Hi, I am looking for a developer to build an MVP of an AI agent system inspired by OpenClaw architecture. The first version should focus on a WhatsApp AI assistant that can communicate with leads, qualify them, and automatically book appointments. Main requirements • WhatsApp Business API integration • AI conversation agent (LLM-based) that can respond naturally and guide the conversation toward booking • Calendar integration (Google Calendar or Calendly) to schedule appointments automatically • CRM integration to create/update leads • Human override (ability to take control of the conversation) Expected volume: ~50 new leads per day ~100 messages per day Architecture requirement The system should be built as a modular AI agent with a tools layer, so it can be expanded later into a full OpenClaw-style autonomous AI system with additional tools and integrations. Example architecture: WhatsApp → Webhook → AI Agent → LLM → Tools (CRM, Calendar, Messaging) Suggested stack Python (FastAPI) OpenAI / Claude PostgreSQL WhatsApp Business API Docker Please include in your proposal • Short architecture outline • Tech stack • Example of a similar system you built • Estimated timeline and cost Target MVP timeline: 1-2 weeks