Welcome to Loopstack

Loopstack is a TypeScript workflow framework for building stateful automations, AI agents, and interactive workflows on top of NestJS.

What You Can Build

• AI-powered workflows — Connect LLMs to tools, documents, and external services
• Multi-turn chat agents — Build conversational experiences with tool calling and message history
• Human-in-the-loop automations — Pause workflows for user review, input, or confirmation
• Data processing pipelines — Chain tools, transform data, and route dynamically based on conditions
• OAuth-integrated apps — Authenticate users with Google, GitHub, and custom providers

How It Works

Loopstack workflows are TypeScript classes that define a state machine. Each workflow has:

• Transitions — Decorated methods (@Initial, @Transition, @Final) that move between states
• Tools — Reusable logic units injected via @InjectTool() and called directly in TypeScript
• Documents — Typed data objects displayed in the Loopstack Studio UI
• Guards — Conditional routing based on state or results

Getting Started

Head to the Quick Start Guide to install Loopstack and run your first workflow in under a minute.