eve
The Framework for Building Agents
What is it?
What it is
A filesystem-first framework for building durable AI agents, where agent capabilities such as instructions, tools, skills, channels, and schedules are organized in conventional directories under an `agent/` folder.
Why it exists
To simplify the inspection, extension, and operation of AI agent projects by placing core agent logic in predictable filesystem locations, reducing configuration overhead and providing a clear authoring interface.
Who should use it
Developers familiar with TypeScript/JavaScript who want to build durable AI agents with a clear, filesystem-based structure; teams looking for an inspectable, extensible agent framework.
Who should avoid it
Those new to TypeScript or AI agent concepts, users seeking no-code/low-code solutions, or anyone requiring a stable, production‑grade framework (eve is currently in beta).
How it works
A quick walkthrough in plain English
How eve works in 4 steps
Step 1 of 4
Something triggers the flow
A schedule, webhook, or manual click tells eve to start.
Features
Advantages
- Open source (Apache-2.0)
- Active TypeScript ecosystem
- Self-hosted deployment options
Disadvantages
- Requires operational ownership for self-hosted setups
- Community support varies by project maturity
Installation
native
Read the [documentation](https://eve.dev/docs) for the full project layout and guides. ## Quick start
FAQ
How do I create a new eve agent project?
Run `npx eve@latest init my-agent` to scaffold a new agent directory, install dependencies, initialize Git, and start the interactive terminal UI. To add eve to an existing project, navigate to the project and run `npx eve@latest init .`.
What files are required in an eve agent's `agent/` directory?
The only required file is `agent/instructions.md`, which contains the always-on system prompt. Other files like `agent.ts`, tools, skills, channels, and schedules are optional.
How do I define a tool that the agent can call?
Create a TypeScript file under `agent/tools/` (e.g., `get_weather.ts`). Import `defineTool` from `eve/tools`, define a description, input schema using Zod, and an `execute` function that returns the tool's result.
How do I configure the language model for my agent?
Edit (or create) `agent/agent.ts` and export a default agent via `defineAgent`. Set the `model` field to the desired model identifier, for example `model: "anthropic/claude-sonnet-5"`.
How do I start developing and testing my agent locally?
After scaffolding or configuring your agent, run `npm run dev` (or `npx eve dev`) to start the agent in development mode. This launches the interactive terminal UI where you can interact with the agent.
Where can I find the full documentation and tutorials for eve?
The documentation is bundled with the package and can be read locally from `node_modules/eve/docs`. Online, visit https://eve.dev/docs for guides, the first-agent tutorial, and API reference.
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