skein-js

skein-js is an open-source TypeScript server runtime that hosts LangGraph.js agents on your own infrastructure. It provides persistent multi-turn conversations addressable by ID, token streaming with connection recovery, human-in-the-loop interrupts for approval or corrections, background job scheduling, and durable execution that recovers from process failures. Built with Claude Code, it includes a console for monitoring and integrates with Express, Fastify, NestJS, Next.js, Bun, Deno, and frontend frameworks.

Designed for teams building production AI agents who need control over data, infrastructure, and conversation state. Supports workflows that branch, call tools, pause for people, and resume later, with webhook integrations for WhatsApp, email, Slack, and GitHub.