개요
Flue 是一个 TypeScript 框架，专为构建代理而设计，内置代理 harness，支持多种沙箱，可部署到任何环境，强调运行时无关性和可编程性。
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> **Experimental** — Flue is under active development. APIs may change.\n>\n> Looking for `v0.0.x`? [See here.](https://github.com/withastro/flue/tree/v0.0.x)\n\n# Flue\n\nFlue is **The Agent Harness Framework.** If you know how to use Claude Code (or Codex, OpenCode, Pi, etc)... then you already know the basics of how to build agents with Flue.\n\nFlue is a TypeScript framework for building the next generation of agents, designed around a built-in **agent harness**. It's like Claude Code, but 100% headless and programmable. There's no baked-in assumption like requiring a human operator to function. No TUI. No GUI. Just TypeScript.\n\nBut using Flue feels like using Claude Code. The agents you build act autonomously to solve problems and complete tasks. They require very little code to run — most of the "logic" lives in Markdown: skills, context, and `AGENTS.md`.\n\nFlue isn't another AI SDK. It's a proper runtime-agnostic framework — think Astro or Next.js, but for agents. Write once, build, and deploy your agents anywhere (Node.js, Cloudflare, GitHub Actions, GitLab CI/CD, etc).\n\n## Packages\n\n| Package | Description |\n| ----------------------------- | --------------------------------------- |\n| [`@flue/sdk`](packages/sdk) | Core SDK: build system, sessions, tools |\n| [`@flue/cli`](packages/cli) | CLI for building and running agents |\n\n## Examples\n\n### Quickstart\n\nThe simplest agent — no container, no tools, just a prompt and a typed result.\n\nUnless you opt-in to initializing a full container sandbox, Flue will default to a virtual sandbox for every agent, powered by [just-bash](https://github.com/vercel-labs/just-bash). A virtual sandbox is going to be dramatically faster, cheaper, and more scalable than running a full container for every agent, which makes it perfect for building high-traffic/high-scale agents.\n\n```ts\n// .flue/agents/hello-world.ts\nimport type { FlueContext } from '@flue