eve

eve is a filesystem-first framework for durable AI agents. Core agent capabilities live in conventional locations, so projects are easier to inspect, extend, and operate.

A typical eve agent has this structure:

my-agent/
└── agent/
    ├── agent.ts            # Optional: model and runtime config
    ├── instructions.md     # Required: the always-on system prompt
    ├── tools/              # Optional: typed functions the model can call
    │   └── get_weather.ts
    ├── skills/             # Optional: procedures loaded on demand
    │   └── plan_a_trip.md
    ├── channels/           # Optional: message channels (HTTP, Slack, Discord)
    │   └── slack.ts
    └── schedules/          # Optional: recurring cron jobs
        └── weekly_recap.ts

Read the documentation for the full project layout and guides.

npx eve@latest init my-agent

This creates a new my-agent directory, installs its dependencies, initializes Git, and starts the interactive terminal UI.

To add eve to an existing project, pass a path:

cd myapp
npx eve@latest init .

The generated project includes an agent directory. Replace agent/instructions.md with:

You are a concise weather demo assistant. Tell users that the weather data is mocked.

Add a mock weather tool at agent/tools/get_weather.ts:

import { defineTool } from "eve/tools";
import { z } from "zod";

export default defineTool({
  description: "Return mock weather data for a city.",
  inputSchema: z.object({ city: z.string().min(1) }),
  async execute({ city }) {
    return { city, condition: "Sunny", temperatureF: 72 };
  },
});

Choose the model in agent/agent.ts:

import { defineAgent } from "eve";

export default defineAgent({
  model: "anthropic/claude-sonnet-4.6",
});

For a new scaffold, start the agent again:

npm run dev

That's a working agent. Add human-in-the-loop prompts, subagents, and schedules as needed. Follow the first-agent tutorial for a complete walkthrough.

The eve community lives on GitHub Discussions, where you can ask questions, share ideas, and show what you've built.

Contributions are welcome. See CONTRIBUTING.md to get the repo running locally and land a change, and use issues and discussions to collaborate. By participating, you agree to our Code of Conduct.

Please do not open public issues for security vulnerabilities. Instead, follow SECURITY.md and report responsibly to responsible.disclosure@vercel.com.

eve is currently in beta and subject to the Vercel beta terms; the framework, APIs, documentation, and behavior may change before general availability.