The AI framework.
Free & open source under BSL license
Composable Building Blocks
Code the logic - Configure the UI
@Workflow({ uiConfig: __dirname + '/chat.ui.yaml' })
export class ChatWorkflow extends BaseWorkflow {
@InjectTool() claudeGenerateText: ClaudeGenerateText;
@Initial({ to: 'waiting_for_user' })
async setup() {}
@Transition({ from: 'waiting_for_user', to: 'ready', wait: true })
async userMessage(payload: string) {
await this.repository.save(MessageDocument, { role: 'user', content: payload });
}
@Transition({ from: 'ready', to: 'waiting_for_user' })
async llmTurn() {
const result = await this.claudeGenerateText.call({ ... });
await this.repository.save(MessageDocument, result.data!);
}
}Workflows
Workflows are TypeScript state machines with explicit states and transitions. Mix agentic LLM calls with deterministic steps in the same flow. Pause for human input with wait: true, and state is checkpointed after every step. If something fails, resume from exactly where you left off.
Key Benefits
Drop an LLM call into any point in a deterministic workflow, or nest agents inside structured pipelines. One system, not two bolted together.
Explicit states and transitions, not arbitrary graphs. Formal guarantees about valid paths make workflows easy to reason about, debug, and visualize.
Every step is checkpointed to the database. If a process fails, resume from the last successful state. Works the same for workflow steps and agentic loops.
Approvals, forms, confirmations, and clarifications ship as framework primitives. Pause for human input for hours or days and resume cleanly.
Dependency injection, modules, guards, and a massive ecosystem out of the box. The React frontend ships end-user applications, not just backend pipelines.
Every state transition, tool call, and LLM decision is recorded. Replay any execution step by step, audit what happened, and pinpoint exactly where things went wrong.
Install production-grade tools and workflow templates with a single command. AI providers, OAuth flows, sandboxed code execution, and more - ready to use or customize.
Break complex processes into composable sub-workflows that run independently and report back. Nest them arbitrarily deep - each with its own state, tools, and lifecycle.
Extend it like any NestJS app. No vendor lock-in, no external execution engine. Free and open source under the BSL license.
Run and Interact in the browser
Use the built-in ReactJS frontend for running, debugging and organizing automations.
Supported by:
