Architecture

Real-time voice over WebRTC to OpenAI's Realtime API. STT, intent parsing, and TTS happen in a single bidirectional streaming connection — no separate chat/completions + audio/speech round-trips.

┌────────────┐   mic audio    ┌──────────────────────┐
│  Browser   │───────────────>│ OpenAI Realtime API  │
│            │<───────────────│ (gpt-realtime, WebRTC)│
│            │  assistant     └──────────┬───────────┘
│  ┌──────┐  │  audio                    │
│  │ UI   │  │                           │ function calls
│  │(read │  │                           │ (JSON on data
│  │ only)│  │                           │  channel)
│  └──────┘  │                           ▼
│  ┌──────┐  │                  executed locally
│  │Store │◄─┼──────────────────against storage
│  └──────┘  │
└────────────┘