Vercel AI SDK

npm install @cascadeflow/vercel-ai

import { createChatHandler } from '@cascadeflow/vercel-ai';
import { CascadeAgent } from '@cascadeflow/core';

const agent = new CascadeAgent({
  models: [
    { name: 'gpt-4o-mini', provider: 'openai', cost: 0.000375 },
    { name: 'gpt-4o', provider: 'openai', cost: 0.00625 },
  ],
});

const handler = createChatHandler(agent, {
  protocol: 'data',           // AI SDK v4 data stream
  tools,                       // Tool definitions
  toolHandlers,                // Server-side tool execution
  maxSteps: 5,                 // Multi-step tool loops
});

// Use in Next.js API route, Express, or any Node.js server
export const POST = handler;

import { useChat } from 'ai/react';

export default function Chat() {
  const { messages, input, handleSubmit, handleInputChange } = useChat({
    api: '/api/chat',
  });

  return (
    <div>
      {messages.map((m) => (
        <div key={m.id}>{m.content}</div>
      ))}
      <form onSubmit={handleSubmit}>
        <input value={input} onChange={handleInputChange} />
      </form>
    </div>
  );
}

const handler = createChatHandler(agent, {
  protocol: 'data',
  allowOverrides: ['forceDirect', 'maxSteps'],
  overrideSecret: process.env.OVERRIDE_SECRET,
});