I got tired of seeing small businesses miss calls. So I built Vokio — a voice AI agent that answers real phone calls, remembers callers between sessions, and generates a post-call summary automatically. Here's the full architecture and how I solved the hard parts. Stack Python + Flask (webhook server) Vapi (telephony + STT) Claude Haiku (conversation) Deepgram Nova 3 (Spanish STT) Azure TTS (Spanish voices) SQLite (memory between calls) How it works Vapi handles the ph...