I need a single, self-contained n8n file that automates every step of my multichannel fulfilment cycle. The flow must pick up new orders the moment they appear in Shopify, WooCommerce, Etsy, Walmart Marketplace and Amazon Seller Central, choose the correct warehouse, create the shipping label (USPS, UPS or FedEx as appropriate), then push the tracking number straight back to the originating platform and customer. The same workflow should watch inventory levels in real time, write every stock movement to my Airtable base, and fire low-stock or exception alerts to Slack or WhatsApp. An AI step will look ahead to predict stock-out dates and raise purchase orders automatically before that happens. For reporting, I want an automated daily inventory snapshot, a weekly sales & demand forecast, and a monthly PDF performance summary—all generated inside n8n and stored or emailed on schedule. Because I maintain and tweak flows myself, everything must live in one maintainable JSON export with clear node naming, comments and environment-variable placeholders for every credential or API key. Connections that need OAuth or private-app tokens should come with a short guide so I can drop in my own keys later. Deliverables within 3 days: • Complete n8n workflow (.json) combining all tasks above • Inline documentation + separate connection guide showing where to place credentials and webhooks • Proof of testing: sample orders processed, shipping labels generated, Airtable rows updated, alerts fired • Light customisation hooks so I can add future channels, carriers or alert destinations without rebuilding the flow Acceptance will be based on importing the file into a clean n8n instance, running end-to-end tests with my sandbox APIs, and confirming that every report and alert triggers as described.