wehub-resource-sync
82 lines
2.3 KiB
TypeScript
82 lines
2.3 KiB
TypeScript
// File: src/index.ts
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// Standalone Express server with CopilotKit runtime (single-route)
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//
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// Frontend pairing: because this server is single-route AND cross-origin,
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// the provider must use useSingleEndpoint (true) and an absolute runtimeUrl,
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// e.g. <CopilotKit runtimeUrl="http://localhost:4000/api/copilotkit"
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// useSingleEndpoint>. The nextjs-app-router-page.tsx asset is for the
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// same-origin multi-route Hono route (useSingleEndpoint={false}) and does
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// NOT pair with this server.
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//
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// Prerequisites:
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// npm install @copilotkit/runtime express dotenv zod
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// npm install -D @types/express tsx typescript
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//
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// Environment variables (store secrets in env, never hardcode them):
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// OPENAI_API_KEY=<your-api-key> (or ANTHROPIC_API_KEY / GOOGLE_API_KEY)
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// PORT=4000 (optional, defaults to 4000)
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//
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// Run:
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// npx tsx watch src/index.ts
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import express from "express";
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import dotenv from "dotenv";
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import { z } from "zod";
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import {
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CopilotRuntime,
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BuiltInAgent,
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defineTool,
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} from "@copilotkit/runtime/v2";
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import { createCopilotExpressHandler } from "@copilotkit/runtime/v2/express";
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dotenv.config();
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// Example server-side tool
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const weatherTool = defineTool({
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name: "getWeather",
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description: "Get the current weather for a city",
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parameters: z.object({
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city: z.string().describe("The city name"),
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}),
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execute: async ({ city }) => {
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// Replace with real weather API call
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return { city, temperature: 72, condition: "sunny" };
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},
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});
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const agent = new BuiltInAgent({
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model: "openai/gpt-4o",
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prompt: "You are a helpful AI assistant.",
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tools: [weatherTool],
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// Allow multiple steps so the agent can call the tool and then use the
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// result to answer. Without maxSteps the agent stops after a single step
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// (the underlying AI SDK default), emitting the tool call but never
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// producing a final reply.
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maxSteps: 5,
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});
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const runtime = new CopilotRuntime({
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agents: {
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default: agent,
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},
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});
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const app = express();
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app.use(
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"/api/copilotkit",
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createCopilotExpressHandler({
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runtime,
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basePath: "/",
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mode: "single-route",
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}),
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);
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const port = Number(process.env.PORT ?? 4000);
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app.listen(port, () => {
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console.log(
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`CopilotKit runtime listening at http://localhost:${port}/api/copilotkit`,
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);
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});
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