打造你的专属AI编程助手:GitHub Copilot 自定义 Agents 与 Skills 终极指南

Terminal

mkdir copilot-agent-demo && cd copilot-agent-demo
npm init -y
npm install express @github/copilot-extension-sdk

const express = require('express');
const { createCopilotExtension } = require('@github/copilot-extension-sdk');

const app = express();
app.use(express.json());

app.post('/api/copilot', async (req, res) => {
    const messages = req.body.messages;
    const userMessage = messages[messages.length - 1].content;

    const systemPrompt = {
        role: 'system',
        content: '你是一个经验丰富的 GitHub Issue 助手。你的任务是帮助用户分析和总结 Issue。请保持专业和简洁。'
    };

    const llmResponse = await mockLLMCall([systemPrompt, ...messages]);

    res.setHeader('Content-Type', 'text/event-stream');
    res.write(`data: {"choices": [{"delta": {"content": "${llmResponse}"}}]}\n\n`);
    res.write('data: [DONE]\n\n');
    res.end();
});

const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
    console.log(`Agent server running on port ${PORT}`);
});

async function mockLLMCall(messages) {
    return "我已经收到了你的请求，正在为你分析 Issue...";
}

const fetchIssueSkill = {
    name: "get_github_issue",
    description: "获取指定 GitHub 仓库的 Issue 详情",
    parameters: {
        type: "object",
        properties: {
            owner: { type: "string", description: "仓库所有者名称" },
            repo: { type: "string", description: "仓库名称" },
            issue_number: { type: "integer", description: "Issue 的编号" }
        },
        required: ["owner", "repo", "issue_number"]
    }
};

app.post('/api/copilot', async (req, res) => {
    const messages = req.body.messages;

    const llmRequestPayload = {
        messages: [systemPrompt, ...messages],
        tools: [{ type: "function", function: fetchIssueSkill }],
        tool_choice: "auto"
    };

    const requiresAction = true; // 模拟大模型决定调用 get_github_issue

    if (requiresAction) {
        const functionArgs = { owner: "octocat", repo: "Hello-World", issue_number: 1 };
        const issueData = await fetch(`https://api.github.com/repos/${functionArgs.owner}/${functionArgs.repo}/issues/${functionArgs.issue_number}`).then(r => r.json());
        const finalResponse = `根据查询，Issue #1 的标题是：${issueData.title}。内容是：${issueData.body}`;
        res.write(`data: {"choices": [{"delta": {"content": "${finalResponse}"}}]}\n\n`);
    }

    res.write('data: [DONE]\n\n');
    res.end();
});