# Swirls > Swirls is a durable, security-first runtime for agentic AI workflows. > Define workflows in `.swirls` files, run locally for free, deploy to Swirls Cloud. ## Key pages - Homepage: https://swirls.ai - Cloud (managed runtime): https://swirls.ai/cloud - Security model: https://swirls.ai/security - Pricing: https://swirls.ai/pricing - Blog: https://swirls.ai/blog ## Documentation - Docs: https://swirls.ai/docs - Expanded site context (this host): https://swirls.ai/llms-full.txt - Full documentation for LLMs (generated from docs): https://swirls.ai/docs/llms-full.txt ## Key facts - `.swirls` is a domain-specific language for defining agentic workflows - Permissions are derived from the SHA-256 hash of the workflow file - Runtime supports durable execution, human-in-the-loop review, and tamper-evident audit logs - Local runtime is free and open; Swirls Cloud starts at $30/month - Built with TypeScript ## Links - GitHub organization: https://github.com/byteslicehq - Discord community: https://discord.gg/ZXTBZGjQ5a