Vercel releases eve: an open-source AI agent framework where each agent is a directory of files mapped to capabilities.
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Vercel releases eve: an open-source AI agent framework where each agent is a directory of files mapped to capabilities. June 17, 2026 Vercel has released eve, an open-source framework for building, running, and scaling agents. The project is published as the npm package eve, licensed under Apache-2.0. Building an agent should mean defining what it does. It should not mean assembling all the plumbing that an agent needs to run in production. eve is the framework Vercel builds and runs its own agents on. According to Vercel post, it runs more than a hundred agents in production today. What is eve? eve is a filesystem-first framework for durable backend agents. You create an agent as a directory on disk. The directory is the contract. Each file describes one component of the agent. At a glance, the tree shows what an agent is and does. It also shows where it lives and when it acts on its own. The smallest agent that runs is two files. One sets the model. The other sets the instructions. // agent/agent.ts import {defineAgent} from "eve"; export default defineAgent({ model: "anthropic/claude-opus-4.8",}); The model is one line, and provider fallbacks are supported through AI Gateway. The instructions.md file becomes the system prompt that eve puts in front of every model call. An agent is a directory. Vercel's core idea is that agents have a shape. Every team kept...
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