FastClaw

A lightweight AI Agent runtime written in Go.

Single binary - Any LLM - Multi-agent - Sandbox - Cloud-ready

Install - Quick Start - Architecture - Features

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What is FastClaw?

FastClaw is an Agent Factory — it creates, manages, and runs AI agents. Each agent has its own personality (SOUL.md), memory, skills, and tools. FastClaw handles the LLM communication, tool execution, sandbox isolation, and session management.

# Install and run
curl -fsSL https://raw.githubusercontent.com/fastclaw-ai/fastclaw/main/install.sh | bash
fastclaw    # Opens setup wizard at http://localhost:18953

Quick Start

1. First Run

./fastclaw
# Opens setup wizard → configure LLM provider → creates default agent
# Admin token is generated — save it for dashboard login

2. Dashboard

Open http://localhost:18953 and login with your admin token.

• Agents — Create and manage agents, each with its own personality and model
• Skills — Install shared skills from ClawHub or GitHub
• Models — Configure LLM providers (OpenAI, Anthropic, Ollama, OpenRouter, etc.)
• Settings — Storage, sandbox, gateway configuration

3. Agent Management

Click an agent to enter its management panel:

• Chat — Talk to the agent (debug/test)
• Files — Edit SOUL.md, IDENTITY.md, MEMORY.md, etc.
• Skills — Agent-private skills
• Models — Agent-specific model overrides
• Sessions — Conversation history

Architecture

~/.fastclaw/
  fastclaw.json              # Global config (gateway, storage, providers, defaults)
  apikeys.json               # API keys for external access
  skills/                    # Shared skills (bundled + installed)
  agents/
    default/agent/           # Agent workspace
      agent.json             # Agent config (model override)
      SOUL.md                # Personality
      MEMORY.md              # Long-term memory
      sessions/              # Conversation history
      skills/                # Agent-private skills
    my-coder/agent/
      ...

Storage

Data	storage: "file"	storage: "postgres"
Global config	File (always)	File (bootstrap)
Sessions	JSONL files	DB
Memory / SOUL.md	Files	DB
Agent config	Files	DB
Skills	Files (always)	Files (always)

What FastClaw Stores

Data	Belongs to	Storage
SOUL.md, IDENTITY.md	Agent	FastClaw
MEMORY.md	Agent	FastClaw
Skills	Agent / Global	FastClaw
Sessions	Agent	FastClaw
User accounts, billing	Application	Your app (ChatClaw, etc.)
Output files	Application	Your app / S3

Features

LLM Providers

• OpenAI, Anthropic, Ollama, OpenRouter, Groq, DeepSeek, Mistral, and any OpenAI-compatible API
• Per-agent model override
• Prompt cache support (RawAssistant preservation)

Tools & Sandbox

• Built-in: exec, read_file, write_file, list_dir, web_fetch, web_search, memory_search
• E2B cloud sandbox or Docker sandbox
• MCP server support
• Plugin system (JSON-RPC subprocess)

Skills

• Bundled skills: code-runner, image-gen, data-analysis, translation, web-search, skill-manager
• Install from ClawHub or skills.sh
• Agent-private or globally shared

Memory

• MEMORY.md — long-term facts, auto-updated by heartbeat
• Session-based context with full history preservation
• Thinking/reasoning content preserved for memory extraction

API

• OpenAI-compatible /v1/chat/completions (streaming)
• Web chat /api/chat/stream (SSE)
• Session management /api/chat/sessions
• Agent CRUD /api/agents
• Provider management /api/config
• Skill install /api/skills/install (ClawHub + GitHub)
• API key management /v1/admin/apikeys

Configuration

fastclaw.json

{
  "gateway": {
    "port": 18953,
    "auth": { "token": "your-admin-token" }
  },
  "storage": {
    "type": "postgres",
    "dsn": "postgres://user:pass@localhost:5432/fastclaw?sslmode=disable",
    "autoMigrate": true
  },
  "sandbox": {
    "enabled": true,
    "backend": "e2b",
    "e2bKey": "e2b_..."
  },
  "providers": {
    "openrouter": {
      "apiKey": "sk-or-...",
      "apiBase": "https://openrouter.ai/api/v1",
      "apiType": "openai"
    }
  },
  "agents": {
    "defaults": {
      "model": "openrouter/openai/gpt-4o",
      "maxTokens": 8192,
      "temperature": 0.7
    }
  }
}

Deployment

Local

./fastclaw gateway

Docker

cd deploy/docker && ./start.sh

Kubernetes

volumeMounts:
  - name: config
    mountPath: /root/.fastclaw/fastclaw.json
    subPath: fastclaw.json
env:
  - name: FASTCLAW_STORAGE_DSN
    valueFrom:
      secretKeyRef:
        name: fastclaw-db
        key: dsn

Building

# Build frontend
cd web && pnpm install && pnpm build
cp -r out ../internal/setup/web

# Build binary
go build -o fastclaw ./cmd/fastclaw

License

MIT