A simple programmable AI CLI

ai-demo.ts

import { type ModelMessage, generateText } from 'ai';
import { intro, log, text, isCancel, outro, spinner } from '@clack/prompts';
import { anthropic } from '@ai-sdk/anthropic';

intro(`AI Assistant`);

const systemContent = `You are a helpful AI assistant`

const conversation: ModelMessage[] = [
  {
    role: 'system',
    content: systemContent
  }
];

while (true) {
  const question = await text({ message: '' });
  if (isCancel(question)) {
    break;
  }
  conversation.push({ role: 'user', content: question });

  await getResponse();
}

outro('See you later!');

async function getResponse() {
  const s = spinner();
  s.start('Generating response...');
  console.time('Generate');
  const { text } = await generateText({
    model: anthropic('claude-haiku-4-5-20251001'),
    // model: openai('gpt-5-mini'),
    messages: conversation,
  });
  console.timeEnd('Generate');
  s.stop('');

  log.info(text);
  conversation.push({ role: 'assistant', content: text });
}