AI SDK - GitHub Copilot Harness

The @ai-sdk/harness-github-copilot package runs GitHub Copilot CLI through its Agent Client Protocol server and the AI SDK harness abstraction.

Setup

npm install @ai-sdk/harness @ai-sdk/harness-github-copilot @ai-sdk/sandbox-vercel

Usage

import { HarnessAgent } from '@ai-sdk/harness/agent';
import { githubCopilot } from '@ai-sdk/harness-github-copilot';
import { createVercelNetworkSandboxSession } from '@ai-sdk/sandbox-vercel';

const agent = new HarnessAgent({
  harness: githubCopilot,
});

const sandboxSession = await createVercelNetworkSandboxSession({
  runtime: 'node24',
  ports: [4000],
  template: await agent.getSandboxTemplate(),
});
const session = await agent.createSession({ sandboxSession });

try {
  const result = await agent.generate({
    session,
    prompt: 'Inspect this project and summarize its purpose.',
  });
  console.log(result.text);
} finally {
  await session.destroy();
  await sandboxSession.destroy();
}

The adapter uses @ai-sdk/harness-acp, which installs the pinned GitHub Copilot CLI inside the sandbox. The sandbox must provide network access and at least one exposed TCP port.

Set one of COPILOT_GITHUB_TOKEN, GH_TOKEN, or GITHUB_TOKEN for direct authentication. Without one of these variables, direct authentication reads the GitHub Copilot CLI login from the host's native credential store or plaintext fallback. If neither contains a token and the host has gh on PATH, the adapter reads gh auth token without modifying either credential store. Set AI_GATEWAY_API_KEY or VERCEL_OIDC_TOKEN to use AI Gateway instead, or pass an isolated authentication environment with createGitHubCopilot({ auth: { AI_GATEWAY_API_KEY: token } }).

See the GitHub Copilot harness documentation for authentication security, settings, tools, and lifecycle support.