scripts/debug_yf.ts

import yahooFinance from 'yahoo-finance2';

console.log('Type:', typeof yahooFinance);
console.log('Value:', yahooFinance);

try {
  const result = await yahooFinance.quote('AAPL');
  console.log('Success:', result);
} catch(e) {
  console.error('Error:', e.message);
}