agentbox-sdk MCP Server

From the README

# AgentBox

[Live demo](https://agentbox-demo-175164121374.us-west1.run.app/)

Run coding agents inside sandboxes. One API, any provider.

Unlike wrappers that shell out to CLIs in non-interactive mode (e.g. `claude --print`), AgentBox launches each agent as a **server process** inside the sandbox and communicates over WebSocket or HTTP. This preserves the full interactive capabilities of each agent — approval flows, tool-use control, streaming events.

```ts
import { Agent, Sandbox } from "agentbox-sdk";

const sandbox = new Sandbox("local-docker", {
  workingDir: "/workspace",
  image: process.env.IMAGE_ID!,
  env: { ANTHROPIC_API_KEY: process.env.ANTHROPIC_API_KEY! },
});

await sandbox.findOrProvision();

const run = new Agent("claude-code", {
  sandbox,
  cwd: "/workspace",
  approvalMode: "auto",
}).stream({
  model: "sonnet",
  input: "Create a hello world Express server in /workspace/server.ts",
});

for await (const event of run) {
  if (event.type === "text.delta") process.st