# Kira ✨

AI body double — a girly-pop focus companion with real-time voice conversation, lo-fi music, ADHD tools, and a customizable avatar.

Your wife's very own focus bestie who's always there when her real body double isn't available.

## Features

- **🎙️ Voice conversation** — Push-to-talk microphone → STT (Whisper) → LLM (DeepSeek) → TTS (OpenAI Nova voice)
- **💬 Text chat fallback** — Type when you don't want to speak
- **🎶 Lo-fi music** — Streaming from Lofi Girl YouTube channel
- **🍅 Timer** — Pomodoro, countdown, stopwatch modes
- **📝 Notes** — Quick task list / check-in notes
- **🎨 10 background scenes** — Cozy room, coffee shop, garden, rainy window, starry night, sakura, ocean, autumn, winter cabin, sunset
- **✨ Particle effects** — Rain, stars, cherry petals, snow per scene
- **👘 Wardrobe** — 5 outfits + 5 accessories (bow, glasses, flower crown, earrings, scarf)
- **🐱 Pet zone** — Two cats: Mochi (orange fluffy) and Luna (sleepy black)
- **🕐 Live clock** — Time + date
- **🌸 Animated avatar** — Blinking, speaking mouth, waving, outfit colors (Live2D-ready)

## Quick Start

### 1. Get API keys

| Service | What for | Where |
|---------|----------|-------|
| OpenAI | Whisper STT + TTS (Nova voice) | https://platform.openai.com/api-keys |
| DeepSeek | LLM brain | https://platform.deepseek.com/api_keys |

### 2. Configure

```bash
cd ~/Projects/ai-body-double
cp .env.example .env
# Edit .env with your API keys:
#   OPENAI_API_KEY=sk-...
#   HONCHO_API_KEY=...
```

### 3. Run

```bash
docker compose up -d
```

Open **http://kira.hobokenchicken.com:3000** (or wherever you deploy it).

### 4. Add a Caddy entry (homelab)

```
kira.hobokenchicken.com {
    reverse_proxy 172.20.0.X:3000
}
```

## Architecture

```
Browser (React + Live2D + WhiteNoise + Notes) ──WebSocket──▶ Backend (FastAPI)
  │                                                              │
  ├─ Mic (MediaRecorder full webm on stop) ────────────────────▶ ├─ gpt-4o-transcribe (REST STT, emits delta)
  │                                                              ├─ gpt-5.4-nano + Honcho memory context
  │ ◀── Incremental Opus chunks (play on arrival) ─────────────── ├─ OpenAI TTS streaming (sage)
  │                                                              │
  ├─ YouTube lofi + Web Audio noise (independent)                │
  ├─ Timer / Notes / Pets / Wardrobe / Scenes                    │
  └─ Live2D (or fallback) avatar                                 │
```

Note: Realtime WebSocket STT (gpt-realtime-whisper) was attempted for true streaming but blocked by model access — current REST path is stable and cheap.

## Live2D Model Setup

Kira currently uses a CSS/SVG animated placeholder avatar. To add a Live2D model:

1. Commission or obtain a `.model3.json` (Cubism 4.x format) model
2. Place the model directory in `frontend/public/live2d/models/`
3. Rename the model entry point to `kira.model3.json`
4. The WebGL renderer will auto-detect and switch

Required model files:
- `kira.model3.json` — model definition
- `kira.moc3` — mesh/deformer data
- `kira.cdi3.json` — display info (optional)
- `textures/` — PNG texture files
- `motions/` — animation files (optional)
- `expressions/` — face expression files (optional)

Recommended creators for custom Live2D models: search VGen, VTube Studio model artists, or Fiverr.

## Color Palette

| Token | Hex | Usage |
|-------|-----|-------|
| Kira Pink | `#FFB6C1` | Primary accent |
| Kira Lavender | `#D8B4FE` | Secondary accent |
| Kira Mint | `#A7F3D0` | Success/status |
| Background | `#FFF5F5` | Card/comfy bg |
| Text Plum | `#4A1942` | Body text |
| Text Violet | `#7C3AED` | Soft text |

## Project Structure

```
ai-body-double/
├── docker-compose.yml
├── .env
├── backend/          # FastAPI + WebSocket
│   ├── main.py       # WS handler (STT→LLM→TTS pipeline)
│   ├── services/
│   │   ├── stt.py    # OpenAI Whisper
│   │   ├── llm.py    # DeepSeek
│   │   └── tts.py    # OpenAI TTS
│   └── config.py     # Env config
├── frontend/         # React + Vite + TailwindCSS
│   ├── src/
│   │   ├── App.tsx           # Main layout
│   │   ├── components/
│   │   │   ├── AnimatedAvatar.tsx  # SVG animated character
│   │   │   ├── KiraAvatar.tsx      # Live2D loader + fallback
│   │   │   ├── ChatBubble.tsx      # Conversation display
│   │   │   ├── Timer.tsx           # Pomodoro/stopwatch
│   │   │   ├── MusicPlayer.tsx     # Lofi Girl embed
│   │   │   ├── PetZone.tsx         # Two CSS cats
│   │   │   ├── Wardrobe.tsx        # Outfit + accessories
│   │   │   └── Particles.tsx       # Rain/stars/petals/snow
│   │   └── hooks/
│   │       └── useConversation.ts  # WS + audio management
│   └── public/live2d/     # Cubism SDK + model slot
└── README.md
```
