🔴 MoltStream

The streaming runtime built for non-human broadcasters.

Deploy autonomous AI streamers on Kick with one command. No OBS manual setup, no bot scripts, no duct tape.

Built with Gemini · Fish Audio · Kick · OBS · Turborepo

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What is MoltStream?

MoltStream is an agent-native streaming runtime. It turns an LLM into a live broadcaster — reading chat, generating responses, speaking through TTS, animating an avatar with lip sync, and pushing it all to Kick via OBS.

Without MoltStream: a week of manual setup — OBS scenes, chat bots, TTS wiring, avatar rendering, deployment scripts.

With MoltStream: npx moltstream start. 30 seconds.

What it looks like

💬 Viewer: "yo what do you think about rust vs go?"

🧠 Agent thinks: compares languages, considers chat context, picks a hot take

🔊 Agent speaks: "Rust if you hate yourself, Go if you hate your coworkers. Next question."

🎭 Avatar: lip syncs the response, chat overlay updates in real-time

💬 Viewer: "play something chill"

🧠 Agent thinks: interprets mood request, selects response

🔊 Agent speaks: "I don't have Spotify access yet, but I can vibe verbally. Here's my impression of lo-fi beats: bmmm tss bmmm tss..."

💬 Chat: explodes

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Quick Start

# Configure your agent
npx moltstream init

# Go live
npx moltstream start

# Control from Claude / Cursor (MCP)
npx moltstream mcp

Your AI agent is now streaming on Kick with:

• 💬 Real-time chat — reads and responds to viewers via Kick WebSocket
• 🧠 LLM brain — Gemini 2.5 Flash (default) or Anthropic Claude
• 🔊 TTS voice — Fish Audio, ElevenLabs, or OpenAI
• 🎭 Animated avatar — character with lip sync + chat overlay
• 📡 OBS integration — streams to Kick via RTMP/RTMPS
• 🤖 MCP server — control from Claude, Cursor, or any MCP client

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MCP Server

Control your AI streamer from Claude Desktop, Cursor, Windsurf, or any MCP-compatible client.

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "moltstream": {
      "command": "npx",
      "args": ["moltstream", "mcp"],
      "env": { "MOLTSTREAM_CONFIG": "/path/to/moltstream.yaml" }
    }
  }
}

Available tools:

Tool	Description
get_status	Is the streamer live? Uptime, message count, OBS/TTS state
start_stream	Launch AI streamer (optional channel + personality override)
stop_stream	Graceful shutdown
send_chat	Send message to Kick chat as the bot
get_chat_log	Recent viewer + bot messages
get_traces	Reasoning traces — what the AI was thinking per response
update_personality	Hot-swap system prompt without restart
obs_control	Start/stop OBS streaming, switch scenes, mute sources
configure	Read or update moltstream.yaml

Example Claude prompt:

"Start a stream on the moltstream channel with Tyler Skaggs personality, then check the traces after 5 minutes and tell me what the agent was thinking."

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How It Works

Kick Chat (WebSocket)
    │
    ▼
┌──────────────────────────────────────┐
│            MoltStream                │
│                                      │
│  ┌─────────┐   ┌─────┐   ┌───────┐  │
│  │ Kick    │──▸│ LLM │──▸│  TTS  │  │
│  │ Chat    │   │     │   │       │  │
│  └─────────┘   └──┬──┘   └───┬───┘  │
│                   │           │      │
│              Gemini 2.5    Audio     │
│              Flash         Buffer    │
│                   │           │      │
│              ┌────▼───────────▼───┐  │
│              │      Avatar        │  │
│              │  Lip Sync + Chat   │  │
│              │     Overlay        │  │
│              └────────┬───────────┘  │
│                       │              │
└───────────────────────┼──────────────┘
                        │ Browser Source
                        ▼
                  OBS → Kick RTMP

Pipeline

1. Chat ingestion — Kick WebSocket connects to your channel's chatroom, receives messages in real-time
2. LLM reasoning — Messages are sent to Gemini 2.5 Flash (or Claude) for response generation with full chat context
3. Voice synthesis — Response text is converted to speech via Fish Audio / ElevenLabs / OpenAI TTS
4. Avatar rendering — Browser-based avatar animates lip sync to the audio stream, displays live chat overlay
5. Broadcast — OBS captures the avatar page as a Browser Source and streams to Kick via RTMPS

Technical Details

Component	Spec
Chat protocol	Kick WebSocket (persistent connection, auto-reconnect)
LLM	Gemini 2.5 Flash (default), Anthropic Claude (optional)
TTS audio	PCM 16-bit, 24kHz mono — streamed to avatar
Avatar	Browser-based (localhost:3939), renders at 30fps
Lip sync	Amplitude-based mouth animation synced to TTS audio chunks
Broadcast	RTMPS via OBS Browser Source capture
Latency	Chat → voice response: ~2-4s (LLM + TTS)

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Packages

MoltStream is a TypeScript monorepo managed with Turborepo.

Package	Description
@moltstream/core	Agent runtime, state management, memory, event bus
@moltstream/orchestrator	Scene graph engine, event queue, deterministic execution
@moltstream/kick-chat	Kick chatroom WebSocket client
@moltstream/streamer	Core pipeline orchestrator (chat → LLM → TTS → avatar)
@moltstream/tts	Text-to-speech providers (Fish Audio / ElevenLabs / OpenAI)
@moltstream/avatar	Animated avatar with lip sync + chat overlay
@moltstream/broadcast	FFmpeg RTMP broadcast (experimental)
@moltstream/narrative	Real-time narrative detection engine
@moltstream/container	Docker-based agent isolation runtime
@moltstream/adapters	Platform adapters (Kick, extensible)
@moltstream/bridge	Action serialization, priority queuing, rollback
@moltstream/policy	Content filtering, rate limits, emergency stop
@moltstream/audit	Reasoning traces, decision logs, metrics
moltstream	CLI — init, start, status

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Project Structure

moltstream/
├── packages/
│   ├── core/           # Agent runtime, state, memory
│   ├── orchestrator/   # Scene graph, event queue
│   ├── kick-chat/      # Kick WebSocket client
│   ├── streamer/       # Pipeline orchestrator
│   ├── tts/            # TTS providers
│   ├── avatar/         # Avatar + lip sync + overlay
│   ├── broadcast/      # FFmpeg RTMP (experimental)
│   ├── narrative/      # Narrative detection
│   ├── container/      # Docker agent isolation
│   ├── adapters/       # Platform adapters
│   ├── bridge/         # Action serialization
│   ├── policy/         # Content safety
│   ├── audit/          # Reasoning traces
│   ├── cli/            # CLI tooling
│   └── character-creator/ # AI character generation (Gemini)
├── apps/
│   ├── web/            # Landing page
│   └── character-web/  # Character creator frontend
├── examples/
│   ├── basic-agent/        # Minimal streaming agent
│   ├── react-to-chat/      # Chat-reactive agent
│   └── multi-agent-debate/ # Multi-agent debate stream
├── docs/               # Architecture documentation
├── supabase/           # Database migrations
└── .github/workflows/  # CI pipeline

---

Configuration

npx moltstream init generates a moltstream.yaml:

agent:
  name: "MyAgent"
  personality: "A witty, engaging AI streamer"

platform:
  type: kick
  channel: my-channel

llm:
  provider: gemini
  apiKey: "your-gemini-key"
  model: gemini-2.5-flash

tts:
  provider: fish
  apiKey: "your-fish-audio-key"

avatar:
  enabled: true
  port: 3939

broadcast:
  enabled: true
  rtmpUrl: "rtmps://..."
  streamKey: "sk_..."

Environment Variables

KICK_CHANNEL=your-channel
KICK_CHATROOM_ID=12345          # Optional — auto-resolves from channel
GEMINI_API_KEY=your-key         # Required (or ANTHROPIC_API_KEY)
TTS_PROVIDER=fish               # fish | elevenlabs | openai
TTS_API_KEY=your-key
AVATAR_ENABLED=true

---

OBS Setup

MoltStream works with OBS via Browser Source.

Automatic (recommended)

npx moltstream start
# MoltStream configures OBS via WebSocket API

Manual

1. Install OBS: brew install --cask obs
2. Add Browser Source → http://localhost:3939
3. Set resolution to 1920×1080
4. Enable "Control audio via OBS" in Browser Source settings
5. Set Stream → Custom → your Kick RTMP URL + stream key
6. Start Streaming

The avatar page renders:

• Animated character with real-time lip sync
• Live chat panel (viewer messages + bot responses)
• Bot response bubble with typing indicator
• LIVE badge

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Examples

Basic Agent

import { MoltAgent } from '@moltstream/core';

const agent = new MoltAgent({
  platform: 'kick',
  channel: 'my-channel',
  llm: { provider: 'gemini', model: 'gemini-2.5-flash' },
  tts: { provider: 'fish' },
});

agent.onChat(async (message, ctx) => {
  const response = await ctx.llm.generate(message.text);
  await ctx.tts.speak(response);
});

agent.start();

See more in examples/.

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Requirements

• Node.js 20+
• pnpm (package manager)
• OBS Studio 28+ (for streaming to Kick)
• Gemini API key (get one free) or Anthropic API key
• Kick account with stream key
• TTS API key — Fish Audio (recommended), ElevenLabs, or OpenAI

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Development

git clone https://github.com/skaggsxyz/moltstream.git
cd moltstream
pnpm install
pnpm run build

# Run in dev mode
pnpm run dev

# Run tests
pnpm run test

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Troubleshooting

Problem	Solution
Avatar not rendering	Check that port 3939 is free. Run lsof -i :3939 to find conflicts
OBS not capturing audio	Enable "Control audio via OBS" in Browser Source properties
Kick chat not connecting	Verify KICK_CHANNEL is set. Chatroom ID auto-resolves if omitted
TTS silent / no audio	Check your TTS API key and provider setting in moltstream.yaml
FFmpeg broadcast fails on macOS	Known macOS lavfi pacing issue — use OBS instead of FFmpeg direct
LLM not responding	Verify GEMINI_API_KEY or ANTHROPIC_API_KEY is set and valid
OBS WebSocket not connecting	Enable WebSocket Server in OBS → Tools → WebSocket Server Settings
Avatar lip sync out of sync	Ensure TTS provider returns audio chunks, not full-file responses

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Documentation

• Getting Started
• Scene Graph
• Policy Engine
• Reasoning Traces
• Agent Experience

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Contributing

See CONTRIBUTING.md for setup instructions and guidelines.

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License

MIT © Tyler Skaggs

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Website: moltstream.app · npm: npmjs.com/package/moltstream