Eve

Eve has its own agent runtime and default harness. This integration does not use @ai-sdk/harness; it implements Eve's SandboxBackend interface.

Installation

Eve requires Node.js 24 or newer. For a manual Eve setup, install its normal dependencies with Sandbox SDK:

bun add @opencoredev/sandbox-sdk eve ai zod

Configure the backend

import { defineSandbox } from "eve/sandbox";
import { createEveSandboxBackend } from "@opencoredev/sandbox-sdk/eve";
import { local } from "@opencoredev/sandbox-sdk/local";

export default defineSandbox({
  backend: createEveSandboxBackend({ provider: local() }),
  revalidationKey: () => "repo-bootstrap-v1",
  async bootstrap({ use }) {
    const sandbox = await use();
    await sandbox.writeTextFile({ path: "READY", content: "yes\n" });
  },
  async onSession({ use }) {
    await use();
  },
});

Eve runs bootstrap once for a template identity. Each durable session starts from those files, keeps later writes isolated, and can reconnect through Eve's saved backend metadata.

Choose a provider

import { local } from "@opencoredev/sandbox-sdk/local";
const backend = createEveSandboxBackend({ provider: local() });

import { e2b } from "@opencoredev/sandbox-sdk/e2b";
const backend = createEveSandboxBackend({ provider: e2b() });

import { daytona } from "@opencoredev/sandbox-sdk/daytona";
const backend = createEveSandboxBackend({ provider: daytona() });

import { vercel } from "@opencoredev/sandbox-sdk/vercel";
const backend = createEveSandboxBackend({ provider: vercel({ ports: [3000] }) });

import { upstash } from "@opencoredev/sandbox-sdk/upstash";
const backend = createEveSandboxBackend({ provider: upstash({ runtime: "node" }) });

The backend maps Eve seed files, filesystem methods, process streams, reconnect metadata, and shutdown. Network-policy changes throw an unsupported SandboxError when the selected provider cannot enforce them.

Read next

Compare exact provider behavior in Compatibility, or return to the Integrations overview.