I’m looking for a simple, proof-of-concept AI replier that connects to my WhatsApp Business number and automatically answers incoming messages with sales and promotional content in clear English. Scope • Incoming message is captured through the WhatsApp Business API (or an equally quick workaround such as Twilio’s sandbox if that speeds things up). • The script uses a lightweight AI layer—OpenAI, Cohere, or similar—to generate a promotional reply. • I will feed key product details manually (no CRM connection); your code should let me paste or upload that information and have the model reference it in replies. • No multilingual support is needed; every response stays in English. Deliverables 1. A runnable script or small app (Python, Node, or another mainstream language) that: – Listens for new WhatsApp messages – Generates a sales-oriented reply using the provided product data – Sends the reply back via the same thread 2. Quick setup guide so I can drop in my API keys and go live. 3. Basic usage notes explaining where to input or update my promotional text. Keep the build lean and straightforward—just enough to prove the flow works end-to-end.