Generates Shopify Flow workflow JSON from a plain-language description of a business rule, covering scenarios such as inventory alerts, customer tagging, and order anomaly interception, ready to import into Shopify Flow. Use when the user wants to create, draft, or automate a Shopify Flow, or mentions Flow 自动化, 工作流, 库存预警, 客户打标, 订单拦截, or "build a Flow".