I built a Claude agent that runs Instagram DM ordering for a 7-location sushi chain

I built an AI agent that took over order-taking for a sushi chain with 7 locations. About 90% of their orders come through Instagram DMs, and until now one person typed every reply by hand. How it works: code watches incoming messages through the Meta API and hands each one to Claude (Sonnet 4.6) over the API. The model has a knowledge base with the full menu, ingredients, calories, allergens, delivery zones, hours, prep times and promos for all 7 spots.