Do not write native SOAP carrier client connectors from scratch; rely on Karrio/EasyPost unified abstractions.
- No self-hosted mobile barcode scanner applications.

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