Keeping an online store catalog in sync with n8n + a local LLM (Ollama)

I run online stores as a side project, and the catalog was always the part that quietly broke: supplier prices and stock change constantly, so the listings drift out of date until a customer orders something that's actually unavailable or mispriced. I wanted to remove the manual checking entirely and only spend human attention on the cases that really need it. So I built a small automation that keeps the catalog in sync on its own. Here's what it does, the stack, and — more importantly — what I...