Installation

pnpm add @tanstack/workflow-core

Install zod or another Standard Schema library if you use input / output / state / waitForEvent({ schema }) validation.

Storage

Run state lives in a RunStore. Ships with one in-memory implementation:

import { inMemoryRunStore } from '@tanstack/workflow-core'
const runStore = inMemoryRunStore({ ttl: 60 * 60 * 1000 }) // 1h, paused runs exempt

Durable adapters (Postgres, SQLite, D1, Durable Objects, Redis) are forthcoming as @tanstack/workflow-* packages.

Engine is framework-agnostic. Two entry points:

runWorkflow({...}) — long-lived process or SSE handler. Returns AsyncIterable<WorkflowEvent>.
handleWorkflowWebhook({...}) — stateless one-invocation drive. Returns the appended events.

Use either with TanStack Start server functions, Hono, Express, Cloudflare Workers, AWS Lambda — anything that can receive an HTTP request.

None yet. React / Solid / Vue / Svelte hooks (useWorkflow) ship in follow-up packages.