Flue

The banner shows the boxd.sh and Flue logos, with Flue described as the agent harness framework.

Flue is the agent harness framework from Fred K. Schott, known from Astro. It works like Claude Code, headless and programmable in TypeScript. Flue agents can opt into a full sandbox, and the boxd connector gives each agent its own Linux machine:

import { Compute } from '@boxd-sh/sdk';
import { boxd } from './connectors/boxd';

const c = new Compute({ apiKey: process.env.BOXD_API_KEY });
const box = await c.box.create({ name: 'my-agent' });
const agent = await init({ sandbox: boxd(box), model: 'anthropic/claude-sonnet-4-6' });
const session = await agent.session();

You own the machine’s lifecycle, and the connector adapts it to Flue’s sandbox interface. The connector is built against version 0.1 of @boxd-sh/sdk, so this sample uses that version’s Compute client and not the Boxd client in the current TypeScript SDK. The connector is written so a coding agent can install it into your Flue project, and Flue’s own docs cover it under sandboxes.

Getting started

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References