E2B - Zap

First-party adapter over Firecracker microVMs (sandbox.e2b plugin).

Isolation: microvm (Firecracker).
Lifecycle: Sandbox.create → run → pause() (stop) → Sandbox.connect(id) (resume). pause also backs snapshot(): it persists the filesystem and returns a resumable sandbox id.
Ports: getHost(port) returns a public HTTPS host; no private ports.
Pinned SDK: e2b@2.6.4.

import { createE2BProvider } from "@wzrdtech/zap-sandbox/adapters/e2b";

const provider = createE2BProvider({
  apiKey, // E2B_API_KEY — injected by the composition, never process.env
  createSandbox: wireE2BSdk(apiKey),
  connectSandbox: (id) => connectE2BSdk(apiKey, id),
});

zap doctor reports first-party; ok: false without an API key. Live conformance tests are opt-in (RUN_HOSTED_SANDBOX_TESTS=1 + E2B_API_KEY).